WO2022253315A1

WO2022253315A1 - Material split charging device

Info

Publication number: WO2022253315A1
Application number: PCT/CN2022/096875
Authority: WO
Inventors: 厉刚; 刘科; 李赫亮; 张放军
Original assignee: 北京君立康生物科技有限公司
Priority date: 2021-06-03
Filing date: 2022-06-02
Publication date: 2022-12-08
Also published as: CN113353307B; CN113353307A

Abstract

A material split charging device. A dish oscillation mechanism is added, a smooth arc-shaped motion of a horizontal plane of a dish bottom is realized, oscillation and uniform shaking of a material in the dish bottom are realized, the decrease of bubbles in a culture medium is facilitated, sufficient mixing of the culture medium and a substance to be tested is promoted, and a condition for the implementation of the function of a dish pouring method is provided.

Description

Material packing equipment

technical field

The invention relates to the fields of microbial research, medical equipment, food and drug testing, chemical industry, clinical testing, disease control, etc., and in particular relates to a material packaging device.

Background technique

In food and drug testing, it is often necessary to add medium to the petri dish for microbial culture experiments. In an experimental sequence, it is often necessary to do dozens of sample gradient sequences. Doing it manually is not only time-consuming, labor-intensive and costly, but also has a high risk of contamination of the culture medium, making it difficult to guarantee the quality of the packaging.

In the prior art, some devices for automatically distributing culture media have been proposed. But in the process of realizing the present invention, the applicant finds that these devices have the following technical defects:

1. The fluidity of part of the culture medium is not good. After adding to the plate, it is difficult to ensure that the culture medium completely covers the bottom of the culture dish, resulting in waste products;

2. In some application scenarios, it is necessary to add the sample to be tested into the petri dish first, then add the culture medium and shake it to completely disperse the sample in the culture medium. The existing packaging equipment cannot meet this requirement;

3. In the field of food sample testing, it is necessary to subpackage the normal sample and the comparison sample. However, the traditional subpackage method is difficult to ensure the consistency of the medium addition in the normal sample and the comparison sample;

4. Since the subpackaging pipeline does not work continuously for a long time, and the culture medium in it is prone to solidification after a long period of storage, resulting in the failure of normal use of the subpackaged products;

5. The automatic dispensing equipment in the prior art can only manually separate the bottom of the dish from the lid, and then automatically repack the bottom of the dish, which leads to an increase in labor costs and increases the risk of pollution;

6. During the subpackaging process, there is still a risk of contamination of the culture medium and the substance to be tested.

Contents of the invention

(1) Technical problems to be solved

The present invention aims at at least partially solving at least one of the above technical problems.

(2) Technical solutions

In order to achieve the above object, the present invention provides a kind of material packing equipment, comprising: a main frame; a plate body translation mechanism, including: a plate body supporting plate, which is horizontally fixed in the main frame, defines a first station on it, and Formed through the dish supporting plate, N second station holes for longitudinal lifting of the bottom of the dish, N≥1; the pushing dish assembly is movably arranged on the dish supporting plate, used to move the dish body from the first working position The position is pushed to the position where the second station hole is located; the dish body lifting mechanism includes: N top plates arranged horizontally, which are concentrically arranged with the corresponding second station holes above; the lifting drive assembly is used to drive the N top plates Up and down movement; dish body oscillation mechanism, including: an oscillation plate, which is horizontally arranged under the dish body support plate, and N oscillation stations are formed on it; an oscillation drive component, connected with the oscillation plate, is used to drive the oscillation plate through its origin The position makes a smooth arc movement on the horizontal plane; among them, the second station hole, the top plate, and the oscillation station are set correspondingly, and the origin position refers to the center of the oscillation station and the corresponding second station hole and the center of the top plate on the horizontal plane. The position of the oscillating plate when the projection coincides.

(3) Beneficial effects

It can be seen from the above technical solutions that the present invention has at least one of the following beneficial effects:

(1) The dish body oscillation mechanism is added to realize the smooth arc movement of the horizontal plane at the bottom of the dish, and realize the oscillation and shaking of the material in the bottom of the dish, which is beneficial to reduce the air bubbles in the medium, and promote the medium and the substance to be tested to be fully Mixing provides conditions for the realization of the function of the plate pouring method.

(2) On the basis of the smooth arc movement of the horizontal plane of the bottom of the dish, the same sub-package pipeline is set to correspond to multiple oscillating stations and sub-package positions of the oscillating plate, and the same sub-package pipeline can be used to add materials to the bottom of multiple pans. The accuracy of adding materials to the comparison sample is improved, and the complexity of the equipment is reduced;

(3) An absolute encoder is used to locate the origin of the oscillating plate, so that the separated dish bottom can accurately fall into the oscillating station, and at the same time, the top plate can pass through the oscillating station and move upwards accurately.

(4) The oscillating plate is oscillated by using an eccentric shaft, with large oscillation amplitude and simple structure;

(5) Before dispensing, weigh the actual dispensing material volume, compare and calculate the set dispensing volume through the controller, and calibrate the dispensing volume to realize accurate injection of materials;

(6) During the packaging process, if the material in the packaging pipeline is cooled and solidified, or some materials are unusable, the part of the material can be automatically injected into a specific material container without manual operation to realize the waste recycling function. This structure provides conditions for the realization of the automation of the packaging process.

(7) Through the special design of the second station hole, combined with the control logic of the controller, the automatic separation of the bottom and the lid of the dish before packing is realized, and the automatic closing of the bottom and cover of the dish after packing is realized. The conditions are provided for the realization of the base aliquot packaging and dish pouring method;

(8) The air filter is used to maintain a positive pressure state of clean air inside the material packaging equipment, which is beneficial to reduce the risk of pollution during the material filling process; in addition, the bacteria in the space are sterilized by ultraviolet light.

(9) Lifting structure: This structure is driven by a motor and driven by a screw, and has a simple structure; the guide rod ensures stable lifting; the separation of the bottom of the plate and the cover of the plate is realized, providing conditions for the medium packaging and plate pouring method, and making the operation flexible.

(10) The plate pushing assembly is driven by a motor, driven by a rack and pinion, and has a simple structure; with a pair of linear guide rails, it can ensure the stability of the plate pushing process and the accurate positioning of the plate separation position.

Description of drawings

Fig. 1A, Fig. 1B, Fig. 1C, and Fig. 1D are the perspective view of the general assembly, the front view of the general assembly, the left view of the general assembly and the right view of the general assembly, respectively, of the culture medium dispensing equipment of this embodiment.

Fig. 2 is a perspective view of a hollow dish stacking rack according to an embodiment of the present invention.

Fig. 3 is a perspective view of the finished dish stacking rack in the embodiment of the present invention.

Fig. 4A, Fig. 4B and Fig. 4C are respectively a perspective view, a front view and a left side view of the pan body translation mechanism in the embodiment of the present invention.

Fig. 5A, Fig. 5B, Fig. 5C and Fig. 5D are respectively a perspective view, a front view, a left view and a top view of the plate lifting device in the embodiment of the present invention.

Fig. 6A, Fig. 6B and Fig. 6C are respectively a perspective view, a front view and a left side view of the dish oscillation mechanism in this embodiment.

FIG. 6D and FIG. 6E are respectively top views of the oscillating plate in the first dispensing position and the second dispensing position in the dish oscillating mechanism in this embodiment.

Fig. 7A, Fig. 7B, Fig. 7C, Fig. 7D, and Fig. 7E are respectively the perspective view of the first angle, the perspective view of the second angle, the front view, the right side view and the top view of the weighing calibration and waste recovery mechanism in the embodiment of the present invention.

Fig. 8A, Fig. 8B, Fig. 8C, and Fig. 8D are respectively a perspective view, a view from outside to inside, a view from inside to outside, and a cross-sectional view of the air filter in the embodiment of the present invention.

Detailed ways

The invention improves the traditional culture medium subpackaging equipment, can realize the mixing function while subpackaging, and provides conditions for realizing the function of the plate pouring method. In addition, the present invention also adds a weighing calibration and waste material recovery structure, a dish bottom/dish cover separation mechanism, etc. in the medium packing equipment, which increases the automation level of the medium packing.

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

In an exemplary embodiment of the present invention, a medium filling device is provided.

It should be clear to those skilled in the art that for the added materials, in addition to the subpackage of the medium in this embodiment, the technical solution of the present invention can also be applied to the fields of medical equipment, food and drug testing, chemical industry, disease control, etc. The sub-packaging of small and medium-sized materials will not be repeated here. In addition, for the container containing materials, in addition to the flat dish of this embodiment, the technical solution of the present invention can also be applied to other dishes or dish-like containers, which will not be repeated here.

Fig. 1A, Fig. 1B, Fig. 1C, and Fig. 1D are the perspective view of the general assembly, the front view of the general assembly, the left view of the general assembly and the right view of the general assembly, respectively, of the culture medium dispensing equipment of this embodiment. Please refer to Fig. 1A ~ Fig. 1D, the medium packaging equipment of this embodiment includes:

The main frame 110 forms a relatively closed space inside it;

Empty dish stacking rack 120 is arranged on the main frame 110, which provides four stacks of empty dish stacking space;

The finished dish stacking rack 130 is arranged on the main frame 110, which provides four stacks of finished dish stacking space;

The dish body translation mechanism includes: dish body supporting plate 210, which is horizontally fixed on the main frame, defines four first stations on it, and forms four second stations that run through the dish body supporting plate and vertically lift the bottom of the dish. Station holes; among them, the four first stations are aligned with the stacking spaces of the four stacks of empty dishes on the empty dish stacking rack above, and the four second station holes are aligned with the stacking spaces of the four stacks of finished dishes on the finished dish stacking rack above The dish pushing assembly 220 is movably arranged on the dish body supporting plate, and is used to push the dish body from the first station to the position where the second station hole is located;

The dish body lifting mechanism 300 includes: four top plates 310 arranged horizontally, concentrically arranged with the four second station holes above; a lifting drive assembly 320, used to drive the four top plates to move up and down;

The material filling mechanism includes: two one-to-two dispensing pipelines (411, 412); the filling pump 421 is connected to the two one-to-two dispensing pipelines for passing through the dispensing pipes Add material to the bottom of the dish in the oscillation station;

The dish body oscillating mechanism 500 includes: an oscillation plate 510, which is horizontally arranged between the dish body supporting plate and the four top plates, on which four oscillation stations are formed; the oscillation drive assembly is connected with the oscillation plate for driving the oscillation The board passes through its origin position to make a smooth arc motion on the horizontal plane;

Weighing calibration and waste material recovery mechanism, used to realize waste material recovery and/or calibration of material filling amount;

The cleaning mechanism includes: an air filter 710, which is fixed on the baffle, and is used to introduce the external air into a relatively closed space after filtering, so that the relatively closed space presents a positive pressure state relative to the external atmospheric pressure; an ultraviolet lamp 721, which is arranged near The location of the dispensing line.

For the medium packing equipment of this embodiment, the empty dishes A (including the dish bottom A1 and the dish cover A2) are stacked in the empty dish stacking space. After the equipment runs, the empty dishes automatically enter the equipment in sequence to complete the dish bottom , the separation of the dish cover, the injection of the medium, the oscillation and mixing of the medium, the closing of the bottom of the dish and the cover of the dish, and finally, the plate filled with the medium is pushed into the stacking space of the finished dish. The mixing function provides conditions for the realization of the plate pouring method.

At the same time, in this embodiment, the empty dish stacking space, the first station, the second station hole, the top plate, the oscillation station, etc. are provided correspondingly. Specifically, the empty dish stacking space, the first station, the second station hole, the top plate, the oscillating station, and the finished dish stacking space have the same number, and satisfy a specific relationship in position, so that multiple dishes can be transferred at the same time , Separation and packaging, improve efficiency.

Those skilled in the art should understand that although N=4 is set in the present embodiment, that is, four empty dish stacking spaces are set, the first station, the second station hole, the top plate, the oscillation station, and the finished dish stacking space , but N can also take other values, for example, 1, 2, 3, 5, 6, 7, 8, etc. However, considering the subsequent one-to-two dispensing pipeline, N is preferably an even number.

It should be noted that, compared with the traditional technology, the medium subpackaging equipment shown in this embodiment mainly has the following five features, and for each of these five features, it has It is independent, that is, it can be independently applied to the medium dispensing equipment, even if the medium dispensing equipment does not contain other characteristic items in the above innovations:

1. The plate body oscillation mechanism is added. The plate body oscillation mechanism can realize the oscillation and shaking of the medium in the bottom of the plate, which is beneficial to reduce the air bubbles in the medium, promote the full mixing of the medium and the substance to be tested, and pour the medium into the plate. The realization of the legal function provides the conditions.

2. Set up one-to-many dispensing pipelines, that is, the same dispensing pipeline can be used to add materials to the bottom of multiple dishes, which improves the accuracy of material addition for comparison samples and reduces the complexity of the equipment.

3. Weighing calibration and waste recovery mechanism are added, specifically, the material container is added. Before the formal packaging, a preset amount of culture medium is injected into the material container through the packaging pipeline, so as to control the filling volume. calibration. In addition, during the packaging process, when encountering expired materials, they are discharged into the material container, thereby realizing the recycling function of waste materials, thereby overcoming the traditional technology that the packaging can only be carried out all the time, and the culture medium has to be solidified. Continuing with the predicament of subpackaging.

4. Combined with the design and control logic of the second station hole, the dish cover stays in place, and the dish bottom vibrates to realize the automatic separation of the dish bottom and dish cover before the medium is filled, and the dish bottom and dish are separated after the medium is filled. The closing of the cover greatly improves the automation level of the equipment, and provides conditions for the realization of the culture medium subpackage and dish pouring method. At the same time, the exposure time of the culture medium to the external environment is minimized, reducing the risk of contamination.

5. The positive pressure state of clean air is maintained inside the material dispensing equipment through the air filter, that is, the inside of the material dispensing equipment is always in a state of overflowing clean air, and the dirty air from the outside has no chance to enter, which is beneficial to reduce material filling risk of contamination in the process.

Of course, in addition to the features of the above five aspects, there are several differences from the conventional technology, which will be described in detail below.

Each component of the medium distribution equipment of this embodiment will be described in detail below. The features as above will become clearer in the detailed description of each component.

1. Frame and baffle

Please refer to FIG. 1A to FIG. 1D , the frame 110 encloses the overall structure of the culture medium dispensing equipment. In the overall structure, the main body is roughly in the shape of a cuboid, and an empty dish stacking rack 120 and a finished dish stacking rack 130 are arranged above. The body is divided into two parts with a certain height difference. The first part includes: dish body supporting plate 210, dish pushing assembly 220, dish body lifting mechanism 300 and so on. The second part is separated from the first part by a certain distance, and is slightly lower than the first part. Syringe pump 420 etc. The oscillating plate 510 is located at the first part during the up and down movement of the bottom of the dish, and moves in a circumferential direction between the first part and the second part during the smooth arc motion of the horizontal plane driven by the oscillating drive device.

The periphery of the frame 110 is closed by baffles. In the drawings of this embodiment, in order to clearly understand the internal relationship of each internal component, the baffle part is omitted. By setting the baffle, a relatively closed space is formed inside the frame. Subsequently, a positive pressure state will be formed in this relatively closed space to prevent dust particles in the outside air from contaminating the culture medium.

2. Empty dish stacking rack

Fig. 2 is a perspective view of a hollow dish stacking rack according to an embodiment of the present invention. Please refer to FIGS. 1A-1D and FIG. 2 , the empty dish stacking rack 120 includes: an upper guide plate 121 , a lower guide plate 122 and four empty dish stacking spaces defined by columns 123 . Each empty dish stacking space is limited by four columns, and the upper and lower ends of the four columns are respectively fixed on the upper guide plate and the lower guide plate. The upper guide plate 121 provides dish access for four empty dish stacking spaces. The lower guide plate 122 provides dish exit for four empty dish stacking spaces. The four dish outlets of the lower guide plate 122 are aligned with the four first stations on the dish body supporting plate below the baffle plate.

In this embodiment, the baffle above the main frame is provided with holes connecting the four dish outlets of the empty dish stacking frame and the four first stations on the lower dish body supporting plate. The empty dish stacking rack 120 is arranged on the baffle above the main frame 110, and it can also be taken off from the baffle. In actual use, the empty dishes are pre-stacked in the empty dish stacking rack, and the columns can ensure the controlled alignment of the stack, and then the empty dish stacking rack is fixed on the baffle. After the equipment is started, the empty dish will fall into the first station under the action of gravity under the condition of leaving a space below, and it will be pushed into the hole of the second station by the pushing dish assembly.

In this embodiment, the separation mechanism of the dish bottom and the dish cover is specially designed, so the dish A loaded into the empty dish stacking rack includes both the dish bottom A1 and the dish cover A2. Plates are capped before entering the media filling equipment, thereby reducing the risk of contamination of the plates.

3. Finished dish stacking rack

Fig. 3 is a perspective view of the finished dish stacking rack in the embodiment of the present invention. Please refer to Fig. 1A ~ Fig. 1D, Fig. 3, the finished dish stacking rack 130 is similar to the empty dish stacking rack, including: upper guide plate 131; lower guide plate 132; 16 columns 133. A group of 4 of the 16 columns defines a space for stacking finished dishes. The upper guide plate 131 provides dish outlets for four finished dish stacking spaces. The lower guide plate provides dish entry for four finished dish stacking spaces. The four dish inlets of the lower guide plate are aligned with the four second station holes on the dish body supporting plate 210 below the baffle plate.

On the front and rear sides of each dish inlet on the lower guide plate, there are baffles 134 that can be turned upside down under the action of external force. When the plate moves upward through the baffle under the action of the top plate, the baffle 134 is pushed away to enter the finished dish stacking space; then the top plate moves downward, and the plate is left in the finished dish stacking space under the action of the two baffles.

It should be noted that in this embodiment, the baffles on the same side of the four dish inlets are arranged along the long side of the lower guide plate, and the four baffles share the same rotating shaft 135, but each baffle can be turned over independently . Set in this way, when the four plates move upward together, force upward together. Compared with pushing the baffle at the entrance of the dish where each plate is pushed separately, the required force is smaller and it is easier to push the baffle. In addition, the structure of the baffle is simpler and easier to maintain.

In addition, handles 136 are provided on the left and right sides of the lower guide plate, so as to facilitate the removal of the finished dish stacking frame from the frame and the transfer of the petri dishes.

In this embodiment, the baffle above the main frame is provided with holes connecting the four dish inlets of the finished dish stacking rack and the four second station holes on the lower dish body supporting plate. The finished product stacking frame 130 is arranged on the baffle plate above the main frame 110. When the finished dish stacker is full of dishes, it can also be removed from the baffle.

In actual use, the empty finished dish stacking rack 130 is fixed on the baffle above the main frame, and the four dish inlets below it are aligned with the second station holes on the dish support plate below through the holes on the baffle. . After the equipment is started, the dish body loaded with materials and closed with the lid is lifted up by the top plate, passes through the upper baffle plate of the main frame, pushes away the baffle plate 134 of the dish inlet, enters the finished dish stacking space, and stacks them one by one rise. After the equipment is started, the finished dish stacking rack can be removed from the baffle for corresponding cultivation or other processing.

4. Pan body translation mechanism

Fig. 4A, Fig. 4B, Fig. 4C and Fig. 4D are respectively a perspective view, a front view, a left side view and a top view of the pan body translation mechanism in the embodiment of the present invention. Please refer to FIGS. 1A to 1D and FIGS. 4A to 4D , the dish body translation mechanism 200 includes: a dish body supporting plate 210 , a dish pushing assembly 220 , and a translation driving mechanism 230 .

The dish supporting plate 210 is horizontally fixed in the main frame, and the specific fixing method will be described later. Four first stations 211 are defined on the dish supporting plate, and four second station holes 212 are formed through the dish supporting plate for vertically lifting the bottom of the dish. Wherein, the first station hole 211 is aligned with the dish outlets of the four empty dish stacking spaces of the empty dish stacking rack above the frame. The second station hole 212 is aligned with the dish inlets of the four finished dish stacking spaces of the finished dish stacking rack above the frame.

The dish pushing assembly 220 is fixed on the dish supporting plate, and is used to push the dish from the first station 211 to the position where the second station hole 212 is located. The push dish assembly 220 includes: two slide rails 221, arranged on the dish body supporting plate, extending along the direction from the first station to the second station hole; push dish plate 222, installed on the slide rails through the slider , a rack 223 is provided on its side close to the dish body supporting plate, and the rack extends along the direction from the first station to the second station hole; the transmission gear 224 is fixed on the dish body supporting plate close to the push dish plate On one side, its outer teeth mesh with the outer teeth of the rack.

The translation drive mechanism 230 is used to drive the motion of the push dish assembly, including: push the dish drive motor 231, which is fixed on the main frame, and its output shaft is upward; the transmission shaft 232, which is connected downward to the output shaft of the push dish drive motor, Go up through the dish supporting plate; bearing seat 233, its outer ring is fixed on the side of the dish supporting plate away from the pushing dish plate, and its inner ring is sleeved on the outside of the transmission shaft to realize the positioning of the transmission shaft and the support of the dish supporting plate Positioning; the transmission shaft 232 passes through the dish body supporting plate and is connected to the axis of the transmission gear 224 .

In addition, the plate body translation mechanism also includes: front and rear limit switches (241, 242), which respectively limit the limit positions of the forward and backward movement of the push plate; four detection elements 243, used to detect four first stations Check whether there is a plate falling on the plate to control the packing action of the medium.

The controller is connected with the drive motor of the push plate and four detection elements, and is used to realize the following control logic:

In the initial state, the push plate 222 returns to the rear limit switch 242;

In the working state, the empty dish falls from the empty dish stacking rack to the first station 211 of the dish body supporting plate, the translation drive motor 230 is energized in the forward direction, and the transmission gear 225 is rotated through the transmission shaft 232 . The transmission gear 225 cooperates with the rack to drive the dish pushing plate 222 to push the empty dish from the first station 211 to the second station hole 212, which is the dish separation position. During the movement, the slide block and the dish pushing plate 222 are synchronized and move on the slide rail 221 to ensure that the dish pushing plate 222 moves linearly. Arriving at the second station hole, if a plate is detected at the position of the second station hole, the post-packing action of the plate will be driven. At the same time, the pusher plate touches the front limit switch, and the control logic makes the translation drive motor run in reverse, so that the pusher plate moves in the opposite direction, returns to the initial position, and touches the initial position limit switch.

It can be seen that under the control of the controller, the dish body translation mechanism realizes the function of pushing the plate from the first station to the second station hole.

Those skilled in the art should be able to understand that the number or arrangement of components such as slide rails, racks, limit switches, detection elements, and bearings can be adjusted according to actual scenarios. In addition, the above-mentioned push plate assembly and translational drive mechanism are only examples, and can also be adjusted to other types of push plate assembly and translation drive mechanism according to the needs of actual scenarios, as long as the plate can be pushed from the first station to the second station. The function of the bit hole is enough.

It should also be noted that the outer diameter of the second station hole 212 is larger than the outer diameter of the dish bottom and smaller than the outer diameter of the dish cover. And, on the plate body supporting plate, the outer side of the second station hole is formed with a semicircular groove for engaging the dish cover, which serves as a hard stop for the plate to move to the position of the second station hole. Such a special design of the second station hole will cooperate with the movement of the top plate to realize the separation and closure of the dish body and the dish cover, which will be described in detail below.

5. Lifting mechanism of dish body

Fig. 5A, Fig. 5B, Fig. 5C and Fig. 5D are respectively a perspective view, a front view, a left view and a top view of the plate lifting device in the embodiment of the present invention. Please refer to FIG. 1A-FIG. 1D and FIG. 5A-FIG. 5D , the dish lifting mechanism 300 includes: four top plates 311 and a lifting drive assembly.

The four top plates 311 are arranged horizontally corresponding to the four second station holes. Wherein, the radial size of the top plate 311 is slightly smaller than the size of the second station hole and the through hole inside the oscillating station, so that it can pass through the second station hole and the above-mentioned through hole.

The lifting drive assembly includes: two guide rods 321, fixed on the main frame, extending upward without interfering with other components; a lifting motor 322, fixed on the frame, and its output shaft is connected to the screw rod 323 upward; a lifting plate 324, whose Stretch out four support arms 325 upwards, connect corresponding top plate 311 respectively, the screw nut 326 is fixed on the position corresponding to the screw mandrel on its upper surface, and the linear bearing 327 is fixed on the position corresponding to the guide bar; Wherein, screw mandrel 323 and The screw nut 326 is matched, and the guide rod 321 is matched with the linear bearing 327 .

Here, it is necessary to emphasize the four height positions of the top plate in the longitudinal direction driven by the lifting mechanism of the dish body: at the upper limit height, the top plate pushes the petri dish into the finished dish stacking space; at the first height, the top plate and the dish The body supporting board is flush; at the second height, the top board is flush with the oscillating board; at the lower limit height, the top board is lower than the bottom surface of the oscillating board.

In addition, the dish lifting mechanism further includes: three limit switches 329 corresponding to the upper limit height, the first height and the lower limit height of the top plate respectively. In this embodiment, a limit switch bracket 328 is arranged vertically, and three limit switches are fixed on the limit switch bracket. Of course, the three limit switches can also adopt other fixed installation methods.

The controller is connected with the lifting motor 322 for realizing the following control logic:

1. In the initial state, the lifting plate 324 is in the middle position, the four top plates are located at the first height in the longitudinal direction, the four top plates 311 are flush with the upper surface of the plate pallet, and are located at the position of the second station hole, and the lifting plate touches the Corresponds to the limit switch of the first height.

2. When the empty petri dish moves to the position of the second station hole, the petri dish is placed on the top plate 311 . The lifting motor 322 is energized in reverse to drive the screw mandrel 323 to rotate. The threaded mandrel 323 cooperates with the threaded mandrel nut 326 to make the lifting plate 324 and the top plate 311 descend synchronously, so that the petri dish descends together.

Because the opening diameter of the second station hole 212 is larger than the bottom of the dish and smaller than the cover, the bottom of the dish can be moved down, but the cover of the dish remains on the tray, thereby realizing the separation of the cover and the bottom of the dish.

3. The top plate 311 passes through the second height during the movement. When the bottom of the dish falls to the limit hole of the oscillation plate, the bottom of the dish is engaged in the oscillation station of the oscillation plate and no longer falls, but the lifting plate 324 and the top plate continue to descend. Until the lifting plate touches the limit switch of the lower limit height, it stops at the lower limit height. The bottom of the dish and the top plate are separated, which makes it possible to realize the vibration function of subsequent dispensing.

4. When the bottom of the dish completes the subpackage oscillation, the drive motor is energized in the forward direction, so that the lifting plate 324 rises and drives the top plate 311 to rise from the lower limit height; at the second height position, the top plate 311 continues to rise after supporting the bottom of the dish; at the first height , the bottom of the dish matches the lid; then the top plate supports the plate and continues to rise, pushes away the baffle below the stacking space of the finished product, and pushes the plate into the finished product stacking rack. At this time, the top plate 311 is at the upper limit position and touches the corresponding upper limit position limit switch; then the top plate moves down to the first height.

And after the lifting plate 324 touches the upper limit position limit switch, it reversely descends to the initial state again, waiting for the next action.

Under the control of the controller, the lifting mechanism of the dish body realizes the separation of the dish body and the dish cover; the bottom of the dish is transferred from the position of the second station hole to the position of the oscillation station; Move upward from the position of the oscillating station, pass through the second station hole on the dish body support plate, close the lid, and the whole dish moves upward, passes through the baffle plate of the main frame, and the filled dish is pushed into Finished dish stacking space.

Those skilled in the art should be able to understand that the quantity or arrangement of components such as guide rods and limit switches can be adjusted according to the needs of actual scenarios. In addition, the lifting drive assembly above is only an example, and can also be adjusted to other types of lifting drive assemblies according to actual scenarios, as long as it can drive the top plate to move up and down.

In this embodiment, combined with the design and control logic of the second station hole, the automatic separation of the bottom and the lid of the dish is realized before the medium is packed, and the bottom and the lid of the dish are closed after the medium is packed, maximizing the The exposure time of the medium to the external environment is reduced, and the risk of contamination is reduced. At the same time, the automation level of the equipment has been greatly improved, which provides conditions for the realization of medium packaging and plate pouring.

6. Dish Oscillating Mechanism

Fig. 6A, Fig. 6B and Fig. 6C are respectively a perspective view, a front view and a left side view of the dish oscillation mechanism in this embodiment. FIG. 6D and FIG. 6E are respectively top views of the oscillating plate in the first dispensing position and the second dispensing position in the dish oscillating mechanism in this embodiment.

Please refer to Fig. 1A ~ Fig. 1D, Fig. 6A ~ Fig. 6E, dish body oscillating mechanism 500 comprises: oscillating plate 510, is horizontally arranged below the dish body supporting plate, is formed with four oscillating stations (511, 512, 513 , 514); the oscillating drive assembly is connected with the oscillating plate 510 and is used to drive the oscillating plate to move in a smooth arc on the horizontal plane, thereby driving the bottom of the dish at the vibrating station and the culture medium in it to oscillate.

Wherein, the oscillating

stations

511 and 512 are located on one side of the center line of the oscillating plate (as shown by the dotted lines in FIGS. 6D and 6E ), and the

oscillating stations

513 and 514 are located on the other side of the center line of the oscillating plate.

For the oscillating station 511, its inner side is provided with a through hole 511a for the top plate to move up and down, so as to realize the up and down delivery at the bottom of the dish.

Please continue to refer to FIG. 1A-FIG. 1D and FIG. 6A-FIG. 6E. The oscillation driving assembly includes: a driving part; and two driven parts, which are symmetrically arranged relative to the driving part.

The active part includes: a first fixed frame 521, which is fixed to the main frame, and which forms a first installation plane along the horizontal plane; a torque output component, which outputs torque rotating on the horizontal plane; an active eccentric shaft 522, whose driving end is rotatable It is connected to the torque output part, and the axis of the driving end does not coincide with the axis of the output torque of the torque output part, and its free end is rotatably connected to the oscillating plate; wherein, the torque output part drives the active eccentric shaft 522 to rotate, and then drives the oscillating plate 510 Make a smooth arc motion in the horizontal plane.

The torque output part includes: an oscillating motor 523, fixed on the first side of the first installation plane, and its torque output shaft passes through the first installation plane; a first gear 524, installed on the second side of the first installation plane, and its center is connected to To the torque output shaft of the oscillating motor; the second gear 525 is installed on the second side of the first installation plane, its external teeth mesh with the external teeth of the first gear, and its center is connected to the detection shaft of the position encoder; active eccentric The driving end of the shaft is connected to the second gear, and the axis of the driving end and the axis of the second gear are mutually staggered. Wherein, the oscillation motor is a stepping drive motor.

The driven part includes: column 531, fixed longitudinally on the frame; bearing housing 532, fixed on the top of the column; bearing 533, one of its inner ring and outer ring is fixed on the bearing housing; driven eccentric shaft 534, its driving end It is rotatably connected to the other one of the inner ring and the outer ring of the bearing, and the axis of the driving end does not coincide with the central axis of the bearing, and its free end is rotatably connected to the oscillation plate 510 .

Through the above active part and two driven parts, driven by the oscillating motor, the oscillating plate can move in a circular motion along the horizontal plane, so as to realize the oscillating and mixing of the culture medium therein.

The controller is connected with the oscillating motor 523 for controlling the smooth arc motion of the oscillating plate horizontal plane.

For the oscillating plate, there are three key positions in the smooth arc motion of the horizontal plane: the origin position, the first dispensing position, and the second dispensing position. The following describes the origin position. The origin position refers to the position of the oscillating plate when the center of the oscillating station coincides with the projection of the corresponding second station hole and the center of the top plate on the horizontal plane.

It can be understood that when the dish supporting plate is stationary relative to the main frame, the position of the second station hole in the horizontal plane and the height direction are all constant, therefore, the projected position of the center of the second station hole on the horizontal plane is unchanged of. The roof moves up and down in the height direction, but its projection on the horizontal plane remains unchanged, so the projection position of the center of the roof on the horizontal plane also remains unchanged. The oscillating station moves in a smooth arc along the horizontal plane with the oscillating plate, and its projection on the horizontal plane also moves. Therefore, it is defined that when the center of the oscillating station coincides with the projection of the center of the corresponding second station hole and the top plate on the horizontal plane, the position of the oscillating plate is the origin position.

When the oscillating plate is at the origin position, the top plate can move from bottom to top and pass through the through hole inside the oscillating station and the second station hole in turn; similarly, the top plate can move from top to bottom and pass through the second station in turn. Bit holes and through holes inside the oscillating station.

In the present invention, the accuracy of the position information of the oscillation plate is very important. If the position information of the oscillating plate is not accurate enough, it may occur: (1) The through hole inside the oscillating station is not aligned with the top plate, and the top plate cannot move upward through the through hole; (2) The bottom of the oscillating station is not aligned with the distribution pipe , so that the culture medium cannot be accurately injected into the bottom of the dish.

Therefore, in this embodiment, the pan oscillating mechanism further includes: an absolute encoder 541 connected to the controller for detecting the position of the smooth arc motion of the oscillating plate on the horizontal plane. Using an absolute encoder to locate the origin of the oscillating plate can make the bottom of the separated dish fall into the oscillating station accurately, and at the same time, the top plate can pass through the oscillating station and move upwards accurately. Those skilled in the art can understand that, in addition to absolute encoders, other types of position encoders can also be used to realize this function.

Regarding the smooth arc motion of the horizontal plane, the following three points need to be explained:

1. The smooth arc motion on the horizontal plane is not necessarily a circular motion, and its motion trajectory can also be a closed curve with a coincident starting point and ending point such as an ellipse or a 90°-turned "8" shape. On the one hand, it can realize the oscillation of the culture medium Mix well. On the other hand, the rotation rate and the curvature of the movement corner should not be too high to prevent the culture medium from splashing out of the bottom of the dish.

2. The smooth arc movement of the horizontal plane passes through three key positions: the origin position, the first dispensing position, and the second dispensing position.

As for the other two key positions of the oscillating plate in the smooth arc motion of the horizontal plane: the first dispensing position and the second dispensing position, they will be described in detail below in conjunction with the material filling mechanism.

3. The above design of the active part and the driven part is just an example, and those skilled in the art can design the corresponding oscillation drive assembly according to the motion track to be realized, and will not repeat them here.

In this embodiment, the dish body oscillation mechanism is added to realize the smooth arc motion of the horizontal plane at the bottom of the dish, and realize the oscillation and shaking of the material in the bottom of the dish, which is beneficial to reduce the air bubbles in the culture medium, and promote the mixing of the culture medium and the material to be tested. The substances are fully mixed, which provides conditions for the realization of the function of the plate pouring method.

7. Material filling mechanism

In this embodiment, since the oscillating plate drives the bottom of the dish located at the oscillating station to move in a smooth arc on the horizontal plane, it is possible for the same dispensing pipeline to add medium to the bottom of multiple dishes.

Please continue to refer to Figure 1A ~ Figure 1D, Figure 6A ~ Figure 6E, the material filling mechanism includes:

Two one-to-two dispensing pipelines (411, 412);

The filling pump 421 can be connected with two dispensing pipelines at the same time, and is used to add material to the bottom of the dish in the oscillating station through the dispensing pipelines.

In this embodiment, in order to ensure the packaging accuracy, the filling pump 421 adopts a peristaltic pump.

The "one-to-two" in the above-mentioned "one-to-two dispensing pipeline" refers to that one dispensing pipeline can realize the filling of materials to the bottom of the dish in the two oscillating stations. "A pair of T" in other positions in the text refers to a dispensing pipeline that can realize the filling of materials to the bottom of the dish in T oscillation stations.

For the oscillating plate, it also has two dispensing positions on the trajectory of the smooth arc movement of the horizontal plane; For the tth oscillation station, t=1,2. In the actual movement, the dispensing pipeline is aligned with the bottom of the dish on the tth vibration station. The T vibrating stations that share the same subpackaging pipeline are located on the same side of the center line of the oscillation plate (as shown by the dotted lines in FIGS. 6D and 6E ).

It should be noted that the alignment here does not mean that the dispensing line is aligned with the center of the oscillation station, as long as it is aligned with a part of the oscillation station, the culture medium can be accurately injected when the dispensing line is dispensing the medium. The bottom of the dish is enough.

in particular:

1. Please refer to Figure 6D, the horizontal plane of the oscillating plate moves in a smooth arc to the first dispensing position, the dispensing pipeline 411 is aligned with the bottom of the dish on the oscillating station 511, and the dispensing pipeline 412 is aligned with the bottom of the dish on the oscillating station 513. Dish bottom. Control the filling pump 421 to add medium to the bottom of the dish in the shaking

stations

511 and 513.

2. Please refer to Figure 6E, the horizontal plane of the oscillating plate moves in a smooth arc to the second dispensing position, the dispensing pipeline 411 is aligned with the bottom of the dish on the oscillating station 512, and the dispensing pipeline 412 is aligned with the bottom of the oscillating station 514. Dish bottom. The filling pump 421 is controlled to fill the bottom of the dish in the shaking

stations

512 and 514 with culture medium.

For one of the dispensing pipelines 411, when the oscillating plate is at the first dispensing position, align with the dish bottom on the oscillating station 511; when the vibrating plate is at the second dispensing position, align with the vibrating station The bottom of the dish on the 512. For the other sub-packaging pipeline 412, when the oscillating plate is at the first sub-packaging position, align with the bottom of the dish on the oscillating station 513; The bottom of the dish on the 514. It can be seen that for one subpackaging pipeline, the corresponding two oscillation stations are on the same side of the center line of the oscillation plate.

The following introduces the movement of the pan oscillation mechanism and the material filling mechanism:

(1) The initial position, the oscillating station on the oscillating plate is concentric with the second station hole on the dish support plate, and the absolute encoder detects this position as the origin;

(2) The bottom of the dish falls to the oscillating station, and when the top plate is away from the oscillating plate, the oscillating motor is powered on to drive the active eccentric shaft to rotate. Because the axis of the motor and the axes of the two columns form a three-point stable structure, the active eccentric shaft rotates to drive the oscillating plate to swing in a circle. When the oscillating plate swings to the first dispensing position, the dispensing pipeline injects the material into the bottom of two of the dishes. Then the oscillating plate swings to the second dispensing position, and the dispensing pipeline injects the material into the bottom of the other two dishes to realize the dispensing operation.

In addition, when the plate pouring operation is not required, the oscillating plate swings to the original position. When it is necessary to do the operation of pouring into the plate, the oscillating plate will continuously swing in a circle to fully mix the multiple materials in the bottom of the plate. After the mixing is completed, the oscillating plate returns to the original position. Wait for the next empty dish for the next operation.

Those skilled in the art understand that it is of great practical significance to add materials to the bottom of two pans through one dispensing pipeline. Taking food testing as an example, it is usually necessary to do parallel samples, that is, one is a simple medium, and the other is a food sample + medium. By comparing two parallel samples, the relevant parameters of food samples are analyzed, such as: the total number of bacterial colonies, the number of coliforms, etc. If each dispensing line corresponds to filling medium at the bottom of a dish, the difference in medium loading and composition may be caused by the difference in the pipeline.

In this embodiment, four flat plates are arranged in a row, and the same liquid to be tested is installed inside, two for the total number of colonies, and two for the count of coliforms. Two plates for the total number of colonies use one culture medium and share the same aliquot tube. Two plates for coliform counts use another medium and share the same aliquot line.

In this embodiment, the two dispensing pipelines are dispensing the same medium, so the same filling pump is used. However, in other embodiments of the present invention, multiple filling pumps may also be used. The present invention can also be realized by using a filling pump capable of simultaneously filling two culture media.

8. Weighing calibration and waste recycling mechanism

In this embodiment, since the oscillating plate drives the bottom of the dish at the oscillating station to move in a smooth arc on the horizontal plane, it is possible to discharge waste liquid and calibrate the filling volume.

Figure 7A, Figure 7B, Figure 7C, Figure 7D, Figure 7E are respectively the first angle perspective view, second angle perspective view, front view, right view and top view of the weighing calibration and waste recovery mechanism in the embodiment of the present invention. Please continue to refer to Fig. 1A ~ Fig. 1D, Fig. 7A ~ Fig. 7E, the weighing recovery mechanism 600 includes: a second fixing bracket 611, fixed on the main frame; two bottom brackets 621, respectively connected by corresponding weighing modules 631 to the second fixed frame; two weighing modules 631, used to measure the actual subpackage amount added to the material container; two weighing transmitters 641, used to obtain the actual subpackage volume obtained by the two weighing modules The quantity information is transmitted to the controller; the two material containers 651 remain relatively stationary with the frame, and their top surfaces are lower than the position of the oscillating plate, and each material container is aligned with the corresponding dispensing pipeline above.

Each component of the weighing calibration and waste recycling mechanism will be described in detail below.

In this embodiment, an additional material container is added. The material container has two functions, specifically:

1. Taking agar as the medium as an example, during the operation of the equipment, there may be coagulated agar gel in the dispensing pipeline. Even if the agar gel melts here, it will affect the experimental results, so this part of the agar gel needs to be discharged. In this embodiment, the remelted agar is discharged to the material container.

Through such arrangement, it is overcome in the prior art that the remelted agar gel is discharged into the petri dish, which causes waste of the petri dish.

2. Before the dispensing starts, the accuracy of the dispensing is adjusted according to the actual dispensing volume of the dispensing pipeline, which is to weigh through the weighing module, and then the controller converts it into volume to adjust the dispensing volume .

With such setting, precise control of the filling volume can be realized, which overcomes the defect that the filling volume cannot be accurately controlled in the traditional technology.

In order to ensure that the culture medium is not polluted and at the same time prevent the contaminated material container from polluting the internal environment of the equipment, the material container is a disposable container, specifically a disposable plastic cup.

When it needs to be explained, the controller will confirm whether waste liquid discharge or weighing measurement can be performed according to the position information of the oscillating plate acquired by the absolute encoder. Specifically: during the horizontal smooth arc movement of the oscillating plate, it will move to a rear position far away from the first dispensing position and the second dispensing position, such as the origin position. In this case, the dispensing pipeline The culture medium will be injected into the material container.

The following describes the operation status of weighing calibration and waste recycling mechanism:

(1) In the initial state, the material container is empty and placed on the bottom support.

(2) Before dispensing, the peristaltic pump needs to be calibrated. The dispensing volume of the peristaltic pump is set in advance, there is no plate on the oscillating plate, and it is at the origin. The peristaltic pump pumps the material into the material container. When the peristaltic pump stops automatically, the controller gets the weight value. Then automatically compare the preset dispensing volume with the actual dispensing volume, calculate the error, and calibrate the peristaltic pump flow.

(3) During the subpackaging process, if there is solidified material or useless material in the subpackaging pipeline, the material will be pumped into the waste recycling device. When the weight reaches the maximum capacity of the container, the control system will alarm and the container needs to be replaced.

In this embodiment, through the weighing calibration and waste recycling mechanism, the subpackage of the plate is fully automated, and no manual operation of waste is required.

9. Cleaning organization

In this embodiment, through the unique bottom cover separation and bottom cover design of the plate, the contact time between the culture medium and the outside world is reduced as much as possible. In addition, this embodiment also uses positive pressure design and ultraviolet disinfection to minimize The chance of medium contamination is reduced.

1. Positive pressure cleaning

In this embodiment, the periphery of the main frame is closed by the baffle, forming a relatively closed space inside it. In a relatively closed space, except for the plate channel of the baffle below the empty dish stacking rack/finished dish stacking rack, the connection between the filling pump and the supply side of the external petri dish is between the openings near the dispensing pipeline for easy observation of the dispensing situation. Other parts are closed.

Please refer to Fig. 1A ~ Fig. 1D, Fig. 8A ~ Fig. 8D. In this embodiment, the cleaning mechanism includes: an air filter 810, which is fixed on the baffle, and is used to introduce the outside air into a relatively closed space after filtering. , so that the relatively confined space presents a positive pressure state.

Please refer to Fig. 8A～Fig. 8D, the air filter 710 comprises: cylinder body 711, its periphery is fixed on the baffle plate along the circumference; Cylindrical filter element 712 is fixed in the cylinder body, forms an air circulation path between it and the cylinder body; The net 713 is set on the side of the cylindrical filter element facing the external space; the sealing plug 715 is plugged on the side of the cylindrical filter element away from the external space; the annular baffle 714 is blocked on the side of the cylindrical filter element facing the external space and the gap between the cylinder, the annular baffle and the sealing plug realize the positioning of the cylindrical filter element in the cylinder; the fan 716 is fixed on the side of the cylinder away from the external space, and it sucks air into the cylinder The air flow path between the shaped filter element and the cylinder.

Wherein, the annular baffle and the sealing plug fix the cylindrical filter element so that the cylindrical filter element and the cylinder body are concentric to ensure the air circulation path between the filter element and the cylinder body to allow air to flow.

In the figure, the direction of the arrow is the direction in which the air enters. Please refer to the drawings, in this embodiment, the fan 716 sucks the outside air into the enclosed space. The process is to first filter out larger dust particles in the air through the filter screen 713, and then enter the cylindrical filter element 712 for secondary filtration. After the air is filtered through the cylindrical filter element, clean air is formed and enters the interior of a relatively closed space. Because the air sucked by the fan has a certain pressure, the air entering the relatively closed space also forms a pressure. The air pressure inside the relatively closed space is greater than that outside, so that the air inside the relatively closed space continuously flows out to the outside. Ambient unclean air cannot enter the interior of the machine.

2. UV disinfection

Please refer to FIG. 1A-FIG. 1D and FIG. 8. In this embodiment, the cleaning mechanism includes: an ultraviolet lamp 821, which is set at the position of the dispensing pipeline. An ultraviolet lamp is installed in the subpackage position, which has the function of sterilization. During the packaging process, even if a small amount of external air enters the machine, the ultraviolet rays will kill the bacteria in the air, so that the packaging materials are always in a relatively sterile environment.

10. Controller

The control flow of the medium dispensing equipment of this embodiment will be described in detail below in combination with the above hardware.

1. Calibration of dispensing volume in the preparation stage

The controller executes the following control logic to calibrate the dispensing volume:

Step A1, controlling the filling pump to add materials according to the preset dispensing amount through the dispensing pipeline;

Step A2, receiving the information about the actual filling volume injected into the material container sent by the weighing module;

In step A3, the preset dispensing volume of the filling pump is calibrated according to the actual dispensing volume information.

2. Plate delivery in the official operation stage

Due to gravity, the lowermost flat dish in the empty dish stacking rack passes through the hole of the baffle plate and falls to the position of the first station on the dish body supporting plate.

The controller executes the following control logic to send the plate to the vibration station:

Step B0, ensuring that the oscillating plate is at the origin and the top plate is at the first height;

Step B1, controlling the push dish assembly to push the dish body from the first station to the position of the second station hole, and then retract the push dish assembly to the original position;

Step B2, controlling the lifting drive assembly to drive the top plate to move downward, the dish cover is left at the position of the second station hole, and the bottom of the dish is supported by the top plate to move downward;

Step B3, at the second height, the bottom of the dish is left at the vibrating station;

Step B4, control the top plate to continue to descend to the lower limit height.

3. Subpackage of the culture medium in the official operation stage

The controller is used to execute the following control logic to add culture medium to the bottoms of the four dishes of the four vibrating stations of the oscillating plate:

Step C1, controlling the smooth arc movement of the horizontal plane of the oscillating plate to the first dispensing position;

Step C2, controlling the filling pump to add material to the bottom of the dish in the first oscillating station;

Step C3, controlling the smooth arc movement of the horizontal plane of the oscillating plate to the second dispensing position;

Step C4, controlling the filling pump to add material to the bottom of the dish in the second oscillating station.

4. Medium mixing and shaking in the official operation stage

The controller executes the following control logic to realize the oscillating mixing of the media in the bottom of the four dishes:

Step D1, controlling the oscillating plate to move in a continuous horizontal smooth arc;

Step D2, controlling the oscillating plate to stop moving, and the stop position is at the origin position.

5. The finished dishes in the official operation stage are sent back

The controller executes the following control logic to realize the closing of the bottom and the lid of the dish, and the homing of the plate in the finished dish stacking rack:

Step E1, control the lifting drive assembly to drive the top plate to move upward, lift the bottom of the dish in the oscillation station at the second height and continue upward, and leave the bottom of the dish and the hole of the second station at the first height The lids of the dishes are closed;

Step E2, controlling the lifting drive assembly to drive the top plate to continue to move upward, the top plate pushes the plate to continue to move upward, pushes the baffle plate of the finished dish stacking rack, and pushes the plate into the finished dish stacking space, at this time, the top plate is at the upper limit position;

Step E3, controlling the lifting drive assembly to drive the top plate to move downward, and the petri dish remains in the finished dish stacking rack;

Step E4, controlling the lifting drive assembly to drive the top board to move downwards, so that the top board stops at the first height.

6. Waste discharge in the official operation stage

During the subpackaging process, if there is solidified material or useless material in the subpackaging pipeline, the controller is used to execute the following control logic to discharge the waste:

Step F0, when it is judged that there is waste in the dispensing pipeline, it is determined that the oscillating plate moves to a rear position away from the first dispensing position and the second dispensing position, such as the origin position;

Step F1, controlling the filling pump to discharge the waste material to the material container corresponding to the dispensing pipeline.

7. Positive pressure cleaning in the official operation stage

During the packaging process, the controller is used to execute the following control logic to achieve positive pressure cleaning of relatively sealed spaces:

Step G, open the air filter 810 to introduce clean air into a relatively closed space to form a positive pressure;

Step H, turn on the ultraviolet lamp,

So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings.

It should be noted that, for some implementations, if they are not the key content of the present invention and are well known to those of ordinary skill in the art, they are not described in detail in the accompanying drawings or in the text of the specification. It can be understood with reference to relevant prior art.

In addition, the above definition of each element is not limited to the various specific structures and shapes mentioned in the embodiments, and those skilled in the art can easily modify or replace them, for example:

(1) The path of the oscillating plate can also adopt other forms of smooth arc movement on the horizontal plane than the form described in the embodiment.

(2) translation drive assembly, lifting drive assembly, oscillation drive assembly, etc. can also adopt other forms that those skilled in the art can think of;

(3) In addition to adopting a subpackage pipeline described in the embodiment to add material to the petri dish of two oscillating stations, it can also be a subpackage pipeline only to add material to a petri dish of one oscillating station; it is also possible It is a sub-packaging pipeline for adding materials to plates with three or four oscillating stations.

Based on the above description, those skilled in the art should have a clear understanding of the present invention.

To sum up, the material dispensing equipment of the present invention can simultaneously transfer, separate and distribute multiple plates to improve efficiency; the lid and the bottom of the plate can be separated, reducing the probability of contamination; the plate body oscillation mechanism is the function of the plate pouring method Realize the provision of conditions; the internal space of the equipment realizes positive pressure and ultraviolet sterilization to ensure a sterile environment during the packaging process; adding weighing calibration and waste recycling mechanisms to fully realize the automation process.

It should also be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", "inside", "outside" and so on, only It is the direction of referring to the accompanying drawings, and is not used to limit the protection scope of the present invention. Throughout the drawings, the same elements are indicated by the same or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention. And the shape and size of each component in the figure do not reflect the actual size and proportion, but only illustrate the content of the embodiment of the present invention. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in specific situations.

The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The ordinal numbers used in the specification and claims, such as "first", "second", "third", "main", "secondary", as well as Arabic numerals, letters, etc., are used to modify corresponding elements or steps. It is only used to clearly distinguish an element with a certain designation from another element with the same designation, and does not imply that the element has any ordinal number, nor does it represent the order of an element with another element.

The specific embodiments described above have described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims

A kind of material packing equipment, it is characterized in that, comprises:

main frame;

The dish body translation mechanism includes: a dish body supporting plate, which is horizontally fixed in the main frame, defines a first station on it, and forms N number of vertical lifts for the bottom of the dish body to go through the dish body supporting plate. Two station holes, N≥1; the push dish assembly is movably arranged on the dish body support plate, and is used to push the dish body from the first station to the position where the second station hole is located;

The dish body lifting mechanism includes: N top plates arranged horizontally, respectively arranged concentrically with the corresponding second station holes above; a lifting drive assembly, used to drive the N top plates to move up and down;

The pan oscillating mechanism includes: an oscillating plate, horizontally arranged below the pan supporting plate, on which N oscillating stations are formed; an oscillating drive assembly, connected with the oscillating plate, used to drive the oscillating plate Make a smooth arc motion on the horizontal plane through its origin position;

Material filling mechanism; the material filling mechanism includes: at least one pair of T dispensing pipelines, 2≤T≤N; wherein, the oscillating plate also has T dispensing positions; when the horizontal plane of the oscillating plate moves in a smooth arc to the t-th dispensing position, the dispensing pipeline is aligned with the t-th oscillating station, t=1, 2, ..., T; The T oscillating stations sharing the same sub-packaging pipeline are located on the same side of the center line of the oscillating plate;

Wherein, the second station hole, the top plate, and the oscillating station are set correspondingly, and the origin position means that the center of the oscillating station coincides with the projection of the center of the corresponding second station hole and the top plate on the horizontal plane , the position of the oscillating plate.
The material packaging equipment according to claim 1, characterized in that T=2;

The material filling mechanism includes: N/2 one-to-two dispensing pipelines; a filling pump connected to the N/2 one-to-two dispensing pipelines for passing through the dispensing The pipeline is used to add materials to the bottom of the dish in the oscillation station;

The pan oscillating mechanism also includes: a position encoder connected to the controller for detecting the position of the smooth arc movement of the oscillating plate on the horizontal plane;

The material dispensing equipment also includes: a controller connected with the oscillating drive assembly, the position encoder and the filling pump, and used to execute the following control logic:

Controlling the smooth arc movement of the horizontal plane of the oscillating plate to the first dispensing position;

controlling the filling pump to add material to the bottom of the dish in the first oscillation station;

Controlling the smooth arc movement of the horizontal plane of the oscillating plate to the second dispensing position;

controlling the filling pump to add material to the bottom of the dish in the second oscillating station;

The oscillating plate is controlled to move in a continuous horizontal smooth arc.
The material dispensing equipment according to claim 1, characterized in that, the oscillating drive assembly comprises: an active part; and two driven parts arranged left and right symmetrically with respect to the active part;

The active part includes: a torque output part, which outputs torque rotating on a horizontal plane; an active eccentric shaft, whose drive end is rotatably connected to the torque output part, and the axis of the drive end is connected to the torque output part to output torque The axes do not coincide, and its free end is rotatably connected to the oscillating plate; wherein, the torque output part drives the active eccentric shaft to rotate, and then drives the oscillating plate to move in a smooth arc on the horizontal plane;

The driven part includes: a column, fixed longitudinally on the frame; a bearing seat, fixed on the top of the column; a bearing, one of its inner ring and outer ring is fixed on the bearing seat; the driven an eccentric shaft, the drive end of which is rotatably connected to the other of the inner ring and the outer ring of the bearing, and the axis of the drive end does not coincide with the central axis of the bearing, and its free end is rotatably connected to the Oscillating plate.
The material dispensing equipment according to claim 3, characterized in that:

The active part further includes: a first fixing frame, fixed to the main frame, which forms a first installation plane along the horizontal direction;

The torque output component includes: an oscillating motor fixed on the first side of the first installation plane, the torque output shaft of which passes through the first installation plane; a first gear installed on the first side of the first installation plane The second side, the center of which is connected to the torque output shaft of the oscillating motor; the second gear is installed on the second side of the first installation plane, and its external teeth are meshed with the external teeth of the first gear. The center is connected to the detection shaft of the position encoder; wherein, the driving end of the active eccentric shaft is connected to the second gear, and the axis of the driving end and the axis of the second gear are mutually staggered.
The material dispensing equipment according to claim 2, further comprising:

N/2 material containers are kept relatively stationary with the frame, and their top surface is lower than the position of the oscillating plate, and each material container is aligned with the corresponding dispensing pipeline above.
The material packaging equipment according to claim 5, characterized in that:

The controller is also used to implement the following control logic: when it is judged that there is waste material in the dispensing pipeline, control the filling pump to discharge the waste material to the material container corresponding to the dispensing pipeline.
The material packaging equipment according to claim 5, characterized in that:

The material dispensing equipment also includes: N/2 weighing modules, which are arranged below the corresponding material container, and are used to measure the actual subpackage amount filled into the material container;

The controller is connected with the N/2 weighing modules and filling pumps, and is used to execute the following control logic:

Controlling the filling pump to add materials according to the preset dispensing amount through the dispensing pipeline;

Receive the information of the actual sub-package amount injected into the material container sent by the weighing module;

The preset dispensing volume of the filling pump is calibrated according to the actual dispensing volume information.
The material packaging equipment according to claim 7, further comprising:

the second fixing frame is fixed on the main frame;

N/2 bottom brackets are respectively connected to the second fixing frame through corresponding weighing modules, and are used to realize the support of corresponding material containers;

A weighing transmitter, used to transmit the actual dispensing volume information obtained by N/2 weighing modules to the controller;

Wherein, the material container is a disposable container.
The material packaging equipment according to claim 1, characterized in that:

The outer diameter of the second station hole is larger than the outer diameter of the bottom of the dish and smaller than the outer diameter of the lid;

On the dish supporting plate, a semicircular groove for engaging the dish cover is formed on the periphery of the second station hole.
The material packaging equipment according to claim 8, characterized in that:

The inner side of the oscillating station on the oscillating plate is provided with a through hole for the top plate to move up and down; in the longitudinal direction, the top plate has at least three successively lower height positions:

at a first height, the top plate is flush with the dish support plate;

at a second height, the top plate is flush with the oscillating plate;

At the lower limit height, the top plate is lower than the oscillating plate;

The controller is connected with the lifting drive assembly and the push pan assembly, and is used to execute the following control logic through both:

Before the step of controlling the smooth arc movement of the horizontal plane of the oscillating plate to the first dispensing position: ensure that the oscillating plate is at the origin position, and the top plate is at the first height; control the pushing dish assembly to move the dish body from the first station Push to the position of the second station hole, and then return the push dish assembly to the original position; control the lifting drive assembly to drive the top plate to move downward, the dish cover is left at the position of the second station hole, and the bottom of the dish is supported by the top plate Moving downwards, at the second height, the bottom of the dish is left at the vibration station; the control top plate continues to descend to the lower limit height;

After the step of controlling the oscillating plate to move in a continuous horizontal plane smooth arc: control the oscillating plate to return to the original position; control the lifting drive assembly to drive the top plate to move upward, and hold up the oscillating tool at the second height Continue upwards after the bottom of the dish in the station, and cover the bottom of the dish with the dish cover left in the hole of the second station at the first height.
The material dispensing equipment according to any one of claims 1 to 10, further comprising:

The empty dish stacking rack provides N stacks of empty dish stacking space, and the dish outlet below the empty dish stacking space of each stack is aligned with the corresponding first station on the dish body supporting plate;

The finished dish stacking rack is arranged above the main frame, which provides N stacks of finished dish stacking space, and the dish inlet below each stack of finished dish stacking space is aligned with the corresponding second station hole on the dish body supporting plate , and the inlet of the dish is provided with a one-way flip-up baffle;

Among them, the dish entrance of each finished dish stacking space is provided with one-way upturned baffles on both sides, and the baffles on the same side of the N dish entrances are arranged in sequence on the long side of the finished product stacking rack, sharing the same turning axis .
The material dispensing equipment according to any one of claims 1 to 10, characterized in that, the periphery of the main frame is closed by a baffle, forming a relatively closed space inside it;

The material dispensing equipment also includes: at least one air filter, fixed on the baffle plate, used to filter the outside air and suck it into the relatively closed space, so that the relatively closed space presents an air pressure relative to the outside atmospheric pressure. Positive pressure state.