CN209663477U - A kind of tea seeds screening plant - Google Patents

Abstract

The utility model provides a kind of tea seeds screening plant, it is related to technical field of agricultural mechanical equipment, solves the poor technical problem of tea seeds screening effect existing in the prior art, including rack, buoyancy screening plant is provided in the rack, sieve and Material collecting box for harvesting, the buoyancy screening plant includes sieve hopper, wherein: the liquid using buoyancy screening tea seeds is contained in the sieve hopper, the lower part of the sieve hopper is provided with and communicated with discharge gate, the lower section of the discharge gate is arranged in the sieve, the top of the Material collecting box for harvesting is arranged in the outlet end of the sieve, the sieve is drained into from the discharge gate with liquid after the tea seeds precipitating that quality is intact in the sieve hopper, tea seeds described in the screen to filtrate are simultaneously transported in the Material collecting box for harvesting；The utility model sieve hopper screens tea seeds using buoyancy, and screening effect is significant, on the one hand sieve filters and transport tea seeds, on the other hand makes liquid convenient for discharge, it is convenient to collect process.

Description

A kind of tea seeds screening plant

Technical field

The utility model relates to technical field of agricultural mechanical equipment, and in particular to a kind of tea seeds screening plant.

Background technique

Tea seed oil is by a kind of high-end xylophyta oil prepared by squeezing to tea seeds, in order to guarantee tealeaves The quality of seed oil, the raw material for first having to hold tea seeds close.The intact tea seeds quality of quality is larger, and does stir-frying, damage by worms, go mouldy The quality of equal tea seeds is smaller, screens the device of tea seeds currently on the market, and one kind is carried out using the volume of tea seeds itself Screening, the tea seeds that such device filters out often contain the bad tea seeds of qualities such as damage by worms, go mouldy, seriously affect tea seeds The quality and food safety of oil；It is another kind of, it is expensive large-scale screening installation, tea grower's purchase be cannot afford, and also not have park Institute.The utility model screens tea seeds by liquid buoyancy and corresponding corollary apparatus, and screening process is realized automatically substantially Change, solve the above problem, has reached satisfied screening effect.

A kind of screening plant for tea seed disclosed in Chinese patent document, the device include rack, roller, de-burring machine Structure and sieve mechanism, roller top are provided with feed hopper, and feed hopper and impurity removal mechanism junction are provided with guide roller, sieve mechanism Bottom end inside roller is set, sieve mechanism from the direction for being equipped with feed hopper be successively divided into empty grain sieve, middle grain sieve and Big seed sieve, guide roller transports tea seed during screening, successively passes through empty grain sieve, middle grain sieve and big seed sieve, The screening to tea seed is completed using the different bores of each sieve.

Applicant compares prior art discovery and at least there is following technical problem:

By the different bores of different sieves tea seeds are screened in the way of, can not filter out it is hollow, damage by worms, go mouldy Etc. the bad tea seeds of qualities, screening effect it is poor.

Utility model content

The purpose of the utility model is to provide a kind of tea seeds screening plants, to solve tea seeds existing in the prior art The poor technical problem of screening effect；What the optimal technical scheme in many technical solutions provided by the utility model can be generated Many technical effects (the first liquid circulation loop makes full use of liquid resource on the basis of transporting quality intact tea seeds, Improve screening effect；First liquid circulation loop reaches dynamic equilibrium, can guarantee the lasting progress of screening process；Second liquid Circulation loop further utilizes liquid resource on the basis of guaranteeing the tea seeds of transport inferior quality；Second liquid is recycled back to Road reaches dynamic equilibrium, can guarantee the lasting progress of evacuated process wastes；The transport of screen slope setting convenient tea leaf seed；It drives Dynamic device drives sieve vibration on the one hand to keep the transport of tea seeds more convenient, on the other hand liquid is promoted to flow out out of network interface； First sieve, which does straight line back and forth movement further, keeps the transport of tea seeds more convenient；First sieve and the second sieve do direction phase Anti- straight line back and forth movement utilizes the tea seeds categorised collection that volume is intact to quality；Filter Transmission device is by main shaft, cam machine Structure and link mechanism composition, mechanical mechanism is simple, at low cost, and screening effect is significant etc.)；Elaboration as detailed below.

To achieve the above object, the utility model provides following technical scheme:

A kind of tea seeds screening plant provided by the utility model, including rack are provided with buoyancy screening in the rack Device, sieve and Material collecting box for harvesting, the buoyancy screening plant include sieve hopper, in which: are contained in the sieve hopper and utilize buoyancy The liquid of tea seeds is screened, the lower part of the sieve hopper is provided with and communicated with discharge gate, and the discharge gate is arranged in the sieve The top of the Material collecting box for harvesting is arranged in lower section, the outlet end of the sieve, the intact tea seeds precipitating of quality in the sieve hopper The sieve is drained into from the discharge gate with liquid afterwards, tea seeds described in the screen to filtrate are simultaneously transported to the Material collecting box for harvesting It is interior.

Preferably, the buoyancy screening plant further includes liquid reserve tank, return pipe and the first power device, in which: the storage The lower section of the sieve is arranged in liquid case, and the both ends of the return pipe are connected with the liquid reserve tank and the sieve hopper respectively, liquid Body is under the action of first power device successively along the liquid reserve tank, the return pipe, the sieve hopper and the sieve Circulation forms the first liquid circulation loop.

Preferably, the position of the discharge gate is provided with first switch, is provided with valve on the return pipe, described in adjusting First switch and the valve are adjustable the flow of the discharge gate and the return pipe so that first liquid circulation loop Reach dynamic equilibrium.

Preferably, the buoyancy screening plant further includes ash can, and the top of the liquid reserve tank is arranged in the ash can And the bottom of the ash can, in netted, the upper position of the sieve hopper side wall is provided with waste material row's mouth, in which: liquid is in institute It states under the action of the first power device successively along the liquid reserve tank, the return pipe and the ash can circulation, forms the Two liquid circulation loops；The not intact tea seeds for swimming in liquid surface of quality are arranged with liquid from the waste material in the sieve hopper Mouth drains into the ash can, and the ash can filters and collects the endless good tea seeds of quality.

Preferably, the position of the discharge gate is provided with first switch, and valve, the waste material are provided on the return pipe The position of row's mouth is provided with second switch, adjusts the first switch, the second switch and the valve and is adjustable the row The flow of material mouth, the return pipe and waste material row's mouth is so that first liquid circulation loop and the second liquid follow Loop back path reaches dynamic equilibrium.

Preferably, the lower section of the discharge gate is arranged in the starting point of the sieve, and the outlet end setting of the sieve exists The top of the Material collecting box for harvesting, direction height of the sieve along the starting point to the outlet end successively reduce.

Preferably, driving device is provided in the rack, the driving device is connected with the sieve and can drive sieve Net vibration.

Preferably, the driving device includes the second power device and Filter Transmission device, and the sieve includes the first sieve Net, in which: first sieve is connected with the Filter Transmission device, the Filter Transmission device and second power device It is connected, second power device drives first sieve to do straight line back and forth movement by the Filter Transmission device.

Preferably, the sieve further includes the second sieve, in which: first sieve and second sieve are from top to bottom It sets gradually；Second sieve is connected with the Filter Transmission device, and second power device is passed through by stating Filter Transmission Device drives second sieve to do straight line back and forth movement, the direction of motion of first sieve and second sieve phase always Instead.

Preferably, the Filter Transmission device includes main shaft, cam mechanism and link mechanism, in which: the main shaft setting Between first sieve and second sieve；The both ends of the cam mechanism respectively with second power device and institute It states main shaft to be connected, the cam mechanism can be by the past wraparound for being converted into the main shaft of the second power device output end It is dynamic；The link mechanism is connected with the main shaft, and first sieve and second sieve are connected with the link mechanism, institute First sieve can be converted and second sieve direction is opposite always for the round-trip of the main shaft by stating link mechanism Straight line back and forth movement.

A kind of tea seeds screening plant provided by the utility model at least has following technical effect that

The buoyancy screening plant, the sieve and the Material collecting box for harvesting are arranged in the rack, and rack plays a supportive role, For screening operation carry out premise is provided；The buoyancy screening plant includes sieve hopper, is contained in the sieve hopper using floating Power screens the liquid of tea seeds, and tea seeds are screened in the sieve hopper；It is provided with discharge gate on the sieve hopper, it is described The lower section of the discharge gate is arranged in sieve, and the top of the Material collecting box for harvesting is arranged in the outlet end of the sieve, and quality is intact Tea seeds drain into sieve from discharge gate with liquid, and tea seeds are delivered to Material collecting box for harvesting after the screen to filtrate, liquid is then from the net of sieve Mouth outflow, the utility model sieve hopper screen tea seeds using buoyancy, and screening effect is significant, on the one hand sieve filters simultaneously Tea seeds are transported, on the other hand makes liquid convenient for discharge, keeps the collection process of tea seeds simple and effective.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the utility model structure diagram；

Fig. 2 is the utility model buoyancy screening plant structural schematic diagram；

Fig. 3 is the utility model sieve hopper construction schematic diagram；

Fig. 4 is the utility model sieve and a kind of embodiment schematic diagram of driving device；

Fig. 5 is the utility model sieve and driving device another embodiment schematic diagram.

Appended drawing reference

1- buoyancy screening plant；11- sieves hopper；111- second switch；112- waste material arranges mouth；113- first switch；114- Feed inlet；12- return pipe；13- liquid reserve tank；14- ash can；2- rack；3- Material collecting box for harvesting；4- sieve；The first sieve of 41-；42- Two sieves；5- driving device；The second power device of 51-；52- cam mechanism；521- eccentric rod；522- connecting rod；523- output Wheel；53- main shaft；54- link mechanism；541- drive connecting rod；542- follower link；55- vibrating shaft；56- eccentric shaft.

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work Obtained all other embodiment is put, the range that the utility model is protected is belonged to.

The utility model provides a kind of tea seeds screening plant, such as Fig. 1 the utility model structure diagram, Fig. 2 this reality Shown in novel buoyant screening plant structural schematic diagram and Fig. 3 the utility model sieve hopper construction schematic diagram, including rack 2, machine Buoyancy screening plant 1, sieve 4 and Material collecting box for harvesting 3 are provided on frame 2, buoyancy screening plant 1 includes sieve hopper 11, and rack 2 is set as Hierarchical structure, the setting of sieve hopper 11 is in top layer, and sieve 4 is arranged in middle level, and Material collecting box for harvesting 3 is arranged in lowest level, in which: sieve hopper The liquid using buoyancy screening tea seeds is contained in 11, the liquid can be set to the salt water of appropriate concentration, sieve hopper 11 Lower part be provided with and communicated with discharge gate 114, the lower section of discharge gate 114 is arranged in sieve 4, and the outlet end setting of sieve 4 is being gathered materials The top of case 3 sieves and drains into sieve 4,4 mistake of sieve from discharge gate 114 with liquid after the tea seeds that quality is intact in hopper 11 precipitate It filters the tea seeds and is transported in Material collecting box for harvesting 3.

When screening tea seeds, the liquid being contained in hopper 11 using buoyancy screening tea seeds is sieved, tea seeds are poured into It sieves in hopper 11, the intact tea seeds density of quality is larger to will do it precipitating, and the tea seeds after precipitating are with liquid from discharge gate 114 It flow on sieve 4, the tea seeds in liquid are filtered and be delivered in Material collecting box for harvesting 3 and stored by sieve 4, and liquid is then from sieve 4 Network interface in flow out；The utility model sieve hopper screens tea seeds using buoyancy, and screening effect is significant, and sieve is on the one hand Tea seeds are filtered and transported, on the other hand make liquid convenient for discharge, screening process is convenient.

Optionally embodiment, buoyancy screening plant 1 further include liquid reserve tank 13, return pipe 12 and the first power dress It sets, first power device is set as water pump or immersible pump, in which: the lower section of sieve 4, return pipe is arranged in liquid reserve tank 13 12 both ends are connected with liquid reserve tank 13 and sieve hopper 11 respectively, and one end of return pipe 12 is connected to the lower sidewall of liquid reserve tank 13, The other end be connected to sieve hopper 11 side wall upper part, liquid under the action of first power device successively along liquid reserve tank 13, Return pipe 12, sieve hopper 11 and 4 circulation of sieve, form the first liquid circulation loop；First liquid circulation loop will The intact tea seeds of quality are transported on sieve 4, and sieve 4 is delivered in Material collecting box for harvesting 3 in tea seeds, and liquid is then from the net of sieve 4 Mouth is flow in liquid reserve tank, on the one hand first liquid circulation loop has the function of transport, on the other hand can return liquid Receive recycling.

Optionally embodiment, the position of discharge gate 114 are provided with first switch 113, are provided on return pipe 12 Valve, adjusts first switch 113 and the valve is adjustable the flow of discharge gate 114 and return pipe 12 so that first liquid Circulation loop reaches dynamic equilibrium, and the first circulation circuit, which reaches dynamic equilibrium, can guarantee the lasting progress of screening process.

Optionally embodiment, buoyancy screening plant 1 further include ash can 14, and rack 2 is arranged in ash can 14 The entrance location of medial position, ash can 14 extends outwardly and forms prominent eaves, and ash can 14 rides upon rack 2 by prominent eaves On, facilitate the pick-and-place of ash can 14, it is in netted, sieve material that the top of liquid reserve tank 13 and the bottom of ash can 14, which is arranged in, in ash can 14 The upper position of 11 side walls of struggling against is provided with waste material row's mouth 112, in which: liquid successively edge under the action of first power device 14 circulation of liquid reserve tank 13, return pipe 12 and ash can forms second liquid circulation loop；It is not intact to sieve quality in hopper 11 The tea seeds for swimming in liquid surface drain into ash can 14 from waste material row's mouth 112 with liquid, and ash can 14 filters and collects quality Not intact tea seeds, the liquid in ash can 14 is flow in liquid reserve tank 13 from the network interface of 14 bottom of ash can at this time；Described On the one hand tea seeds bad to quality play the role of transport to two liquid circulation loops, on the other hand can withdrawal liquid, It allows the liquid to realize and recycle.

Optionally embodiment, the position of discharge gate 114 are provided with first switch 113, are provided on return pipe 12 The position of valve, waste material row's mouth 112 is provided with second switch 111, and second switch 111 is set as baffle, sieves the side wall of hopper 11 Upper position is equipped with opening, and the baffle can control the circulation area of the opening；Adjust first switch 113, second switch 111 and the valve be adjustable the discharge gate 114, return pipe 12 and waste material row mouth 112 flow so that first liquid Body circulation circuit and the second liquid circulation loop reach dynamic equilibrium；First liquid circulation loop and second liquid Body circulation circuit reaches dynamic equilibrium, can be realized screening process and waste discharge process while progress, imitates the screening of tea seeds Rate significantly improves.

The lower section of discharge gate 114 is arranged in optionally embodiment, the starting point of sieve 4, and the outlet end of sieve 4 is set It sets in the top of Material collecting box for harvesting 3, direction height of the sieve 4 along the starting point to the outlet end successively reduces；The inclination of sieve 4 is set The transport of convenient tea leaf seed is set, to prevent liquid from flowing into Material collecting box for harvesting 3, the tilt angle of sieve 4 is no more than 10 degree；Optionally, The top of liquid reserve tank 13 is arranged in Material collecting box for harvesting 3, and the bottom of Material collecting box for harvesting 3 is set as netted.

Optionally embodiment is provided with driving device 5 in rack 2, and driving device 5 is connected with sieve 4 and energy band Dynamic sieve 4 vibrates, on the one hand the vibration of sieve 4 can accelerate the transport of tea seeds, on the other hand liquid can be promoted to drain into storage In liquid case 13.

Optionally, as shown in Fig. 4 the utility model sieve and a kind of embodiment schematic diagram of driving device, driving device 5 Including vibrating shaft 55, eccentric shaft 56 and the second power device 51, vibrating mass, the vibration are provided with below the starting point of sieve 4 The bottom surface setting of motion block is fluted, and the position of the groove, which offsets, is provided with vibrating shaft 55, and the end bias of vibrating shaft 55 is set It is equipped with eccentric shaft 56, eccentric shaft 56 is connected with the second power device 51 and being rotated by second power device 51, Vibrating shaft 55 is matched with the groove, and when eccentric shaft 56 rotates, vibrating shaft 55 is rotated, and the starting point of sieve 4 vibrates up and down.

Optionally embodiment, such as Fig. 5 the utility model sieve and driving device another embodiment schematic diagram Shown, driving device 5 includes the second power device 51 and Filter Transmission device, and sieve 4 includes the first sieve 41, in which: first Sieve 41 is connected with the Filter Transmission device, and the Filter Transmission device is connected with the second power device 51, the second power dress Set 51 drives the first sieve 41 to do straight line back and forth movement by the Filter Transmission device, and 41 straight line back and forth movement of the first sieve exists Guarantee to keep the transport effect of tea seeds more significant on the basis of liquid is discharged in time.

Optionally embodiment, sieve 4 further include the second sieve 42, in which: the first sieve 41 and the second sieve 42 It sets gradually from top to bottom；Second sieve 42 is connected with the Filter Transmission device, and the second power device 51 is through by stating screening Transmission device drives the second sieve 42 to do straight line back and forth movement, the direction of motion of the first sieve 41 and the second sieve 42 phase always Instead, the network interface of the first sieve 41 is greater than the network interface of the second sieve 42, and the tea seeds after buoyancy screens pass through the first sieve 41 Secondary vibration screening is carried out with the second sieve 42, can be improved screening effect, while the intact tea seeds of quality can be classified Storage.

Optionally embodiment, the Filter Transmission device include main shaft 53, cam mechanism 52 and link mechanism 54, Wherein: main shaft 53 is arranged between the first sieve 41 and the second sieve 42；The both ends of cam mechanism 52 are filled with the second power respectively It sets 51 to be connected with main shaft 53, cam mechanism 52 can be by the past wraparound for being converted into main shaft 53 of 51 output end of the second power device It is dynamic；Link mechanism 54 is connected with main shaft 53, and the first sieve 41 and the second sieve 42 are connected with link mechanism 54,54 energy of link mechanism It converts the opposite always straight line back and forth movement of the first sieve 41 and 42 direction of the second sieve back and forth by main shaft 53；It is preferred that Ground, as shown in figure 5, cam mechanism 52 includes eccentric rod 521, connecting rod 522 and output wheel 523, output wheel 523 is arranged second It is rotated on the output end of power device 51 and with the output end, one end and the eccentric rotatably phase of output wheel 523 of eccentric rod 521 Even, the other end of eccentric rod 521 is rotatably connected with connecting rod 522, and connecting rod 522 is fixedly connected with main shaft 53, output wheel 523 Rotation can be converted into the round-trip rotation of main shaft 53 by the transmission of eccentric rod 521 and connecting rod 522；Link mechanism 54 includes master The both ends of dynamic connecting rod 541 and follower link 542, the first sieve 41 and the second sieve 42 are provided with drive connecting rod 541 and driven Connecting rod 542, drive connecting rod 541 are fixedly connected on main shaft 53, and follower link 542 is rotatably connected in rack 2, main shaft 53 Round-trip rotation can be converted into the round-trip of the first sieve 41 or the second sieve 42 by drive connecting rod 541 and follower link 542 Movement.

As optional embodiment, it is provided with power supply device in rack 2, the first power device and second can be stood alone as Power device 51 is powered, and the bottom of rack 2 is provided with wheel, facilitates the movement of the tea seeds screening plant entirety.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power Subject to the protection scope that benefit requires.

Claims (10)

1. a kind of tea seeds screening plant, which is characterized in that including rack (2), buoyancy screening dress is provided on the rack (2) (1), sieve (4) and Material collecting box for harvesting (3) are set, the buoyancy screening plant (1) includes sieve hopper (11), in which:

The liquid using buoyancy screening tea seeds is contained in sieve hopper (11), the lower part connection of sieve hopper (11) is set It is equipped with discharge gate (114), the sieve (4) is arranged in the lower section of the discharge gate (114), and the outlet end of the sieve (4) is set The top in the Material collecting box for harvesting (3) is set, with liquid from the row after the intact tea seeds precipitating of described sieve hopper (11) interior quality Material mouth (114) drains into the sieve (4), and the sieve (4) filters the tea seeds and is transported to the Material collecting box for harvesting (3) It is interior.

2. tea seeds screening plant according to claim 1, which is characterized in that the buoyancy screening plant (1) further includes Liquid reserve tank (13), return pipe (12) and the first power device, in which:

The liquid reserve tank (13) setting in the lower section of the sieve (4), the both ends of the return pipe (12) respectively with the liquid storage Case (13) is connected with the sieve hopper (11), and liquid is under the action of first power device successively along the liquid reserve tank (13), the return pipe (12), the sieve hopper (11) and the sieve (4) circulation form the first liquid circulation loop.

3. tea seeds screening plant according to claim 2, which is characterized in that the position of the discharge gate (114) is arranged Have first switch (113), is provided with valve on the return pipe (12), adjusts the first switch (113) and the valve energy The flow of the discharge gate (114) and the return pipe (12) is adjusted so that first liquid circulation loop reaches dynamic and puts down Weighing apparatus.

4. tea seeds screening plant according to claim 2, which is characterized in that the buoyancy screening plant (1) further includes Ash can (14), ash can (14) setting is in the top of the liquid reserve tank (13) and the bottom of the ash can (14) is in net The upper position of shape, described sieve hopper (11) side wall is provided with waste material row mouth (112), in which:

Liquid is under the action of first power device successively along the liquid reserve tank (13), the return pipe (12) and described useless Hopper (14) circulation forms second liquid circulation loop；

The not intact tea seeds for swimming in liquid surface of the interior quality of sieve hopper (11) arrange mouth (112) from the waste material with liquid It drains into the ash can (14), the ash can (14) filters and collects the endless good tea seeds of quality.

5. tea seeds screening plant according to claim 4, which is characterized in that the position of the discharge gate (114) is arranged Have first switch (113), valve is provided on the return pipe (12), the position of waste material row mouth (112) is provided with second It switchs (111), adjusts the first switch (113), the second switch (111) and the valve and be adjustable the discharge gate (114), the flow of the return pipe (12) and waste material row mouth (112) are so that first liquid circulation loop and described Second liquid circulation loop reaches dynamic equilibrium.

6. tea seeds screening plant according to claim 1, which is characterized in that the starting point setting of the sieve (4) exists The lower section of the discharge gate (114), direction height of the sieve (4) along the starting point to the outlet end successively reduce.

7. tea seeds screening plant according to claim 6, which is characterized in that be provided with driving dress on the rack (2) It sets (5), the driving device (5) is connected with the sieve (4) and sieve (4) can be driven to vibrate.

8. tea seeds screening plant according to claim 7, which is characterized in that the driving device (5) includes second dynamic Power device (51) and Filter Transmission device, the sieve (4) include the first sieve (41), in which:

First sieve (41) is connected with the Filter Transmission device, the Filter Transmission device and second power device (51) it is connected, it is past that second power device (51) by Filter Transmission device drive first sieve (41) does straight line Return movement.

9. tea seeds screening plant according to claim 8, which is characterized in that the sieve (4) further includes the second sieve Net (42), in which:

First sieve (41) and second sieve (42) are set gradually from top to bottom；

Second sieve (42) is connected with the Filter Transmission device, and second power device (51) passes through the screening Transmission device drives second sieve (42) to do straight line back and forth movement, first sieve (41) and second sieve (42) The direction of motion it is opposite always.

10. tea seeds screening plant according to claim 9, which is characterized in that the Filter Transmission device includes main shaft (53), cam mechanism (52) and link mechanism (54), in which:

The main shaft (53) is arranged between first sieve (41) and second sieve (42)；

The both ends of the cam mechanism (52) are connected with second power device (51) and the main shaft (53) respectively, described convex Wheel mechanism (52) can convert the rotation of the second power device (51) output end to the round-trip rotation of the main shaft (53)；

The link mechanism (54) is connected with the main shaft (53), first sieve (41) and second sieve (42) and institute It states link mechanism (54) to be connected, the link mechanism (54) can convert first sieve for the round-trip of the main shaft (53) The opposite always straight line back and forth movement of net (41) and second sieve (42) direction.