CN115591634B - Vertical medium grinds machine - Google Patents
Vertical medium grinds machine Download PDFInfo
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- CN115591634B CN115591634B CN202211251547.XA CN202211251547A CN115591634B CN 115591634 B CN115591634 B CN 115591634B CN 202211251547 A CN202211251547 A CN 202211251547A CN 115591634 B CN115591634 B CN 115591634B
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- 238000000227 grinding Methods 0.000 claims abstract description 142
- 230000001105 regulatory effect Effects 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 19
- 239000004744 fabric Substances 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims 3
- 238000009825 accumulation Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/04—Stationary flat screens
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The application discloses a media grinder, comprising: the grinding cylinder is provided with a grinding cavity, a feed inlet and a discharge outlet which are communicated with the grinding cavity; one end of the stirring mechanism extends into the grinding cavity and is used for stirring materials and grinding media in the grinding cavity; the feeding mechanism comprises a feeding pipe with one end communicated with the feeding port and a regulating valve arranged on the feeding pipe, and the regulating valve comprises a valve plate and a driving piece for driving the valve plate to move so as to control the feeding pipe to be opened and closed; the valve plate is a sieve plate provided with a feeding gap, and the width of the feeding gap is smaller than the diameter of the grinding medium. By the design, a feeding sieve plate is not required to be arranged at the feeding hole, when the feeding pipe stops feeding, the valve plate of the regulating valve is closed, and the valve plate can prevent grinding media from flowing back into the feeding pipe; when the inlet pipe feeds, the valve plate of the regulating valve is opened, and accumulated grinding media can be flushed into the grinding cavity under the drive of the materials, so that the accumulation of aggregates in the materials at the feed inlet is avoided, and the problem of uneven feeding is solved.
Description
Technical Field
The application relates to the technical field of grinding machines, in particular to a vertical medium grinding machine.
Background
In the production process of lithium battery slurry, a grinder is required to fully grind and disperse the slurry. The medium grinder is grinding and dispersing equipment with wide application range, and the grinding medium can be properly added and subtracted to adjust the fineness requirement due to the great differences of the material properties, fineness requirements and process conditions of different products. The high-efficiency grinding device is widely applied to high-efficiency grinding equipment in the industries of paint, dye, printing ink, pesticide, magnetic tape, papermaking, leather, chemical industry and the like, and has the advantages of simple structure, stable starting, high continuous production efficiency, convenient color change, easy cleaning, simple operation and the like.
In the existing vertical media grinder with lower inlet and upper outlet, a feed inlet is generally arranged at the lower end of a grinding cylinder for feeding, and in order to prevent grinding media from entering a feed pipeline, a feed screen is generally arranged at the feed inlet. The feed screen is opened there is the slot, and the width of slot is less than the diameter of grinding medium, and the material can get into the grinding vessel through the slot, and the medium in the grinding vessel can not pass through the slot. The material that has produces the reunion easily, and the size of reunion body is greater than the narrow slit width of feed sieve, and when the material passes through the feed sieve, the narrow slit that the reunion body can block at the feed sieve can't pass through, and the reunion body piles up and further reunion in feed sieve bottom, can reduce the overflow area of feed sieve, leads to the feed resistance increase, and the feed flow reduces, can totally block up the feed sieve when serious, influences later stage grinding efficiency and grinding effect.
Content of the application
Therefore, the application aims to overcome the defects that a material is easy to accumulate on a feed screen at a feed inlet of a medium grinder in the prior art, and the feed flow is influenced, so that the medium grinder is provided.
In order to solve the technical problems, the technical scheme of the application is as follows:
the medium grinder comprises a grinding cylinder and a stirring mechanism, wherein the grinding cylinder comprises a cylinder body with a grinding cavity, an upper end plate arranged at the upper end of the cylinder body and a lower end plate arranged at the lower end of the cylinder body; the barrel or the lower end plate is provided with a feed inlet, the upper end plate is provided with a discharge outlet, and the stirring mechanism comprises a stirring assembly which stretches into the grinding cavity to stir materials and grinding media in the grinding cavity;
the feeding mechanism comprises a feeding pipe with one end communicated with the feeding port and a regulating valve arranged on the feeding pipe, and the regulating valve comprises a valve plate and a driving piece for driving the valve plate to move so as to control the opening and closing of the feeding pipe; the valve plate is a sieve plate provided with a feeding gap, and the width of the feeding gap is smaller than the diameter of the grinding medium.
Further, the feed inlet is arranged at a position, close to the bottom, of the side edge of the grinding cylinder, and the feed direction of the feed pipe is arranged along the tangential direction of the inner wall of the grinding cylinder.
Further, the feeding holes are multiple, each feeding hole is communicated with one feeding pipe, and the feeding direction of each feeding pipe is arranged along the tangential direction of the inner wall of the grinding cylinder; the feeding pipes are uniformly arranged along the circumferential direction of the grinding cylinder.
Further, the feed inlet is arranged at the bottom of the grinding cylinder, and the feed direction of the feed pipe is arranged from bottom to top.
Further, the feeding gap on the valve plate is a round hole, a transverse slit hole, a vertical slit hole or a through hole with irregular appearance.
Further, the regulating valve is a pneumatic butterfly valve.
Further, the other end of the feeding pipe is connected with a feeding pump, and the feeding pump drives materials to enter the grinding cavity through the feeding pipe.
Further, a pressure gauge for detecting the internal pressure of the feeding pipe is arranged on the feeding pipe, the pressure gauge is electrically connected with a controller, the controller is electrically connected with the regulating valve, and when a pressure signal detected by the pressure gauge reaches a set threshold value, the controller controls the regulating valve to be opened.
Further, a first detection probe and a second detection probe, one end of which extends into the grinding cavity, are arranged on the side edge of the cylinder body, the first detection probe is used for detecting first impact frequency signals of the lower half area of the grinding cavity in real time, and the second detection probe is used for detecting second impact frequency signals of the upper half area of the grinding cavity in real time; the first detection probe and the second detection probe are electrically connected with the controller, and the controller adjusts the running speed of the feed pump according to whether the ratio of a first impact frequency value indicated by the first impact frequency signal to a second impact frequency value indicated by the second impact frequency signal obtained at the same time point is in a preset interval range or not, so that the feed flow of the grinder is adjusted.
Further, a top plate is arranged on the upper end plate, and the discharge port is arranged on the top plate; the stirring mechanism comprises a main shaft extending into the cylinder body and a rotor fixedly sleeved on the main shaft, and the stirring assembly is arranged on the periphery of the rotor; the upper portion of rotor is equipped with and is located the centre tank of upper end plate below, the below of upper end plate is equipped with and stretches into the ejection of compact screen cloth in the centre tank, ejection of compact screen cloth is the tube-shape, ejection of compact screen cloth with form annular gap between the rotor.
The technical scheme of the application has the following advantages:
1. according to the medium grinder provided by the application, the regulating valve is arranged on the feeding pipe communicated with the feeding hole of the grinding cylinder, the valve plate of the regulating valve is made of the sieve plate with the feeding gap, the width of the feeding gap is smaller than the diameter of the grinding medium, and meanwhile, the feeding sieve plate at the original feeding hole is omitted; when the feeding pipe stops feeding, the valve plate of the regulating valve is closed, and the valve plate can prevent grinding media from flowing back into the feeding pipe; when the inlet pipe feeds, the valve plate of the regulating valve is opened, and accumulated grinding media can be flushed into the grinding cavity under the drive of the materials, so that the accumulation of aggregates in the materials at the feed inlet is avoided, and the problem of uneven feeding is solved.
2. According to the medium grinder provided by the application, the feeding hole is arranged at the position of the side edge of the grinding cylinder close to the bottom, and the feeding direction of the feeding pipe is arranged along the tangential direction of the inner wall of the grinding cylinder, so that the movement direction of the material is the same as the movement direction of the original material in the grinding cylinder when the material enters the grinding cylinder, the consistency of the running direction of the material is ensured, and the uniformity of the distribution of the grinding medium in the material is improved.
3. According to the medium grinder provided by the application, the feeding directions of the feeding pipes are all arranged along the tangential direction of the inner wall of the grinding cylinder, and the feeding pipes are uniformly arranged along the circumferential direction of the grinding cylinder, so that the consistency of the running directions of materials can be further ensured, and the turbulence in the materials is reduced.
4. According to the medium grinder provided by the application, the pressure gauge is arranged on the feeding pipe, after the feeding pump is started, the pressure of the valve plate of the regulating valve close to one side of the feeding pump is gradually increased, when the pressure value detected by the pressure gauge reaches a set value, the controller automatically controls the starting of the regulating valve, the valve plate of the regulating valve is opened, and when feeding needs to be closed, the controller firstly controls the regulating valve to be closed and then controls the feeding pump to be closed, or the controller simultaneously controls the regulating valve and the feeding pump to be closed, so that automatic feeding of the grinder can be realized, and grinding media are prevented from entering the feeding pump through the feeding pipe.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the overall structure of a medium grinder according to a first embodiment of the present application;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
fig. 3 is a schematic view showing the overall structure of a vertical media mill according to a second embodiment of the present application.
Reference numerals illustrate: 100. a grinding cylinder; 101. a grinding chamber; 102. a feed inlet; 103. a discharge port; 104. a cylinder body, 105 and an upper end plate; 106. a lower end plate; 107. a top plate; 200. a stirring mechanism; 201. a main shaft; 202. a rotor; 203. a stirring assembly; 301. a feed pipe; 302. a regulating valve; 3021. a valve plate; 303. a pressure gauge; 4. and (5) discharging the screen.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
Example 1
A media mill as shown in fig. 1 and 2 includes a grinding drum 100, a stirring mechanism 200, and a feeding mechanism. Wherein, the grinding cylinder 100 is provided with a grinding cavity 101, a feed port 102 and a discharge port 103 which are communicated with the grinding cavity 101; one end of the stirring mechanism 200 extends into the grinding cavity 101 from the bottom of the grinding cylinder 100 and is used for stirring materials and grinding media in the grinding cavity 101; the feeding mechanism comprises a feeding pipe 301 with one end communicated with the feeding hole 102 and a regulating valve 302 arranged on the feeding pipe 301, wherein the regulating valve 302 comprises a valve plate 3021 and a driving piece for driving the valve plate 3021 to move so as to control the opening and closing of the feeding pipe 301; the valve plate 3021 is a screen plate provided with feed slits, the width of which is smaller than the diameter of the grinding medium.
In the medium grinder, the regulating valve 302 is arranged on the feeding pipe 301 communicated with the feeding hole 102, the valve plate 3021 of the regulating valve 302 is made of a sieve plate with feeding gaps, and a feeding sieve plate is not required to be arranged at the feeding hole 102 of the grinding cylinder 100; when the feed pipe 301 stops feeding, the valve plate 3021 of the regulating valve 302 is closed, and the valve plate 3021 can prevent the grinding medium from flowing back into the feed pipe 301; when the feeding pipe 301 is used for feeding, the valve plate 3021 of the regulating valve 302 is opened, and accumulated grinding media can be flushed into the grinding cavity 101 under the driving of materials, so that accumulation of aggregates in the materials at the feeding hole 102 is avoided, and the problem of uneven feeding is solved.
In this embodiment, the media mill is specifically a vertical media mill, the feed inlet 102 is disposed below the grinding drum 100, the discharge outlet 103 is disposed above the grinding drum 100, the material flows out through the discharge outlet 103 after entering the grinding chamber 101 through the feed inlet 102, the flow direction of the material in the grinding chamber 101 is from bottom to top, and the material generates an upward drag force on the grinding medium, so that the gravity applied to the grinding medium can be counteracted, and the distribution of the grinding medium in the drum 104 is more uniform. Specifically, the grinding media is more uniformly distributed along the height of the grinding drum 100. Because the drag force of the materials and the gravity of the grinding media are offset, the grinding media with the diameter of 1-5mm can be adopted, and the kinetic energy of the grinding media is in direct proportion to the cube of the diameter of the grinding media, namely, the kinetic energy of the grinding media with large size is large, compared with the traditional vertical sand mill, the kinetic energy of the grinding media in the vertical sand mill is many times larger, the material particles can be rapidly crushed, aggregates can be broken up, and the grinding efficiency is improved; in particular, the grinding efficiency of high-viscosity slurry and difficult-to-grind materials is remarkably improved. The vertical media mill can operate with a large flow rate due to the mutual offset of the drag force and the gravity of the slurry, the higher the flow rate is, the shorter the residence time of the material in the grinding drum 100 is, the smaller Wen Shengyue the material is, and the vertical media mill can be suitable for grinding the material sensitive to temperature.
Specifically, the grinding drum 100 includes a drum 104, an upper end plate 105 and a lower end plate 106, the upper end plate 105 and the lower end plate 106 are respectively disposed at the upper and lower ends of the drum 104, and the feed inlet 102 is disposed at a position of the side wall of the drum 104 near the lower end plate 106; the upper end plate 105 is provided with a top plate 107, and the discharge port 103 is provided on the top plate 107. The stirring mechanism 200 comprises a main shaft 201 penetrating through the lower end plate 106 and extending into the barrel 104, and a rotor 202 fixedly sleeved on the main shaft 201, wherein a stirring assembly 203 is arranged on the periphery of the rotor 202, and the stirring assembly 203 rotates along with the rotor 202 to grind and stir materials in the grinding cavity 101. The upper portion of rotor 202 is equipped with the centre tank that is located the roof 107 below, and the below of roof 107 is equipped with the ejection of compact screen cloth 4 that stretches into the centre tank, and ejection of compact screen cloth 4 is the tube-shape, forms annular clearance between ejection of compact screen cloth 4 and the rotor 202. Specifically, the top plate 107 is mounted on the upper end plate 105 by a plurality of screws, and the upper end of the discharge screen 4 is connected to the lower end of the top plate 107. When the discharging screen 4 is required to be cleaned regularly, only the screws are required to be disassembled, the top plate 107 and the discharging screen 4 are required to be taken out integrally, and the grinding medium in the grinding cylinder 100 is not required to be discharged, so that the operation is simple.
In this embodiment, the feed port 102 is provided at a position near the lower end plate 106 on the side of the cylinder 104, and the feed direction of the feed pipe 301 is set in a tangential direction of the inner wall of the grinding cylinder 100. By the arrangement, the movement direction of the material when entering the grinding cylinder 100 is the same as the movement direction of the original material in the grinding cylinder 100, the consistency of the running direction of the material is ensured, and the uniformity of the distribution of the grinding medium in the material is improved.
In some embodiments of this embodiment, there are a plurality of feeding ports 102, each feeding port 102 is connected to a feeding pipe 301, and the feeding direction of the feeding pipes 301 is set along the tangential direction of the inner wall of the grinding drum 100; the feed pipes 301 are uniformly arranged along the circumferential direction of the grinding drum 100. By the arrangement, on one hand, the consistency of the running direction of the materials can be ensured, and turbulence in the materials is reduced; on the other hand, the flow rate of the material at the feeding port 102 can be reduced, the impact of the material on the grinding medium is reduced, and the feeding pressure is reduced so as to adapt to the high-flow working condition.
In some embodiments of the present embodiment, the feeding slits on the valve plate 3021 are round holes, horizontal and vertical slit holes, or irregularly shaped through holes.
In some implementations of this embodiment, the regulator valve 302 is a pneumatic butterfly valve disposed in the feed tube 301 proximate the feed port 102. In other alternative embodiments, the regulating valve 302 may be a valve body such as an electric butterfly valve or an electric gate valve, so long as the valve plate 3021 can be controlled to open or close.
In this embodiment, the other end of the feed tube 301 is connected to a feed pump that drives material through the feed tube 301 into the grinding chamber 101.
In this embodiment, a pressure gauge 303 for detecting the internal pressure of the feeding pipe 301 is disposed on the feeding pipe 301, the pressure gauge 303 is electrically connected with a controller, the controller is electrically connected with the regulating valve 302, and when a pressure signal detected by the pressure gauge 303 reaches a set threshold value, the controller controls the regulating valve 302 to be opened. The controller is preferably a PLC controller.
After the feed pump is started, the pressure of the valve plate 3021 of the regulating valve 302 near the feed pump is gradually increased, when the pressure value detected by the pressure gauge 303 reaches a set value, the PLC controller automatically controls the regulating valve 302 to start, the valve plate 3021 of the regulating valve 302 is opened, and grinding media on the side of the collecting valve plate 3021 near the feed port 102 are flushed into the grinding cavity 101 under larger fluid pressure, so that the grinding media are prevented from accumulating in the feed pipe 301; when the feeding needs to be closed, the PLC controller controls the regulating valve 302 to be closed and then controls the feeding pump to be closed, or simultaneously controls the regulating valve 302 and the feeding pump to be closed, so that automatic feeding of the grinding machine can be realized, and grinding media are prevented from entering the feeding pump through the feeding pipe 301.
The use process of the medium grinder is as follows: the grinding medium is filled in the annular space between the rotor 202 and the cylinder 104, the feed inlet 102 is connected with the feed pump through the feed pipe 301, the feed pump is started firstly, the pressure of a valve plate 3021 of the regulating valve 302, which is close to one side of the feed pump, is gradually increased, when the pressure value detected by the pressure gauge 303 reaches a set value, the PLC controller automatically controls the regulating valve 302 to start, the valve plate 3021 of the regulating valve 302 is opened, the material is conveyed into the cylinder 104 through the feed pipe 301 and the feed inlet 102, the grinding medium is also flushed into the grinding cavity 101 under the larger fluid pressure, the driving mechanism drives the spindle 201, the rotor 202 and the stirring assembly 203 to rotate, the rotor 202 and the stirring assembly 203 drive the grinding medium to move at a high speed in the cylinder 104, solid particles in the material are crushed by the impact and shearing of the grinding medium when passing through the cylinder 104, and the crushed material enters an annular gap between the rotor 202 and the discharge screen 4 through inclined holes on the side wall of the rotor 202 and is output outwards from the discharge port 103 through the discharge screen 4; when the feeding needs to be closed, the PLC controller controls the regulating valve 302 to be closed and then controls the feeding pump to be closed, or simultaneously controls the regulating valve 302 and the feeding pump to be closed, so that automatic feeding of the grinding machine can be realized, and grinding media are prevented from entering the feeding pump through the feeding pipe 301.
Example two
A media mill as shown in fig. 3 is different from the first embodiment in that a feed port 102 is provided in a lower end plate 106 at the bottom of a mill drum 100, and a feed direction of a feed pipe 301 is set from bottom to top.
In some embodiments, a first detection probe and a second detection probe, wherein one end of the first detection probe extends into the grinding cavity 101, the first detection probe is used for detecting a first impact frequency signal of the lower half area of the grinding cavity 101 in real time, and the second detection probe is used for detecting a second impact frequency signal of the upper half area of the grinding cavity 101 in real time; the first detection probe and the second detection probe are electrically connected with the PLC, and the PLC adjusts the running speed of the feed pump according to whether the ratio of the first impact frequency value indicated by the first impact frequency signal to the second impact frequency value indicated by the second impact frequency signal obtained at the same time point is within a preset interval range, so that the feed flow of the grinder is adjusted.
Specifically, when the ratio of the first impact frequency value indicated by the first impact frequency signal and the second impact frequency value indicated by the second impact frequency signal obtained at the same time point is smaller than the minimum value of the preset interval range, it is indicated that the grinding medium is concentrated at the upper part of the grinding cavity 101, and at the moment, the feeding flow of the feeding pump is properly reduced; when the ratio of the first impact frequency value indicated by the first impact frequency signal and the second impact frequency value indicated by the second impact frequency signal obtained at the same time point is greater than the maximum value of the preset interval range, the grinding medium is indicated to be concentrated at the lower part of the grinding cavity 101, and the feeding flow of the feeding pump is properly increased at the moment; by adjusting the flow rate, the flow rate of an interface perpendicular to the axis in the grinding cavity 101 is controlled, so that the hydrodynamic force, gravity and buoyancy of the grinding medium are balanced, the grinding medium can be basically suspended in the grinding cavity 101, uniform distribution of the grinding medium in the grinding cavity 101 is guaranteed, the influence of uneven distribution of the grinding medium on the grinding efficiency is avoided, and the abrasion of the inner rotor 202 of the grinding machine and the grinding medium caused by local accumulation of the grinding medium is also avoided; moreover, by combining the scheme that the regulating valve 302 is arranged on the feeding pipe 301 to ensure uniform feeding, the accuracy of the flow regulating result can be further ensured, and the grinding efficiency is improved. In addition, the PLC can automatically adjust the feeding flow according to the detection result, and when parameters such as the density, the size, the filling rate, the slurry viscosity and the like of the grinding medium are changed, the PLC can be quickly adjusted and adapted, and the application range is wider.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (8)
1. A vertical media mill, comprising a grinding cylinder (100) and a stirring mechanism (200), wherein the grinding cylinder (100) comprises a cylinder body (104) with a grinding cavity (101), an upper end plate (105) arranged at the upper end of the cylinder body (104) and a lower end plate (106) arranged at the lower end of the cylinder body (104); the barrel body (104) or the lower end plate (106) is provided with a feed inlet (102), the upper end plate (105) is provided with a discharge outlet (103), and the stirring mechanism (200) comprises a stirring assembly (203) which stretches into the grinding cavity (101) to stir materials and grinding media in the grinding cavity (101);
characterized by further comprising:
the feeding mechanism comprises a feeding pipe (301) with one end communicated with the feeding hole (102) and a regulating valve (302) arranged on the feeding pipe (301), wherein the regulating valve (302) comprises a valve plate (3021) and a driving piece for driving the valve plate (3021) to move so as to control the opening and closing of the feeding pipe (301); the valve plate (3021) is a sieve plate provided with a feeding gap, and the width of the feeding gap is smaller than the diameter of the grinding medium;
the other end of the feeding pipe (301) is connected with a feeding pump, and the feeding pump drives materials to enter the grinding cavity (101) through the feeding pipe (301); the feeding pipe (301) is provided with a pressure gauge (303) for detecting the internal pressure of the feeding pipe (301), the pressure gauge (303) is electrically connected with a controller, the controller is electrically connected with the regulating valve (302), and when a pressure signal detected by the pressure gauge (303) reaches a set threshold value, the controller controls the regulating valve (302) to be opened;
after the feed pump is started, the pressure of a valve plate (3021) of the regulating valve (302) close to the feed pump is gradually increased, and when the pressure value detected by the pressure gauge (303) reaches a set value, the controller automatically controls the regulating valve (302) to start, and the valve plate (3021) of the regulating valve (302) is opened; when the feeding needs to be closed, the controller firstly controls the regulating valve (302) to be closed and then controls the feeding pump to be closed.
2. The vertical media mill according to claim 1, characterized in that the feed opening (102) is provided at a position near the bottom of the side edge of the grinding drum (100), and the feed direction of the feed pipe (301) is provided in a tangential direction of the inner wall of the grinding drum (100).
3. The vertical media mill according to claim 2, wherein the feed openings (102) are two or more, the feed openings (102) are all communicated with one feed pipe (301), and the feed directions of the feed pipes (301) are all arranged along the tangential direction of the inner wall of the grinding cylinder (100); the feeding pipes (301) are uniformly arranged along the circumferential direction of the grinding cylinder (100).
4. The vertical media mill according to claim 1, characterized in that the feed opening (102) is provided at the bottom of the mill drum (100), the feed direction of the feed pipe (301) being provided from bottom to top.
5. The vertical media mill according to claim 1, characterized in that the feed slit on the valve plate (3021) is a round hole or a horizontal-vertical slit hole or an irregularly shaped through hole.
6. The vertical media mill according to claim 1, characterized in that the regulating valve (302) is a pneumatic butterfly valve.
7. The vertical media mill according to claim 1, characterized in that a first detection probe and a second detection probe are provided on the side wall of the cylinder (104) with one end extending into the milling chamber (101), the first detection probe being used for detecting in real time a first impact frequency signal below the milling chamber (101), the first detection probe being used for detecting in real time a second impact frequency signal above the milling chamber (101); the first detection probe and the second detection probe are electrically connected with the controller, and the controller adjusts the running speed of the feed pump according to whether the ratio of a first impact frequency value indicated by the first impact frequency signal to a second impact frequency value indicated by the second impact frequency signal obtained at the same time point is in a preset interval range or not so as to adjust the feed flow of the grinder.
8. The vertical media mill according to claim 1, characterized in that the stirring mechanism (200) comprises a main shaft (201) extending into the cylinder (104) and a rotor (202) fixedly sleeved on the main shaft (201), the stirring assembly (203) being arranged around the outer periphery of the rotor (202); the upper portion of rotor (202) is equipped with and is located the centre tank of upper end plate (105) below, the below of upper end plate (105) is equipped with and stretches into ejection of compact screen cloth (4) in the centre tank, ejection of compact screen cloth (4) are the tube-shape, ejection of compact screen cloth (4) with form annular clearance between rotor (202).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211251547.XA CN115591634B (en) | 2022-10-12 | 2022-10-12 | Vertical medium grinds machine |
| PCT/CN2023/087689 WO2024077902A1 (en) | 2022-10-12 | 2023-04-11 | Medium grinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211251547.XA CN115591634B (en) | 2022-10-12 | 2022-10-12 | Vertical medium grinds machine |
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| CN115591634A CN115591634A (en) | 2023-01-13 |
| CN115591634B true CN115591634B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211251547.XA Active CN115591634B (en) | 2022-10-12 | 2022-10-12 | Vertical medium grinds machine |
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| WO (1) | WO2024077902A1 (en) |
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| CN115591634B (en) * | 2022-10-12 | 2023-11-03 | 深圳市尚水智能股份有限公司 | Vertical medium grinds machine |
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| Publication number | Publication date |
|---|---|
| CN115591634A (en) | 2023-01-13 |
| WO2024077902A1 (en) | 2024-04-18 |
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