CN115591634A

CN115591634A - Medium grinding machine

Info

Publication number: CN115591634A
Application number: CN202211251547.XA
Authority: CN
Inventors: 杜保东; 李统柱; 郑娇容; 金旭东
Original assignee: SHENZHEN SHANGSHUI INTELLIGENT EQUIPMENT CO Ltd
Current assignee: SHENZHEN SHANGSHUI INTELLIGENT EQUIPMENT CO Ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-01-13
Anticipated expiration: 2042-10-12
Also published as: WO2024077902A1; CN115591634B

Abstract

The application discloses media mill includes: the grinding cylinder is provided with a grinding cavity, a feeding hole and a discharging hole which are communicated with the grinding cavity; one end of the stirring mechanism extends into the grinding cavity and is used for stirring the materials and the grinding media in the grinding cavity; the feeding mechanism comprises a feeding pipe and a regulating valve, wherein one end of the feeding pipe is communicated with the feeding hole, the regulating valve is arranged on the feeding pipe and 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 the sieve that is equipped with the feeding gap, and the width in feeding gap is less than the diameter of grinding medium. By the design, a feeding sieve plate is not required to be arranged at the feeding port, when the feeding pipe stops feeding, the valve plate of the regulating valve is closed, and the valve plate can prevent the grinding medium from flowing back into the feeding pipe; when the inlet pipe feeding, the valve plate of governing valve is opened, and accumulational grinding medium can rush into the grinding intracavity under the drive of material, has avoided the accumulation of aggregate in the material in feed inlet department, has solved the inhomogeneous problem of feeding.

Description

Medium grinding machine

Technical Field

The application relates to the technical field of grinding mills, in particular to a medium grinding mill.

Background

In the production process of lithium battery slurry, a grinder is required to fully grind and disperse the slurry. The medium grinder is a grinding dispersion device with wide application range, and because the material properties, the fineness requirements and the process conditions of different products are greatly different, the grinding medium can be properly added or reduced to adjust the fineness requirements. The high-efficiency grinding device is widely applied to high-efficiency grinding equipment in the industries of paint, dye, printing ink, pesticide, magnetic tapes, papermaking, leather, chemical engineering 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 medium grinding machine with the lower inlet and the upper outlet, a feed inlet is generally arranged at the lower end of a grinding cylinder for feeding, and a feed screen is generally arranged at the feed inlet in order to prevent grinding media from entering a feed pipeline. The feeding sieve is provided with a narrow slit, the width of the narrow slit is smaller than the diameter of the grinding medium, the material can enter the grinding cylinder through the narrow slit, and the medium in the grinding cylinder cannot pass through the narrow slit. Some materials produce easily and reunite, and the size of aggregate is greater than the slot width of feed sieve, and when the material passed through the feed sieve, reunion body card can't pass through at the slot of feed sieve, and the aggregate is piled up and further reunites in feed sieve bottom, can reduce the area of overflowing of feed sieve, leads to the feeding resistance to increase, and feed flow reduces, can block up the feed sieve totally when serious, influences later stage grinding efficiency and grinding effect.

Content of application

Therefore, the technical problem that this application will be solved lies in overcoming the feed sieve of prior art medium grinding machine feed inlet department and appearing the material easily and pile up, and then influence the defect of feed flow to a medium grinding machine is provided.

In order to solve the technical problem, the technical scheme of the application is as follows:

a medium grinding machine 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 stirring mechanism comprises a stirring assembly which extends into the grinding cavity to stir the materials and the grinding media in the grinding cavity;

the feeding mechanism comprises a feeding pipe and a regulating valve, wherein one end of the feeding pipe is communicated with the feeding hole, the regulating valve is arranged on the feeding pipe and comprises a valve plate and a driving piece, and the driving piece drives the valve plate to move so as to control the feeding pipe to be opened and closed; the valve plate is the sieve that is equipped with the feeding gap, the width in feeding gap is less than grinding medium's diameter.

Further, the feed inlet sets up grinding vessel side is close to the position department of bottom, the direction of feed of inlet pipe is followed the tangential direction setting of grinding vessel inner wall.

Furthermore, a plurality of feed inlets are arranged, each feed inlet is communicated with one feed pipe, and the feeding direction of each feed 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 sets up the bottom of grinding vessel, the direction of feed of inlet pipe sets up from bottom to top.

Furthermore, the feeding gap on the valve plate is a circular hole, a transverse and vertical slit hole or a through hole with an irregular shape.

Further, the regulating valve is a pneumatic butterfly valve.

Further, the other end of inlet pipe is connected with the charge pump, the charge pump drive material passes through the inlet pipe gets into in the grinding chamber.

Further, be equipped with the manometer that is used for detecting on the inlet pipe the internal pressure of inlet pipe, the manometer electricity is connected with the controller, the controller with the governing valve electricity is connected, when pressure signal that the manometer detected reaches the settlement threshold value, the controller control the governing valve is opened.

Furthermore, a first detection probe and a second detection probe with one end extending into the grinding cavity are arranged on the side edge of the cylinder body, the first detection probe is used for detecting a first impact frequency signal of the lower half area of the grinding cavity 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 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 feeding pump according to whether the ratio of a first impact frequency value indicated by the first impact frequency signal and a second impact frequency value indicated by the second impact frequency signal acquired at the same time point is within a preset interval range, so that the feeding flow of the grinder is adjusted.

Furthermore, a top plate is arranged on the upper end plate, and the discharge hole is formed in the top plate; the stirring mechanism comprises a main shaft extending into the cylinder and a rotor fixedly sleeved on the main shaft, and the stirring component is arranged on the outer periphery of the rotor; the upper portion of rotor is equipped with and is located the central groove of upper end plate below, the below of upper end plate is equipped with stretches into the ejection of compact screen cloth in the central groove, ejection of compact screen cloth is the tube-shape, ejection of compact screen cloth with form annular gap between the rotor.

This application technical scheme has following advantage:

1. according to the medium grinding machine provided by the application, the adjusting valve is arranged on the feeding pipe communicated with the feeding hole of the grinding cylinder, the valve plate of the adjusting valve is made of a sieve plate with a feeding gap, the width of the feeding gap is smaller than the diameter of a 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 the grinding medium from flowing back into the feeding pipe; when the inlet pipe feeding, the valve plate of governing valve is opened, and accumulational grinding medium can rush into the grinding intracavity under the drive of material, has avoided the accumulation of aggregate in the material in feed inlet department, has solved the inhomogeneous problem of feeding.

2. The application provides a medium grinding machine, the feed inlet setting is close to the position department of bottom at the grinding vessel side, and the tangential direction along the grinding vessel inner wall of the feed direction of inlet pipe sets up, so sets up, can make the material when getting into the grinding vessel in with the grinding vessel in original material the direction of motion the same, guarantees material traffic direction's uniformity, improves the homogeneity that grinding medium distributes in the material.

3. The application provides a medium grinding machine, the tangential direction setting of grinding vessel inner wall is all followed to the direction of feed of many inlet pipes, many states the setting that the feed pipe evenly arranged along the circumference of grinding vessel, can further guarantee the uniformity of material traffic direction, reduces the torrent in the material.

4. The application provides a medium grinding machine, set up the manometer on the inlet pipe, open the back at the charge pump, the valve plate of governing valve is close to the pressure of charge pump one side and can crescent, when the pressure value that the manometer detected reaches the setting value, controller automatic control governing valve starts, the valve plate of governing valve is opened, when the feeding is closed to needs, the controller controls the governing valve earlier and closes and then controls the charge pump and close, perhaps controller simultaneous control governing valve and charge pump close, so can realize the automatic feeding of grinding machine, and prevent that grinding medium from passing through in the inlet pipe gets into the charge pump.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of a vertical media mill according to an embodiment of the present application;

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic view of the overall structure of a vertical media mill provided in the second embodiment of the present application.

Description of reference numerals: 100. a grinding cylinder; 101. a grinding chamber; 102. a feed inlet; 103. a discharge port; 104. a cylinder body 105, 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. adjusting a valve; 3021. a valve plate; 303. a pressure gauge; 4. and (5) discharging a screen.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In addition, the technical features mentioned in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

Example one

A media mill, as shown in fig. 1 and 2, includes a grinding cylinder 100, a stirring mechanism 200, and a feeding mechanism. Wherein, the grinding cylinder 100 is provided with a grinding cavity 101, and a feed inlet 102 and a discharge outlet 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 the materials and the grinding media in the grinding cavity 101; the feeding mechanism comprises a feeding pipe 301 with one end communicated with the feeding port 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 feeding pipe 301 to open and close; valve plate 3021 is a screen plate with a feed gap having a width less than the diameter of the grinding media.

In the medium grinder, the adjusting valve 302 is arranged on the feeding pipe 301 communicated with the feeding port 102, and the valve plate 3021 of the adjusting valve 302 is made of a sieve plate with feeding gaps, so that a feeding sieve plate does not need to be arranged at the feeding port 102 of the grinding cylinder 100; when feed line 301 stops feeding, valve plate 3021 of regulator valve 302 closes, and valve plate 3021 prevents abrasive media from flowing back into feed line 301; when the feeding pipe 301 is used for feeding, the valve plate 3021 of the regulating valve 302 is opened, and the accumulated grinding media are driven by the material to flush into the grinding cavity 101, so that accumulation of aggregates in the material at the feeding port 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 milling cylinder 100, the discharge outlet 103 is disposed above the milling cylinder 100, the material enters the milling cavity 101 through the feed inlet 102 and then flows out through the discharge outlet 103, the flow direction of the material in the milling cavity 101 is from bottom to top, the material generates an upward drag force on the milling media, which can offset the gravity applied to the milling media, so that the distribution of the milling media in the cylinder 104 is more uniform. In particular, the grinding media are distributed more uniformly along the height of the grinding cylinder 100. The vertical medium grinder can adopt the grinding medium with the diameter of 1-5mm because the drag force of the material and the gravity of the grinding medium are mutually offset, and the kinetic energy of the grinding medium is in direct proportion to the cube of the diameter of the grinding medium, namely the kinetic energy of the large-size grinding medium is large, so that compared with the traditional vertical medium grinder, the kinetic energy of the grinding medium in the vertical medium grinder is many times larger, the material particles can be quickly ground, the aggregates are broken up, and the grinding efficiency is improved; particularly, the grinding efficiency for high-viscosity slurry and difficult-to-grind materials is remarkably improved. The vertical medium grinder can operate at a large flow rate due to the mutual offsetting effect of the drag force and the gravity of the slurry, the larger the flow rate is, the shorter the retention time of the material in the grinding cylinder 100 is, and the smaller the temperature rise of the material is, so that the vertical medium grinder can be suitable for grinding the material sensitive to the temperature.

Specifically, the grinding cylinder 100 comprises a cylinder body 104, an upper end plate 105 and a lower end plate 106, wherein the upper end plate 105 and the lower end plate 106 are respectively arranged at the upper end and the lower end of the cylinder body 104, and the feed inlet 102 is arranged at the position, close to the lower end plate 106, of the side wall of the cylinder body 104; the upper end plate 105 is provided with a top plate 107, and the discharge port 103 is arranged on the top plate 107. The stirring mechanism 200 includes a main shaft 201 penetrating through the lower end plate 106 and extending into the cylinder 104, and a rotor 202 fixedly sleeved on the main shaft 201, wherein a stirring assembly 203 is arranged on the outer periphery of the rotor 202, and the stirring assembly 203 rotates with the rotor 202 to grind and stir the material in the grinding chamber 101. The upper portion of rotor 202 is equipped with the central slot that is located roof 107 below, and the below of roof 107 is equipped with the ejection of compact screen cloth 4 that stretches into in the central slot, 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 attached to 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 needs to be cleaned regularly, only the screws need to be disassembled, the top plate 107 and the discharging screen 4 are integrally taken out, the grinding medium in the grinding cylinder 100 does not need to be discharged, and the operation is simple.

In this embodiment, the feed inlet 102 is disposed at a position close to the lower end plate 106 on the side of the barrel 104, and the feed direction of the feed pipe 301 is disposed along the tangential direction of the inner wall of the grinding cylinder 100. So set up, can make the material when getting into grinding vessel 100 in with grinding vessel 100 in original material's the direction of motion the same, guarantee the uniformity of material traffic direction, improve the homogeneity that grinding medium distributes in the material.

In some specific embodiments of this embodiment, there are multiple feed inlets 102, each feed inlet 102 is communicated with one feed pipe 301, and the feed direction of the feed pipe 301 is set along the tangential direction of the inner wall of the grinding cylinder 100; the feed pipes 301 are uniformly arranged along the circumference of the grinding drum 100. By the arrangement, on one hand, the consistency of the material running direction can be ensured, and the turbulence in the material is reduced; on the other hand, the flow velocity of the materials at the feed port 102 can be reduced, the impact of the materials on the grinding medium is reduced, and the feed pressure is reduced, so that the working condition of large flow is adapted.

In some embodiments of this embodiment, the feeding gap on the valve plate 3021 is a circular hole, a horizontal slit hole, or a through hole with irregular shape.

In some embodiments of this embodiment, the regulating valve 302 is a pneumatic butterfly valve, which is disposed in the feed pipe 301 near the feed inlet 102. In other alternative embodiments, the regulating valve 302 may also be a valve body such as an electric butterfly valve, an electric gate valve, etc., as long as the valve plate 3021 can be controlled to open and close.

In this embodiment, the other end of the feed pipe 301 is connected to a feed pump which drives material through the feed pipe 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 to a controller, the controller is electrically connected to the regulating valve 302, and when a pressure signal detected by the pressure gauge 303 reaches a set threshold, the controller controls the regulating valve 302 to open. 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 close to the feed pump is gradually increased, when the pressure value detected by the pressure gauge 303 reaches a set value, the PLC automatically controls the regulating valve 302 to be started, the valve plate 3021 of the regulating valve 302 is opened, and the grinding medium on the side, close to the feed port 102, of the aggregation valve plate 3021 is flushed into the grinding cavity 101 under the relatively high fluid pressure, so that the accumulation of the grinding medium in the feed pipe 301 is avoided; when the feeding needs to be closed, the PLC controls the regulating valve 302 to be closed and then controls the feeding pump to be closed, or the PLC controls the regulating valve 302 and the feeding pump to be closed at the same time, so that the automatic feeding of the grinding machine can be realized, and the grinding medium is prevented from entering the feeding pump through the feeding pipe 301.

The use process of the medium grinding machine comprises the following steps: filling grinding media in an annular space between the rotor 202 and the cylinder 104, connecting the feed inlet 102 with the feed pump through a feed pipe 301, starting the feed pump, gradually increasing the pressure of a valve plate 3021 of the regulating valve 302 close to the feed pump, when a pressure value detected by a pressure gauge 303 reaches a set value, automatically controlling the regulating valve 302 to start, opening a valve plate 3021 of the regulating valve 302, conveying the material into the cylinder 104 through the feed pipe 301 and the feed inlet 102, flushing the grinding media into the grinding cavity 101 under a large fluid pressure, driving the main shaft 201, the rotor 202 and the stirring assembly 203 to rotate by a driving mechanism, driving the grinding media to move at a high speed in the cylinder 104 by using the rotor 202 and the stirring assembly 203, impacting and shearing the solid particles in the material when the material passes through the cylinder 104, entering an annular gap between the rotor 202 and the discharge screen 4 through an inclined hole in the side wall of the rotor 202, and outputting the crushed material to the outside through the discharge screen 4 and the discharge hole 103; when the feeding needs to be closed, the PLC controls the regulating valve 302 to be closed firstly and then controls the feeding pump to be closed, or the PLC controls the regulating valve 302 and the feeding pump to be closed simultaneously, so that the automatic feeding of the grinding machine can be realized, and the grinding medium is prevented from entering the feeding pump through the feeding pipe 301.

Example two

A media mill 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 grinding vessel 100, and a feed pipe 301 is provided in a feed direction from the bottom up.

In some embodiments, a first detection probe and a second detection probe, one end of which extends into the grinding cavity 101, are provided at a side edge of the grinding cylinder 100, the first detection probe is used for detecting a first impact frequency signal of a 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 an 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 feeding pump according to whether the ratio of a first impact frequency value indicated by the first impact frequency signal and a second impact frequency value indicated by the second impact frequency signal acquired at the same time point is within a preset interval range, so that the feeding flow of the grinder is adjusted.

Specifically, when the ratio of a first impact frequency value indicated by a first impact frequency signal and a second impact frequency value indicated by a second impact frequency signal acquired at the same time point is smaller than the minimum value of the preset interval range, it indicates that the grinding medium is concentrated at the upper part of the grinding cavity 101, and at this time, the feed flow rate of the feed pump is appropriately reduced; when the ratio of a first impact frequency value indicated by a first impact frequency signal and a second impact frequency value indicated by a second impact frequency signal acquired at the same time point is larger than the maximum value of the preset interval range, the grinding media are concentrated at the lower part of the grinding cavity 101, and the feeding flow of the feeding pump is properly increased; by adjusting the flow rate, the flow velocity of an interface vertical to the axis in the grinding cavity 101 is controlled, so that the hydrodynamic force, the gravity and the buoyancy of the grinding medium are balanced, the grinding medium can be basically suspended in the grinding cavity 101, the uniform distribution of the grinding medium in the grinding cavity 101 is ensured, the influence of the nonuniform distribution of the grinding medium on the grinding efficiency is avoided, and the abrasion of the grinding medium on the inner rotor 202 of the grinding machine and the grinding medium caused by the local accumulation of the grinding medium is also avoided; moreover, the scheme that the regulating valve 302 is arranged on the feeding pipe 301 to ensure uniform feeding is combined, so that the accuracy of a flow regulation result can be further ensured, and the grinding efficiency is favorably improved. In addition, the PLC controller can automatically adjust the feeding flow according to the detection result, and when parameters such as the density, the size, the filling rate and the slurry viscosity of the grinding medium are changed, the PLC controller can be rapidly adjusted and adapted, and the application range is wider.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the scope of the invention as expressed herein.

Claims

1. A media mill comprising a grinding cylinder (100) and a stirring mechanism (200), the grinding cylinder (100) comprising a cylinder (104) having a grinding chamber (101), an upper end plate (105) provided at an upper end of the cylinder (104), and a lower end plate (106) provided at a lower end of the cylinder (104); a feed inlet (102) is formed in the cylinder (104) or the lower end plate (106), a discharge outlet (103) is formed in the upper end plate (105), and the stirring mechanism (200) comprises a stirring assembly (203) which extends into the grinding cavity (101) and stirs materials and grinding media in the grinding cavity (101);

it is characterized by also comprising:

the feeding mechanism comprises a feeding pipe (301) and a regulating valve (302), wherein one end of the feeding pipe (301) is communicated with the feeding port (102), the regulating valve (302) is arranged on the feeding pipe (301), and the regulating valve (302) comprises a valve plate (3021) and a driving piece which drives the valve plate (3021) to move so as to control the feeding pipe (301) to be opened and closed; valve plate (3021) is for being equipped with the sieve of feeding gap, the width in feeding gap is less than the diameter of grinding medium.

2. A media mill according to claim 1, characterized in that the feed opening (102) is arranged at a position at the side of the grinding cylinder (100) near the bottom, and the feed direction of the feed pipe (301) is arranged in the tangential direction of the inner wall of the grinding cylinder (100).

3. A media mill according to claim 2, characterized in that there are two or more feed openings (102), each feed opening (102) is connected to one feed pipe (301), the feed directions of the feed pipes (301) are arranged in 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. A media mill according to claim 1, characterized in that the feed opening (102) is arranged at the bottom of the grinding drum (100), the feed direction of the feed pipe (301) being arranged from bottom to top.

5. Media mill according to claim 1, characterized in that the feed gap in the valve plate (3021) is a circular hole or a cross-vertically slit hole or an irregularly shaped through hole.

6. The media mill of claim 1, wherein the regulating valve (302) is a pneumatic butterfly valve.

7. A media mill according to claim 1, characterized in that a feed pump is connected to the other end of the feed pipe (301), which feed pump drives material through the feed pipe (301) into the grinding chamber (101).

8. The medium grinding machine according to claim 7, characterized in that the feed pipe (301) is provided with a pressure gauge (303) for detecting the internal pressure of the feed 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 open.

9. The media mill according to claim 8, characterized in that the side wall of the barrel (104) is provided with a first detection probe and a second detection probe, one end of the first detection probe extending into the grinding chamber (101), the first detection probe being used for detecting a first impact frequency signal below the grinding chamber (101) in real time, the first detection probe being used for detecting a second impact frequency signal above the grinding chamber (101) 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 and a second impact frequency value indicated by the second impact frequency signal obtained at the same time point is within a preset interval range so as to adjust the feed flow of the grinder.

10. A media mill according to claim 1, characterized in that the stirring mechanism (200) comprises a main shaft (201) extending into the barrel (104) and a rotor (202) secured to the main shaft (201), the stirring assembly (203) being disposed around the outer periphery of the rotor (202); the upper portion of rotor (202) is equipped with and is located the central slot 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 central slot, ejection of compact screen cloth (4) are the tube-shape, ejection of compact screen cloth (4) with form annular gap between rotor (202).