Coal pulverizer

Abstract

The invention relates to the technical field of coal grinding devices, in particular to a coal grinding pulverizer which comprises a plurality of coal crushing blocks, a coal crushing assembly, a shell, a filter plate and a discharging assembly, the filter plate and the discharging assembly are arranged in a containing cavity, the containing cavity is formed in the shell, and an inlet communicated with the containing cavity is formed in the top of the shell. The coal crushing assembly is arranged in the containing cavity and comprises a driving part and a coal crushing rod, the driving part is arranged at the top of the shell, the output end of the driving part is connected with the coal crushing rod, the coal crushing rod is provided with a plurality of threaded grooves, the threaded grooves are arranged in the extending direction of the coal crushing rod in a threaded mode, and a plurality of mounting convex surfaces 2041 are formed among the threaded grooves; the crushed coal blocks are arranged on the mounting convex surface 2041, the multiple crushed coal blocks are spirally arranged at intervals in the extending direction of the coal crushing rod, the filter plate is arranged at the lower end of the coal crushing assembly, an outlet is formed in the bottom of the shell, the discharging assembly is arranged at the lower end of the filter plate, and the output end of the discharging assembly faces the outlet. According to the coal grinding pulverizer, pulverizing can be conducted before coal grinding, so that the coal grinding efficiency and the combustion quality of pulverized coal are improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal grinding devices, and in particular to a coal grinding pulverizer. Background Art

[0002] The working principle of power generation in thermal power plants is to use coal as the primary energy source. After the coal powder is burned to heat the water in the boiler, the water vapor enters the high-pressure cylinder. In order to improve the thermal efficiency, the water vapor is heated for a second time and enters the medium-pressure cylinder. The steam drives the steam turbine generator to generate electricity. Before the coal blocks are put into use, they need to be ground to improve their combustion efficiency. Therefore, the coal is processed by a coal mill before combustion. The efficiency of directly grinding the coal by a coal mill is limited. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a coal grinding pulverizer, which can pulverize coal before pulverizing to improve the coal pulverizing efficiency and the combustion quality of coal powder.

[0005] A coal pulverizer according to an embodiment of the present invention comprises:

[0006] A shell, wherein the shell has a receiving cavity and the top of the shell is provided with an inlet communicating with the receiving cavity;

[0007] A coal crushing assembly, the coal crushing assembly is arranged in the accommodating cavity, and the coal crushing assembly comprises a driving component and a coal crushing rod, the driving component is arranged on the top of the shell, the output end of the driving component is connected to the coal crushing rod, the coal crushing rod is provided with a plurality of thread grooves, the plurality of thread grooves are threadedly arranged along the extension direction of the coal crushing rod, and a plurality of mounting convex surfaces are formed between the plurality of thread grooves;

[0008] A plurality of crushed coal blocks, wherein the crushed coal blocks are arranged on the mounting convex surface, and the plurality of crushed coal blocks are arranged spirally and at intervals along the extending direction of the crushed coal rod;

[0009] A filter plate and a discharge assembly are arranged in the accommodating cavity, wherein the filter plate is arranged at the lower end of the crushed coal assembly, an outlet is arranged at the bottom of the shell, and the discharge assembly is arranged at the lower end of the filter plate with the output end of the discharge assembly facing the outlet.

[0010] The coal grinding pulverizer according to the embodiment of the present invention can pulverize coal before pulverizing so as to improve the coal pulverizing efficiency and the combustion quality of coal powder.

[0011] In some embodiments, the mounting convex surface 2041 is in a shape of a triangle, a rectangle, or a semicircle.

[0012] In some embodiments, the distance between the top of the accommodating chamber and the filter plate is A, and 5m≤A≤6m, and the material height between the filter plate and the top of the accommodating chamber is 2 / 3A to 4 / 5A.

[0013] In some embodiments, the shape of the crushed coal blocks is any one of a triangular pyramid, a hemisphere, a cone or a truncated cone.

[0014] In some embodiments, the driving component includes a first motor, a rotating rod and a protective cover. The first motor is arranged between the shell and the protective cover. The protective cover is connected to the shell. The output end of the first motor extends out of the protective cover and is connected to one end of the rotating rod. The other end of the rotating rod is connected to the coal crushing rod.

[0015] In some embodiments, the coal pulverizer further includes a protective tube, which is disposed between the filter plate and the top of the shell, and the protective tube is in contact with the inner wall surface of the accommodating chamber.

[0016] In some embodiments, the discharge assembly includes a discharge plate and a telescopic component, one end of the discharge plate is pivotally connected to the shell, and the other end of the discharge plate is connected to the top of the telescopic component. The telescopic component is telescopic to allow the discharge plate to rotate in the up and down directions relative to the shell, and the discharge plate at least partially extends out of the shell outlet.

[0017] In some embodiments, the discharge assembly further includes a spring rod, one end of which is connected to the bottom of the shell, and the other end of which is connected to the discharge plate.

[0018] In some embodiments, the telescopic component includes a sleeve, a threaded rod, a rotating ball and a second motor, the second motor is arranged on the shell, the output end of the second motor is connected to the threaded rod, the threaded rod is threadedly connected to the sleeve, the end of the sleeve away from the threaded rod is connected to the rotating ball, and the rotating ball is arranged at the bottom of the discharge plate.

[0019] In some embodiments, there are multiple crushed coal assemblies, and the multiple crushed coal assemblies are arranged in a matrix in the accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the front cross-sectional structure of a coal grinding mill according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of a side cross-sectional view of a coal grinding mill according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the discharging mechanism of a coal grinding mill according to an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of a coal crushing rod according to an embodiment of the present invention.

[0024] Figure 5 Schematic diagram of broken coal blocks according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Shell 1, shock absorbing spring 101, bottom plate 102, slot 103, support leg 104, inlet 105, outlet 106, coal crushing assembly 2, protective cover 201, first motor 202, rotating rod 203, coal crushing rod 204, mounting convex surface 2041, threaded groove 2042,

[0027] Protective tube 205, filter plate 3, chute 301, filter plate 3, handle 303, discharge assembly 4, fixed plate 401, second motor 402, threaded rod 403, sleeve 404, rotating ball 405, discharge plate 406, rotating shaft 407, spring rod 408, fixed block 409,

[0028] Crushed coal 5. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] refer to Figures 1 to 5 As shown, a coal pulverizer according to an embodiment of the present invention comprises:

[0031] A housing 1 having a receiving cavity therein and an inlet 105 communicating with the receiving cavity at the top of the housing 1;

[0032] A coal crushing assembly 2, which is arranged in the accommodating cavity and includes a driving component and a coal crushing rod 204. The driving component is arranged on the top of the housing 1, and the output end of the driving component is connected to the coal crushing rod 204. The coal crushing rod 204 is provided with a plurality of thread grooves 2042, and the plurality of thread grooves 2042 are threadedly arranged along the extension direction of the coal crushing rod 204, and a plurality of mounting convex surfaces 2041 are formed between the plurality of thread grooves 2042;

[0033] A plurality of crushed coal blocks, the crushed coal blocks are arranged on the mounting convex surface 2041, and the plurality of crushed coal blocks are arranged spirally and at intervals along the extending direction of the crushed coal rod 204;

[0034] The filter plate 3 and the discharge assembly 4 are arranged in the accommodating cavity. The filter plate 3 is arranged at the lower end of the crushed coal assembly 2. An outlet 106 is arranged at the bottom of the shell 1. The discharge assembly 4 is arranged at the lower end of the filter plate 3 and the output end of the discharge assembly 4 faces the outlet 106.

[0035] The coal grinding pulverizer according to the embodiment of the present invention can pulverize coal before pulverizing so as to improve the coal pulverizing efficiency and the combustion quality of coal powder.

[0036] Specifically, the top of the shell 1 is provided with an inlet 105, and the coal crushing assembly 2 is provided with a side of the accommodating chamber adjacent to the inlet 105 of the shell 1, that is, the coal crushing assembly 2 is provided with the top of the accommodating chamber, and the output end of the coal crushing assembly 2 extends downward, the upper end of the driving component is connected to the top of the accommodating chamber, and the output end of the driving component is connected to the upper end of the coal crushing rod 204, and the coal crushing rod 204 is provided with a plurality of spirally arranged thread grooves 2042, and the rotation direction of the coal crushing rod 204 is the same as the spiral direction of the spiral groove from top to bottom, so that when rotating, part of the material can be moved upward through the thread groove 2042 to repeatedly crush the material. Since the driving component drives the coal crushing rod 204 to rotate, the driving component can be set to rotate forward to drive the coal crushing rod 204 to rotate so as to move part of the material upward through the thread groove 2042 to repeatedly crush the material. And the driving component can be set to reverse to drive the coal crushing rod 204 to rotate so as to move part of the material downward through the thread groove 2042 to repeatedly crush the material.

[0037] The forward rotation time and the reverse rotation time can be the same, or the forward rotation time and the reverse rotation time can be different, and the forward rotation time and the reverse rotation time can be determined according to the degree of crushing of the material.

[0038] Filter holes are provided on the filter plate 3 to filter coal blocks of appropriate size, and then the coal blocks are moved to the discharge assembly 4, and the discharge assembly 4 outputs the coal blocks from the shell 1 through the outlet 106 of the shell 1.

[0039] Furthermore, a slide groove 301 is provided in the housing 1 to install the filter plate 3, so that the filter plate 3 can slide relative to the housing 1 through the slide groove 301. A handle 303 is provided to connect with the filter plate to facilitate installation and removal of the filter plate 3. A stopper can also be provided in the slide groove 301 to limit the filter plate 3 during use, and the filter plate 3 can be limited when sliding relative to the slide groove 301 in the left and right directions.

[0040] The coal grinding and pulverizing machine of the embodiment of the present invention is provided with a coal crushing assembly 2 to crush the coal blocks. The coal crushing rod 204 is provided with a plurality of spirally arranged thread grooves 2042, so that the coal blocks can crush the coal more effectively when rotating. At the same time, the design of the thread groove 2042 also allows part of the material to be moved upward during rotation, and is repeatedly crushed, thereby improving the crushing efficiency. At the same time, the forward and reverse functions of the driving components realize the repeated crushing and stirring of the coal blocks. The machine not only improves the coal grinding efficiency, but also improves the combustion quality of the coal powder in the subsequent boiler, and provides a new solution for coal processing and utilization.

[0041] In some embodiments, the shape of the mounting convex surface 2041 is triangular, rectangular, or semicircular.

[0042] Specifically, when the coal blocks are crushed during the rotation of the coal crushing rod 204, the mounting convex surface 2041 will also contact the material, i.e., the coal blocks. When the mounting convex surface 2041 is triangular, the edges of the triangle are sharper, which can produce stronger shearing and squeezing effects during the coal crushing process, thereby improving the crushing efficiency. The rectangular mounting convex surface 2041 has a larger contact area, which can more evenly distribute the force on the coal blocks, reducing the wear and fall of the coal blocks. The semicircular shape enables the coal blocks to better contact the material during rotation, thereby improving the crushing efficiency. At the same time, the smooth edges can also reduce the friction resistance between the coal blocks and the material, reduce energy consumption, and then different mounting convex surfaces 2041 can be used according to different coal qualities.

[0043] In some embodiments, the distance between the top of the accommodating chamber and the filter plate 3 is A, and 5m≤A≤6m, and the material height between the filter plate 3 and the top of the accommodating chamber is 2 / 3A to 4 / 5A.

[0044] By setting the spacing between the top plate of the accommodating chamber and the filter plate 3, the processing space of the material is limited. The up and down direction refers to the direction of gravity. It is easy to understand that a larger spacing can accommodate more materials, thereby increasing the processing volume per unit time. However, too large a spacing may also cause uneven distribution of materials during the crushing process, affecting the crushing effect. At the same time, the power of the driving component is limited, that is, when A is too large, it is easy to reduce the crushing efficiency, and when A is too small, the amount of crushed material is small.

[0045] The material height between the filter plate 3 and the top of the accommodating chamber is 2 / 3A to 4 / 5A. That is, the appropriate material height can ensure that the material is fully crushed under the action of the coal crushing assembly 2. If the material height in the vertical direction is too low, part of the material may not be fully crushed. If the material height in the vertical direction is too high, the material will be thrown out of the shell 1 through the inlet 105 of the shell 1 during the processing, reducing the stability and safety of the crushing.

[0046] In some embodiments, the shape of the crushed coal pieces is any one of a triangular pyramid, a hemisphere, a cone or a truncated cone.

[0047] The triangular pyramid-shaped coal blocks have sharp vertices, which can produce strong shearing and squeezing effects during the crushing process, which is conducive to quickly crushing large pieces of material into small pieces. The hemispherical coal blocks have smooth edges, which reduce the resistance of the coal crushing rod 204 during use and avoid the jamming of the driving components. At the same time, the contact area between the material and the coal blocks is increased to improve the stability of operation. The truncated cone-shaped coal blocks have a larger contact area and a gentler inclination angle, which can provide a more uniform crushing force during the crushing process. Therefore, different types of coal blocks can be used according to different usage requirements to adapt to different coal quality processing.

[0048] In some embodiments, the driving component includes a first motor 202, a rotating rod 203 and a protective cover 201. The first motor 202 is arranged between the shell 1 and the protective cover 201. The protective cover 201 is connected to the shell 1. The output end of the first motor 202 extends out of the protective cover 201 and is connected to one end of the rotating rod 203. The other end of the rotating rod 203 is connected to the coal crushing rod 204.

[0049] Specifically, the first motor 202 is arranged in the protective cover 201 to prevent the material from damaging the first motor 202. The upper end of the rotating rod 203 is connected to the output end of the first motor 202, and the lower end of the rotating rod 203 is connected to the coal grinding rod. The protective cover 201 can protect the first motor 202 to prevent the internal residue from entering the first motor 202 during the coal grinding process. The rotating rod 203 is located between the first motor 202 and the coal grinding rod, and the first motor 202 drives the rotating rod 203 to rotate. When the first motor 202 is started, it generates a rotating power. This power is transmitted to the rotating rod 203 through the output end, so that the rotating rod 203 starts to rotate. As the rotating rod 203 rotates, it drives the coal crushing rod 204 to rotate together. The coal crushing blocks on the coal crushing rod 204 collide and squeeze with the material during the rotation process, thereby crushing the material.

[0050] In some embodiments, the coal mill further includes a protective tube 205, which is disposed between the filter plate 3 and the top of the housing 1, and the protective tube 205 is in contact with the inner wall of the accommodating cavity, so as to protect the inner wall of the accommodating cavity of the housing 1, reduce the wear of the housing 1 during use, and improve the stability and safety of the housing 1 during use.

[0051] In some embodiments, the discharge assembly 4 includes a discharge plate 406 and a telescopic component, one end of the discharge plate 406 is pivotally connected to the shell 1, and the other end of the discharge plate 406 is connected to the top of the telescopic component. The telescopic component is telescopic to allow the discharge plate 406 to rotate in the up and down directions relative to the shell 1, and the discharge plate 406 at least partially extends out of the outlet 106 of the shell 1.

[0052] The left end of the discharge plate 406 is pivotally connected to the shell 1, or a rotating shaft 407 is connected to the left end of the discharge plate 406, and the rotating shaft 407 is set on the shell 1. The right end of the discharge plate 406 is connected to the upper end of the telescopic component, and the telescopic component is telescoped in the up and down directions to allow the material above the discharge plate 406 to pass through the outlet 106 at the lower end of the shell 1 to be discharged by the device, and the right end of the discharge plate 406 can partially extend out of the outlet 106 of the shell 1.

[0053] Furthermore, a fixing plate 401 is provided at the lower end of the telescopic component, and the fixing plate 401 is connected to the housing 1 to fix the telescopic component.

[0054] In some embodiments, the discharge assembly 4 further includes a spring rod 408, one end of which is connected to the bottom of the shell 1, and the other end of the spring rod 408 is connected to the discharge plate 406. The spring rod 408 can play a certain supporting and buffering role when the discharge plate 406 falls, so as to prevent the discharge plate 406 from being damaged by the excessive weight of the coal blocks above. Furthermore, the lower end of the spring rod 408 is connected to a fixed block 409 connected to the bottom of the shell 1, and the fixed block 409 is used to support the spring rod 408.

[0055] In some embodiments, the telescopic component includes a sleeve 404, a threaded rod 403, a rotating ball 405 and a second motor 402. The second motor 402 is arranged on the shell 1, and the output end of the second motor 402 is connected to the threaded rod 403. The threaded rod 403 is threadedly connected to the sleeve 404. The end of the sleeve 404 away from the threaded rod 403 is connected to the rotating ball 405, and the rotating ball 405 is arranged at the bottom of the discharge plate 406.

[0056] The fixing plate 401 is used to fix the second motor 402. The second motor 402 drives the threaded rod 403 to perform threaded motion inside the sleeve 404, thereby driving the upper discharge plate 406 to perform lifting motion. The sleeve 404 rotates at the bottom of the discharge plate 406 through the rotating ball 405. Under normal conditions, the discharge plate 406 is parallel to the top of the discharge port.

[0057] Specifically, Figure 3 As shown, the top of the rotating ball 405 is movably connected to a discharge plate 406, and the left side of one side of the discharge plate 406 is movably connected to a rotating shaft 407, the middle of the lower surface of the discharge plate 406 is fixedly connected to a spring rod 408, and one end of the spring rod 408 is fixedly connected to a fixed block 409.

[0058] The discharge plate 406 will block the outlet 106 of the shell 1, and the discharge plate 406 rotates relative to the shell 1 through the rotating shaft 407. The spring rod 408 can play a certain supporting and buffering role when the discharge plate 406 falls, avoiding damage to the discharge plate 406 due to excessive weight of the coal blocks above. The fixed block 409 is used to support the spring rod 408.

[0059] When in use, the coal blocks that need to be ground are put into the filter plate 3 through the feed port, and the first motor 202 will drive the coal grinding rod to grind the coal blocks. The coal blocks after processing will first fall onto the filter plate 3, and the coal blocks that meet the requirements will fall onto the discharge plate 406. The second motor 402 can adjust the opening or closing of the discharge plate 406 to the outlet 106, and finally flow out through the discharge plate 406.

[0060] In some embodiments, there are multiple crushed coal assemblies 2, and the multiple crushed coal assemblies 2 are arranged in a matrix in the accommodating cavity.

[0061] There are four coal crushing assemblies 2, two of which are respectively located inside the housing 1. The driving components of the coal crushing assemblies 2 can rotate in different directions to increase the stirring and crushing effect on the coal. The driving components of the coal crushing assemblies 2 can rotate in the same direction to stir and crush the coal.

[0062] Furthermore, shock-absorbing springs 101 are provided at the four corners of the bottom of the shell 1, and the shock-absorbing springs 101 can play a certain degree of protection in the process of coal grinding of the shell 1. A bottom plate 102 is fixedly installed below the shock-absorbing spring 101, and four corners of the upper surface of the bottom plate 102 are provided with slots 103. The bottom of the shock-absorbing spring 101 is embedded in the inside of the slot 103, and the four corners of the bottom of the bottom plate 102 are fixedly connected with supporting feet 104, which support the shell 1. An inlet 105 is opened on the upper left side of the shell 1, and an outlet 106 is opened on the lower right side of the shell 1. A coal crushing assembly 2 is movably installed on the top of the shell 1, a filter plate 3 is provided in the middle of the shell 1, and a discharge assembly 4 is movably installed on the bottom of the shell 1.

[0063] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A coal grinding mill, characterized in that: include: A shell, wherein the shell has a receiving cavity and the top of the shell is provided with an inlet communicating with the receiving cavity; A coal crushing assembly, the coal crushing assembly is arranged in the accommodating cavity, and the coal crushing assembly comprises a driving component and a coal crushing rod, the driving component is arranged on the top of the shell, the output end of the driving component is connected to the coal crushing rod, the coal crushing rod is provided with a plurality of thread grooves, the plurality of thread grooves are threadedly arranged along the extension direction of the coal crushing rod, and a plurality of mounting convex surfaces are formed between the plurality of thread grooves; A plurality of crushed coal blocks, wherein the crushed coal blocks are arranged on the mounting convex surface, and the plurality of crushed coal blocks are arranged spirally and at intervals along the extending direction of the crushed coal rod; A filter plate and a discharge assembly are arranged in the accommodating cavity, wherein the filter plate is arranged at the lower end of the crushed coal assembly, an outlet is arranged at the bottom of the shell, and the discharge assembly is arranged at the lower end of the filter plate with the output end of the discharge assembly facing the outlet.

2. The coal pulverizer according to claim 1, characterized in that: The shape of the mounting convex surface is triangular, rectangular or semicircular.

3. The coal pulverizer according to claim 1, characterized in that: The distance between the top of the accommodating chamber and the filter plate is A, and 5m≤A≤6m, and the material height between the filter plate and the top of the accommodating chamber is 4. The coal pulverizer according to claim 1, characterized in that: The shape of the coal fragments is any one of a triangular pyramid, a hemispherical shape, a cone shape or a truncated cone shape.

5. The coal pulverizer according to claim 1, characterized in that: The driving component includes a first motor, a rotating rod and a protective cover. The first motor is arranged between the shell and the protective cover. The protective cover is connected to the shell. The output end of the first motor extends out of the protective cover and is connected to one end of the rotating rod. The other end of the rotating rod is connected to the coal crushing rod.

6. The coal pulverizer according to claim 5, characterized in that: It also includes a protective tube, which is arranged between the filter plate and the top of the shell, and the protective tube is in contact with the inner wall surface of the accommodating cavity.

7. The coal pulverizer according to claim 6, characterized in that: The discharge assembly includes a discharge plate and a telescopic component, one end of the discharge plate is pivotally connected to the shell, and the other end of the discharge plate is connected to the top of the telescopic component. The telescopic component is telescopic to allow the discharge plate to rotate in the up and down directions relative to the shell, and the discharge plate at least partially extends out of the shell outlet.

8. The coal pulverizer according to claim 7, characterized in that: The discharge assembly also includes a spring rod, one end of which is connected to the bottom of the shell body, and the other end of which is connected to the discharge plate.

9. The coal pulverizer according to claim 7, characterized in that: The telescopic component includes a sleeve, a threaded rod, a rotating ball and a second motor, the second motor is arranged on the shell, the output end of the second motor is connected to the threaded rod, the threaded rod is threadedly connected to the sleeve, the end of the sleeve away from the threaded rod is connected to the rotating ball, and the rotating ball is arranged at the bottom of the discharge plate.

10. The coal grinding mill according to any one of claims 1 to 9, characterized in that: There are multiple crushed coal assemblies, and the multiple crushed coal assemblies are arranged in a matrix in the accommodating cavity.

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