A crusher grate and crusher

Abstract

This invention discloses a crusher grate and a crusher, relating to the technical field of crushing equipment. The invention includes a cylinder; the cylinder comprises a fixed cylinder and a movable cylinder; flanges are fixedly connected to opposite ends of both the fixed and movable cylinders; positioning bolts are fixedly connected to the flange of the fixed cylinder; a first support frame is fixedly connected to the fixed cylinder; the first support frame is fixed to a base; a second support frame is fixedly connected to the movable cylinder; a trapezoidal slider is fixedly connected to the bottom of the second support frame; a trapezoidal groove is provided at the end of the base near the movable cylinder. According to the above connection method: when the hammer needs to be replaced, the positioning bolts fixed to the fixed cylinder are loosened, and the movable cylinder is pulled away from the fixed cylinder. Therefore, the movable cylinder moves along the trapezoidal groove. At this time, the movable cylinder separates from the fixed cylinder, and the hammer is pulled out of the movable cylinder, facilitating operation and reducing the difficulty of work for the operator.

Description

Technical Field

[0001] This invention relates to the field of crushing equipment technology, specifically a crusher grate and a crusher. Background Technology

[0002] A crusher is a device that crushes materials by impact. The material enters the crusher through the feed inlet and is impacted and collided by the high-speed rotating hammers. It then rushes at high speed against the impact plates and grate bars on the inner wall of the crusher. Through repeated impacts and collisions between materials, large particles are crushed into small particles.

[0003] The crusher mainly includes components such as a drive motor, a rotating shaft, hammers, and a grate. The drive motor drives the rotating shaft to rotate, which in turn drives the hammers to rotate. After the large particles are crushed by the high-speed rotating hammers, they need to be screened by the grate. Materials with qualified particle size can pass through the grate, otherwise they will continue to be crushed by the hammers until they reach the qualified particle size.

[0004] The grate is one of the important components of a crusher, and also one of its vulnerable parts. Because traditional crushers are all one-piece units, when the hammers or grate are damaged and need to be replaced or installed, the workers can only enter the crusher from the feed inlet and carry the grate and hammers in one by one for replacement or installation. The internal space of the crusher is small, and the grate and hammers are heavy, making installation in the confined space very inconvenient. Each replacement requires stopping the machine and consumes a lot of time, affecting production efficiency.

[0005] Therefore, a crusher grate and a crusher are proposed to address the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies and solve the problem that traditional pulverizers are all integrated units, requiring workers to enter the pulverizer through the feed inlet to remove and replace or install the grates or hammers one by one when the hammers or grate are damaged, which is inconvenient due to the limited internal space and the weight of the grates and hammers, and requires significant downtime for each replacement, thus impacting production efficiency, this invention proposes a pulverizer grate and pulverizer.

[0007] A crusher grate and a crusher, comprising a cylinder; the cylinder includes a fixed cylinder and a movable cylinder; a flange is fixedly connected to one end of each of the fixed cylinder and the movable cylinder; a positioning bolt is fixedly connected to the flange of the fixed cylinder; the movable cylinder is fixedly connected to the fixed cylinder via the positioning bolt; a first support frame is fixedly connected to the fixed cylinder; the first support frame is fixed to a base; a second support frame is fixedly connected to the movable cylinder; a trapezoidal slider is fixedly connected to the bottom of the second support frame; a trapezoidal groove is provided at one end of the base near the movable cylinder; the trapezoidal slider is slidably connected within the trapezoidal groove; a rotating shaft is rotatably connected to the center of the fixed cylinder and the movable cylinder; the rotating shaft passes through the fixed cylinder and the movable cylinder.

[0008] Preferably, a grate assembly is fixedly connected to one end of the rotating shaft near the fixed cylinder; a hammer assembly is fixedly connected to one end of the rotating shaft near the moving cylinder; a drive assembly is fixedly connected to one end of the rotating shaft extending out of the fixed cylinder; a discharge port is provided at the lower end of the fixed cylinder; and a feed port is provided at the upper end of the moving cylinder.

[0009] Preferably, the drive assembly includes a motor, a reducer, and pulleys; the reducer is fixedly connected to the base; the output shaft of the motor is fixedly connected to the input shaft of the reducer; two pulleys are provided; the two pulleys are respectively fixedly connected to the output shaft and the rotating shaft of the reducer.

[0010] Preferably, a first impact plate, a second impact plate, and a liner are sequentially fixedly connected to the inner wall of the movable cylinder; multiple liner plates are provided and are continuously and tightly fixed to the inner wall of the movable cylinder.

[0011] Preferably, the liner has a protrusion on the side facing the inside of the moving cylinder; the first and second counter-attack plates are disposed on one side of the moving cylinder.

[0012] Preferably, the hammer assembly includes a fixed rod and a hammer head; the fixed rod is fixedly connected to the rotating shaft in a circular array; a straight groove is formed at the distal end of the fixed rod; a T-shaped slider is fixedly connected to the hammer head; the T-shaped slider is slidably connected to the straight groove.

[0013] A crusher grate, suitable for the aforementioned crusher, wherein the crusher grate is the aforementioned middle grate assembly; the grate assembly includes an annular fixing frame and a fan-shaped grate; the annular fixing frame includes a fixing ring, a connecting ring, and a support rod; the connecting ring is fixedly connected to a rotating shaft; the connecting ring and the fixing ring are connected as one unit by the support rod.

[0014] Preferably, the outer wall of the fixing ring is slidably connected to the inner wall of the fixing cylinder; a plurality of fan-shaped gratings are fixedly connected in a ring array on the inner wall of the fixing ring; a plurality of arc-shaped holes are opened on the fan-shaped gratings; and a cleaning component is rotatably connected to the gratings.

[0015] Preferably, the cleaning assembly includes a rotating rod and a lever; the rotating rod is rotatably connected to the side of the fan-shaped grate facing the moving cylinder; the lever is fixed to the side of the rotating rod facing the fan-shaped grate and inserted into the arc-shaped hole; a stop block is fixedly connected to the other side of the lever.

[0016] Preferably, a torsion spring is fixedly connected between the rotating rod and the fan-shaped grate; the direction of rotation of the torsion spring is opposite to the direction of rotation of the rotating shaft.

[0017] The advantages of this invention are:

[0018] 1. This invention transforms the traditional one-piece crusher cylinder into a movable fixed cylinder and a movable cylinder. When the hammers inside the crusher become severely worn due to prolonged operation, the positioning bolts on the flange fixed to the fixed cylinder are loosened, and the movable cylinder is pulled away from the fixed cylinder. Because the trapezoidal slider at the bottom of the second support frame on the movable cylinder is slidably connected to the trapezoidal groove on the base, the movable cylinder moves along the trapezoidal groove. At this time, the movable cylinder separates from the fixed cylinder, exposing the hammers for easy replacement by operators, reducing crusher downtime and increasing crusher output.

[0019] 2. By making the hammer head detachable, when one side of the hammer head is severely worn and no longer usable after a period of use, the positioning bolts are loosened, and the moving cylinder is pulled to one side to pull the rotating shaft and hammer head out of the moving cylinder. The retaining springs on both sides of the T-shaped slider are loosened, and the hammer head is pulled out of the straight groove. It is rotated 180° so that the other side with less wear faces the impact plate. Then the hammer head is inserted into the straight groove. Since the hammer head needs to be replaced when it is damaged, there is no additional downtime for the crusher when changing the side of the hammer head. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall exploded structure of one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure when the movable cylinder and the fixed cylinder are separated according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the movable cylinder according to an embodiment of the present invention:

[0025] Figure 5 This is a schematic diagram of the structure of the rotating shaft, grate assembly, and hammer assembly according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the rotating shaft and hammer assembly according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of a grate assembly according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of a fan-shaped grate and cleaning assembly according to an embodiment of the present invention.

[0029] In the diagram: 1. Cylinder body; 11. Fixed cylinder; 111. First support frame; 112. Second support frame; 113. Trapezoidal slider; 12. Moving cylinder; 121. First impact plate; 122. Second impact plate; 123. Liner; 13. Flange; 14. Positioning bolt; 15. Base; 151. Trapezoidal groove; 2. Rotating shaft; 3. Grate assembly; 31. Fixed frame; 311. Fixed ring; 312. 313 Connecting ring; 32 Support rod; 32 Fan-shaped grate; 321 Arc-shaped hole; 33 Cleaning assembly; 331 Rotating rod; 332 Toggle rod; 333 Stop block; 34 Torsion spring; 4 Hammer assembly; 41 Fixed rod; 411 Straight groove; 42 Hammer; 421 T-shaped slider; 5 Drive assembly; 51 Motor; 52 Reducer; 53 Pulley; 6 Discharge port; 7 Feed port. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-8As shown, a crusher includes a cylinder 1; the cylinder 1 includes a fixed cylinder 11 and a movable cylinder 12; a flange 13 is fixedly connected to one end of each of the fixed cylinder 11 and the movable cylinder 12; a positioning bolt 14 is fixedly connected to the flange 13 of the fixed cylinder 11; the movable cylinder 12 is fixedly connected to the fixed cylinder 11 via the positioning bolt 14; a first support frame 111 is fixedly connected to the fixed cylinder 11; the first support frame 111 is fixed to a base 15; a second support frame 112 is fixedly connected to the movable cylinder 12; a trapezoidal slider 113 is fixedly connected to the bottom of the second support frame 112; the... A trapezoidal groove 151 is provided at one end of the base 15 near the moving cylinder 12; the trapezoidal slider 113 is slidably connected in the trapezoidal groove 151; a rotating shaft 2 is rotatably connected to the center of the fixed cylinder 11 and the moving cylinder 12; the rotating shaft 2 passes through the fixed cylinder 11 and the moving cylinder 12; a grate assembly 3 is fixedly connected to one end of the rotating shaft 2 near the fixed cylinder 11; a hammer assembly 4 is fixedly connected to one end of the rotating shaft 2 near the moving cylinder 12; a drive assembly 5 is fixedly connected to one end of the rotating shaft 2 extending out of the fixed cylinder 11; a discharge port 6 is provided at the lower end of the fixed cylinder 11; and a feed port 7 is provided at the upper end of the moving cylinder 12.

[0032] To facilitate easy replacement of the hammer assembly 4 and grate assembly 3 when they are damaged, thereby increasing the replacement speed and minimizing the downtime of the crusher, instead of feeding the hammer assembly 4 and grate assembly 3 one by one into the cylinder 1 through the feed inlet 7 and replacing them in the confined space of the cylinder 1, the cylinder 1 of the traditional integrated crusher is designed as a movable fixed cylinder 11 and a movable cylinder 12. When the hammer assembly 4 or grate assembly 3 is damaged, the flange fixed to the fixed cylinder 11 is loosened. Positioning bolt 14 on 13 and pull the moving cylinder 12 away from the fixed cylinder 11. Since the trapezoidal slider 113 at the bottom of the second support frame 112 on the moving cylinder 12 is slidably connected to the trapezoidal slide groove 151 on the base 15, the moving cylinder 12 will move along the trapezoidal slide groove 151. At this time, the moving cylinder 12 is separated from the fixed cylinder 11, and the grate assembly 3, hammer assembly 4, and drive assembly 5 are all exposed, which makes it convenient for the staff to replace them, reduces the downtime of the crusher, and increases the output of the crusher.

[0033] As one embodiment of the present invention, please refer to Figure 1 and Figure 3 As shown, the drive assembly 5 includes a motor 51, a reducer 52, and pulleys 53; the reducer 52 is fixedly connected to the base 15; the output shaft of the motor 51 is fixedly connected to the input shaft of the reducer 52; two pulleys 53 are provided; the two pulleys 53 are respectively fixedly connected to the output shaft of the reducer 52 and the rotating shaft 2; the two pulleys 53 are driven by a belt.

[0034] In order to ensure that the rotating shaft 2 has a continuous and stable power when it is working, a reducer 52 is set up. The reducer 52 reduces the speed output by the motor 51 and makes the rotating shaft 2 rotate through the pulley 53, making the rotating shaft 2 rotate more smoothly. At the same time, it ensures that the hammer head assembly 4 will not be damaged too quickly due to the excessive speed of the rotating shaft 2, and the phenomenon of frequent replacement of the hammer head assembly 4 will not occur.

[0035] Please refer to Figure 4 As shown, a first impact plate 121, a second impact plate 122, and a liner 123 are sequentially fixedly connected to the inner wall of the movable cylinder 12; multiple liners 123 are provided and are continuously and tightly fixed to the inner wall of the movable cylinder 12; a protrusion is provided on the side of the liner 123 facing the inside of the movable cylinder 12; the first impact plate 121 and the second impact plate 122 are provided on one side of the movable cylinder 12.

[0036] To achieve rapid material crushing and improve the crushing efficiency of the crusher, impact plates 121, 122, and multiple liners 123 are fixed on the inner wall of the moving cylinder 12. During operation, the drive assembly 5 starts first, causing the hammer assembly 4 and the grate assembly 3 to rotate. At this time, the material to be crushed enters the moving cylinder 12 from the feed inlet 7. The high-speed rotating hammer assembly 4 impacts and collides with the falling material. The material impacted by the hammer assembly 4 flies towards the impact plate 121. After colliding with the impact plate 121, the material bounces back and flies again in a parabolic trajectory. After impacting the hammer assembly 4, the material flies towards the second impact plate 122 again. After colliding with the second impact plate 122, the material bounces back to the hammer assembly 4. At this time, the material impacts the liner 123 after impacting the hammer assembly 4. Since the liner 123 is provided with protrusions, and the hammer assembly 4 moves relative to the liner 123 when it rotates, when the hammer assembly 4 passes the protrusions on the liner 123 during its rotation, the hammer assembly 4 impacts the material, thereby causing the material to collide with the protrusions, increasing the frequency of material impact, and improving the crushing efficiency of the crusher.

[0037] Please refer to Figure 2 , Figure 5 and Figure 6 As shown, the hammer assembly 4 includes a fixing rod 41 and a hammer head 42; the fixing rod 41 is fixedly connected to the rotating shaft 2 in a circular array; a straight groove 411 is provided at the distal end of the fixing rod 41; a T-shaped slider 421 is fixedly connected to the hammer head 42; the T-shaped slider 421 is slidably connected to the straight groove 411.

[0038] Since the impact plate 121 is generally fixed to the inner wall of the moving cylinder 12 and located on one side of the feed inlet 7, the hammer 42 can only rotate in one direction to impact and pound the material. This results in severe wear on one side of the hammer 42, while the other side rarely comes into contact with the material, causing uneven use of the hammer 42 and resulting in waste. Therefore, in order to enable both sides of the hammer 42 to be used and reduce economic losses, the hammer 42 is designed to be detachable. When one side of the hammer 42 is severely worn and can no longer be used after a period of use, the positioning bolt 14 is loosened and the moving cylinder 12 is pulled to one side. Pull the rotating shaft 2 and hammer 42 out of the moving cylinder 12, loosen the retaining rings on both sides of the T-shaped slider 421, pull the hammer 42 out of the straight groove 411, rotate it 180°, so that the other side with less wear faces the impact plate 121, and then insert the hammer 42 into the straight groove 411 and lock it with the retaining ring. Push the moving cylinder 12, insert the flange 13 on the moving cylinder 12 into the positioning bolt 14, and tighten the positioning bolt 14. Since the hammer 42 needs to be replaced when it is damaged, there is no additional downtime of the crusher when changing the side of the hammer 42.

[0039] Please refer to Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, the grate assembly 3 includes an annular fixing frame 31 and fan-shaped grate plates 32; the annular fixing frame 31 includes a fixing ring 311, a connecting ring 312, and a support rod 313; the connecting ring 312 is fixedly connected to the rotating shaft 2; the connecting ring 312 and the fixing ring 311 are connected as one unit by the support rod 313; the outer wall of the fixing ring 311 is slidably connected to the inner wall of the fixing cylinder 11; multiple fan-shaped grate plates 32 are fixedly connected in an annular array on the inner wall of the fixing ring 311; multiple arc-shaped holes 321 are opened on the fan-shaped grate plates 32; the... A cleaning assembly 33 is rotatably connected to the fan-shaped grate 32; the cleaning assembly 33 includes a rotating rod 331 and a lever 332; the rotating rod 331 is rotatably connected to the side of the fan-shaped grate 32 facing the moving cylinder 12; a torsion spring 34 is fixedly connected between the rotating rod 331 and the fan-shaped grate 32; the rotation direction of the torsion spring 34 is opposite to the rotation direction of the rotating shaft 2; the lever 332 is fixed to the side of the rotating rod 331 facing the fan-shaped grate 32 and inserted into the arc-shaped hole 321; a stop block 333 is fixedly connected to the other side of the lever 332;

[0040] To ensure the timely cleaning of the arc-shaped holes 321 on the fan-shaped grate 32 during material screening, preventing blockage and increasing the residence time of materials in the moving cylinder 12, allowing the hammers 42 to repeatedly hammer the materials and crush them to a smaller particle size, thus reducing the crushing efficiency of the crusher, the drive assembly 5 drives the rotating shaft 2 to rotate, which in turn drives the hammer assembly 4 to rotate. The hammer assembly 4 hammers the materials entering from the feed inlet 7. The materials impacted by the hammers 42 move at high speed and collide with the impact plate 121, then bounce back onto the hammers 42. After multiple impacts between the hammers 42 and the impact plate 121, the materials are crushed. As materials continuously enter from the feed inlet 7, the crushed materials are pushed into the fixed cylinder 11. The rotation of the rotating shaft 2 drives the fixed frame 31 to rotate, which in turn drives the fan-shaped grate 32 and the cleaning assembly. When the cleaning component 33 rotates, the stop block 333 comes into contact with the material in the fixed cylinder 11 and is blocked by the material. Since the rotation direction of the torsion spring 34 between the rotating rod 331 and the fan-shaped grate 32 is opposite to the rotation direction of the rotating shaft 2, when the stop block 333 is blocked by the material, the rotating rod 331 will drive the lever 332 to rotate in the arc-shaped hole 321 and tighten the torsion spring 34. When the fan-shaped grate 32 continues to rotate until it separates from the material, the torsion spring 34 is released. Under the elastic potential energy of the torsion spring 34, the rotating rod 331 rotates back and drives the lever 332 to rotate back. By the continuous back-and-forth rotation of the rotating rod 331 and the lever 332 in the arc-shaped hole 321, the material stuck in the arc-shaped hole 321 is released in time, avoiding the situation where the material stuck in the arc-shaped hole 321 for a long time is continuously hit by the subsequent material and becomes more and more stuck, making it more difficult to clean.

[0041] Working principle: The material to be crushed enters the moving cylinder 12 through the feed inlet 7. The motor 51 starts, and the reducer 52 reduces the speed of the motor 51. The reducer 52 drives the rotating shaft 2 through the pulley 53. The rotating shaft 2 drives the hammer assembly 4 and the grate assembly 3 to rotate. At this time, the high-speed rotating hammer 42 impacts and collides with the falling material. The material impacted by the hammer assembly 4 flies towards the first impact plate 121. After colliding with the first impact plate 121, the material rebounds and flies back towards the hammer 42 with a parabolic trajectory. After impacting the hammer 42 again, the material flies towards the second impact plate 122. After colliding with the second impact plate 122, the material rebounds back to the hammer assembly 4. At this time, the material impacts the liner 123 after impacting the hammer 42. Because the liner 123 is provided with protrusions, and the hammer assembly 4 moves relative to the liner 123 when rotating, when the hammer 42 passes over the protrusions on the liner 123 during rotation... Hammer 42 impacts the material, causing the material to collide with the protrusions, increasing the frequency of impact and improving the crushing efficiency. The crushed material is then screened by the grate assembly 3. Material with the correct particle size passes through the arc-shaped hole 321 on the fan-shaped grate 32 and is transported out of the fixed cylinder 11 through the discharge port 6. When the hammer 42 is severely worn due to long-term operation, the positioning bolt 14 on the flange 13 fixed to the fixed cylinder 11 is loosened, and the moving cylinder 12 is pulled away from the fixed cylinder 11. Since the trapezoidal slider 113 at the bottom of the second support frame 112 on the moving cylinder 12 is slidably connected to the trapezoidal groove 151 on the base 15, the moving cylinder 12 will move along the trapezoidal groove 151. At this time, the moving cylinder 12 separates from the fixed cylinder 11, and the grate assembly 3 and hammer 42 are exposed, making it convenient for staff to replace them and reducing the downtime of the crusher.

[0042] Since the structure of the motor is existing technology, it is not described in this invention document.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A pulverizer, characterized in that: Includes a cylindrical body (1); the cylindrical body (1) includes a fixed cylinder (11) and a movable cylinder (12); a flange (13) is fixedly connected to one end of both the fixed cylinder (11) and the movable cylinder (12); a positioning bolt (14) is fixedly connected to the flange (13) of the fixed cylinder (11); the movable cylinder (12) is fixedly connected to the fixed cylinder (11) by the positioning bolt (14); a first support frame (111) is fixedly connected to the fixed cylinder (11); the first support frame (111) is fixed to the base ( 15) On the moving cylinder (12); a second support frame (112) is fixedly connected to the moving cylinder (12); a trapezoidal slider (113) is fixedly connected to the bottom of the second support frame (112); a trapezoidal groove (151) is opened at one end of the base (15) near the moving cylinder (12); the trapezoidal slider (131) is slidably connected in the trapezoidal groove (151); a rotating shaft (2) is rotatably connected to the center of the fixed cylinder (11) and the moving cylinder (12); the rotating shaft (2) passes through the fixed cylinder (11) and the moving cylinder (12). A grate assembly (3) is fixedly connected to one end of the rotating shaft (2) near the fixed cylinder (11); a hammer assembly (4) is fixedly connected to one end of the rotating shaft (2) near the moving cylinder (12); a drive assembly (5) is fixedly connected to one end of the rotating shaft (2) extending out of the fixed cylinder (11); a discharge port (6) is provided at the lower end of the fixed cylinder (11); and a feed port (7) is provided at the upper end of the moving cylinder (12). The grate assembly (3) includes an annular fixing frame (31) and a fan-shaped grate (32); the annular fixing frame (31) includes a fixing ring (311), a connecting ring (312) and a support rod (313); the connecting ring (312) is fixedly connected to the rotating shaft (2); the connecting ring (312) and the fixing ring (311) are connected as one unit through the support rod (313); The outer wall of the fixing ring (311) is slidably connected to the inner wall of the fixing cylinder (11); a plurality of fan-shaped grates (32) are fixedly connected in a ring array on the inner wall of the fixing ring (311); a plurality of arc-shaped holes (321) are opened on the fan-shaped grates (32); a cleaning assembly (33) is rotatably connected to the grates (32). The cleaning assembly (33) includes a rotating rod (331) and a lever (332); the rotating rod (331) is rotatably connected to the side of the fan-shaped grate (32) facing the moving cylinder (12); the lever (332) is fixed to the side of the rotating rod (331) facing the fan-shaped grate (32) and inserted into the arc-shaped hole (321); a stop block (333) is fixedly connected to the other side of the lever (332). A torsion spring (34) is fixedly connected between the rotating rod (331) and the fan-shaped grate (32); the direction of rotation of the torsion spring (34) is opposite to the direction of rotation of the rotating shaft (2).

2. The pulverizer according to claim 1, characterized in that: The drive assembly (5) includes a motor (51), a reducer (52) and pulleys (53); the reducer (52) is fixedly connected to the base (15); the output shaft of the motor (51) is fixedly connected to the input shaft of the reducer (52); two pulleys (53) are provided; the two pulleys (53) are respectively fixedly connected to the output shaft and the rotating shaft (2) of the reducer (52).

3. A pulverizer according to claim 2, characterized in that: The inner wall of the movable cylinder (12) is sequentially fixedly connected with a first counterattack plate (121), a second counterattack plate (122), and a liner (123); multiple liner plates (123) are provided and are continuously and tightly fixed to the inner wall of the movable cylinder (12).

4. A pulverizer according to claim 3, characterized in that: The liner (123) has a protrusion on one side facing the inside of the moving cylinder (12); the first counterattack plate (121) and the second counterattack plate (122) are disposed on one side of the moving cylinder (12).

5. A pulverizer according to claim 4, characterized in that: The hammer assembly (4) includes a fixed rod (41) and a hammer (42); the fixed rod (41) is fixedly connected to the rotating shaft (2) in a circular array; a straight groove (411) is provided at the far end of the fixed rod (41); a T-shaped slider (421) is fixedly connected to the hammer (42); the T-shaped slider (421) is slidably connected to the straight groove (411).

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