Crushing device for silicon-carbon composite material

Abstract

The invention belongs to the technical field of battery negative electrode materials, and particularly relates to a crushing device for a silicon-carbon composite material. Comprising a shell, the interior of the shell comprises a crushing cavity and a grading cavity from bottom to top, the upper end of the crushing cavity is connected with a feeding pipe, the lower end of the crushing cavity is connected with air injection equipment, grading equipment is rotationally arranged in the grading cavity, and an output port of the grading equipment is connected with a discharging pipe; a lifting roller structure located at the upper end of the grading equipment is rotationally arranged in the grading cavity, and a cleaning ring structure which is driven by the lifting roller structure to ascend and descend along the inner wall of the shell is arranged in the smashing cavity. The purpose of cleaning the inner wall of the shell is achieved, the additionally-arranged structure does not occupy the space in the crushing cavity, high-pressure airflow cannot be disturbed, the powder crushing effect cannot be affected, and the beneficial effects of being convenient to operate and good in practicability are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery negative electrode materials, and in particular relates to a pulverizing device for silicon-carbon composite materials. Background Art

[0002] Negative electrode materials for lithium-ion batteries include carbon negative electrode materials, metal oxide negative electrode materials, alloy negative electrode materials, etc. In recent years, a series of new high-capacity negative electrode materials have been successfully developed to replace graphite, including tin dioxide, iron oxide, etc. Lithium alloy negative electrode materials also have high theoretical specific capacity, such as Sn, Sb, P, Si and Ge, which are much higher than the theoretical specific capacity of graphite, but metal oxide negative electrode materials and alloy negative electrode materials have the disadvantage of large volume changes during the cycle.

[0003] Silicon-carbon composites have become the negative electrode material with the greatest industrial prospects because they combine the long life of carbon and the high capacity of silicon. They have also become a research and development hotspot for major companies and university research institutes.

[0004] Silicon-carbon composite materials are made of a mixture of silicon particles and carbon materials. This combination can improve the performance of batteries. However, during the airflow crushing process, as the use time of the crushing machine increases, a large amount of impurities will accumulate on the inner wall of the crushing chamber, which may cause the impurity content of the silicon-carbon composite material to increase during the airflow crushing process, thereby reducing its performance. In addition, the micronized particles are prone to electrostatic force, which causes the micronized particles to collide with each other under the action of the airflow, resulting in "agglomeration" and "caking". The powder that is easy to agglomerate is easy to adhere to the inner wall and gradually occupy the internal space of the crushing chamber. When cleaning the powder attached to the inner wall of the crushing chamber of the traditional airflow crusher, the sealing cover of the machine needs to be removed first, and then the cleaning work is completed manually, which is not only time-consuming and labor-intensive, but also greatly increases the workload of the staff. At the same time, since the fine powder that meets the particle size needs to be discharged in the middle of the top during the airflow crushing work, how to remove the powder agglomerated on the cavity wall without affecting the discharge of the fine powder at the top needs to be solved urgently.

[0005] The document with authorization announcement number CN117619525B discloses an air flow pulverizing device for silicon-carbon composite materials in dry electrode powder, including a pulverizing chamber, an air nozzle and a feed port. A hidden cleaning mechanism is provided at the bottom of the pulverizing chamber, and the hidden cleaning mechanism is located below the air nozzle. The hidden cleaning mechanism includes an electric cylinder.

[0006] However, the device requires direct bottom modification of the original air flow pulverizing device, which is not only costly, but also the hidden structure connected to the pulverizing chamber at the bottom will interfere with the direction of the high-pressure airflow ejected from the original air nozzle, and the degree of powder pulverization will be affected. What is more serious is that the powder may accumulate at the bottom of the device, greatly reducing the speed of movement to the top of the device, and ultimately affecting the pulverizing effect and efficiency of the entire device. Summary of the invention

[0007] In view of the above-mentioned problems, the present invention provides a silicon-carbon composite material crushing device, which not only achieves the purpose of cleaning the inner wall of the shell through the arrangement of a lifting roller structure and a cleaning ring structure, but also the additional structure does not occupy the space inside the crushing chamber, will not disturb the high-pressure airflow and affect the crushing effect of the powder, and has the advantages of easy operation and good practicality.

[0008] In order to achieve the above object, the technical solution of the present invention is as follows: A pulverizing device for silicon-carbon composite materials comprises a shell, wherein the interior of the shell comprises a pulverizing chamber and a grading chamber from bottom to top, wherein the upper end of the pulverizing chamber is connected to a feed pipe, and the lower end of the pulverizing chamber is connected to an injection device, a grading device is rotatably arranged in the grading chamber, and an output port of the grading device is connected to a discharge pipe; a lifting roller structure located on the upper end of the grading device is rotatably arranged in the grading chamber, and a cleaning ring structure is arranged in the pulverizing chamber and is driven by the lifting roller structure and is lifted and lowered along the inner wall of the shell.

[0009] As a further preferred embodiment of the present invention, the lifting roller structure includes two rotating shafts respectively rotatably connected to the inner walls on both sides of the shell, two mounting disks respectively connected to the two rotating shafts, an axis body arranged between the two mounting disks, a wire reel arranged on the axis body, and a control wire wound on the wire reel and connected to the cleaning ring structure.

[0010] As a further preferred embodiment of the present invention, the wire drum includes a barrel, and two limit ring groups arranged on both ends of the barrel; the number of the control wires is two and they are respectively wound around the two limit ring groups.

[0011] As a further preferred embodiment of the present invention, the cleaning ring structure includes a rod body arranged parallel to the shaft body and connected to the control line, a ring body slidably connected to the inner wall of the shell, and a fixing member for connecting the rod body and the ring body.

[0012] As a further preferred embodiment of the present invention, the fixing member includes an extension plate connected to the lower end of the rod body, two mounting plates arranged at the lower end of the extension plate and opposite to each other, a fixing block rotatably arranged between the two mounting plates, and an inner rod arranged in the ring body, connected to the fixing block, and passing through the rotation center of the ring body.

[0013] As a further preferred embodiment of the present invention, the cleaning ring structure further includes a roller which is arranged at the end of the rod body and connected to the inner wall of the shell.

[0014] As a further preferred embodiment of the present invention, the cleaning ring structure further includes an arc-shaped cleaning plate arranged on the outer side of the ring body.

[0015] As a further preferred embodiment of the present invention, the shaft is slidably connected to the mounting plate; and a vibration structure is provided on the bobbin.

[0016] As a further preferred embodiment of the present invention, the vibration structure includes a fixing ring detachably connected to the bobbin, and a plurality of triggering rods radially distributed on the fixing ring and connected to the outer peripheral side of the grading impeller on the grading device.

[0017] As a further preferred embodiment of the present invention, the trigger rod includes a main rod, a groove arranged on the end of the main rod away from the fixing ring, a trigger protrusion slidably connected to the groove, and a support spring arranged on the bottom surface of the groove and connected to the trigger protrusion.

[0018] As a further preferred embodiment of the present invention, an annular groove for fixing the control line is provided on the outer peripheral side of the rod body.

[0019] As a further preferred embodiment of the present invention, the mounting plate is provided with a strip groove adapted to the shaft body.

[0020] As a further preferred embodiment of the present invention, the fixing ring includes two semi-ring bodies arranged opposite to each other, two connecting plates arranged at both ends of the semi-ring bodies, internal threaded holes arranged on the connecting plates, and connecting bolts adapted to the internal threaded holes.

[0021] The beneficial effects of the present invention are as follows: The lifting roller structure in the silicon-carbon composite material crushing device provided by the present invention cooperates with the cleaning ring structure, and the main part of the lifting roller structure is arranged at the upper end of the grading chamber and is distributed parallel to the grading equipment in the grading chamber, which achieves the purpose of controlling the lifting and lowering of the cleaning ring structure without interfering with the operation of the grading equipment.

[0022] The main structural part of the cleaning ring structure in the silicon-carbon composite material pulverizing device provided by the present invention is an annular structure fitted with the inner wall of the shell, and the annular structure is hollow inside and will not occupy the passing path of the powder.

[0023] The vibration structure in the silicon-carbon composite material crushing device provided by the present invention utilizes the power provided by the rotation of the grading device itself to drive the vibration of the lifting roller structure, so that the cleaning ring structure has the function of synchronous vibration during the lifting process, and can achieve a higher intensity cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 It is a structural schematic diagram of the present invention.

[0025] Attached Figure 2 It is a schematic diagram of the structure of the crushing chamber of the present invention.

[0026] Attached Figure 3 It is a three-dimensional structural schematic diagram of the lifting roller structure of the present invention.

[0027] Attached Figure 4 It is a schematic diagram of the three-dimensional structure of the cleaning ring structure of the present invention.

[0028] Attached Figure 5 It is a schematic diagram of the local structure of the main rod end of the present invention.

[0029] Description of the drawings: housing 1, lifting roller structure 2, cleaning ring structure 3, vibration structure 4; Crushing chamber 11, classification chamber 12, feeding pipe 13, jetting device 14, classification device 15, classification impeller 151, discharge pipe 16; Rotating shaft 21, mounting plate 22, shaft body 23, wire drum 24, control wire 25, dust shielding plate 26; Strip groove 221; Cylinder 241, limiting ring assembly 242; Rod body 31, ring body 32, fixing member 33, roller 34, arc cleaning plate 35, annular groove 36, positioning hole plate 37; Extension plate 331, mounting plate 332, fixing block 333, inner rod 334; A fixing ring 41 and a trigger rod 42; Semi-ring body 411, connecting plate 412, internal threaded hole 413, connecting bolt 414; Main rod 421 , groove 422 , trigger protrusion 423 , support spring 424 . DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1 A silicon-carbon composite material pulverizing device provided in this embodiment includes a shell 1, wherein the interior of the shell 1 includes a pulverizing chamber 11 and a grading chamber 12 from bottom to top, wherein the upper end of the pulverizing chamber 11 is connected to a feed pipe 13, and the lower end of the pulverizing chamber 11 is connected to an injection device 14, a grading device 15 is rotatably arranged in the grading chamber 12, and the output port of the grading device 15 is connected to a discharge pipe 16; a lifting roller structure 2 located at the upper end of the grading device 15 is rotatably arranged in the grading chamber 12, and a cleaning ring structure 3 is arranged in the pulverizing chamber 11, which is driven by the lifting roller structure 2 and rises and falls along the inner wall of the shell 1.

[0033] It can be understood that the pulverizing device provided by the present invention is an air flow pulverizing device, which pulverizes the raw materials through high-pressure air flow and discharges fine powder of a particle size in the middle and upper part of the device. The device specifically includes but is not limited to a shell 1, a pulverizing chamber 11, a grading chamber 2, an air jet device 14, a grading device 15, and a discharge pipe 16. Among them, the pulverizing chamber 11 and the grading chamber 12 are sealed and connected, the feed pipe 13 is connected to the opening provided on the outer wall of the shell 1, and the feed pipe 13 is tilted downward, and the top of the feed pipe 13 is connected to a feeding device. The feeding device, the air jet device and the grading device are all prior arts in the art, and the following are specific examples: the air jet device 14 at least includes structures such as an air inlet, an air bag, an input pipe, and a high-pressure nozzle, and the high-pressure nozzle is distributed in a ring shape at the bottom of the pulverizing chamber 11. The grading device 15 at least includes a rotating motor and a grading impeller 151. The rotating motor is arranged outside the shell 1. An opening communicating with the grading chamber 12 is arranged on the top of the shell 1 located at the grading chamber 12, and a cover is arranged at the opening. The grading impeller 151 has various specifications and is detachably connected to the inner wall of the grading chamber 12. The grading impeller 151 of different specifications can be selected and replaced through the opening, thereby achieving the purpose of screening powders of different particle sizes; the grading impeller 151 is rotatably connected to the inner wall of the shell 1 and placed horizontally. A plurality of screening rods distributed in a ring are arranged on the grading impeller 151. The gaps between the screening rods are used to screen the powder. The cavity in the screening rods stores qualified materials. A discharge port communicating with the discharge pipe 16 is arranged on the side wall of the shell 1 located at the grading chamber 12. The discharge port is connected to the inner cavity of the grading impeller 151 to output the qualified materials out of the shell 1.

[0034] It is worth noting that the roller body of the lifting roller structure 2 is located at the upper end of the grading impeller 151, and is connected to the cleaning ring structure 3 by means of a rope, a wire body or the like. The roller body is preferably connected to a motor arranged outside the housing 1, and the motor is a forward and reverse motor. This arrangement maximizes the avoidance of occupying the powder transportation space between the crushing chamber 11 and the grading chamber 12, and also avoids affecting the grading efficiency and grading effect of the grading device 151. The cleaning ring structure 3 is lifted and lowered under the control of the lifting roller structure 2, and the side end of the cleaning ring structure 3 is fitted with the inner wall of the housing 1 to achieve the purpose of removing the powder attached or agglomerated on the housing 1 during the lifting process. The main body of the cleaning ring structure 3 is an annular structure fitted with the inner wall of the housing 1, which not only ensures the cleaning effect of scraping off the powder on the inner wall of the housing 1, but also the inside of the ring body structure is hollow, with enough space for the crushed powder to pass through, because it will not interfere with the effect of the airflow crushing the raw materials, nor will it reduce the efficiency of the airflow in transporting the powder from the crushing chamber 11 to the grading chamber.

[0035] In this embodiment, the lifting roller structure 2 includes two rotating shafts 21 respectively connected to the inner walls on both sides of the shell 1, two mounting disks 22 respectively connected to the two rotating shafts 21, an axis body 23 arranged between the two mounting disks 22, a wire drum 24 arranged on the axis body 23, and a control wire 25 wound on the wire drum 24 and connected to the cleaning ring structure 3.

[0036] Among them, the two rotating shafts 21 and the shaft body 23 are located on the same horizontal line, the mounting plate 22 is fixedly connected to the shaft body 23, and the bobbin 24 is fixedly connected to the shaft body 23; therefore, under the drive of the forward and reverse motors, the two rotating shafts 21 drive the two mounting plates 22 to rotate, and further the shaft body 23 drives the bobbin 24 to rotate, so that the bobbin 24 can achieve the purpose of tightening / relaxing the control line 25. The control line 25 is wound on the bobbin 24, has two free ends, the two free ends are in the same direction, and are respectively located at the two ends of the bobbin 24, and are synchronously tightened or relaxed under the control of the bobbin 24; the two free ends of the control line 25 are located at the side ends of the grading impeller 151, and do not contact the grading impeller 151, so as to avoid the grading impeller 151 from winding around the control line 25 during the rotation process, thereby affecting the lifting and lowering of the cleaning ring structure 3.

[0037] As a preferred embodiment of the present invention, in order to ensure the stability of the cleaning ring structure 3, the bobbin 24 includes a barrel 241 and two limit ring groups 242 arranged at both ends of the barrel 241; the control wires 25 are two in number and are respectively wound on the two limit ring groups 242, and the two control wires 25 are wound in the same direction and are tightened or loosened synchronously under the control of the bobbin 24. Each limit ring group 242 includes at least two convex rings protruding from the surface of the barrel 241, and the space between the two convex rings is used to limit the winding position of the control wire 25, further improving the stability of the lifting and lowering of the control wire 25, and preventing the control wire 25 from interfering with the screening work of the grading impeller 151.

[0038] As a further preference of this embodiment, in order to prevent the powder from moving from the grading impeller 151 to the lifting roller structure 2 and further agglomerating and adhering to the lifting roller structure 2 to interfere with it, the lifting roller structure 2 also includes a dust shielding plate 26 arranged on the inner wall of the shell 1, located between the wire drum 24 and the grading impeller 151, and having a space for the control line 25 to pass through. The dust shielding plate 26 separates the grading chamber 12 into two independent spaces, the upper end of which is the installation space of the lifting roller structure 2, and the lower end is the working space of the grading device 15; the space on the dust shielding plate 26 for the control line 25 to pass through can be an opening; the dust shielding plate 26 can also be an annular frame, and dense bristles are distributed in the frame, and the bristles have the ability to deform, so the control line 25 can pass smoothly without affecting the dust isolation effect of the dust shielding plate 26.

[0039] In this embodiment, the cleaning ring structure 3 includes a rod body 31 arranged parallel to the shaft body 23 and connected to the control line 25, a ring body 32 slidingly connected to the inner wall of the shell 1, a fixing part 33 for connecting the rod body 31 and the ring body 32, a roller 34 arranged at the end of the rod body 31 and connected to the inner wall of the shell 1, and an arc-shaped cleaning plate 35 arranged on the outer surface of the ring body 32.

[0040] Among them, the rod body 31 serves as a connection node, and its functions are: first, completing the connection with the control line 25; second, strengthening the stability of the lifting and lowering of the rod body 31 through the connection between the roller 34 and the inner wall of the shell 1, ensuring the cleaning effect of the ring body 32; third, limiting the highest point of the lifting of the ring body 32 to avoid entering the grading chamber 12 and affecting the grading of the powder.

[0041] The ring body 32 is preferably a metal ring body, which has the advantage that the metal material has a large deadweight and strong stability, which is convenient for improving the cleaning effect. Furthermore, without affecting the powder passing rate, a counterweight block can be set on the ring body 32, which is used to increase the deadweight of the ring body and help maintain the balance of the ring body.

[0042] There are at least two arc-shaped cleaning plates 35 , and the curvature of the cleaning plate surface fits the inner wall of the shell 1 to compensate for the small contact area between the ring body 32 and the inside of the shell 1 , thereby improving the cleaning efficiency.

[0043] As a further preferred embodiment of the present invention, an annular groove 36 for fixing the control line 25 is provided on the outer peripheral side of the rod body 31. The cleaning ring structure 3 further includes a positioning hole plate 37 provided on the inner wall of the housing 1, located at the upper end of the wire barrel 24 of the rod body 31, and having a space for the control line 25 to pass through. The annular groove 36 and the positioning hole plate 37 have the same purpose, that is, to improve the stability of the lifting and lowering of the control line 25.

[0044] Compared with the prior art, the pulverizing device provided in this embodiment has the following advantages: through the arrangement of the lifting roller structure and the cleaning ring structure, not only the purpose of cleaning the inner wall of the shell is achieved, but also the additional structure does not occupy the space inside the pulverizing chamber, and will not disturb the high-pressure airflow and affect the pulverizing effect of the powder. It has the advantages of easy operation and good practicality.

[0045] Example 2 This embodiment is structurally modified on the basis of the embodiment 1, specifically including: The fixing member 33 includes an extension plate 331 connected to the lower end of the rod body 31, two mounting plates 332 arranged at the lower end of the extension plate 331 and opposite to each other, a fixing block 333 rotatably arranged between the two mounting plates 332, and an inner rod 334 arranged in the ring body 32, connected to the fixing block 333, and passing through the rotation center of the ring body 32.

[0046] The working principle of the crushing device provided in this embodiment is as follows: the cleaning ring structure can be used during crushing operation. When the ring body 32 descends into the crushing chamber, the high-pressure airflow acts on the ring body 32 and the inner rod 334, and the ring body 32 drives the fixed block 333 to rotate between the two mounting plates 332. When the ring body 32 rotates to the highest position where the ring body 32 is restricted, the gravitational potential energy of the ring body 32 increases, and the ring body 32 moves in the opposite direction, and finally the ring body 32 is in a reciprocating swinging motion state. At this time, the contact area between the ring body 32, especially the arc-shaped cleaning plate 35 on the ring body 32 and the inner wall of the shell 1 increases, which helps to improve the cleaning efficiency.

[0047] Example 3 This embodiment is structurally modified based on the embodiment 1 or the embodiment 2, and specifically includes: The shaft body 23 is slidably connected to the mounting plate 22. Specifically, a strip groove 221 adapted to the shaft body 23 is provided on the mounting plate 22; and a vibration structure 4 is provided on the bobbin 24. The vibration structure 4 includes a fixing ring 41 detachably connected to the bobbin 24, and a plurality of trigger rods 42 radially distributed on the fixing ring 41 and connected to the outer peripheral side of the grading impeller 151 on the grading device 15. The number of the trigger rods is at least two, preferably in the range of 3 to 5. A single trigger rod 42 includes a main rod 421, a groove 422 provided on the end of the main rod 421 away from the fixing ring 41, a trigger protrusion 423 slidably connected to the groove 422, and a support spring 424 provided on the bottom surface of the groove 422 and connected to the trigger protrusion 433.

[0048] Among them, the function of the vibration structure 4 is to utilize the rotation of the grading impeller 151 to transmit power to the bobbin 24, push the bobbin 24 to move along the strip groove 221 on the mounting plate 22, and then reset due to gravity, forming a reciprocating motion in a smaller range, and finally making the bobbin 24 have a macroscopic vibration effect. Therefore, driven by the bobbin 24, the control line 25 further drives the ring body 32 to vibrate, and the vibration can further enhance the strong cleaning of the agglomerated and adhered powder on the inner wall of the shell, thereby ultimately achieving the purpose of improving the cleaning effect.

[0049] In this embodiment, the working principle of the vibration structure 4 and the grading impeller 151 is as follows: the trigger protrusion 423 located at the lower end of the bobbin 24 is inserted into the gap of the screening rod on the grading impeller 151 under the action of the support spring 424. After the grading impeller 151 rotates, the screening rod squeezes the trigger protrusion 423 to cause the main rod 421 to lift the bobbin 24. After the screening rod acts on the trigger protrusion 423, the trigger protrusion 423 compresses the support spring 424 and then shrinks into the groove 422, so that the main rod 421 has a certain buffering effect, reducing the wear between the main rod 421 and the screening rod.

[0050] As a further preferred embodiment of the present invention, the fixing ring 41 includes two oppositely disposed semi-ring bodies 411, two connecting plates 412 disposed at both ends of the semi-ring bodies 411, internal threaded holes 413 disposed on the connecting plates 412, and connecting bolts 414 adapted to the internal threaded holes 413. Such an arrangement has the advantage of facilitating the disassembly of the vibration structure 4 and facilitating the adjustment of the specifications of the vibration structure 4, thereby adapting to grading impellers of different specifications.

[0051] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A pulverizing device for silicon-carbon composite materials, comprising a housing (1), wherein the housing (1) comprises a pulverizing chamber (11) and a grading chamber (12) from bottom to top, wherein the upper end of the pulverizing chamber (11) is connected to a feed pipe (13), the lower end of the pulverizing chamber (11) is connected to an air jet device (14), a grading device (15) is rotatably arranged in the grading chamber (12), and the output port of the grading device (15) is connected to a discharge pipe (16); characterized in that: A lifting roller structure (2) located at the upper end of the grading device (15) is rotatably arranged in the grading chamber (12), and a cleaning ring structure (3) is arranged in the crushing chamber (11) and is driven by the lifting roller structure (2) and is lifted and lowered along the inner wall of the shell (1).

2. A comminution device for silicon-carbon composite materials according to claim 1, characterized in that: The lifting roller structure (2) comprises two rotating shafts (21) respectively rotatably connected to the inner walls on both sides of the shell (1), two mounting plates (22) respectively connected to the two rotating shafts (21), an axis (23) arranged between the two mounting plates (22), a wire drum (24) arranged on the axis (23), and a control wire (25) wound around the wire drum (24) and connected to the cleaning ring structure (3).

3. A pulverizing device for silicon-carbon composite materials according to claim 2, characterized in that: The wire drum (24) comprises a barrel (241) and two limit ring groups (242) arranged at two ends of the barrel (241); the control wires (25) are two in number and are respectively wound around the two limit ring groups (242).

4. A pulverizing device for silicon-carbon composite materials according to claim 2, characterized in that: The cleaning ring structure (3) comprises a rod body (31) arranged parallel to the shaft body (23) and connected to the control line (25), a ring body (32) slidably connected to the inner wall of the housing (1), and a fixing member (33) for connecting the rod body (31) and the ring body (32).

5. A pulverizing device for silicon-carbon composite materials according to claim 4, characterized in that: The fixing member (33) comprises an extension plate (331) connected to the lower end of the rod body (31), two mounting plates (332) arranged at the lower end of the extension plate (331) and arranged opposite to each other, a fixing block (333) rotatably arranged between the two mounting plates (332), and an inner rod (334) arranged in the ring body (32), connected to the fixing block (333) and passing through the rotation center of the ring body (32).

6. A pulverizing device for silicon-carbon composite materials according to claim 4, characterized in that: The cleaning ring structure (3) further comprises a roller (34) which is arranged at the end of the rod body (31) and connected to the inner wall of the housing (1).

7. The pulverizing device for silicon-carbon composite material according to claim 4, characterized in that: The cleaning ring structure (3) further comprises an arc-shaped cleaning plate (35) arranged on the outer side surface of the ring body (32).

8. The pulverizing device for silicon-carbon composite material according to claim 2, characterized in that: The shaft body (23) is slidably connected to the mounting plate (22); and a vibration structure (4) is provided on the bobbin (24).

9. A pulverizing device for silicon-carbon composite materials according to claim 8, characterized in that: The vibration structure (4) comprises a fixing ring (41) detachably connected to the bobbin (24), and a plurality of triggering rods (42) radially distributed on the fixing ring (41) and connected to the outer peripheral side of a grading impeller (151) on the grading device (15).

10. A pulverizing device for silicon-carbon composite materials according to claim 9, characterized in that: The trigger rod (42) comprises a main rod (421), a groove (422) arranged on the end of the main rod (421) away from the fixing ring (41), a trigger protrusion (423) slidably connected to the groove (422), and a support spring (424) arranged on the bottom surface of the groove (422) and connected to the trigger protrusion (433).

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