Sieving device of silicon carbide granulator

Abstract

The utility model discloses a silicon carbide granulator screening device which comprises a first screening mechanism used for screening silicon carbide particles larger than the standard size and a second screening mechanism used for screening silicon carbide particles smaller than the standard size, and shells are arranged on the first screening mechanism and the second screening mechanism. A screening plate used for screening silicon carbide particles and an anti-blocking assembly used for cleaning the screening plate are arranged in the shell, and the screening plate is located above the anti-blocking assembly. A vibration assembly used for driving the screening plate to vibrate up and down in the Y-axis direction is arranged in the middle area between the upper surface of the screening plate and the top end in the shell. According to the silicon carbide particle screening device, the situation that silicon carbide particles block the screening holes when the silicon carbide particles are screened is avoided, the silicon carbide particles blocked in the screening holes do not need to be manually cleaned, and therefore the silicon carbide particle screening efficiency is improved, and the workload of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide particle screening technology, specifically a screening device for a silicon carbide granulator. Background Technology

[0002] During the production and processing of silicon carbide particles, a granulator is needed to granulate them. After the silicon carbide material is granulated, a screening device is needed to screen the silicon carbide particles to remove silicon carbide particles that are larger than the standard size and silicon carbide particles that are smaller than the standard size.

[0003] A search revealed that patent publication number CN217069574U discloses a filtration and screening device for screening finished silicon carbide by size. This device belongs to the technical field of finished silicon carbide filtration and screening devices. The key technical features include a first screening box. Vibration of a large and a small screening plate allows for uniform screening of the silicon carbide on its upper surface. Larger particles enter the collection bin with the vibration of the large and small screening plates, while smaller particles fall into the screening bin through the small screening plate. Specifically, the controller energizes an electromagnet on one side, generating a magnetic field that attracts a magnetic ball towards the energized electromagnet, causing a moving rod to move along a chute. When the electromagnet is de-energized, the moving rod returns to its original position under the elastic action of a second spring. Therefore, by continuously energizing and de-energizing the two electromagnets, the screening bin vibrates back and forth, achieving the effect of screening the finished silicon carbide by size.

[0004] In the actual screening process of existing silicon carbide granulators, silicon carbide particles can clog the screening holes on the screening structure. When there is a lot of clogging on the screening holes, it will affect the screening effect of silicon carbide particles. Moreover, the staff needs to frequently clean the clogged screening holes on the screening structure, which not only affects the working efficiency of silicon carbide screening, but also increases the workload of the staff. Therefore, a silicon carbide granulator screening device is designed. Utility Model Content

[0005] In view of the defects or deficiencies of the screening device in silicon carbide granulation machine, the purpose of this utility model is to provide a screening device for silicon carbide granulation machine, which avoids the situation where silicon carbide particles clog the screening holes during screening, and eliminates the need for manual cleaning of the silicon carbide particles clogging the screening holes, thereby improving the screening efficiency of silicon carbide particles and reducing the workload of workers.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] The present invention provides a screening device for a silicon carbide granulator, comprising a first screening mechanism for screening silicon carbide particles larger than the standard particle size and a second screening mechanism for screening silicon carbide particles smaller than the standard particle size.

[0008] Both the first and second screening mechanisms are provided with a housing. Inside the housing, there is a screening plate for screening silicon carbide particles and an anti-clogging component for cleaning the screening plate. The screening plate is located above the anti-clogging component. A vibration component for driving the screening plate to vibrate up and down in the Y-axis direction is provided in the middle area between the upper surface of the screening plate and the top of the housing. At the four corners between the upper surface of the screening plate and the top of the housing, there are spring-back components for the screening plate to rebound in the Y-axis direction.

[0009] Preferably, the first screening mechanism and the second screening mechanism are both installed on the top of the mounting frame, and the first screening mechanism is located above the second screening mechanism. A feed inlet is provided on one side of the top of the housing, and a discharge outlet is provided on the other side of the bottom of the housing. A discharge trough is provided on one side of the outer wall of the housing, and a safety door is provided on the rear wall of the housing. The discharge outlet of the first screening mechanism is located on top of the second screening mechanism, and the discharge outlets of the first screening mechanism and the second screening mechanism are connected.

[0010] Preferably, the outer wall of the screening plate is fitted with the inner wall of the shell with a clearance, the surface of the screening plate is provided with screening holes distributed in a rectangular array, and T-shaped connecting grooves are provided on both sides of the upper surface of the screening plate.

[0011] Preferably, the vibration assembly is composed of a geared motor, a first rotating shaft, and two cams. The two cams are installed at the front and rear ends of the outer wall of the first rotating shaft, and the two cams are respectively located at the front and rear ends above the screening plate. One end of the first rotating shaft extends to the outside through a bearing on the front wall of the housing and is connected to the geared motor through a coupling. The geared motor is installed on a support block on the front wall of the housing.

[0012] Preferably, the anti-blocking component is provided with a movable plate, and the movable plate is located inside the housing. A threaded hole is opened at the center of the outer wall of the movable plate, and a second rotating shaft is installed in the threaded hole. One end of the second rotating shaft is installed in a bearing on one side of the outer wall of the housing, and the other end of the second rotating shaft extends through the bearing on the other side of the outer wall of the housing to the outside and is connected to a stepper motor through a coupling. The stepper motor is installed on a support block on the other side of the outer wall of the housing.

[0013] The outer wall of the second rotating shaft is provided with an external thread, and the external thread on the outer wall of the second rotating shaft is threadedly engaged with the threaded hole on the moving plate. The front end and the rear end of the outer wall of the moving plate are provided with a second through hole. A guide rod is installed in the second through hole. The outer wall of the guide rod is clearance-fitted with the hole wall of the second through hole, and the two ends of the guide rod are respectively installed on the inner walls of both sides inside the housing.

[0014] Touch rods are installed on both outer walls of the movable plate, and limit switches are installed on both inner walls of the housing.

[0015] Preferably, the upper surface of the movable plate is connected to the mounting plate via a compression structure, and the upper surface of the mounting plate is equipped with elastic top blocks arranged in a rectangular array. The compression structure is provided with a fourth connecting post, the bottom end of which is mounted on the upper surface of the movable plate. A second mounting groove is provided at the center of the top of the fourth connecting post, and a third connecting plate is provided in the second mounting groove. The outer circumferential wall of the third connecting plate and the inner circumferential wall of the second mounting groove are in clearance fit. A third spring is provided between the lower surface of the third connecting plate and the bottom end of the second mounting groove. The upper surface of the third connecting plate is equipped with a third connecting post, and the other end of the third connecting post is mounted on the lower surface of the mounting plate.

[0016] The third connecting plate has a second limiting block arranged in a ring array on its outer circumferential wall. The other end of the second limiting block is installed in the second limiting groove. The outer wall of the second limiting block and the groove wall of the second limiting groove are in clearance fit. The second limiting groove is arranged in a ring array on the inner circumferential wall of the second mounting groove.

[0017] Preferably, the rebound assembly is provided with a first connecting post, the top end of the first connecting post is installed inside the top end of the housing, the first connecting post has a first mounting groove inside, a second connecting plate is provided in the first mounting groove, and the outer circumferential wall of the second connecting plate and the inner circumferential wall of the first mounting groove are clearance fit. The lower surface of the second connecting plate is installed with a second connecting post, and the other end of the second connecting post extends to the outside through a first through hole and is connected to a T-shaped connecting block through the first connecting plate. The first through hole is opened at the center of the bottom end of the first connecting post, and the outer wall of the second connecting post and the hole wall of the first through hole are clearance fit.

[0018] The second connecting plate has a first limiting block arranged in a ring array on its outer circumferential wall. The first limiting block is installed in the first limiting groove. The outer wall of the first limiting block and the groove wall of the first limiting groove are in clearance fit. The first limiting groove is arranged in a ring array on the inner circumferential wall of the first mounting groove. A first spring is provided between the upper surface of the second connecting plate and the top of the first mounting groove. A second spring is provided between the lower surface of the second connecting plate and the bottom of the first mounting groove. The second spring is sleeved on the outer side of the outer wall of the second connecting column.

[0019] Preferably, the T-shaped connecting block is installed in the T-shaped connecting groove, and the outer wall of the T-shaped connecting block and the groove wall of the T-shaped connecting groove are in clearance fit.

[0020] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0021] In this invention, through a series of coordinated structural arrangements, when screening silicon carbide particles, the first screening mechanism can screen silicon carbide particles larger than the standard size, and the second screening mechanism can screen silicon carbide particles smaller than the standard size, thereby achieving the screening of silicon carbide particles. During the screening process, silicon carbide particles larger than the inner diameter of the screening holes will block the screening holes. When the stepper motor on the anti-blocking component is started, it will indirectly drive the elastic top block to move. With the coordination of the elastic top block's movement and the up-and-down vibration of the screening plate, the elastic top block can push out the silicon carbide particles blocking the screening holes. Thus, this invention avoids the situation where silicon carbide particles block the screening holes during screening, eliminating the need for manual cleaning of the blocked silicon carbide particles in the screening holes, thereby improving the efficiency of silicon carbide particle screening and reducing the workload of workers. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0024] Figure 2 This is a cross-sectional view of the first and second screening mechanisms of this utility model.

[0025] Figure 3 This is a longitudinal sectional view of the first and second screening mechanisms of this utility model.

[0026] Figure 4 This is a schematic diagram of the anti-clogging component of this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the vibration component of this utility model.

[0028] Figure 6 This is a schematic diagram of the compression structure of this utility model.

[0029] Figure 7 This is a cross-sectional view of the compression mechanism of this utility model.

[0030] Figure 8This is a schematic diagram of the structure of the springback assembly of this utility model.

[0031] Figure 9 This is a cross-sectional view of the spring-loaded assembly of this utility model.

[0032] Figure 10 This is a schematic diagram of the structure of the first screening mechanism and the second screening mechanism of this utility model.

[0033] Figure 11 This is a schematic diagram of the structure of the screening plate of this utility model.

[0034] In the picture:

[0035] 100. Mounting bracket;

[0036] 200. First screening mechanism;

[0037] 210. Rebound assembly; 211. First connecting post; 2111. First limiting groove; 2112. First mounting groove; 2113. First through hole; 212. Second connecting post; 213. First connecting plate; 214. T-shaped connecting block; 215. First spring; 216. Second connecting plate; 2161. First limiting block; 217. Second spring;

[0038] 220. Shell; 221. Inlet; 222. Outlet chute; 223. Outlet;

[0039] 230. Vibration assembly; 231. Gear motor; 232. First rotating shaft; 233. Cam;

[0040] 240. Screening plate; 241. T-shaped connecting groove; 242. Screening hole;

[0041] 250. Anti-blocking component; 251. Stepper motor; 252. Second rotating shaft; 253. Moving plate; 2531. Contact rod; 2532. Threaded hole; 2533. Second through hole; 254. Mounting plate; 255. Elastic top block; 256. Compression structure; 2561. Third connecting post; 2562. Third connecting plate; 2563. Fourth connecting post; 2564. Second limiting block; 2565. Third spring; 2566. Second limiting groove; 2567. Second mounting groove; 257. Guide rod;

[0042] 300. Second screening mechanism. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] like Figure 1-11 As shown, a silicon carbide granulator screening device includes a first screening mechanism 200 for screening silicon carbide particles larger than the standard particle size and a second screening mechanism 300 for screening silicon carbide particles smaller than the standard particle size.

[0047] Both the first screening mechanism 200 and the second screening mechanism 300 are provided with a housing 220. Inside the housing 220, there is a screening plate 240 for screening silicon carbide particles and an anti-clogging component 250 for cleaning the screening plate 240. The screening plate 240 is located above the anti-clogging component 250. A vibration component 230 for driving the screening plate 240 to vibrate up and down in the Y-axis direction is provided in the middle area between the upper surface of the screening plate 240 and the top of the inside of the housing 220. At the four corners between the upper surface of the screening plate 240 and the top of the inside of the housing 220, there are springback components 210 for the screening plate 240 to spring back in the Y-axis direction.

[0048] The first screening mechanism 200 and the second screening mechanism 300 are both installed on the top of the mounting frame 100, with the first screening mechanism 200 located above the second screening mechanism 300. A feed inlet 221 is provided on one side of the top of the housing 220, and a discharge outlet 223 is provided on the other side of the bottom of the housing 220. A discharge trough 222 is provided on one outer wall of the housing 220, and a safety door is provided on the rear wall of the housing 220. The safety door facilitates the cleaning, replacement, or maintenance of the internal structure of the housing 220 by the staff. The discharge outlet 223 on the first screening mechanism 200 is located on the top of the second screening mechanism 300, and the discharge outlet 223 on the first screening mechanism 200 and the discharge outlet 223 on the second screening mechanism 300 are connected.

[0049] The outer wall of the screening plate 240 is fitted with the inner wall of the housing 220 with a clearance fit. Because of the clearance fit between the outer wall of the screening plate 240 and the inner wall of the housing 220, the screening plate 240 can play a limiting and guiding role when it vibrates up and down in the Y-axis direction. The surface of the screening plate 240 is provided with screening holes 242 distributed in a rectangular array, and T-shaped connecting grooves 241 are provided on both sides of the upper surface of the screening plate 240. The screening holes 242 on the first screening mechanism 200 are larger than the screening holes 242 on the second screening mechanism 300.

[0050] The vibration assembly 230 is composed of a geared motor 231, a first rotating shaft 232, and two cams 233. The two cams 233 are installed at the front and rear ends of the outer wall of the first rotating shaft 232, and are respectively located at the front and rear ends above the screening plate 240. One end of the first rotating shaft 232 extends to the outside through a bearing on the front wall of the housing 220 and is connected to the geared motor 231 through a coupling. The geared motor 231 is installed on a support block on the front wall of the housing 220. When the geared motor 231 starts, it drives the first rotating shaft 232 to rotate. When the first rotating shaft 232 rotates, it drives the cams 233 to rotate. When the cams 233 rotate, they cause reciprocating compression on the screening plate 240 in the Y-axis direction.

[0051] The anti-blocking component 250 is provided with a movable plate 253, which is located inside the housing 220. A threaded hole 2532 is opened at the center of the outer wall of the movable plate 253. A second rotating shaft 252 is installed in the threaded hole 2532. One end of the second rotating shaft 252 is installed in a bearing on one side of the outer wall of the housing 220. The other end of the second rotating shaft 252 extends through the bearing on the other side of the outer wall of the housing 220 to the outside and is connected to the stepper motor 251 through a coupling. The stepper motor 251 is installed on a support block on the other side of the outer wall of the housing 220. When the stepper motor 251 is started, it will drive the second rotating shaft 252 to rotate forward or in reverse.

[0052] The outer wall of the second rotating shaft 252 is provided with an external thread, and the external thread on the outer wall of the second rotating shaft 252 is threadedly engaged with the threaded hole 2532 on the moving plate 253. Because the external thread on the outer wall of the second rotating shaft 252 is threadedly engaged with the threaded hole 2532 on the moving plate 253, the moving plate 253 will move to the left or right along the outer wall of the second rotating shaft 252 when the second rotating shaft 252 rotates forward or backward. The front end and the rear end of the outer wall of the moving plate 253 are provided with second through holes 2533. A guide rod 257 is installed in the second through hole 2533. The outer wall of the guide rod 257 is clearance-fitted with the hole wall of the second through hole 2533, and the two ends of the guide rod 257 are respectively installed on the inner walls of the two sides inside the housing 220. Because the outer wall of the guide rod 257 is clearance-fitted with the hole wall of the second through hole 2533, it can play a role in limiting and guiding the movement of the moving plate 253.

[0053] Touch rods 2531 are installed on both outer walls of the movable plate 253, and limit switches are installed on both inner walls of the housing 220. The combination of touch rods 2531 and limit switches allows the movable plate 253 to automatically reciprocate along the outer wall of the second rotating shaft 252, thereby driving the elastic top block 255 to reciprocate in a certain direction.

[0054] The upper surface of the movable plate 253 is connected to the mounting plate 254 via a compression structure 256. The upper surface of the mounting plate 254 is equipped with elastic top blocks 255 arranged in a rectangular array. Due to the compression structure 256, when the screening plate 240 exerts a certain force on the elastic top blocks 255, the elastic top blocks 255 will move downwards under the action of the compression structure 256, preventing them from being crushed by the screening plate 240. A fourth connecting column 2563 is provided on the compression structure 256. The bottom end of the fourth connecting column 2563 is mounted on the upper surface of the movable plate 253, and a second mounting groove 25 is formed at the center of the top end of the fourth connecting column 2563. 67. A third connecting plate 2562 is provided in the second mounting groove 2567, and the outer circumferential wall of the third connecting plate 2562 and the inner circumferential wall of the second mounting groove 2567 are in clearance fit. A third spring 2565 is provided between the lower surface of the third connecting plate 2562 and the bottom end of the second mounting groove 2567. A third connecting post 2561 is installed on the upper surface of the third connecting plate 2562, and the other end of the third connecting post 2561 is installed on the lower surface of the mounting plate 254. Because the outer circumferential wall of the third connecting plate 2562 and the inner circumferential wall of the second mounting groove 2567 are in clearance fit, the movement of the third connecting plate 2562 can be limited and guided.

[0055] The third connecting plate 2562 has a second limiting block 2564 arranged in a ring array on its outer circumferential wall. The other end of the second limiting block 2564 is installed in the second limiting groove 2566. The outer wall of the second limiting block 2564 and the groove wall of the second limiting groove 2566 are in clearance fit. The second limiting groove 2566 is arranged in a ring array on the inner circumferential wall of the second mounting groove 2567. Because the outer wall of the second limiting block 2564 and the groove wall of the second limiting groove 2566 are in clearance fit, the movement of the third connecting plate 2562 can be further limited and guided.

[0056] The spring-loaded assembly 210 is provided with a first connecting post 211. The top end of the first connecting post 211 is installed inside the top end of the housing 220. A first mounting groove 2112 is formed inside the first connecting post 2111. A second connecting plate 216 is provided inside the first mounting groove 2112, and the outer circumferential wall of the second connecting plate 216 and the inner circumferential wall of the first mounting groove 2112 are in clearance fit. Because the outer circumferential wall of the second connecting plate 216 and the inner circumferential wall of the first mounting groove 2112 are in clearance fit, the movement of the second connecting plate 216 can be limited and guided. A second connecting post 212 is installed on the lower surface of the second connecting plate 216. The other end of the second connecting post 212 extends to the outside through the first through hole 2113 and is connected to the T-shaped connecting block 214 through the first connecting plate 213. The first through hole 2113 is opened at the center of the bottom end of the first connecting post 211. The outer wall of the second connecting post 212 and the hole wall of the first through hole 2113 are in clearance fit. Because the outer wall of the second connecting post 212 and the hole wall of the first through hole 2113 are in clearance fit, the movement of the second connecting post 212 can be limited and guided.

[0057] A first limiting block 2161 arranged in a ring array is installed on the circumferential outer wall of the second connecting plate 216. The first limiting block 2161 is installed in the first limiting groove 2111. The outer wall of the first limiting block 2161 and the groove wall of the first limiting groove 2111 are in clearance fit. The first limiting groove 2111 is arranged in a ring array on the circumferential inner wall of the first mounting groove 2112. Because the outer wall of the first limiting block 2161 and the groove wall of the first limiting groove 2111 are in clearance fit, the movement of the second connecting plate 216 can be further limited and guided. A first spring 215 is provided between the upper surface of the second connecting plate 216 and the top end of the first mounting groove 2112. A second spring 217 is provided between the lower surface of the second connecting plate 216 and the bottom end of the first mounting groove 2112. The second spring 217 is sleeved on the outer side of the outer wall of the second connecting post 212.

[0058] T-shaped connecting block 214 is installed in T-shaped connecting groove 241, and the outer wall of T-shaped connecting block 214 and the groove wall of T-shaped connecting groove 241 are in clearance fit. Because the outer wall of T-shaped connecting block 214 and the groove wall of T-shaped connecting groove 241 are in clearance fit, the outer wall of screening plate 240 and the inner wall of housing 220 are in clearance fit. A safety door is provided on the rear end wall of housing 220, so that the operator can disassemble and replace screening plate 240.

[0059] Working principle: When in use, after connecting to an external power source, the operator starts the device to screen silicon carbide particles. The starting of the reduction motor 231 on the vibration assembly 230 drives the cam 233 on the first rotating shaft 232 to rotate. The rotation of the cam 233 causes reciprocating pressure on the screening plate 240 in the Y-axis direction. Under this reciprocating pressure, the screening plate 240 vibrates up and down in the Y-axis direction in cooperation with the vibration assembly 230 and the rebound assembly 210. The silicon carbide particles are sieved. Silicon carbide particles larger than the inner diameter of the sieve hole 242 will clog the sieve hole 242. When the stepper motor 251 on the anti-clogging component 250 starts, it drives the second rotating shaft 252 to rotate forward or backward. Because the external thread on the outer wall of the second rotating shaft 252 and the threaded hole 2532 on the moving plate 253 are threadedly engaged, the forward or reverse rotation of the second rotating shaft 252 causes the moving plate 253 to move along the outer wall of the second rotating shaft 252. The movement of the moving plate 253 along the outer wall of the second rotating shaft 252 indirectly drives the elastic... The top block 255 is displaced. With the coordination of the displacement of the elastic top block 255 and the up-and-down vibration of the screening plate 240, the elastic top block 255 can push out the silicon carbide particles blocked in the screening holes 242. In the process of screening silicon carbide particles, the screening plate 240 on the first screening mechanism 200 screens silicon carbide particles larger than the standard size. Silicon carbide particles larger than the standard size are discharged to the outside from the discharge chute 222 on the first screening mechanism 200. Silicon carbide particles of standard size and smaller than the standard size will be discharged from the first... The material is discharged from the outlet 223 on the screening mechanism 200 and enters the housing 220 of the second screening mechanism 300 through the inlet 221. The screening plate 240 on the second screening mechanism 300 screens silicon carbide particles of standard size and those smaller than standard size. Silicon carbide particles of standard size are discharged to the outside from the outlet 222 on the second screening mechanism 300, and silicon carbide particles smaller than standard size are discharged to the outside from the outlet 223 on the second screening mechanism 300, thereby achieving the screening of silicon carbide particles.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A screening device for a silicon carbide granulator, characterized in that, It includes a first screening mechanism (200) for screening particles larger than the standard silicon carbide particle size and a second screening mechanism (300) for screening particles smaller than the standard silicon carbide particle size. Both the first screening mechanism (200) and the second screening mechanism (300) are provided with a housing (220). Inside the housing (220) is a screening plate (240) for screening silicon carbide particles and an anti-clogging component (250) for cleaning the screening plate (240). The screening plate (240) is located above the anti-clogging component (250). A vibration component (230) for driving the screening plate (240) to vibrate up and down in the Y-axis direction is provided in the middle area between the upper surface of the screening plate (240) and the top inside the housing (220). A springback component (210) for the screening plate (240) to spring back in the Y-axis direction is provided at each of the four corners between the upper surface of the screening plate (240) and the top inside the housing (220).

2. The silicon carbide granulator screening device according to claim 1, characterized in that: The first screening mechanism (200) and the second screening mechanism (300) are both installed on the top of the mounting frame (100), and the first screening mechanism (200) is located above the second screening mechanism (300). The top side of the housing (220) is provided with a feed inlet (221), and the bottom side of the housing (220) is provided with a discharge outlet (223). A discharge groove (222) is provided on one side of the outer wall of the housing (220), and a safety door is provided on the rear end wall of the housing (220). The discharge outlet (223) on the first screening mechanism (200) is located on the top of the second screening mechanism (300), and the discharge outlet (223) on the first screening mechanism (200) is connected to the discharge outlet (223) on the second screening mechanism (300).

3. The silicon carbide granulator screening device according to claim 1, characterized in that: The outer wall of the sieve plate (240) and the inner wall of the shell (220) are fitted with a clearance. The surface of the sieve plate (240) is provided with sieve holes (242) arranged in a rectangular array, and T-shaped connecting grooves (241) are provided on both sides of the upper surface of the sieve plate (240).

4. The silicon carbide granulator screening device according to claim 1, characterized in that: The vibration assembly (230) is composed of a geared motor (231), a first rotating shaft (232) and a cam (233). There are two cams (233), which are installed on the front and rear ends of the outer wall of the first rotating shaft (232) and are respectively located on the front and rear ends of the screen plate (240). One end of the first rotating shaft (232) extends through the bearing on the front wall of the housing (220) to the outside and is connected to the geared motor (231) through a coupling. The geared motor (231) is installed on the support block on the front wall of the housing (220).

5. The screening device for a silicon carbide granulator according to claim 1, characterized in that: The anti-blocking component (250) is provided with a movable plate (253), and the movable plate (253) is located inside the housing (220). A threaded hole (2532) is opened at the center of the outer wall of the movable plate (253). A second rotating shaft (252) is installed in the threaded hole (2532). One end of the second rotating shaft (252) is installed in a bearing on one side of the outer wall of the housing (220). The other end of the second rotating shaft (252) extends through the bearing on the other side of the outer wall of the housing (220) to the outside and is connected to a stepper motor (251) through a coupling. The stepper motor (251) is installed on a support block on the other side of the outer wall of the housing (220). The outer wall of the second rotating shaft (252) is provided with an external thread, and the external thread on the outer wall of the second rotating shaft (252) is threadedly engaged with the threaded hole (2532) on the moving plate (253). The front end and the rear end of the outer wall of the moving plate (253) are provided with a second through hole (2533). A guide rod (257) is installed in the second through hole (2533). The outer wall of the guide rod (257) is clearance-fitted with the hole wall of the second through hole (2533), and the two ends of the guide rod (257) are respectively installed on the inner walls of the two sides inside the housing (220). Touch rods (2531) are installed on both outer walls of the movable plate (253), and limit switches are installed on both inner walls of the housing (220).

6. The silicon carbide granulator screening device according to claim 5, characterized in that: The upper surface of the movable plate (253) is connected to the mounting plate (254) via a compression structure (256), and the upper surface of the mounting plate (254) is equipped with elastic top blocks (255) arranged in a rectangular array. A fourth connecting post (2563) is provided on the compression structure (256). The bottom end of the fourth connecting post (2563) is installed on the upper surface of the movable plate (253), and a second mounting groove (2567) is provided at the center of the top end of the fourth connecting post (2563). 7) A third connecting plate (2562) is provided inside, and the outer circumferential wall of the third connecting plate (2562) and the inner circumferential wall of the second mounting groove (2567) are in clearance fit. A third spring (2565) is provided between the lower surface of the third connecting plate (2562) and the bottom end of the second mounting groove (2567). A third connecting post (2561) is installed on the upper surface of the third connecting plate (2562), and the other end of the third connecting post (2561) is installed on the lower surface of the mounting plate (254). The third connecting plate (2562) has a second limiting block (2564) arranged in a ring array on its outer circumferential wall. The other end of the second limiting block (2564) is installed in the second limiting groove (2566). The outer wall of the second limiting block (2564) and the groove wall of the second limiting groove (2566) are in clearance fit. The second limiting groove (2566) is arranged in a ring array on the inner circumferential wall of the second mounting groove (2567).

7. The silicon carbide granulator screening device according to claim 1, characterized in that: The rebound assembly (210) is provided with a first connecting post (211). The top end of the first connecting post (211) is installed inside the top end of the housing (220). The first connecting post (211) has a first mounting groove (2112) inside. The first mounting groove (2112) is provided with a second connecting plate (216). The outer circumferential wall of the second connecting plate (216) and the inner circumferential wall of the first mounting groove (2112) are in clearance fit. The lower surface of the second connecting plate (216) is provided with a second connecting post (212). The other end of the second connecting post (212) extends to the outside through the first through hole (2113) and is connected to the T-shaped connecting block (214) through the first connecting plate (213). The first through hole (2113) is opened at the center of the bottom end of the first connecting post (211). The outer wall of the second connecting post (212) and the hole wall of the first through hole (2113) are in clearance fit. The second connecting plate (216) has a first limiting block (2161) arranged in a ring array on its outer circumferential wall. The first limiting block (2161) is installed in the first limiting groove (2111). The outer wall of the first limiting block (2161) and the groove wall of the first limiting groove (2111) are in clearance fit. The first limiting groove (2111) is arranged in a ring array on the inner circumferential wall of the first mounting groove (2112). A first spring (215) is provided between the upper surface of the second connecting plate (216) and the top end of the first mounting groove (2112). A second spring (217) is provided between the lower surface of the second connecting plate (216) and the bottom end of the first mounting groove (2112). The second spring (217) is sleeved on the outer side of the outer wall of the second connecting post (212).

8. The silicon carbide granulator screening device according to claim 7, characterized in that: The T-shaped connecting block (214) is installed in the T-shaped connecting groove (241), and the outer wall of the T-shaped connecting block (214) and the groove wall of the T-shaped connecting groove (241) are in clearance fit.

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