A multi-deck spin screen
By using the connection structure and vibration system of the multi-layer rotary vibrating screen, the problem of the inflexible adjustment of the number of screening screen plates is solved, thereby improving the screening effect and simplifying the operation, and increasing the efficiency and flexibility of abrasive production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNCHUN ZHENGXINGABRASIVE CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-14
AI Technical Summary
Existing screening devices cannot flexibly adjust the number of screening screens in abrasive production, resulting in inconvenience in disassembly and installation. They are also difficult to adapt to differences in particle size distribution of different batches of abrasives and changes in production processes, thus limiting their flexibility and efficiency.
The multi-layer rotary vibrating screen adopts a connection structure, including first and second connecting parts. The screen frame can be quickly disassembled and installed through snap-fit ring grooves and limit bolts. Combined with the power provided by the vibrating motor and springs, it achieves stability and flexibility in the screening process.
It enables flexible adjustment of the number of screening screens, improves screening effect and device stability, simplifies operation steps, and improves screening and processing efficiency of abrasives.
Smart Images
Figure CN224486706U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of abrasive production and processing technology, specifically, it relates to a multi-layer rotary vibrating screen. Background Technology
[0002] In industries such as abrasive production and processing, non-metallic mineral production and processing, and graphite and carbon product manufacturing, material screening is an important production process, and the screening effect directly affects product quality and production efficiency.
[0003] Utility model CN219273714U, belonging to the technical field of sandblasting equipment, discloses a sand screening and distribution device and a sandblasting machine. The sand screening and distribution device includes a base, a vibrating section, a screen section, and a receiving tray. The vibrating section is elastically connected to the base. The screen section is mounted on the vibrating section and includes multiple screens spaced apart from top to bottom, with the mesh size decreasing sequentially from top to bottom. The vibrating section drives the screen section to vibrate, and the sand to be screened passes through the multiple screens sequentially from top to bottom. The receiving tray is located below the bottommost screen section and is used to receive the sand that has passed through it. The receiving tray is inclined, and a vibrator is installed on its bottom side, driving the receiving tray to vibrate. This sand screening and distribution device improves the sand distribution efficiency and effectively prevents the accumulation of sand at the bottom layer, allowing the sand to be quickly discharged outside the device.
[0004] However, the aforementioned patent still has the following problems: When performing vibratory screening of abrasives, the existing screening device has a significant defect that the number of screening screens cannot be flexibly adjusted as needed. This is especially evident in the extremely inconvenient disassembly and installation process. Since the particle size distribution of different batches of abrasives may vary, or the production process may change the requirements for abrasive particle size, it is necessary to adjust the screening layers to meet different screening needs. However, the number of screens in this device is fixed, making it difficult to adapt to such changes and limiting its flexibility of use. The connection effect between multiple screening devices also needs to be strengthened.
[0005] In view of this, this utility model is hereby proposed. Utility Model Content
[0006] To solve the technical problem of inconvenient disassembly and installation of the aforementioned device, the basic concept of the technical solution adopted by this utility model is as follows:
[0007] A multi-layer vibrating screen, comprising:
[0008] The bottom cylinder is cylindrical and is placed on the ground.
[0009] The connecting structure includes a first connecting part and a second connecting part. The first connecting part includes a screen frame disposed at the top of the bottom cylinder, a second fixing ring plate fixedly installed at the bottom of the screen frame, a second snap-fit ring plate fixedly installed at the bottom of the second fixing ring plate, a first fixing bottom plate disposed at the top of the bottom cylinder, a first snap-fit ring groove opened at the top of the first fixing bottom plate, and a second snap-fit ring plate snap-fitted into the interior of the first snap-fit ring groove. The second connecting part includes a first fixing ring plate fixedly installed at the top of the screen frame, a second snap-fit ring groove opened at the top of the first fixing ring plate, and a second snap-fit ring plate snap-fitted into the interior of the second snap-fit ring groove.
[0010] In a preferred embodiment of this utility model, the second connecting part further includes two sets of first limiting plates fixedly installed on the outer wall of the first fixed base plate. The first limiting plate has a first threaded groove inside. Two sets of second limiting plates are fixedly installed on the outer walls of the second fixing ring plate and the first fixing ring plate. The second limiting plate has a fourth threaded groove inside. A limiting bolt is spirally installed inside the fourth threaded groove. The limiting bolt is spirally installed inside the first threaded groove. A hexagonal nut is spirally installed on the outer wall of the limiting bolt.
[0011] In a preferred embodiment of the present invention, a first fixed circular plate is fixedly installed inside the first fixed base plate, a vibration motor is fixedly installed at the bottom of the first fixed circular plate, and eight sets of vibration springs are fixedly installed between the first fixed base plate and the base cylinder.
[0012] In a preferred embodiment of the present invention, the outer wall of the screen frame is provided with holes, and a discharge pipe is fixedly installed in the holes, with a discharge port fixedly installed at one end of the discharge pipe.
[0013] In a preferred embodiment of this utility model, the first fixing ring plate has two sets of second threaded grooves inside, the second snap-fit ring groove is provided with a first limiting ring plate inside, the outer wall of the first limiting ring plate is fixedly installed with two sets of first connecting blocks, the outer wall of the first connecting blocks is fixedly installed with a first fixing sleeve, the first fixing sleeve has a third threaded groove inside, the second threaded groove and the third threaded groove are provided with screws, the first limiting ring plate is fixedly installed with a first screen plate inside, and the first fixing sleeve is snap-fitted into the second threaded groove.
[0014] In a preferred embodiment of this utility model, a third snap-fit ring groove is provided on the inner bottom of the screen frame, a third limiting plate is fixedly installed inside the third snap-fit ring groove, a sixth threaded groove is provided inside the third limiting plate, a first snap-fit ring plate is snap-fitted inside the third snap-fit ring groove, two sets of fourth limiting plates are fixedly installed on the outer wall of the first snap-fit ring plate, a fifth threaded groove is provided inside the fourth limiting plate, and screws are provided inside the fifth threaded groove and the sixth threaded groove.
[0015] In a preferred embodiment of this utility model, a second fixed circular plate is fixedly installed inside the first set of snap-fit ring plates, the bottom of the second fixed circular plate is in close contact with the top of the first fixed circular plate, a second screen plate is fixedly installed inside the remaining sets of first snap-fit ring plates, a third fixed circular plate is provided at the top of the bottom cylinder, a feed hopper is fixedly installed at the top of the third fixed circular plate, and two sets of second limiting plates are fixedly installed on the outer wall of the third fixed circular plate.
[0016] Compared with the prior art, the present invention has the following advantages:
[0017] 1. To achieve quick disassembly and installation of the device, adjust the number of screening structures as needed, improve the flexibility of the device, increase the number of screening screens, improve the screening effect of abrasives, and improve the stability of the device installation.
[0018] 2. To achieve the purpose of vibrating the discharge of materials, quickly screen the abrasive, improve the processing efficiency of the device, and simplify the operation steps of the device.
[0019] 3. To achieve the purpose of multiple screening and filtration of materials, improve the screening efficiency of abrasives, and disassemble and install the screen plate as needed to optimize the user experience of the device.
[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description
[0021] In the attached diagram:
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the first snap-fit ring groove structure of this utility model;
[0024] Figure 3 This is a schematic diagram showing the disassembled second snap-fit ring groove and the first limiting ring plate of this utility model;
[0025] Figure 4 This is a split schematic diagram of the third snap ring groove and the first snap ring plate of this utility model;
[0026] Figure 5 This is a schematic diagram of the second snap ring plate structure of this utility model;
[0027] Figure 6 This is a schematic diagram of the structure of the second fixed circular plate and the second screening mesh plate of this utility model.
[0028] In the diagram: 10. Bottom cylinder; 11. Vibration spring; 12. First fixed base plate; 13. First fixed circular plate; 14. Vibration motor; 15. First snap-fit ring groove; 16. First limiting plate; 17. First threaded groove; 18. Screen frame; 19. Discharge pipe; 20. Discharge port; 21. First fixed ring plate; 22. Second snap-fit ring groove; 23. Second threaded groove; 24. First limiting ring plate; 25. First screen mesh plate; 26. First connecting block; 27. First fixed... 28. Sleeve; 29. Third threaded groove; 30. Second limiting plate; 31. Fourth threaded groove; 32. Third retaining ring groove; 33. First retaining ring plate; 34. Fourth limiting plate; 35. Fifth threaded groove; 36. Sixth threaded groove; 37. Second fixing ring plate; 38. Second retaining ring plate; 39. Second fixing circular plate; 40. Second screen plate; 41. Limiting bolt; 42. Hexagonal nut; 43. Third fixing circular plate; 44. Feed hopper. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.
[0030] Example 1: A multi-layer rotary vibrating screen, specifically as follows Figure 1 , Figure 2 and Figure 5 As shown, the device includes a bottom cylinder 10, which is cylindrical and placed on the ground. The connection structure includes a first connecting part and a second connecting part. The first connecting part includes a screen frame 18 disposed at the top of the bottom cylinder 10. A second fixing ring plate 37 is fixedly installed at the bottom of the screen frame 18, and a second snap-fit ring plate 38 is fixedly installed at the bottom of the second fixing ring plate 37. A first fixing base plate 12 is disposed at the top of the bottom cylinder 10, and a first snap-fit ring groove 15 is formed at the top of the first fixing base plate 12. The second snap-fit ring plate 38 is snap-fitted into the interior of the first snap-fit ring groove 15. The second connecting part includes a first fixing ring plate 21 fixedly installed at the top of the screen frame 18, and a second snap-fit ring groove 22 is formed at the top of the first fixing ring plate 21. The second snap-fit ring plate 38 is snap-fitted into the interior of the second snap-fit ring groove 22. The device is connected and fixed by a connecting structure. A set of second snap-fit ring plates 38 are snapped into the inside of the first snap-fit ring groove 15, and other sets of second snap-fit ring plates 38 are snapped into the inside of the second snap-fit ring groove 22. The number of screen frames 18 is selected as needed and they are stacked.
[0031] Specifically, such as Figure 1 , Figure 2 and Figure 5As shown, the second connecting part also includes two sets of first limiting plates 16 fixedly installed on the outer wall of the first fixed base plate 12. The first limiting plate 16 has a first threaded groove 17 inside. Two sets of second limiting plates 29 are fixedly installed on the outer walls of both the second fixed ring plate 37 and the first fixed ring plate 21. The second limiting plate 29 has a fourth threaded groove 30 inside. A limiting bolt 41 is screwed into the fourth threaded groove 30. The limiting bolt 41 is screwed into the first threaded groove 17, and a hexagonal nut 42 is screwed onto the outer wall of the limiting bolt 41. By screwing the limiting bolt 41 into the fourth threaded groove 30 and the first threaded groove 17, and screwing the hexagonal nut 42 onto the outer wall of the limiting bolt 41, multiple sets of screen frames 18 and the first fixed base plate 12 are connected.
[0032] Based on the above, the structure of the bottom cylinder 10, the first fixed bottom plate 12, the first snap-fit ring groove 15, the first limiting plate 16, the first threaded groove 17, the screen frame 18, the second snap-fit ring groove 22, the second limiting plate 29, the fourth threaded groove 30, the second fixed ring plate 37, the second snap-fit ring plate 38, the limiting bolt 41, and the hexagonal nut 42 achieves the purpose of quick disassembly and installation of the device. The number of screening structures can be adjusted as needed to improve the flexibility of the device, increase the number of screening screens, improve the screening effect of abrasive, and improve the stability of the device installation.
[0033] Example 2: Based on Example 1, specifically as follows... Figure 1 and Figure 2 As shown, a first fixed circular plate 13 is fixedly installed inside the first fixed base plate 12, and a vibration motor 14 is fixedly installed at the bottom of the first fixed circular plate 13. Eight sets of vibration springs 11 are fixedly installed between the first fixed base plate 12 and the bottom cylinder 10. When the vibration motor 14 is started, it drives the first fixed base plate 12 and the first fixed circular plate 13 to vibrate, and the vibration is damped and supported by the first snap-fit ring groove 15.
[0034] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the outer wall of the screen frame 18 has holes, and a discharge pipe 19 is fixedly installed inside the holes. A discharge port 20 is fixedly installed at one end of the discharge pipe 19. The material is output through the discharge pipe 19 and the discharge port 20.
[0035] Based on the above, the structure of the bottom cylinder 10, vibration spring 11, first fixed bottom plate 12, first fixed circular plate 13, vibration motor 14, screen frame 18, discharge pipe 19 and discharge port 20 achieves the purpose of vibrating the device to discharge materials, quickly screening the abrasive, improving the processing efficiency of the device, and simplifying the operation steps of the device.
[0036] Example 3: Based on Examples 1 and 2, specifically as follows... Figure 1 and Figure 3 As shown, the first fixing ring plate 21 has two sets of second threaded grooves 23 inside. The second snap-fit ring groove 22 has a first limiting ring plate 24 inside. Two sets of first connecting blocks 26 are fixedly installed on the outer wall of the first limiting ring plate 24. A first fixing sleeve 27 is fixedly installed on the outer wall of the first connecting block 26. The first fixing sleeve 27 has a third threaded groove 28 inside. Screws are installed inside the second threaded grooves 23 and 28. A first screening mesh plate 25 is fixedly installed inside the first limiting ring plate 24. The first fixing sleeve 27 is snap-fitted into the second threaded groove 23. By snapping the first fixing sleeve 27 into the second threaded groove 23 and fixing the first limiting ring plate 24 inside the first fixing ring plate 21 with screws, the abrasive is filtered and screened once by the first screening mesh plate 25.
[0037] Specifically, such as Figure 1 and Figure 4 As shown, a third snap-fit ring groove 31 is provided on the inner bottom of the screen frame 18. A third limiting plate 32 is fixedly installed inside the third snap-fit ring groove 31. A sixth threaded groove 36 is provided inside the third limiting plate 32. A first snap-fit ring plate 33 is snap-fitted inside the third snap-fit ring groove 31. Two sets of fourth limiting plates 34 are fixedly installed on the outer wall of the first snap-fit ring plate 33. A fifth threaded groove 35 is provided inside the fourth limiting plate 34. Screws are provided inside the fifth threaded groove 35 and the sixth threaded groove 36. The fourth limiting plate 34 is snap-fitted into the inside of the third snap-fit ring groove 31, and the first snap-fit ring plate 33 is installed inside the third snap-fit ring groove 31 by screws.
[0038] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, a second fixed circular plate 39 is fixedly installed inside a set of first locking ring plates 33. The bottom of the second fixed circular plate 39 is in close contact with the top of the first fixed circular plate 13. A second screen plate 40 is fixedly installed inside the remaining sets of first locking ring plates 33. A third fixed circular plate 43 is provided on the top of the bottom cylinder 10. A feed hopper 44 is fixedly installed on the top of the third fixed circular plate 43. Two sets of second limiting plates 29 are fixedly installed on the outer wall of the third fixed circular plate 43. The abrasive is screened a second time through the second screen plate 40. The holes of the first screen plate 25 and the second screen plate 40 inside the multiple sets of screen frames 18 decrease in size from top to bottom. The bottom of the second fixed circular plate 39 is in close contact with the top of the first fixed circular plate 13. The finally screened abrasive is collected inside a set of screen frames 18 that is close to the top of the first fixed bottom plate 12. The feed hopper 44 is fixed by the third fixed circular plate 43, and the abrasive is added into the device through the feed hopper 44.
[0039] In summary, through the structure of the first fixed ring plate 21, the second snap-fit ring groove 22, the second threaded groove 23, the first limiting ring plate 24, the first screening screen plate 25, the first connecting block 26, the first fixed sleeve 27, the third threaded groove 28, the third snap-fit ring groove 31, the third limiting plate 32, the first snap-fit ring plate 33, the fourth limiting plate 34, the fifth threaded groove 35, the sixth threaded groove 36, the second fixed circular plate 39, the second screening screen plate 40, the third fixed circular plate 43, and the feed hopper 44, the purpose of multiple screening and filtration of materials is achieved, improving the screening efficiency of abrasives. The screening screen plate can be disassembled and installed as needed to optimize the user experience of the device.
[0040] Working Principle: This multi-layer vibrating screen achieves the connection and fixation of its components through a connecting structure. The connecting structure includes a first connecting part and a second connecting part. In the first connecting part, the screen frame 18 is placed on top of the bottom cylinder 10, and the second locking ring plate 38 below the second fixing ring plate 37 at the bottom of the screen frame 18 is locked into the first locking ring groove 15 at the top of the first fixing base plate 12 at the top of the bottom cylinder 10. In the second connecting part, the top of the first fixing ring plate 21 at the top of the screen frame 18 has a second locking ring groove 22, and the second locking ring plate 38 is also locked into this groove. In this way, the number of screen frames 18 can be selected for stacking according to actual needs. To further stabilize the connection, the second connecting part is also equipped with a bolt fastening structure. Two sets of first limiting plates 16 are fixedly installed on the outer wall of the first fixing base plate 12, and the first threaded groove 17 is opened inside them; two sets of second limiting plates 29 are fixedly installed on the outer walls of the second fixing ring plate 37 and the first fixing ring plate 21, and the fourth threaded groove 30 is opened inside them. The limiting bolt 41 is screwed into the fourth threaded groove 30 and the first threaded groove 17, and the hexagonal nut 42 is screwed onto the outer wall of the limiting bolt 41, thereby achieving a tight connection between multiple sets of screen frames 18 and the first fixed base plate 12. The first fixed base plate 12 has a first fixed circular plate 13 fixedly installed inside, and a vibration motor 14 is fixedly installed at the bottom of the first fixed circular plate 13. Eight sets of vibration springs 11 are fixedly installed between the first fixed base plate 12 and the bottom cylinder 10. The vibration motor 14 is started, which drives the first fixed base plate 12 and the first fixed circular plate 13 to vibrate. The vibration spring 11 plays a role in shock absorption and support, providing power for the entire screening process. The top of the bottom cylinder 10 is provided with a third fixed circular plate 43, and the top of the bottom cylinder 10 is fixedly installed with a feed hopper 44. The feed hopper 44 is fixed by the third fixed circular plate 43. The abrasive is added into the device from the feed hopper 44. Holes are opened on the outer wall of the screen frame 18. The discharge pipe 19 is fixedly installed in the holes. The discharge port 20 is fixedly installed at one end of the discharge pipe 19. The screened material is output through the discharge pipe 19 and the discharge port 20. The first fixed ring plate 21 has two sets of second threaded grooves 23 inside. The second snap-fit ring groove 22 is provided with a first limiting ring plate 24. The outer wall of the first limiting ring plate 24 is fixedly installed with two sets of first connecting blocks 26. The outer wall of the first connecting blocks 26 is fixedly installed with a first fixed sleeve 27. The first fixed sleeve 27 has a third threaded groove 28 inside. The first fixing sleeve 27 is inserted into the second threaded groove 23, and the first limiting ring plate 24 is fixed inside the first fixing ring plate 21 by screws. The first screening screen plate 25 inside the first limiting ring plate 24 is used to perform initial filtration and screening of the abrasive. The bottom inner side of the screen frame 18 has a third snap-fit ring groove 31, and the third limiting plate 32 is fixedly installed inside it. The third limiting plate 32 has a sixth threaded groove 36 inside it.The first snap-fit ring plate 33 is snapped into the third snap-fit ring groove 31. Two sets of fourth limiting plates 34 are fixedly installed on the outer wall of the first snap-fit ring plate 33. The fourth limiting plates 34 have a fifth threaded groove 35 inside. The fourth limiting plates 34 are snapped into the third snap-fit ring groove 31, and the first snap-fit ring plate 33 is installed in the third snap-fit ring groove 31 with screws. A second fixing circular plate 39 is fixedly installed inside one set of first snap-fit ring plates 33, and its bottom is in close contact with the top of the first fixing circular plate 13. The second screening mesh plate 40 is fixedly installed inside the other sets of first snap-fit ring plates 33. The holes of the first screening mesh plate 25 and the second screening mesh plate 40 inside the multiple sets of screen frames 18 decrease in size from top to bottom, and the abrasive is screened twice and multiple times. The abrasive is finally collected inside the set of screen frames 18 that is close to the top of the first fixed base plate 12.
[0041] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A multi-layer rotary vibrating screen, characterized in that, include: Bottom tube (10), the bottom tube (10) is cylindrical and is placed on the ground; The connection structure includes a first connection part and a second connection part. The first connection part includes a screen frame (18) disposed on the top of the bottom cylinder (10). A second fixing ring plate (37) is fixedly installed at the bottom of the screen frame (18). A second snap-fit ring plate (38) is fixedly installed at the bottom of the second fixing ring plate (37). A first fixing bottom plate (12) is disposed on the top of the bottom cylinder (10). A first snap-fit ring groove (15) is opened on the top of the first fixing bottom plate (12). The second snap-fit ring plate (38) is snap-fitted and installed inside the first snap-fit ring groove (15). The second connection part includes a first fixing ring plate (21) fixedly installed on the top of the screen frame (18). A second snap-fit ring groove (22) is opened on the top of the first fixing ring plate (21). The second snap-fit ring plate (38) is snap-fitted and installed inside the second snap-fit ring groove (22).
2. The multi-layer vibrating screen according to claim 1, characterized in that, The second connecting part also includes two sets of first limiting plates (16) fixedly installed on the outer wall of the first fixed base plate (12). The first limiting plate (16) has a first threaded groove (17) inside. Two sets of second limiting plates (29) are fixedly installed on the outer walls of the second fixed ring plate (37) and the first fixed ring plate (21). The second limiting plate (29) has a fourth threaded groove (30) inside. The fourth threaded groove (30) is screwed with a limiting bolt (41) inside. The limiting bolt (41) is screwed inside the first threaded groove (17). A hexagonal nut (42) is screwed on the outer wall of the limiting bolt (41).
3. The multi-layer vibrating screen according to claim 1, characterized in that, The first fixed base plate (12) has a first fixed circular plate (13) fixedly installed inside, and a vibration motor (14) is fixedly installed at the bottom of the first fixed circular plate (13). Eight sets of vibration springs (11) are fixedly installed between the first fixed base plate (12) and the bottom cylinder (10).
4. The multi-layer vibrating screen according to claim 1, characterized in that, The outer wall of the screen frame (18) is provided with holes, and a discharge pipe (19) is fixedly installed in the holes. A discharge port (20) is fixedly installed at one end of the discharge pipe (19).
5. The multi-layer vibrating screen according to claim 1, characterized in that, The first fixed ring plate (21) has two sets of second threaded grooves (23) inside. The second snap-fit ring groove (22) is provided with a first limiting ring plate (24). Two sets of first connecting blocks (26) are fixedly installed on the outer wall of the first limiting ring plate (24). A first fixed sleeve (27) is fixedly installed on the outer wall of the first connecting block (26). The first fixed sleeve (27) has a third threaded groove (28) inside. Screws are provided inside the second threaded groove (23) and the third threaded groove (28). A first screen plate (25) is fixedly installed inside the first limiting ring plate (24). The first fixed sleeve (27) is snap-fitted into the inside of the second threaded groove (23).
6. The multi-layer vibrating screen according to claim 1, characterized in that, The inner bottom of the screen frame (18) is provided with a third snap-fit ring groove (31), a third limiting plate (32) is fixedly installed inside the third snap-fit ring groove (31), a sixth threaded groove (36) is provided inside the third limiting plate (32), a first snap-fit ring plate (33) is snap-fit installed inside the third snap-fit ring groove (31), two sets of fourth limiting plates (34) are fixedly installed on the outer wall of the first snap-fit ring plate (33), a fifth threaded groove (35) is provided inside the fourth limiting plate (34), and screws are provided inside the fifth threaded groove (35) and the sixth threaded groove (36).
7. The multi-layer vibrating screen according to claim 6, characterized in that, A second fixed circular plate (39) is fixedly installed inside the first set of snap ring plates (33). The bottom of the second fixed circular plate (39) is in close contact with the top of the first fixed circular plate (13). A second screen plate (40) is fixedly installed inside the other sets of first snap ring plates (33). A third fixed circular plate (43) is provided on the top of the bottom cylinder (10). A feed hopper (44) is fixedly installed on the top of the third fixed circular plate (43). Two sets of second limiting plates (29) are fixedly installed on the outer wall of the third fixed circular plate (43).