Pretreatment equipment for recycling neodymium iron boron waste

Abstract

The invention discloses pretreatment equipment for neodymium iron boron waste recycling, and belongs to the technical field of neodymium iron boron waste recycling devices.The pretreatment equipment comprises a crusher and a filter screen arranged below the crusher, a connecting plate is slidably arranged between an outlet below the crusher and the filter screen, and a transverse plate is fixedly arranged on the side, away from the crusher, of the connecting plate; a plurality of groups of pushing plates for pushing waste materials at the top of the filter screen are hinged to the bottom of the connecting plate, and the pushing plates are elastically matched with the connecting plate; through the arrangement of the material pushing plate, on one hand, neodymium-iron-boron waste remaining on the filter screen can be cleaned, and on the other hand, when the neodymium-iron-boron waste with the large size cannot pass through the filter screen and is clamped, the material pushing plate can rapidly rebound and crush the clamped neodymium-iron-boron waste after deflecting upwards by a certain distance, and the neodymium-iron-boron waste can be recycled. Therefore, the filter screen can be protected to the maximum extent, and meanwhile, the whole material pushing process is more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of neodymium iron boron waste recycling devices, and particularly relates to a pretreatment device for the recycling and reuse of neodymium iron boron waste. Background Art

[0002] The recycling of waste neodymium iron boron mainly involves multiple steps such as roasting, acid dissolution, filtration, and extraction. However, in order to ensure the treatment effect of the recycling process, waste neodymium iron boron is usually subjected to crushing and separation treatment before the treatment process.

[0003] Chinese invention patent CN115365265A discloses a recycling device for waste neodymium iron boron magnetic materials and its usage method. The waste neodymium iron boron is put into a crushing box through a feeding hopper, a crushing motor drives a driving gear to rotate, the driving gear drives two driven gears to rotate, and the two driven gears drive two crushing rollers to rotate to crush the waste neodymium iron boron falling into the crushing box. Then, the crushed waste is screened through a filter screen.

[0004] The above device filters and screens the crushed waste through a filter screen, and processes the waste remaining above the filter screen through a pushing plate. However, in actual use, due to the hard texture of neodymium iron boron waste, when it gets stuck on the filter screen, the pushing plate is extremely likely to damage the filter screen during the pushing process. To sum up, there is still room for improvement in the above device.

[0005] Therefore, it is necessary to provide a pretreatment device for the recycling and reuse of neodymium iron boron waste to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a pretreatment device for the recycling and reuse of neodymium iron boron waste to solve the problem that the existing device filters and screens the crushed waste through a filter screen, and processes the waste remaining above the filter screen through a pushing plate. However, in actual use, due to the hard texture of neodymium iron boron waste, when it gets stuck on the filter screen, the pushing plate is extremely likely to damage the filter screen during the pushing process.

[0007] Based on the above idea, the present invention provides the following technical solution: A pretreatment device for the recycling and reuse of neodymium iron boron waste, including a crusher and a filter screen arranged below the crusher. A connecting plate is slidably arranged between the lower outlet of the crusher and the filter screen. A cross plate is fixedly arranged on the side of the connecting plate away from the crusher. A plurality of pushing plates for pushing the waste on the top of the filter screen are hinged to the bottom of the connecting plate, and the pushing plates are elastically matched with the connecting plate; A winding component connected to the pushing plate is provided at the cross plate, and the winding component is connected to the pushing plate by a traction rope. The winding component is driven to rotate by a rotating shaft below the cross plate. When the pushing plate is squeezed by the waste on the filter screen and deflected upward, the winding component cooperating with the pushing plate can be driven to rotate by the rotating shaft, so that the pushing plate can continuously deflect upward against the elastic force between it and the connecting plate. When the rotating shaft is disengaged from the winding component, the deflected pushing plate can rebound and strike the neodymium iron boron waste stuck on the filter screen.

[0008] As a further solution of the present invention: the winding component includes a collar sleeved on the outer side of the rotating shaft, the traction rope is fixed between the pushing plate and the collar, a limiting rod is elastically connected to the circumferential wall of the collar, and a pressing block cooperating with the limiting rod is elastically connected to the outer circumferential wall of the rotating shaft. Two pressing rings are symmetrically arranged on the outer side of the collar. During the process of the two pressing rings approaching each other, the limiting rod will be squeezed and move towards the direction close to the rotating shaft, and a slope is arranged at one end of the pressing block close to the limiting rod.

[0009] As a further solution of the present invention: a protrusion is fixedly arranged on one side of the pushing plate close to the rotating shaft, a lifting unit is arranged at the top of the protrusion, a connecting shaft is arranged below the cross plate, and a connecting ear plate is integrally formed at the top end position of the pressing ring. Two external threads with opposite spiral directions are arranged at the position of the connecting shaft close to the connecting ear plate, so that the connecting shaft passes through the connecting ear plate and is threadedly connected with the connecting ear plate. When the pushing plate deflects upward, it can drive the lifting unit to move upward synchronously, thereby driving the connecting shaft to rotate.

[0010] As a further solution of the present invention: a convex platform is fixedly arranged on one side of the connecting plate close to the protrusion, and an arc-shaped limiting spring is connected between the convex platform and the pushing plate.

[0011] As a further solution of the present invention: the lifting unit includes a bracket arranged above the protrusion, a roller is rotatably installed at the bottom end of the bracket, the roller is attached to the top of the protrusion, the bracket passes through the convex platform and is slidably matched with it, and a rack is fixedly arranged at one end of the bracket passing through the convex platform. A driven gear meshing with the rack is sleeved on the outer side of the connecting shaft, and a stop portion is integrally formed on the bracket. When the bracket moves upward to the limit position, the stop portion can contact the bottom surface of the convex platform.

[0012] As a further solution of the present invention: a strip-shaped groove slidably matched with the pressing block is opened on the outer circumferential wall of the rotating shaft, and a telescopic rod is fixedly arranged between the inner end face of the strip-shaped groove and the pressing block.

[0013] As a further solution of the present invention: a first spring is arranged between the inner end face of the strip-shaped groove and the pressing block.

[0014] As a further solution of the present invention: a baffle is fixedly arranged on the side of the connecting plate away from the rotating shaft, and the baffle extends downward to one side of the pushing plate, so that the pushing plate can maintain a vertical state initially.

[0015] As a further solution of the present invention: the pressing ring is of a semi-circular structure, and when the two pressing rings are mutually attached, they can enclose a complete circle.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: through the arranged pushing plate, on the one hand, the neodymium iron boron waste staying on the filter screen can be cleaned, and on the other hand, when a neodymium iron boron waste with a larger size cannot pass through the filter screen and is stuck, the pushing plate can quickly rebound and break the stuck neodymium iron boron waste after deflecting upward by a certain distance, so that the filter screen can be protected to the maximum extent, and at the same time, the whole pushing process becomes more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is the schematic diagram of the overall structure of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the present invention; Figure 3 is the schematic diagram of the filter screen installation structure of the present invention; Figure 4 is the distribution diagram of the pushing plate of the present invention; Figure 5 is the connection structure schematic diagram of the pushing plate and the connecting plate of the present invention; Figure 6 is the schematic diagram of the lifting unit structure of the present invention; Figure 7 is the cross-sectional view of the collar, the rotating shaft and the pressing ring of the present invention; Figure 8 is the present invention Figure 4 the enlarged structure schematic diagram at A; Figure 9 is the present invention Figure 7 the enlarged structure schematic diagram at B; Figure 10 is the schematic diagram of the pushing plate being extruded by the neodymium iron boron waste and deflecting upward of the present invention; Figure 11 is the schematic diagram of the block structure of the present invention.

[0019] In the figure: 1, frame; 2, cross plate; 201, slide bar; 3, crusher; 4, filter screen; 401, wing plate; 4011, slide plate; 4012, sliding sleeve; 5, driving gear; 6, connecting plate; 601, convex platform; 602, bushing; 603, baffle; 7, pushing plate; 701, protrusion; 8, rotating shaft; 9, driven gear; 10, limiting spring; 11, connecting shaft; 1101, clamping block; 12, guide rod; 13, pressing ring; 1301, connecting ear plate; 14, roller; 1401, bracket; 1402, stop portion; 15, collar; 16, towing rope; 17, rack; 18, telescopic rod; 19, pressing block; 1901, inclined surface; 20, limiting rod; 2001, convex block. Detailed implementation manners

[0020] As Figures 1 - 10 shown, a pretreatment device for the recycling and reuse of neodymium iron boron waste includes a frame 1 and a crusher 3 fixed on the top of the frame 1. During actual use, the crusher 3 can be a jaw crusher or the like. A conveyor belt (not shown in the figure) is installed at a position below the crusher 3. The conveyor belt can be distributed perpendicular to the crusher 3 so that the crushed neodymium iron boron waste can fall onto the conveyor belt. Of course, a filter screen 4 for filtering the crushed waste is arranged between the lower outlet of the crusher 3 and the conveyor belt. In this way, it can be ensured that the sizes of the neodymium iron boron waste falling onto the conveyor belt are roughly the same, which is beneficial to its recycling.

[0021] As the use time increases, some waste materials that are too large to pass through the filter screen 4 will accumulate on the top of the filter screen 4. In order to process this part of the waste materials, a pushing component is arranged on one side of the top of the filter screen 4 in this solution. Specifically, the pushing component includes a connecting plate 6 arranged between the outlet of the crusher 3 and the filter screen 4. A plurality of pushing plates 7 for cleaning the waste materials on the top of the filter screen 4 are hinged to the bottom of the connecting plate 6. The pushing plates 7 are elastically matched with the connecting plate 6; In order to drive the pushing plate 7 to move between the filter screen 4 and the crusher 3, a cross plate 2 is fixedly arranged on the side of the connecting plate 6 away from the crusher 3 and near the top. The cross plate 2 is slidably installed on the frame 1. During actual use, the cross plate 2 can drive the connecting plate 6 and the pushing plate 7 to move, so as to push the large-sized waste materials staying on the top of the filter screen 4 out of the filter screen 4. Then, the staff collects these waste materials that have not passed through the filter screen 4 and re-invests them into the crusher 3.

[0022] Through the above method, the waste staying on the top of the filter screen 4 can be cleaned. However, due to the high hardness and certain brittleness of the neodymium iron boron waste, when the neodymium iron boron waste gets stuck on the filter screen 4, cleaning the neodymium iron boron waste by continuously pushing with the above-mentioned pushing plate 7 will cause damage to the filter screen 4. Based on this, in this solution, a winding component connected to the pushing plate 7 is arranged at the cross plate 2, and the winding component is connected to the pushing plate 7 through a traction rope 16. The winding component is driven by a rotating shaft 8 below the cross plate 2. When the pushing plate 7 encounters waste stuck on the filter screen 4 during the moving process, the pushing plate 7 will be squeezed, so that the pushing plate 7 can deflect towards the rotating shaft 8 relative to the connecting plate 6, thereby enabling the winding component cooperating with the pushing plate 7 to be driven by the rotating shaft 8 to rotate, so that the pushing plate 7 can continuously deflect upward against the elastic force between it and the connecting plate 6. When the rotating shaft 8 is disengaged from the winding component, the deflected pushing plate 7 can quickly bounce down and impact the neodymium iron boron waste stuck on the filter screen 4. Since the neodymium iron boron is highly brittle, through the impact of the pushing plate 7 on the neodymium iron boron, the neodymium iron boron waste stuck on the filter screen 4 can be broken, and the broken neodymium iron boron waste is easier to clean or directly fall onto the conveyor belt through the filter screen 4. As Figures 1 - 10 shown, the winding component includes a collar 15 sleeved outside the rotating shaft 8, and the above-mentioned traction rope 16 is fixedly connected between the pushing plate 7 and the outer peripheral wall of the collar 15. A limiting rod 20 is elastically connected to the wall of the collar 15. Refer to Figures 7 - 9 shown, a plurality of pressing blocks 19 are elastically connected to the outer peripheral wall of the rotating shaft 8. The plurality of pressing blocks 19 are arranged in one-to-one correspondence with the collar 15 outside the rotating shaft 8. When one end of the limiting rod 20 approaches the rotating shaft 8 and contacts the pressing block 19 rotating with the rotating shaft 8, the rotating shaft 8 can drive the collar 15 to rotate, thereby winding the traction rope 16 through the collar 15, and the pushing plate 7 is pulled to deflect upward.

[0023] Further, two pressure rings 13 are symmetrically arranged outside the collar 15. The pressure rings 13 are semi-circular structures. When the two pressure rings 13 are fitted together, they can form a complete circle. During the process of the two pressure rings 13 approaching each other, the limiting rod 20 will be squeezed to move one end towards the rotating shaft 8 and cooperate with the pressing block 19. Refer to Figures 7 - 9 shown, a slope 1901 is arranged at one end of the pressing block 19 close to the limiting rod 20. During the process of the rotating shaft 8 driving the pressing block 19 to rotate, the slope 1901 on the pressing block 19 will contact the protruding limiting rod 20, so that the rotating shaft 8 can drive the collar 15 to rotate.

[0024] In order to drive the two pressure rings 13 outside the collar 15 to approach each other, a protrusion 701 is fixedly provided on one side of the push plate 7 close to the rotating shaft 8 in this solution. A lifting unit is arranged on the top of the protrusion 701. A connecting shaft 11 is arranged below the cross plate 2. An connecting ear plate 1301 is integrally formed at the top end position of the pressure ring 13. Two external threads with opposite spiral directions are arranged at the position of the connecting shaft 11 close to the connecting ear plate 1301, so that the connecting shaft 11 passes through the connecting ear plate 1301 and is threadedly connected thereto. When the connecting shaft 11 rotates, the two connecting ear plates 1301 can be driven to approach or separate from each other. When the push plate 7 deflects upward, the lifting unit can be driven to move upward synchronously, thereby driving the connecting shaft 11 to rotate, so that the two pressure rings 13 outside the collar 15 can approach each other.

[0025] During actual use, the neodymium iron boron waste crushed by the crusher 3 will fall onto the filter screen 4. The qualified-sized ones will pass through the filter screen 4 and fall onto the conveyor belt for transportation, while the waste with larger sizes will remain on the top of the filter screen 4. When it is necessary to clean the neodymium iron boron waste remaining on the top of the filter screen 4, the cross plate 2 can be driven to drive the connecting plate 6 to move between the crusher 3 and the filter screen 4. Since the bottom of the push plate 7 can contact the filter screen 4, therefore, the waste remaining on the top of the filter screen 4 can be pushed out by the push plate 7; When a neodymium iron boron waste is stuck on the filter screen 4, the push plate 7 will be squeezed by the stuck waste during the process of moving along the filter screen 4, so that the push plate 7 deflects upward relative to the connecting plate 6 and drives the connecting shaft 11 to rotate through the lifting unit. Figure 10 Here, m represents the neodymium iron boron waste stuck on the filter screen 4. When the two pressure rings 13 outside the collar 15 are driven to approach each other by the connecting shaft 11, the limiting rod 20 can be pushed, so that one end of the limiting rod 20 extends to the rotating shaft 8 and can cooperate with the pressure block 19. Specifically, during the rotation of the rotating shaft 8, when the pressure block 19 rotates to one side of the limiting rod 20 and contacts it, the rotating shaft 8 can drive the collar 15 to rotate through the cooperation of the inclined surface 1901 on the pressure block 19 and the limiting rod 20. When the collar 15 rotates, it can wind the traction rope 16 and further drive the push plate 7 to deflect upward, so that the push plate 7 moves away from the waste stuck on the filter screen 4. Here, the speed of the cross plate 2 driving the push plate 7 to move in the horizontal direction is slow, while the rotation speed of the rotating shaft 8 is fast, so that there is sufficient time for the collar 15 to rotate to drive the push plate 7 to deflect upward and move away from the stuck waste; As the push plate 7 deflects upward, the lifting unit will also move upward to the limit position. At this time, the push plate 7 stops deflecting upward, so that the pressure between the pressure block 19 and the limit rod 20 increases, so that the pressure block 19 is finally compressed into the rotating shaft 8 and disengaged from the limit rod 20. Under the elastic force between the push plate 7 and the connecting plate 6, the push plate 7 can be driven to deflect downward quickly and hit the NdFeB waste stuck on the filter 4. Since NdFeB waste has high brittleness, when the push plate 7 deflects downward and hits the NdFeB waste, the NdFeB waste can be crushed, so that the waste can be cleaned by the push plate 7 or directly fall onto the conveyor belt through the filter 4, which is beneficial to protect the filter 4 and make the overall operation of the device smooth.

[0026] To sum up, this device can, through the push plate 7, clean up the NdFeB waste retained on the filter screen 4 on the one hand; on the other hand, when larger NdFeB waste cannot pass through the filter screen 4 and is stuck, the push plate 7 can quickly rebound and crush the stuck NdFeB waste after deflecting upward for a distance, thereby protecting the filter screen 4 to the maximum extent and making the entire pushing process more stable.

[0027] Reference Figures 1 - 2 As shown, in order to drive the cross plate 2 to move, the present invention has slide bars 201 slidably mounted on both sides of the top of the rack 1. Specifically, a slide rail can be fixed on the rack 1 so that the slide bar 201 is slidably assembled on the slide rail and can only slide along the length direction of the rack 1. A support frame is fixedly arranged between the slide bar 201 and the cross plate 2. Figure 2 It can be seen that a driving gear 5 is provided above one of the slide bars 201, and a transmission tooth meshing with the driving gear 5 is provided on the top of the slide bar 201. The driving gear 5 is rotatably mounted on the frame 1 and is connected to the driving motor on the frame 1. The forward and reverse rotation of the driving motor can drive the cross plate 2 to move in the horizontal direction.

[0028] In order to install the rotating shaft 8, support plates are fixedly provided on both sides of the bottom of the horizontal plate 2. The rotating shaft 8 passes through the support plates and rotates with them through bearings. In order to drive the rotating shaft 8 to rotate, this solution installs a motor on the top of the horizontal plate 2. One end of the rotating shaft 8 passes through the support plate and is connected to the output shaft of the motor through a belt or chain drive.

[0029] Combine Figures 1 - 3As shown, wing plates 401 are provided on both sides of the filter screen 4. The wing plates 401 are fixedly connected to the filter screen 4. A sliding sleeve 4012 is fixedly provided at the top of the wing plate 401, and a sliding plate 4011 that is slidably connected to the sliding sleeve 4012 is fixedly provided at the bottom of the crusher 3. The sliding plate 4011 and the sliding sleeve 4012 are elastically matched. In this way, the filter screen 4 is elastically connected to the crusher 3, or the wing plate 401 on the side of the filter screen 4 can also be directly elastically connected to the frame 1. In this way, a vibration motor can be installed on the wing plate 401. In the initial state, the pushing plate 7 moves out of the filter screen 4. The vibration motor can drive the filter screen 4 to vibrate, which is beneficial to the screening of the filter screen 4. Of course, the filter screen 4 can also be slidably assembled on the frame 1, and the filter screen 4 can be driven to slide back and forth left and right through the cooperation of structures such as a crank-slider, which can also improve the screening effect.

[0030] Refer to Figure 5 As shown, an installation plate is sleeved outside the collar 15, so that the collar 15 passes through the installation plate and is rotatably matched with it, and the installation plate is fixed to the bottom of the cross plate 2. A guide rod 12 is fixedly provided on the outer peripheral wall of the pressing ring 13, and a guide plate is fixedly provided at the bottom of the cross plate 2, so that the guide rod 12 passes through the guide plate and is slidably matched with it.

[0031] A boss 601 is fixedly provided on one side surface of the connecting plate 6 close to the protrusion 701. Spring seats are fixedly provided on the surfaces of the boss 601 and the pushing plate 7 facing each other. An arc-shaped limiting spring 10 is connected between the two spring seats to achieve the elastic cooperation between the pushing plate 7 and the connecting plate 6. The above-mentioned towing rope 16 passes through the boss 601 and is slidably matched with it.

[0032] Combined with Figures 5 - 6 As shown, the lifting unit includes a bracket 1401 provided above the protrusion 701. A roller 14 is rotatably installed at the bottom end of the bracket 1401. The roller 14 is attached to the top of the protrusion 701. The bracket 1401 passes through the boss 601 and is slidably matched with it. A rack 17 is fixedly provided at one end of the bracket 1401 passing through the boss 601. A driven gear 9 meshing with the rack 17 is rotatably sleeved outside the connecting shaft 11 through a bearing. A stop portion 1402 is integrally formed on the bracket 1401. When the stop portion 1402 moves upward and contacts the bottom surface of the boss 601, it can be blocked. At this time, the bracket 1401 moves upward to the limit position. Of course, a notch for the rack 17 to pass through can be opened on the cross plate 2 to avoid interference between the rack 17 and the cross plate 2.

[0033] Hanging plates are rotatably installed at both ends of the connecting shaft 11, and the hanging plates are fixedly installed at the bottom of the cross plate 2; Combined with Figure 6 、 Figure 11As shown, when the driven gear 9 is installed, a clamping block 1101 can be elastically connected to the outer peripheral wall of the connecting shaft 11 through a spring. A clamping groove matching with the clamping block 1101 is provided on the inner wall of the driven gear 9. One end of the clamping block 1101 inside the clamping groove is of a spherical structure. In the initial state, one end of the clamping block 1101 is inserted into the clamping groove. The driven gear 9 can drive the connecting shaft 11 to rotate through the cooperation between the clamping block 1101 and the clamping groove. When the pressure between the clamping block 1101 and the side edge of the clamping groove increases, one end of the clamping block 1101 can move out of the clamping groove.

[0034] Referring to Figures 7 - 9 As shown, a strip-shaped groove for slidingly fitting with the pressing block 19 is provided on the outer peripheral wall of the rotating shaft 8. A telescopic rod 18 is fixedly arranged between the inner end face of the strip-shaped groove and the pressing block 19. Specifically, the telescopic rod 18 includes a sliding rod and a rod sleeve that are slidingly fitted. When the pressing block 19 is pressed and contracts into the strip-shaped groove, the sliding rod can compress the gas inside the rod sleeve. In addition, a first spring can be provided between the inner end face of the strip-shaped groove and the pressing block 19. Through the cooperation of the telescopic rod 18 and the first spring, the rotating shaft 8 can drive the collar 15 to rotate and finally drive the pushing plate 7 to deflect upward.

[0035] From Figure 8 It can be seen from [here] the connection method between the connecting plate 6 and the pushing plate 7. Specifically, a groove can be provided at the top of the pushing plate 7, and a bushing 602 is arranged at the groove. The bushing 602 is fixedly connected to the connecting plate 6. A pin shaft is fixedly arranged on the pushing plate 7 at the groove. The pin shaft passes through the bushing 602 and is rotationally fitted with it. In order to position the pushing plate 7, a baffle 603 can be fixedly arranged on one side of the connecting plate 6 away from the rotating shaft 8. The baffle 603 extends downward to one side of the pushing plate 7, so that the pushing plate 7 can maintain a vertical state initially.

[0036] From Figure 9 It can be seen from [here] that a "cross" groove for slidingly fitting with the limiting rod 20 is provided on the collar 15. Bulges 2001 are integrally formed at the bottom and the bottom of the limiting rod 20. The bulges 2001 and the limiting rod 20 slide in the "cross" groove, and a second spring is provided between the bulges 2001 and the end face of the "cross" groove to achieve the elastic cooperation between the limiting rod 20 and the collar 15.

Claims

1. A pretreatment device for the recycling and reuse of neodymium iron boron waste, comprising a crusher (3) and a filter screen (4) arranged below the crusher (3). A connecting plate (6) is slidably arranged between the lower outlet of the crusher (3) and the filter screen (4). A cross plate (2) is fixedly arranged on the side of the connecting plate (6) away from the crusher (3), and it is characterized in that: A plurality of pushing plates (7) for pushing the waste on the top of the filter screen (4) are hinged to the bottom of the connecting plate (6), and the pushing plates (7) are elastically matched with the connecting plate (6); A winding assembly connected to the pushing plate (7) is arranged at the cross plate (2), and the winding assembly is connected to the pushing plate (7) through a traction rope (16). The winding assembly is driven to rotate by a rotating shaft (8) below the cross plate (2). When the pushing plate (7) is squeezed by the waste on the filter screen (4) and deflects upward, the winding assembly cooperating with the pushing plate (7) can be driven to rotate by the rotating shaft (8), so that the pushing plate (7) can continuously deflect upward against the elastic force between it and the connecting plate (6). After the rotating shaft (8) is disengaged from the winding assembly, the deflected pushing plate (7) can rebound and strike the neodymium iron boron waste stuck on the filter screen (4).

2. The pretreatment equipment for the recycling and reuse of neodymium-iron-boron waste according to claim 1, characterized in that: The winding assembly includes a collar (15) sleeved outside the rotating shaft (8). The traction rope (16) is fixed between the pushing plate (7) and the collar (15). A limiting rod (20) is elastically connected to the circumferential wall of the collar (15). A pressing block (19) cooperating with the limiting rod (20) is elastically connected to the outer circumferential wall of the rotating shaft (8). Two pressing rings (13) are symmetrically arranged outside the collar (15). During the process of the two pressing rings (13) approaching each other, the limiting rod (20) will be squeezed and move towards the direction close to the rotating shaft (8). A slope (1901) is arranged at one end of the pressing block (19) close to the limiting rod (20).

3. The pretreatment equipment for recycling neodymium iron boron waste according to claim 2, characterized in that: A protrusion (701) is fixedly arranged on one side of the pushing plate (7) close to the rotating shaft (8). A lifting unit is arranged on the top of the protrusion (701). A connecting shaft (11) is arranged below the cross plate (2). A connecting ear plate (1301) is integrally formed at the top end position of the pressing ring (13). Two sections of external threads with opposite helical directions are arranged at the position of the connecting shaft (11) close to the connecting ear plate (1301), so that the connecting shaft (11) passes through the connecting ear plate (1301) and is threadedly connected to the connecting ear plate (1301). When the pushing plate (7) deflects upward, it can drive the lifting unit to move upward synchronously, thereby driving the connecting shaft (11) to rotate.

4. The pretreatment equipment for the recycling and reuse of neodymium-iron-boron waste according to claim 3, characterized in that: A boss (601) is fixedly arranged on one side of the connecting plate (6) close to the protrusion (701). An arc-shaped limiting spring (10) is connected between the boss (601) and the pushing plate (7).

5. The pretreatment equipment for the recycling and reuse of neodymium-iron-boron waste according to claim 4, characterized in that: The lifting unit includes a bracket (1401) disposed above the protrusion (701). A roller (14) is rotatably installed at the bottom end of the bracket (1401). The roller (14) is in contact with the top of the protrusion (701). The bracket (1401) passes through the boss (601) and is in sliding fit with it. One end of the bracket (1401) passing through the boss (601) is fixedly provided with a rack (17). A driven gear (9) meshing with the rack (17) is sleeved on the outer side of the connecting shaft (11). A stop portion (1402) is integrally formed on the bracket (1401). When the bracket (1401) moves upward to the limit position, the stop portion (1402) can contact the bottom surface of the boss (601).

6. The pretreatment equipment for recycling neodymium-iron-boron waste according to claim 2, characterized in that: A strip-shaped groove for sliding cooperation with the pressing block (19) is formed on the outer peripheral wall of the rotating shaft (8). A telescopic rod (18) is fixedly provided between the inner end face of the strip-shaped groove and the pressing block (19).

7. The pretreatment equipment for the recycling and reuse of neodymium-iron-boron waste according to claim 6, characterized in that: A first spring is provided between the inner end face of the strip-shaped groove and the pressing block (19).

8. A pretreatment device for the recycling and reuse of neodymium-iron-boron waste, characterized in that: A baffle (603) is fixedly provided on the side of the connecting plate (6) away from the rotating shaft (8). The baffle (603) extends downward to one side of the pushing plate (7), so that the pushing plate (7) can be kept in a vertical state initially.

9. The pretreatment equipment for the recycling and reuse of neodymium iron boron waste according to claim 2, characterized in that: The pressing ring (13) is of a semi-circular structure. When the two pressing rings (13) are in contact with each other, they can form a complete circle.

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