PVC pipeline recycling device

By designing PVC pipe recycling and utilization devices, including cleaning boxes, crushing components and filtering components, the problem of insufficient cleaning and crushing of pipes is solved, effective screening and re-crumbing of particles is achieved, recycling efficiency and particle consistency is improved, and the Manual operation.

CN119159707AInactive Publication Date: 2024-12-20QIANXIN (GUANGZONG COUNTY) PLASTIC PIPE CO LTD
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Patent Information

Application Number
CN202411481407.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2024-12-20
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the prior art, during the recycling process of PVC pipelines, the pipes are not cleaned and crushed due to adhering soil and other debris. The crusher needs to manually insert the pipes, which are inefficient and uneven crushing, resulting in the particles not meeting the standards.

Method used

A PVC pipe recycling device is designed, including a cleaning box, crushing assembly, filtering assembly and re-screening assembly. The pipe is cleaned through the cleaning box, crushing assembly, filtering assembly screens the particles, and crushing through the re-screening assembly and Filtrate to ensure that the particles meet standards and reduce manual operation.

Benefits of technology

It realizes effective cleaning and sufficient crushing of PVC pipes, improves process efficiency, ensures consistency in size of particles, reduces workload for workers, and has a simple structure and convenient operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a PVC pipeline recycling device which comprises a first box body, a containing groove is formed in the top of the first box body, a cleaning box is arranged in the containing groove, the cleaning box penetrates through the side wall of the containing groove and is in sliding fit with the first box body, a cleaning assembly is arranged in the cleaning box, and a second box body is arranged on one side of the first box body. The end, penetrating through the side wall of the containing groove, of the cleaning box is located in the second box body, a crushing assembly and a filtering assembly are installed in the second box body, the filtering assembly is located under the crushing assembly, a collecting box is slidably arranged on the bottom wall of the second box body and penetrates through the first box body, and a third box body is fixedly connected to the side, away from the first box body, of the second box body. And a secondary screening assembly is arranged in the third box body. The PVC pipe crushing device is simple in structure, convenient to operate, capable of cleaning PVC pipes and sufficient in crushing.
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Description

Technical Field

[0001] The invention relates to the technical field of PVC pipe recycling, in particular to a PVC pipe recycling device. Background Art

[0002] PVC pipe refers to a pipe made of polyvinyl chloride resin, a raw material. PVC is a white powder with an amorphous structure. During the production and use of PVC pipes, a large amount of damaged and non-standard waste will appear. In order to save costs and prevent it from polluting the environment, it is generally necessary to recycle the PVC pipes, obtain PVC particles by cleaning and crushing, and then obtain new PVC products or semi-finished products by cleaning, drying, melt blending, and extrusion molding. In the prior art, the pipes are generally directly inserted into a grinder for crushing. Since the waste of PVC pipes is attached with a large amount of soil and other debris after use, it is not conducive to the later treatment of PVC particles. In addition, the grinder has the problem of insufficient crushing during crushing, and some of the obtained particles do not meet the size standards. Therefore, there is an urgent need for a PVC pipe recycling device that can clean and fully crush PVC pipes. Summary of the invention

[0003] The purpose of the present invention is to provide a PVC pipe recycling device to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a PVC pipe recycling device, comprising a first box body, a receiving groove is opened on the top of the first box body, a cleaning box is arranged in the receiving groove, the cleaning box passes through the side wall of the receiving groove and slides with the first box body, a cleaning assembly is arranged in the cleaning box, a second box body is arranged on one side of the first box body, one end of the cleaning box passing through the side wall of the receiving groove is located in the second box body, a crushing assembly and a filtering assembly are installed in the second box body, the filtering assembly is located directly below the crushing assembly, a collecting box is slidably arranged on the bottom wall of the second box body, the collecting box passes through the first box body, a third box body is fixedly connected to the side of the second box body away from the first box body, and a re-screening assembly is arranged in the third box body.

[0005] Preferably, the bottom wall of the cleaning box includes a main frame and two flaps rotatably connected to the main frame, the two flaps are symmetrically arranged, a plurality of water-permeable holes are opened on the flaps, and a torsion spring is installed at the rotation point between the flaps and the main frame to keep the two flaps in a closed state.

[0006] Preferably, the cleaning assembly includes a plurality of rotating shafts located in the cleaning box and rotatably connected to the inner wall of the cleaning box, the plurality of rotating shafts are arranged in parallel, a cleaning roller is fixedly connected to the rotating shaft, a plurality of cleaning brushes are fixedly connected to the cleaning roller, a driving motor for controlling the rotation of the rotating shaft is installed at one end of the cleaning box located in the second box body, and a feed port is provided at the top of the cleaning box; a water tank is fixedly connected to the first box body, a water inlet pipe and a water outlet pipe are connected between the water tank and the bottom wall of the receiving tank, and water pumps are installed in the middle of the water inlet pipe and the water outlet pipe.

[0007] Preferably, the crushing assembly includes a block fixedly connected to the inner wall of the second box body, a through hole is opened in the middle of the block, and the top surface of the block is an inverted cone surface, two crushing rollers are rotatably connected to the second box body, and the two crushing rollers rotate towards each other, and two auxiliary rollers are rotatably connected to the second box body, the two auxiliary rollers are arranged in a one-to-one correspondence with the two crushing rollers and the two auxiliary rollers are located on both sides of the two crushing rollers, the corresponding auxiliary rollers and the crushing rollers have the same direction, and a rotating motor for controlling the rotation of the crushing rollers and the auxiliary rollers is installed on the outer wall of the second box body.

[0008] Preferably, the filter assembly includes a filter plate located in the second box and arranged corresponding to the two crushing rollers, one end of the filter plate is rotatably connected to the inner wall of the second box, the other end of the filter plate passes through the side wall of the second box and is located in the first box, a groove for the end of the filter plate to slide is provided in the first box, the end of the filter plate is located in the groove, one end of the filter plate located in the groove is higher than the other end, an installation box is fixedly connected to the bottom of one end of the filter plate located in the groove, a vibration motor is fixedly connected to the installation box, an eccentric wheel is fixedly connected to the output shaft of the vibration motor, and a number of return springs are fixedly connected between the installation box and the bottom wall of the groove and between the filter plate and the top wall of the groove.

[0009] Preferably, the re-screening assembly includes a lifting box located in the third box body and slidably connected to the inner wall of the third box body, an opening is opened between the second box body and the third box body, the opening is arranged corresponding to one end of the filter plate away from the groove, the lifting box is arranged corresponding to the opening, a moving plate is rotatably connected to one side of the lifting box close to the opening, a tension spring is fixedly connected between the moving plate and the bottom wall of the lifting box, the moving plate abuts against the inner wall of the third box body, a plurality of parallel vertical rods are fixedly connected in the opening, the distance between two adjacent vertical rods is less than the length of the moving plate, and a multi-stage telescopic cylinder is fixedly connected between the bottom wall of the third box body and the bottom wall of the lifting box; a connecting port is opened in the block, one end of the connecting port is connected with the through hole, and the other end of the connecting port passes through the side wall of the third box body and is connected with the third box body, the connecting port is inclined, one end of the connecting port connected with the through hole is lower than the other end, and the size of the connecting port is larger than the size of the moving plate.

[0010] The present invention discloses the following technical effects: the present invention slides the cleaning box and the receiving tank together, and after cleaning the PVC pipe with the cleaning assembly, the PVC pipe can be carried into the second box, so that the cleaned pipe falls into the crushing assembly, and is crushed into PVC particles by the crushing assembly, and then screened by the filtering assembly. The ones that meet the standards fall into the collection box for collection, and the ones that do not meet the standards enter the re-screening assembly for crushing and filtering again, thereby ensuring the crushing effect of the PVC pipe. In addition, there is no need for workers to hold the PVC pipe and insert it into the crusher, which reduces the workload of workers. The present invention has a simple structure and is easy to operate, and can clean and crush the PVC pipe sufficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 This is a schematic diagram of the structure of the recycling device of the present invention;

[0013] Figure 2 This is a schematic structural diagram of the bottom wall of the cleaning box of the present invention;

[0014] Among them: 1. first box body; 2. containing tank; 3. cleaning box; 4. second box body; 5. collecting box; 6. third box body; 7. main frame; 8. flap; 9. water permeable hole; 10. rotating shaft; 11. cleaning roller; 12. cleaning brush; 13. driving motor; 14. feeding port; 15. water tank; 16. water inlet pipe; 17. water outlet pipe; 18. water pump; 19. block; 20. through hole; 21. crushing roller; 22. auxiliary roller; 23. filter plate; 24. groove; 25. vibration motor; 26. eccentric wheel; 27. reset spring; 28. lifting box; 29. ​​opening; 30. moving plate; 31. tension spring; 32. vertical rod; 33. connecting port; 34. multi-stage telescopic cylinder. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Reference Figure 1-2 The present invention provides a PVC pipe recycling device, comprising a first box body 1, a receiving groove 2 is opened on the top of the first box body 1, a cleaning box 3 is arranged in the receiving groove 2, the cleaning box 3 passes through the side wall of the receiving groove 2 and slides with the first box body 1, a cleaning component is arranged in the cleaning box 3, a second box body 4 is arranged on one side of the first box body 1, one end of the cleaning box 3 passing through the side wall of the receiving groove 2 is located in the second box body 4, a crushing component and a filtering component are installed in the second box body 4, the filtering component is located directly below the crushing component, a collecting box 5 is slidably arranged on the bottom wall of the second box body 4, the collecting box 5 passes through the first box body 1, a third box body 6 is fixedly connected to the side of the second box body 4 away from the first box body 1, and a re-screening component is arranged in the third box body 6. By slidingly matching the cleaning box 3 with the containing tank 2, after the PVC pipe is cleaned by the cleaning component, the PVC pipe can be carried to the second box 4, so that the cleaned pipe falls into the crushing component, is crushed by the crushing component to become PVC particles, and then is screened by the filtering component. Those that meet the standards fall into the collecting box 5 for collection, and those that do not meet the standards enter the re-screening component to be crushed and filtered again, thereby ensuring the crushing effect of the PVC pipe.

[0018] Further optimization scheme, the bottom wall of the cleaning box 3 includes a main frame 7 and two flaps 8 rotatably connected to the main frame 7. The two flaps 8 are symmetrically arranged, and a plurality of water-permeable holes 9 are opened on the flaps 8. A torsion spring that keeps the two flaps 8 in a closed state is installed at the rotation point between the flaps 8 and the main frame 7. By arranging the flaps 8 on the bottom wall of the cleaning box 3, after the cleaning is completed, the cleaning box 3 can be moved to the top of the crushing assembly, and the flaps 8 can be opened, so that the PVC pipe inside can be directly moved into the crushing assembly for crushing, and the worker does not need to hold the PVC pipe and insert it into the crusher, thereby improving the work efficiency.

[0019] Further optimization scheme, the cleaning assembly includes a plurality of rotating shafts 10 located in the cleaning box 3 and rotatably connected to the inner wall of the cleaning box 3, the plurality of rotating shafts 10 are arranged in parallel, a cleaning roller 11 is fixedly connected to the rotating shaft 10, a plurality of cleaning brushes 12 are fixedly connected to the cleaning roller 11, a driving motor 13 for controlling the rotation of the rotating shaft 10 is installed at one end of the cleaning box 3 located in the second box body 4, and a feed port 14 is provided at the top of the cleaning box 3; a water tank 15 is fixedly connected in the first box body 1, a water inlet pipe 16 and a water outlet pipe 17 are connected between the water tank 15 and the bottom wall of the receiving tank 2, and a water pump 18 is installed in the middle of the water inlet pipe 16 and the water outlet pipe 17. The water in the water tank 15 is supplied into the receiving tank 2 through the water pump 18, so that the water flows into the cleaning box 3 through the water permeable hole 9, and then the driving motor 13 is started, and the driving motor 13 drives the rotating shaft 10 to rotate, and then drives the cleaning roller 11 and the cleaning brush 12 to rotate, so as to clean the internal PVC pipe.

[0020] Further optimization scheme, the crushing assembly includes a stopper 19 fixedly connected to the inner wall of the second box body 4, a through hole 20 is opened in the middle of the stopper 19, the top surface of the stopper 19 is an inverted cone, two crushing rollers 21 are rotatably connected in the second box body 4, the two crushing rollers 21 rotate in opposite directions, and two auxiliary rollers 22 are rotatably connected in the second box body 4. The two auxiliary rollers 22 are arranged one-to-one with the two crushing rollers 21 and the two auxiliary rollers 22 are located on both sides of the two crushing rollers 21. The corresponding auxiliary rollers 22 have the same direction as the crushing rollers 21, and a rotating motor for controlling the rotation of the crushing rollers 21 and the auxiliary rollers 22 is installed on the outer wall of the second box body 4. The crushing rollers 21 and the auxiliary rollers 22 can be driven by the rotating motor to fully crush the PVC pipe. The auxiliary rollers 22 are in the same direction as the corresponding crushing rollers 21, which can prevent the PVC pipe from moving to both sides, so that it is easy to be crushed by the two crushing rollers 21.

[0021] Further optimization scheme, the filter assembly includes a filter plate 23 located in the second box body 4 and corresponding to the two crushing rollers 21, one end of the filter plate 23 is rotatably connected to the inner wall of the second box body 4, the other end of the filter plate 23 penetrates the side wall of the second box body 4 and is located in the first box body 1, a groove 24 is provided in the first box body 1 for the end of the filter plate 23 to slide, the end of the filter plate 23 is located in the groove 24, one end of the filter plate 23 located in the groove 24 is higher than the other end, the bottom of one end of the filter plate 23 located in the groove 24 is fixedly connected with a mounting box, a vibration motor 25 is fixedly connected in the mounting box, an eccentric wheel 26 is fixedly connected to the output shaft of the vibration motor 25, and a plurality of reset springs 27 are fixedly connected between the mounting box and the bottom wall of the groove 24 and between the filter plate 23 and the top wall of the groove 24. The vibration motor 25 drives the eccentric wheel 26 to rotate, so that it drives the filter plate 23 to move up and down, so that the particles on the filter plate 23 can be fully filtered, and at the same time, it is convenient for the particles that do not meet the standards to move to the opening 29 for collection.

[0022] A further optimized solution is that the re-screening assembly includes a lifting box 28 located in the third box body 6 and slidably connected to the inner wall of the third box body 6. An opening 29 is provided between the second box body 4 and the third box body 6. The opening 29 is provided corresponding to the end of the filter plate 23 away from the groove 24. The lifting box 28 is provided corresponding to the opening 29. A moving plate 30 is rotatably connected to the side of the lifting box 28 close to the opening 29. A tension spring 31 is fixedly connected between the moving plate 30 and the bottom wall of the lifting box 28. The moving plate 30 abuts against the inner wall of the third box body 6. A plurality of parallel vertical rods 32 are fixedly connected in the opening 29. The distance between two adjacent vertical rods 32 is less than the length of the moving plate 30, and a multi-stage telescopic cylinder 34 is fixedly connected between the bottom wall of the third box body 6 and the bottom wall of the lifting box 28; the multi-stage telescopic cylinder 34 is an electric cylinder with multiple telescopic rods, which can perform telescopic operations over a longer distance. A connecting port 33 is opened in the block 19, one end of the connecting port 33 is connected to the through hole 20, and the other end of the connecting port 33 passes through the side wall of the third box body 6 and is connected to the third box body 6. The connecting port 33 is inclined, and one end of the connecting port 33 connected to the through hole 20 is lower than the other end, and the size of the connecting port 33 is larger than the size of the moving plate 30. After the particles are screened by the filter plate 23, those that do not meet the standards move through the opening 29 into the lifting box 28. When too many particles accumulate in the lifting box 28, the multi-stage telescopic cylinder 34 is started to drive the lifting box 28 to move upward. During the movement, since a vertical rod 32 is provided at the opening 29, the moving plate 30 can be limited so that it does not move. Until the lifting box 28 moves to the connecting port 33, the moving plate 30 moves under the action of the tension spring 31 and the gravity of the particles, so that the lifting box 28 opens, and the internal particles move through the connecting port 33 into the through hole 20, so that they are crushed and filtered again to ensure the crushing effect.

[0023] Working process of the present invention: when in use, the cut PVC pipe is placed in the cleaning box 3. At this time, the side walls of the first box body 1 and the second box body 4 support the two flaps 8 to keep them in a closed state. Then, water is passed into the containing tank 2 through the water inlet pipe 16 to enter the cleaning box 3 through the water permeable hole 9. Then, the rotating shaft 10 is driven to rotate by the driving motor 13, thereby driving the cleaning roller 11 and the cleaning brush 12 to rotate to clean the internal PVC pipe. After cleaning, the water is transported back to the water tank 15 through the water outlet pipe 17. Then, the cleaning box 3 is pushed and the cleaning box 3 moves to the second box body 4. At this time, the side walls of the first box body 1 and the second box body 4 no longer support the flap 8. The worker can hold a stick to push the flap 8 open to open it. Then, the PVC pipe moves to the crushing roller 21 through the through hole 20 and is crushed by the relative rotation of the two crushing rollers 21. The crushed particles move to the filter plate 23, and the vibration motor 25 drives the eccentric wheel 26 to rotate, thereby driving the filter plate 23 to vibrate up and down continuously, so that the particles can be fully filtered and will not block the filter plate 23. The particles that meet the standards move to the collection box 5 to prepare for the next process, and the particles that do not meet the standards move to the lifting box 28 through the opening 29. Then, when the lifting box 28 is accumulated to a certain extent, the lifting box 28 is driven upward by the multi-stage telescopic cylinder 34. Since a vertical rod 32 is fixed at the opening 29, the moving plate 30 will not flip outward. When the moving plate 30 moves to the connecting port 33, the moving plate 30 is deflected under the action of the tension spring 31 and the gravity of the PVC particles, so that the lifting box 28 is opened, and the PVC particles move to the through hole 20 through the connecting port 33, so that they are crushed and filtered again, thereby ensuring the crushing effect.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A PVC pipe recycling device, characterized in that: The invention comprises a first box body (1), wherein a receiving groove (2) is provided on the top of the first box body (1), a cleaning box (3) is arranged in the receiving groove (2), the cleaning box (3) passes through the side wall of the receiving groove (2) and is slidably matched with the first box body (1), a cleaning component is arranged in the cleaning box (3), a second box body (4) is arranged on one side of the first box body (1), one end of the cleaning box (3) passing through the side wall of the receiving groove (2) is located in the second box body (4), a crushing component and a filtering component are installed in the second box body (4), the filtering component is located directly below the crushing component, a collecting box (5) is slidably arranged on the bottom wall of the second box body (4), the collecting box (5) passes through the first box body (1), a third box body (6) is fixedly connected to the side of the second box body (4) away from the first box body (1), and a re-screening component is arranged in the third box body (6).

2. A PVC pipe recycling device according to claim 1, characterized in that: The bottom wall of the cleaning box (3) comprises a main frame (7) and two flaps (8) rotatably connected to the main frame (7), the two flaps (8) being symmetrically arranged, a plurality of water-permeable holes (9) being provided on the flaps (8), and a torsion spring for keeping the two flaps (8) in a closed state being installed at the rotation point between the flaps (8) and the main frame (7).

3. A PVC pipe recycling device according to claim 1, characterized in that: The cleaning assembly comprises a plurality of rotating shafts (10) located in the cleaning box (3) and rotatably connected to the inner wall of the cleaning box (3), the plurality of rotating shafts (10) being arranged in parallel, a cleaning roller (11) being fixedly connected to the rotating shaft (10), a plurality of cleaning brushes (12) being fixedly connected to the cleaning roller (11), a driving motor (13) for controlling the rotation of the rotating shaft (10) being installed at one end of the cleaning box (3) located in the second box body (4), and a feed port (14) being provided at the top of the cleaning box (3); a water tank (15) being fixedly connected to the first box body (1), a water inlet pipe (16) and a water outlet pipe (17) being connected between the water tank (15) and the bottom wall of the containing tank (2), and a water pump (18) being installed in the middle of each of the water inlet pipe (16) and the water outlet pipe (17).

4. A PVC pipe recycling device according to claim 1, characterized in that: The crushing assembly comprises a block (19) fixedly connected to the inner wall of the second housing (4), a through hole (20) being provided in the middle of the block (19), the top surface of the block (19) being an inverted cone, two crushing rollers (21) being rotatably connected in the second housing (4), the two crushing rollers (21) rotating towards each other, two auxiliary rollers (22) being rotatably connected in the second housing (4), the two auxiliary rollers (22) being arranged in one-to-one correspondence with the two crushing rollers (21) and the two auxiliary rollers (22) being located on both sides of the two crushing rollers (21), the corresponding auxiliary rollers (22) and the crushing rollers (21) having the same direction of rotation, and a rotating motor for controlling the rotation of the crushing rollers (21) and the auxiliary rollers (22) being installed on the outer wall of the second housing (4).

5. A PVC pipe recycling device according to claim 4, characterized in that: The filter assembly comprises a filter plate (23) located in the second housing (4) and arranged corresponding to the two crushing rollers (21); one end of the filter plate (23) is rotatably connected to the inner wall of the second housing (4); the other end of the filter plate (23) penetrates the side wall of the second housing (4) and is located in the first housing (1); a groove (24) is provided in the first housing (1) for the end of the filter plate (23) to slide; the end of the filter plate (23) is located in the groove (24); one end of the filter plate (23) located in the groove (24) is higher than the other end; a mounting box is fixedly connected to the bottom of one end of the filter plate (23) located in the groove (24); a vibration motor (25) is fixedly connected in the mounting box; an eccentric wheel (26) is fixedly connected to the output shaft of the vibration motor (25); and a plurality of return springs (27) are fixedly connected between the mounting box and the bottom wall of the groove (24) and between the filter plate (23) and the top wall of the groove (24).

6. A PVC pipe recycling device according to claim 5, characterized in that: The re-screening assembly comprises a lifting box (28) located in the third box body (6) and slidably connected to the inner wall of the third box body (6); an opening (29) is provided between the second box body (4) and the third box body (6); the opening (29) is provided corresponding to an end of the filter plate (23) away from the groove (24); the lifting box (28) and the opening (29) are provided correspondingly; a moving plate (30) is rotatably connected to a side of the lifting box (28) close to the opening (29); a tension spring (31) is fixedly connected between the moving plate (30) and the bottom wall of the lifting box (28); the moving plate (30) abuts against the inner wall of the third box body (6); the opening ( A plurality of parallel vertical rods (32) are fixedly connected in the third housing (29), the distance between two adjacent vertical rods (32) is less than the length of the moving plate (30), and a multi-stage telescopic cylinder (34) is fixedly connected between the bottom wall of the third housing (6) and the bottom wall of the lifting box (28); a connecting port (33) is opened in the stopper (19), one end of the connecting port (33) is connected to the through hole (20), and the other end of the connecting port (33) passes through the side wall of the third housing (6) and is connected to the third housing (6), the connecting port (33) is inclined, one end of the connecting port (33) connected to the through hole (20) is lower than the other end, and the size of the connecting port (33) is larger than the size of the moving plate (30).