Polyamide waste recycling and crushing device and crushing method thereof

Abstract

The invention discloses a polyamide waste recycling and crushing device and a crushing method thereof, relates to the related field of polyamide waste recycling, and aims to solve the problems that in the prior art, a spiral feeding structure has a certain height, cyclic waste participates in crushing after crushing is started for a period of time, and after crushing is basically completed, waste cannot be recycled. The problems that a spiral feeding structure needs to wait for feeding all residual waste materials, and the working efficiency needs to be improved are solved. A circulating rotating unit is arranged in the circulating cavity, the circulating rotating unit comprises an outer rotating ring, and first connecting plates are fixed to the outer portion of the outer rotating ring in an array mode; the circulating rotating unit further comprises an outer rotating gear ring, second connecting plates are fixed to the outer portion of the outer rotating gear ring in an array mode, arc-shaped pushing plates are fixed to the outer portions, corresponding to the second connecting plates and the first connecting plates in the front-back mode, of the second connecting plates and the first connecting plates jointly, and transition pushing plates are formed at the ends, in the rotating direction, of the arc-shaped pushing plates. An outer fixing vertical plate is formed at the end, opposite to the rotating direction, of the arc-shaped pushing plate.

Description

Technical Field

[0001] The present invention relates to the field of polyamide waste recycling, and specifically to a polyamide waste recycling and crushing device and a crushing method thereof. Background Art

[0002] Polyamide (PA), commonly known as nylon or polyamide fiber, is an important class of synthetic polymer materials. Due to its wear resistance, high strength, high elasticity and other characteristics, it is widely used in multiple fields such as clothing, household textiles, medical textiles, industrial textiles, home appliance parts, automotive parts, and industrial equipment parts. Among them, nylon 6 and nylon 66 are the main varieties of polyamide fibers in China. With the increasing application amount of polyamide materials, the amount of waste generated also increases correspondingly, which not only causes waste of resources but also brings pressure to the environment. These wastes have high utilization value. Through recycling and reuse, not only can the raw material cost be saved, energy consumption be reduced, but also environmental pollution can be reduced to achieve sustainable development.

[0003] At present, the recycling technologies of polyamide waste are mainly divided into two categories: physical recycling method and chemical recycling method. The physical recycling method mainly reuses the recycled waste polyamide fibers as spinning raw materials after processes such as separation, cleaning, and crushing. The chemical recycling method decomposes the recycled waste polyamide fibers into monomers and then synthesizes them into polyamide for spinning. It can recycle and reuse polyamide waste with complex components, but the energy consumption and cost are relatively high, and the technical difficulty is relatively large. The solid waste of polyamide 6 comes from the following processes in the production process of polyamide 6: ① The waste blocks during the start-up and shutdown of polymerization casting and spinning; ② The chips scattered on the ground during extraction and drying; ③ The waste silk from spinning; ④ The oily waste silk from winding and post-processing. Its recycling can adopt the physical recycling method.

[0004] In the process of polyamide waste recycling, the crushing device is one of the key equipment. The function of the crushing device is to crush the polyamide waste into smaller particles for subsequent separation, cleaning and reuse. In order to ensure complete crushing, a filtration and material circulation and crushing structure is generally set up. For example, the Chinese authorized patent with the publication number CN 222178385 U (a waste recycling device for polyamide fiber materials) intercepts the waste that does not meet the requirements through a filter plate, enters the conveying cylinder through the feed port, and conveys it to the upper part of the crushing mechanism through a circulating conveying mechanism, and then uses the crushing mechanism to crush the waste that does not meet the requirements again, realizing the cyclic crushing of the waste that does not meet the requirements until the crushed waste meets the requirements and falls into the collection box through the filter plate.

[0005] Although the above-mentioned prior art has the function of recycling and crushing waste materials, the spiral feeding structure has a certain height, and it takes some time after the crushing starts for the recycled waste materials to participate in the crushing. After the crushing is basically completed, it is necessary to wait for the spiral feeding structure to complete the feeding of the remaining waste materials; moreover, the cyclic feeding and crushing work are basically synchronized, but two driving structures are still required to cooperate, resulting in redundant driving force. Summary of the Invention

[0006] The purpose of the present invention is to provide a polyamide waste recycling and crushing device and its crushing method to solve the problems proposed in the above background technology, that is, the spiral feeding structure has a certain height, and it takes some time after the crushing starts for the recycled waste materials to participate in the crushing. After the crushing is basically completed, it is necessary to wait for the spiral feeding structure to complete the feeding of the remaining waste materials, and the working efficiency needs to be improved.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A polyamide waste recycling and crushing device includes a crushing outer shell. The front and rear ends of the lower end of the crushing outer shell are welded and fixed with support frames. The crushing outer shell includes a crushing outer box body and a crushing inner box body. The crushing inner box body is located in the middle of the crushing outer box body. The two sides between the crushing outer box body and the crushing inner box body are fixed by side connection plates. A circulation cavity is formed outside between the crushing outer box body and the crushing inner box body;

[0008] A circulation rotating unit is arranged in the circulation cavity. The circulation rotating unit includes an outer rotating ring, and the outer rotating ring is rotatably connected to the outside of one of the side connection plates. A first connection plate is fixedly arranged in an array on the outside of the outer rotating ring; the circulation rotating unit further includes an outer rotating gear ring. A second connection plate is fixedly arranged in an array on the outside of the outer rotating gear ring. An arc-shaped pushing plate is commonly fixed to the outside of the second connection plate and the first connection plate corresponding to the front and back. The outer surface of the arc-shaped pushing plate fits the inner surface of the crushing outer box body. One end of the arc-shaped pushing plate along the rotation direction forms a transition pushing plate, and one end of the arc-shaped pushing plate against the rotation direction forms an outer fixed vertical plate. The height of the outer fixed vertical plate is equal to the width of the circulation cavity;

[0009] A crushing unit is arranged inside the crushing inner box body. The crushing unit includes an intermediate rotating roller. A third rotating gear is arranged in the middle on one side of the crushing outer box body. The third rotating gear is coaxially connected to the intermediate rotating roller. A fourth rotating gear is installed along the upper end of the third rotating gear on one side of the crushing outer box body. The fourth rotating gear meshes with the third rotating gear; a fifth rotating gear is arranged on one side of the circulation cavity. The fifth rotating gear is coaxially connected to the fourth rotating gear, and the fifth rotating gear is meshed and connected to the outer rotating gear ring;

[0010] Second filter holes and first filter holes are respectively penetrated and opened on the outer surfaces of the lower ends of the crushing outer box body and the crushing inner box body. Third filter holes with the same aperture size as the second filter holes and the first filter holes are opened on the arc-shaped pushing plate and the transition pushing plate.

[0011] Preferably, the inner wall of the crushing inner box alternately forms a first inner crushing ring and a second inner crushing ring, and a first outer crushing ring and a second outer crushing ring are alternately fixed to the outside of the intermediate roller. The first outer crushing ring corresponds to the second inner crushing ring in position, and the second outer crushing ring corresponds to the first inner crushing ring in position. Crushing tooth parts are formed on the inner surfaces of the first outer crushing ring and the second outer crushing ring and the outer surfaces of the first inner crushing ring and the second inner crushing ring, and a crushing channel is formed between the first outer crushing ring and the second outer crushing ring and the first inner crushing ring and the second inner crushing ring.

[0012] Preferably, a second driving motor is installed on the other side of the crushing outer box, a first bevel gear is installed at the end of the output shaft of the second driving motor, a second bevel gear is meshed and connected to one side of the first bevel gear, and the second bevel gear is coaxially connected to the intermediate roller.

[0013] Preferably, the crushing outer shell further includes an upper cutting outer box which is located at the upper end of the crushing outer box. A cutting cavity is formed inside the upper cutting outer box. The upper cutting outer box and the crushing outer box are communicated through a feeding port. Feeding inclined plates are formed along the front and rear ends of the upper end of the feeding port inside the upper cutting outer box.

[0014] Preferably, a first transmission wheel is coaxially connected to the outside of the third rotating gear; a cutting unit is arranged inside the cutting cavity. The cutting unit includes a first cutting roller and a second cutting roller. The first cutting roller and the second cutting roller are installed at the front end and the rear end inside the cutting cavity. A second transmission wheel is installed on one side of the upper cutting outer box along one side of the second cutting roller, and the second transmission wheel is coaxially connected to the second cutting roller. The second transmission wheel and the first transmission wheel are connected by a transmission belt.

[0015] Preferably, a sixth rotating gear is installed on the other side of the upper cutting outer box along the other side of the first cutting roller, and the sixth rotating gear is coaxially connected to the first cutting roller. A seventh rotating gear is installed on the other side of the upper cutting outer box along the other side of the second cutting roller, and the seventh rotating gear is coaxially connected to the second cutting roller. Cutting blades are arrayed and fixed on the outside of both the first cutting roller and the second cutting roller, and the cutting blades on the outside of the first cutting roller and the cutting blades on the outside of the second cutting roller are alternately installed.

[0016] Preferably, an upper fixed box is welded and fixed to the upper end of the upper cutting outer box. A limit sliding block is limited and slid inside the upper fixed box. A material pushing plate is fixed to the lower end of the limit sliding block. An upper rectangular slot is formed on the upper end surface of the upper cutting outer box along the sliding track of the limit sliding block.

[0017] Preferably, a first driving motor is installed on one side of the upper end of the upper fixed box body. The output shaft end of the first driving motor is connected to a first rotating gear. The lower end of the first rotating gear is meshed and connected to a second rotating gear. A driving threaded rod is installed in the middle of the upper fixed box body. The driving threaded rod is coaxially connected to the second rotating gear. The driving threaded rod is threadedly connected to the limit sliding block.

[0018] Preferably, the upper end of the front end of the upper cutting outer box body is integrally connected with a feed pipe body. A feed port is formed in the feed pipe body. The feed port communicates with the cutting cavity. The lower end of the feed pipe body extends into the cutting cavity to form a feed inclined plate. The feed inclined plate is inclined towards the area between the first cutting roller and the second cutting roller.

[0019] A crushing method includes the following steps:

[0020] Step 1: The waste material enters the feed pipe body through the feed port and is guided into the cutting cavity along the feed inclined plate;

[0021] Step 2: The second driving motor drives the first bevel gear to rotate. Through the meshing relationship between the first bevel gear and the second bevel gear, the intermediate roller is driven to rotate counterclockwise. Through the coaxial connection relationship between the intermediate roller and the first transmission wheel, the first transmission wheel is driven to rotate. The second cutting roller rotates counterclockwise through the transmission relationship of the second transmission wheel, the transmission belt and the first transmission wheel. The first cutting roller rotates clockwise through the meshing connection relationship between the sixth rotating gear and the seventh rotating gear. The cutting blades on the first cutting roller and the second cutting roller cut the waste material blocks, waste material slices and waste material wires;

[0022] Step 3: The first driving motor drives the first rotating gear to rotate. The driving threaded rod rotates through the meshing connection relationship between the first rotating gear and the second rotating gear. The limit sliding block drives the material pushing plate to slide left and right alternately along the driving threaded rod, pushing down the erected waste material blocks, waste material slices and waste material wires, and the cutting blades normally cut the waste material blocks, waste material slices and waste material wires;

[0023] Step 4: The cut waste material enters the inner crushing box body through the discharge port; the second driving motor works to drive the intermediate roller to rotate counterclockwise. The first inner crushing ring and the second inner crushing ring rotate within the first outer crushing ring and the second outer crushing ring. The waste material enters the crushing channel and is crushed;

[0024] Step 5: The crushed waste material is discharged through the first filter hole and the second filter hole after reaching the inner bottom end of the inner crushing box body. The waste material that does not meet the requirements of the filter aperture and the waste material that fails to be discharged in time enter the circulation cavity;

[0025] Step 6: The second driving motor operates to drive the third rotating gear to rotate counterclockwise. The fifth rotating gear rotates clockwise due to the meshing connection between the third rotating gear and the fourth rotating gear. The outer rotating tooth ring rotates clockwise due to the meshing connection with the fifth rotating gear, drives the arc-shaped pushing plate to rotate through the second connecting plate. The transition pushing plate cuts off the waste material stuck in the second filtering hole and rotates along the circulation cavity. The outer fixed vertical plate holds the rotating waste material at the lower end of the arc-shaped pushing plate until it rotates to the position of the blanking port. The circulated waste material reaches the upper end of the crushing unit again through the blanking port to participate in crushing.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] (1) In this invention, the crushing unit normally conducts crushing. After the crushed waste material reaches the inner bottom end of the crushing inner box body, it discharges through the first filtering hole and the second filtering hole. The waste material that does not meet the filtering aperture requirements and the waste material that fails to be discharged in time enter the circulation cavity. The arc-shaped pushing plate on the circulation rotating unit is driven to rotate. The outer fixed vertical plate holds the rotating waste material at the lower end of the arc-shaped pushing plate until it rotates to the position of the blanking port. The circulated waste material reaches the upper end of the crushing unit again through the blanking port to participate in crushing. Since the circulation process drives the waste material to rotate in a cycle, it does not occupy too much equipment space, and the time difference between the crushing process and the circulation process is short, solving the problem that the spiral feeding structure has a certain height, and there is no circulated waste material participating in crushing until some time after the crushing starts. After the crushing is basically completed, it is necessary to wait for the spiral feeding structure to complete the feeding of the remaining waste material, and the working efficiency needs to be improved.

[0028] (2) In this invention, the circulation rotating unit can push the waste material stuck in the filtering hole, and the transition pushing plate can cut off the waste material stuck in the second filtering hole and rotate along the circulation cavity, which can effectively avoid waste material blockage and ensure the continuity and stability of the crushing process.

[0029] (3) In this invention, a multi-stage crushing structure is adopted, including a cutting unit and a crushing unit, which can easily handle waste materials of various shapes and sizes, and the crushing efficiency is significantly improved. During the cutting process, under the driving action of the first driving motor, the limit sliding block drives the material pushing plate to slide left and right alternately along the driving threaded rod, pushing down the erected waste material blocks, waste material slices and waste material wires. The cutting blade normally cuts the waste material blocks, waste material slices and waste material wires, preventing the waste material from directly discharging along the cutting structure on the cutting unit and affecting the crushing effect.

[0030] (4) In this invention, the first outer crushing ring and the second outer crushing ring in the crushing unit are alternately arranged with the first inner crushing ring and the second inner crushing ring to form a crushing channel, ensuring that the waste material is fully crushed during the crushing process. And the positions of adjacent crushing channels are not in the same space, which can longitudinally pull the waste material and effectively reduce the particle size of the crushed waste material.

[0031] (5) In this invention, the second driving motor drives the first bevel gear to rotate. Through the meshing relationship between the first bevel gear and the second bevel gear, the intermediate roller is driven to rotate counterclockwise. Through the coaxial connection relationship between the intermediate roller and the first transmission wheel, the first transmission wheel is driven to rotate, enabling the cutting unit to perform the cutting operation; when the second driving motor operates, it drives the intermediate roller to rotate counterclockwise, enabling the crushing unit to perform the crushing operation; when the second driving motor operates, it drives the third rotating gear to rotate counterclockwise, and the fifth rotating gear rotates clockwise through the meshing connection relationship between the third rotating gear and the fourth rotating gear. The outer rotating gear ring rotates clockwise through the meshing connection relationship with the fifth rotating gear, enabling the circulating rotation unit to operate for waste recycling. The entire drive is realized by relying on the second driving motor as the driving main body and a series of linkage structures, making the cutting, crushing, and waste recycling processes more continuous and the device more integrated. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of the main perspective of a polyamide waste recycling and crushing device of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the lower perspective of a polyamide waste recycling and crushing device of the present invention;

[0034] Figure 3 It is a top view of a polyamide waste recycling and crushing device of the present invention;

[0035] Figure 4 It is a sectional view taken along the line A - A of a polyamide waste recycling and crushing device of the present invention;

[0036] Figure 5 It is a front view of a polyamide waste recycling and crushing device of the present invention;

[0037] Figure 6 It is a sectional view taken along the line B - B of a polyamide waste recycling and crushing device of the present invention;

[0038] Figure 7 It is a sectional view of the crushing housing of a polyamide waste recycling and crushing device of the present invention;

[0039] Figure 8 It is a schematic diagram of the structure of the crushing unit of a polyamide waste recycling and crushing device of the present invention;

[0040] Figure 9 It is a schematic diagram of the structure of the circulating rotation unit of a polyamide waste recycling and crushing device of the present invention;

[0041] Figure 10 It is a schematic diagram of the structure of the cutting unit of a polyamide waste recycling and crushing device of the present invention.

[0042] In the figure: 1. Crushing outer shell; 2. Crushing outer box body; 3. Crushing inner box body; 4. Side connection plate; 5. Upper cutting outer box body; 6. Feed pipe body; 7. Feed inlet; 8. Upper rectangular slot; 9. Feed inclined plate; 10. Cutting cavity; 11. Discharge port; 12. Discharge inclined plate; 13. Circulation cavity; 14. First filter hole; 15. Second filter hole; 16. First outer crushing ring; 17. Second outer crushing ring; 18. Upper fixed box body; 19. First driving motor; 20. First rotating gear; 21. Second rotating gear; 22. Driving threaded rod; 23. Limit sliding block; 24. Material pushing plate; 25. Second driving motor; 26. First bevel gear; 27. Second bevel gear; 28. Crushing unit; 29. Intermediate roller; 30. First inner crushing ring; 31. Second inner crushing ring; 32. Third rotating gear; 33. First transmission wheel; 34. Fourth rotating gear; 35. Circulation rotating unit; 36. Outer rotating ring; 37. First connecting plate; 38. Fifth rotating gear; 39. Outer rotating tooth ring; 40. Second connecting plate; 41. Arc-shaped pushing plate; 42. Transition pushing plate; 43. Outer fixed vertical plate; 44. Third filter hole; 45. Cutting unit; 46. First cutting roller; 47. Second cutting roller; 48. Second transmission wheel; 49. Transmission belt; 50. Sixth rotating gear; 51. Seventh rotating gear; 52. Cutting blade; 53. Crushing channel; 54. Support frame. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0044] Please refer to Figures 1-10 , an embodiment provided by the present invention: A polyamide waste recycling and crushing device, including a crushing outer shell 1, and support frames 54 are welded and fixed to the front and rear ends of the lower end of the crushing outer shell 1 for supporting the entire device.

[0045] (1) Basic structure, as shown in Figure 4 and Figure 6 :

[0046] The crushing outer shell 1 includes a crushing outer box body 2 and a crushing inner box body 3. The crushing inner box body 3 is located in the middle of the crushing outer box body 2, and the two are fixed through a side connection plate 4 to form a stable crushing structure. An external circulation cavity 13 is formed between the crushing outer box body 2 and the crushing inner box body 3 for accommodating the waste rotating in a cycle.

[0047] (2) Design of the circulation rotating unit, as shown in Figure 4 , Figure 6 and Figure 9 :

[0048] A circulating cavity 13 is provided with a circulating rotation unit 35, which includes an outer rotation ring 36. The outer rotation ring 36 is rotationally connected to the outside of a side connection plate 4 on one side. A first connection plate 37 is fixedly arranged in an array on the outside of the outer rotation ring 36 for connecting and fixing an arc-shaped pushing plate 41. The circulating rotation unit 35 further includes an outer rotation gear ring 39. A second connection plate 40 is fixedly arranged in an array on the outside of the outer rotation gear ring 39. The second connection plate 40 and the first connection plate 37 are fixedly arranged together on the outside in a front-back correspondence to fix the arc-shaped pushing plate 41. The outer surface of the arc-shaped pushing plate 41 fits the inner surface of the crushing outer box 2, and a transition pushing plate 42 is formed at one end along the rotation direction. The transition pushing plate 42 has a blade design. An outer fixed vertical plate 43 is formed at one end against the rotation direction. The height of the outer fixed vertical plate 43 is equal to the width of the circulating cavity 13 to ensure that the waste does not fall during the circulation process.

[0049] Second filter holes 15 and first filter holes 14 are respectively formed through the lower ends of the outer surfaces of the crushing outer box 2 and the crushing inner box 3. Third filter holes 44 with the same aperture size as the second filter holes 15 and the first filter holes 14 are formed in the arc-shaped pushing plate 41 and the transition pushing plate 42. Ring-shaped blades can be arranged on the inner walls of the third filter holes 44 to further cut the waste.

[0050] (3) The design of the crushing unit is as Figure 4 、 Figure 6 、 Figure 7 and Figure 8 shown:

[0051] A crushing unit 28 is arranged inside the crushing inner box 3, which includes an intermediate roller 29. A first outer crushing ring 16 and a second outer crushing ring 17 are alternately fixed on the outside of the intermediate roller 29. A third rotation gear 32 is arranged in the middle on one side of the crushing outer box 2 and is coaxially connected to the intermediate roller 29 and is driven to rotate by a driving motor. A fourth rotation gear 34 is installed along the upper end of the third rotation gear 32 on one side of the crushing outer box 2 and meshes with the third rotation gear 32 to achieve power transmission. A fifth rotation gear 38 is arranged on one side of the circulating cavity 13 and is coaxially connected to the fourth rotation gear 34. The fifth rotation gear 38 is meshed and connected with the outer rotation gear ring 39 to drive the circulating rotation unit.

[0052] First inner crushing rings 30 and second inner crushing rings 31 are alternately formed on the inner wall of the crushing inner box 3. A first outer crushing ring 16 and a second outer crushing ring 17 are alternately fixed on the outside of the intermediate roller 29. The first outer crushing ring 16 corresponds to the second inner crushing ring 31 in position, and the second outer crushing ring 17 corresponds to the first inner crushing ring 30 in position. Crushing tooth parts are formed on the inner surfaces of the first outer crushing ring 16 and the second outer crushing ring 17 and the outer surfaces of the first inner crushing ring 30 and the second inner crushing ring 31. A crushing channel 53 is formed between the first outer crushing ring 16 and the second outer crushing ring 17 and the first inner crushing ring 30 and the second inner crushing ring 31 for crushing the waste.

[0053] A second driving motor 25 is installed on the other side of the crushing outer box 2, and a first bevel gear 26 is installed on the output shaft end. A second bevel gear 27 is meshed and connected to one side of the first bevel gear 26. The second bevel gear 27 is coaxially connected to the intermediate roller 29 to realize the driving of the crushing unit 28.

[0054] (4) Design of the cutting unit, such as Figure 2 , Figure 4 , Figure 6 and Figure 10 As shown:

[0055] The crushing shell 1 also includes an upper cutting outer box 5, which is located at the upper end of the crushing outer box 2 and has a cutting chamber 10 formed therein. The upper cutting outer box 5 is connected to the crushing outer box 2 through a feed opening 11 to achieve waste transportation. A feed opening inclined plate 12 is formed inside the upper cutting outer box 5 along the front and rear ends of the upper end of the feed opening 11 to guide the waste into the cutting chamber 10.

[0056] The outer side of the third rotating gear 32 is coaxially connected with the first transmission wheel 33. A cutting unit 45 is provided inside the cutting chamber 10, including a first cutting roller 46 and a second cutting roller 47, which are installed at the front and rear ends inside the cutting chamber 10. A second transmission wheel 48 is installed along one side of the second cutting roller 47 on one side of the upper cutting outer box 5, which is coaxially connected to the second cutting roller 47 and is connected to the first transmission wheel 33 through a transmission belt 49 to achieve power transmission. A sixth rotating gear 50 is installed along the other side of the first cutting roller 46 on the other side of the upper cutting outer box 5, which is coaxially connected to the first cutting roller 46. A seventh rotating gear 51 is installed along the other side of the second cutting roller 47 on the other side of the upper cutting outer box 5, which is coaxially connected to the second cutting roller 47. Cutting blades 52 are fixed in an array on the outside of the first cutting roller 46 and the second cutting roller 47, which are installed alternately for cutting waste.

[0057] The upper end of the front end of the upper cutting outer box 5 is integrally connected with a feed pipe body 6, and a feed port 7 is formed inside, which is connected to the cutting chamber 10. The lower end of the feed pipe body 6 extends into the cutting chamber 10 to form a feed inclined plate 9, which is inclined toward the area between the first cutting roller 46 and the second cutting roller 47, and is used to guide the waste into the cutting unit 45.

[0058] (5) Design of waste posture adjustment unit, such as Figures 1-7 As shown:

[0059] The upper end of the upper cutting outer box 5 is welded and fixed with an upper fixed box 18, the internal limit sliding has a limit sliding block 23, and the lower end is fixed with a material pushing plate 24. The upper end surface of the upper cutting outer box 5 is provided with an upper rectangular slot 8 along the sliding track of the limit sliding block 23 for sliding of the material pushing plate 24.

[0060] On one side of the upper end of the upper fixed box body 18, a first driving motor 19 is installed, and a first rotating gear 20 is connected to the output shaft end. A second rotating gear 21 is meshed and connected to the lower end. In the middle of the upper fixed box body 18, a driving threaded rod 22 is installed, which is coaxially connected to the second rotating gear 21 and is threadedly connected to the limit sliding block 23 to drive the material pushing plate 24.

[0061] (6) Crushing method:

[0062] The waste material enters the feed pipe body 6 through the feed inlet 7 and is guided into the cutting cavity 10 along the feed inclined plate 9.

[0063] The second driving motor 25 drives the first bevel gear 26 to rotate, and drives the middle roller 29 to rotate counterclockwise through the meshing relationship between the first bevel gear 26 and the second bevel gear 27. The middle roller 29 drives the second cutting roller 47 to rotate counterclockwise through the transmission relationship of the first transmission wheel 33, the transmission belt 49 and the second transmission wheel 48. At the same time, the first cutting roller 46 rotates clockwise through the meshing connection relationship of the sixth rotating gear 50 and the seventh rotating gear 51. The cutting blades 52 on the first cutting roller 46 and the second cutting roller 47 alternately cut the waste material blocks, waste slices and waste filaments.

[0064] The first driving motor 19 drives the first rotating gear 20 to rotate, and drives the driving threaded rod 22 to rotate through the second rotating gear 21. The limit sliding block 23 slides left and right on the driving threaded rod 22, driving the material pushing plate 24 to push down the erected waste material blocks, waste slices and waste filaments to ensure that the cutting blades 52 can cut the waste material normally.

[0065] The cut waste material enters the inner crushing box body 3 through the discharge port 11. The second driving motor 25 continues to work to drive the middle roller 29 to rotate counterclockwise. The first inner crushing ring 30 and the second inner crushing ring 31 rotate in the first outer crushing ring 16 and the second outer crushing ring 17, and the waste material enters the crushing channel 53 and is crushed.

[0066] After the crushed waste material reaches the bottom end inside the inner crushing box body 3, it is discharged through the first filter hole 14 and the second filter hole 15. The waste material that does not meet the requirements of the filter aperture and the waste material that fails to be discharged in time enter the circulation cavity 13.

[0067] The second drive motor 25 operates to drive the third rotating gear 32 to rotate counterclockwise, and drives the outer rotating gear ring 39 to rotate clockwise through the meshing connection relationship between the fourth rotating gear 34 and the fifth rotating gear 38. The outer rotating gear ring 39 drives the arc-shaped pushing plate 41 to rotate through the second connecting plate 40, and the transition pushing plate 42 cuts off the waste material stuck in the second filtering hole 15 and rotates along the circulation cavity 13. The outer fixed vertical plate 43 supports the rotating waste material at the lower end of the arc-shaped pushing plate 41 until it rotates to the position of the blanking port 11. The recycled waste material reaches the upper end of the crushing unit 28 again through the blanking port 11 to participate in crushing, ensuring the continuity and stability of the crushing process.

[0068] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

Claims

1. A polyamide waste recycling and crushing device, including a crushing housing (1), and support frames (54) are fixedly welded to the front and rear ends of the lower end of the crushing housing (1), and it is characterized in that: The crushing housing (1) includes a crushing outer box body (2) and a crushing inner box body (3). The crushing inner box body (3) is centered inside the crushing outer box body (2). The two sides between the crushing outer box body (2) and the crushing inner box body (3) are fixed by side connection plates (4). A circulation cavity (13) is formed outside between the crushing outer box body (2) and the crushing inner box body (3). A circulation rotating unit (35) is arranged in the circulation cavity (13). The circulation rotating unit (35) includes an outer rotating ring (36). The outer rotating ring (36) is rotatably connected to the outside of one side connection plate (4). First connection plates (37) are fixedly arranged in an array on the outside of the outer rotating ring (36). The circulation rotating unit (35) further includes an outer rotating toothed ring (39). Second connection plates (40) are fixedly arranged in an array on the outside of the outer rotating toothed ring (39). Arc-shaped pushing plates (41) are jointly fixed to the outside of the front and rear corresponding second connection plates (40) and first connection plates (37). The outer surface of the arc-shaped pushing plate (41) fits the inner surface of the crushing outer box body (2). One end of the arc-shaped pushing plate (41) along the rotation direction forms a transition pushing plate (42). One end of the arc-shaped pushing plate (41) against the rotation direction forms an outer fixed vertical plate (43). The height of the outer fixed vertical plate (43) is equal to the width of the circulation cavity (13). A crushing unit (28) is arranged inside the crushing inner box body (3). The crushing unit (28) includes an intermediate roller (29). A third rotating gear (32) is arranged in the middle on one side of the crushing outer box body (2). The third rotating gear (32) is coaxially connected to the intermediate roller (29). A fourth rotating gear (34) is installed along the upper end of the third rotating gear (32) on one side of the crushing outer box body (2). The fourth rotating gear (34) meshes with the third rotating gear (32). A fifth rotating gear (38) is arranged on one side of the circulation cavity (13). The fifth rotating gear (38) is coaxially connected to the fourth rotating gear (34). The fifth rotating gear (38) is meshed and connected to the outer rotating toothed ring (39). Second filter holes (15) and first filter holes (14) are respectively formed by penetrating through the lower ends of the outer surfaces of the crushing outer box body (2) and the crushing inner box body (3). Third filter holes (44) with the same aperture size as the second filter holes (15) and the first filter holes (14) are formed in the arc-shaped pushing plates (41) and the transition pushing plates (42).

2. The polyamide waste recycling and crushing device according to claim 1, characterized in that: The inner wall of the crushing inner box (3) is alternately formed with a first inner crushing ring (30) and a second inner crushing ring (31); the outer side of the intermediate rotating roller (29) is alternately fixed with a first outer crushing ring (16) and a second outer crushing ring (17); the first outer crushing ring (16) and the second inner crushing ring (31) are located correspondingly; the second outer crushing ring (17) and the first inner crushing ring (30) are located correspondingly; the inner surfaces of the first outer crushing ring (16) and the second outer crushing ring (17) and the outer surfaces of the first inner crushing ring (30) and the second inner crushing ring (31) are both formed with crushing teeth; and a crushing channel (53) is formed between the first outer crushing ring (16) and the second outer crushing ring (17) and the first inner crushing ring (30) and the second inner crushing ring (31).

3. A polyamide waste recycling and crushing device according to claim 2, characterized in that: A second drive motor (25) is installed on the other side of the crushing outer box (2); a first bevel gear (26) is installed on the output shaft end of the second drive motor (25); a second bevel gear (27) is meshedly connected to one side of the first bevel gear (26); and the second bevel gear (27) is coaxially connected to the intermediate rotating roller (29).

4. The polyamide waste recycling and crushing device according to claim 3, characterized in that: The crushing shell (1) further comprises an upper cutting outer box (5), the upper cutting outer box (5) being located at the upper end of the crushing outer box (2), a cutting cavity (10) being formed inside the upper cutting outer box (5), the upper cutting outer box (5) being connected to the crushing outer box (2) via a feed opening (11), and a feed opening inclined plate (12) being formed inside the upper cutting outer box (5) along the front and rear ends of the upper end of the feed opening (11).

5. A polyamide waste recycling and crushing device according to claim 4, characterized in that: The outer side of the third rotating gear (32) is coaxially connected with a first transmission wheel (33); a cutting unit (45) is arranged inside the cutting chamber (10), and the cutting unit (45) comprises a first cutting roller (46) and a second cutting roller (47), the first cutting roller (46) and the second cutting roller (47) are installed at the front end and the rear end inside the cutting chamber (10); a second transmission wheel (48) is installed on one side of the upper cutting outer box body (5) along one side of the second cutting roller (47), the second transmission wheel (48) is coaxially connected with the second cutting roller (47), and the second transmission wheel (48) is connected to the first transmission wheel (33) through a transmission belt (49).

6. The polyamide waste recycling and crushing device according to claim 5, wherein: A sixth rotating gear (50) is installed on the other side of the upper cutting outer box body (5) along the other side of the first cutting roller (46), and the sixth rotating gear (50) is coaxially connected to the first cutting roller (46). A seventh rotating gear (51) is installed on the other side of the upper cutting outer box body (5) along the other side of the second cutting roller (47), and the seventh rotating gear (51) is coaxially connected to the second cutting roller (47). Cutting blades (52) are fixed in an array on the outside of the first cutting roller (46) and the second cutting roller (47), and the cutting blades (52) on the outside of the first cutting roller (46) and the cutting blades (52) on the outside of the second cutting roller (47) are installed alternately.

7. A polyamide waste recycling and crushing device according to claim 6, characterized in that: The upper end of the upper cutting outer box body (5) is fixedly welded with an upper fixed box body (18). A limiting sliding block (23) is limited and slidably arranged inside the upper fixed box body (18). A material pushing plate (24) is fixed to the lower end of the limiting sliding block (23). An upper rectangular slot (8) is formed in the upper end surface of the upper cutting outer box body (5) along the sliding track of the limiting sliding block (23).

8. A polyamide waste recycling and crushing device according to claim 7, characterized in that: One side of the upper end of the upper fixed box body (18) is provided with a first driving motor (19). The output shaft end of the first driving motor (19) is connected with a first rotating gear (20). A second rotating gear (21) is meshed and connected to the lower end of the first rotating gear (20). A driving threaded rod (22) is arranged in the middle inside the upper fixed box body (18). The driving threaded rod (22) is coaxially connected with the second rotating gear (21). The driving threaded rod (22) is in threaded connection with the limiting sliding block (23).

9. A polyamide waste recycling and crushing device according to claim 8, characterized in that: The upper end of the front end of the upper cutting outer box body (5) is integrally connected with a feed pipe body (6). A feed port (7) is formed inside the feed pipe body (6). The feed port (7) is communicated with a cutting cavity (10). The lower end of the feed pipe body (6) extends into the cutting cavity (10) to form a feed inclined plate (9). The feed inclined plate (9) inclines towards the area between the first cutting roller (46) and the second cutting roller (47).

10. A crushing method, implemented based on a polyamide waste recycling and crushing device as described in claim 9, characterized in that, It includes the following steps: Step 1: The waste material enters the feed pipe body (6) through the feed port (7) and is guided into the cutting cavity (10) along the feed inclined plate (9). Step 2: The second driving motor (25) drives the first bevel gear (26) to rotate. The middle roller (29) is driven to rotate counterclockwise through the meshing relationship between the first bevel gear (26) and the second bevel gear (27). The first driving wheel (33) is driven to rotate through the coaxial connection relationship between the middle roller (29) and the first driving wheel (33). The second cutting roller (47) rotates counterclockwise through the transmission relationship of the second driving wheel (48), the transmission belt (49) and the first driving wheel (33). The first cutting roller (46) rotates clockwise through the meshing connection relationship between the sixth rotating gear (50) and the seventh rotating gear (51). The cutting blades (52) on the first cutting roller (46) and the second cutting roller (47) cut the waste material blocks, waste material slices and waste material filaments. Step 3: The first driving motor (19) drives the first rotating gear (20) to rotate. The driving threaded rod (22) rotates through the meshing connection relationship between the first rotating gear (20) and the second rotating gear (21). The limiting sliding block (23) drives the material pushing plate (24) to slide left and right alternately along the driving threaded rod (22), pushing down the erected waste material blocks, waste material slices and waste material filaments. The cutting blades (52) normally cut the waste material blocks, waste material slices and waste material filaments. Step 4: The cut waste enters the inner crushing box body (3) through the blanking port (11); the second driving motor (25) operates to drive the intermediate roller (29) to rotate counterclockwise, and the first inner crushing ring (30) and the second inner crushing ring (31) rotate within the first outer crushing ring (16) and the second outer crushing ring (17), and the waste enters the crushing channel (53) and is crushed. Step 5: The crushed waste reaches the inner bottom end of the inner crushing box body (3) and then discharges through the first filter hole (14) and the second filter hole (15), and the waste that does not meet the requirements of the filter aperture and the waste that fails to be discharged in time enter the circulation cavity (13). Step 6: The second driving motor (25) operates to drive the third rotating gear (32) to rotate counterclockwise, and the fifth rotating gear (38) rotates clockwise through the meshing connection relationship between the third rotating gear (32) and the fourth rotating gear (34), and the outer rotating tooth ring (39) rotates clockwise through the meshing connection relationship with the fifth rotating gear (38), drives the arc-shaped pushing plate (41) to rotate through the second connecting plate (40), the transition pushing plate (42) cuts off the waste stuck in the second filter hole (15) and rotates along the circulation cavity (13), and the outer fixed vertical plate (43) supports the rotating waste at the lower end of the arc-shaped pushing plate (41) until it rotates to the position of the blanking port (11), and the circulating waste reaches the upper end of the crushing unit (28) again through the blanking port (11) to participate in crushing.

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