Plastic waste recycling device

Abstract

The invention relates to the technical field of plastic waste treatment, and discloses a plastic waste recovery treatment device which comprises a support and a crushing box installed on the support and further comprises a driving motor, a first crushing roller and a second crushing roller are rotationally connected into the crushing box, and the driving motor drives the crushing box to rotate. A linkage mechanism is arranged between the driving motor and the first crushing roller and between the driving motor and the second crushing roller and is used for driving the first crushing roller and the second crushing roller to rotate; the magnetic separation mechanism is arranged between the first crushing roller and the second crushing roller and is used for removing metal parts in the materials; the filter plate is fixedly connected to the interior of the smashing box, and a material returning mechanism is arranged on the side, close to the filter plate, of the support and used for conducting secondary smashing on large-size materials; the dehydration mechanism is arranged in the crushing box and is used for removing water in the crushed materials; the operation process of plastic waste recovery treatment can be simplified, the cost of plastic waste recovery treatment can be reduced, and meanwhile the cleaning effect of plastic waste is improved.

Description

Technical Field

[0001] This invention relates to the field of plastic waste treatment technology, specifically to a plastic waste recycling and treatment device. Background Technology

[0002] Plastic waste typically consists of discarded or unused plastic products or scraps from the production process. Examples include post-consumer waste plastics such as beverage bottles, packaging bags, appliance casings, and foam plastics; industrial waste plastics such as injection molding scraps, substandard plastic products, and pipe remnants; and agricultural waste plastics such as mulch film, pesticide bottles, and seedling trays. To reduce environmental pollution from waste plastics and to conserve resources and energy, plastic waste is usually recycled. However, it requires processing before recycling.

[0003] Existing plastic waste recycling and processing mainly includes multiple stages such as sorting, cleaning, crushing, and granulation. Sorting: It is necessary to classify according to different materials and colors; Cleaning: Remove surface stains and thoroughly clean after crushing; Crushing: Crush plastic of different shapes into uniform granules or flakes; Granulation: Melt and plasticize through an extruder, and then cut into uniform granules; Finally, the granulated plastic can be used for secondary processing of products to improve the utilization rate of plastic waste.

[0004] Currently, plastic waste typically requires pretreatment before crushing. For example, color sorters and sealed separators are used to separate plastics of different materials. However, for plastic waste containing metal, crushers (such as jaw crushers, impact crushers, and rotary crushers) are generally required to crush the waste. The crushed waste is then transported to magnetic separators for magnetic separation. This process is not only cumbersome but also increases the cost of plastic waste recycling. In addition, pre-washing and drying of plastic waste require additional equipment, resulting in high water consumption and poor stain removal. Summary of the Invention

[0005] This invention provides a plastic waste recycling and processing device. Through a linkage mechanism, when the drive motor is working, it drives the first and second crushing rollers to rotate synchronously. First, the mixture of metal and plastic is crushed, and then the metal is removed by a magnetic separation mechanism. The device also drives a return material mechanism to crush the plastic that was crushed in the first crushing. At the same time, the plastic is washed and dried during the crushing process. This not only prevents the plastic from sticking to the crushing rollers when the metal and plastic are mixed and crushed, but also improves the cleaning effect of the plastic. In addition, the multi-functional integration of plastic waste recycling and processing greatly simplifies the operation process of plastic waste recycling and processing and reduces the cost of plastic waste recycling and processing.

[0006] This invention provides the following technical solution: A plastic waste recycling and processing device includes a support frame and a crushing box mounted on the support frame. It further includes: a drive motor fixedly connected to the support frame; a first crushing roller and a second crushing roller rotatably connected inside the crushing box; a linkage mechanism between the drive motor and the first and second crushing rollers for driving their rotation; a magnetic separation mechanism disposed between the first and second crushing rollers for removing metal parts from the material; a filter plate fixedly connected inside the crushing box; a return material mechanism disposed on the side of the support frame near the filter plate for secondary crushing of large-sized materials; and a dewatering mechanism disposed inside the crushing box for removing water from the crushed material.

[0007] As a preferred embodiment of the present invention, the linkage mechanism includes a first drive wheel set fixedly connected to one of the second crushing rollers and the output end of the drive motor, a first belt sleeved between the two sets of the first drive wheel sets, and a linkage gear meshing with each other fixedly connected to the shaft ends of the first crushing roller and the second crushing roller, wherein a second drive wheel set is fixedly connected to the shaft ends of one set of the first crushing roller and the second crushing roller, and a second belt sleeved between the second drive wheel sets.

[0008] As a preferred embodiment of the present invention, it further includes a reciprocating screw rotatably connected to the bracket, wherein a bevel gear set meshing with the reciprocating screw and one of the first crushing roller shaft ends is provided, a slider is provided on the reciprocating screw, and a double-chamber cylinder is fixedly connected between the slider and the bracket, wherein a water tank is fixedly connected to the bracket, and water nozzles are symmetrically fixedly connected to the crushing box, wherein the outlet end of one of the double-chamber cylinders is connected to the water tank through a pipe, and the water tank is connected to the water nozzles through a pipe.

[0009] In a preferred embodiment of the present invention, the magnetic separation mechanism includes an air nozzle fixedly connected inside a grinding chamber. A first baffle is slidably connected to the lower part of the grinding chamber near the air nozzle. A first spring is fixedly connected between the first baffle and the grinding chamber. A receiving groove is formed inside the grinding chamber on the side away from the first baffle. A permanent magnet plate is fixedly connected inside the receiving groove. A compression rod is fixedly connected to the permanent magnet plate. A first electromagnetic plate, slidably connected to the receiving groove, is fixedly connected to the end of the compression rod. A pressure sensor is fixedly connected to the side of the first electromagnetic plate away from the compression rod. The pressure sensor is located away from the first electromagnetic plate. A second electromagnetic plate is fixedly connected to one side. A second spring, sleeved on the compression rod, is fixedly connected between the first electromagnetic plate and the permanent magnet plate. A slag discharge port is opened on the side of the crushing box near the bottom of the receiving tank. The pressure sensor is electrically connected to the first electromagnetic plate. A control switch is installed inside the compression rod and is electrically connected to the second electromagnetic plate. When the compression rod is at its minimum size, the control switch is triggered. A groove matching the first baffle is opened inside the crushing box. The compression rod and the groove are connected by a pipe. The air nozzle is connected to the outlet end of another set of double-chamber cylinders by a pipe.

[0010] As a preferred embodiment of the present invention, the water nozzle is located above the first crushing roller, the air nozzle, the first baffle and the second electromagnetic plate are located between the first crushing roller and the second crushing roller, the filter plate is inclined and located below the second crushing roller, and a water blocking block is provided at the bottom of the filter plate.

[0011] As a preferred embodiment of the present invention, the material return mechanism includes a material return cylinder fixedly connected to the side of the support near the bottom end of the filter plate. A rotating shaft is rotatably connected between the support and the material return cylinder. A material return spiral blade that fits against the material return cylinder is fixedly connected to the rotating shaft. The material return cylinder is provided with a material return channel that communicates with the crushing box. One set of the material return channels is located above the bottom end of the filter plate, and the other set of the material return channels is located above the second crushing roller.

[0012] As a preferred embodiment of the present invention, it further includes a third drive wheel assembly fixedly connected to the rotating shaft and the reciprocating lead screw, a guide wheel is provided on the side of the crushing box near the third drive wheel assembly, and a third belt is sleeved between the third drive wheel assembly and the guide wheel.

[0013] As a preferred embodiment of the present invention, the crushing box is provided with a feeding channel located below the filter plate. The feeding channel is provided with symmetrical sealing grooves. A connecting cylinder is fixedly connected inside the sealing groove. A sealing plate is fixedly connected to one side of the connecting cylinder that is close to the other. The side wall of the feeding channel is inclined. The sealing groove and the compression rod are connected by a pipe.

[0014] As a preferred embodiment of the present invention, the dewatering mechanism includes a connecting shaft rotatably connected to the bottom of the crushing chamber. A fourth drive wheel assembly is fixedly connected to both the connecting shaft and the rotating shaft. A fourth belt is sleeved between the fourth drive wheel assemblies. A centrifuge cylinder is fixedly connected to the top of the connecting shaft. A water-retaining ring matching the side wall of the centrifuge cylinder is fixedly connected to the bottom of the crushing chamber. A drain outlet is connected to the side of the side wall of the crushing chamber near the water-retaining ring. A discharge assembly is provided between the centrifuge cylinder and the bottom of the crushing chamber.

[0015] As a preferred embodiment of the present invention, the discharge assembly includes a discharge hole at the bottom of the centrifuge cylinder, a connecting groove on the side of the centrifuge cylinder near the discharge hole, a third spring fixedly connected inside the connecting groove, a second baffle matching the connecting groove fixedly connected to the end of the third spring, a discharge port at the bottom of the crushing box, and a guide plate matching the discharge port fixedly connected to the connecting shaft. The connecting groove is connected to the connecting cylinder via a slip ring and a pipe. The slip ring is located between the top of the centrifuge cylinder and the discharge channel, and the pipe passes through the discharge channel to the slip ring and then through the side wall of the centrifuge cylinder into the connecting groove.

[0016] Compared with the prior art, the present invention provides a plastic waste recycling and processing device, which has the following beneficial effects: 1. In this plastic waste recycling and processing device, the linkage mechanism can drive the first crushing roller and the second crushing roller to crush the plastic and metal mixture and crush the plastic separately. At the same time, the magnetic separation mechanism collects the metal after the initial crushing. During the mixed crushing, the first crushing roller is cooled by water spray head. On the one hand, this can prevent the plastic from melting and sticking to the first crushing roller at high temperature. On the other hand, it can reduce the waste of water resources.

[0017] 2. In this plastic waste recycling and processing device, the return material mechanism can perform secondary crushing of large-sized plastic waste after it has been crushed by the second crushing roller, so as to facilitate the subsequent processing of plastic waste. At the same time as the return material is processed, the plastic waste is spun dry, which greatly simplifies the operation process of plastic waste recycling and processing, improves the automation level of plastic waste recycling and processing, reduces the cost of plastic waste recycling and processing, and is conducive to the batch recycling and processing of plastic waste.

[0018] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention can simplify the operation process of plastic waste recycling and treatment, reduce the cost of plastic waste recycling and treatment, and improve the cleaning effect of plastic waste. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ; Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the crushing box and the return cylinder of the present invention; Figure 4 This is a schematic cross-sectional view of the crushing box and the return cylinder of the present invention; Figure 5 This is a partial cross-sectional structural diagram of the crushing box and the feeding channel of the present invention; Figure 6 For the present invention Figure 2 A schematic diagram of the structure of part A; Figure 7 For the present invention Figure 4 A structural diagram of section B; Figure 8 For the present invention Figure 4 A structural diagram of part C.

[0021] In the diagram: 1. Support frame; 2. Crushing box; 3. Drive motor; 4. First crushing roller; 5. Second crushing roller; 6. First drive wheel assembly; 7. First belt; 8. Linkage gear; 9. Second drive wheel assembly; 10. Second belt; 11. Water nozzle; 12. Air nozzle; 13. First baffle; 14. First spring; 15. Collection trough; 16. Permanent magnet plate; 17. Compression rod; 18. First electromagnetic plate; 19. Pressure sensor; 20. Second electromagnetic plate; 21. Second spring; 22. Slag discharge port; 23. Return cylinder; 24. Rotating shaft; 25. Return screw. 26. Rotary vane; 27. Return channel; 28. Reciprocating screw; 29. ​​Third drive wheel assembly; 30. Guide wheel; 31. Third belt; 32. Bevel gear assembly; 33. Slider; 34. Double-chamber cylinder; 35. Filter plate; 36. Discharge channel; 37. Sealing groove; 38. Connecting cylinder; 39. Sealing plate; 40. Connecting shaft; 41. Fourth drive wheel assembly; 42. Fourth belt; 43. Centrifuge cylinder; 44. Discharge hole; 45. Connecting groove; 46. Third spring; 47. Second baffle; 48. Discharge port; 49. Guide plate; 50. Water baffle ring; 51. Water tank. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Reference Figures 1-8 A plastic waste recycling and processing device includes a support frame 1 and a crushing box 2 mounted on the support frame 1. It also includes: a drive motor 3 fixedly connected to the support frame 1; a first crushing roller 4 and a second crushing roller 5 rotatably connected inside the crushing box 2; a linkage mechanism between the drive motor 3 and the first and second crushing rollers 4 and 5 for driving the first and second crushing rollers 4 and 5 to rotate; a magnetic separation mechanism located between the first and second crushing rollers 4 and 5 for removing metal parts from the material; a filter plate 34 fixedly connected inside the crushing box 2; a return material mechanism located on the side of the support frame 1 near the filter plate 34 for secondary crushing of large-sized materials; and a dewatering mechanism located inside the crushing box 2 for removing water from the crushed material.

[0024] In this embodiment, when processing plastic waste, plastic waste containing metal is added to the crushing box 2, and the drive motor 3 is started. The first crushing roller 4 and the second crushing roller 5 are driven to rotate through the linkage mechanism. The first crushing roller 4 crushes the mixture of metal and plastic waste. The crushed metal is then removed by the magnetic separation mechanism. Furthermore, during the crushing process, water is continuously added to the crushing box 2, and the plastic waste after the first crushing is blown towards the magnetic separation mechanism to ensure thorough removal of metal. Subsequently, the plastic waste is crushed by the second crushing roller 5. The larger pieces of waste after crushing are crushed again by the return material mechanism. The crushed waste falls into the dewatering mechanism. After dewatering, the waste and wastewater are collected separately to complete the recycling of plastic waste.

[0025] Reference Figure 1 The linkage mechanism includes a first drive wheel group 6 fixedly connected to one of the second crushing rollers 5 and the output end of the drive motor 3. A first belt 7 is sleeved between the two first drive wheel groups 6. The shaft ends of the first crushing roller 4 and the second crushing roller 5 are fixedly connected to meshing linkage gears 8. A second drive wheel group 9 is fixedly connected to the shaft ends of one of the first crushing rollers 4 and the second crushing roller 5. A second belt 10 is sleeved between the second drive wheel groups 9.

[0026] In this embodiment, when crushing plastic waste, the drive motor 3 drives the second crushing roller 5 to rotate through the first drive wheel set 6 and the first belt 7, and then drives the first crushing roller 4 to rotate through the second drive wheel set 9 and the second belt 10. In addition, under the action of the linkage gear 8, the first crushing roller 4 and the second crushing roller 5 rotate relative to each other. It should be noted that different crushing speeds are required for metal-plastic mixtures and plastic waste. Usually, the crushing speed of the mixture is less than that of the plastic waste, which can be controlled by adjusting the diameter ratio of the second drive wheel set 9.

[0027] Reference Figure 2 and Figure 6 It also includes a reciprocating screw 27 rotatably connected to the bracket 1. The reciprocating screw 27 is provided with a bevel gear set 31 meshing with the shaft end of one of the first crushing rollers 4. A slider 32 is provided on the reciprocating screw 27. A double-chamber cylinder 33 is fixedly connected between the slider 32 and the bracket 1. A water tank 50 is fixedly connected to the bracket 1. Water nozzles 11 are symmetrically fixedly connected to the crushing box 2. The outlet end of one of the double-chamber cylinders 33 is connected to the water tank 50 through a pipe. The water tank 50 is connected to the water nozzle 11 through a pipe.

[0028] In this embodiment, when the first crushing roller 4 rotates, it drives the reciprocating screw 27 to rotate through the bevel gear set 31. The slider 32 is equipped with balls that match the reciprocating screw 27, which intermittently compress the dual-chamber cylinder 33. The dual-chamber cylinder 33 includes two sets of compression chambers. That is, no matter whether the size of the dual-chamber cylinder 33 increases or decreases, at least one set of compression chambers is in a compressed state. The gas compressed by one set of dual-chamber cylinders 33 is delivered to the water tank 50, which increases the pressure in the water tank 50, thereby delivering the water in the water tank 50 to the water nozzle 11. This not only achieves pre-cleaning of plastic waste, but also cools the first crushing roller 4, preventing plastic waste from sticking to the first crushing roller 4 due to high temperature, thereby ensuring the stability of the metal-plastic mixture crushing.

[0029] Reference Figure 4 and Figure 7The magnetic separation mechanism includes an air nozzle 12 fixedly connected inside the crushing chamber 2. A first baffle 13 is slidably connected to the lower part of the crushing chamber 2 near the air nozzle 12. A first spring 14 is fixedly connected between the first baffle 13 and the crushing chamber 2. A receiving groove 15 is provided inside the crushing chamber 2 on the side away from the first baffle 13. A permanent magnet plate 16 is fixedly connected inside the receiving groove 15. A compression rod 17 is fixedly connected to the permanent magnet plate 16. A first electromagnetic plate 18, which is slidably connected to the end of the compression rod 17, is fixedly connected to the end of the compression rod 17. A pressure sensor 19 is fixedly connected to the side of the first electromagnetic plate 18 away from the compression rod 17. A pressure sensor 19 is fixedly connected to the side of the pressure sensor 19 away from the first electromagnetic plate 18. A second electromagnetic plate 20 is fixedly connected to the first electromagnetic plate 18 and the permanent magnet plate 16. A second spring 21 is fixedly connected to the compression rod 17. A slag discharge port 22 is opened on the side of the crushing box 2 near the bottom of the receiving trough 15. The pressure sensor 19 is electrically connected to the first electromagnetic plate 18. A control switch is set inside the compression rod 17 and is electrically connected to the second electromagnetic plate 20. When the compression rod 17 is at its minimum size, the control switch is triggered. A groove matching the first baffle 13 is opened inside the crushing box 2. The compression rod 17 and the groove are connected by a pipe. The air nozzle 12 is connected to the outlet end of another set of double-chamber cylinders 33 by a pipe.

[0030] In this embodiment, the gas compressed by another set of dual-chamber cylinders 33 is blown out through the air nozzle 12, thereby blowing the pulverized mixture to the second electromagnetic plate 20. Subsequently, the metal in the mixture will be adsorbed on the second electromagnetic plate 20. When the amount of metal on the second electromagnetic plate 20 reaches a certain level, the pressure sensor 19 will control the first electromagnetic plate 18 to be de-energized. Then, the first electromagnetic plate 18 and the second electromagnetic plate 20 will move into the receiving groove 15 under the action of the second spring 21. When the compression rod 17 is at its minimum size, the second electromagnetic plate 20 will be de-energized, and the metal on the second electromagnetic plate 20 will fall into the slag discharge port 22, thereby removing the metal from the mixture. At the same time, the compression rod 17 will drive the first baffle 13 to move towards the second electromagnetic plate 20 to prevent the metal from falling with the plastic waste when the second electromagnetic plate 20 is de-energized, so as to ensure more thorough metal removal.

[0031] Reference Figure 4 The water nozzle 11 is located above the first crushing roller 4, the air nozzle 12, the first baffle 13 and the second electromagnetic plate 20 are located between the first crushing roller 4 and the second crushing roller 5, the filter plate 34 is inclined and located below the second crushing roller 5, and a water blocking block is provided at the bottom of the filter plate 34.

[0032] In this embodiment, by cleaning the plastic waste during the crushing process, not only can the number of steps be reduced and efficiency improved, but the dust generated during plastic crushing can also be suppressed, improving the working environment. In addition, the contact area between water and plastic waste increases after crushing, making it easier to wash away stains. Compared with cleaning before crushing, it saves more water. Furthermore, after being crushed by the second crushing roller 5, the larger plastic waste will roll down along the filter plate 34, while water and smaller plastic waste will continue to fall. The water blocking block can reduce the water content in the large-sized plastic powder.

[0033] Reference Figure 3 , Figure 4 and Figure 6 The material return mechanism includes a material return cylinder 23 fixedly connected to the support 1 near the bottom of the filter plate 34. A rotating shaft 24 is rotatably connected between the support 1 and the material return cylinder 23. A material return spiral blade 25 that fits against the material return cylinder 23 is fixedly connected to the rotating shaft 24. A material return channel 26 connected to the crushing box 2 is provided on the material return cylinder 23. One set of material return channels 26 is located above the bottom of the filter plate 34, and another set of material return channels 26 is located above the second crushing roller 5. The mechanism also includes a third drive wheel set 28 fixedly connected to the rotating shaft 24 and the reciprocating screw 27. A guide wheel 29 is provided on the side of the crushing box 2 near the third drive wheel set 28. A third belt 30 is sleeved between the third drive wheel set 28 and the guide wheel 29.

[0034] In this embodiment, when the reciprocating screw 27 rotates, it drives the rotating shaft 24 to rotate through the third drive wheel set 28, guide wheel 29 and third belt 30, thereby driving the return spiral blade 25 to rotate. At this time, the large-sized plastic waste filtered by the filter plate 34 will enter the return cylinder 23 through the return channel 26, thereby conveying the waste upward and conveying it to the top of the second crushing roller 5 through another set of return channels 26 for secondary crushing of the plastic waste, so as to facilitate the subsequent processing of the plastic waste.

[0035] Reference Figure 4 and Figure 5 The crushing box 2 is provided with a feeding channel 35, which is located below the filter plate 34. The feeding channel 35 is symmetrically provided with sealing grooves 36. A connecting cylinder 37 is fixedly connected inside the sealing groove 36. A sealing plate 38 is fixedly connected to the side of the connecting cylinder 37 that is close to each other. The side wall of the feeding channel 35 is inclined. The sealing groove 36 is connected to the compression rod 17 through a pipe.

[0036] In this embodiment, when the first baffle 13 is in the closed state, some of the gas in the compression rod 17 will be transported to the sealing groove 36, causing the sealing plate 38 to extend outward from the sealing groove 36 to block the plastic waste, that is, the plastic waste will not fall into the centrifuge drum 42 after subsequent crushing.

[0037] Reference Figure 4 and Figure 8 The dewatering mechanism includes a connecting shaft 39 rotatably connected to the bottom of the crushing chamber 2. A fourth drive wheel set 40 is fixedly connected to both the connecting shaft 39 and the rotating shaft 24. A fourth belt 41 is sleeved between the fourth drive wheel sets 40. A centrifuge cylinder 42 is fixedly connected to the top of the connecting shaft 39. A water-retaining ring 49 matching the side wall of the centrifuge cylinder 42 is fixedly connected to the bottom of the crushing chamber 2. A drain outlet is connected to the side of the side wall of the crushing chamber 2 near the water-retaining ring 49. A discharge assembly is provided between the centrifuge cylinder 42 and the bottom of the crushing chamber 2. The discharge assembly includes a discharge hole 43 opened at the bottom of the centrifuge cylinder 42. A connecting groove 44 is provided on the side near the discharge hole 43. A third spring 45 is fixedly connected inside the connecting groove 44. A second baffle 46 matching the connecting groove 44 is fixedly connected to the end of the third spring 45. A discharge port 47 is provided at the bottom of the crushing box 2. A guide plate 48 matching the discharge port 47 is fixedly connected to the connecting shaft 39. The connecting groove 44 is connected to the connecting cylinder 37 through a slip ring and a pipe. The slip ring is located between the top of the centrifuge cylinder 42 and the discharge channel 35. The pipe passes through the discharge channel 35 to the slip ring and then through the side wall of the centrifuge cylinder 42 into the connecting groove 44.

[0038] In this embodiment, when the rotating shaft 24 rotates, it drives the connecting shaft 39 to rotate through the fourth drive wheel group 40 and the fourth belt 41. That is, the water that falls into the centrifuge drum 42 will flow outward along the side wall under the centrifugal force of the centrifuge drum 42. Under the action of the water baffle ring 49, it will eventually be discharged through the drain. When the sealing plate 38 is in the closed state, the connecting cylinder 37 is in the extended state, thereby extracting the gas in the connecting groove 44, so that the second baffle 46 is separated from the discharge hole 43. Then the crushed plastic waste falls to the bottom of the crushing box 2 and is finally discharged through the discharge port 47 under the action of the guide plate 48.

[0039] In this invention, when processing plastic waste, the plastic waste containing metal is added to the crushing box 2. At the same time, the drive motor 3 is started, and the second crushing roller 5 is driven to rotate through the first drive wheel group 6 and the first belt 7. Then, the first crushing roller 4 is driven to rotate through the second drive wheel group 9 and the second belt 10. In addition, under the action of the linkage gear 8, the first crushing roller 4 and the second crushing roller 5 rotate relative to each other, realizing the crushing of the metal-plastic mixture and the plastic waste. At the same time, the reciprocating screw 27 is driven to rotate through the bevel gear group 31, intermittently compressing the double-chamber cylinder 33. The gas compressed by one of the double-chamber cylinders 33 is delivered to the water tank 50, which increases the pressure in the water tank 50, thereby delivering the water in the water tank 50 to the water nozzle 11. This not only realizes the pre-cleaning of the plastic waste, but also cools down the first crushing roller 4, preventing the plastic waste from sticking to the first crushing roller 4 due to high temperature, thus ensuring the stability of the crushing of the metal-plastic mixture. The gas compressed by another set of dual-chamber cylinders 33 is blown out through the air nozzle 12, thereby blowing the crushed mixture to the second electromagnetic plate 20. The metal during the falling process will be adsorbed on the second electromagnetic plate 20. When the amount of metal on the second electromagnetic plate 20 reaches a certain level, the pressure sensor 19 will control the first electromagnetic plate 18 to be de-energized. Then, the first electromagnetic plate 18 and the second electromagnetic plate 20 will move into the collection groove 15 under the action of the second spring 21. When the compression rod 17 is at its minimum size, the second electromagnetic plate 20 will be de-energized, and the metal on the second electromagnetic plate 20 will fall into the slag discharge port 22. At the same time, the compression rod 17 will drive the first baffle 13 to move to one side of the second electromagnetic plate 20 to prevent the metal from falling with the plastic waste when the second electromagnetic plate 20 is de-energized, so as to ensure that the metal is removed more thoroughly. After being crushed by the second crushing roller 5, the plastic waste first falls onto the filter plate 34. Larger pieces of plastic waste roll down the filter plate 34, while water and smaller pieces continue to fall. In addition, when the reciprocating screw 27 rotates, it drives the rotating shaft 24 to rotate through the third drive wheel set 28, guide wheel 29 and third belt 30, thereby driving the return spiral blade 25 to rotate. At this time, the large pieces of plastic waste filtered by the filter plate 34 enter the return cylinder 23 through the return channel 26, thereby conveying the waste upward and through another set of return channels 26 to the top of the second crushing roller 5 for secondary crushing of the plastic waste, so as to facilitate the subsequent processing of the plastic waste. After thorough crushing, the plastic waste falls into the centrifuge drum 42. Under the action of the fourth drive wheel set 40 and the fourth belt 41, the centrifuge drum 42 rotates, separating the water in the plastic waste and discharging it through the drain outlet. When collecting metal, some of the gas in the compression rod 17 is transported to the sealing groove 36, causing the sealing plate 38 to extend outward from the sealing groove 36 to block the plastic waste. The connecting cylinder 37 is in the extended state, thereby extracting the gas in the connecting groove 44, causing the second baffle 46 to disengage from the discharge hole 43. Subsequently, the crushed plastic waste falls to the bottom of the crushing box 2 and is finally discharged through the discharge port 47 under the action of the guide plate 48, thus realizing the recycling of plastic waste. This not only simplifies the operation process of plastic waste recycling, but also reduces the cost of plastic waste recycling, and the equipment has a higher degree of automation.

[0040] Components not described in detail in this article are existing technologies.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plastic waste recycling device, comprising a support (1) and a crushing box (2) mounted on the support (1), characterized in that, Also include: The drive motor (3) is fixedly connected to the support (1), the inside of the crushing box (2) is rotatably connected with the first crushing roller (4) and the second crushing roller (5), the drive motor (3) is provided with a linkage mechanism between the first crushing roller (4) and the second crushing roller (5), for driving the first crushing roller (4) and the second crushing roller (5) to rotate; Magnetic separation mechanism, set between the first crushing roller (4) and the second crushing roller (5), for removing metal parts in the material; Filter plate (34), fixedly connected to the inside of the crushing box (2), the support (1) is provided with a return mechanism on the side close to the filter plate (34), for secondary crushing of large size material; Dehydration mechanism, set in the inside of the crushing box (2), for removing water in the material after crushing.

2. The plastic waste recycling device according to claim 1, wherein The linkage mechanism includes a first drive wheel group (6) fixedly connected to one of the second crushing roller (5) and the output end of the drive motor (3), a first belt (7) is sleeved between the two first drive wheel groups (6), the shaft end of the first crushing roller (4) and the second crushing roller (5) is fixedly connected with the linkage gear (8) meshing with each other, one of the shaft end of the first crushing roller (4) and the second crushing roller (5) is fixedly connected with the second drive wheel group (9), and the second drive wheel group (9) is sleeved with the second belt (10).

3. The plastic waste recycling device according to claim 1, wherein Also include reciprocating screw (27) rotatably connected to the support (1), the reciprocating screw (27), the reciprocating screw (27) and one of the shaft end of the first crushing roller (4) are provided with the bevel gear set (31) meshing with each other, the reciprocating screw (27) is provided with a sliding block (32), the sliding block (32) and the support (1) are fixedly connected with a double cavity air cylinder (33), Wherein, the support (1) is fixedly connected with a water tank (50), the crushing box (2) is fixedly connected with a water spray head (11) in symmetry, one end of the double cavity air cylinder (33) is connected with the water tank (50) through pipeline, and the water tank (50) and the water spray head (11) are connected through pipeline.

4. The plastic waste recycling device according to claim 3, wherein The magnetic separation mechanism includes a gas nozzle (12) fixedly connected inside the crushing box (2), a first baffle (13) slidingly connected below the gas nozzle (12) near the crushing box (2), a first spring (14) fixedly connected between the first baffle (13) and the crushing box (2), a receiving groove (15) formed on one side of the crushing box (2) away from the first baffle (13), a permanent magnet plate (16) fixedly connected inside the receiving groove (15), a compression rod (17) fixedly connected to the permanent magnet plate (16), a first electromagnetic plate (18) slidingly connected to the end of the compression rod (17), a pressure sensor (19) fixedly connected to one side of the first electromagnetic plate (18) away from the compression rod (17), a second electromagnetic plate (20) fixedly connected to one side of the pressure sensor (19) away from the first electromagnetic plate (18), a second spring (21) fixedly connected between the first electromagnetic plate (18) and the permanent magnet plate (16) and sleeved on the compression rod (17), and a slag discharge port (22) formed on one side of the crushing box (2) near the bottom of the receiving groove (15), wherein the pressure sensor (19) and the first electromagnetic plate (18) are electrically connected, the control switch is arranged inside the compression rod (17), the control switch and the second electromagnetic plate (20) are electrically connected, the control switch is triggered when the compression rod (17) is at the minimum size, the crushing box (2) is provided with a groove matched with the first baffle (13) in the inside, the compression rod (17) and the groove are connected through a pipeline, and the gas nozzle (12) and the outlet end of the other group of double-cavity air cylinders (33) are connected through a pipeline.

5. The plastic waste recycling device as claimed in claim 4, wherein, The water nozzle (11) is located above the first crushing roller (4), the gas nozzle (12), the first baffle (13) and the second electromagnetic plate (20) are located between the first crushing roller (4) and the second crushing roller (5), the filter plate (34) is arranged obliquely and located below the second crushing roller (5), and the bottom end above the filter plate (34) is provided with a water blocking block.

6. The plastic waste recycling device according to claim 5, wherein The return mechanism includes a return cylinder (23) fixedly connected to the bracket (1) near the bottom end of the filter plate (34), a rotating shaft (24) rotationally connected between the bracket (1) and the return cylinder (23), a return spiral blade (25) fixedly connected to the return cylinder (23) and abutting the return spiral blade (25) on the rotating shaft (24), and a return channel (26) provided on the return cylinder (23) and connected with the crushing box (2), wherein one group of return channels (26) is located above the bottom end of the filter plate (34), and the other group of return channels (26) is located above the second crushing roller (5).

7. The plastic waste recycling device as claimed in claim 6, wherein, A third drive wheel set (28) is fixedly connected to the rotating shaft (24) and the reciprocating screw (27), a guide wheel (29) is arranged on one side of the crushing box (2) near the third drive wheel set (28), and a third belt (30) is sleeved between the third drive wheel set (28) and the guide wheel (29).

8. The plastic waste recycling device as claimed in claim 6, wherein, The inside of the pulverizing box (2) is provided with a discharging channel (35) below the filter plate (34), the inside of the discharging channel (35) is symmetrically provided with a sealing groove (36), the inside of the sealing groove (36) is fixedly connected with a connecting air cylinder (37), the side of the connecting air cylinder (37) close to each other is fixedly connected with a sealing plate (38), Wherein, the side wall of the discharging channel (35) is inclined, the sealing groove (36) and the compression rod (17) are connected through a pipeline.

9. The plastic waste recycling device according to claim 8, wherein, The dehydration mechanism includes a connecting shaft (39) rotatably connected to the bottom of the pulverizing box (2), the connecting shaft (39) and the rotating shaft (24) are both fixedly connected with a fourth driving wheel set (40), the fourth driving wheel set (40) is sleeved with a fourth belt (41), the top end of the connecting shaft (39) is fixedly connected with a centrifugal cylinder (42), the bottom of the pulverizing box (2) is fixedly connected with a water retaining ring (49) matched with the side wall of the centrifugal cylinder (42), Wherein, the side of the pulverizing box (2) close to the water retaining ring (49) is communicated with a drain port, the centrifugal cylinder (42) and the bottom of the pulverizing box (2) are provided with a discharging assembly.

10. The plastic waste recycling device as claimed in claim 9, wherein, The discharging assembly includes a discharging hole (43) opened in the bottom of the centrifugal cylinder (42), the side of the centrifugal cylinder (42) close to the discharging hole (43) is provided with a communication groove (44), the inside of the communication groove (44) is fixedly connected with a third spring (45), the end of the third spring (45) is fixedly connected with a second baffle (46) matched with the communication groove (44), the bottom of the pulverizing box (2) is provided with a discharge port (47), the connecting shaft (39) is fixedly connected with a guide plate (48) matched with the discharge port (47), Wherein, the communication groove (44) and the connecting air cylinder (37) are connected through a slip ring and a pipeline, the slip ring is located between the top of the centrifugal cylinder (42) and the discharging channel (35), the pipeline is penetrated from the discharging channel (35) to the slip ring, and then from the side wall of the centrifugal cylinder (42) to the communication groove (44).

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