Plastic recovery method and plastic recovery device

Abstract

The invention relates to the technical field of plastic recovery, in particular to a plastic recovery method and a plastic recovery device. According to the technical scheme, the plastic product cutting device comprises a crushing box, a supporting frame is arranged outside the crushing box, and a feeding opening is fixedly connected to the top end of the crushing box. By arranging a separating assembly, plastic products with high toughness can be cut, two groups of crushing rollers can be driven to rotate at the same time through a driving assembly, the falling plastic products can be crushed, and the crushing efficiency is improved. By arranging the crushing assembly, the crushed plastic fragments can fall into the discharging opening and are guided to fall out towards one side through the discharging opening, and when the temperature of the crushing roller is high, the plastic attached to the surface of the crushing roller can be scraped through the scraping structure, so that the cleanliness of the outer surface of the crushing roller is kept; the surface temperature of the crushing roller can be reduced, the surface temperature of the crushing roller is prevented from being too high, and the problem that part of plastic is melted on the crushing roller due to heat generated during plastic crushing is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic recycling, in particular to a plastic recycling method and a plastic recycling device. BACKGROUND

[0002] Plastic is a common material and is widely used in life and production. After plastic products are discarded, the plastic products can be recycled. A variety of equipment is used in plastic recycling, and plastic breaking and recycling equipment is a core equipment in a plastic recycling production line, which is mainly used for breaking waste plastics (such as bottles, films, injection molded parts, etc.) into small particles for subsequent cleaning, melting and granulation.

[0003] In the prior art, when waste plastics are recycled, the waste plastics need to be broken into pieces, which can be beneficial to subsequent processing of the plastics. However, in the process of breaking the waste plastics, heat is generated when the breaking rollers rotate to break the plastics. Some plastics with low melting points can melt after being heated. The melted plastics can stick to the breaking rollers. Since the breaking rollers are installed inside the equipment, it is difficult to clean the melted plastics. The melted plastics sticking to the breaking rollers can affect the breaking effect of the waste plastics. Therefore, the present application provides a plastic recycling method and a plastic recycling device. SUMMARY

[0004] The purpose of the present application is to solve the problem that heat generated during plastic breaking causes some plastics to melt on the breaking rollers in the background art. The present application provides a plastic recycling method and a plastic recycling device.

[0005] In a first aspect, the present application provides a plastic recycling device, which comprises a breaking box. The breaking box is externally provided with a support frame. The top end of the breaking box is fixedly connected with a feeding port. The inside of the breaking box is rotatably connected with a first rotating rod and a second rotating rod. The outer wall of the first rotating rod and the second rotating rod is fixedly connected with a breaking roller. The bottom of the breaking box is provided with a discharge port. The breaking roller is driven by a driving assembly. The device further comprises a cleaning assembly for cleaning the plastics on the outer wall of the breaking roller, which comprises a scraping structure and a discharge structure. The scraping structure is used to make the plastics fall off the breaking roller. The scraping structure comprises a brush plate, which is arranged below the breaking roller. The discharge structure is used to discharge the fallen plastics. A cooling assembly for reducing the temperature of the breaking roller. The device further comprises a separation assembly for separating waste plastics with high toughness.

[0006] Optionally, the driving assembly comprises a driving motor, the driving motor is fixedly connected to one side of the crushing box, an output end of the driving motor is fixedly connected with a first rotating rod, an outer wall of the first rotating rod is fixedly connected with a first belt pulley, an outer wall of the first belt pulley is sleeved with a transmission belt pulley, an inner wall of the transmission belt pulley is sleeved with a second belt pulley, the second belt pulley is arranged on the separating assembly, and the crushing rollers and the driving motor are both provided with two groups and are symmetrically distributed on the outer walls of the first rotating rod and the second rotating rod and one end.

[0007] Optionally, the scraping structure further comprises a sleeve, the sleeve is fixedly connected to the outer wall of the second rotating rod, a top end of the sleeve is fixedly connected with a first inclined rod, a bottom of the sleeve is fixedly connected with a second inclined rod, the brush plate is slidingly connected to the inside of the crushing box, a top end of one side of the brush plate is fixedly connected with an inclined block, the inclined block is provided with two groups and is symmetrically distributed on the top end of the brush plate, the second inclined rod is arranged between the two groups of inclined blocks, one end of the brush plate is fixedly connected with a cross rod, and the brush plate is provided with two groups and is symmetrically distributed on the two ends of the cross rod.

[0008] Optionally, the cooling assembly comprises a storage box, the storage box is fixedly connected to the side of the crushing box away from the driving motor, a top end of the storage box is fixedly connected with a water inlet, one side of the storage box is mounted with a glass plate, an inner wall of the storage box is fixedly connected with a baffle above, one end of the crushing roller is fixedly connected with a rotating block, the rotating block is rotatably connected to the inside of the storage box, an inner part of the rotating block is provided with an annular groove, the rotating block is arranged in the inside of the baffle, and the inside of the crushing roller is provided with a water groove.

[0009] Optionally, the discharging structure comprises a square box, the square box is fixedly connected to the bottom of the brush plate, a top end of an inner wall of the square box is fixedly connected with a spring, a bottom of the spring is fixedly connected with a vertical rod, the vertical rod is slidingly connected to the inside of the square box, a bottom of the vertical rod is fixedly connected with a scraper, the bottom of the scraper is attached to the bottom of the inner wall of the discharge port, and the top of the scraper is arranged in an inclined manner.

[0010] Optionally, the bottom of the scraper is provided with a mounting groove, a first pulley is rotatably connected to the inner wall of the mounting groove, the bottom of the first pulley is attached to the bottom of the inner wall of the discharge port, one side of the discharge port is fixedly connected with a mounting plate, one end of the brush plate away from the cross rod is slidingly connected to the mounting plate, a top end of one side of the mounting plate is provided with a sliding groove, a bottom of the brush plate is rotatably connected with a second pulley, and the second pulley is slidingly arranged in the inside of the sliding groove.

[0011] Optionally, the separation assembly comprises a third rotating shaft and a fourth rotating shaft, the third rotating shaft and the fourth rotating shaft are rotationally connected in the crushing box, the first belt pulley, the transmission belt and the second belt pulley are provided with two groups and are distributed in parallel on one side of the crushing box, one end of the third rotating shaft and the fourth rotating shaft is fixedly connected to one side of the two groups of second belt pulleys, the outer wall of the third rotating shaft is fixedly connected with a mounting cylinder, the outer wall of the mounting cylinder is fixedly connected with a scraper, the tail end of the scraper is provided with an angle, the scraper is provided with multiple groups and is circumferentially distributed on the outer wall of the mounting cylinder, and the mounting cylinder is provided with two groups and is symmetrically distributed on the outer walls of the third rotating shaft and the fourth rotating shaft.

[0012] Optionally, the top end of the delivery port is fixedly connected with a top frame, the top end of the inside of the top frame is fixedly connected with a fan, the bottom of the top frame is fixedly connected with a mesh plate, and a filter layer is installed in the inside of the top frame and is arranged between the fan and the mesh plate.

[0013] Optionally, the inside of the crushing box is fixedly connected with a guide plate, the guide plate is inclined downward, the guide plate is provided with two groups and is symmetrically distributed in the inside of the crushing box, and the two groups of guide plates are arranged between the crushing rollers and the mounting cylinder.

[0014] In a second aspect, the present application provides a plastic recycling method applied to the plastic recycling device of the first aspect, which comprises the following steps: S1: Collecting plastic products in household garbage and industrial waste and transporting them to the processing site; S2: Then screening the waste plastics to separate the impurities in the waste plastics and maintain the purity of the waste plastics; S3: Putting the separated waste plastics into the recycling device and crushing the waste plastics by the recycling device to make the plastic products into plastic fragments; S4: Washing the crushed plastic fragments to keep the surface of the plastic fragments clean and tidy, facilitating the subsequent melting and granulation processing of the plastic fragments.

[0015] Compared with the prior art, the present application has at least one of the following beneficial technical effects: The present application can cut plastic products with high toughness by setting the separation assembly, drive the two crushing rollers to rotate simultaneously by the driving assembly, crush the falling plastic products, make the crushed plastic fragments fall into the discharge port and guide the plastic fragments to fall to one side through the discharge port, scrape the plastic attached to the surface of the crushing roller through the scraping structure when the temperature of the crushing roller is high, keep the surface of the crushing roller clean, reduce the temperature of the surface of the crushing roller through the cooling assembly, prevent the temperature of the surface of the crushing roller from being too high, and solve the problem that the heat generated during plastic crushing causes part of the plastic to melt on the crushing roller. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a plastic recycling method and a plastic recycling device. Figure 2 This is a schematic diagram of the driver component structure; Figure 3 This is a schematic diagram of the cross-sectional structure of the crushing roller; Figure 4 This is a schematic diagram of the scraping structure; Figure 5 This is a schematic diagram of the cross-sectional structure of the storage box; Figure 6 for Figure 5 A magnified structural diagram at point A; Figure 7 This is a schematic cross-sectional view of a plastic recycling method and a plastic recycling device. Figure 8 for Figure 7 A magnified structural diagram at point B; Figure 9 This is a schematic diagram of the cross-sectional structure of the brush plate; Figure 10 for Figure 9 A magnified structural diagram at point C; Figure 11 for Figure 9 A magnified structural diagram at point D; Figure 12 This is a schematic diagram of the structure in contact between the first inclined rod and a set of inclined blocks; Figure 13 This is a schematic diagram of the structure in contact between the second inclined rod and another set of inclined blocks.

[0017] Reference numerals: 1. Crushing box; 2. Support frame; 3. Feeding port; 4. Crushing roller; 6. Discharge port; 7. Drive motor; 8. First rotating rod; 9. First pulley; 10. Transmission belt; 11. Second pulley; 12. Second rotating rod; 13. Sleeve; 14. First inclined rod; 15. Second inclined rod; 16. Brush plate; 17. Inclined block; 18. Crossbar; 19. Storage box; 20. Water inlet; 21. 21. Glass plate; 22. Baffle; 23. Rotating block; 24. Water tank; 25. Square frame; 26. Spring; 27. Vertical rod; 28. Scraper; 29. ​​First pulley; 30. Mounting plate; 31. Slide groove; 32. Second pulley; 33. Third rotating rod; 34. Fourth rotating rod; 35. Mounting cylinder; 36. Scraper; 37. Top frame; 38. Fan; 39. Mesh plate; 40. Filter layer; 41. Guide plate. Detailed Implementation

[0018] In order to make the inventive object, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0020] The technical solutions of the present application will be further illustrated below by specific embodiments in conjunction with the accompanying drawings.

[0021] As Figure 1 Figure 13 ​The application provides a plastic recycling device, which comprises a crushing box 1, a supporting frame 2 is arranged outside the crushing box 1, a feeding port 3 is fixed to the top end of the crushing box 1, a first rotating rod 8 and a second rotating rod 12 are rotationally connected to the inside of the crushing box 1, a crushing roller 4 is fixed to the outer wall of the first rotating rod 8 and the second rotating rod 12, a discharge port 6 is arranged at the bottom of the crushing box 1, the crushing roller 4 is driven by a driving assembly, and the device further comprises a cleaning assembly for cleaning the plastic on the outer wall of the crushing roller 4, the cleaning assembly comprises a scraping structure and a discharging structure; the scraping structure is used for facilitating the plastic to fall off the crushing roller 4, the scraping structure comprises a brush plate 16, the brush plate 16 is arranged below the crushing roller 4, the scraping structure further comprises a sleeve 13, the sleeve 13 is fixed to the outer wall of the second rotating rod 12, a first inclined rod 14 is fixed to the top end of the sleeve 13, a second inclined rod 15 is fixed to the bottom of the sleeve 13, the brush plate 16 is slidably connected to the inside of the crushing box 1, an inclined block 17 is fixed to the top end of one side of the brush plate 16, the two groups of inclined blocks 17 are symmetrically arranged at the top end of the brush plate 16, the second inclined rod 15 is arranged between the two groups of inclined blocks 17, a cross rod 18 is fixed to one end of the brush plate 16, and the two groups of brush plates 16 are symmetrically arranged at the two ends of the cross rod 18; the discharging structure is used for discharging the falling plastic, the discharging structure comprises a square frame 25, the square frame 25 is fixed to the bottom of the brush plate 16, a spring 26 is fixed to the top end of the inner wall of the square frame 25, a vertical rod 27 is fixed to the bottom of the spring 26, the vertical rod 27 is slidably connected to the inside of the square frame 25, a scraper 28 is fixed to the bottom of the vertical rod 27, the bottom of the scraper 28 is attached to the bottom of the inner wall of the discharge port 6, the top of the scraper 28 is arranged in a slope, an installation groove is formed in the bottom of the scraper 28, a first pulley 29 is rotationally connected to the inner wall of the installation groove, the bottom of the first pulley 29 is attached to the bottom of the inner wall of the discharge port 6, an installation plate 30 is fixed to one side of the discharge port 6, one end of the brush plate 16, away from the cross rod 18, is slidably connected to the installation plate 30, a sliding groove 31 is formed in the top end of one side of the installation plate 30, a second pulley 32 is rotationally connected to the bottom of the brush plate 16, and the second pulley 32 is slidably arranged in the sliding groove 31. As Figure 2 , Figure 4 , Figure 12 and Figure 13As shown, in order to solve the problem that the heat generated when the plastic is broken causes part of the plastic to melt on the crushing roller 4, when it is necessary to recycle waste plastics, the sieved waste plastics can be put into the feeding port 3 and dropped downward by gravity, the driving assembly can drive the two sets of crushing rollers 4 to rotate at the same time, and the dropped plastic products can be crushed, the crushed plastic pieces will fall into the discharge port 6, and the plastic pieces will fall out to one side through the discharge port 6, when the temperature of the crushing roller 4 is high, when the second rotating rod 12 is driven to rotate by the driving motor 7, the sleeve 13 arranged outside the second rotating rod 12 will also rotate, the sleeve 13 will drive the first inclined rod 14 and the second inclined rod 15 to rotate circumferentially, when the first inclined rod 14 rotates to the top of a set of brush plates 16, the inclined surface will contact the inclined surface of a set of inclined blocks 17, and the inclined blocks 17 will be pushed to one side when the first inclined rod 14 rotates, since the distance between the two sets of inclined blocks 17 is slightly greater than the first inclined rod 14, the first inclined rod 14 will pass between the two sets of inclined blocks 17 after pushing the inclined blocks 17 to move, the inclined blocks 17 will drive the brush plates 16 to move when they are pushed, the brush plates 16 can change the position below the crushing roller 4, so that the movement of the brush plates 16 can cooperate with the rotation of the crushing roller 4 to clean the surface of the crushing roller 4, and when the second inclined rod 15 rotates above the brush plates 16, since the first inclined rod 14 and the second inclined rod 15 are not in the same horizontal plane, and the two sets of inclined blocks 17 have been pushed to one side at this time, the second inclined rod 15 will be located between the two sets of inclined blocks 17, and when the second inclined rod 15 rotates, the inclined surface will contact the other set of inclined blocks 17 and push the other set of inclined blocks 17 to move in the opposite direction, since the two sets of inclined blocks 17 are symmetrically distributed, the other set of inclined blocks 17 will drive the brush plates 16 to reset to one side when they move, after the two sets of inclined blocks 17 and the brush plates 16 are reset, the second inclined rod 15 moves out of the gap between the two sets of inclined blocks 17, and the brush plates 16 can be driven to move back and forth by the continuous rotation of the sleeve 13, thereby facilitating to improve the cleaning effect of the surface of the crushing roller 4, so as to keep the surface of the crushing roller 4 clean, when the brush plates 16 move to one side, the square frame 25 at the bottom will also move, the vertical rod 27 and the scraper 28 will move when the square frame 25 moves, since the scraper 28 is attached to the bottom of the discharge port 6, the scraper 28 will push the plastic pieces on the bottom of the inner wall of the discharge port 6 to one side when it moves, and the downward pushing force of the spring 26 can make the scraper 28 tightly attached to the bottom of the inner wall of the discharge port 6, when the brush plates 16 move in the opposite direction, the scraper 28 will also move in the opposite direction, and the vertical rod 27 will move upwards to press the spring 26, so that the scraper 28 remains attached to the bottom of the inner wall of the discharge port 6, and the top plate of the scraper 28 is inclined, which can promote the falling of the upper pieces to one side when moving, when the scraper 28 moves, the first pulley 29 inside the installation groove of the scraper 28 will slide on the bottom of the inner wall of the discharge port 6, thereby increasing the smoothness of the movement of the scraper 28 through the first pulley 29,One end of the scraper 28 can be lifted, and the scraper 28 moves to drive the second pulley 32 to move in the chute 31, which can reduce the friction between the scraper 28 and the mounting plate 30.

[0022] As an implementation form, as Figure 2 and Figure 7 The driving assembly comprises a driving motor 7 fixedly connected to one side of the crushing box 1, an output end of the driving motor 7 is fixedly connected with a first rotating rod 8, an outer wall of the first rotating rod 8 is fixedly connected with a first belt pulley 9, the first belt pulley 9 is sleeved with a transmission belt 10, an inner wall of the transmission belt 10 is sleeved with a second belt pulley 11, the second belt pulley 11 is arranged on the separation assembly, the crushing roller 4 and the driving motor 7 are both provided with two groups and are symmetrically distributed at the outer wall and one end of the first rotating rod 8 and the second rotating rod 12, the separation assembly comprises a third rotating rod 33 and a fourth rotating rod 34, the third rotating rod 33 and the fourth rotating rod 34 are rotationally connected in the crushing box 1, the first belt pulley 9, the transmission belt 10 and the second belt pulley 11 are all provided with two groups and are parallelly distributed at one side of the crushing box 1, one end of the third rotating rod 33 and the fourth rotating rod 34 is respectively fixedly connected to one side of the two groups of second belt pulleys 11, an outer wall of the third rotating rod 33 is fixedly connected with a mounting cylinder 35, an outer wall of the mounting cylinder 35 is fixedly connected with a scraper 36, an end of the scraper 36 is provided with an angle, the scraper 36 is provided with multiple groups and is circumferentially distributed on the outer wall of the mounting cylinder 35, the mounting cylinder 35 is provided with two groups and is symmetrically distributed on the outer wall of the third rotating rod 33 and the fourth rotating rod 34, an inner wall of the crushing box 1 is fixedly connected with a guide plate 41, the guide plate 41 is inclined downward, the guide plate 41 is provided with two groups and is symmetrically distributed in the inner wall of the crushing box 1, and the two groups of guide plates 41 are arranged between the crushing roller 4 and the mounting cylinder 35.

[0023] When the plastic needs to be crushed, two sets of drive motors 7 can be started, and when the two sets of drive motors 7 are running, the first rotating rod 8 and the second rotating rod 12 at the output end will rotate, and the rotating direction of the first rotating rod 8 and the second rotating rod 12 is opposite, so it will drive the two sets of crushing rollers 4 to rotate to the center at the same time, and the two sets of crushing rollers 4 can crush the waste plastic when rotating, and facilitate the movement of the waste plastic to the center, and the first pulley 9 will rotate when the first rotating rod 8 rotates, and the transmission belt 10 provided on the outer wall of the first pulley 9 will rotate when the first pulley 9 rotates, and the second pulley 11 will rotate when the transmission belt 10 rotates, so as to simultaneously provide power to the separation assembly, and when the second pulley 11 rotates, the third rotating rod 33 will rotate, and the mounting cylinder 35 and the plurality of scrapers 36 on the outer wall of the third rotating rod 33 will rotate at the same time, and the scrapers 36 at the end of the scraper 36 are provided with an angle, which can cut off the waste plastic with high toughness, and because the first pulley 9, the transmission belt 10 and the second pulley 11 are provided with two sets, so the fourth rotating rod 34 can be driven to rotate by the other group of second pulleys 11, and the other group of mounting cylinders 35 and scrapers 36 provided on the fourth rotating rod 34 will also rotate, and the two sets of mounting cylinders 35 rotate to the center at the same time, which is more conducive to cutting off the high-toughness plastic, and facilitating the downward transmission of the plastic, and the gap between the plurality of scrapers 36 is large, so part of the hard plastic pieces with small mass can pass through the gap between the scrapers 36. By providing two guide plates 41 in the crushing box 1, the waste plastic falling downward can be guided to the center, so that the waste plastic is crushed by the two sets of crushing rollers 4.

[0024] It should be noted that, as Figure 3 and Figure 6 , the cooling assembly comprises a storage tank 19, the storage tank 19 is fixedly connected to the side of the crushing box 1 away from the drive motor 7, the top end of the storage tank 19 is fixedly connected with a water inlet 20, one side of the storage tank 19 is provided with a glass plate 21, the upper part of the inner wall of the storage tank 19 is fixedly connected with a baffle 22, one end of the crushing roller 4 is fixedly connected with a rotating block 23, the rotating block 23 is rotatably connected inside the storage tank 19, the rotating block 23 is provided inside the baffle 22, and the water tank 24 is provided in the crushing roller 4. The water tank 24 is in communication with the annular groove.

[0025] When cooling of the crushing roller 4 is required, cooling water can be added to the storage tank 19 through the water inlet 20. The water level can be limited by the baffle 22, and the water level can be observed by the glass plate 21. Water addition can be stopped when the water level is level with the bottom of the baffle 22. When the drive motor 7 drives the two sets of crushing rollers 4 to rotate, it will simultaneously drive the rotating block 23 on one side of the crushing roller 4 to rotate. Since the rotating block 23 is provided with an annular groove, the cooling water can flow into the water tank 24 of the crushing roller 4 through the annular groove. However, due to the water level limitation by the baffle 22, the cooling water can only maintain the water tank 24. Half of the capacity is used to cool the crushing roller 4 when it rotates. Since the cooling water is always kept below the water tank 24, the rotation of the crushing roller 4 can make the cooling water evenly cool the surface of the crushing roller 4. When the crushing roller 4 rotates, it will cause the cooling water to tumble, causing some of the cooling water to tumble from the annular groove into the inner wall of the baffle 22 and fall back into the storage tank 19. This can facilitate the rotation of cooling water, allowing some of the heated cooling water to be thrown out, and the water in the storage tank 19 can be used to replenish the water tank 24 with cooler water.

[0026] Furthermore, such as Figure 8 The top of the feeding port 3 is fixedly connected to a top frame 37, the top of the top of the top frame 37 is fixedly connected to a fan 38, the bottom of the top frame 37 is fixedly connected to a mesh plate 39, and a filter layer 40 is installed inside the top frame 37, which is disposed between the fan 38 and the mesh plate 39.

[0027] Because fine dust is generated when waste plastic is crushed and mixed in with the air, the air in the crushing box 1 can be drawn into the top frame 37 by starting the fan 38. The screen plate 39 can prevent plastic fragments from entering the top frame 37. When the air is drawn into the filter layer 40, the dust in the air can be adsorbed and treated by the filter layer 40.

[0028] A method for recycling plastics, comprising the following steps: S1: Collect plastic products from household waste and industrial waste, and transport them to the processing site; S2: The waste plastics are then screened to separate out impurities and maintain their purity. S3: Place the separated waste plastic into the recycling device, and use the recycling device to crush the waste plastic products into plastic fragments. S4: Clean the crushed plastic fragments to keep their surface clean and tidy, which will facilitate the subsequent melting and granulation process.

[0029] In the embodiment, to solve the problem that the heat generated when the plastic is broken causes part of the plastic to melt on the crushing roller 4, when it is necessary to recycle waste plastics, the sieved waste plastics can be put into the feeding port 3 and dropped downward by gravity. By setting the separating assembly, the plastic products with high toughness can be cut. When it is necessary to crush the plastic, two groups of driving motors 7 can be started. When the two groups of driving motors 7 are running, the first rotating rod 8 and the second rotating rod 12 at the output end will rotate. The rotating directions of the first rotating rod 8 and the second rotating rod 12 are opposite, so the two groups of crushing rollers 4 will rotate towards the center at the same time. The two groups of crushing rollers 4 can crush the waste plastics when rotating, which is beneficial to make the waste plastics move towards the center. When the first rotating rod 8 rotates, the first pulley 9 will rotate, which will drive the transmission belt 10 provided on the outer wall of the first pulley 9 to rotate. When the transmission belt 10 rotates, the second pulley 11 will rotate, thereby providing power for the separating assembly at the same time. When the second pulley 11 rotates, the third rotating rod 33 will rotate, which will make the installation cylinder 35 and the plurality of scrapers 36 on the outer wall of the third rotating rod 33 rotate at the same time. The scrapers 36 at the end are provided with an angle, which can cut the waste plastics with high toughness. Since the first pulley 9, the transmission belt 10 and the second pulley 11 are provided with two groups, the fourth rotating rod 34 can be driven to rotate by the other group of second pulleys 11. Another group of installation cylinders 35 and scrapers 36 provided on the fourth rotating rod 34 will also rotate at the same time. The two groups of installation cylinders 35 rotate towards the center at the same time, which is more conducive to cutting the high-toughness plastics and conveying the plastics downward. The gap between the plurality of scrapers 36 is large, so part of the hard plastic parts with small mass can pass through the gap of the scrapers 36. By setting two groups of guide plates 41 in the crushing box 1, the waste plastics falling downward can be guided to the center, thereby facilitating the waste plastics to be crushed by the two groups of crushing rollers 4; The broken plastic pieces will fall into the discharge port 6 and be guided to one side by the discharge port 6. When the temperature of the crushing roller 4 is high, the second rotating rod 12 will rotate with the sleeve 13 arranged outside the second rotating rod 12 when the second rotating rod 12 is driven to rotate by the driving motor 7. The sleeve 13 will drive the first inclined rod 14 and the second inclined rod 15 to rotate in a circle. When the first inclined rod 14 rotates to the top of the group of brush plates 16, the inclined surface will contact the group of inclined blocks 17 and push the inclined blocks 17 to one side when the first inclined rod 14 rotates. The inclined blocks 17 will drive the brush plates 16 to move when they are pushed. The brush plates 16 can change the position below the crushing roller 4 when they move, so that the surface of the crushing roller 4 can be cleaned by the movement of the brush plates 16 cooperating with the rotation of the crushing roller 4. When the second inclined rod 15 rotates above the brush plates 16, the inclined surface will contact the other group of inclined blocks 17 and push the other group of inclined blocks 17 to move to one side. Since the two groups of inclined blocks 17 are symmetrically distributed, the other group of inclined blocks 17 will drive the brush plates 16 to reset to one side when they move. The brush plates 16 can be driven to reciprocate by the continuous rotation of the sleeve 13, so as to improve the cleaning effect of the surface of the crushing roller 4 and keep the outer surface of the crushing roller 4 clean. When the brush plates 16 move to one side, the square frame 25 at the bottom will move together. The square frame 25 will drive the vertical rod 27 and the scraper 28 to move when it moves. Since the scraper 28 is attached to the bottom of the discharge port 6, the scraper 28 will push the plastic pieces at the bottom of the inner wall of the discharge port 6 to one side when it moves. The downward pushing force of the spring 26 can make the scraper 28 tightly attached to the bottom of the inner wall of the discharge port 6. When the brush plates 16 move in the opposite direction, the scraper 28 will also move in the opposite direction and be pressed upward by the vertical rod 27 to compress the spring 26, so as to keep the scraper 28 attached to the bottom of the inner wall of the discharge port 6. At the same time, the top plate of the scraper 28 is inclined, which can promote the falling of the upper pieces to one side when it moves. When the scraper 28 moves, the first pulley 29 inside the installation groove of the scraper 28 will slide on the bottom of the inner wall of the discharge port 6, so as to increase the smoothness of the movement of the scraper 28. The installation plate 30 can be arranged to lift one end of the scraper 28. The second pulley 32 will move in the sliding groove 31 when the scraper 28 moves, which can reduce the friction between the scraper 28 and the installation plate 30. When the crushing roller 4 needs to be cooled, cooling water can be added to the storage tank 19 through the water inlet 20, the water level can be limited by the baffle 22, and the water level can be observed through the glass plate 21. When the water level is level with the bottom of the baffle 22, the water addition can be stopped. When the driving motor 7 drives the two sets of crushing rollers 4 to rotate, the rotating block 23 on one side of the crushing roller 4 will also rotate. Since the rotating block 23 is provided with an annular groove, the cooling water can flow into the water tank 24 of the crushing roller 4 through the annular groove. Since the baffle 22 limits the water level, the cooling water can only maintain half the capacity of the water tank 24. When the crushing roller 4 rotates, the cooling water can cool the crushing roller 4. Since the cooling water is always below the water tank 24, the rotation of the crushing roller 4 can make the cooling water evenly cool the surface of the crushing roller 4. When the crushing roller 4 rotates, it will cause the cooling water to roll, causing part of the cooling water to roll into the inner wall of the baffle 22 from the annular groove and fall back into the storage tank 19. This can facilitate the rotation of the cooling water, so that the heated cooling water is thrown out, and the water in the storage tank 19 can be replenished into the water tank 24 with lower temperature. When the waste plastic is crushed, fine dust will be generated and mixed in the air. By starting the fan 38, the air in the crushing box 1 can be sucked into the top frame 37. By providing the mesh plate 39, the plastic fragments can be prevented from entering the top frame 37. When the air is sucked into the filter layer 40, the dust in the air can be adsorbed by the filter layer 40.

[0030] The above specific embodiments are only several optional embodiments of the present application. Based on the technical solutions of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A plastic recycling device, comprising a crushing box (1), a support frame (2) provided on the outside of the crushing box (1), a feeding port (3) fixedly connected to the top of the crushing box (1), a first rotating rod (8) and a second rotating rod (12) rotatably connected inside the crushing box (1), a crushing roller (4) fixedly connected to the outer wall of the first rotating rod (8) and the second rotating rod (12), and a discharge port (6) installed at the bottom of the crushing box (1), wherein the crushing roller (4) is driven by a driving assembly, characterized in that: It also includes a cleaning assembly for cleaning the plastic on the outer wall of the crushing roller (4), the cleaning assembly including a scraping structure and a discharge structure; The scraping structure is used to cause plastic to fall off the crushing roller (4), and the scraping structure includes a brush plate (16) disposed below the crushing roller (4); The discharge structure is used to deliver the fallen plastic. Cooling components for reducing the temperature of the crushing roller (4); It also includes a separation component for splitting tough waste plastics.

2. The plastic recycling device according to claim 1, characterized in that, The drive assembly includes a drive motor (7), which is fixed to one side of the crushing box (1). The output end of the drive motor (7) is fixed to a first rotating rod (8). The outer wall of the first rotating rod (8) is fixed to a first pulley (9). The outer wall of the first pulley (9) is fitted with a transmission belt (10). The other side of the inner wall of the transmission belt (10) is fitted with a second pulley (11). The second pulley (11) is set on the separation assembly. The crushing roller (4) and the drive motor (7) are each provided in two sets, and are symmetrically distributed on the outer wall and one end of the first rotating rod (8) and the second rotating rod (12), respectively.

3. A plastic recycling device according to claim 2, characterized in that, The scraping structure also includes a sleeve (13), which is fixed to the outer wall of the second rotating rod (12). A first inclined rod (14) is fixed to the top of the sleeve (13), and a second inclined rod (15) is fixed to the bottom of the sleeve (13). The brush plate (16) is slidably connected to the inside of the crushing box (1). An inclined block (17) is fixed to the top of one side of the brush plate (16). Two sets of inclined blocks (17) are provided and are symmetrically distributed at the top of the brush plate (16). The second inclined rod (15) is provided between the two sets of inclined blocks (17). A crossbar (18) is fixed to one end of the brush plate (16). Two sets of brush plates (16) are provided and are symmetrically distributed at both ends of the crossbar (18).

4. A plastic recycling device according to claim 3, characterized in that, The cooling assembly includes a storage tank (19), which is fixed to the side of the crushing box (1) away from the drive motor (7). A water inlet (20) is fixed to the top of the storage tank (19). A glass plate (21) is installed on one side of the storage tank (19). A baffle (22) is fixed to the upper part of the inner wall of the storage tank (19). A rotating block (23) is fixed to one end of the crushing roller (4). The rotating block (23) is rotatably connected to the inside of the storage tank (19). An annular groove is opened inside the rotating block (23). The rotating block (23) is set inside the baffle (22). A water tank (24) is opened inside the crushing roller (4). The water tank (24) is connected to the annular groove.

5. A plastic recycling device according to claim 4, characterized in that, The discharge structure includes a square frame (25), which is fixed to the bottom of the brush plate (16). A spring (26) is fixed to the top of the inner wall of the square frame (25), and a vertical rod (27) is fixed to the bottom of the spring (26). The vertical rod (27) is slidably connected inside the square frame (25), and a scraper (28) is fixed to the bottom of the vertical rod (27). The bottom of the scraper (28) is attached to the bottom of the inner wall of the discharge port (6), and the top of the scraper (28) is inclined.

6. A plastic recycling device according to claim 5, characterized in that, The scraper (28) has an installation groove at its bottom. The inner wall of the installation groove is rotatably connected to a first pulley (29). The bottom of the first pulley (29) is attached to the bottom of the inner wall of the discharge port (6). An installation plate (30) is fixed to one side of the discharge port (6). The end of the brush plate (16) away from the crossbar (18) is slidably connected to the installation plate (30). A sliding groove (31) is provided at the top of one side of the installation plate (30). The bottom of the brush plate (16) is rotatably connected to a second pulley (32). The second pulley (32) is slidably disposed inside the sliding groove (31).

7. A plastic recycling device according to claim 6, characterized in that, The separation assembly includes a third rotating rod (33) and a fourth rotating rod (34). The third rotating rod (33) and the fourth rotating rod (34) are rotatably connected inside the crushing box (1). The first pulley (9), the transmission belt (10), and the second pulley (11) are each provided in two sets and are distributed in parallel on one side of the crushing box (1). One end of the third rotating rod (33) and the fourth rotating rod (34) are respectively fixed to one side of the two sets of second pulleys (11). The outer wall of the third rotating rod (33) is fixedly connected to an installation cylinder (35). The outer wall of the installation cylinder (35) is fixedly connected to a scraper (36). The end of the scraper (36) is provided with a bend. There are multiple sets of scrapers (36) and they are distributed circumferentially on the outer wall of the installation cylinder (35). There are two sets of installation cylinders (35) and they are symmetrically distributed on the outer walls of the third rotating rod (33) and the fourth rotating rod (34).

8. A plastic recycling device according to claim 7, characterized in that, The top of the feeding port (3) is fixedly connected to a top frame (37), the top of the top of the top frame (37) is fixedly connected to a fan (38), the bottom of the top frame (37) is fixedly connected to a mesh plate (39), a filter layer (40) is installed inside the top frame (37), and the filter layer (40) is located between the fan (38) and the mesh plate (39).

9. A plastic recycling device according to claim 8, characterized in that, The crushing box (1) is fixedly connected to a guide plate (41). The guide plate (41) is inclined downward. There are two sets of guide plates (41) and they are symmetrically distributed inside the crushing box (1). The two sets of guide plates (41) are arranged between the crushing roller (4) and the mounting cylinder (35).

10. A plastic recycling method, applied to the plastic recycling apparatus of claim 9, characterized in that, The method includes the following steps: S1: Collect plastic products from household waste and industrial waste, and transport them to the processing site; S2: The waste plastics are then screened to separate out impurities and maintain their purity. S3: Place the separated waste plastic into the recycling device, and use the recycling device to crush the waste plastic products into plastic fragments. S4: Clean the crushed plastic fragments to keep their surface clean and tidy, which will facilitate the subsequent melting and granulation process.

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