Excess material recycling treatment device and recycling method for plastic pipe production

Abstract

The present application relates to the field of plastic waste recycling, in particular to a plastic pipe production surplus material recycling device, comprising a recycling box, a PCL control cabinet is installed on one side of the recycling box, a cleaning barrel is installed on the upper inner wall of the recycling box, and the inside of the cleaning barrel is communicated with the top of the recycling box, and a water pump is symmetrically installed below the inside of the recycling box. The present application is characterized in that the three levels of sieve barrels are nested in a decreasing size of sieve hole, and the differential rotation realizes automatic classification of surplus materials, the spiral scraper synchronously prevents blockage and improves the cleaning effect, completes the integrated operation of cleaning and classification, improves the recycling efficiency and the quality of the recycled materials. At the same time, a single servo motor transmits power through a planetary gear train composed of a sun gear, a planetary gear and a gear ring, directly drives the upper planetary crushing mechanism after amplifying the torque, without an additional power source, simplifies the structure, reduces the cost and energy consumption, and cooperates with the crushing structure of revolution and rotation, significantly improves the crushing efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of plastic waste recycling, specifically to a device and method for recycling and utilizing waste materials from plastic pipe production. Background Technology

[0002] Waste plastic recycling refers to the entire process of collecting, classifying, cleaning, crushing, sorting, and reprocessing waste plastic products generated after the production, processing, consumption, and use of plastics, and treating them through physical, chemical, or energy recovery methods to restore their resource utilization value; aiming to achieve resource recycling, reduce white pollution, and lower carbon emissions and petroleum consumption.

[0003] In patent application CN223211720U, published on August 12, 2025, entitled "A Device for Separating Plastic Products from Waste," this application discloses a device for separating plastic products from waste. It includes a crushing box, a crushing assembly, and auxiliary components. The auxiliary components include a screening box, a sealing plate, a mounting frame, a screen, a water tank, a geared disc frame, a filter cover, a positioning plate, a waterproof motor, a drive gear, a horizontal plate, a magnetic rod, and a vibrating component. After the plastic is crushed by the crushing assembly and screened, the plastic particles that pass through the screen fall into the filter cover. Furthermore, controlling the waterproof motor rotates the drive gear, which in turn rotates the geared disc frame, allowing the filter cover to rotate. After rotation, cleaning water is sprayed into the filter cover through a water spray pipe, thus cleaning the plastic parts. Finally, the wastewater is discharged by opening the drain valve on the water tank. This solves the problem that existing devices cannot remove the mud and sand from the surface of plastic waste after crushing and screening, thus affecting the secondary utilization of plastic waste.

[0004] In the aforementioned patents or prior art, the waste plastic recycling process requires crushing. However, existing waste plastic recycling processes cannot achieve multi-size grading and screening of plastic particles. Since waste plastic needs to be reprocessed after recycling, and the hot melting process of plastic has high requirements for the uniform size of the particles, after the existing crushing, washing and impurity removal, a sorting process needs to be added in the subsequent recycling process to ensure that the plastic particles are compatible with different processing equipment. This not only prolongs the waste plastic recycling process, increases equipment investment and floor space, but also significantly increases recycling costs and operational difficulty.

[0005] Therefore, it is necessary to invent a device and method for recycling and processing waste materials from plastic pipe production to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for recycling and processing waste materials from plastic pipe production. Through a planetary gear transmission system driven by a single servo motor, it realizes the integrated operation of crushing, three-stage differential screening and spiral cleaning, so as to solve the problems of multiple power sources, complex structure, and separation of processes in existing plastic pipe waste material recycling devices, resulting in low processing efficiency, easy clogging of screen holes and poor consistency of recycled material quality.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a recycling and processing device for waste materials from plastic pipe production, comprising a recycling bin, a PCL control cabinet installed on one side of the recycling bin, a cleaning tank installed on the upper part of the inner wall of the recycling bin, and the interior of the cleaning tank communicating with the top of the recycling bin, water pumps symmetrically installed at the lower part of the inside of the recycling bin, both sets of water pumps being connected to the cleaning tank pipes, and both sets of water pumps being electrically connected to the PCL control cabinet, and the two sets of water pumps controlling the inlet and outlet of water respectively, a first screen barrel fixedly installed inside the cleaning tank, a second screen barrel sleeved on the outside of the first screen barrel, and the screen hole size of the second screen barrel being smaller than that of the first screen barrel, a third screen barrel disposed inside the first screen barrel, and the screen hole size of the third screen barrel being larger than that of the first screen barrel.

[0008] As a preferred embodiment of the present invention, four sets of planetary gears are rotatably installed in a ring on the lower part of the inner wall of the first screen barrel. A servo motor is installed at the bottom of the recycling box, and the output end of the servo motor is shaft-connected to the second screen barrel. The servo motor is also electrically connected to the PCL control cabinet. A sun gear is fixedly shaft-connected to the inner wall of the second screen barrel, and the sun gear is located inside the first screen barrel. The sun gear meshes with the four sets of planetary gears.

[0009] As a preferred embodiment of the present invention, a spiral scraper is installed on both the inner and outer walls of the screen barrel 2, with the outer spiral scraper 1 fitting against the inner wall of the washing barrel and the inner spiral scraper 1 fitting against the outer side of the screen barrel 1.

[0010] As a preferred embodiment of the present invention, spiral scrapers II are installed on both the inner and outer walls of the screen barrel III, and the outer spiral scraper II is in contact with the inner wall of the screen barrel I, and the spiral directions of the spiral scraper II and the spiral scraper I are opposite.

[0011] As a preferred embodiment of the present invention, a connecting cylinder is installed at the bottom of the screen barrel three, and a gear ring one is installed on the inner wall of the connecting cylinder, and the gear ring one meshes with four sets of planetary gears.

[0012] As a preferred embodiment of the present invention, the bottom of the first sieve barrel, the second sieve barrel, and the third sieve barrel are all equipped with sealing rings, and the sealing rings of each group of components are all in contact with the lower part of the inner wall of the corresponding sleeved component.

[0013] As a preferred embodiment of the present invention, a crushing barrel is installed on the top of the recycling bin, a guide cylinder is installed below the crushing barrel and the guide cylinder is located above the screen barrel three, a connecting shaft is installed below the inner wall of the screen barrel three and the connecting shaft extends through into the crushing barrel, and the connecting shaft passes through the center position of the spiral scraper two on the inner side of the screen barrel three.

[0014] As a preferred embodiment of the present invention, a first crushing shaft is sleeved and fixed on the connecting shaft, a pentagonal frame is sleeved and installed on the connecting shaft, and five sets of second crushing shafts are installed in a ring on the pentagonal frame, and the second crushing shafts are all meshed with the first crushing shaft.

[0015] As a preferred embodiment of the present invention, each of the five sets of crushing shafts is equipped with a circular gear, a fixed cylinder is installed on the top of the crushing barrel, and a toothed ring is installed on the inner wall of the fixed cylinder, and the toothed ring meshes with the corresponding circular gears of each set.

[0016] A method for recycling waste materials from plastic pipe production, employing the waste material recycling and processing device described above, includes the following steps: Step 1: Start the inlet water pump via the PCL control cabinet to inject an appropriate amount of cleaning water into the cleaning tank to the specified level. Based on the material, degree of contamination, and processing volume of the waste material to be treated, preset the servo motor speed, water pump operating cycle, and total processing time parameters on the PCL control cabinet.

[0017] Step 2: Press the start button on the PCL control cabinet, and the servo motor and two sets of water pumps will start running simultaneously. The servo motor drives the second and third screen barrels and the crushing mechanism above them to operate synchronously through the planetary gear transmission system, forming a circulating cleaning water flow and a differential screening environment.

[0018] Step 3: Slowly and evenly feed the large pieces of plastic pipe scrap to be recycled into the crushing bin. Under the action of the planetary crushing structure formed by the first crushing shaft and the five sets of crushing shafts, the scrap is sheared, squeezed and ground into particles of uniform size.

[0019] Step 4: The crushed particles fall into the inner part of screen barrel three through the guide cylinder. Under the differential rotation of screen barrel two and screen barrel three, particles of different sizes are automatically classified and screened through the three-stage nested screen barrels. At the same time, under the action of spiral scraper one and spiral scraper two, they are constantly tumbled up and down in the washing water to complete the cleaning of surface oil and impurities.

[0020] Step 5: The cleaned residual materials of different particle sizes are continuously conveyed upwards by the spiral scraper to the top discharge port of their respective screen barrels. Collection containers are placed below each discharge port to collect the recycled plastic granules of different particle sizes, which can be directly used for the reprocessing of plastic pipes of different specifications.

[0021] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. Through a three-tiered nested design of screen barrels (Section 1, Section 2, and Section 3), with screen aperture sizes progressively larger (Section 3 > Section 1 > Section 2), and differential rotation between Sections 2 and 3, the pulverized residue can be automatically separated into different particle size grades and collected separately. Simultaneously, spiral scrapers 1 and 2, during the conveying of the residue, continuously scrape away residue and dirt adhering to the inner walls of each screen barrel, effectively preventing screen clogging and ensuring continuous and stable screening and cleaning processes. They also cause the residue to continuously tumble in the cleaning water, significantly improving the cleaning effect. This integrated operation of cleaning and grading significantly improves the recycling efficiency and quality consistency of plastic pipe residue. 2. The power output from the servo motor is transmitted through a planetary gear train consisting of a sun gear, four sets of planetary gears, and a ring gear, effectively increasing the output torque and providing stronger power output to the connecting shaft. This power directly drives the planetary crushing mechanism above, eliminating the need for a separate power source for the crushing process, simplifying the device structure, and reducing manufacturing costs and energy consumption. The increased torque, combined with the planetary crushing structure formed by the revolution and rotation of the first crushing shaft and the five sets of second crushing shafts, enables faster and more thorough shearing, extrusion, and grinding of plastic pipe residues of various shapes and hardnesses, significantly improving crushing efficiency and quality. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the recycling bin of the present invention; Figure 3 This is a schematic diagram of the body planing structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the recycling bin and the sieve bucket of the present invention; Figure 5 This is a schematic diagram of the assembly structure of each screen barrel of the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of each screen barrel of the present invention; Figure 7 This is a schematic diagram of the shredding structure of the crushing barrel of the present invention; Figure 8 For the present invention Figure 5Enlarged structural diagram at point A in the middle.

[0024] Explanation of reference numerals in the attached figures: 101. Recycling bin; 102. PCL control cabinet; 103. Cleaning tank; 104. Water pump; 201. Screen barrel one; 202. Planetary gear; 203. Servo motor; 204. Screen barrel two; 205. Sun gear; 206. Spiral scraper one; 207. Screen barrel three; 208. Spiral scraper two; 209. Connecting cylinder; 210. Gear ring one; 211. Sealing retaining ring; 301. Crushing barrel; 302. Guide cylinder; 303. Connecting shaft; 304. Crushing shaft one; 305. Pentagonal frame; 306. Crushing shaft two; 307. Circular gear; 308. Fixing cylinder; 309. Gear ring two. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] This invention provides, for example Figure 1-8 The plastic pipe production waste recycling and processing device shown includes a recycling bin 101, a PCL control cabinet 102 installed on one side of the recycling bin 101, a cleaning tank 103 installed on the upper inner wall of the recycling bin 101, and the interior of the cleaning tank 103 is connected to the top of the recycling bin 101. Water pumps 104 are symmetrically installed at the lower interior of the recycling bin 101, and both sets of water pumps 104 are connected to the cleaning tank 103 by pipes. Both sets of water pumps 104 are electrically connected to the PCL control cabinet 102, and the two sets of water pumps 104 control the water inlet and outlet respectively. A screen barrel 1 201 is fixedly installed inside the cleaning tank 103. A screen barrel 204 is sleeved on the outside of the screen barrel 1 201, and the screen hole size of the screen barrel 2 204 is smaller than that of the screen hole size of the screen barrel 1 201. A screen barrel 3 207 is provided inside the screen barrel 1 201, and the screen hole size of the screen barrel 3 207 is larger than that of the screen hole size of the screen barrel 1 201.

[0027] The recycling bin 101 serves as the main support for the entire device, integrating all functional components and providing a closed working space to prevent the overflow of residual materials and cleaning water from polluting the environment. The PCL control cabinet 102 enables centralized automated control of the device, coordinating the operating parameters of components such as the water pump 104 and servo motor 203, improving operational convenience and stability. The cleaning tank 103 provides a dedicated space for cleaning residual materials; its connection to the top of the recycling bin 101 allows the crushed residual materials to directly enter the cleaning process, achieving continuous operation. Two sets of water pumps 104 control the inlet and outlet water respectively, enabling the recycling and timed replacement of cleaning water, conserving water resources while ensuring cleaning effectiveness. The three-tiered nested design of screens 201, 204, and 207, with screen aperture sizes sequentially larger (307 > 1 > 204), allows for precise grading and screening of the crushed residual materials, separating particles of different sizes for subsequent classification and reuse, improving the consistency of recycled material quality.

[0028] Furthermore, in the above structure, four sets of planetary gears 202 are rotatably mounted in a ring on the lower part of the inner wall of the first screen barrel 201. A servo motor 203 is installed at the bottom of the recycling box 101, and the output end of the servo motor 203 is shaft-connected to the second screen barrel 204. The servo motor 203 is also electrically connected to the PCL control cabinet 102. A sun gear 205 is fixedly shaft-connected to the inner wall of the second screen barrel 204, and the sun gear 205 is located inside the first screen barrel 201. The sun gear 205 meshes with the four sets of planetary gears 202.

[0029] A servo motor 203 serves as the core power source, providing stable power for the rotation of the second screen barrel 204. Its electrical connection with the PCL control cabinet 102 allows for precise adjustment of the rotation speed and direction, enabling flexible adjustment of cleaning and screening intensity based on different materials and levels of contamination in the residue. The sun gear 205 is fixedly shaft-connected to the second screen barrel 204 and rotates synchronously with it, driving the four sets of planetary gears 202 meshing with it. The circular distribution of the four sets of planetary gears 202 ensures more uniform and stable power transmission. With the screen barrel 201 fixed in position, the sun gear 205 can drive the four sets of planetary gears 202 to rotate at a fixed point during rotation.

[0030] Furthermore, in the above structure, spiral scrapers 206 are installed on both the inner and outer walls of the screen barrel 204, with the outer spiral scraper 206 fitting against the inner wall of the washing barrel 103 and the inner spiral scraper 206 fitting against the outer side of the screen barrel 201.

[0031] Spiral scrapers 206, installed on the inner and outer walls of screen barrel 204, rotate synchronously with screen barrel 204. The outer spiral scraper 206 scrapes away residual material and dirt adhering to the inner wall of washing barrel 103, while the inner spiral scraper 206 scrapes away residual material and dirt adhering to the outer side of screen barrel 201. This effectively prevents residual material from accumulating and clogging the screen holes, ensuring the continuous and stable operation of the screening and washing process. Simultaneously, the spiral structure of the spiral scraper 206 generates an upward conveying force on the residual material, causing it to continuously tumble within washing barrel 103. This increases the contact time and area between the residual material and the washing water, further improving the washing effect. Furthermore, it can convey the cleaned residual material upwards to the discharge position for easy subsequent collection.

[0032] Furthermore, in the above structure, spiral scrapers 208 are installed on both the inner and outer walls of the screen barrel 3 207, and the outer spiral scraper 208 is in contact with the inner wall of the screen barrel 1 201, and the spiral directions of the spiral scraper 208 and the spiral scraper 1 206 are opposite.

[0033] The spiral scrapers 208, installed on the inner and outer walls of screen barrel 3 207, rotate synchronously with screen barrel 3 207. The outer spiral scraper 208 can scrape off the residual material and dirt adhering to the inner wall of screen barrel 1 201, and the inner spiral scraper 208 can scrape off the residual material and dirt adhering to the inner wall of screen barrel 3 207, thus keeping the inner walls of each screen barrel clean and ensuring unobstructed screen holes. The design of spiral scraper 208 with opposite spiral directions to spiral scraper 1 206 ensures that during operation, screen barrel 3 207 and screen barrel 2 204 rotate in opposite directions, thus ensuring that spiral scraper 1 206 and spiral scraper 208 work in the same direction.

[0034] Furthermore, in the above structure, a connecting cylinder 209 is installed at the bottom of the screen barrel 207, and a gear ring 210 is installed on the inner wall of the connecting cylinder 209. The gear ring 210 meshes with four sets of planetary gears 202.

[0035] By meshing with the planetary gear 202, the rotational power of the planetary gear 202 can be transmitted to the connecting cylinder 209, thereby driving the screen barrel 207 to rotate. This transmission method has a compact structure and high transmission efficiency, and can realize differential rotation between the screen barrel 207 and the screen barrels 201 and 204. At the same time, due to the speed difference, the torque gradually increases.

[0036] Furthermore, in the above structure, sealing rings 211 are installed at the bottom of screen barrel 1 201, screen barrel 204 and screen barrel 3 207, and the sealing rings 211 of each group of components are in contact with the lower part of the inner wall of the corresponding component.

[0037] The sealing ring 211 forms a reliable sealing structure between each screen barrel, effectively preventing the leakage of washing water and fine residue from the gaps at the bottom of the screen barrel. This ensures that the washing and screening process takes place in a closed environment, avoiding any impact on the transmission of the sun gear 205, planetary gear 202, and gear ring 210. Simultaneously, the sealing ring 211 also provides support and guidance, ensuring the coaxiality and stability of each screen barrel during rotation.

[0038] Furthermore, in the above structure, a crushing barrel 301 is installed on the top of the recycling bin 101, and a guide cylinder 302 is installed below the crushing barrel 301. The guide cylinder 302 is located above the screen barrel 207, and the opening and closing of the guide cylinder 302 is connected to the bottom of the inner wall of the screen barrel 207. A connecting shaft 303 is installed, and the connecting shaft 303 extends through into the crushing barrel 301. The connecting shaft 303 passes through the center of the spiral scraper 208 on the inner side of the screen barrel 207.

[0039] The crushing chamber 301 provides a dedicated space for crushing plastic pipe waste, breaking down large pieces into granules suitable for subsequent cleaning and reuse. The guide cylinder 302 accurately and smoothly guides the crushed waste into the screen chamber 207, achieving seamless integration of the crushing and cleaning / screening processes and improving the overall efficiency of the device. The connecting shaft 303 directly transmits the rotational power of the screen chamber 207 to the crushing chamber 301, driving the crushing mechanism. This eliminates the need for a separate power source for the crushing process, simplifying the device structure and reducing manufacturing costs and energy consumption.

[0040] Furthermore, in the above structure, a crushing shaft 304 is sleeved and fixed on the connecting shaft 303, and a pentagonal frame 305 is sleeved and installed on the connecting shaft 303. Five sets of crushing shafts 306 are installed in a ring on the pentagonal frame 305, and the crushing shafts 306 mesh with the crushing shaft 304.

[0041] The first crushing shaft 304 rotates synchronously with the connecting shaft 303, serving as the drive shaft of the crushing mechanism and providing the main power for the crushing process. The pentagonal bracket 305 provides evenly distributed installation positions for the five sets of second crushing shafts 306, allowing the second crushing shafts 306 to surround the first crushing shaft 304. The five sets of second crushing shafts 306 mesh with the first crushing shaft 304, forming a multi-axis shearing and crushing structure. This structure can perform all-round shearing, squeezing, and grinding of the plastic pipe residue entering the crushing barrel 301, significantly improving crushing efficiency. It can crush the residue into particles of uniform size, creating favorable conditions for subsequent cleaning and reuse. At the same time, the increased torque of the connecting shaft 303 due to the power transmission below further enhances the power output of the crushing process.

[0042] Furthermore, in the above structure, a spur gear 307 is installed above each of the five sets of crushing shafts 306, a fixed cylinder 308 is installed on the top of the crushing barrel 301, and a gear ring 309 is installed on the inner wall of the fixed cylinder 308, and the gear ring 309 meshes with the corresponding spur gear 307 of each set.

[0043] The fixed cylinder 308 provides a fixed mounting base for the gear ring 309. When the connecting shaft 303 drives the pentagonal frame 305 and the second crushing shaft 306 to revolve around the first crushing shaft 304, the circular gear 307 mounted above the second crushing shaft 306 will roll on the fixed gear ring 309, thereby causing the second crushing shaft 306 to rotate. This planetary crushing structure allows the second crushing shaft 306 to rotate on its own axis while revolving around the central axis, greatly increasing the contact area and frequency between the crushing shaft and the residue. This enables faster and more thorough crushing of plastic pipe residues of various shapes and hardnesses, further improving crushing quality and efficiency, and making the particle size of the recycled material more uniform.

[0044] A method for recycling waste materials from plastic pipe production, employing the waste material recycling and processing device described above, includes the following steps: Step 1: Start the inlet water pump 104 via the PCL control cabinet 102 to inject an appropriate amount of cleaning water into the cleaning tank 103 to the specified level. Based on the material, degree of contamination, and processing volume of the residue to be treated, preset the servo motor 203 speed, water pump 104 operating cycle, and total processing time parameters on the PCL control cabinet 102.

[0045] Step 2: Press the start button on the PCL control cabinet 102, and the servo motor 203 and the two sets of water pumps 104 will start running simultaneously. The servo motor 203 drives the screen barrel 204, screen barrel 3 207 and the crushing mechanism above to operate synchronously through the planetary gear transmission system, forming a circulating cleaning water flow and a differential screening environment.

[0046] Step 3: Slowly and evenly feed the large pieces of plastic pipe scrap to be recycled into the crushing bin 301. Under the action of the planetary crushing structure formed by the first crushing shaft 304 and the five sets of second crushing shafts 306, the scrap is sheared, squeezed and ground into particles with uniform particle size.

[0047] Step 4: The crushed particles fall into the screen barrel 207 through the guide cylinder 302. Under the differential rotation of the screen barrel 204 and the screen barrel 207, particles of different sizes are automatically classified and screened through the three-stage nested screen barrels. At the same time, under the action of the spiral scraper 1 206 and the spiral scraper 2 208, they are continuously tumbled up and down in the washing water to complete the cleaning of surface oil and impurities.

[0048] Step 5: The cleaned residual materials of different particle sizes are continuously conveyed upwards by the spiral scraper to the top discharge port of their respective screen barrels. Collection containers are placed below each discharge port to collect the recycled plastic granules of different particle sizes, which can be directly used for the reprocessing of plastic pipes of different specifications.

[0049] like Figure 1-8 As shown, when the device is started, the PCL control cabinet 102 simultaneously controls the servo motor 203 and two sets of water pumps 104. The output shaft of the servo motor 203 directly drives the second screen barrel 204 and the sun gear 205 fixed on its inner wall to rotate synchronously. Since the first screen barrel 201 is in a fixed position, when the sun gear 205 rotates, it drives the four sets of planetary gears 202 meshing with it to rotate at a fixed point below the inner wall of the first screen barrel 201. The four sets of planetary gears 202 simultaneously mesh with the gear ring 210 on the inner wall of the connecting cylinder 209, transmitting power to the connecting cylinder 209, which in turn drives the third screen barrel 207 to rotate. Through the planetary transmission of the sun gear 205, planetary gears 202 and gear ring 210, the differential reverse rotation of the second screen barrel 204 and the third screen barrel 207 is realized, and by utilizing the torque amplification characteristics of the planetary gear system, the connecting shaft 303 obtains a larger torque output.

[0050] When the sieve barrel 3 207 rotates, it drives the connecting shaft 303 fixed to the lower part of its inner wall to rotate synchronously. The connecting shaft 303 extends upward into the crushing barrel 301, driving the crushing shaft 304 and the pentagonal frame 305, which are sleeved and fixed, to rotate. The pentagonal frame 305 drives the five sets of crushing shafts 306 to revolve around the crushing shaft 304. At the same time, because the circular gear 307 above the crushing shaft 306 meshes with the toothed ring 309 on the inner wall of the fixed cylinder 308, the crushing shaft 306 generates a high-speed rotation while revolving. This planetary crushing structure with revolution and rotation, through the mutual meshing of the crushing shaft 304 and the five sets of crushing shafts 306, performs all-round shearing, extrusion and grinding on the large pieces of plastic pipe residue put into the crushing barrel 301, crushing them into particles with uniform particle size.

[0051] The crushed residue falls accurately into the screen barrel 207 via the guide cylinder 302 below the crushing barrel 301. Because the screen barrels 207, 201, and 204 are nested in a three-tiered design with screen aperture sizes in descending order (screen barrel 207 > screen barrel 201 > screen barrel 204), the residue is automatically graded and screened under the differential rotation of screen barrels 207 and 204, allowing plastic particles of different sizes to be separated into their corresponding layers. During the screening process, two sets of water pumps 104 inject and discharge cleaning water into the cleaning barrel 103, forming a circulating cleaning system. The spiral scrapers 206 on the inner and outer walls of screen barrel 204 and 208 on the inner and outer walls of screen barrel 207 rotate synchronously with their respective screen barrels. Since the spiral scraper 1 206 and spiral scraper 208 rotate in opposite directions, and the screen barrel 2 204 and screen barrel 3 207 rotate in opposite directions, their material conveying directions are consistent, both generating an upward conveying force on the residual material. During rotation, spiral scraper 1 206 and spiral scraper 208 continuously scrape off the residual material and dirt adhering to the inner wall of cleaning barrel 103, the inner and outer walls of screen barrel 1 201, and the inner wall of screen barrel 3 207, effectively preventing screen hole blockage. On the other hand, they cause the residual material to continuously tumble up and down in the cleaning water, greatly increasing the contact time and contact area between the residual material and the cleaning water, thoroughly removing oil, dust, and other impurities from the surface of the residual material.

[0052] Finally, the cleaned residue of different particle sizes is continuously conveyed upwards by the spiral scraper to the top discharge port of each screen bucket as the internal cleaning water level decreases. It can then be collected separately and directly used for the reprocessing of plastic pipes of different specifications. The PCL control cabinet 102 can precisely adjust the speed of the servo motor 203 and the operating cycle of the water pump 104 according to the material, contamination level, and processing volume of the residue to achieve the best recycling effect.

[0053] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A recycling and processing device for waste materials from plastic pipe production, comprising a recycling bin (101), a PCL control cabinet (102) installed on one side of the recycling bin (101), a cleaning tank (103) installed on the upper inner wall of the recycling bin (101), the interior of the cleaning tank (103) being connected to the top of the recycling bin (101), and water pumps (104) symmetrically installed at the lower interior of the recycling bin (101), both sets of water pumps (104) being connected to the cleaning tank (103) via pipes, and both sets of water pumps (104) being electrically connected to the PCL control cabinet (102), and the two sets of water pumps (104) controlling the inlet and outlet of water respectively, characterized in that: The cleaning tank (103) is fixedly installed with a sieve bucket one (201) inside. A sieve bucket two (204) is sleeved on the outside of the sieve bucket one (201), and the sieve hole size of the sieve bucket two (204) is smaller than the sieve hole size of the sieve bucket one (201). A sieve bucket three (207) is provided inside the sieve bucket one (201), and the sieve hole size of the sieve bucket three (207) is larger than the sieve hole size of the sieve bucket one (201).

2. The excess material recycling processing apparatus for plastic pipe production according to claim 1, characterized in that: Four sets of planetary gears (202) are rotatably mounted in a ring on the lower inner wall of the first sieve barrel (201). A servo motor (203) is installed at the bottom of the recycling box (101), and the output end of the servo motor (203) is shaft-connected to the second sieve barrel (204). The servo motor (203) is electrically connected to the PCL control cabinet (102). A sun gear (205) is fixedly shaft-connected to the inner wall of the second sieve barrel (204), and the sun gear (205) is located inside the first sieve barrel (201). The sun gear (205) meshes with the four sets of planetary gears (202).

3. The excess material recycling processing apparatus for plastic pipe production according to claim 2, characterized in that: Spiral scrapers (206) are installed on both the inner and outer walls of the second sieve barrel (204), with the outer spiral scraper (206) fitting against the inner wall of the washing barrel (103) and the inner spiral scraper (206) fitting against the outer side of the first sieve barrel (201).

4. The excess material recycling treatment device for plastic pipe production according to claim 1, characterized in that: Spiral scrapers 2 (208) are installed on both the inner and outer walls of the three-screen barrel (207), and the outer spiral scraper 2 (208) is in contact with the inner wall of the one-screen barrel (201), and the spiral directions of the spiral scraper 2 (208) and the spiral scraper 1 (206) are opposite.

5. The waste material recycling and processing device for plastic pipe production according to claim 4, characterized in that: The bottom of the three sieve barrels (207) is equipped with a connecting cylinder (209), and a gear ring (210) is installed on the inner wall of the connecting cylinder (209), and the gear ring (210) meshes with four sets of planetary gears (202).

6. The waste material recycling and processing device for plastic pipe production according to claim 1, characterized in that: The bottom of each of the three sieve barrels (201, 204, and 307) is equipped with a sealing ring (211), and the sealing ring (211) of each group of components is in contact with the lower part of the inner wall of the corresponding component.

7. The recycling and processing device for waste materials from plastic pipe production according to claim 1, characterized in that: The recycling bin (101) is equipped with a crushing barrel (301) on top, and a guide cylinder (302) is installed below the crushing barrel (301). The guide cylinder (302) is located above the screen barrel three (207). A connecting shaft (303) is installed below the inner wall of the screen barrel three (207). The connecting shaft (303) extends through into the crushing barrel (301) and passes through the center of the spiral scraper two (208) on the inner side of the screen barrel three (207).

8. The waste material recycling and processing device for plastic pipe production according to claim 7, characterized in that: A crushing shaft (304) is fixedly sleeved on the connecting shaft (303). A pentagonal frame (305) is sleeved on the connecting shaft (303). Five sets of crushing shafts (306) are installed in a ring on the pentagonal frame (305), and the crushing shafts (306) are all meshed with the crushing shaft (304).

9. The waste material recycling and processing device for plastic pipe production according to claim 8, characterized in that: Each of the five sets of crushing shafts (306) is equipped with a spur gear (307), and a fixed cylinder (308) is installed on the top of the crushing barrel (301). A toothed ring (309) is installed on the inner wall of the fixed cylinder (308), and the toothed ring (309) meshes with the corresponding spur gear (307) of each set.

10. A method for recycling waste materials from plastic pipe production, comprising the plastic pipe production waste material recycling and processing device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Start the inlet water pump (104) through the PCL control cabinet (102) to inject an appropriate amount of cleaning water into the cleaning tank (103) to the specified level. Based on the material, degree of contamination and processing volume of the waste material to be processed, preset the servo motor (203) speed, water pump (104) operating cycle and total processing time parameters on the PCL control cabinet (102); S2: Press the start button on the PCL control cabinet (102), and the servo motor (203) and two sets of water pumps (104) will start running simultaneously. The servo motor (203) drives the second screen barrel (204), the third screen barrel (207) and the crushing mechanism above to operate synchronously through the planetary gear transmission system, forming a circulating cleaning water flow and a differential screening environment; S3: The large pieces of plastic pipe scrap to be recycled are slowly and evenly fed into the crushing bucket (301). Under the action of the planetary crushing structure formed by the first crushing shaft (304) and the five sets of second crushing shafts (306), the scrap is sheared, squeezed and ground into particles with uniform particle size; S4: The crushed particles fall into the third screen barrel (207) through the guide cylinder (302). Under the differential rotation of the second screen barrel (204) and the third screen barrel (207), particles of different sizes are automatically classified and screened through the three-stage nested screen barrels. At the same time, under the action of the first spiral scraper (206) and the second spiral scraper (208), they are constantly turned up and down in the washing water to complete the cleaning of surface oil and impurities. S5: The cleaned residual materials of different particle sizes are continuously conveyed upwards by the spiral scraper to the top discharge port of their respective screen barrels. Collection containers are placed below each discharge port to collect recycled plastic granules of different particle sizes, which can be directly used for the reprocessing of plastic pipes of different specifications.

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