Pipe machining equipment and machining process for plastic waste recovery

Abstract

The invention relates to a pipe machining device and technology for plastic waste recovery, and relates to the technical field of plastic waste recovery machining, the pipe machining device comprises an extruder body and a machining assembly, and the machining assembly comprises a cooling part and an expansion part; the cooling piece comprises a cooling cylinder and a heat conduction cylinder; the expansion piece comprises an air pump II and an air bag II; the cooling cylinder is in a hollow circular truncated cone shape, the cooling cylinder is used for storing dry ice, the cooling cylinder is arranged on one side of the extruder body, and the heat conduction cylinder is fixed in the cooling cylinder; one end, with the smallest diameter, of the outer ring of the cooling cylinder faces the extruder body; the second air pump and the second air bag are fixed to the outer ring and the inner ring of the cooling cylinder respectively. And the distribution of dry ice can be gradually changed from less to more. The device ensures that the just extruded high-temperature pipe firstly contacts with a small amount of dry ice to be lightly cooled and then gradually enters a low-temperature area, the problem that the outer surface layer of the pipe is hardened and the inner layer is still high in temperature due to instant cooling is avoided, thermal stress is effectively reduced through gradual cooling, and warping, deformation or surface cracks of the pipe are prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic waste recycling and processing, and particularly relates to a pipe processing equipment for plastic waste recycling and a processing technology. BACKGROUND

[0002] With the increasing environmental awareness and the increasing demand for resource recycling, recycling plastic waste into pipe material has become an important industrial production method. Plastic pipes are widely used in construction, municipal, agricultural and other industries, but there are many technical challenges in the processing process, especially the improper control of the cooling link which can easily lead to product quality problems.

[0003] Nanometer silver ion antibacterial pipe is a plastic pipe with nanometer silver ions added to the inner wall, which aims to inhibit the growth of bacteria and microorganisms in the pipe, thereby maintaining the cleanliness of water quality. The plastic masterbatch for producing nanometer silver ion antibacterial pipe is heated and melted by an extruder and then extruded into a pipe material, but the just-formed pipe material has a high temperature and a soft material, and if the cooling process is insufficient or uneven, it is easy to deform, warp or have surface defects, thereby significantly reducing the yield and increasing the production cost.

[0004] In the prior art, to solve the pipe cooling problem, a cooling box or cooling sleeve is often used to forcibly cool the extruded pipe. Among them, dry ice (solid carbon dioxide) is widely used in cooling systems due to its extremely low temperature (-78.5°C) and sublimation heat absorption characteristics. For example, by sleeving a ring-shaped cooling box outside the pipe and filling it with dry ice, the temperature of the pipe material can be quickly reduced. However, this method has obvious limitations: first, if the high-temperature pipe just extruded from the mold immediately enters an extremely low-temperature environment, the outer layer will instantly shrink and harden, while the inner layer is still in a high-temperature molten state. This uneven thermal shrinkage will generate a huge thermal stress inside the pipe, causing the pipe to warp, deform, and even have surface cracks, which seriously affects the mechanical properties and service life of the pipe. Secondly, dry ice itself is in irregular block or granular shape, which is easy to be stuck in narrow spaces or unevenly stacked when entering the ring-shaped cooling box, causing the cooling channel to be blocked; at the same time, the gap between the dry ice is large, which may cause unstable cooling efficiency, local overcooling or insufficient cooling, and cannot achieve uniform cooling.

[0005] Therefore, there is an urgent need for a pipe processing equipment that can achieve gradual and controllable cooling to overcome the defects of the prior art and improve the yield and economy of plastic waste recycling pipe material. SUMMARY

[0006] This invention addresses the technical problems existing in the prior art by providing a pipe processing equipment and process for recycling plastic waste. It solves the problem that in the prior art, if a high-temperature pipe immediately extruded from the mold is placed in an extremely low-temperature environment, its outer layer will instantly shrink and harden, while the inner layer remains in a high-temperature molten state. This uneven thermal shrinkage generates enormous thermal stress inside the pipe, causing warping, deformation, and even surface cracks, severely affecting the pipe's mechanical properties and service life. Secondly, dry ice itself is irregularly shaped or granular, which can easily get stuck in narrow spaces or accumulate unevenly when entering the annular cooling chamber, causing blockages in the cooling channels. Simultaneously, the large gaps between dry ice particles can lead to unstable cooling efficiency, with some areas being overcooled or undercooled, failing to achieve uniform cooling. This invention achieves a gradual increase in dry ice distribution by designing the cooling cylinder as a frustum shape and having the end with the smaller outer diameter facing the extruder body. This design ensures that the freshly extruded high-temperature tubing first undergoes a light cooling process with a small amount of dry ice before gradually entering the low-temperature zone. This avoids the problem of the outer layer of the tubing hardening while the inner layer remains hot due to instantaneous cooling. Gradual cooling effectively reduces thermal stress, preventing tubing warping, deformation, or surface cracking, and improving the yield rate. The second air bladder in the expansion component is connected to the second air pump, allowing for intermittent expansion to resist and clear any dry ice blockages in the cooling cylinder. This solves the problem of dry ice easily getting stuck due to its irregular shape, ensuring uniform distribution of dry ice, maintaining stable cooling efficiency, and reducing the need for manual intervention.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a pipe processing equipment for recycling plastic waste, comprising an extruder body and a processing component, wherein the processing component includes a cooling component and an expansion component; The cooling components include a cooling cylinder and a heat-conducting cylinder; the expansion components include a second air pump and a second airbag. The cooling cylinder is a hollow frustum shape. It is used to store dry ice and is located on one side of the extruder body. The heat conduction cylinder is fixed inside the cooling cylinder. The end with the smallest outer diameter of the cooling cylinder faces the extruder body; Air pump two and air bag two are fixed to the outer ring and inner ring of the cooling cylinder, respectively, and air pump two and air bag two are connected. The airbag expands to push against and clear the dry ice blockage inside the cooling cylinder.

[0008] As an improvement, the axis of the cooling cylinder is parallel to the ground; The heat-conducting cylinder is a cylindrical shape that runs through its axis, and the axis of the heat-conducting cylinder and the axis of the cooling cylinder are located on the same straight line. The cooling component also includes mounting ports. Mounting ports are opened at both ends of the cooling cylinder. The mounting ports are cylindrical, and the axis of the mounting ports is on the same straight line as the axis of the cooling cylinder. The two ends of the heat conduction cylinder are installed in the mounting ports at both ends of the cooling cylinder. The heat-conducting cylinder is connected to the output end of the extruder body.

[0009] As an improvement, the second airbag is ring-shaped, and the axis of the second airbag is on the same straight line as the axis of the heat-conducting cylinder; The second airbag is made of silicone rubber.

[0010] As an improvement, the machining components also include machined parts; The processed components include a processing box, a drying fan, a discharge port 1, a partition, a discharge port 2, a ventilation screen, a mounting plate, support legs, and a positioning port; The processing box is a hollow cuboid shape and is located on one side of the extruder body. A positioning port is opened on one side of the processing box. The end with the smallest diameter of the outer ring of the cooling cylinder is fixed to the positioning port; A fixed partition is installed inside the processing box, and two discharge ports are opened on the side of the partition. A discharge port is opened on the side of the processing box away from the positioning port, and a drying fan and a ventilation screen are installed on the upper and lower sides of the processing box, respectively; The drying fan, discharge port 2, and ventilation screen are all located on the side of the partition away from the cooling cylinder; A mounting plate is fixed to the side of the processing box away from the extruder body, and support legs are fixed to the lower side of the processing box and the mounting plate.

[0011] As an improvement, the processing assembly also includes an export component, which includes telescopic rod one, telescopic rod two, sleeve, airbag one, and air pump one; Telescopic rod one is fixed to the mounting plate, and telescopic rod two is fixed to the output end of telescopic rod one. The telescopic direction of telescopic rod one is perpendicular to the ground, and the telescopic direction of telescopic rod two is parallel to the ground. Telescopic pole one and telescopic pole two are electric telescopic poles; The sleeve is a cylindrical shape that runs through its axis. The sleeve is fixed at the output end of the telescopic rod two, and the axis of the sleeve and the telescopic rod two are on the same straight line. The airbag is ring-shaped and fixed to the outer ring of the sleeve. The air pump is fixed to the inner ring of the sleeve, and the output end of the air pump is connected to the airbag. The airbag is made of silicone rubber. After the sleeve is inserted into the formed pipe, the air bladder inflates and presses against the inner wall of the pipe, assisting in pulling the pipe out.

[0012] As an improvement, the cooling components also include a discharge port, a guide tube, a storage tube, a cover plate, an extension tube, and an exhaust pipe; A discharge port is opened on the cooling cylinder, and a guide cylinder is installed on the cooling cylinder and connected to the discharge port. The upper end of the guide cylinder extends through the processing box to the outside. The storage cylinder is fixed to the guide cylinder and has a cover plate. The storage cylinder is used to store dry ice, and the guide cylinder is used to store and transport dry ice. The extension cylinder is a cylindrical shape that runs through its axis. The axis of the extension cylinder and the axis of the heat-conducting cylinder are on the same straight line. One end of the extension cylinder is fixed to the end of the heat-conducting cylinder away from the extruder body, and the other end of the extension cylinder away from the heat-conducting cylinder is fixed inside the discharge port 2. The exhaust pipe is fixed to one side of the cooling cylinder and communicates with the inside of the cooling cylinder. The lower end of the exhaust pipe passes through the processing box and is connected to the carbon dioxide collector.

[0013] As an improvement, both the cooling cylinder and the extension cylinder are made of heat-insulating material to prevent the dry ice energy inside the cooling cylinder from leaking out.

[0014] As an improvement, the processing components also include deformable parts; Deformable components include a tensile membrane, an iron ball, a cover ring, a mounting groove, and an electromagnet; The stretch membrane is annular and is fitted over the heat-conducting cylinder. Both ends of the stretch membrane are fixed to the outer ring of the heat-conducting cylinder. There are multiple iron balls, which are evenly spaced inside the stretch membrane. The stretch membrane is made of silicone rubber. The cover ring is a frustum-shaped cylinder with its axis running through it. The axis of the cover ring and the axis of the cooling cylinder are on the same straight line. The end with the smallest diameter of the outer ring of the cover ring is fixed inside the machining box. The cooling cylinder is located inside the cover ring. An installation groove is opened on the cover ring, and the guide cylinder is located inside the installation groove. There are multiple electromagnets, which are evenly spaced inside the cover ring.

[0015] As an improvement, the processing components also include fasteners, which include a positioning membrane and a pull cord; The expansion components also include an expansion diaphragm, an air pump (number three), an air supply line (number one), and an air supply line (number two); The expansion film is annular, with both ends fixed to the outer ring of the heat-conducting cylinder, and the expansion film is located inside the tension film; An expansion cavity is formed between the expansion film and the heat-conducting cylinder; The air pump is fixed to one side of the cooling cylinder; A gas supply line 1 is opened inside the heat-conducting cylinder, and a gas supply line 2 is opened inside the cooling cylinder. The gas supply line 1 and the gas supply line 2 are connected. The gas supply line 1 is connected to the expansion cavity formed by the expansion film and the heat-conducting cylinder, and the gas supply line 2 is connected to the output end of the air pump 3. The positioning film is ring-shaped and located inside the expansion cavity formed by the expansion film and the heat-conducting cylinder. The positioning film is sleeved on the outside of the heat-conducting cylinder, and both ends of the positioning film are fixed to the outer ring of the heat-conducting cylinder. The positioning membrane and the expansion membrane form a storage cavity, and the electrorheological fluid is stored in the storage cavity formed by the positioning membrane and the expansion membrane. Two electrode plates are placed between the positioning membrane and the expansion membrane. The electrode plates are in contact with the electrorheological fluid filling the space between the positioning membrane and the expansion membrane. The electrode plates are connected to the power supply. There are multiple pull ropes, which are located in the storage cavity formed by the positioning film and the expansion film. The two ends of the pull ropes are fixed to the positioning film and the expansion film respectively. The axis of the expansion film and the axis of the heat-conducting cylinder are on the same straight line; Both the pull rope and the expansion membrane are made of silicone rubber.

[0016] A processing technology for pipes used in plastic waste recycling includes the following steps: S1: Before pipe forming, add dry ice into the storage cylinder. The dry ice enters the cooling cylinder through the guide cylinder and is evenly distributed in the cooling cylinder. S2: By intermittently controlling the expansion of the second airbag, the dry ice stuck in the cooling cylinder is resisted, the blockage is cleared, and the dry ice can be spread throughout the cooling cylinder. S3: The pipe formed by extrusion through the extruder body enters the heat conduction cylinder, and the dry ice stored in the cooling cylinder cools the pipe body. The carbon dioxide produced by the sublimation of the dry ice is discharged through the exhaust pipe. S4: When the pipe is first extruded and it is necessary to guide the pipe out of the processing box, telescopic rod one and telescopic rod two work to send the sleeve into the heat-conducting cylinder and into the pipe. Then, through the expansion of air bag one, it comes into contact with the inner wall of the pipe, and through the retraction of telescopic rod two, the pipe is guided out of the processing box. S5: During the pipeline transportation process, the start of the drying fan blows air through the pipeline to dry the moisture adhering to the outer wall of the pipeline. The air blown in by the drying fan can be discharged through the ventilation net.

[0017] The beneficial effects of this invention are as follows: Firstly, by designing the cooling cylinder as a frustum shape and having the end with the smaller outer diameter facing the extruder body, a gradual increase in dry ice distribution is achieved. This ensures that the newly extruded high-temperature pipe first comes into contact with a small amount of dry ice for mild cooling before gradually entering the low-temperature region, avoiding the problem of the outer surface of the pipe hardening while the inner layer remains hot due to instantaneous cooling. Gradual cooling effectively reduces thermal stress, preventing pipe warping, deformation, or surface cracking, and improving the yield. Secondly, the air bladder in the expansion component is connected to the air pump, allowing for intermittent expansion to resist and clear any dry ice blockages in the cooling cylinder. This solves the problem of dry ice easily getting stuck due to its irregular shape, ensuring uniform distribution of dry ice, maintaining stable cooling efficiency, and reducing the need for manual intervention.

[0018] Secondly, by intermittently activating electromagnets at different locations, iron balls are attracted and the stretched membrane is deformed, thereby shaking off or peeling off the dry ice adhering to the outer surface of the heat-conducting cylinder. This prevents dry ice from clumping and blocking the cooling channels, ensuring that the dry ice flows freely within the cooling cylinder and maintaining the stability and consistency of the cooling effect. It also avoids localized overcooling or undercooling caused by uneven distribution of dry ice.

[0019] Thirdly, the equipment can dynamically adjust the cooling intensity according to the pipe wall thickness and material properties. The degree of expansion of the expansion film controls the size of the insulation cavity: the greater the expansion, the stronger the insulation effect and the slower the cooling rate; conversely, the cooling is faster. This solves the problem of thin-walled pipes being prone to overcooling and cracking or thick-walled pipes being insufficiently cooled, achieving customized cooling. This allows the same equipment to process pipes of various specifications, reducing the need to change molds or cooling devices and lowering production costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional sectional view of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a perspective view of the cooling component of the present invention; Figure 4 This is a three-dimensional cross-sectional view of the cooling component of the present invention. Figure 1 ; Figure 5 This is a three-dimensional cross-sectional view of the cooling component of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the installation of the air pump of the present invention; Figure 7 This is a schematic diagram of the installation of the tension membrane of the present invention; Figure 8 This is a schematic diagram of the iron ball installation according to the present invention; Figure 9 This is a schematic diagram of the installation of the cover ring of the present invention; Figure 10 This is a schematic diagram of the electromagnet installation of the present invention; Figure 11 This is a schematic diagram of the installation of the expansion membrane of the present invention; Figure 12 For the present invention Figure 11 Enlarged view of the structure at point A inside; Figure 13 This is a schematic diagram of the installation of the pull rope of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: 100. Extruder body; 200. Processing components; 210. Processed parts; 211. Processing box; 212. Drying fan; 213. Discharge port one; 214. Baffle plate; 215. Discharge port two; 216. Ventilation screen; 217. Mounting plate; 218. Support leg; 219. Positioning port; 220. Guide part; 221. Telescopic rod one; 222. Telescopic rod two; 223. Sleeve; 224. Airbag one; 225. Air pump one; 230. Cooling components; 231. Cooling cylinder; 232. Mounting port; 233. Lower part. 234. Feed inlet, 235. Guide cylinder, 236. Storage cylinder, 237. Cover plate, 238. Heat conduction cylinder, 239. Extension cylinder, 240. Exhaust pipe, 241. Expansion component, 242. Air pump two, 243. Airbag two, 244. Expansion membrane, 245. Air supply line one, 246. Air supply line two, 250. Deformation component, 251. Tension membrane, 252. Iron ball, 253. Cover ring, 254. Mounting groove, 255. Electromagnet, 260. Fixing component, 261. Positioning membrane, 262. Pull rope. Detailed Implementation

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

[0023] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0025] Example 1: As Figures 1-6 As shown, this application discloses a pipe processing equipment for recycling plastic waste, including an extruder body 100 and a processing component 200. The processing component 200 includes a cooling component 230 and an expansion component 240. The cooling component 230 includes a cooling cylinder 231, an installation port 232, a discharge port 233, a guide cylinder 234, a storage cylinder 235, a cover plate 236, a heat conduction cylinder 237, an extension cylinder 238, and an exhaust pipe 239. The expansion component 240 includes an air pump 241 and an airbag 242; The cooling cylinder 231 is a hollow frustum shape, and the axis of the cooling cylinder 231 is parallel to the ground. Cooling cylinder 231 is used to store dry ice. Cooling cylinder 231 is located on one side of extruder body 100. Heat conduction cylinder 237 is fixed inside cooling cylinder 231. The heat-conducting cylinder 237 is a cylindrical shape that runs through its axis, and the axis of the heat-conducting cylinder 237 and the axis of the cooling cylinder 231 are located on the same straight line. Both the cooling cylinder 231 and the extension cylinder 238 are made of heat-insulating material to prevent the dry ice energy inside the cooling cylinder 231 from leaking out.

[0026] Specifically, before the pipe is formed, dry ice is added into the cooling cylinder 231 and evenly distributed inside the cooling cylinder 231. This first lowers the temperature of the heat-conducting cylinder 237, which facilitates the cooling of the pipe after it is formed.

[0027] The cooling cylinder 231 has mounting ports 232 at both ends. The mounting ports 232 are cylindrical and the axis of the mounting ports 232 is on the same straight line as the axis of the cooling cylinder 231. The heat conduction cylinder 237 is installed in the mounting ports 232 at both ends of the cooling cylinder 231. The heat-conducting cylinder 237 is connected to the output end of the extruder body 100.

[0028] The end of the cooling cylinder 231 with the smallest outer diameter faces the extruder body 100; Specifically, the end with the smallest outer diameter of the cooling cylinder 231 faces the extruder body 100, so that the amount of dry ice stored in the cooling cylinder 231 gradually increases as it moves away from the extruder body 100; this causes the temperature of the extruded pipe to decrease gradually, rather than decreasing instantly; this avoids the pipe entering an extremely low temperature environment immediately after being extruded, which would cause its outer layer to shrink and harden instantly while the inner layer remains at a high temperature, generating huge thermal stress inside the pipe, leading to warping, deformation, or even surface cracks.

[0029] Air pump 241 and air bag 242 are fixed to the outer ring and inner ring of cooling cylinder 231, respectively, and air pump 241 and air bag 242 are connected. Airbag 242 is annular, and the axis of airbag 242 is on the same straight line as the axis of heat conduction cylinder 237; Airbag 242 is made of silicone rubber.

[0030] The airbag 242 expands, resisting and clearing the dry ice blockage inside the cooling cylinder 231.

[0031] Specifically, when dry ice enters the cooling cylinder 231, the expansion of the second airbag 242 is controlled intermittently to resist the dry ice stuck in the cooling cylinder 231, clear the blockage, and allow the dry ice to fill the cooling cylinder 231. The processing assembly 200 also includes a processing component 210 and an output component 220; The processing component 210 includes a processing box 211, a drying fan 212, a discharge port 1 213, a partition 214, a discharge port 215, a ventilation net 216, a mounting plate 217, a support leg 218, and a positioning port 219; The processing box 211 is a hollow cuboid and is located on one side of the extruder body 100. A positioning port 219 is opened on one side of the processing box 211. The end of the outer ring of the cooling cylinder 231 with the smallest diameter is fixed to the positioning port 219; The processing box 211 has a fixed partition 214 inside, and a discharge port 215 is opened on the side of the partition 214. A discharge port 213 is opened on the side of the processing box 211 away from the positioning port 219. A drying fan 212 and a ventilation net 216 are respectively installed on the upper and lower sides of the processing box 211. The drying fan 212, the discharge port 215 and the ventilation screen 216 are all located on the side of the partition 214 away from the cooling cylinder 231; A mounting plate 217 is fixed to the side of the processing box 211 away from the extruder body 100, and a support leg 218 is fixed to the lower side of the processing box 211 and the mounting plate 217.

[0032] Specifically, during the cooling and transportation process, the drying fan 212 is activated to blow air onto the pipeline to dry the moisture adhering to the outer wall of the pipeline. The air blown in by the drying fan 212 can be discharged through the ventilation net 216.

[0033] The extension component 220 includes a telescopic rod 221, a telescopic rod 222, a sleeve 223, an airbag 224, and an air pump 225; Telescopic rod 1 221 is fixed on mounting plate 217, and telescopic rod 222 is fixed on the output end of telescopic rod 1 221. The telescopic direction of telescopic rod 1 221 is perpendicular to the ground, and the telescopic direction of telescopic rod 222 is parallel to the ground. The sleeve 223 is a cylindrical shape that runs through its axis. The sleeve 223 is fixed to the output end of the telescopic rod 222. The axis of the sleeve 223 and the telescopic rod 222 are on the same straight line. Airbag 224 is annular and fixed to the outer ring of sleeve 223. Air pump 225 is fixed to the inner ring of sleeve 223 and the output end of air pump 225 is connected to airbag 224. Airbag 1224 is made of silicone rubber; After the sleeve 223 is inserted into the formed pipe, the air bladder 224 inflates, presses against the inner wall of the pipe, and assists in pulling the pipe out.

[0034] Specifically, when the pipe is first extruded from the extruder body 100, the sleeve 223 is sent into the heat-conducting cylinder 237 and into the pipe through the operation of telescopic rod 1 221 and telescopic rod 222. Then, the expansion of airbag 1 224 causes it to contact the inner wall of the pipe, and the retraction of telescopic rod 222 guides the pipe out of the processing box 211. A discharge port 233 is provided on the cooling cylinder 231, and a guide cylinder 234 is installed on the cooling cylinder 231 and communicates with the discharge port 233. The upper end of the guide cylinder 234 extends outward through the processing box 211. The storage cylinder 235 is fixed on the guide cylinder 234. The storage cylinder 235 is equipped with a cover plate 236. The storage cylinder 235 is used to store dry ice, and the guide cylinder 234 is used to store and transport dry ice. The extension cylinder 238 is a cylindrical shape that runs through its axis. The axis of the extension cylinder 238 is on the same straight line as the axis of the heat-conducting cylinder 237. One end of the extension cylinder 238 is fixed to the end of the heat-conducting cylinder 237 away from the extruder body 100, and the other end of the extension cylinder 238 away from the heat-conducting cylinder 237 is fixed inside the discharge port 215. The exhaust pipe 239 is fixed to one side of the cooling cylinder 231 and communicates with the interior of the cooling cylinder 231. The lower end of the exhaust pipe 239 passes through the processing box 211 and is connected to the carbon dioxide collector.

[0035] Specifically, before the pipe is formed, dry ice is added to the storage cylinder 235. The dry ice enters the cooling cylinder 231 through the guide cylinder 234 and is evenly distributed in the cooling cylinder 231. The carbon dioxide produced after the dry ice sublimates is discharged through the exhaust pipe 239.

[0036] Telescopic pole 1 (221) and telescopic pole 2 (222) are electric telescopic poles; The extruder body 100, telescopic rod one 221 and telescopic rod two 222 are existing technologies and will not be described in detail here.

[0037] A processing technology for pipes used in plastic waste recycling, employing the aforementioned apparatus, includes the following steps: S1: Before pipe forming, dry ice is added to the storage cylinder 235. The dry ice enters the cooling cylinder 231 through the guide cylinder 234 and is evenly distributed in the cooling cylinder 231. S2: By intermittently controlling the expansion of the second airbag 242, the dry ice stuck in the cooling cylinder 231 is resisted, the blockage is cleared, and the dry ice can be spread throughout the cooling cylinder 231. S3: The pipe formed by extrusion through the extruder body 100 enters the heat conduction cylinder 237. The dry ice stored in the cooling cylinder 231 cools and lowers the temperature of the pipe body. The carbon dioxide produced by the sublimation of the dry ice is discharged through the exhaust pipe 239. S4: When the pipe is first extruded and it is necessary to guide the pipe out of the processing box 211, telescopic rod 1 221 and telescopic rod 222 work to send the sleeve 223 into the heat-conducting cylinder 237 and into the pipe. Then, through the expansion of airbag 1 224, it abuts against the inner wall of the pipe. Through the retraction of telescopic rod 222, the pipe is guided out of the processing box 211. S5: During the pipeline transportation process, the start of the drying fan 212 blows air into the pipeline to dry the moisture attached to the outer wall of the pipeline. The air blown in by the drying fan 212 can be discharged through the ventilation net 216.

[0038] The silicone rubber airbags 242 and 224 can maintain good elasticity even under the influence of low temperatures from dry ice, ensuring the normal operation of the device.

[0039] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: By designing the cooling cylinder 231 as a frustum shape and positioning the smaller diameter end of the outer ring towards the extruder body 100, a gradual increase in dry ice distribution is achieved. This ensures that the newly extruded high-temperature pipe first comes into contact with a small amount of dry ice for mild cooling before gradually entering the low-temperature region. This avoids the problem of the outer layer of the pipe hardening while the inner layer remains hot due to instantaneous cooling. Gradual cooling effectively reduces thermal stress, prevents pipe warping, deformation, or surface cracking, and improves the yield. The air bladder 242 in the expansion component 240 is connected to the air pump 241 and can expand intermittently to resist and clear any dry ice blockages in the cooling cylinder 231. This solves the problem of dry ice easily getting stuck due to its irregular shape, ensures uniform distribution of dry ice, maintains stable cooling efficiency, and reduces the need for manual intervention.

[0040] Example 2: In the above-described device, dry ice is stored inside the cooling cylinder 231 and is in contact with the outside of the heat-conducting cylinder 237. When the dry ice comes into contact with the high-temperature surface of the heat-conducting cylinder 237, it will rapidly sublimate and absorb a large amount of heat, adhering to the outside of the heat-conducting cylinder 237. The expansion of the second air bladder 242 only allows the dry ice to be pressed more firmly against the inner wall of the heat-conducting cylinder 237. This causes the dry ice adhering to the surface of the heat-conducting cylinder 237 to intercept other dry ice, resulting in uneven distribution of the dry ice. Therefore, the solution in Example 1 is improved, such as... Figures 7-10 As shown: The processing component 200 also includes a deformable component 250; Deformable component 250 includes a stretch membrane 251, an iron ball 252, a cover ring 253, a mounting groove 254, and an electromagnet 255; The tension membrane 251 is annular and is sleeved on the outside of the heat-conducting cylinder 237. Both ends of the tension membrane 251 are fixed to the outer ring of the heat-conducting cylinder 237. There are multiple iron balls 252, which are evenly spaced inside the tension membrane 251. The tensile membrane 251 is made of silicone rubber. The silicone rubber tensile membrane 251 can maintain good elasticity even under the influence of dry ice low temperature, ensuring the normal operation of the device.

[0041] The cover ring 253 is a frustum-shaped cylinder with its axis running through it. The axis of the cover ring 253 and the axis of the cooling cylinder 231 are on the same straight line. The end with the smallest outer diameter of the cover ring 253 is fixed inside the processing box 211. The cooling cylinder 231 is located inside the cover ring 253. The cover ring 253 has an installation groove 254, and the guide cylinder 234 is located inside the installation groove 254. There are multiple electromagnets 255, which are evenly spaced within the inner ring of the cover ring 253.

[0042] Specifically, when cooling the pipe through the cooling cylinder 231, the electromagnets 255 at different positions are activated intermittently to attract the iron balls 252 at different positions. By pulling the iron balls 252, the stretching membrane 251 is deformed, removing the dry ice adhering to the surface and preventing the adhering dry ice from affecting the conveying operation of the rest of the dry ice.

[0043] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages: By intermittently activating electromagnets 255 at different positions, iron balls 252 are attracted, causing the tensile membrane 251 to deform, thereby shaking off or peeling off the dry ice adhering to the outer surface of the heat-conducting cylinder 237. This prevents dry ice from clumping and blocking the cooling channels, ensuring that the dry ice flows freely within the cooling cylinder 231 and maintaining the stability and consistency of the cooling effect. It also avoids localized overcooling or undercooling caused by uneven distribution of dry ice.

[0044] Example 3: The newly formed pipe is cooled by dry ice stored in cooling cylinder 231. However, different pipes require different cooling temperatures after production; differences in pipe wall thickness and material properties lead to inconsistent cooling temperatures. If direct heat exchange through the same cooling cylinder 231 is used uniformly, it may cause thin-walled pipes to become overcooled and brittle, or thick-walled pipes to be insufficiently cooled. Therefore, the solution in Example 2 is improved, such as... Figures 11-13 As shown: The processing component 200 also includes a fastener 260, which includes a positioning film 261 and a pull rope 262; The expansion component 240 also includes an expansion membrane 243, an air pump 244, an air supply line 245, and an air supply line 246; The expansion film 243 is annular, and its two ends are fixed to the outer ring of the heat-conducting cylinder 237. The expansion film 243 is located inside the tension film 251. An expansion cavity is formed between the expansion membrane 243 and the heat-conducting cylinder 237; Air pump 3244 is fixed to one side of cooling cylinder 231; A gas supply line 245 is provided inside the heat-conducting cylinder 237, and a gas supply line 246 is provided inside the cooling cylinder 231. The gas supply line 245 and the gas supply line 246 are connected. The gas supply line 245 is connected to the expansion cavity formed by the expansion film 243 and the heat-conducting cylinder 237, and the gas supply line 246 is connected to the output end of the air pump 244. The positioning film 261 is annular and is located in the expansion cavity formed by the expansion film 243 and the heat-conducting cylinder 237. The positioning film 261 is sleeved on the outside of the heat-conducting cylinder 237 and its two ends are fixed to the outer ring of the heat-conducting cylinder 237. The positioning membrane 261 and the expansion membrane 243 form a storage cavity, and the electrorheological fluid is stored in the storage cavity formed by the positioning membrane 261 and the expansion membrane 243. Two electrode plates are disposed between the positioning membrane 261 and the expansion membrane 243. The electrode plates are in contact with the electrorheological fluid filling the space between the positioning membrane 261 and the expansion membrane 243. The electrode plates are connected to the power supply. Specifically, when cooling pipes with different wall thicknesses, the expansion membrane 243 expands to form a heat insulation cavity. The greater the expansion, the better the heat insulation effect. The adjustment is made according to the needs. After the adjustment is completed, the electrorheological fluid stored between the positioning membrane 261 and the expansion membrane 243 is energized and hardened, thereby fixing the position of the expansion membrane 243 and maintaining the gap.

[0045] There are multiple pull ropes 262. The pull ropes 262 are located in the storage cavity formed by the positioning film 261 and the expansion film 243. The two ends of the pull ropes 262 are fixed to the positioning film 261 and the expansion film 243 respectively. The axis of the expansion film 243 and the axis of the heat-conducting cylinder 237 are on the same straight line; Both the pull rope 262 and the expansion membrane 243 are made of silicone rubber.

[0046] The silicone rubber tension rope 262 and expansion membrane 243 can maintain good elasticity even under the influence of dry ice low temperature, ensuring the normal operation of the device.

[0047] Specifically, by pulling the expansion membrane 243 and the positioning membrane 261 with the pull rope 262, the gap between the storage cavity is fixed to prevent the electrorheological fluid from accumulating at the bottom due to gravity.

[0048] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages: The equipment can dynamically adjust the cooling intensity according to the pipe wall thickness and material properties. The degree of expansion of the expansion membrane 243 controls the size of the insulation cavity: the greater the expansion, the stronger the insulation effect and the slower the cooling rate; conversely, the smaller the expansion, the faster the cooling. This solves the problem of thin-walled pipes being prone to overcooling and cracking or thick-walled pipes being insufficiently cooled, achieving customized cooling. It allows the same equipment to process multiple pipe specifications, reducing the need to change molds or cooling devices and lowering production costs.

[0049] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A pipe processing equipment for recycling plastic waste, characterized in that, It includes an extruder body (100) and a processing assembly (200), the processing assembly (200) including a cooling component (230) and an expansion component (240); The cooling component (230) includes a cooling cylinder (231) and a heat-conducting cylinder (237); the expansion component (240) includes an air pump (241) and an airbag (242). The cooling cylinder (231) is a hollow frustum shape. The cooling cylinder (231) is used to store dry ice. The cooling cylinder (231) is located on one side of the extruder body (100). The heat conduction cylinder (237) is fixed inside the cooling cylinder (231). The end of the cooling cylinder (231) with the smallest outer diameter faces the extruder body (100). Air pump 2 (241) and air bag 2 (242) are fixed on the outer ring and inner ring of the cooling cylinder (231) respectively, and air pump 2 (241) and air bag 2 (242) are connected; The second airbag (242) expands, resisting and clearing the dry ice blockage inside the cooling cylinder (231).

2. The pipe processing equipment for recycling plastic waste according to claim 1, characterized in that, The axis of the cooling cylinder (231) is parallel to the ground; The heat-conducting cylinder (237) is a cylindrical shape that runs through its axis, and the axis of the heat-conducting cylinder (237) and the axis of the cooling cylinder (231) are on the same straight line. The cooling component (230) also includes mounting ports (232). Mounting ports (232) are opened at both ends of the cooling cylinder (231). The mounting ports (232) are cylindrical. The axis of the mounting ports (232) and the axis of the cooling cylinder (231) are on the same straight line. The heat conduction cylinder (237) is installed in the mounting ports (232) at both ends of the cooling cylinder (231). The heat-conducting cylinder (237) is connected to the output end of the extruder body (100).

3. The pipe processing equipment for recycling plastic waste according to claim 2, characterized in that, Airbag 2 (242) is annular, and the axis of airbag 2 (242) is on the same straight line as the axis of heat-conducting cylinder (237); Airbag 2 (242) is made of silicone rubber.

4. The pipe processing equipment for recycling plastic waste according to claim 1, characterized in that, The processing assembly (200) also includes a processing part (210); The processing component (210) includes a processing box (211), a drying fan (212), a discharge port one (213), a partition (214), a discharge port two (215), a ventilation net (216), a mounting plate (217), a support leg (218), and a positioning port (219). The processing box (211) is a hollow cuboid and is located on one side of the extruder body (100). A positioning port (219) is opened on one side of the processing box (211). The end of the cooling cylinder (231) with the smallest outer diameter is fixed to the positioning port (219). The processing box (211) has a fixed partition (214) inside, and two discharge ports (215) are opened on the side of the partition (214). A discharge port (213) is opened on the side of the processing box (211) away from the positioning port (219). A drying fan (212) and a ventilation net (216) are installed on the upper and lower sides of the processing box (211). The drying fan (212), the second discharge port (215) and the ventilation screen (216) are all located on the side of the partition (214) away from the cooling cylinder (231); The processing box (211) is fixed to the side away from the extruder body (100) with a mounting plate (217), and the processing box (211) and the mounting plate (217) are fixed with support legs (218).

5. The pipe processing equipment for recycling plastic waste according to claim 4, characterized in that, The processing assembly (200) also includes an export component (220), which includes a telescopic rod one (221), a telescopic rod two (222), a sleeve (223), an airbag one (224), and an air pump one (225). Telescopic rod one (221) is fixed on the mounting plate (217), and telescopic rod two (222) is fixed on the output end of telescopic rod one (221). The telescopic direction of telescopic rod one (221) is perpendicular to the ground, and the telescopic direction of telescopic rod two (222) is parallel to the ground. Telescopic pole one (221) and telescopic pole two (222) are electric telescopic poles; The sleeve (223) is a cylindrical shape that runs through its axis. The sleeve (223) is fixed at the output end of the telescopic rod (222). The axis of the sleeve (223) and the telescopic direction of the telescopic rod (222) are on the same straight line. Airbag 1 (224) is ring-shaped and fixed to the outer ring of sleeve (223). Air pump 1 (225) is fixed to the inner ring of sleeve (223). The output end of air pump 1 (225) is connected to airbag 1 (224). Airbag 1 (224) is made of silicone rubber; After the sleeve (223) is inserted into the formed pipe, the airbag (224) inflates and contacts the inner wall of the pipe, assisting in pulling the pipe out.

6. The pipe processing equipment for recycling plastic waste according to claim 5, characterized in that, The cooling component (230) also includes a discharge port (233), a guide tube (234), a storage tube (235), a cover plate (236), an extension tube (238), and an exhaust pipe (239); A discharge port (233) is opened on the cooling cylinder (231), and a guide cylinder (234) is installed on the cooling cylinder (231) and communicates with the discharge port (233). The upper end of the guide cylinder (234) extends through the processing box (211) to the outside. The storage cylinder (235) is fixed on the guide cylinder (234), and the storage cylinder (235) has a cover plate (236). The storage cylinder (235) is used to store dry ice, and the guide cylinder (234) is used to store and transport dry ice. The extension cylinder (238) is a cylindrical shape that runs through its axis. The axis of the extension cylinder (238) and the axis of the heat-conducting cylinder (237) are on the same straight line. One end of the extension cylinder (238) is fixed to the end of the heat-conducting cylinder (237) away from the extruder body (100), and the other end of the extension cylinder (238) away from the heat-conducting cylinder (237) is fixed inside the discharge port two (215). The exhaust pipe (239) is fixed on one side of the cooling cylinder (231) and communicates with the inside of the cooling cylinder (231). The lower end of the exhaust pipe (239) passes through the processing box (211) and is connected to the carbon dioxide collector.

7. The pipe processing equipment for recycling plastic waste according to claim 6, characterized in that, Both the cooling cylinder (231) and the extension cylinder (238) are made of heat-insulating material to prevent the dry ice energy inside the cooling cylinder (231) from leaking out.

8. The pipe processing equipment for recycling plastic waste according to claim 1, characterized in that, The processing assembly (200) also includes a deformable component (250); The deformable component (250) includes a stretch membrane (251), an iron ball (252), a cover ring (253), a mounting groove (254), and an electromagnet (255); The tension membrane (251) is annular and is sleeved on the outside of the heat-conducting cylinder (237). Both ends of the tension membrane (251) are fixed to the outer ring of the heat-conducting cylinder (237). There are multiple iron balls (252) and they are evenly spaced inside the tension membrane (251). The tensile membrane (251) is made of silicone rubber; The cover ring (253) is a frustum-shaped cylinder with its axis running through it. The axis of the cover ring (253) and the axis of the cooling cylinder (231) are on the same straight line. The end with the smallest diameter of the outer ring of the cover ring (253) is fixed inside the machining box (211). The cooling cylinder (231) is located inside the cover ring (253). The cover ring (253) has an installation groove (254) and the guide cylinder (234) is located inside the installation groove (254). There are multiple electromagnets (255), which are evenly spaced in the inner ring of the cover ring (253).

9. The pipe processing equipment for recycling plastic waste according to claim 8, characterized in that, The processing assembly (200) also includes a fastener (260), which includes a positioning film (261) and a pull cord (262). The expansion component (240) also includes an expansion membrane (243), an air pump three (244), an air supply line one (245), and an air supply line two (246). The expansion membrane (243) is annular, and its two ends are fixed to the outer ring of the heat-conducting cylinder (237). The expansion membrane (243) is located inside the tension membrane (251). An expansion cavity is formed between the expansion film (243) and the heat-conducting cylinder (237); Air pump three (244) is fixed to one side of cooling cylinder (231); A gas supply line 1 (245) is opened in the heat-conducting cylinder (237), and a gas supply line 2 (246) is opened in the cooling cylinder (231). The gas supply line 1 (245) and the gas supply line 2 (246) are connected. The gas supply line 1 (245) is connected to the expansion cavity formed by the expansion membrane (243) and the heat-conducting cylinder (237), and the gas supply line 2 (246) is connected to the output end of the air pump 3 (244). The positioning film (261) is annular and is located in the expansion cavity formed by the expansion film (243) and the heat-conducting cylinder (237). The positioning film (261) is sleeved on the outside of the heat-conducting cylinder (237), and the two ends of the positioning film (261) are fixed to the outer ring of the heat-conducting cylinder (237). The positioning membrane (261) and the expansion membrane (243) form a storage cavity, and the electrorheological fluid is stored in the storage cavity formed by the positioning membrane (261) and the expansion membrane (243). Two electrode plates are disposed between the positioning membrane (261) and the expansion membrane (243). The electrode plates are in contact with the electrorheological fluid filling the space between the positioning membrane (261) and the expansion membrane (243). The electrode plates are connected to the power supply. There are multiple pull ropes (262). The pull ropes (262) are located in the storage cavity formed by the positioning film (261) and the expansion film (243). The two ends of the pull ropes (262) are fixed on the positioning film (261) and the expansion film (243) respectively. The axis of the expansion film (243) and the axis of the heat-conducting cylinder (237) are on the same straight line; Both the pull rope (262) and the expansion membrane (243) are made of silicone rubber.

10. A processing technology for pipe processing equipment for recycling plastic waste, characterized in that, The equipment for processing pipes for recycling plastic waste, as described in any one of claims 1-9, includes the following steps: S1: Before pipe forming, dry ice is added to the storage cylinder (235). The dry ice enters the cooling cylinder (231) through the guide cylinder (234) and is evenly distributed in the cooling cylinder (231). S2: By intermittently controlling the expansion of the second airbag (242), the dry ice stuck in the cooling cylinder (231) is resisted, the blockage is cleared, and the dry ice can fill the cooling cylinder (231). S3: The pipe formed by the extruder body (100) enters the heat conduction cylinder (237), and the dry ice stored in the cooling cylinder (231) cools the pipe body. The carbon dioxide generated after the dry ice sublimates is discharged through the exhaust pipe (239). S4: When the pipe is first extruded and it is necessary to guide the pipe out of the processing box (211), telescopic rod one (221) and telescopic rod two (222) work to send the sleeve (223) into the heat-conducting cylinder (237) and into the pipe. Then, through the expansion of airbag one (224), it abuts against the inner wall of the pipe. Through the retraction of telescopic rod two (222), the pipe is guided out of the processing box (211). S5: During the pipeline transportation process, the start of the drying fan (212) blows air into the pipeline to dry the moisture attached to the outer wall of the pipeline. The air blown in by the drying fan (212) can be discharged through the ventilation net (216).

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