Extrusion molding device for recycling polyvinyl chloride (PVC) and regenerating PVC pipe

Abstract

The invention discloses a recycled polyvinyl chloride regenerated PVC pipe extrusion molding device, and belongs to the technical field of plastic pipelines, the PVC pipe extrusion molding device comprises a spiral push pipe, the position of a discharge port of the spiral push pipe is fixedly connected with a molding die through a flange plate, and the molding die is fixedly connected with a screw. A cooling pond used for water cooling is arranged on the side, away from the spiral pushing pipeline, of the forming mold, the top of the cooling pond is fixedly connected with a top heat exchange cover used for assisting heat dissipation, the top heat exchange cover comprises a flow guide heat exchange cover, and pipeline through holes are formed in the middles of the two sides of the flow guide heat exchange cover in a penetrating mode. By arranging the top heat exchange cover and the cooling pool, the pipeline can be linked with a pressure piston during extrusion cooling, so that cooling water is circularly sprayed and soaked, the PVC pipeline is fully cooled and shaped, and when the temperature in the top heat exchange cover rises, airflow flowing is realized, cold air is sucked into the flow guide heat exchange cover, and hot air is discharged, so that the cooling effect is improved, and the production efficiency is improved. And heat dissipation is assisted.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic pipes, and particularly relates to an extrusion molding device for recycled polyvinyl chloride (PVC) pipes for regenerated PVC pipes. Background Art

[0002] Polyvinyl chloride is a common plastic. Each year, a large amount of polyvinyl chloride waste is recycled. In order to effectively reuse these resources, it is necessary to process this polyvinyl chloride to form new PVC pipes. PVC pipes are a commonly used type of plastic pipe. PVC pipes have good corrosion resistance to chemicals such as acids, alkalis, and salts, and are suitable for various different chemical environments. When transporting corrosive liquids or gases, they can maintain stable performance, extend service life, and are widely used in the field of pipeline transportation due to their relatively light weight, convenient installation, and low manufacturing cost. In the prior art, the extrusion die used for PVC pipe extrusion is directly connected to the screw pusher. The molten PVC pushed by the screw pusher has a certain rotational force. Directly pushing it into the extrusion die for molding will cause excessive stress on the PVC pipe and affect the strength of the pipe.

[0003] In the prior art, the coolant of the PVC pipe extruder is directly cooled by circulating water. This cooling method results in a relatively long cooling pool and a large floor area. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a device with small extrusion stress and a small floor area for the cooling structure.

[0005] The technical solution adopted to solve the above technical problem is: an extrusion molding device for recycled polyvinyl chloride regenerated PVC pipes, including a screw pushing pipe, and a molding die is fixedly connected to the outlet of the screw pushing pipe through a flange.

[0006] Through the above technical solution, the screw pushing pipe can push and feed PVC particles and molten PVC, and extrude and shape them through the molding die connected by the flange to form a pipe.

[0007] A cooling pool for water cooling is arranged on the side of the molding die away from the screw pushing pipe.

[0008] Through the above technical solution, the extruded and formed PVC pipe is immersed in the cooling water of the cooling pool for cooling, so as to fully cool and shape the PVC pipe.

[0009] A top heat exchange cover for assisting heat dissipation is fixedly connected to the top of the cooling pool.

[0010] Through the above technical solution, the top heat exchange cover can achieve air flow, take away the temperature in the cooling pool, and achieve auxiliary cooling.

[0011] Furthermore, the top heat exchange cover includes a diversion heat exchange cover. Through holes for pipes are formed through the middle positions on both sides of the diversion heat exchange cover, and a number of uniformly distributed air exchange holes are formed through the positions on both sides of the through holes for pipes on both sides of the diversion heat exchange cover.

[0012] Through the above technical solution, the inner side of the diversion heat exchange cover is arranged in an arc shape. When the temperature inside the diversion heat exchange cover is higher than the outside temperature, air flow is achieved to discharge heat energy, and the lower temperature is discharged into the diversion heat exchange cover to achieve heat exchange and cooling. The through holes for pipes can penetrate the diversion heat exchange cover with pipes, and the air exchange holes can draw cold air into the diversion heat exchange cover to achieve cooling.

[0013] Furthermore, two sieve plates arranged in a V shape are fixedly connected between the two parallel inner walls of the diversion heat exchange cover. A medium-pressure pipe is fixedly connected to the inner wall at any one side of the diversion heat exchange cover. Above the two sieve plates, a shower injector is arranged, and the shower injector is connected to a transfer pipe.

[0014] Through the above technical solution, the sieve plates arranged in a V shape can buffer the water sprayed by the shower injector and then let it fall, acting on the water tank of the cooling pool to replace the hot water in the water tank.

[0015] Furthermore, the cooling pool includes a cooling pool main body. Pipe placement grooves are formed through both ends of the cooling pool main body, and a disk-shaped condensation circulation pipe is fixedly connected in the pipe placement grooves through a fixing frame. A number of uniformly distributed pressing and guiding rollers are rotatably connected to the middle position of the inner wall of the water tank of the cooling pool main body.

[0016] Through the above technical solution, the water tank of the cooling pool main body can store cooling water. The extruded PVC pipes can be cooled by the cooling water. The disk-shaped condensation circulation pipe in the pipe placement groove is made of copper, which can effectively achieve heat exchange and dissipate the heat of the heated cooling water. The pressing and guiding rollers can fully press the PVC pipes in the cooling water for full cooling.

[0017] Furthermore, the water inlet of the condensation circulation pipe is fixedly connected through the bottom of the water tank of the cooling pool main body, and the water outlet of the condensation circulation pipe is connected to the bottom of the medium-pressure pipe.

[0018] Furthermore, a power roller is rotatably connected between the two parallel inner walls of the water tank of the cooling pool main body on the side away from the spiral pushing pipe. The water inlet of the condensation circulation pipe is located below the power roller. Semi-gears are fixedly connected through both ends of the outer wall of the power roller, and a pressure piston is slidably connected to the inner wall position of the water inlet of the condensation circulation pipe.

[0019] Through the above technical solution, when the PVC pipe is pulled outwards, the PVC pipe will drive the power roller to rotate, causing the half gear to rotate. The toothed part of the half gear will drive the power rack downwards, then the pressure piston will be pushed downwards, and the water in the cooling pool water tank will be pressed into the condensation circulation pipeline and sprayed out through the transfer pipeline and the shower injector.

[0020] Further, two symmetrically arranged power transmission rods are fixedly connected to the upper surface position of the pressure piston. The end of the power transmission rod far from the pressure piston is fixedly connected to a power rack. The power rack is meshed with the half gear through teeth. A support sieve plate is fixedly connected to the inner wall of the condensation circulation pipeline at a position below the pressure piston. A support return spring is fixedly connected between the upper surface of the support sieve plate and the lower surface of the pressure piston. A limit slide rod is fixedly connected to the center position of the lower surface of the pressure piston. The limit slide rod is slidably connected through the middle position of the surface of the support sieve plate.

[0021] Through the above technical solution, the power transmission rod can transmit the power of the power rack to the position of the pressure piston, realize the downward pressure of the pressure piston, and squeeze the water in the condensation circulation pipeline towards the shower injector. The limit slide rod that slides through the support sieve plate can limit the pressure piston, the power transmission rod and the power rack. And the support return spring supports the pressure piston. When the non-toothed part of the half gear cooperates with the power rack, the pressure piston rebounds upwards under the action of the support return spring, and the warm cooling water will flow into the condensation circulation pipeline.

[0022] Further, the forming die includes a die body. An isolation tightening plate is fixedly connected to the inner wall position of the die body. An inner diameter shaping column is threadedly connected to the middle of the isolation tightening plate close to the cooling pool. L-shaped through extrusion and diversion holes are penetrated and opened on both sides of the isolation tightening plate on the inner wall of the die body.

[0023] Through the above technical solution, the die body and the inner diameter shaping column cooperate with each other to form the PVC pipe. The isolation tightening plate can tighten and fix the inner diameter shaping column. At the same time, the isolation tightening plate can block the molten PVC material to prevent the molten PVC material with rotational force from being directly formed. The molten PVC material can be buffered and diverted to the position of the inner diameter shaping column through the extrusion and diversion holes for forming.

[0024] Further, the spiral pushing pipe includes a feeding pipe. A middle isolation net is fixedly connected to the inner wall of the feeding pipe. A spiral pusher is rotatably connected through the middle position of the middle isolation net. One end of the feeding pipe far from the forming die is fixedly connected to a main shaft box. One end of the spiral pusher far from the forming die is rotatably connected through the side wall of the feeding pipe and fixedly connected to the output end of the main shaft box.

[0025] Through the above technical solution, the middle isolation net arranged in the middle of the feeding pipeline intercepts the unmolten PVC particles for sufficient melting. The melted PVC fluid can pass through the middle isolation net. The spiral pusher rotates to push the PVC particles and the melted PVC fluid, and forms at the position of the forming die. The driving structure provided in the main spindle box can provide the power for the rotation of the spiral pusher.

[0026] Furthermore, a number of evenly distributed ceramic heaters are penetrated and arranged at the outer wall position of the feeding pipeline, and a PVC storage barrel is fixedly connected through penetration at one end of the outer wall of the feeding pipeline close to the main spindle box.

[0027] Through the above technical solution, the ceramic heater is sleeved on the outside of the feeding pipeline, which can heat the inside of the feeding pipeline, so that the PVC particles in the feeding pipeline are fully melted. The PVC storage barrel can store PVC particles and leak the PVC particles into the feeding pipeline.

[0028] The beneficial effects of the present invention are as follows: (1) By setting a condensation circulation pipeline in the present invention, when the PVC pipeline is pulled out, the power of the movement of the PVC pipeline drives the pressure piston to move up and down, and intermittent water spraying of the shower nozzle can be realized for spray cooling. At the same time, the inner part of the diversion heat exchange cover is arranged in an arc shape. When the temperature in the diversion heat exchange cover rises, the hot air in the diversion heat exchange cover will float up, and the pressure in the diversion heat exchange cover decreases, so the cold air enters the diversion heat exchange cover through the air exchange holes, realizing auxiliary cooling and improving the cooling efficiency of the PVC pipeline, which can reduce the floor area of the cooling equipment and make full use of the workshop area; (2) By setting a forming die in the present invention, through the rotation of the spiral pusher, the melted PVC particles are pushed. The PVC that is not fully melted is blocked by the middle isolation net, so that the PVC forming quality is high. And the melted PVC material is buffered by the isolation tightening plate and conducted to the inner diameter sizing column position through the extrusion diversion hole for forming, so that there is no torsional force when the PVC material is formed, and the formed PVC pipe has small torsional stress and high pipe strength. Description of the Drawings

[0029] Figure 1 is a three-dimensional structural schematic diagram of an extrusion forming device for recycled polyvinyl chloride regenerated PVC pipes of the present invention; Figure 2 is an assembly drawing of a spiral pushing pipe and a main spindle box of an extrusion forming device for recycled polyvinyl chloride regenerated PVC pipes of the present invention; Figure 3 is a cross-sectional view of a cooling pool main body of an extrusion forming device for recycled polyvinyl chloride regenerated PVC pipes of the present invention; Figure 4 is a cross-sectional view of a spiral pushing pipe of an extrusion forming device for recycled polyvinyl chloride regenerated PVC pipes of the present invention; Figure 5 is Figure 4 an enlarged view of part A in Figure 6 a sectional view of the piston liquid exchanger of the extrusion molding device for recycling polyvinyl chloride regenerated PVC pipes according to the present invention; Figure 7 a three - dimensional view of the condensation circulation pipeline of the extrusion molding device for recycling polyvinyl chloride regenerated PVC pipes according to the present invention.

[0030] Reference numerals: 1, main spindle box; 2, PVC storage barrel; 3, ceramic heater; 4, spiral pushing pipe; 40, feeding pipeline; 41, middle isolation net; 42, spiral pusher; 5, top heat exchange cover; 50, diversion heat exchange cover; 51, shower nozzle; 52, sieve plate; 53, transfer pipeline; 54, ventilation hole; 55, condensation circulation pipeline; 56, pressing diversion roller; 57, pressure piston; 58, power roller; 59, pipeline through - hole; 510, half gear; 511, power rack; 512, power transmission rod; 513, support return spring; 514, limit slide bar; 515, support sieve plate; 6, cooling pool; 60, cooling pool main body; 61, pipeline placement groove; 7, forming die; 70, die main body; 71, extrusion and diversion hole; 72, isolation tightening plate; 73, inner diameter sizing column. Detailed implementation manners

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] As Figure 1-7 shown, an extrusion molding device for recycling polyvinyl chloride regenerated PVC pipes in this embodiment includes a spiral pushing pipe 4. The outlet of the spiral pushing pipeline 4 is fixedly connected to a forming die 7 through a flange. The spiral pushing pipe 4 can push and feed PVC particles and molten PVC, and extrude and shape them through the forming die 7 connected by the flange to form pipes.

[0033] The spiral feeding pipe 4 includes a feeding pipeline 40. A middle isolation net 41 is fixedly connected to the inner wall of the feeding pipeline 40. A spiral pusher 42 is rotatably connected through the middle position of the middle isolation net 41. One end of the feeding pipeline 40 away from the forming die 7 is fixedly connected to a main shaft box 1. One end of the spiral pusher 42 away from the forming die 7 is rotatably connected through the side wall of the feeding pipeline 40 and is fixedly connected to the output end of the main shaft box 1. The middle isolation net 41 arranged in the middle of the feeding pipeline 40 intercepts the unmolten PVC particles for sufficient melting. The molten PVC fluid can pass through the middle isolation net 41. The rotation of the spiral pusher 42 can push the PVC particles and the molten PVC fluid, and form at the position of the forming die 7. The driving structure provided in the main shaft box 1 can provide the power for the rotation of the spiral pusher 42.

[0034] A number of evenly distributed ceramic heaters 3 are arranged through the outer wall position of the feeding pipeline 40. One end of the outer wall of the feeding pipeline 40 close to the main shaft box 1 is fixedly connected through with a PVC storage bucket 2. The ceramic heaters 3 are sleeved on the outside of the feeding pipeline 40 and can heat the inside of the feeding pipeline 40, so that the PVC particles in the feeding pipeline 40 are fully melted. The PVC storage bucket 2 can store the PVC particles and leak the PVC particles into the feeding pipeline 40.

[0035] The forming die 7 includes a die body 70. An isolation tightening plate 72 is fixedly connected to the inner wall position of the die body 70. An inner diameter sizing column 73 is threadedly connected to the middle of the isolation tightening plate 72 close to the cooling pool 6. L-shaped through extrusion and diversion holes 71 are arranged through the inner wall of the die body 70 on both sides of the isolation tightening plate 72. The cooperation between the die body 70 and the inner diameter sizing column 73 enables the formation of PVC pipes. The isolation tightening plate 72 can tighten and fix the inner diameter sizing column 73. At the same time, the isolation tightening plate 72 can block the molten PVC material to prevent the molten PVC material with rotational force from directly forming. The molten PVC material can be buffered and diverted to the position of the inner diameter sizing column 73 through the extrusion and diversion holes 71 for forming.

[0036] A cooling pool 6 for water cooling is arranged on one side of the forming die 7 away from the spiral pushing pipeline 4. The extruded and formed PVC pipe is immersed in the cooling water of the cooling pool 6 for cooling to realize full cooling and sizing of the PVC pipe.

[0037] A top heat exchange cover 5 for assisting heat dissipation is fixedly connected to the top position of the cooling pool 6. The top heat exchange cover 5 can realize air flow and take away the temperature in the cooling pool 6 to realize auxiliary cooling.

[0038] The top heat exchange cover 5 includes a diversion heat exchange cover 50. Through holes 59 for pipes are formed in the middle positions on both sides of the diversion heat exchange cover 50. A number of uniformly distributed air exchange holes 54 are formed through both sides of the diversion heat exchange cover 50 at positions on both sides of the through holes 59 for pipes. The inner side of the diversion heat exchange cover 50 is arranged in an arc shape. When the temperature inside the diversion heat exchange cover 50 is higher than the external temperature, air flow is realized to discharge heat energy, and the lower temperature is discharged into the diversion heat exchange cover 50 to realize heat exchange and cooling. The through holes 59 for pipes can penetrate the diversion heat exchange cover 50 with pipes, and the air exchange holes 54 can draw cold air into the diversion heat exchange cover 50 to realize cooling.

[0039] Two sieve plates 52 arranged in a V shape are fixedly connected between the two parallel inner walls of the diversion heat exchange cover 50. A transfer pipe 53 is fixedly connected to the inner wall of any one side of the diversion heat exchange cover 50. A shower injector 51 is arranged above the two sieve plates 52. The shower injector 51 is connected to the transfer pipe 53 through pipes. The sieve plates 52 arranged in a V shape can buffer the water sprayed by the shower injector 51 and then let it flow down, acting on the water tank of the cooling pool 6 to replace the hot water in the water tank.

[0040] The cooling pool 6 includes a cooling pool main body 60. Pipe placement grooves 61 are formed through both ends of the cooling pool main body 60. And a disk-shaped condensation circulation pipe 55 is fixedly connected in the pipe placement grooves 61 through a fixing frame. A number of uniformly distributed pressing and guiding rollers 56 are rotatably connected to the middle position of the inner wall of the water tank of the cooling pool main body 60. The water tank of the cooling pool main body 60 can store cooling water, and the extruded PVC pipes can be cooled by the cooling water. The disk-shaped condensation circulation pipe 55 in the pipe placement grooves 61 is made of copper, which can effectively realize heat exchange and dissipate the heat of the heated cooling water. The pressing and guiding rollers 56 can fully press the PVC pipes in the cooling water for full cooling.

[0041] The water inlet of the condensation circulation pipe 55 is fixedly connected through the bottom of the water tank of the cooling pool main body 60. The water outlet of the condensation circulation pipe 55 is connected to the bottom of the medium-pressure pipe 53 through pipes.

[0042] A power roller 58 is rotatably connected between the two parallel inner walls of the water tank of the cooling pool main body 60 on the side far from the spiral pushing pipe 4. And the water inlet of the condensation circulation pipe 55 is located below the power roller 58. Semi-gears 510 are fixedly connected through both ends of the outer wall of the power roller 58. A pressure piston 57 is slidably connected to the inner wall position of the water inlet of the condensation circulation pipe 55. When the PVC pipes are pulled outwards, the PVC pipes will drive the power roller 58 to rotate, causing the semi-gears 510 to rotate. The toothed part of the semi-gears 510 will drive the power rack 511 to press downwards, then the pressure piston 57 will press downwards, and the water in the water tank of the cooling pool 6 will be pressed into the condensation circulation pipe 55 and sprayed out through the transfer pipe 53 and the shower injector 51.

[0043] On the upper surface of the pressure piston 57, two symmetrically arranged power transmission rods 512 are fixedly connected. At one end of the power transmission rod 512 away from the pressure piston 57, a power rack 511 is fixedly connected. The power rack 511 is meshed with the half gear 510 through gear teeth. On the inner wall of the condensation circulation pipe 55, a support sieve plate 515 is fixedly connected at a position below the pressure piston 57. A support return spring 513 is fixedly connected between the upper surface of the support sieve plate 515 and the lower surface of the pressure piston 57. At the central position of the lower surface of the pressure piston 57, a limit slide rod 514 is fixedly connected. The limit slide rod 514 is slidably connected through the middle position of the surface of the support sieve plate 515. The power transmission rod 512 can transmit the power of the power rack 511 to the position of the pressure piston 57, realizing the downward pressure of the pressure piston 57, and squeezing the water in the condensation circulation pipe 55 towards the shower nozzle 51. The limit slide rod 514 that penetrates and slides at the position of the support sieve plate 515 can limit the pressure piston 57, the power transmission rod 512 and the power rack 511. And the support return spring 513 supports the pressure piston 57. When the non-gear part of the half gear 510 cooperates with the power rack 511, the pressure piston 57 rebounds upward under the action of the support return spring 513, and then the warm cooling water will flow into the condensation circulation pipe 55.

[0044] The working principle of this embodiment is as follows: The recycled polyvinyl chloride material is cleaned and dried, the cleaned and dried polyvinyl chloride is crushed and granulated, the PVC particles are poured into the PVC storage bucket 2, and the PVC particles are added to the spiral pushing pipe 4 through the PVC storage bucket 2, and the power source in the main spindle box 1 is started; The power output end in the main spindle box 1 drives the spiral pusher 42 to rotate. At the same time, the ceramic heater 3 is started, and the feeding pipe 40 is heated by the ceramic heater 3, so that the PVC material is melted. The melted PVC material passes through the middle isolation net 41 and is pushed by the spiral pusher 42 to the forming die 7 position; The molten PVC material is isolated and buffered by the isolation tightening plate 72. The molten PVC material flows to the inner diameter sizing column 73 through the extrusion diversion hole 71, and the torsional force of the flowing PVC material can be offset, so that the molten PVC material is formed and extruded under the action of the inner diameter sizing column 73 and the inner wall of the die body 70. Manually pull out the formed PVC pipe, insert it into the cooling pool main body 60 through the pipe through hole 59, and immerse the formed PVC pipe in the cooling water of the cooling pool main body 60. Under the action of pressing the guide roller 56, the pipe is fully pressed in the cooling water of the cooling pool main body 60. Pull the pipe out of the liquid surface, then place it on the surface of the power roller 58, pass it out from the pipe through hole 59 far from the forming die 7, and insert it into the traction machine; The tractor drives the pipeline to move, causing the cooled PVC pipe to drive the power roller 58 to rotate. The power roller 58 drives the half gear 510 to rotate. The toothed part of the half gear 510 meshes with the power rack 511, causing the power rack 511 to press downwards. Then, the power transmission rod 512 and the pressure piston 57 are pressed down under the action of the power rack 511, so that the condensed water in the cooling tank main body 60 is pressed into the condensation circulation pipeline 55 and cooled through the disc-shaped condensation circulation pipeline 55. The condensed water in the condensation circulation pipeline 55 is sprayed out from the position of the shower nozzle 51 and buffered and leaked through the sieve plate 52. The condensed water is further cooled during the falling process, so that the condensed water in the cooling tank main body 60 always remains at a low temperature, having a good heat dissipation effect; When the temperature rises in the diversion heat exchange cover 50, the hot air will rise, and the air pressure in the diversion heat exchange cover 50 will decrease. Then, cold air will be poured into the position of the ventilation hole 54 to cool the inside of the diversion heat exchange cover 50, so that the PVC pipeline has a good cooling effect; When the power roller 58 and the half gear 510 are rotating, when the non-gear part cooperates with the power rack 511, the power rack 511 has no downward pressure. Then, under the action of the support return spring 513, the pressure piston 57 springs upwards, so that the condensed water in the cooling tank main body 60 enters the condensation circulation pipeline 55 to realize the cooling cycle of the condensed water. And the pressure piston 57 can only move up and down under the action of the support sieve plate 515 and the limit slide rod 514 to ensure the full cooperation between the power rack 511 and the half gear 510; A number of cleaning material openings are arranged on the outer wall of the feeding pipeline 40. During use, the cleaning material openings are regularly opened to clean the inner wall of the feeding pipeline 40 and the middle isolation net 41, avoiding the blockage of the middle isolation net 41 by impurities in the PVC material.

[0045] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A recycling PVC pipe extrusion molding device for recycled polyvinyl chloride, including a spiral pushing pipe (4), characterized in that: The outlet position of the spiral pushing pipe (4) is fixedly connected with a forming die (7) through a flange plate; A cooling pool (6) for water cooling is arranged on one side of the forming die (7) away from the spiral pushing pipe (4); A top heat exchange cover (5) for assisting heat dissipation is fixedly connected to the top position of the cooling pool (6).

2. The extrusion molding device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 1, characterized in that, The top heat exchange cover (5) includes a diversion heat exchange cover (50). Through holes (59) are formed in the middle positions on both sides of the diversion heat exchange cover (50), and a number of uniformly distributed air exchange holes (54) are formed in the positions on both sides of the diversion heat exchange cover (50) on both sides of the through holes (59).

3. The extrusion forming device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 2, characterized in that, Two sieve plates (52) arranged in a V-shape are fixedly connected between the two parallel inner walls of the diversion heat exchange cover (50). A medium-pressure pipe (53) is fixedly connected to the inner wall of any one side of the diversion heat exchange cover (50). A shower sprayer (51) is arranged above the two sieve plates (52), and the shower sprayer (51) is connected to the transfer pipe (53) through a pipeline.

4. The extrusion forming device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 3, characterized in that, The cooling pool (6) includes a cooling pool main body (60). Pipe placement grooves (61) are formed through both ends of the cooling pool main body (60), and a disk-shaped condensation circulation pipe (55) is fixedly connected in the pipe placement grooves (61) through a fixing frame. A number of uniformly distributed pressing and guiding rollers (56) are rotatably connected to the middle position of the inner wall of the water tank of the cooling pool main body (60).

5. The extrusion molding device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 4, characterized in that, The water inlet of the condensation circulation pipe (55) is fixedly connected through the bottom of the water tank of the cooling pool main body (60), and the water outlet of the condensation circulation pipe (55) is connected to the bottom of the transfer pipe (53) through a pipeline.

6. The extrusion molding device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 5, characterized in that, A power roller (58) is rotatably connected between the two parallel inner walls of the water tank of the cooling pool main body (60) on the side away from the spiral pushing pipe (4), and the water inlet of the condensation circulation pipe (55) is located below the power roller (58). Half gears (510) are fixedly connected through both ends of the outer wall of the power roller (58). A pressure piston (57) is slidably connected to the inner wall position of the water inlet of the condensation circulation pipe (55).

7. An extrusion forming device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 6, characterized in that, Two symmetrically arranged power transmission rods (512) are fixedly connected to the upper surface of the pressure piston (57). A power rack (511) is fixedly connected to one end of the power transmission rod (512) away from the pressure piston (57). The power rack (511) is meshed with the half gear (510) through teeth. A support sieve plate (515) is fixedly connected to the inner wall position of the condensation circulation pipe (55) below the pressure piston (57). A support return spring (513) is fixedly connected between the upper surface of the support sieve plate (515) and the lower surface of the pressure piston (57). A limit slide rod (514) is fixedly connected to the center position of the lower surface of the pressure piston (57), and the limit slide rod (514) is slidably connected through the middle position of the surface of the support sieve plate (515).

8. The extrusion molding device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 1, wherein: The forming die (7) includes a die body (70), and an isolation tightening plate (72) is fixedly connected to the inner wall of the die body (70). A diameter sizing column (73) is threadedly connected to the middle of the side of the isolation tightening plate (72) close to the cooling pool (6). Through extrusion and delivery diversion holes (71) in an L shape are formed through the inner wall of the die body (70) on both sides of the isolation tightening plate (72).

9. The extrusion molding device for recycling polyvinyl chloride to regenerate PVC pipes according to claim 1, characterized in that, The spiral delivery pipe (4) includes a feeding pipe (40), and a middle isolation net (41) is fixedly connected to the inner wall of the feeding pipe (40). A spiral pusher (42) is rotatably connected through the middle of the middle isolation net (41). One end of the feeding pipe (40) away from the forming die (7) is fixedly connected to a main shaft box (1). One end of the spiral pusher (42) away from the forming die (7) is rotatably connected through the side wall of the feeding pipe (40) and is fixedly connected to the output end of the main shaft box (1).

10. A PVC pipe extrusion forming device for recycling polyvinyl chloride regenerated PVC according to claim 9, characterized in that, A number of evenly distributed ceramic heaters (3) are arranged through the outer wall of the feeding pipe (40). A PVC storage barrel (2) is fixedly connected through the outer wall of the feeding pipe (40) close to one end of the main shaft box (1).

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