A pipe forming cooling device for polyethylene pipe extrusion equipment

Abstract

The present application relates to polyethylene pipe extrusion equipment forming pipe cooling technical field, and disclose a kind of polyethylene pipe extrusion equipment forming pipe cooling device, including electric telescopic link, the output end of electric telescopic link is fixedly connected with sliding ring, the inner wall of sliding ring is fixedly connected with extruding rod, the inside of cooling cover is fixedly connected with extension elastic rod.The present application is straightened by being provided with straightening mechanism, when contact wheel moves to position, it will be contacted with the surface of the pipe after forming, to straighten the pipe, prevent the phenomenon that pipe appears bending, when support cover moves, the end of extension elastic rod will be pulled to extend towards each other, effectively through the cooperation between extruding rod, support cover, contact wheel and force block, to adjust three groups of support cover and contact wheel according to the diameter of pipe, when support cover and contact wheel are adjusted to position, can straighten the observation after forming, prevent the phenomenon that pipe appears bending in the process of cooling.

Description

Technical Field

[0001] This invention relates to the field of cooling technology for molded pipes used in polyethylene pipe extrusion equipment, specifically to a cooling device for molded pipes used in polyethylene pipe extrusion equipment. Background Technology

[0002] Polyethylene pipes (PE pipes) are thermoplastic pipes extruded from polyethylene resin (mainly high-density polyethylene HDPE). They are widely used for water supply, gas transmission, irrigation, and industrial fluid transmission. They are characterized by corrosion resistance, non-toxicity, flexibility, impact resistance, long service life (designed for more than 50 years), and the ability to be heat-fused / electrofused.

[0003] Existing polyethylene pipes require timely cooling and shaping after extrusion molding. Traditional cooling devices can only cool a single area of ​​the pipe, resulting in uneven spray distribution and low heat exchange efficiency. They cannot achieve rapid, uniform cooling and sufficient shaping of freshly extruded polyethylene pipes, which easily leads to inadequate cooling and poor shaping. This not only affects the pipe molding quality and dimensional stability but also reduces the overall production efficiency of the entire extrusion production line. Summary of the Invention

[0004] The purpose of this invention is to provide a cooling device for molded pipes used in polyethylene pipe extrusion equipment, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a cooling device for formed pipes in polyethylene pipe extrusion equipment, comprising a pipe forming machine, a feed pipe fixedly connected to the surface of the pipe forming machine, a cooling cover fixedly connected to the end of the pipe forming machine, and a water pump disposed below the cooling cover; characterized in that it further comprises; A straightening mechanism, comprising a support cover, wherein a contact wheel is rotatably connected to the inner wall of the support cover, and a force-bearing block is fixedly connected to the surface of the support cover; A guiding mechanism, comprising a U-shaped plate, a guide wheel rotatably connected to the inner wall of the U-shaped plate, and right-angle plates fixedly connected to both ends of the U-shaped plate; A cooling mechanism, comprising an annular tube, wherein a spray pipe is fixedly connected to the surface of the annular tube, and a spray nozzle is fixedly connected to the surface of the spray pipe.

[0006] Furthermore, the cooling cover has inlet and outlet holes at both ends, a return hole at the bottom, a sliding groove at the end of the pipe forming machine, and moving grooves on both sides of the inner wall of the cooling cover.

[0007] Furthermore, the straightening mechanism includes an electric telescopic rod, the output end of which is fixedly connected to a slip ring. An extrusion rod is fixedly connected to the inner wall of the slip ring, and an extension elastic rod is fixedly connected to the inside of the cooling cover. When the slip ring slides, it drives the extrusion rod to move towards the pipe forming machine. As the extrusion rod moves, it extrudes the force-bearing block. When the force-bearing block is extruded, it moves towards each other. As the force-bearing block moves, it pushes the support cover towards each other. As the support cover moves, it pushes the contact wheel towards each other. When the contact wheel is in position, it contacts the surface of the formed pipe, thereby straightening the pipe and preventing bending.

[0008] Furthermore, the surface of the electric telescopic rod is fixedly connected to the inner wall of the cooling cover, the outer wall of the slip ring is slidably connected to the inner wall of the moving groove, the surface of the support cover is fixedly connected to the end of the extension elastic rod, and the surface of the extrusion rod is in contact with the surface of the force-bearing block.

[0009] Furthermore, the guiding mechanism includes a sliding plate, a slider slidably connected to the inner wall of the sliding plate, a push plate hinged to the end of the slider, a long plate fixedly connected to the end of the slider away from the push plate, a push rod hinged to the end of the right-angle plate away from the U-shaped plate, and a sliding plate fixedly connected to the surface of the U-shaped plate. When the right-angle plate moves, it drives the end of the push rod to move closer to each other, while the other end of the push rod pushes the upper and lower sets of U-shaped plates to move closer to each other. When the U-shaped plates move, they drive the guide wheels to move closer to each other. When the four sets of U-shaped plates and guide wheels move into position, they will contact the processed pipe. Effectively, after the four sets of U-shaped plates and guide wheels move into position, they will contact the pipe, thereby guiding the pipe and supporting the newly processed pipe.

[0010] Furthermore, both ends of the chute plate are fixedly connected to the ends of the pipe forming machine and the cooling cover, the inner wall of the chute is slidably connected to the end of the slide plate, the end of the long plate away from the slider is fixedly connected to the end of the slip ring, the end of the push rod away from the right angle plate is hinged to the surface of the U-shaped plate, and four guide wheels are provided, which are symmetrically arranged with the inlet and outlet holes as the center.

[0011] Furthermore, the cooling mechanism includes a liquid storage tank, the surface of which is fixedly connected to a return pipe and a suction pipe. The output end of the water pump is fixedly connected to an inlet pipe, and a cooling fan is fixedly connected to the top of the inner wall of the cooling shroud. Since the surfaces of the three sets of spray pipes are each equipped with several spray nozzles, the spray nozzles can evenly spray coolant onto the surface of the pipe. Then, the cooling fan is activated to work with the sprayed coolant, thereby improving the cooling efficiency of the pipe. Since the bottom of the inner wall of the cooling shroud is provided with a return hole, the coolant sprayed from the spray nozzles will flow into the bottom of the inner wall of the cooling shroud and then flow uniformly to the return hole. The return hole then allows the coolant to flow into the interior of the return pipe, and finally, the coolant flows back to the interior of the liquid storage tank through the return pipe for further cooling. Because the coolant is continuously drawn from the interior of the liquid storage tank and continuously returned to the interior of the liquid storage tank through the return pipe, the coolant is recycled, reducing coolant consumption.

[0012] Furthermore, the top of the liquid storage tank is provided with a liquid filling hole, the end of the liquid extraction pipe away from the liquid storage tank is fixedly connected to the output end of the water pump, the outer wall of the annular pipe is fixedly connected to the inner wall of the cooling cover, the end of the return pipe away from the liquid storage tank is fixedly connected to the end of the return hole, and the output end of the water pump is fixedly connected to the surface of the liquid inlet pipe.

[0013] The present invention has the following beneficial effects: This invention uses an electric telescopic rod to drive a slip ring and an extrusion rod, which can automatically adjust the radial spacing and straightening pressure of the contact wheels according to the diameter of the pipe. It can perform circumferential constraint and straightening on the pipe when it is just extruded and before it is fully shaped, effectively preventing the pipe from bending, eccentricity, and elliptical deformation during the cooling process, significantly improving the straightness and roundness of the pipe, and ensuring the dimensional accuracy of the product.

[0014] This invention provides all-round support and centered guidance for the pipe through guide wheels, preventing the pipe from shifting, shaking, and scraping the inner wall of the cooling shroud, allowing the pipe to pass through the cooling zone smoothly and at a uniform speed. It is suitable for the extrusion production of polyethylene pipes of different diameters, and has high versatility and convenient adjustment.

[0015] This invention employs a cooling mechanism that combines a ring pipe, multiple spray pipes, and a dense spray pipe structure. After being distributed through the ring pipe, the coolant is evenly sprayed onto the outer wall of the pipe from multiple directions through the spray pipes. Combined with the forced convection heat exchange by the cooling fan, the cooling area is large, the heat exchange is uniform and fast, effectively shortening the cooling and shaping time of the pipe and improving the overall production efficiency of the extrusion production line.

[0016] This invention utilizes a return hole at the bottom of the cooling cover. The sprayed coolant automatically returns to the storage tank through the return hole and return pipe, achieving closed-loop recycling of the coolant. This eliminates waste, significantly reduces coolant consumption, lowers equipment operating costs, and prevents coolant leakage from polluting the production environment.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the anti-tilting mechanism of the present invention; Figure 4 This is a schematic diagram of the slip ring structure of the present invention; Figure 5 This is a schematic diagram of the overall structure of the guiding mechanism of the present invention; Figure 6 This is a schematic diagram of the right-angle plate structure of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of part A in the diagram; Figure 8 This is a schematic diagram of the overall structure of the cooling mechanism of the present invention; Figure 9 This is a schematic diagram of the nozzle structure of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Pipe forming machine; 2. Feed pipe; 3. Cooling cover; 4. Water pump; 10. Straightening mechanism; 11. Electric telescopic rod; 12. Slip ring; 13. Extrusion rod; 14. Extension elastic rod; 15. Support cover; 16. Contact wheel; 17. Force block; 30. Guide mechanism; 31. Slide plate; 32. Slider; 33. Push plate; 34. U-shaped plate; 35. Guide wheel; 37. Long plate; 38. Right angle plate; 39. Push rod; 40. Slide plate; 50. Cooling mechanism; 51. Liquid storage tank; 52. Return pipe; 53. Liquid extraction pipe; 54. Liquid inlet pipe; 55. Annular pipe; 56. Spray pipe; 57. Spray nozzle; 58. Cooling fan. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-9 As shown, the present invention is a cooling device for formed pipes in polyethylene pipe extrusion equipment, including a pipe forming machine 1, a feed pipe 2 fixedly connected to the surface of the pipe forming machine 1, a cooling cover 3 fixedly connected to the end of the pipe forming machine 1, and a water pump 4 arranged below the cooling cover 3. The invention is characterized by further comprising: The straightening mechanism 10 includes a support cover 15, a contact wheel 16 rotatably connected to the inner wall of the support cover 15, and a force-bearing block 17 fixedly connected to the surface of the support cover 15. The guide mechanism 30 includes a U-shaped plate 34, a guide wheel 35 is rotatably connected to the inner wall of the U-shaped plate 34, and right-angle plates 38 are fixedly connected to both ends of the U-shaped plate 34. The cooling mechanism 50 includes an annular pipe 55, a spray pipe 56 fixedly connected to the surface of the annular pipe 55, and a spray pipe 57 fixedly connected to the surface of the spray pipe 56.

[0023] The cooling cover 3 has inlet and outlet holes at both ends, a return hole at the bottom, a sliding groove at the end of the pipe forming machine 1, and moving grooves on both sides of the inner wall of the cooling cover 3.

[0024] The straightening mechanism 10 includes an electric telescopic rod 11. A slip ring 12 is fixedly connected to the output end of the electric telescopic rod 11. An extrusion rod 13 is fixedly connected to the inner wall of the slip ring 12. First, the pipe forming machine 1 is started, and then polyethylene material is introduced into the feed pipe 2. The polyethylene material then enters the pipe forming machine 1 through the feed pipe 2, where it is processed into a pipe. The formed pipe then enters the cooling shroud 3. Before the pipe enters the cooling shroud 3, the electric telescopic rod 11 is started, pushing the slip ring 12 to slide along the inner wall of the slide groove towards the pipe forming machine 1. As the slip ring 12 slides, it drives the extrusion rod 13 to move towards the pipe forming machine 1. An extension elastic rod 14 is fixedly connected inside the cooling shroud 3.

[0025] The surface of the electric telescopic rod 11 is fixedly connected to the inner wall of the cooling cover 3, the outer wall of the slip ring 12 is slidably connected to the inner wall of the moving groove, the surface of the support cover 15 is fixedly connected to the end of the extension elastic rod 14, the surface of the pressing rod 13 contacts the surface of the force-bearing block 17, and when the pressing rod 13 moves, it will press the force-bearing block 17. When the force-bearing block 17 is pressed, it will move towards each other. When the force-bearing block 17 moves, it will push the support cover 15 towards each other. When the support cover 15 moves, it will push the contact wheel 16 towards each other. After the support cover 15 moves into position, it will contact the surface of the formed pipe, thereby straightening the pipe and preventing bending. When the support cover 15 moves, it will pull the end of the extension elastic rod 14 to extend towards each other. Through the cooperation between the extrusion rod 13, support cover 15, contact wheel 16 and force block 17, the three sets of support covers 15 and contact wheel 16 can be adjusted according to the diameter of the pipe. When the support cover 15 and contact wheel 16 are adjusted into position, the formed pipe can be straightened to prevent bending during the cooling process.

[0026] The guide mechanism 30 includes a slide plate 31, a slider 32 slidably connected to the inner wall of the slide plate 31, a push plate 33 hinged to the end of the slider 32, a long plate 37 fixedly connected to the end of the slider 32 away from the push plate 33, a push rod 39 hinged to the end of the right-angle plate 38 away from the U-shaped plate 34, and a slide plate 40 fixedly connected to the surface of the U-shaped plate 34. When the slip ring 12 moves, it pushes the long plate 37 to move towards the pipe forming machine 1. When the long plate 37 moves, it pushes the slider 32 to slide on the inner wall of the slide plate 31 towards the pipe forming machine 1. When the slider 32 slides, it pushes the end of the push plate 33 to move towards the pipe forming machine 1, while the other end of the push plate 33 pushes the U-shaped plates 34 on the left and right sides to move towards each other.

[0027] Both ends of the chute plate 31 are fixedly connected to the ends of the pipe forming machine 1 and the cooling cover 3. The inner wall of the chute is slidably connected to the end of the slide plate 40. The end of the long plate 37 away from the slider 32 is fixedly connected to the end of the slip ring 12. The end of the push rod 39 away from the right-angle plate 38 is hinged to the surface of the U-shaped plate 34. Four guide wheels 35 are provided, and the four guide wheels 35 are symmetrically arranged around the inlet and outlet holes. When the U-shaped plate 34 moves, it will drive the guide wheels 35 to move towards each other. At the same time as the U-shaped plate 34 moves, it will drive the two sets of right-angle plates 38 to move towards each other. When plate 38 moves, it drives the end of push rod 39 to move closer to each other. The other end of push rod 39 pushes the upper and lower sets of U-shaped plates 34 to move closer to each other. When U-shaped plates 34 move, they drive guide wheels 35 to move closer to each other. When the four sets of U-shaped plates 34 and guide wheels 35 move into position, they will contact the processed pipe. Effectively, after the four sets of U-shaped plates 34 and guide wheels 35 move into position, they will contact the pipe, thereby guiding the pipe and supporting the newly processed pipe.

[0028] The cooling mechanism 50 includes a liquid storage tank 51. When the pipe enters the interior of the cooling shroud 3 and contacts the three sets of contact wheels 16, the water pump 4 is activated to extract the coolant from the interior of the liquid storage tank 51 through the extraction pipe 53. The surface of the liquid storage tank 51 is fixedly connected to a return pipe 52 and an extraction pipe 53. The output end of the water pump 4 is fixedly connected to an inlet pipe 54. A cooling fan 58 is fixedly connected to the top of the inner wall of the cooling shroud 3. The cooling fan 58 is then activated, working in conjunction with the sprayed coolant to improve the cooling efficiency of the pipe. The bottom of the wall is provided with a return hole. The coolant sprayed from the nozzle 57 will flow into the bottom of the inner wall of the cooling cover 3, and then flow to the return hole. The coolant will then flow into the return pipe 52 through the return pipe 52, and finally return to the inside of the storage tank 51 for further cooling through the return pipe 52. Because the coolant is continuously drawn from the inside of the storage tank 51 and continuously returned to the inside of the storage tank 51 through the return pipe 52, the coolant is recycled, reducing coolant consumption.

[0029] The top of the storage tank 51 is provided with a liquid filling hole. The end of the liquid extraction pipe 53 away from the storage tank 51 is fixedly connected to the output end of the water pump 4. The outer wall of the annular pipe 55 is fixedly connected to the inner wall of the cooling cover 3. The extracted coolant will enter the interior of the inlet pipe 54, and then the coolant will be evenly transported to the interior of the two sets of annular pipes 55 through the inlet pipe 54. Then the coolant inside the annular pipe 55 will be transported to the interior of the three sets of spray pipes 56. Finally, the coolant will be sprayed onto the surface of the pipe through the spray pipes 57 for cooling. Since the surface of the three sets of spray pipes 56 is provided with several spray pipes 57, the spray pipes 57 can evenly spray the coolant onto the surface of the pipe. The end of the return pipe 52 away from the storage tank 51 is fixedly connected to the end of the return hole. The output end of the water pump 4 is fixedly connected to the surface of the inlet pipe 54.

[0030] In operation, first start the pipe forming machine 1, then introduce polyethylene material into the feed pipe 2. The polyethylene material then enters the pipe forming machine 1 through the feed pipe 2, processing the polyethylene into a pipe. The formed pipe then enters the cooling shroud 3. Before the pipe enters the cooling shroud 3, first start the electric telescopic rod 11 to push the slip ring 12 to slide along the inner wall of the slide groove towards the pipe forming machine 1. When the slip ring 12 slides, it drives the extrusion rod 13 to move towards the pipe forming machine 1. As the extrusion rod 13 moves, it compresses the force block 17. When the force block 17 is compressed, it moves towards each other. This movement of the force block 17 pushes the support cover 15 towards each other, which in turn pushes the contact wheel 16 towards each other. When the contact wheel 16 reaches its position, it contacts the surface of the formed pipe, thus straightening the pipe and preventing bending. Simultaneously, as the support cover 15 moves... The extension elastic rod 14 is pulled to extend towards each other, effectively adjusting the three sets of support covers 15 and contact wheels 16 according to the diameter of the tube by cooperating with the extrusion rod 13, support cover 15, contact wheel 16 and force block 17. When the support cover 15 and contact wheel 16 are adjusted to the correct position, the tube can be straightened after forming to prevent bending during cooling. As the slip ring 12 moves, it pushes the long plate 37 towards the tube forming machine 1. When the long plate 37 moves, it pushes the slider 32 to slide along the inner wall of the slide plate 31 towards the tube forming machine 1. When the slider 32 slides, it pushes the push plate 33. The end of the push plate 33 moves towards the pipe forming machine 1, while the other end of the push plate 33 pushes the U-shaped plates 34 on the left and right sides to move closer to each other. When the U-shaped plates 34 move, they drive the guide wheels 35 to move closer to each other. At the same time as the U-shaped plates 34 move, they drive the two sets of right-angle plates 38 to move closer to each other. When the right-angle plates 38 move, they drive the end of the push rod 39 to move closer to each other. The other end of the push rod 39 pushes the upper and lower sets of U-shaped plates 34 to move closer to each other. When the U-shaped plates 34 move, they drive the guide wheels 35 to move closer to each other. When the four sets of U-shaped plates 34 and guide wheels 35 have moved into position... The system will come into contact with the processed pipe. After moving into position via four sets of U-shaped plates 34 and guide wheels 35, it will contact the pipe, thus guiding it and providing support. When the pipe enters the cooling shroud 3 and contacts the three sets of contact wheels 16, the water pump 4 is activated to extract the coolant from the storage tank 51 through the extraction pipe 53. The extracted coolant will enter the inlet pipe 54 and then be evenly delivered to the two sets of annular pipes 55. Finally, the annular pipes 55 will deliver the coolant to the three sets of spray pipes 56.Finally, the coolant is sprayed onto the surface of the pipe through nozzles 57 for further cooling. Since each of the three sets of spray pipes 56 has several nozzles 57, the nozzles 57 can evenly spray the coolant onto the pipe surface. Then, the cooling fan 58 is activated to work with the sprayed coolant, thereby improving the cooling efficiency of the pipe. Because the bottom of the inner wall of the cooling shroud 3 has a return hole, the coolant sprayed from the nozzles 57 flows into the bottom of the inner wall of the cooling shroud 3, then flows uniformly to the return hole, and then from the return hole to the return pipe 52. Finally, the coolant flows back to the storage tank 51 through the return pipe 52 for further cooling. Because coolant is continuously drawn from the storage tank 51 and continuously returned to the storage tank 51 through the return pipe 52, the coolant is recycled, reducing coolant consumption.

[0031] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cooling device for formed pipes in a polyethylene pipe extrusion equipment, comprising a pipe forming machine (1), wherein a feed pipe (2) is fixedly connected to the surface of the pipe forming machine (1), a cooling shroud (3) is fixedly connected to the end of the pipe forming machine (1), and a water pump (4) is disposed below the cooling shroud (3), characterized in that, Also includes; The straightening mechanism (10) includes a support cover (15), the inner wall of the support cover (15) is rotatably connected to a contact wheel (16), and the surface of the support cover (15) is fixedly connected to a force-bearing block (17). The guide mechanism (30) includes a U-shaped plate (34), a guide wheel (35) is rotatably connected to the inner wall of the U-shaped plate (34), and right-angle plates (38) are fixedly connected to both ends of the U-shaped plate (34). Cooling mechanism (50) includes an annular tube (55), a spray pipe (56) is fixedly connected to the surface of the annular tube (55), and a spray pipe (57) is fixedly connected to the surface of the spray pipe (56).

2. The cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 1, characterized in that: The cooling cover (3) has inlet and outlet holes at both ends, a return hole at the bottom, a sliding groove at the end of the pipe forming machine (1), and moving grooves on both sides of the inner wall of the cooling cover (3).

3. The cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 2, characterized in that: The straightening mechanism (10) includes an electric telescopic rod (11), the output end of which is fixedly connected to a slip ring (12), the inner wall of which is fixedly connected to a pressing rod (13), and the interior of the cooling cover (3) is fixedly connected to an extension elastic rod (14).

4. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 3, characterized in that: The surface of the electric telescopic rod (11) is fixedly connected to the inner wall of the cooling cover (3), the outer wall of the slip ring (12) is slidably connected to the inner wall of the moving groove, the surface of the support cover (15) is fixedly connected to the end of the extension elastic rod (14), and the surface of the extrusion rod (13) is in contact with the surface of the force block (17).

5. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 4, characterized in that: The guiding mechanism (30) includes a slide plate (31), a slider (32) is slidably connected to the inner wall of the slide plate (31), a push plate (33) is hinged to the end of the slider (32), a long plate (37) is fixedly connected to the end of the slider (32) away from the push plate (33), a push rod (39) is hinged to the end of the right angle plate (38) away from the U-shaped plate (34), and a sliding plate (40) is fixedly connected to the surface of the U-shaped plate (34).

6. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 5, characterized in that: Both ends of the chute plate (31) are fixedly connected to the ends of the pipe forming machine (1) and the cooling cover (3). The inner wall of the chute is slidably connected to the end of the slide plate (40). The end of the long plate (37) away from the slider (32) is fixedly connected to the end of the slip ring (12). The end of the push rod (39) away from the right angle plate (38) is hinged to the surface of the U-shaped plate (34). The number of guide wheels (35) is four, and the four guide wheels (35) are symmetrically arranged with the inlet and outlet holes as the center.

7. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 6, characterized in that: The cooling mechanism (50) includes a liquid storage tank (51), and a return pipe (52) and a liquid extraction pipe (53) are fixedly connected to the surface of the liquid storage tank (51). The output end of the water pump (4) is fixedly connected to an inlet pipe (54), and a cooling fan (58) is fixedly connected to the top of the inner wall of the cooling cover (3).

8. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 7, characterized in that: The top of the storage tank (51) is provided with a liquid filling hole. The end of the liquid extraction pipe (53) away from the storage tank (51) is fixedly connected to the output end of the water pump (4). The outer wall of the annular pipe (55) is fixedly connected to the inner wall of the cooling cover (3). The end of the return pipe (52) away from the storage tank (51) is fixedly connected to the end of the return hole. The output end of the water pump (4) is fixedly connected to the surface of the liquid inlet pipe (54).

Images