MPP cable protection pipe extrusion processing device

Abstract

The invention relates to the technical field of MPP cable protection pipe processing, in particular to an MPP cable protection pipe extrusion processing device which comprises an extruder main body, a spiral auger is rotationally connected to the interior of the extruder main body, an extrusion die is bolted to the front side of the interior of the extruder main body, a cooling structure is bolted to the front side of the extruder main body, and the cooling structure is connected to the front side of the extruder main body. A shaping structure is bolted to the front side of the cooling structure, and the rear side of the shaping structure penetrates through the cooling structure and is bolted to the extrusion mold; the cooling structure comprises a fixing shell, a pre-cooling assembly is connected to the rear side of the fixing shell in a bolting mode, a sealing shell is connected to the interior of the fixing shell in a bolting mode, sealing rubber strips are arranged on the front side and the rear side of the sealing shell, and the rear side of the pre-cooling assembly is connected with the extruder body in a bolting mode. The MPP cable protection pipe extrusion processing device provided by the invention has the advantages that the cable protection pipe is effectively cooled in the initial extrusion stage of the MPP cable protection pipe, the size is accurately fixed, and the production quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of MPP cable protection tube processing, in particular to an MPP cable protection tube extrusion processing device. Background Art

[0002] As we all know, MPP pipe, also known as MPP power cable protection pipe, is divided into trench type and trenchless type. MPP trenchless pipe is also called MPP jacking pipe or dragging pipe. MPP pipe uses modified polypropylene as the main raw material. It has the characteristics of high temperature resistance and external pressure resistance. It is suitable for medium and low voltage transmission line cable drainage pipes below 10KV.

[0003] After searching, a Chinese patent disclosed a cable protection tube rapid extrusion device, and its application publication number is CN117124567B. This patent solves the problems of low extrusion efficiency, inability to change the size of the extruded cable tube as needed, and too fast cooling.

[0004] MPP cable protection tubes are usually processed using extruders during manufacturing. The problems with the prior art are: the cable protection tube needs to be cooled in water after extrusion, and there is usually a certain distance between the cooling equipment and the extrusion equipment. Therefore, in the initial stage of extrusion, the cable protection tube is in a high temperature, softened and dimensionally unstable state. Due to the lack of immediate cooling measures, the cable protection tube at this stage is prone to deformation, sagging and other problems. In addition, since the material is at a high temperature and has a certain fluidity, the cable protection tube is prone to dimensional deviation in the initial stage of extrusion. Even if there are some subsequent adjustment measures, they are often carried out after cooling. At this time, the cable protection tube has undergone a certain degree of deformation, and it is difficult to adjust the size, and it is difficult to ensure the accuracy of the adjusted size. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides an MPP cable protection tube extrusion processing device, which has the advantages of effectively cooling the cable protection tube and accurately fixing the size in the initial stage of extrusion of the MPP cable protection tube, thereby improving production quality.

[0006] (II) Technical solution The above technical objectives of the present invention are achieved through the following technical solutions: an MPP cable protection tube extrusion processing device, comprising an extruder body, a spiral auger is rotatably connected inside the extruder body, an extrusion die is bolted to the front side of the extruder body, a cooling structure is bolted to the front side of the extruder body, and a shaping structure is bolted to the front side of the cooling structure, and the rear side of the shaping structure penetrates the cooling structure and is bolted to the extrusion die; The cooling structure comprises a fixed shell, a precooling assembly is bolted to the rear side of the fixed shell, and a sealing shell is bolted to the interior of the fixed shell, a sealing strip is arranged on the front and rear sides of the sealing shell, the rear side of the precooling assembly is bolted to the extruder body, and the top and bottom of the sealing shell and the precooling assembly are respectively connected with an air inlet pipe and an air outlet pipe; The shaping structure includes a hollow cylinder, which is bolted to the front side of the extrusion die, and the front side of the hollow cylinder passes through the interior of the pre-cooling component and the fixed shell, the front side of the fixed shell is bolted with a mounting shell, and the front side of the hollow cylinder extends to the interior of the mounting shell, and the inner wall of the mounting shell and the surface of the hollow cylinder are both sleeved with two groups of rotating components, and rolling components are arranged on the opposite sides of the inner and outer rotating components, and the inner and outer rotating components are arranged oppositely.

[0007] By adopting the above technical scheme, by setting a cooling structure and a shaping structure, in the initial stage of extrusion of the cable protection tube, the cooling structure pre-cools the newly extruded cable protection tube, effectively reducing its residence time in a high temperature and softened state, and reducing the possibility of deformation, sagging and other problems due to lack of immediate cooling, which helps the subsequent shaping structure to maintain the dimensional stability of the cable protection tube in the initial stage, laying the foundation for subsequent precise forming. The shaping structure fixes the size and optimizes the shape of the cable protection tube during its cooling process. Through the synergistic effect of the rotating component and the rolling component, it can effectively correct the dimensional deviation caused by the fluidity of the high-temperature material, so that the dimensional parameters such as the outer diameter and wall thickness of the cable protection tube meet the standard requirements, while ensuring its circularity and straightness, thereby improving the forming accuracy and appearance quality of the product.

[0008] The present invention is further configured as follows: the pre-cooling component includes a connecting shell, and the connecting shell is bolted between the fixed shell and the opposite side of the extruder body, a heat-conducting ring is bolted to the front side of the inner wall of the connecting shell, and a cooling ring is sleeved on the front side of the surface of the connecting shell, a cooling cavity is opened inside the cooling ring, and the cooling cavity is respectively connected to the air inlet pipe and the air outlet pipe, a heat-conducting rod is arranged inside the heat-conducting ring, and the side of the heat-conducting rod away from the heat-conducting ring passes through the interior of the connecting shell and extends to the interior of the cooling cavity, and a heat dissipation fin is bolted to the side of the heat-conducting rod in the cooling cavity.

[0009] By adopting the above technical solution, a pre-cooling component is set up, part of the cooling gas is allowed to flow into the cooling chamber through the air inlet pipe, and the heat of the cable protection tube is guided to the heat dissipation fins through the heat conduction ring and the heat conduction rod, and the heat is dissipated in the cooling chamber through the heat dissipation fins, so that the cooling gas can exchange heat with the heat and take away the heat of the cable protection tube, thereby improving the pre-cooling efficiency, allowing the cable protection tube to cool down quickly, and reducing the adverse effects under high temperature conditions.

[0010] The present invention is further configured as follows: the number of the heat conducting rods and the heat dissipating fins are both set to be several, and are respectively evenly distributed in annular shapes inside the heat conducting ring and the cooling cavity, and the interior of the heat dissipating fins is configured to have a porous structure.

[0011] By adopting the above technical solution, by setting the number of heat-conducting rods and heat-dissipating fins to be multiple and distributed in a ring shape, uniform conduction and dissipation of heat in the circumferential direction of the cable protection tube is ensured, avoiding differences in physical properties or deformation of the cable protection tube due to uneven local cooling, and ensuring consistency of product quality. The porous structure of the heat-dissipating fins is conducive to the formation of turbulence of the cooling gas inside, thereby enhancing the heat exchange effect between the gas and the heat-dissipating fins, and also enables the heat to be more evenly distributed and transferred inside the heat-dissipating fins, thereby improving the heat dissipation uniformity and efficiency of the entire pre-cooling assembly.

[0012] The present invention is further configured as follows: the sealing strip is arranged in an arc shape, and the front and rear sealing strips are arranged symmetrically, and a plurality of elastic frames are arranged inside the side of the sealing strip away from the sealing shell.

[0013] By adopting the above technical solution, the arc-shaped sealing strip is designed to match the shape of the cable protection tube, ensuring a good sealing effect when the cable protection tube passes through, preventing leakage of cooling gas. At the same time, the internal elastic skeleton gives the sealing strip a certain elastic deformation ability, which can maintain sealing performance when the cable protection tube is slightly deformed or has a certain size fluctuation, thereby ensuring the stability of the cooling process.

[0014] The present invention is further configured as follows: the bottom of the inside of the sealing shell is rotatably connected to a shaft rod, and a turntable is bolted to the left side of the shaft rod, a connecting column is bolted to the bottom of the left side of the turntable, and a connecting plate is rotatably sleeved on the surface of the connecting column, a blocking piece is rotatably connected to the bottom of the connecting plate, and the surface of the blocking piece contacts the inner wall of the air outlet pipe, a fixing ring is sleeved on the surface of the turntable, and the surface of the fixing ring is provided with ring-shaped patterns.

[0015] By adopting the above-mentioned technical solution and the above-mentioned arrangement, during the movement of the cable protection tube, the friction force between the surface texture of the fixing ring and the fixing ring is utilized to drive the fixing ring and the turntable to rotate, thereby causing the turntable to drive the connecting column to rotate, and the connecting column drives the blocking piece to move up and down in the air outlet pipe through the connecting plate, so that the blocking piece can periodically realize or release the closure of the air outlet pipe, thereby reducing the residence time of the cooling gas in the sealing shell and improving the cooling effect of the cable protection tube.

[0016] The present invention is further configured as follows: the rotating assembly includes a hollow collar, and the side of the hollow collar close to the inner wall of the hollow cylinder and the mounting shell is respectively connected to the two, the interior of the hollow collar is rotatably connected to an inner rotating plate, and one side of the inner rotating plate is bolted to a connecting ring, one side of the connecting ring extends to the outside of the hollow collar and is bolted to an outer rotating plate, the inner rotating plate and the outer rotating plate are in rotational contact with the hollow collar on one side thereof, the inner wall of the inner rotating plate is bolted to a plurality of inclined push plates in a ring shape, and the outer rotating plate is bolted to the rolling assembly on one side thereof.

[0017] By adopting the above technical solution, a rotating component is set up, and when the cooling gas enters the inner and outer hollow rings through the hollow cylinder and the pipeline, a rotating airflow will be generated, which can push the push plate, so that the push plate synchronously drives the inner rotating plate to rotate in the hollow ring, and synchronously drives the outer rotating plate and the rolling component to rotate through the connecting ring. Therefore, the internal rolling component and the external rolling component can rotate around the inner and outer walls of the cable protection tube at the same time, so that the rolling component can roll the cable protection tube, correct dimensional deviations and improve surface quality.

[0018] The present invention is further configured as follows: the rolling assembly includes a pressure roller, and a telescopic rod is bolted to the side of the pressure roller close to the outer rotating plate, the telescopic rod is bolted to the side of the outer rotating plate close to it, a pressure spring is sleeved on the surface of the telescopic rod, and the pressure spring is connected to the pressure roller and the outer rotating plate at one side respectively.

[0019] By adopting the above technical solution, a rolling assembly is set up. When the cable protection tube passes through the rolling assembly, the pressing roller contacts the surface of the cable protection tube. If the size of the cable protection tube changes, the telescopic rod extends and retracts under the action of the pressing spring, driving the pressing roller to adjust its position so that the pressing roller always applies appropriate pressure to the cable protection tube. In this process, the pressing roller rolls the cable protection tube through rolling friction, corrects dimensional deviation and improves surface quality.

[0020] The present invention is further configured as follows: pipelines are provided on the rear side of the top of the hollow cylinder and the top and bottom of the outer hollow collar, and the side of the pipeline close to the air inlet pipe and the air outlet pipe is connected to the two respectively.

[0021] By adopting the above technical solution, the gas circuit can be connected by setting up pipelines, so that part of the cooling gas can enter the rotating component to provide driving power for the rotating component, thereby achieving the effect of cooling and shaping the cable protection tube at the same time.

[0022] The present invention is further configured as follows: the inner walls of the hollow cylinder and the inner hollow sleeve ring are both provided with flow guide holes arranged in an arc shape, and the two flow guide holes are connected, and the flow guide holes are arranged in the opposite direction to the push plate.

[0023] By adopting the above technical solution, by setting the guide holes, the gas can be guided in the flow path of the hollow ring, so that it can form a rotating airflow, so that the push plate can drive the inner rotating plate to rotate.

[0024] The present invention is further configured as follows: the inner rotating plate, the connecting ring and the outer rotating plate are arranged in an I-shape as a whole, and sealing members are arranged inside the inner rotating plate and the outer rotating plate on the opposite side, and the sealing member is in rotational contact with the side close to the hollow sleeve.

[0025] By adopting the above technical solution and the above arrangement, during the rotation of the rotating assembly, the inner rotating plate, the connecting ring and the outer rotating plate of the I-shaped structure cooperate with each other to make the force transmission more uniform and stable, thereby ensuring the overall rotation balance, and the seal forms a seal between the hollow sleeve ring and the inner rotating plate and the outer rotating plate to prevent air from leaking from the rotating gap.

[0026] (III) Beneficial effects Compared with the prior art, the present invention provides an MPP cable protection tube extrusion processing device, which has the following beneficial effects: The MPP cable protection tube extrusion processing device is provided with a cooling structure and a shaping structure. The cooling structure first pre-cools the extruded cable protection tube immediately to rapidly reduce its temperature, reduce the fluidity of the material, and effectively reduce its residence time in a high temperature and softened state, and reduce the possibility of deformation, sagging and other problems due to lack of immediate cooling, thereby creating favorable conditions for the size control and shape shaping of the shaping structure. The shaping structure then rolls and corrects the size of the cable protection tube during the cooling process, and utilizes the characteristic that the cable protection tube gradually hardens during the cooling process to more accurately fix its size. The two work together to form an efficient cable protection tube post-processing process, thereby improving product quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the cooling structure in the present invention; Figure 3 It is a schematic diagram of the precooling component structure in the present invention; Figure 4 It is a schematic diagram of the connection between the sealing shell and the local structure of the sealing strip in the present invention; Figure 5 It is a schematic diagram of the connection between the shaping structure and the extrusion die in the present invention; Figure 6 It is a schematic diagram of the use of the rolling assembly and the rotating assembly in the present invention; Figure 7 It is a schematic diagram of the connection between the inner rotating assembly and the hollow cylinder in the present invention; Figure 8It is a cross-sectional schematic diagram of the rotating component structure in the present invention.

[0028] In the figure: 1. Extruder body; 2. Screw auger; 3. Extrusion die; 4. Cooling structure; 41. Fixed shell; 42. Precooling assembly; 421. Connecting shell; 422. Heat-conducting ring; 423. Cooling ring; 424. Cooling cavity; 425. Heat-conducting rod; 426. Heat dissipation fin; 43. Sealing shell; 44. Sealing strip; 45. Inlet pipe; 46. Outlet pipe; 5. Shaping structure; 51. Hollow cylinder; 52 , mounting shell; 53, rotating assembly; 531, hollow sleeve; 532, inner rotating plate; 533, connecting ring; 534, outer rotating plate; 535, push plate; 54, rolling assembly; 541, pressure roller; 542, telescopic rod; 543, pressure spring; 6, elastic skeleton; 7, shaft; 8, turntable; 9, connecting column; 10, connecting plate; 11, blocking piece; 12, fixing ring; 13, guide hole; 14, sealing piece. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1. Please refer to Figure 1-4 , an MPP cable protection tube extrusion processing device, comprising an extruder body 1, a spiral auger 2 is rotatably connected inside the extruder body 1, an extrusion die 3 is bolted to the front side of the extruder body 1, and a cooling structure 4 is bolted to the front side of the extruder body 1; The cooling structure 4 includes a fixed shell 41, a pre-cooling component 42 is bolted to the rear side of the fixed shell 41, and a sealing shell 43 is bolted inside the fixed shell 41, and sealing strips 44 are provided on the front and rear sides of the sealing shell 43, and the rear side of the pre-cooling component 42 is bolted to the extruder body 1, and the top and bottom of the sealing shell 43 and the pre-cooling component 42 are respectively connected with an air inlet pipe 45 and an air outlet pipe 46. By setting the cooling structure 4, in the initial stage of extrusion of the cable protection tube, the pre-cooling component 42 pre-cools the just-extruded cable protection tube, and the subsequent cooling gas flows in the cavity formed between the sealing shell 43 and the cable protection tube to achieve secondary cooling, which effectively reduces its residence time in a high temperature and softened state, and reduces the possibility of deformation, sagging and other problems due to lack of immediate cooling, which helps the subsequent shaping structure 5 to maintain the dimensional stability of the cable protection tube in the initial stage, laying the foundation for subsequent precise molding.

[0031] The precooling assembly 42 includes a connecting shell 421, and the connecting shell 421 is bolted between the fixed shell 41 and the opposite side of the extruder body 1, the front side of the inner wall of the connecting shell 421 is bolted with a heat-conducting ring 422, and the front side of the surface of the connecting shell 421 is sleeved with a cooling ring 423, and a cooling cavity 424 is provided inside the cooling ring 423, and the cooling cavity 424 is respectively connected to the air inlet pipe 45 and the air outlet pipe 46, and a heat-conducting rod 425 is provided inside the heat-conducting ring 422, and the side of the heat-conducting rod 425 away from the heat-conducting ring 422 passes through the interior of the connecting shell 421 and extends to the cooling cavity Inside 424, a heat conducting rod 425 is located in the cooling chamber 424 and is bolted with a heat dissipation fin 426 on one side thereof. By setting up a pre-cooling assembly 42, part of the cooling gas is allowed to flow into the cooling chamber 424 through the air inlet pipe 45, and the heat of the cable protection tube is guided to the heat dissipation fin 426 through the heat conducting ring 422 and the heat conducting rod 425, and the heat is dissipated in the cooling chamber 424 through the heat dissipation fin 426, so that the cooling gas can exchange heat with the heat and take away the heat of the cable protection tube, thereby improving the pre-cooling efficiency, allowing the cable protection tube to cool down quickly, and reducing the adverse effects under high temperature conditions.

[0032] Among them, the number of heat-conducting rods 425 and heat-dissipating fins 426 are both set to be several, and are respectively evenly distributed in a ring shape inside the heat-conducting ring 422 and the cooling cavity 424. The interior of the heat-dissipating fins 426 is set to be a porous structure. By setting the number of heat-conducting rods 425 and heat-dissipating fins 426 to be several and distributed in a ring shape, the uniform conduction and dissipation of heat in the circumferential direction of the cable protection tube is ensured, and the difference in physical properties or deformation of the cable protection tube caused by local uneven cooling is avoided, thereby ensuring the consistency of product quality. The porous structure of the heat-dissipating fins 426 is conducive to the formation of turbulence of the cooling gas inside it, thereby enhancing the heat exchange effect between the gas and the heat-dissipating fins 426, and at the same time, the heat can be more evenly distributed and transferred inside the heat-dissipating fins 426, thereby improving the heat dissipation uniformity and efficiency of the entire pre-cooling component 42.

[0033] Among them, the sealing strip 44 is arranged in an arc shape, and the front and rear sealing strips 44 are arranged symmetrically. A plurality of elastic skeletons 6 are arranged inside the sealing strip 44 away from the sealing shell 43. The arc-shaped sealing strip 44 is designed to be compatible with the shape of the cable protection tube, ensuring that a good sealing effect can be provided when the cable protection tube passes through to prevent leakage of cooling gas. At the same time, the internal elastic skeleton 6 enables the sealing strip 44 to have a certain elastic deformation ability, and can maintain sealing performance when the cable protection tube is slightly deformed or has a certain size fluctuation, thereby ensuring the stability of the cooling process.

[0034] Among them, the bottom of the sealing shell 43 is rotatably connected to the shaft rod 7, and the left side of the shaft rod 7 is bolted with a turntable 8, the bottom of the left side of the turntable 8 is bolted with a connecting column 9, and the surface of the connecting column 9 is rotatably sleeved with a connecting plate 10, and the bottom of the connecting plate 10 is rotatably connected to a plugging piece 11, and the surface of the plugging piece 11 contacts the inner wall of the air outlet pipe 46, and the surface of the turntable 8 is sleeved with a fixing ring 12, and the surface of the fixing ring 12 is provided with a ring-shaped texture. Through the above arrangement, during the movement of the cable protection tube, the friction force with the surface texture of the fixing ring 12 will be used to drive the fixing ring 12 and the turntable 8 to rotate, so that the turntable 8 drives the connecting column 9 to rotate, and the connecting column 9 drives the plugging piece 11 to move up and down in the air outlet pipe 46 through the connecting plate 10, so that the plugging piece 11 can periodically realize or release the closure of the air outlet pipe 46, thereby slowing down the residence time of the cooling gas in the sealing shell 43 and improving the cooling effect of the cable protection tube.

[0035] Working principle of this embodiment: When the extruder body 1 starts to extrude the cable protection tube, the cooling air source is turned on at the same time, and the cooling gas enters the cooling structure 4 through the air inlet pipe 45. Part of the cooling gas first enters the cooling cavity 424 of the pre-cooling component 42, and the heat of the cable protection tube is transferred to the heat conducting rod 425 through the heat conducting ring 422, and then transferred to the heat dissipating fin 426 by the heat conducting rod 425, so that the cooling gas and the heat dissipated by the heat dissipating fin 426 are heat exchanged, and the porous structure of the heat dissipating fin 426 causes the cooling gas to form turbulence inside it, thereby enhancing the heat exchange effect, allowing the cable protection tube to cool down quickly, reducing the adverse effects under high temperature conditions, and the cable protection tube that has been initially cooled is cooled down. The tube will enter the space formed by the sealing shell 43 and the sealing strip 44, and another part of the cooling gas will fill the space, so that the cooling gas can fully contact the cable protection tube and perform secondary cooling on it. During the movement of the cable protection tube, the friction force with the surface texture of the fixing ring 12 will be used to drive the fixing ring 12 and the turntable 8 to rotate, so that the turntable 8 drives the connecting column 9 to rotate, and the connecting column 9 drives the blocking piece 11 to move up and down in the air outlet pipe 46 through the connecting plate 10, so that the blocking piece 11 can periodically realize or release the closure of the air outlet pipe 46, thereby reducing the residence time of the cooling gas in the sealing shell 43 and improving the cooling effect of the cable protection tube.

[0036] Example 2. Reference Figure 5-8, an MPP cable protection tube extrusion processing device also includes a shaping structure 5, wherein the shaping structure 5 includes a hollow cylinder 51, the hollow cylinder 51 is bolted to the front side of the extrusion die 3, and the front side of the hollow cylinder 51 passes through the interior of the pre-cooling component 42 and the fixed shell 41, the front side of the fixed shell 41 is bolted with a mounting shell 52, the front side of the hollow cylinder 51 extends to the interior of the mounting shell 52, the inner wall of the mounting shell 52 and the surface of the hollow cylinder 51 are both sleeved with two groups of rotating components 53, and the inner and outer rotating components 53 are arranged on opposite sides. The inner and outer rotating components 53 are arranged in opposite directions. By setting the shaping structure 5, the size of the cable protection tube is fixed and the shape is optimized during its cooling process. Through the synergistic effect between the rotating component 53, the rolling component 54 and the hollow cylinder 51, the dimensional deviation caused by the fluidity of the high-temperature material can be effectively corrected, so that the dimensional parameters such as the outer diameter and wall thickness of the cable protection tube meet the standard requirements, while ensuring its circularity and straightness, and improving the molding accuracy and appearance quality of the product.

[0037] The rotating assembly 53 includes a hollow collar 531, and the side of the hollow collar 531 close to the inner wall of the hollow cylinder 51 and the mounting shell 52 is connected to the two respectively, the inner rotation plate 532 is rotatably connected to the inside of the hollow collar 531, and a connecting ring 533 is bolted to one side of the inner rotation plate 532, one side of the connecting ring 533 extends to the outside of the hollow collar 531 and is bolted to an outer rotation plate 534, the inner rotation plate 532 and the outer rotation plate 534 are in rotational contact with the side close to the hollow collar 531, the inner wall of the inner rotation plate 532 is annularly bolted with a plurality of inclined push plates 535, the outer rotation plate 534 is close to the roller pressing assembly One side of the component 54 is bolted to it, and by setting the rotating component 53, when the cooling gas passes through the hollow cylinder 51 and the pipeline into the inner and outer hollow rings 531, a rotating airflow will be generated, which can push the push plate 535, so that the push plate 535 synchronously drives the inner rotating plate 532 to rotate in the hollow ring 531, and synchronously drives the outer rotating plate 534 and the rolling component 54 to rotate through the connecting ring 533. Therefore, the internal rolling component 54 and the external rolling component 54 can rotate around the inner and outer walls of the cable protection tube at the same time, so that the rolling component 54 rolls the cable protection tube, corrects the dimensional deviation and improves the surface quality.

[0038] Among them, the rolling assembly 54 includes a pressing roller 541, and a telescopic rod 542 is bolted to the side of the pressing roller 541 close to the outer rotating plate 534, and the telescopic rod 542 is bolted to the side of the outer rotating plate 534 close to the outer rotating plate 534. A pressing spring 543 is sleeved on the surface of the telescopic rod 542, and the side of the pressing spring 543 close to the pressing roller 541 and the outer rotating plate 534 is respectively connected to the two. By setting the rolling assembly 54, when the cable protection tube passes through the rolling assembly 54, the pressing roller 541 contacts the surface of the cable protection tube. If the size of the cable protection tube changes, the telescopic rod 542 expands and contracts under the action of the pressing spring 543, driving the pressing roller 541 to adjust its position, so that the pressing roller 541 always applies appropriate pressure to the cable protection tube. In this process, the pressing roller 541 rolls the cable protection tube through rolling friction, corrects the size deviation and improves the surface quality.

[0039] Among them, pipelines are provided on the rear side of the top of the hollow cylinder 51 and the top and bottom of the outer hollow ring 531, and the side of the pipeline close to the air inlet pipe 45 and the air outlet pipe 46 is connected to the two respectively. By setting the pipeline, the air circuit can be connected, so part of the cooling gas can enter the rotating component 53 to provide driving power for the rotating component 53, thereby achieving the effect of shaping the cable protection tube while cooling.

[0040] Among them, the inner walls of the hollow cylinder 51 and the inner hollow ring 531 are both provided with arc-shaped guide holes 13, and the two guide holes 13 are connected. The guide holes 13 and the push plate 535 are set in the opposite direction. By setting the guide holes 13, the gas can be guided in the flow path of the hollow ring 531, so that it can form a rotating airflow, so that the push plate 535 can drive the inner rotating plate 532 to rotate.

[0041] Among them, the inner rotating plate 532, the connecting ring 533 and the outer rotating plate 534 are arranged in an I-shape as a whole, and the inner rotating plate 532 and the outer rotating plate 534 are provided with seals 14 inside on the opposite sides, and the seal 14 is close to the side of the hollow ring 531 and is in rotational contact with it. Through the above arrangement, during the rotation of the rotating component 53, the inner rotating plate 532, the connecting ring 533 and the outer rotating plate 534 of the I-shaped structure cooperate with each other to make the force transmission more uniform and stable, thereby ensuring the overall rotation balance, and the seal 14 forms a seal between the hollow ring 531 and the inner rotating plate 532 and the outer rotating plate 534 to prevent air from leaking from the rotating gap.

[0042] Working principle of this embodiment: during cooling, part of the cooling gas enters the hollow cylinder 51 and the outer hollow collar 531 through the pipeline, and the gas in the hollow cylinder 51 enters the inner hollow collar 531 through the guide hole 13, and under the guidance of the guide hole 13, the gas forms a rotating airflow in the hollow collar 531, and the rotating airflow pushes the push plate 535 inclined on the inner wall of the inner rotating plate 532, so that the push plate 535 drives the inner rotating plate 532 to rotate in the hollow collar 531, and the inner rotating plate 532 drives the outer rotating plate 534 to rotate synchronously through the connecting ring 533, thereby causing the rolling assembly 54 connected to the outer rotating plate 534 to rotate around the outer wall of the cable protection tube, and at the same time When the cable protection tube passes through the rolling assembly 54, the pressing roller 541 contacts the surface of the cable protection tube. If the size of the cable protection tube changes, the telescopic rod 542 retracts and contracts under the action of the pressing spring 543, driving the pressing roller 541 to adjust its position, so that the pressing roller 541 always applies appropriate pressure to the cable protection tube. In this process, the pressing roller 541 rolls the cable protection tube through rolling friction, corrects dimensional deviation and improves surface quality.

[0043] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to the present embodiment as needed. Although the embodiments of the present invention have been shown and described, it is understandable to those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An MPP cable protection tube extrusion processing device, comprising an extruder body (1), characterized in that: The extruder body (1) is rotatably connected to a spiral auger (2), and the front side of the extruder body (1) is bolted to an extrusion die (3), the front side of the extruder body (1) is bolted to a cooling structure (4), and the front side of the cooling structure (4) is bolted to a shaping structure (5), and the rear side of the shaping structure (5) penetrates the cooling structure (4) and is bolted to the extrusion die (3); The cooling structure (4) comprises a fixed shell (41), a precooling assembly (42) is bolted to the rear side of the fixed shell (41), and a sealing shell (43) is bolted inside the fixed shell (41), a sealing strip (44) is provided on the front and rear sides of the sealing shell (43), the rear side of the precooling assembly (42) is bolted to the extruder body (1), and the top and bottom of the sealing shell (43) and the precooling assembly (42) are respectively connected to an air inlet pipe (45) and an air outlet pipe (46); The shaping structure (5) comprises a hollow cylinder (51), the hollow cylinder (51) being bolted to the front side of the extrusion die (3), and the front side of the hollow cylinder (51) passing through the interior of the precooling assembly (42) and the fixed shell (41), the front side of the fixed shell (41) being bolted to a mounting shell (52), the front side of the hollow cylinder (51) extending to the interior of the mounting shell (52), the inner wall of the mounting shell (52) and the surface of the hollow cylinder (51) being sleeved with two groups of rotating assemblies (53), the inner and outer rotating assemblies (53) being arranged on opposite sides thereof with rolling assemblies (54), and the inner and outer rotating assemblies (53) being arranged opposite to each other.

2. The MPP cable protection tube extrusion processing device according to claim 1, characterized in that: The precooling assembly (42) comprises a connecting shell (421), and the connecting shell (421) is bolted between the fixed shell (41) and the opposite side of the extruder body (1); a heat-conducting ring (422) is bolted to the front side of the inner wall of the connecting shell (421), and a cooling ring (423) is sleeved on the front side of the surface of the connecting shell (421); a cooling cavity (424) is provided inside the cooling ring (423), and the cooling cavity (424) is respectively connected to the air inlet pipe (45) and the air outlet pipe (46); a heat-conducting rod (425) is arranged inside the heat-conducting ring (422), and the side of the heat-conducting rod (425) away from the heat-conducting ring (422) passes through the interior of the connecting shell (421) and extends to the interior of the cooling cavity (424); and a heat dissipation fin (426) is bolted to the side of the heat-conducting rod (425) in the cooling cavity (424).

3. The MPP cable protection tube extrusion processing device according to claim 2 is characterized in that: The number of the heat-conducting rods (425) and the heat-dissipating fins (426) is multiple and they are evenly distributed in a ring shape inside the heat-conducting ring (422) and the cooling cavity (424), respectively. The interior of the heat-dissipating fins (426) is arranged in a porous structure.

4. The MPP cable protection tube extrusion processing device according to claim 1, characterized in that: The sealing strip (44) is arranged in an arc shape, and the front and rear sealing strips (44) are arranged symmetrically. A plurality of elastic frames (6) are arranged inside the sealing strip (44) on a side away from the sealing shell (43).

5. The MPP cable protection tube extrusion processing device according to claim 1, characterized in that: The bottom of the sealing shell (43) is rotatably connected to a shaft (7), and a rotating disk (8) is bolted to the left side of the shaft (7), a connecting column (9) is bolted to the bottom of the left side of the rotating disk (8), and a connecting plate (10) is rotatably sleeved on the surface of the connecting column (9), a blocking member (11) is rotatably connected to the bottom of the connecting plate (10), and the surface of the blocking member (11) contacts the inner wall of the air outlet pipe (46), a fixing ring (12) is sleeved on the surface of the rotating disk (8), and the surface of the fixing ring (12) is provided with a ring-shaped pattern.

6. The MPP cable protection tube extrusion processing device according to claim 1, characterized in that: The rotating assembly (53) comprises a hollow collar (531), and one side of the hollow collar (531) close to the inner wall of the hollow cylinder (51) and the mounting shell (52) is respectively connected to the two, the interior of the hollow collar (531) is rotatably connected to an inner rotating plate (532), and one side of the inner rotating plate (532) is bolted to a connecting ring (533), one side of the connecting ring (533) extends to the outside of the hollow collar (531) and is bolted to an outer rotating plate (534), the inner rotating plate (532) and the outer rotating plate (534) are in rotational contact with the hollow collar (531) at one side close to the inner wall of the inner rotating plate (532), a plurality of tilted push plates (535) are bolted to the inner wall of the inner rotating plate (532) in a ring shape, and the outer rotating plate (534) is bolted to the rolling assembly (54) at one side close to the rolling assembly (54).

7. The MPP cable protection tube extrusion processing device according to claim 6, characterized in that: The rolling assembly (54) comprises a pressing roller (541), and a telescopic rod (542) is bolted to a side of the pressing roller (541) close to the outer rotating plate (534), and a side of the telescopic rod (542) close to the outer rotating plate (534) is bolted to it, and a pressing spring (543) is sleeved on the surface of the telescopic rod (542), and a side of the pressing spring (543) close to the pressing roller (541) and the outer rotating plate (534) is respectively connected to both.

8. The MPP cable protection tube extrusion processing device according to claim 6, characterized in that: Pipelines are provided at the connection between the extrusion die (3) and the spiral auger (2) and at the top and bottom of the outer hollow collar (531), and the side of the pipeline close to the air inlet pipe (45) and the air outlet pipe (46) is connected to the two pipes respectively.

9. The MPP cable protection tube extrusion processing device according to claim 6, characterized in that: The inner walls of the hollow cylinder (51) and the inner hollow collar (531) are both provided with an arc-shaped flow guide hole (13), and the two flow guide holes (13) are connected to each other. The flow guide hole (13) and the push plate (535) are arranged in opposite directions.

10. The MPP cable protection tube extrusion processing device according to claim 6, characterized in that: The inner rotating plate (532), the connecting ring (533) and the outer rotating plate (534) are arranged in an I-shape as a whole, and sealing members (14) are arranged inside opposite sides of the inner rotating plate (532) and the outer rotating plate (534), and the sealing member (14) is in rotational contact with a side close to the hollow collar (531).

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