A cable insulation coating apparatus

Abstract

The application is suitable for the technical field of cable production, and provides a cable insulation layer coating equipment, which comprises an equipment base, a side rack one on the equipment base, a blanking cylinder and a supporting cylinder. A storage bin is fixed to the upper end of the blanking cylinder, and the lower end is connected with the supporting cylinder through a discharging pipe. A rotatable coating pipe is arranged in the supporting cylinder and is driven to rotate by a driving assembly one. An annular groove is arranged on the outer wall of the coating pipe, an annular heating net is arranged in the coating pipe, and a plurality of extrusion holes are distributed in the circumferential direction. An extrusion shaft is arranged in the middle part of the blanking cylinder, is provided with helical blades, and is driven to rotate by a driving assembly two. A heating rod is arranged at the lower end of the extrusion shaft and is connected with the annular heating net. The blanking cylinder and the discharging pipe are provided with preheating assemblies. The equipment further comprises a feeding centering assembly and a discharging cooling assembly. The application controls the uniform distribution of molten plastic and the centering support of the cable core, combines the rotating coating and water cooling shaping technologies, and significantly improves the quality and production efficiency of the insulation layer coating.

Description

Technical Field

[0001] This invention belongs to the field of cable production technology, and in particular relates to a cable insulation layer coating device. Background Technology

[0002] In cable manufacturing, the quality of the insulation layer directly affects the overall performance and service life of the cable. Traditional cable insulation layer coating technologies often face problems such as uneven material distribution, poor control of coating thickness, and low production efficiency. These problems not only affect the electrical performance of the cable but may also lead to safety hazards such as localized overheating and short circuits during use. Therefore, improving the quality of cable insulation layer coating and production efficiency has become one of the goals pursued by the cable manufacturing industry.

[0003] To overcome these challenges, the industry has been continuously exploring and developing new cable insulation coating equipment and technologies. However, problems still exist, such as poor flow and distribution of molten plastic, unreliable centering of the cable core, poor uniformity during the coating process, and slow cooling and setting of the insulation layer. Therefore, there is an urgent need to develop a cable insulation coating device to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] The purpose of this invention is to provide a cable insulation layer coating device, which aims to solve the problems mentioned in the background art.

[0005] This invention is implemented as follows: a cable insulation layer coating device includes a device base and a side frame fixed thereon, and further includes: The feeding cylinder and the support cylinder are respectively fixed on the side frame. The upper end of the feeding cylinder is fixed with a storage bin, and the lower end of the feeding cylinder is fixed with a discharge pipe. The lower end of the discharge pipe is fixedly connected to the support cylinder. The coating tube is rotatably mounted on the inner side of the support cylinder. A drive assembly for driving the coating tube to rotate is also mounted on the feeding cylinder. An annular groove is provided on the outer wall of the coating tube at the connection between the discharge pipe and the support cylinder. An annular heating mesh fixedly connected to the support cylinder is provided in the annular groove. Multiple extrusion holes communicating with the annular groove are also evenly distributed circumferentially on the coating tube. The extrusion shaft is located in the middle of the inner side of the feeding cylinder. Spiral blades are fixed on the extrusion shaft inside the feeding cylinder. The upper end of the extrusion shaft is rotatably connected to the top of the storage silo. A second drive assembly for driving the extrusion shaft to rotate is also installed on the top of the storage silo. A heating rod is also provided at the lower end of the extrusion shaft, and the lower end of the heating rod is fixedly connected to an annular heating mesh. A preheating assembly is also provided at the lower part of the feeding cylinder and on the discharge pipe. Feed centering assembly: A feed centering assembly is installed on the feed side of the covered tube. The feed centering assembly is used to center and support the cable core input into the covered tube. The discharge cooling assembly is installed on the discharge side of the covering tube. The discharge cooling assembly is used to water-cool and shape the cable core covered with insulation layer.

[0006] In a further technical solution, both the annular heating mesh and the annular groove have a central arc-shaped concave structure. The heating rod is coaxially arranged with the discharge pipe and the extrusion shaft, and the upper end of the heating rod extends into the inner side of the extrusion shaft. The extrusion shaft and the heating rod are rotatably connected.

[0007] In a further technical solution, the preheating component includes a heating cone and a heating column. The lower part of the feeding cylinder has a conical structure, and the heating cone is fixedly fitted to the outer side of the lower part of the feeding cylinder. The heating column is fixedly fitted to the outer side of the discharge pipe.

[0008] In a further technical solution, the length of the coating tube is greater than the length of the support cylinder, and the support cylinder is set perpendicular to the discharge tube. The first drive assembly includes a first motor, a motor frame, a first gear, and a second gear. The second gear is fixed on the feed side of the coating tube, the motor frame is fixed on the discharge cylinder, the first motor is fixed on the motor frame, and the output end of the first motor is fixed with a first gear that meshes with the second gear. The second drive assembly includes a second motor fixed to the top of the storage hopper and driven by the extrusion shaft.

[0009] In a further technical solution, the connection between the feeding cylinder and the storage bin is located on the extrusion shaft and an auxiliary support ring is rotatably installed. Multiple auxiliary support rods are evenly distributed and fixed on the outer circumference of the auxiliary support ring, and the outer ends of the auxiliary support rods are fixedly connected to the inner wall of the feeding cylinder or the storage bin.

[0010] A further technical solution includes a feeding centering assembly comprising multiple feeding centering cavities evenly distributed circumferentially on the feeding side of the coating tube. A support plate is slidably disposed within the feeding centering cavity. Several support balls are installed on the inner side of the support plate. A cylinder is fixed to the outer side of the support plate. The other end of the cylinder is fixedly connected to the outer end of the feeding centering cavity. An air pump is also fixed on the feeding cylinder. An air pipe is connected to the outlet of the air pump. The other end of the air pipe is connected to an annular disk rotatably connected to the end of the coating tube. An air cavity is opened at the end of the coating tube corresponding to the annular disk. The air pipe communicates with the air cavity. The cylinder is also connected to the air cavity through an air pipe.

[0011] In a further technical solution, a support ring is fixed on the drive component, and the support ring is also connected and fixed to the annular disk through multiple support columns arranged circumferentially. The air pipe is also fixedly connected to the support ring. An auxiliary heating layer is also provided on the side of the support plate near the support ball.

[0012] In a further technical solution, an elastic sealing ring that is in close contact with the surface of the cable core is installed on the inner side of the coating tube between the feeding center cavity and the extrusion hole.

[0013] A further technical solution includes a cooling chamber on the discharge side of the coated pipe, a spiral plate fixed inside the cooling chamber, an inlet ring and an outlet ring rotatably mounted on the outer side of the coated pipe, and multiple fixing rods circumferentially distributed and fixed on the outer side of the inlet ring and the outlet ring. One end of the fixing rod is fixedly connected to the end of the support cylinder. Several outlet holes are circumferentially distributed on the side wall of the coated pipe corresponding to one end of the cooling chamber. The inner cavity of the outlet ring is connected to one end of the cooling chamber through the outlet holes. Several inlet holes are circumferentially distributed on the side wall of the coated pipe corresponding to the other end of the cooling chamber. The inner cavity of the inlet ring is connected to the other end of the cooling chamber through the inlet holes. Cooling water inlet pipe and cooling water outlet pipe are respectively connected to the inlet ring and the outlet ring.

[0014] A further technical solution to the cable insulation coating equipment includes a centering support assembly for centering and supporting the cable after insulation coating. The centering support assembly includes a centering ring coaxial with the coating tube. A side frame two is fixed to the outside of the centering ring. The lower end of the side frame two is fixed to the equipment base. Multiple cylinders two are circumferentially distributed and fixed on the centering ring. A wheel frame is fixed to the telescopic end of the cylinder two. A centering wheel with a central arc-shaped concave centering wheel is rotatably mounted on the wheel frame. An air pump two is also installed on the equipment base. The outlet of the air pump two is connected to a ring-shaped air pipe three through an air pipe four. The cylinder two is also connected to the air pipe three.

[0015] The cable insulation layer coating device provided by this invention has the following beneficial effects: The storage hopper stores plastic granules. The cable core to be insulated passes through the coating tube. The annular heating grid, heating rod, and preheating assembly are activated. As the drive assembly two drives the extrusion shaft to rotate, the spiral blades extrude and convey the plastic granules downwards. After melting through the annular heating grid, heating rod, and preheating assembly, the granules are evenly distributed through the annular heating grid and enter the extrusion orifice, where they are discharged to coat the surface of the cable core. Furthermore, the drive assembly one can drive the coating tube to rotate according to actual processing needs, ensuring that the molten insulation material discharged from the extrusion orifice evenly coats the surface of the cable core, improving molding quality. The feeding centering assembly provides centered support for the cable core entering the coating tube, while the discharge cooling assembly performs water cooling and shaping of the insulated cable core, improving the accuracy of the insulation coating and allowing the insulation layer to cool and solidify rapidly, forming a stable insulation structure.

[0016] In summary, this invention significantly improves the quality and production efficiency of insulation layer coating by controlling the uniform distribution of molten plastic and the central support of the cable core, combined with rotational coating and water-cooling shaping technology. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the cable insulation coating device provided in an embodiment of the present invention; Figure 2 for Figure 1 Another perspective structural diagram; Figure 3 A partial isometric view of a cable insulation layer covering device provided in an embodiment of the present invention; Figure 4 for Figure 3 A magnified structural diagram of part A in the middle; Figure 5 for Figure 3 A magnified structural diagram of part B in the middle section; Figure 6 for Figure 3 A magnified structural diagram of section C; Figure 7 This is a schematic diagram of the centering support component in the cable insulation coating device provided in an embodiment of the present invention.

[0018] In the diagram: 1-Equipment base, 2-Cable core, 3-Support ring, 4-Support column, 5-Air pipe one, 6-Motor one, 7-Motor frame, 8-Air pump one, 9-Feeding cylinder, 10-Storage bin, 11-Replenishment port, 12-Motor two, 13-Side frame one, 14-Gear one, 15-Heating cone, 16-Cooling water outlet pipe, 17-Cooling water inlet pipe, 18-Centering support assembly, 19-Water inlet ring, 20-Fixing rod, 21-Support cylinder, 22-Gear two, 23-Coating pipe, 24-Water outlet ring, 25-Extrusion shaft, 26-Auxiliary support rod, 27-Auxiliary support ring, 28 - Spiral blades, 29- Cooling chamber, 30- Spiral plate, 31- Feeding center chamber, 32- Supporting ball, 33- Support plate, 34- Cylinder 1, 35- Annular heating mesh, 36- Heating rod, 37- Annular groove, 38- Extrusion hole, 39- Heating column, 40- Discharge pipe, 41- Annular disc, 42- Air chamber, 43- Air pipe 2, 44- Water outlet, 45- Water inlet, 46- Centering ring, 47- Air pipe 3, 48- Cylinder 2, 49- Wheel frame, 50- Centering wheel, 51- Side frame 2, 52- Air pipe 4, 53- Air pump 2, 54- Elastic sealing ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0021] like Figure 1-4 As shown, a cable insulation coating device according to an embodiment of the present invention includes a device base 1 and a side frame 13 fixed thereon, and further includes: The feeding cylinder 9 and the support cylinder 21 are respectively fixed on the side frame 13. The upper end of the feeding cylinder 9 is fixed with a storage bin 10, and the lower end of the feeding cylinder 9 is fixed with a discharge pipe 40. The lower end of the discharge pipe 40 is fixedly connected to the support cylinder 21. The inner side of the support cylinder 21 is rotatably mounted with a coating tube 23. The feeding cylinder 9 is also equipped with a drive assembly for driving the coating tube 23 to rotate. The outer wall of the coating tube 23 is provided with an annular groove 37 at the connection between the discharge pipe 40 and the support cylinder 21. An annular heating mesh 35 fixedly connected to the support cylinder 21 is provided in the annular groove 37. The coating tube 23 is also provided with a plurality of extrusion holes 38 that are evenly distributed around the circumference and communicate with the annular groove 37. The extrusion shaft 25 is located in the middle of the inner side of the feeding cylinder 9. A spiral blade 28 is fixed on the extrusion shaft 25 inside the feeding cylinder 9. The upper end of the extrusion shaft 25 is rotatably connected to the top of the storage silo 10. A second drive assembly for driving the extrusion shaft 25 to rotate is also installed on the top of the storage silo 10. A heating rod 36 is also provided at the lower end of the extrusion shaft 25. The lower end of the heating rod 36 is fixedly connected to the annular heating mesh 35. A preheating assembly is also provided at the lower part of the feeding cylinder 9 and on the discharge pipe 40. Feed centering component: A feed centering component is installed on the feed side of the covering tube 23. The feed centering component is used to center and support the cable core 2 input into the covering tube 23. The discharge cooling assembly is installed on the discharge side of the covering tube 23. The discharge cooling assembly is used to water-cool and shape the cable core 2 covered with insulation layer.

[0022] In this embodiment of the invention, the storage bin 10 is used to store plastic granules (such as cross-linked polyethylene). The cable core 2 to be coated with the insulation layer passes through the coating tube 23 via a traction take-up device (not shown, conventional technology can be used). The annular heating net 35, heating rod 36, and preheating component are activated. As the driving component two drives the extrusion shaft 25 to rotate, the spiral blades 28 can extrude and convey the plastic granules downward. After being melted by the annular heating net 35, heating rod 36, and preheating component, the molten insulation material is evenly distributed through the annular heating net 35 and enters the extrusion hole 38, and is discharged through the extrusion hole 38 to coat the surface of the cable core 2. In addition, the driving component one can drive the coating tube 23 to rotate according to the actual processing needs, so that the molten insulation material discharged from the extrusion hole 38 evenly coats the surface of the cable core 2, improving the molding quality. The feeding centering component is used to center and support the cable core 2 input into the coating tube 23, and the discharge cooling component is used to water-cool and shape the cable core 2 coated with the insulation layer, improving the accuracy of the insulation layer coating and enabling the insulation layer to cool and solidify quickly, forming a stable insulation structure.

[0023] In summary, by controlling the uniform distribution of molten plastic and the central support of the cable core 2, combined with rotational wrapping and water-cooling shaping technology, this invention significantly improves the quality and production efficiency of insulation layer wrapping.

[0024] like Figure 1-4 As shown in the preferred embodiment of the present invention, both the annular heating mesh 35 and the annular groove 37 are centrally arc-shaped concave structures, which increases the heating area of ​​the annular heating mesh 35. The annular heating mesh 35 also allows the molten insulating material to pass through evenly, and the annular groove 37 allows the molten insulating material to be discharged through the extrusion hole 38, and ensures that the rotation of the covering tube 23 will not affect the annular heating mesh 35.

[0025] The heating rod 36 is coaxially arranged with the discharge pipe 40 and the extrusion shaft 25, and the upper end of the heating rod 36 extends into the inner side of the extrusion shaft 25. The extrusion shaft 25 and the heating rod 36 are rotatably connected, thereby increasing the effective heating length of the heating rod 36.

[0026] The preheating assembly includes a heating cone 15 and a heating column 39. The lower part of the feeding cylinder 9 has a conical structure, and the heating cone 15 is fixedly attached to the outer side of the lower part of the feeding cylinder 9. The heating column 39 is fixedly attached to the outer side of the discharge pipe 40. Effective preheating can be achieved through the heating cone 15 and the heating column 39, followed by thorough melting through the heating rod 36 and the annular heating mesh 35. Preferably, a heat insulation layer (not shown) is also provided on the outer side of the heating cone 15 and the heating column 39, so that the heat generated by the heating cone 15 and the heating column 39 is fully utilized.

[0027] Taking cross-linked polyethylene plastic as an example, its melting temperature is usually between 220 and 260°C. The heating temperature of the preheating components (heating cone 15 and heating column 39) can be controlled between 150 and 200°C to avoid premature melting of plastic particles leading to blockage; the temperature of the annular heating mesh 35 and the heating rod 36 is set between 200 and 300°C to ensure that the flowability of the molten plastic meets the extrusion requirements.

[0028] The length of the covering tube 23 is greater than the length of the support tube 21, and the support tube 21 is set perpendicular to the discharge tube 40. The drive assembly includes a motor 6, a motor frame 7, a gear 14 and a gear 22. The gear 22 is fixed on the feed side of the covering tube 23. The motor frame 7 is fixed on the discharge tube 9. The motor 6 is fixed on the motor frame 7. The output end of the motor 6 is fixed with a gear 14 that meshes with the gear 22.

[0029] The second drive assembly includes a second motor 12 fixed to the top of the storage bin 10 and connected to the extrusion shaft 25. The top of the storage bin 10 is also provided with a feeding port 11, through which plastic can be conveniently replenished.

[0030] The connection between the feed cylinder 9 and the storage bin 10 is located on the extrusion shaft 25, and an auxiliary support ring 27 is rotatably installed. Multiple auxiliary support rods 26 are evenly distributed and fixed on the outer circumference of the auxiliary support ring 27. The outer ends of the auxiliary support rods 26 are fixedly connected to the inner wall of the feed cylinder 9 or the storage bin 10, so as to provide stable support for the extrusion shaft 25 and make the extrusion conveying stable and reliable.

[0031] Two side frames 13 can be set up so that the side frames 13 on the front and rear sides of the feed cylinder 9 and the support cylinder 21 can play a role in stabilizing the support. The side frames 13 can be F-shaped.

[0032] like Figure 1-6As shown, in a preferred embodiment of the present invention, the feeding centering assembly includes a plurality of feeding centering cavities 31 evenly distributed circumferentially on the feeding side of the covering tube 23. A support plate 33 is slidably disposed in the feeding centering cavity 31. A plurality of support balls 32 are installed on the inner side of the support plate 33. A cylinder 34 is fixed on the outer side of the support plate 33. The other end of the cylinder 34 is fixedly connected to the outer end of the feeding centering cavity 31. An air pump 8 is also fixed on the feeding cylinder 9. An air pipe 5 is connected to the outlet of the air pump 8. The other end of the air pipe 5 is connected to an annular disk 41 rotatably connected to the end of the covering tube 23. An air cavity 42 is opened at the end of the covering tube 23 corresponding to the annular disk 41. The air pipe 5 communicates with the air cavity 42. The cylinder 34 is also connected to the air cavity 42 through an air pipe 43. The ring disc 41 ensures that the rotation of the covering tube 23 is unaffected. After the air pump 8 pressurizes the air, the gas can pass through the air pipe 5, the air chamber 42, and the air pipe 43 and then act on the cylinder 34 to adjust and control the contact force between the support ball 32 and the cable core 2, thereby achieving a stable and adjustable feeding centering effect.

[0033] Preferably, the drive assembly (specifically fixed to the motor 6, or possibly fixed to other components) also has a support ring 3 fixed to it. The support ring 3 is further connected and fixed to the annular disk 41 via multiple circumferentially distributed support columns 4. The cooperation between the support ring 3 and the support columns 4 further provides stable support to the annular disk 41, improving stability. Furthermore, the air pipe 5 is also fixedly connected to the support ring 3, further enhancing stability.

[0034] Preferably, the support plate 33 is further provided with an auxiliary heating layer (not shown) on the side near the support ball 32, which can preheat the cable core 2, allowing the insulation material to better adhere to the surface of the cable core 2 during wrapping, enhancing the adhesion between the two, reducing defects such as gaps and bubbles caused by loose bonding, thereby improving the overall performance and reliability of the cable, and reducing internal stress. Generally, for common cross-linked polyethylene insulated cables, the preheating temperature of the cable core 2 is usually controlled between 70 and 100°C.

[0035] Preferably, an elastic sealing ring 54 is installed on the inner side of the covering tube 23 between the feeding center cavity 31 and the extrusion hole 38, which is in close contact with the surface of the cable core 2. The elastic sealing ring 54 serves as a separator, while ensuring that the insulating material reliably covers the surface of the cable core 2.

[0036] The discharge cooling assembly includes a cooling chamber 29 opened on the discharge side of the covering pipe 23. A spiral plate 30 is fixedly installed inside the cooling chamber 29. A water inlet ring 19 and a water outlet ring 24 are rotatably installed on the outer side of the covering pipe 23. Multiple fixing rods 20 are also circumferentially distributed and fixed on the outer side of the water inlet ring 19 and the water outlet ring 24. One end of the fixing rod 20 is fixedly connected to the end of the support cylinder 21. Several water outlet holes 44 are circumferentially distributed on the side wall of the covering pipe 23 corresponding to one end of the cooling chamber 29. The inner cavity of the water outlet ring 24 is connected to one end of the cooling chamber 29 through the water outlet holes 44. Several water inlet holes 45 are circumferentially distributed on the side wall of the covering pipe 23 corresponding to the other end of the cooling chamber 29. The inner cavity of the water inlet ring 19 is connected to the other end of the cooling chamber 29 through the water inlet holes 45. Cooling water inlet pipe 17 and cooling water outlet pipe 16 are also connected to the water inlet ring 19 and the water outlet ring 24, respectively. The preparation of cooling water can be achieved using existing publicly available technologies. Through the arrangement of the inlet ring 19 and the outlet ring 24, cooling water can be input and output from the cooling chamber 29 without affecting the rotation of the covering pipe 23. Furthermore, the spiral plate 30 arranged inside the cooling chamber 29 can ensure sufficient flow of cooling water and improve the cooling and shaping effect.

[0037] like Figure 1 and 7 As shown in the preferred embodiment of the present invention, the cable insulation coating equipment further includes a centering support assembly 18 for centering and supporting the cable after insulation coating. The centering support assembly 18 includes a centering ring 46 coaxial with the coating tube 23. A side frame 51 is fixed to the outside of the centering ring 46. The lower end of the side frame 51 is fixed to the equipment base 1. A plurality of cylinders 48 are circumferentially distributed and fixed on the centering ring 46. A wheel frame 49 is fixed to the telescopic end of the cylinders 48. A centering wheel 50 with a central arc-shaped concave centering wheel is rotatably mounted on the wheel frame 49. An air pump 53 is also installed on the equipment base 1. The outlet of the air pump 53 is connected to a ring-shaped air pipe 47 through an air pipe 52. The cylinders 48 are also connected to the air pipe 47. By controlling the air pump 53, multiple centering rings 46 can be synchronously extended and retracted. The reliable support of the cable by the centering wheel 50 ensures that the cable after insulation is centered and outputs. With the setting of the feeding centering component, the coaxiality of the cable core 2 and the insulation layer can be high, thus improving the processing quality.

[0038] Through comparative experiments, under the same production conditions (cable core 2 diameter 10mm, polyethylene material), the equipment of this invention increases the coating speed by 15% and reduces the thickness deviation by 10%. In terms of cooling efficiency, the curing time is shortened by 30% through the design of the spiral plate 30 and the cooling chamber 29.

[0039] The present invention provides a cable insulation layer coating device in the above embodiments, the working principle of which is as follows: Plastic granules (such as cross-linked polyethylene) are stored in storage bin 10 and replenished through replenishment port 11.

[0040] The preheating assembly, consisting of heating cone 15, heating column 39, annular heating mesh 35, and heating rod 36, is activated to initially heat the plastic granules in the feed cylinder 9.

[0041] Subsequently, the second drive assembly drives the extrusion shaft 25 to rotate, and the spiral blades 28 extrude and convey the plastic granules downward, so that they are further melted by the preheating assembly and the heating rod 36.

[0042] The molten plastic material is evenly distributed through the annular heating mesh 35 and enters the extrusion hole 38, and is then extruded onto the surface of the cable core 2 inside the sheathing tube 23.

[0043] The drive component drives the covering tube 23 to rotate according to actual needs, so that the molten plastic is evenly covered on the cable core 2, improving the molding quality.

[0044] The feeding centering component ensures that the cable core 2 fed into the coating tube 23 is centered, guaranteeing uniformity and consistency of the coating. Cylinder 34 achieves this by adjusting the contact force between the support ball 32 and the cable core 2.

[0045] After the cable is fully covered, it undergoes water cooling and shaping via the discharge cooling assembly. The spiral plate 30 inside the cooling chamber 29 ensures sufficient flow of cooling water, accelerates the cooling process, and ensures that the insulation layer quickly solidifies to form a stable structure.

[0046] The centering support assembly 18 is used to support and center the insulated cable, ensuring high coaxiality and improving the quality of the finished product.

[0047] Throughout the process, all components work together, from melting and uniformly distributing the plastic particles to coating and finally cooling and shaping, achieving efficient and high-quality cable insulation coating.

[0048] The control of each component can be achieved using a PLC controller disclosed in the existing technology. There are no specific limitations on the model and circuit connection of each component, and they can be flexibly set in actual applications.

[0049] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve any improvement to the software and methods.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A cable insulation layer coating device, comprising a device base and a side frame fixed thereon, characterized in that, Also includes: The feeding cylinder and the support cylinder are respectively fixed on the side frame. The upper end of the feeding cylinder is fixed with a storage bin, and the lower end of the feeding cylinder is fixed with a discharge pipe. The lower end of the discharge pipe is fixedly connected to the support cylinder. The coating tube is rotatably mounted on the inner side of the support cylinder, and a drive assembly for driving the coating tube to rotate is also mounted on the feeding cylinder; an annular groove is provided on the outer wall of the coating tube at the connection between the discharge pipe and the support cylinder, an annular heating mesh fixedly connected to the support cylinder is provided in the annular groove, and multiple extrusion holes communicating with the annular groove are evenly distributed circumferentially on the coating tube. The extrusion shaft is located in the middle of the inner side of the feeding cylinder. Spiral blades are fixed on the extrusion shaft inside the feeding cylinder. The upper end of the extrusion shaft is rotatably connected to the top of the storage silo. A second drive assembly for driving the extrusion shaft to rotate is also installed on the top of the storage silo. A heating rod is also provided at the lower end of the extrusion shaft. The lower end of the heating rod is fixedly connected to an annular heating mesh. A preheating assembly is also provided at the lower part of the feeding cylinder and on the discharge pipe. Feed centering assembly: A feed centering assembly is installed on the feed side of the covered tube. The feed centering assembly is used to center and support the cable core input into the covered tube. The discharge cooling assembly is installed on the discharge side of the covering tube. The discharge cooling assembly is used to water-cool and shape the cable core covered with insulation layer. Both the annular heating mesh and the annular groove have a central arc-shaped concave structure. The heating rod is coaxially arranged with the discharge pipe and the extrusion shaft, and the upper end of the heating rod extends into the inner side of the extrusion shaft, and the extrusion shaft and the heating rod are rotatably connected. The preheating assembly includes a heating cone and a heating column. The lower part of the feeding cylinder has a conical structure, and a heating cone is fixed to the outer side of the lower part of the feeding cylinder, while a heating column is fixed to the outer side of the discharge pipe. The feeding centering assembly includes multiple feeding centering cavities evenly distributed circumferentially on the feeding side of the covering tube. A support plate is slidably provided in the feeding centering cavity. Several support balls are installed on the inner side of the support plate. A cylinder is fixed on the outer side of the support plate. The other end of the cylinder is fixedly connected to the outer end of the feeding centering cavity. The feeding cylinder is also fixed with an air pump, the outlet of which is connected to an air pipe. The other end of the air pipe is connected to an annular disk that is rotatably connected to the end of the covering tube. The end of the covering tube is provided with an air chamber corresponding to the annular disk. The air pipe is connected to the air chamber. The cylinder is also connected to the air chamber through an air pipe. An elastic sealing ring that is in close contact with the surface of the cable core is also installed on the inner side of the covering tube between the feeding center cavity and the extrusion hole. The discharge cooling assembly includes a cooling chamber opened on the discharge side of the covered tube, and a spiral plate is fixedly fitted inside the cooling chamber. The outer side of the covering tube is rotatably equipped with an inlet ring and an outlet ring. Multiple fixing rods are also circumferentially distributed and fixed on the outer side of the inlet ring and the outlet ring, with one end of the fixing rods fixedly connected to the end of the support cylinder. A plurality of water outlet holes are circumferentially distributed on the side wall of the covering tube corresponding to one end of the cooling chamber, and the inner cavity of the water outlet ring is connected to one end of the cooling chamber through the water outlet holes; A plurality of water inlet holes are circumferentially distributed on the side wall of the covering tube corresponding to the other end of the cooling chamber, and the inner cavity of the water inlet ring is connected to the other end of the cooling chamber through the water inlet holes; The inlet ring and outlet ring are respectively connected to a cooling water inlet pipe and a cooling water outlet pipe.

2. The cable insulation layer coating equipment according to claim 1, characterized in that, The length of the covering tube is greater than the length of the support cylinder, and the support cylinder is set perpendicular to the discharge tube; The drive assembly includes a motor, a motor frame, a gear, and a gear. The gear is fixed to the feed side of the coating tube, the motor frame is fixed to the feed cylinder, the motor is fixed to the motor frame, and the output end of the motor is fixed to a gear that meshes with the gear. The second drive assembly includes a second motor fixed to the top of the storage hopper and connected to the extrusion shaft.

3. The cable insulation layer coating equipment according to claim 2, characterized in that, The connection between the feeding cylinder and the storage bin is located on the extrusion shaft, and an auxiliary support ring is rotatably installed. Multiple auxiliary support rods are evenly distributed and fixed on the outer circumference of the auxiliary support ring, and the outer ends of the auxiliary support rods are fixedly connected to the inner wall of the feeding cylinder or the storage bin.

4. The cable insulation layer coating equipment according to claim 3, characterized in that, The drive assembly is also fixed with a support ring, which is also connected and fixed to the annular disk by multiple support columns arranged circumferentially. The air tube is also fixedly connected to the support ring. The support plate is also provided with an auxiliary heating layer on the side near the support ball.

5. The cable insulation layer coating equipment according to claim 4, characterized in that, The cable insulation coating equipment also includes a centering support assembly for centering and supporting the cable after insulation coating; The centering support assembly includes a centering ring coaxial with the covering tube, a second side frame fixed to the outside of the centering ring, and the lower end of the second side frame fixed to the equipment base. The centering ring is circumferentially fixed with multiple cylinders 2, and the telescopic end of the cylinder 2 is fixed with a wheel frame, on which a centering wheel with a central arc-shaped concave centering wheel is rotatably mounted. The equipment base is also equipped with an air pump two. The outlet of the air pump two is connected to an annular air pipe three through an air pipe four. The cylinder two is also connected to the air pipe three.

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