Cable insulation layer coating equipment

Abstract

The invention is suitable for the technical field of cable production, and provides cable insulation layer coating equipment which comprises an equipment base, a first side rack, a discharging barrel and a supporting barrel, and the first side rack, the discharging barrel and the supporting barrel are arranged on the equipment base. A storage bin is fixed at the upper end of the discharging barrel, and the lower end is connected with the supporting barrel through a discharging pipe. A rotatable wrapping pipe is arranged in the supporting cylinder and driven by a first driving assembly to rotate, an annular groove is formed in the outer wall of the wrapping pipe, an annular heating net is arranged in the annular groove, and a plurality of extrusion holes are distributed in the circumferential direction. The extrusion shaft is located in the middle of the discharging barrel, provided with spiral blades and driven by a second driving assembly to rotate, a heating rod is arranged at the lower end of the extrusion shaft and connected with the annular heating net, and the discharging barrel and the discharging pipe are provided with preheating assemblies. The device further comprises a feeding centering assembly and a discharging cooling assembly. By controlling the uniform distribution of the molten plastic and the centered support of the cable core and combining the rotary coating and water-cooling shaping technology, the coating quality and the production efficiency of the insulating layer are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cable production, and in particular relates to a cable insulation layer covering device. Background Art

[0002] During cable manufacturing, the quality of the insulation coating directly impacts the cable's overall performance and service life. Traditional cable insulation coating technologies often face challenges such as uneven material distribution, poor thickness control, and low production efficiency. These issues not only impact the cable's electrical performance but can also lead to safety hazards such as localized overheating and short circuits during use. Therefore, improving the quality of cable insulation coating and production efficiency has become a key goal of the cable manufacturing industry.

[0003] To overcome these challenges, the industry continues to explore and develop new cable insulation coating equipment and technologies. However, issues 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 persist. Therefore, in response to these challenges, there is an urgent need to develop cable insulation coating equipment that can overcome the shortcomings of current practical applications. Summary of the Invention

[0004] The object of the present invention is to provide a cable insulation layer covering device, aiming to solve the problems mentioned in the above background technology.

[0005] The present invention is implemented as follows: a cable insulation coating device includes a device base and a side frame fixed thereon, and further includes: A feeding cylinder and a supporting cylinder are fixed on the side frame, respectively. A storage bin is fixed on the upper end of the feeding cylinder, and a discharge pipe is fixed on the lower end of the feeding cylinder. The lower end of the discharge pipe is fixedly connected to the supporting cylinder. The cladding tube is rotatably mounted on the inner side of the support tube, and a driving assembly for driving the cladding tube to rotate is also installed on the discharge tube. An annular groove is provided on the outer wall of the cladding tube corresponding to the connection between the discharge tube and the support tube, and an annular heating net fixedly connected to the support tube is provided in the annular groove. The cladding tube is also circumferentially evenly distributed with a plurality of extrusion holes connected to the annular groove. An extrusion shaft is provided in the middle part of the inner side of the discharge barrel, a spiral blade is fixed on the extrusion shaft inside the discharge barrel, the upper end of the extrusion shaft is rotatably connected to the top of the storage bin, and the top of the storage bin is also equipped with a driving component 2 for driving the extrusion shaft to rotate, and a heating rod is further provided at the lower end of the extrusion shaft, and the lower end of the heating rod is fixedly connected to the annular heating network; a preheating component is also provided on the lower part of the discharge barrel and the discharge pipe; A feed centering component is installed on the feed side of the cladding tube, and is used to centrally support the cable core input into the cladding tube; A discharge cooling assembly is installed on the discharge side of the coating tube, and the discharge cooling assembly is used to water-cool and shape the cable core coated with the insulation layer.

[0006] According to a further technical solution, the annular heating net and the annular groove are both arc-shaped concave structures in the middle, 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.

[0007] A further technical solution is that the preheating assembly includes a heating cone and a heating column, the lower part of the discharge barrel is a conical structure, the outer side of the lower part of the discharge barrel is fixed with a heating cone, and the outer side of the discharge pipe is fixed with a heating column.

[0008] A further technical solution is that the length of the coating tube is greater than the length of the supporting tube, and the supporting tube is arranged perpendicular to the discharge tube, the driving component 1 includes a motor 1, a motor frame, a gear 1 and a gear 2, the feeding side of the coating tube is fixed with a gear 2, the discharge tube is fixed with a motor frame, the motor 1 is fixed on the motor frame, and the output end of the motor 1 is fixed with a gear 1 meshing with the gear 2; the driving component 2 includes a motor 2 fixed on the top of the storage bin and transmission connected to the extrusion shaft.

[0009] A further technical solution is that the connection between the discharge barrel and the storage bin is that an auxiliary support ring is rotatably installed on the extrusion shaft, and a plurality of auxiliary support rods are evenly distributed and fixed on the outer side of the auxiliary support ring, and the outer ends of the auxiliary support rods are fixedly connected to the inner wall of the discharge barrel or the storage bin.

[0010] A further technical solution is that the feed centering component includes a plurality of feed centering cavities uniformly distributed circumferentially on the feed side of the cladding tube, a support plate is slidingly provided in the feed centering cavity, a number of support balls are installed on the inner side of the support plate, a cylinder 1 is fixed to the outer side of the support plate, the other end of the cylinder 1 is fixedly connected to the outer end of the feed centering cavity, an air pump 1 is also fixed on the discharge barrel, the outlet of the air pump 1 is connected to an air pipe 1, the other end of the air pipe 1 is connected to an annular disk rotatably connected to the end of the cladding tube, an air cavity is opened at the end of the cladding tube corresponding to the annular disk, air pipe 1 is connected to the air cavity, and the cylinder 1 is also connected to the air cavity through air pipe 2.

[0011] According to a further technical solution, a support ring is fixed on the driving component, and the support ring is connected and fixed to the annular disk through multiple support columns distributed circumferentially, and 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 close to the support ball.

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

[0013] A further technical solution is that the discharge cooling assembly includes a cooling chamber opened on the discharge side of the cladding tube, a spiral plate is fixed in the cooling chamber, and a water inlet ring and a water outlet ring are rotatably installed on the outer side of the cladding tube. A plurality of fixed rods are circumferentially distributed and fixed on the outer sides of the water inlet ring and the water outlet ring, one end of the fixed rod is fixedly connected to the end of the support tube, a plurality of water outlet holes are circumferentially distributed on the side wall of the cladding tube corresponding to one end of the cooling chamber, the inner cavity of the water outlet ring is connected to one end of the cooling chamber through the water outlet holes, and a plurality of water inlet holes are circumferentially distributed on the side wall of the cladding tube corresponding to the other end of the cooling chamber, the inner cavity of the water inlet ring is connected to the other end of the cooling chamber through the water inlet holes, and the water inlet ring and the water outlet ring are respectively connected to a cooling water inlet pipe and a cooling water outlet pipe.

[0014] A further technical solution is that the cable insulation layer covering equipment also includes a centering support assembly for centering the cable after the insulation layer is covered, the centering support assembly includes a centering ring coaxial with the covering tube, a side frame 2 is fixed to the outside of the centering ring, the lower end of the side frame 2 is fixed to the equipment base, a plurality of cylinders 2 are fixed circumferentially distributed on the centering ring, a wheel frame is fixed to the telescopic end of the cylinder 2, and a centering wheel with an arc-shaped concave center is rotatably installed on the wheel frame, an air pump 2 is also installed on the equipment base, the outlet of the air pump 2 is connected to the ring-shaped air pipe 3 through the air pipe 4, and the cylinder 2 is also connected to the air pipe 3.

[0015] The present invention provides a cable insulation coating device, which has the following beneficial effects: The storage bin is used to store plastic particles. The cable core to be coated with the insulation layer passes through the coating tube, and the annular heating net, heating rod and pre-heating component are started. As the drive component 2 drives the extrusion shaft to rotate, the spiral blades can squeeze and transport the plastic particles downward. After melting through the annular heating net, heating rod and pre-heating component, the plastic particles are evenly distributed through the annular heating net and enter the extrusion hole. They are then discharged through the extrusion hole and coated on the surface of the cable core. In addition, the drive component 1 can drive the coating tube to rotate according to actual processing needs, so that the molten insulation material discharged from the extrusion hole is evenly coated on the surface of the cable core, thereby improving the molding quality; the feed centering component is used to center the cable core input into the coating tube, and the discharge cooling component is used to water-cool the cable core coated with the insulation layer, thereby improving the accuracy of the insulation coating and allowing the insulation layer to quickly cool and solidify to form a stable insulation structure.

[0016] In summary, the present invention significantly improves the quality and production efficiency of the insulation layer coating by controlling the uniform distribution of the molten plastic and the central support of the cable core, and combining the rotary coating and water cooling shaping technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a cable insulation coating device provided by an embodiment of the present invention; Figure 2 for Figure 1 Another perspective structural diagram; Figure 3 A partial axonometric view of a cable insulation coating device provided in an embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A; Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part B; Figure 6 for Figure 3 Schematic diagram of the enlarged structure of part C; Figure 7 A schematic structural diagram of the centering support assembly portion of the cable insulation layer covering device provided in an embodiment of the present invention.

[0018] In the figure: 1- equipment base, 2- cable core, 3- support ring, 4- support column, 5- air pipe 1, 6- motor 1, 7- motor frame, 8- air pump 1, 9- unloading barrel, 10- storage bin, 11- feeding port, 12- motor 2, 13- side frame 1, 14- gear 1, 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 barrel, 22- gear 2, 23- covering pipe, 24- water outlet ring, 25- extrusion shaft, 26- auxiliary support rod, 27- auxiliary support ring, 28 -Spiral blade, 29-Cooling chamber, 30-Spiral plate, 31-Feed centering chamber, 32-Support ball, 33-Support plate, 34-Cylinder one, 35-Annular heating net, 36-Heating rod, 37-Annular groove, 38-Extrusion hole, 39-Heating column, 40-Discharge pipe, 41-Annular disk, 42-Air cavity, 43-Air pipe two, 44-Water outlet, 45-Water inlet, 46-Centering ring, 47-Air pipe three, 48-Cylinder two, 49-Wheel frame, 50-Centering wheel, 51-Side frame two, 52-Air pipe four, 53-Air pump two, 54-Elastic sealing ring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

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

[0021] like Figure 1-4 As shown, a cable insulation coating device provided by one embodiment of the present invention includes a device base 1 and a side frame 13 fixed thereon, and further includes: The lower material barrel 9 and the support barrel 21 are fixed on the side frame 13 respectively. The upper end of the lower material barrel 9 is fixed with the storage bin 10, and the lower end of the lower material barrel 9 is fixed with the discharge pipe 40. The lower end of the discharge pipe 40 is fixedly connected to the support barrel 21. The cladding tube 23 is rotatably mounted on the inner side of the support tube 21. A driving assembly 1 for driving the cladding tube 23 to rotate is also installed on the discharge tube 9. An annular groove 37 is provided on the outer wall of the cladding tube 23 corresponding to the connection between the discharge tube 40 and the support tube 21. An annular heating network 35 fixedly connected to the support tube 21 is provided in the annular groove 37. A plurality of extrusion holes 38 communicating with the annular groove 37 are also evenly distributed circumferentially on the cladding tube 23. An extrusion shaft 25 is provided in the middle of the inner side of the discharge barrel 9. A spiral blade 28 is fixed to the extrusion shaft 25 inside the discharge barrel 9. The upper end of the extrusion shaft 25 is rotatably connected to the top of the storage bin 10. The top of the storage bin 10 is also equipped with a second drive assembly for driving the extrusion shaft 25 to rotate. A heating rod 36 is further 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 network 35. A preheating assembly is also provided on the lower part of the discharge barrel 9 and the discharge pipe 40. A feed centering component is installed on the feed side of the cladding tube 23, and is used to centrally support the cable core 2 input into the cladding tube 23; A discharge cooling assembly is installed on the discharge side of the coating tube 23, and the discharge cooling assembly is used to water-cool the cable core 2 coated with the insulation layer.

[0022] In an embodiment of the present invention, a storage bin 10 is used to store plastic particles (such as cross-linked polyethylene). The cable core 2 to be coated with an insulation layer passes through the coating tube 23 via a traction and take-up device (not shown, conventional technology can be used). The annular heating network 35, heating rod 36, and pre-heating assembly are activated. As the drive assembly 2 drives the extrusion shaft 25 to rotate, the spiral blade 28 can squeeze and transport the plastic particles downward. After passing through the annular heating network 35, heating rod 36, and pre-heating assembly, the plastic particles are evenly distributed through the annular heating network 35 and enter the extrusion hole 38. They are discharged through the extrusion hole 38 and coated on the surface of the cable core 2. In addition, the drive assembly 1 can drive the coating tube 23 to rotate according to actual processing needs, so that the molten insulation material discharged from the extrusion hole 38 is evenly coated on the surface of the cable core 2, improving the molding quality. The feed centering assembly is used to centrally support the cable core 2 input into the coating tube 23, and the discharge cooling assembly is used to water-cool the cable core 2 coated with the insulation layer, improving the accuracy of the insulation coating and causing the insulation layer to quickly cool and solidify, forming a stable insulation structure.

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

[0024] like Figure 1-4 As shown, as a preferred embodiment of the present invention, the annular heating net 35 and the annular groove 37 are both arc-shaped concave structures in the middle, which increase the heating area of the annular heating net 35. The annular heating net 35 can also allow the molten insulating material to pass through evenly. The molten insulating material can be discharged through the extrusion hole 38 through the annular groove 37, and the rotation of the covering tube 23 will not affect the annular heating net 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 , and the extrusion shaft 25 and the heating rod 36 are rotatably connected to increase 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 portion of the discharge barrel 9 is conical in structure. The heating cone 15 is fixed to the outer side of the lower portion of the discharge barrel 9, and the heating column 39 is fixed to the outer side of the discharge pipe 40. The heating cone 15 and the heating column 39 provide effective preheating, and then the heating rod 36 and the annular heating mesh 35 provide sufficient melting. Preferably, the outer side of the heating cone 15 and the heating column 39 is also provided with a heat insulation layer (not shown) to fully utilize the heat generated by the heating cone 15 and the heating column 39.

[0027] For example, cross-linked polyethylene (XLPE) typically melts at a temperature between 220°C and 260°C. The preheating assembly (heating cone 15 and heating column 39) can be controlled at 150°C to 200°C to prevent premature melting of the plastic pellets, which could cause blockage. The annular heating screen 35 and heating rod 36 are set at 200°C to 300°C to ensure the molten plastic has the fluidity required for extrusion.

[0028] The length of the covering tube 23 is greater than that of the supporting tube 21, and the supporting tube 21 is arranged perpendicular to the discharge tube 40. The driving component 1 includes a motor 16, a motor frame 7, a gear 14 and a gear 22. The feeding side of the covering tube 23 is fixed with a gear 22, the discharge tube 9 is fixed with a motor frame 7, the motor 16 is fixed on the motor frame 7, and the output end of the motor 16 is fixed with a gear 14 meshing with the gear 22.

[0029] The second driving component 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 easily replenished.

[0030] The connection between the discharge barrel 9 and the storage bin 10 is located on the extrusion shaft 25 and an auxiliary support ring 27 is rotatably installed. A plurality of 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 discharge barrel 9 or the storage bin 10, which serves to stably support the extrusion shaft 25, so that the extrusion feeding is stable and reliable.

[0031] Two side frames 13 can be provided, so that the side frames 13 on the front and rear sides of the discharge cylinder 9 and the support cylinder 21 can play a role of stable support, and the side frames 13 can be in an F shape.

[0032] like Figure 1-6As shown, as a preferred embodiment of the present invention, the feed centering component includes a plurality of feed centering cavities 31 uniformly distributed circumferentially on the feed side of the cladding tube 23, a support plate 33 is slidingly provided in the feed 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 to the outer side of the support plate 33, and the other end of the cylinder 34 is fixedly connected to the outer end of the feed centering cavity 31, and an air pump 8 is also fixed on the discharge barrel 9, and the outlet of the air pump 8 is connected to an air pipe 5, and the other end of the air pipe 5 is connected to the annular disk 41 rotatably connected to the end of the cladding tube 23, and an air cavity 42 is opened at the end of the cladding tube 23 corresponding to the annular disk 41, the air pipe 5 is connected to the air cavity 42, and the cylinder 34 is also connected to the air cavity 42 through the air pipe 243. By setting the annular disk 41, the rotation of the covering tube 23 is not affected, and after the air pump 8 is pressurized, the gas can act on the cylinder 1 34 through the air pipe 1 5, the air cavity 42, and the air pipe 2 43, thereby adjusting and controlling the abutment force between the support ball 32 and the cable core 2, thereby achieving a stable and adjustable feeding centering effect.

[0033] Preferably, a support ring 3 is also fixed to the drive assembly 1 (specifically, fixed to the motor 1 6 , but may also be fixed to other components). The support ring 3 is further connected and fixed to the annular disk 41 via a plurality of support columns 4 distributed circumferentially. The support ring 3 and support columns 4 cooperate to further stably support the annular disk 41, thereby improving stability. Furthermore, the air pipe 1 5 is also fixedly connected to the support ring 3 to improve stability.

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

[0035] Preferably, an elastic sealing ring 54 that is in close contact with the surface of the cable core 2 is installed on the inner side of the coating tube 23 between the feed center cavity 31 and the extrusion hole 38. The elastic sealing ring 54 serves as a separator and allows the insulating material to be reliably coated on the surface of the cable core 2.

[0036] The discharging cooling assembly includes a cooling chamber 29 opened on the discharging side of the cladding tube 23, and a spiral plate 30 is fixed in the cooling chamber 29. A water inlet ring 19 and a water outlet ring 24 are rotatably installed on the outer side of the cladding tube 23. A plurality of fixing rods 20 are circumferentially distributed and fixed on the outer sides 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 tube 21. A plurality of water outlet holes 44 are circumferentially distributed on the side wall of the cladding tube 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. A plurality of water inlet holes 45 are circumferentially distributed on the side wall of the cladding tube 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. The water inlet ring 19 and the water outlet ring 24 are also connected to the cooling water inlet pipe 17 and the cooling water outlet pipe 16 respectively. The preparation of cooling water can be carried out by using existing public technologies. Through the arrangement of the water inlet ring 19 and the water outlet ring 24, cooling water can be input and output from the cooling chamber 29 without being affected by the rotation of the cladding tube 23, and the spiral plate 30 arranged in the cooling chamber 29 can make the cooling water flow fully, thereby improving the cooling and shaping effect.

[0037] like Figure 1 and 7 As shown, as a preferred embodiment of the present invention, the cable insulation layer coating equipment also includes a centering support assembly 18 for centering the cable after the insulation layer is coated, and the centering support assembly 18 includes a centering ring 46 coaxial with the coating tube 23, and a side frame 2 51 is fixed to the outer side of the centering ring 46, and the lower end of the side frame 2 51 is fixed to the equipment base 1, and a plurality of cylinders 2 48 are fixed circumferentially on the centering ring 46, and a wheel frame 49 is fixed to the telescopic end of the cylinder 2 48, and a centering wheel 50 with an arc-shaped concave center is rotatably installed on the wheel frame 49, and an air pump 2 53 is also installed on the equipment base 1, and the outlet of the air pump 2 53 is connected to the ring-shaped air pipe 3 47 through the air pipe 4 52, and the cylinder 2 48 is also connected to the air pipe 3 47. By controlling the air pump 2 53, multiple centering rings 46 can be extended and retracted synchronously, and the centering wheel 50 can be used to reliably support the cable, so that the cable can be output in a centered manner after being coated with the insulation layer. Combined with the setting of the feed centering component, the coaxiality of the cable core 2 and the insulation layer can be made higher, thereby improving the processing quality.

[0038] Comparative experiments showed that under the same production conditions (cable core 2 diameter 10mm, polyethylene material), the present invention's coating speed increased by 15% and thickness deviation decreased by 10%. In terms of cooling efficiency, the present invention's design of spiral plate 30 and cooling chamber 29 shortened curing time by 30%.

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

[0040] The preheating assembly consisting of the heating cone 15 , the heating column 39 , the annular heating net 35 and the heating rod 36 is started to preliminarily heat the plastic particles in the discharge barrel 9 .

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

[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 covering tube 23 .

[0043] The driving component 1 drives the coating tube 23 to rotate according to actual needs, so that the molten plastic is evenly coated on the cable core 2, thereby improving the molding quality.

[0044] The feed centering assembly ensures that the cable core 2 input into the coating tube 23 is in the center position, ensuring the uniformity and consistency of the coating. Cylinder 1 34 achieves this goal by adjusting the abutment force between the support ball 32 and the cable core 2.

[0045] The coated cable is then cooled and shaped by a cooling assembly. The spiral plate 30 provided in the cooling chamber 29 allows the cooling water to flow fully, accelerating the cooling process and ensuring that the insulation layer quickly solidifies to form a stable structure.

[0046] The centering support assembly 18 is used to support and center the cable covered with the insulation layer to ensure high coaxiality and improve the quality of the finished product.

[0047] Throughout the entire process, various components work together, from melting, uniform distribution, coating to final cooling and shaping of plastic particles, to achieve efficient and high-quality cable insulation coating.

[0048] The control of each component can be carried out using a PLC controller disclosed in the prior art. The model and circuit connection of each component are not specifically limited and can be flexibly set in actual application.

[0049] The circuits, electronic components and modules involved are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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 above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A cable insulation coating device, comprising a device base (1) and a side frame (13) fixed thereon, characterized in that: Also includes: A discharge barrel (9) and a support barrel (21), wherein the discharge barrel (9) and the support barrel (21) are fixed to the side frame (13), respectively, a storage bin (10) is fixed to the upper end of the discharge barrel (9), a discharge pipe (40) is fixed to the lower end of the discharge barrel (9), and the lower end of the discharge pipe (40) is fixedly connected to the support barrel (21); A cladding tube (23), the cladding tube (23) is rotatably mounted on the inner side of the support tube (21), and a driving assembly 1 for driving the cladding tube (23) to rotate is also mounted on the discharge tube (9); an annular groove (37) is provided on the outer wall of the cladding tube (23) corresponding to the connection between the discharge tube (40) and the support tube (21), an annular heating net (35) fixedly connected to the support tube (21) is provided in the annular groove (37), and a plurality of extrusion holes (38) in communication with the annular groove (37) are evenly distributed circumferentially on the cladding tube (23); An extrusion shaft (25) is provided at the middle portion of the inner side of the discharge barrel (9), a spiral blade (28) is fixed on the extrusion shaft (25) inside the discharge barrel (9), the upper end of the extrusion shaft (25) is rotatably connected to the top of the storage bin (10), and a driving component 2 for driving the extrusion shaft (25) to rotate is also installed on the top of the storage bin (10); a heating rod (36) is also provided at the lower end of the extrusion shaft (25), and the lower end of the heating rod (36) is fixedly connected to the annular heating net (35); a preheating component is also provided on the lower portion of the discharge barrel (9) and the discharge pipe (40); A feed centering component is installed on the feed side of the cladding tube (23), and the feed centering component is used to centrally support the cable core (2) input into the cladding tube (23); A discharge cooling assembly is installed on the discharge side of the coating tube (23), and the discharge cooling assembly is used to perform water cooling and shaping on the cable core (2) coated with the insulation layer.

2. The cable insulation coating device according to claim 1, characterized in that: The annular heating net (35) and the annular groove (37) both have a central arc-shaped concave structure; The heating rod (36), the discharge pipe (40) and the extrusion shaft (25) are all coaxially arranged, and the upper end of the heating rod (36) extends into the inner side of the extrusion shaft (25), and the extrusion shaft (25) and the heating rod (36) are rotatably connected.

3. The cable insulation coating device according to claim 2, characterized in that: The preheating assembly includes a heating cone (15) and a heating column (39); The lower portion of the discharge barrel (9) is in a conical structure, a heating cone (15) is fixedly mounted on the outer side of the lower portion of the discharge barrel (9), and a heating column (39) is fixedly mounted on the outer side of the discharge pipe (40).

4. The cable insulation coating device according to claim 1, characterized in that: The length of the cladding tube (23) is greater than the length of the support tube (21), and the support tube (21) is arranged perpendicular to the discharge tube (40); The driving assembly 1 includes a motor 1 (6), a motor frame (7), a gear 1 (14) and a gear 2 (22); the feeding side of the cladding tube (23) is fixed with the gear 2 (22); the motor frame (7) is fixed on the discharge barrel (9); the motor 1 (6) is fixed on the motor frame (7); the output end of the motor 1 (6) is fixed with the gear 1 (14) meshing with the gear 2 (22); The second driving component comprises a second motor (12) fixed to the top of the storage bin (10) and connected to the extrusion shaft (25).

5. The cable insulation coating device according to claim 1, characterized in that: The connection between the discharge barrel (9) and the storage bin (10) is located on an extrusion shaft (25) and is rotatably mounted with an auxiliary support ring (27). A plurality of auxiliary support rods (26) are evenly distributed and fixed on the outer side of the auxiliary support ring (27). The outer ends of the auxiliary support rods (26) are fixedly connected to the inner wall of the discharge barrel (9) or the storage bin (10).

6. The cable insulation coating device according to any one of claims 1 to 5, characterized in that: The feed centering assembly includes a plurality of feed centering cavities (31) uniformly distributed circumferentially on the feed side of the cladding tube (23), a support plate (33) is slidably provided in the feed centering cavity (31), a plurality of support balls (32) are installed on the inner side of the support plate (33), a cylinder 1 (34) is fixed on the outer side of the support plate (33), and the other end of the cylinder 1 (34) is fixedly connected to the outer end of the feed centering cavity (31); An air pump (8) is also fixed on the discharge barrel (9), and the outlet of the air pump (8) is connected to an air pipe (5). The other end of the air pipe (5) is connected to an annular disk (41) that is rotatably connected to the end of the covering tube (23). An air cavity (42) is provided at the end of the covering tube (23) corresponding to the annular disk (41). The air pipe (5) is connected to the air cavity (42), and the cylinder (34) is also connected to the air cavity (42) through the air pipe (43).

7. The cable insulation coating device according to claim 6, characterized in that: A support ring (3) is also fixed on the driving component 1, and the support ring (3) is also connected and fixed to the annular disk (41) through a plurality of support columns (4) distributed in a circumferential direction, and the air pipe 1 (5) is also fixedly connected to the support ring (3); An auxiliary heating layer is also provided on one side of the support plate (33) close to the support ball (32).

8. The cable insulation coating device according to claim 6, characterized in that: An elastic sealing ring (54) is installed on the inner side of the coating tube (23) between the feed center cavity (31) and the extrusion hole (38), and is in close contact with the surface of the cable core (2).

9. The cable insulation coating device according to any one of claims 1 to 5, characterized in that: The discharge cooling assembly comprises a cooling cavity (29) opened on the discharge side of the cladding tube (23), and a spiral plate (30) is fixed in the cooling cavity (29); A water inlet ring (19) and a water outlet ring (24) are rotatably mounted on the outer side of the cladding tube (23). A plurality of fixing rods (20) are circumferentially distributed and fixed to the outer sides 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 tube (21). A plurality of water outlet holes (44) are circumferentially distributed on the side wall of the cladding tube (23) corresponding to one end of the cooling cavity (29), and the inner cavity of the water outlet ring (24) is connected to one end of the cooling cavity (29) through the water outlet holes (44); A plurality of water inlet holes (45) are circumferentially distributed on the side wall of the cladding tube (23) corresponding to the other end of the cooling cavity (29), and the inner cavity of the water inlet ring (19) is connected to the other end of the cooling cavity (29) through the water inlet holes (45); The water inlet ring (19) and the water outlet ring (24) are also connected to a cooling water inlet pipe (17) and a cooling water outlet pipe (16), respectively.

10. The cable insulation coating device according to claim 6, characterized in that: The cable insulation layer coating device also includes a centering support component (18) for centering and supporting the cable after the insulation layer is coated; The centering support assembly (18) includes a centering ring (46) coaxial with the cladding tube (23), a side frame 2 (51) is fixed to the outside of the centering ring (46), and the lower end of the side frame 2 (51) is fixed to the equipment base (1); A plurality of cylinders (48) are fixed circumferentially distributed on the centering ring (46), a wheel frame (49) is fixed to the telescopic end of the cylinder (48), and a centering wheel (50) with an arc-shaped concave center portion is rotatably mounted on the wheel frame (49); An air pump 2 (53) is also installed on the equipment base (1). The outlet of the air pump 2 (53) is connected to the ring-shaped air pipe 3 (47) through the air pipe 4 (52). The air cylinder 2 (48) is also connected to the air pipe 3 (47).

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