A cold-resistant and freeze-proof high-voltage cable and its manufacturing process

Abstract

This invention discloses a cold-resistant and freeze-proof high-voltage cable and its manufacturing process, relating to the field of cables. A sandwich structure is provided between the high-voltage cable sheath and the high-voltage cable core, and a cold-resistant and freeze-proof component is installed within the sandwich structure. The cold-resistant and freeze-proof component includes a first cold-resistant and freeze-proof strip and a second cold-resistant and freeze-proof strip, both of which have a trapezoidal block structure. One end of the first and second cold-resistant and freeze-proof strips is bonded to the outer ring of the high-voltage cable core, and the other end is bonded to the inner ring of the high-voltage cable sheath. The sandwich structure between the high-voltage cable sheath and the high-voltage cable core, with the cold-resistant and freeze-proof component installed within it, plays a crucial role in cold-resistant and freeze-proof performance, significantly improving the cold-resistant and freeze-proof performance of existing high-voltage cables. Simultaneously, the design of the cold-resistant and freeze-proof component enhances the bending resistance of the high-voltage cable.

Description

Technical Field

[0001] This invention relates to the field of cables, and in particular to a cold-resistant and freeze-proof high-voltage cable and its manufacturing process. Background Technology

[0002] In low-temperature environments, cable performance is significantly affected, primarily through increased conductor resistance, expanded bending radius, reduced insulation performance, and embrittlement of the outer insulation material. Firstly, the increased conductor resistance due to lower temperatures necessitates prioritizing conductor materials with lower resistivity when selecting cables to ensure conductivity at low temperatures. Secondly, low temperatures cause cable materials to harden and become brittle, increasing the bending radius and negatively impacting the cable's bending performance and load-bearing capacity.

[0003] Therefore, it is necessary to propose a cold-resistant and freeze-proof high-voltage cable and its manufacturing process to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a cold-resistant and freeze-proof high-voltage cable and its manufacturing process, thereby improving the cold-resistant and freeze-proof performance of high-voltage cables.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cold-resistant and anti-freezing high-voltage cable, comprising a high-voltage cable sheath and a high-voltage cable core, wherein the high-voltage cable core is disposed inside the high-voltage cable sheath, and a sandwich layer is provided between the high-voltage cable sheath and the high-voltage cable core, wherein a cold-resistant and anti-freezing component is disposed in the sandwich layer;

[0006] The cold-resistant and antifreeze component includes a first cold-resistant and antifreeze strip and a second cold-resistant and antifreeze strip. Both the first cold-resistant and antifreeze strip and the second cold-resistant and antifreeze strip have a trapezoidal block structure. One end of the first cold-resistant and antifreeze strip and the second cold-resistant and antifreeze strip are bonded to the outer ring of the high-voltage cable core, and the other end of the first cold-resistant and antifreeze strip and the second cold-resistant and antifreeze strip are bonded to the inner ring of the high-voltage cable sheath.

[0007] Multiple first and second cold-resistant and antifreeze strips are provided, and the multiple first cold-resistant and antifreeze strips and multiple second cold-resistant and antifreeze strips are distributed in a circular array in the interlayer;

[0008] The tail end of the first cold-resistant and antifreeze strip is located on the side of the head end of the second cold-resistant and antifreeze strip;

[0009] Multiple first cold-resistant and anti-freezing strips distributed in the same section constitute a first cold-resistant and anti-freezing component; multiple second cold-resistant and anti-freezing strips distributed in the same section constitute a second cold-resistant and anti-freezing component;

[0010] The first and second cold-resistant and antifreeze components are each provided in multiple sets, and the multiple sets of the first cold-resistant and antifreeze components and the multiple sets of the second cold-resistant and antifreeze components are distributed at equal distances along the length of the high-voltage cable sheath.

[0011] Preferably, both the first and second antifreeze strips are provided with air holes, which simultaneously penetrate the end faces of the first and second antifreeze strips. Multiple air holes are provided, and the multiple air holes are distributed at equal intervals.

[0012] Preferably, a first gap is formed between the sides of the first and second antifreeze strips that are close to each other.

[0013] Preferably, a second gap is formed between the first and second cold-resistant and antifreeze components that are adjacent to each other.

[0014] Preferably, the cold-resistant and antifreeze component has a bending-resistant sheet inside, the bending-resistant sheet having an arc-shaped sheet structure, with the arc-shaped concave surface facing the outer ring of the high-voltage cable core.

[0015] Preferably, both ends of the bend-resistant sheet are provided with vertical sheets.

[0016] Preferably, the flexurally resistant sheet is made of any one of aluminum alloy, copper, or aluminum.

[0017] Preferably, the cold-resistant and antifreeze component is made of any one of the following materials: silicone rubber, nitrile compound, and polyurethane.

[0018] Preferably, the outer sheath of the high-voltage cable includes an outer insulation layer, a cold-resistant layer, and a fire-resistant layer arranged sequentially from the outside to the inside.

[0019] This invention also discloses a manufacturing process for a cold-resistant and freeze-proof high-voltage cable, comprising:

[0020] Step 1: Extrusion installation. The high-voltage cable core is extruded using an extrusion device. During the extrusion process, the cold-resistant and antifreeze parts are attached to the outer ring of the high-voltage cable core using a feeding mechanism installed at the outlet of the extrusion device. Then, an adhesive layer is applied to the outer ring of the cold-resistant and antifreeze parts using the extrusion device.

[0021] Step 2: Wrapping. Use a wrapping machine to spirally wrap the fireproof layer along the axial direction of the high-voltage cable core, so that the fireproof layer is wrapped around the outer ring of the cold-resistant and anti-freezing component.

[0022] Then, the cold-resistant layer is spirally wound along the axial direction of the high-voltage cable core using a wrapping machine, so that the cold-resistant layer is wrapped around the outer ring of the fireproof layer.

[0023] The overlap rate of the wrapping is between 50% and 70%.

[0024] Step 3: Wrapping. The high-voltage cable core produced in step 2 is passed through the extrusion machine. The extruder wraps the insulation material around the outer ring of the cold-resistant layer and forms the outer insulation layer. After cooling, the preparation of the cold-resistant and freeze-proof high-voltage cable is completed.

[0025] The feeding mechanism includes an upper substrate and a lower substrate, both of which are disposed on one side of the outlet of the extrusion equipment. The upper substrate is located above the lower substrate, and the upper substrate and the lower substrate are detachably installed at the outlet of the extrusion equipment.

[0026] An elastic metal plate is fixedly mounted on one end of the upper substrate. The elastic metal plate is elastic and has a circular structure. One end of the elastic metal plate is open. A second electric push rod is installed on the inner wall of the elastic metal plate. Multiple second electric push rods are provided and are evenly distributed. A suction plate is fixedly mounted on the end of each second electric push rod. The suction plate is used to attract and fix the cold-resistant and antifreeze parts. A traction rope is connected to the end of the elastic metal plate away from the upper substrate. The traction rope is attached to the outer ring of the elastic metal plate. A winding machine is installed on the end of the upper substrate away from the elastic metal plate. The winding machine is used to wind the traction rope. A side plate is fixedly mounted on the side of the lower substrate away from the elastic metal plate. A first electric push rod is fixedly mounted on the side plate. The telescopic end of the first electric push rod is fixedly connected to the end of the upper substrate away from the elastic metal plate. A material box is fixedly mounted on the upper surface of the lower substrate. Multiple material boxes are provided and are evenly distributed. The material boxes are used to store the cold-resistant and antifreeze parts.

[0027] The technical effects and advantages of this invention are as follows:

[0028] The present invention provides a sandwich layer between the high-voltage cable sheath and the high-voltage cable core, and an anti-freezing component is provided in the sandwich layer. The anti-freezing component plays a key role in anti-freezing and greatly improves the anti-freezing performance of existing high-voltage cables. At the same time, the design of the anti-freezing component improves the bending resistance of the high-voltage cable.

[0029] Heat can be concentrated in the second gap and remain there for a long time, which provides good insulation for the high-voltage cable. Heat is not easily lost to the outside, and at the same time, the impact of external cold air on the high-voltage cable is reduced.

[0030] The pores serve to connect the second gaps at both ends of the first or second antifreeze strip, allowing adjacent second gaps to be interconnected. In this way, when the temperature in some areas outside the high-voltage cable core is too high, the pressure will increase due to heat accumulation. The air pressure in the higher temperature area will push this heat to the adjacent area, thereby avoiding the problem of excessive temperature in some areas caused by heat accumulation.

[0031] The bend-resistant sheet increases the strength of the high-voltage cable, making it less prone to bending. The bend-resistant sheet also has excellent elastic recovery, allowing the high-voltage cable to quickly return to its original position when it loses bending force. Simultaneously, heat accumulates in the cold-resistant and anti-freeze component area, especially absorbed into the bend-resistant sheet in the middle of the component, providing insulation and preventing heat loss to the outside, resulting in better cold-resistant and anti-freeze performance.

[0032] The advantage of the method for manufacturing cold-resistant and anti-freezing high-voltage cables in this invention is that it enables the batch installation of cold-resistant and anti-freezing components in the interlayer between the high-voltage cable core and the high-voltage cable sheath. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the cold-resistant and freeze-proof high-voltage cable structure of the present invention.

[0034] Figure 2 This is a schematic diagram of the cold-resistant and freeze-proof high-voltage cable end face structure of the present invention.

[0035] Figure 3 This is a radial cross-sectional view of the cold-resistant and freeze-proof high-voltage cable in Embodiment 1 of the present invention.

[0036] Figure 4 This is a radial cross-sectional view of the cold-resistant and freeze-proof high-voltage cable in Embodiment 2 of the present invention.

[0037] Figure 5 This is a schematic diagram of the cold-resistant and antifreeze component structure of the present invention.

[0038] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the cold-resistant and antifreeze component structure.

[0039] Figure 7 This is a schematic diagram of the pore structure of the present invention.

[0040] Figure 8 This is a schematic diagram of the bend-resistant sheet structure of the present invention.

[0041] Figure 9 This is a schematic diagram of the feeding mechanism of the present invention.

[0042] Figure 10 This is a schematic diagram of the structure of the feeding mechanism of the present invention during the first step of resetting.

[0043] Figure 11 This is a schematic diagram of the structure of the feeding mechanism during the second step of resetting according to the present invention.

[0044] In the diagram: 1. High-voltage cable outer sheath; 101. Outer insulation layer; 102. Cold-resistant layer; 103. Fireproof layer; 2. High-voltage cable core; 3. Cold-resistant and anti-freezing components; 31. First cold-resistant and anti-freezing strip; 32. Second cold-resistant and anti-freezing strip; 301. Air hole; 302. First gap; 303. Second gap; 4. Bending-resistant sheet; 401. Vertical sheet; 5. Upper substrate; 6. Lower substrate; 7. Side plate; 8. First electric push rod; 9. Winding machine; 10. Traction rope; 11. Elastic metal plate; 12. Second electric push rod; 13. Suction plate; 14. Material box. Detailed Implementation

[0045] This invention provides, for example Figures 1-11 This paper presents a cold-resistant and freeze-proof high-voltage cable and its manufacturing process.

[0046] In Example 1, refer to Appendix Figure 1 As shown, the cold-resistant and freeze-proof high-voltage cable includes a high-voltage cable sheath 1 and a high-voltage cable core 2, with the high-voltage cable core 2 located inside the high-voltage cable sheath 1.

[0047] Reference Appendix Figure 2 As shown, the outer sheath 1 of the high-voltage cable includes an outer insulation layer 101, a cold-resistant layer 102, and a fireproof layer 103 arranged sequentially from the outside to the inside.

[0048] The outer insulation layer 101 is usually made of materials such as polyethylene and polyvinyl chloride. After heating and extrusion processes, the insulation material is wrapped on the cold-resistant layer 102 to play an insulating role.

[0049] The cold-resistant layer 102 is typically made of one or more of the following materials: polystyrene foam, rubber, thermoplastic elastomer, polyvinyl chloride, silicone rubber, nitrile butadiene compound, and polyurethane. It mainly provides good thermal insulation and plays a key role in cold resistance and frost protection. These materials can usually maintain flexibility at temperatures of -40°C or even lower, preventing high-voltage cables from becoming brittle.

[0050] Among them, the fireproof layer 103 is usually made of wrapping tape coated with fireproof paint. The fireproof paint can decompose into carbon dioxide and water vapor in the event of a fire, forming a heat insulation layer, preventing heat transfer, and protecting the high-voltage cable.

[0051] refer to Figure 2 As shown, a sandwich layer is provided between the high-voltage cable sheath 1 and the high-voltage cable core 2 of the present invention, and a cold-resistant and anti-freezing component 3 is provided in the sandwich layer. The cold-resistant and anti-freezing component 3 plays a key role in cold resistance and anti-freezing, and greatly improves the cold resistance and anti-freezing performance of existing high-voltage cables.

[0052] For details, please refer to Figure 3 , Figure 5 and Figure 6The cold-resistant and anti-freezing component 3 includes a first cold-resistant and anti-freezing strip 31 and a second cold-resistant and anti-freezing strip 32. Both the first cold-resistant and anti-freezing strip 31 and the second cold-resistant and anti-freezing strip 32 have a trapezoidal block structure. One end of the first cold-resistant and anti-freezing strip 31 and the second cold-resistant and anti-freezing strip 32 is bonded to the outer ring of the high-voltage cable core 2, and the other end of the first cold-resistant and anti-freezing strip 31 and the second cold-resistant and anti-freezing strip 32 is bonded to the inner ring of the high-voltage cable sheath 1. Multiple first cold-resistant and anti-freezing strips 31 and multiple second cold-resistant and anti-freezing strips 32 are provided, and multiple first cold-resistant and anti-freezing strips 31 and multiple second cold-resistant and anti-freezing strips 32 are distributed in a circular array in the interlayer. The tail end of the first cold-resistant and anti-freezing strip 31 is located on the side of the head end of the second cold-resistant and anti-freezing strip 32. Multiple first cold-resistant and anti-freezing strips 31 distributed in the same section constitute the first The cold-resistant and anti-freezing components are composed of multiple second cold-resistant and anti-freezing strips 32 distributed in the same section. Multiple sets of both the first and second cold-resistant and anti-freezing components are provided, and the multiple sets of the first and second cold-resistant and anti-freezing components are distributed at equal distances along the length of the high-voltage cable sheath 1. Since a second gap 303 is formed between the first and second cold-resistant and anti-freezing components that are adjacent to each other, the interlayer is divided into many chambers of different sizes. When the high-voltage cable is energized, it generates heat. This heat can be concentrated in the second gap 303 and remain for a long time, which has a good heat preservation effect on the high-voltage cable. The heat is not easy to lose out quickly. At the same time, it reduces the impact of external cold air on the high-voltage cable.

[0053] refer to Figure 2 , Figures 6 to 7 As shown, both the first antifreeze strip 31 and the second antifreeze strip 32 are provided with air holes 301. The air holes 301 penetrate the end faces of the first and second antifreeze strips 31 and 32. There are multiple air holes 301, which are distributed at equal intervals. The air holes 301 serve to connect the second gaps 303 at the beginning and end of the first and second antifreeze strips 31 and 32, so that adjacent second gaps 303 can be interconnected. In this way, when the temperature in some areas outside the high-voltage cable core 2 is too high, the pressure will increase due to the accumulation of heat. The air pressure in the higher temperature area will push this part of the heat to the adjacent area, thereby avoiding the problem of excessive temperature in some areas caused by heat accumulation.

[0054] Furthermore, the cold-resistant and antifreeze component 3 provided in this invention also increases the bending resistance of the high-voltage cable. Specifically, when the high-voltage cable is bent, the first cold-resistant and antifreeze strip 31 or the second cold-resistant and antifreeze strip 32 will undergo corresponding elastic deformation. When the first cold-resistant and antifreeze strip 31 and the second cold-resistant and antifreeze strip 32 undergo elastic deformation, they will completely fill the radial section of the bent area of ​​the high-voltage cable, and the air hole 301 will also be flattened, so that the adjacent second gap 303 will no longer be connected. In this way, the excess gas will quickly pressurize into the adjacent second gap 303, making it difficult for the bent area to continue to deform, thus achieving good bending resistance.

[0055] refer to Figure 8 As shown in the figure, in this invention, a bending-resistant sheet 4 is provided inside the cold-resistant and antifreeze component 3. The bending-resistant sheet 4 has an arc-shaped sheet structure, with the arc-shaped concave surface facing the outer ring of the high-voltage cable core 2. The setting of the bending-resistant sheet 4 increases the strength of the high-voltage cable, making the high-voltage cable less prone to bending. Moreover, the bending-resistant sheet 4 has good elastic recovery ability, and can quickly reset when the high-voltage cable loses bending force.

[0056] The bending-resistant sheet 4 is made of any one of aluminum alloy, copper, or aluminum. In this invention, the bending-resistant sheet 4 is made of aluminum alloy, which has good heat absorption and a certain degree of elastic deformation ability. When the high-voltage cable core 2 generates heat, the heat accumulates in the area of ​​the cold-resistant and antifreeze component 3, especially being absorbed into the bending-resistant sheet 4 in the middle of the cold-resistant and antifreeze component 3, which plays a role in heat preservation, making it difficult for heat to be lost to the outside, and has better cold-resistant and antifreeze performance.

[0057] Considering that the two ends of the bending-resistant sheet 4 are prone to cracking when bent, the first anti-freezing strip 31 or the second anti-freezing strip 32 is provided with vertical sheets 401 at both ends of the bending-resistant sheet 4 in actual use. The vertical sheets 401 have a large contact surface with the first anti-freezing strip 31 or the second anti-freezing strip 32. In this way, when the bending-resistant sheet 4 is elastically deformed or reset, the first anti-freezing strip 31 or the second anti-freezing strip 32 is less likely to crack due to the small contact surface at the ends.

[0058] It should be noted that the cold-resistant and antifreeze component 3 is made of any one of the following materials: silicone rubber, nitrile compound, and polyurethane. In this invention, the cold-resistant and antifreeze component 3 is made of silicone rubber, which has good thermal insulation properties and is easy to elastically deform.

[0059] This invention also discloses a manufacturing process for a cold-resistant and freeze-proof high-voltage cable, specifically including:

[0060] Step 1: Extrusion installation. The high-voltage cable core 2 is extruded using the first extruder. During the extrusion process, the cold-resistant and antifreeze part 3 is attached to the outer ring of the high-voltage cable core 2 using the feeding mechanism installed at the outlet of the first extruder. Then, the first extruder is used to apply an adhesive layer to the outer ring of the cold-resistant and antifreeze part 3.

[0061] Step 2: Wrapping. Using a wrapping machine, the fireproof layer 103 is spirally wound along the axial direction of the high-voltage cable core 2, so that the fireproof layer 103 is wrapped around the outer ring of the cold-resistant and anti-freezing component 3.

[0062] Then, the cold-resistant layer 102 is spirally wound along the axial direction of the high-voltage cable core 2 using a wrapping machine, so that the cold-resistant layer 102 is wrapped around the outer ring of the fireproof layer 103.

[0063] The overlap rate of the wrapping is between 50% and 70%.

[0064] Step 3: Wrapping. The high-voltage cable core 2 produced in Step 2 is passed through the second extruder. The second extruder wraps the insulation material around the outer ring of the cold-resistant layer 102 and forms the outer insulation layer 101. After cooling, the preparation of the cold-resistant and freeze-proof high-voltage cable is completed.

[0065] The feeding mechanism includes an upper substrate 5 and a lower substrate 6. Both the upper substrate 5 and the lower substrate 6 are located on one side of the outlet of the first extruder. The upper substrate 5 is located above the lower substrate 6. The upper substrate 5 and the lower substrate 6 are detachably installed at the outlet of the first extruder.

[0066] An elastic metal plate 11 is fixedly disposed at one end of the upper substrate 5. The elastic metal plate 11 is elastic and has a circular structure. One end of the elastic metal plate 11 is open. A second electric push rod 12 is installed on the inner wall of the elastic metal plate 11. Multiple second electric push rods 12 are provided and are evenly distributed. A suction plate 13 is fixedly disposed at the end of the second electric push rod 12. The suction plate 13 is used to adsorb and fix the cold-resistant and antifreeze component 3. A traction rope 10 is connected to the end of the elastic metal plate 11 away from the upper substrate 5. A winding machine 9 is installed on the outer ring of the elastic metal plate 11, and on the end of the upper substrate 5 away from the elastic metal plate 11. The winding machine 9 is used to wind the traction rope 10. A side plate 7 is fixedly provided on the side of the lower substrate 6 away from the elastic metal plate 11. A first electric push rod 8 is fixedly installed on the side plate 7. The telescopic end of the first electric push rod 8 is fixedly connected to the end of the upper substrate 5 away from the elastic metal plate 11. A material box 14 is fixedly provided on the upper surface of the lower substrate 6. Multiple material boxes 14 are provided and are distributed at equal distances. The material boxes 14 are used to store the cold-resistant and antifreeze parts 3.

[0067] It should be noted that the first extruder and the second extruder are collectively referred to as extrusion equipment; while extruders and wrapping machines are commonly used cable processing equipment in existing technology, and will not be elaborated here.

[0068] refer to Figures 8 to 11 As shown, the advantage of the method for manufacturing cold-resistant and anti-freezing high-voltage cables in this invention is that it can install cold-resistant and anti-freezing components 3 in batches in the interlayer between the high-voltage cable core 2 and the high-voltage cable sheath 1. In the prior art, cold-resistant and anti-freezing components 3 can also be pasted manually, which is not limited here, but it is not as efficient as using a feeding mechanism to install cold-resistant and anti-freezing components 3.

[0069] Specifically, multiple first antifreeze strips 31 or second antifreeze strips 32 are placed in corresponding material boxes 14. When the high-voltage cable core 2 is extruded from the first extruder, the winding machine 9 winds up the traction rope 10, causing the elastic metal plate 11 to be unfolded and laid flat on the lower surface of the upper substrate 5. At this time, the first electric push rod 8 pulls the upper substrate 5, so that multiple suction plates 13 correspond one-to-one with multiple material boxes 14. Then, the second electric push rod 12 is activated to push the suction plates 13 down, which can place the corresponding first antifreeze strip 31 or second antifreeze strip 32 into the material box 14. Strip 32 is pasted onto the suction plate 13, then the second electric push rod 12 is reset, and the winding machine 9 is used to unwind the traction rope 10. The elastic metal plate 11 is reset into a ring shape using the elastic reset function. At this time, the first anti-freezing strip 31 or the second anti-freezing strip 32 adsorbed on the suction plate 13 is exactly aligned with the corresponding position on the outer ring of the high-voltage cable core 2. The second electric push rod 12 is activated, and the suction plate 13 is used to push and stick the first anti-freezing strip 31 or the second anti-freezing strip 32 onto the corresponding high-voltage cable core 2. It is simple, convenient, and can be mass-produced.

[0070] It should be noted that the suction plate 13 can use negative pressure adsorption or other methods, which are not limited here. Adhesive should be applied manually to both ends of the antifreeze part 3 to facilitate the bonding of the antifreeze part 3 to the high-voltage cable core 2 or the high-voltage cable sheath 1. The winding machine 9 is a common winding machine, which will not be described in detail here.

[0071] In Example 2, reference Figure 4 As shown, a first gap 302 is formed between the sides of the first anti-freezing strip 31 and the second anti-freezing strip 32 that are close to each other in this invention; the heat in the adjacent second gaps 303 can be connected, so as to complement each other and make the external temperature of the high-voltage cable core 2 constant, and it is not easy for some areas to have excessively high or low temperatures. The specific size of the first gap 302 can be set according to actual needs.

Claims

1. A cold-resistant and anti-freezing high-voltage cable comprising a high-voltage cable sheath (1) and a high-voltage cable core (2) arranged inside the high-voltage cable sheath (1), characterized in that: A high-voltage cable outer skin (1) and a high-voltage cable core (2) are provided with a sandwich layer, and an anti-cold and anti-freezing member (3) is arranged in the sandwich layer; The anti-cold and anti-freezing member (3) comprises a first anti-cold and anti-freezing strip (31) and a second anti-cold and anti-freezing strip (32), and the first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) are arranged in gaps, the first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) are both in trapezoidal block structure, one end of the first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) is adhered to the outer circle of the high-voltage cable core (2), and the other end of the first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) is adhered to the inner circle of the high-voltage cable outer skin (1); The first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) are both provided with a plurality of first anti-cold and anti-freezing strips (31) and a plurality of second anti-cold and anti-freezing strips (32), and the plurality of first anti-cold and anti-freezing strips (31) and the plurality of second anti-cold and anti-freezing strips (32) are arranged in a circular array in the sandwich layer; The tail end of the first anti-cold and anti-freezing strip (31) is located on the side of the head end of the second anti-cold and anti-freezing strip (32); The plurality of first anti-cold and anti-freezing strips (31) arranged in the same section form a first anti-cold and anti-freezing assembly, and the plurality of second anti-cold and anti-freezing strips (32) arranged in the same section form a second anti-cold and anti-freezing assembly; The first anti-cold and anti-freezing assembly and the second anti-cold and anti-freezing assembly are both provided with a plurality of groups, and the plurality of groups of the first anti-cold and anti-freezing assembly and the plurality of groups of the second anti-cold and anti-freezing assembly are arranged at equal distances along the length direction of the high-voltage cable outer skin (1).

2. A cold-resistant and anti-freezing high-voltage cable according to claim 1, characterized in that: The first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) are both provided with air holes (301), the air holes (301) penetrate the end faces of the first anti-cold and anti-freezing strip (31) or the second anti-cold and anti-freezing strip (32) at the head end and the tail end, the air holes (301) are provided with a plurality of air holes (301), and the plurality of air holes (301) are arranged at equal distances.

3. A cold-resistant and anti-freezing high-voltage cable according to claim 1, characterized in that: The first anti-cold and anti-freezing strip (31) and the second anti-cold and anti-freezing strip (32) form a first gap (302) between the mutually close side faces.

4. The cold-resistant and freeze-proof high-voltage cable according to claim 1, characterized in that: The first anti-cold and anti-freezing assembly and the second anti-cold and anti-freezing assembly form a second gap (303) between the first anti-cold and anti-freezing assembly and the second anti-cold and anti-freezing assembly arranged in sequence.

5. The cold-resistant and freeze-proof high-voltage cable according to claim 1, characterized in that: The anti-cold and anti-freezing member (3) is provided with a bending-resistant sheet (4) inside, the bending-resistant sheet (4) is in arc-shaped sheet structure, and the arc-shaped concave surface faces the outer circle of the high-voltage cable core (2).

6. A cold-resistant and anti-freezing high-voltage cable according to claim 5, characterized in that: The bending-resistant sheet (4) is provided with a vertical sheet (401) at both ends.

7. A cold-resistant and anti-freezing high-voltage cable according to claim 5, characterized in that: The bending-resistant sheet (4) is made of any one of aluminum alloy, copper and aluminum.

8. A cold-resistant and anti-freezing high-voltage cable according to claim 1, characterized in that: The anti-cold and anti-freezing member (3) is made of any one of silicone rubber, nitrile rubber compound and polyurethane.

9. A cold-resistant and anti-freezing high-voltage cable according to claim 1, characterized in that: The high-voltage cable outer skin (1) comprises, from outside to inside, an outer insulation layer (101), an anti-cold layer (102) and a fireproof layer (103).

10. Process for the production of a cold-resistant, freeze-proof high-voltage cable according to any one of claims 1 to 9, characterized in that It comprises: First step: extrusion installation, extruding the high-voltage cable core (2) by using the extrusion equipment, and adhering the anti-cold and anti-freezing member (3) to the outer circle of the high-voltage cable core (2) by using the feeding mechanism arranged at the outlet of the extrusion equipment during the extrusion process of the high-voltage cable core (2), and then brushing the adhesive layer on the outer circle of the anti-cold and anti-freezing member (3) by using the extrusion equipment; Second step: winding, using the winding machine to spiral the fireproof layer (103) along the axial direction of the high-voltage cable core (2), so that the fireproof layer (103) is wound at the outer ring of the cold-proof and anti-freezing part (3); Then use the winding machine to spiral the cold-proof layer (102) along the axial direction of the high-voltage cable core (2), so that the cold-proof layer (102) is wound at the outer ring of the fireproof layer (103); The overlap rate of winding is between 50% and 70%; Third step: coating, the high-voltage cable core (2) produced after the second step passes through the extrusion equipment of the extruder, and the extruder coats the insulation material at the outer ring of the cold-proof layer (102) and forms the outer insulation layer (101), and waits for cooling to complete the preparation of the cold-proof and anti-freezing high-voltage cable; The upper base plate (5) and the lower base plate (6) are arranged on one side of the outlet of the extrusion equipment, and the upper base plate (5) is located above the lower base plate (6). One end of the upper base plate (5) is fixedly provided with an elastic metal plate (11), the elastic metal plate (11) has elasticity, and the elastic metal plate (11) is in a circular ring structure, one end of the elastic metal plate (11) is open, a second electric push rod (12) is installed on the inner wall of the elastic metal plate (11), the second electric push rod (12) is provided with a plurality of second electric push rods (12), the plurality of second electric push rods (12) are distributed at equal distances, a suction plate (13) is fixedly installed at the end of the second electric push rod (12), the suction plate (13) is used for adsorbing and fixing the cold-proof and anti-freezing part (3), a traction rope (10) is connected to the end of the elastic metal plate (11) away from the upper base plate (5), the traction rope (10) is attached to the outer ring of the elastic metal plate (11), and a winding machine (9) is installed at the end of the upper base plate (5) away from the elastic metal plate (11), the winding machine (9) is used for winding the traction rope (10), a side plate (7) is fixedly arranged on the side of the lower base plate (6) away from the elastic metal plate (11), a first electric push rod (8) is fixedly installed on the side plate (7), the telescopic end of the first electric push rod (8) is fixedly connected to the end of the upper base plate (5) away from the elastic metal plate (11), a material box (14) is fixedly arranged on the upper surface of the lower base plate (6), the material box (14) is provided with a plurality of material boxes (14), and the plurality of material boxes (14) are distributed at equal distances, and the material box (14) is used for storing the cold-proof and anti-freezing part (3).

Images