Cold-resistant anti-freezing high-voltage cable and manufacturing process thereof

Abstract

The invention discloses a cold-resistant anti-freezing high-voltage cable and a manufacturing process thereof, and relates to the field of cables, an interlayer is arranged between a high-voltage cable sheath and a high-voltage cable core, and a cold-resistant anti-freezing piece is arranged in the interlayer; the cold-resistant and anti-freezing piece comprises a first cold-resistant and anti-freezing strip and a second cold-resistant and anti-freezing strip, the first cold-resistant and anti-freezing strip and the second cold-resistant and anti-freezing strip are both of a trapezoidal block structure, and one end of the first cold-resistant and anti-freezing strip and one end of the second cold-resistant and anti-freezing strip are bonded to the outer ring of the high-voltage cable and the other ends of the first cold-resistant and anti-freezing strip and the second cold-resistant and anti-freezing strip are adhered to the inner ring of the high-voltage cable sheath. According to the high-voltage cable, the interlayer is arranged between the high-voltage cable sheath and the high-voltage cable core, the cold-resistant and anti-freezing part is arranged in the interlayer, the cold-resistant and anti-freezing part also plays a key role in cold resistance and freezing resistance, and the cold-resistant and anti-freezing performance of an existing high-voltage cable is greatly improved; meanwhile, due to the design of the cold-resistant anti-freezing piece, the bending resistance of the high-voltage cable is improved.

Description

Technical Field

[0001] The invention relates to the field of cables, and in particular to a cold-resistant and frost-resistant high-voltage cable and a manufacturing process thereof. Background Art

[0002] In low temperature environments, the performance of cables will be significantly affected, mainly in terms of increased conductor resistance, wider bending radius, reduced insulation performance, and embrittlement of outer insulation materials. First, as the temperature drops, the resistance of cable conductors will increase, which requires us to give priority to conductor materials with lower resistivity when selecting cables to ensure the electrical conductivity of cables at low temperatures. Secondly, low temperatures will cause cable materials to harden and become brittle, increasing the bending radius and adversely affecting the bending performance and force-bearing capacity of the cable.

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

[0004] The purpose of the present invention is to provide a cold-resistant and frost-resistant high-voltage cable and a manufacturing process thereof, so as to improve the cold-resistant and frost-resistant performance of the high-voltage cable.

[0005] To achieve the above object, the present invention provides the following technical solution: a cold-resistant and frost-resistant high-voltage cable, comprising a high-voltage cable sheath and a high-voltage cable core, wherein the high-voltage cable core is arranged inside the high-voltage cable sheath, an interlayer is arranged between the high-voltage cable sheath and the high-voltage cable core, and a cold-resistant and frost-resistant part is arranged in the interlayer; The anti-cold and anti-freeze component comprises a first anti-cold and anti-freeze strip and a second anti-cold and anti-freeze strip, both of which are in a trapezoidal block structure, one end of the first anti-cold and anti-freeze strip is bonded to the outer ring of the high-voltage cable core, and the other end of the first anti-cold and anti-freeze strip is bonded to the inner ring of the high-voltage cable sheath; The first antifreeze strip and the second antifreeze strip are provided in plurality, and the plurality of first antifreeze strips and the plurality of second antifreeze strips are distributed in the interlayer in a circular array; 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; A plurality of first cold-resistant and antifreeze strips distributed in the same section constitute a first cold-resistant and antifreeze assembly; a plurality of second cold-resistant and antifreeze strips distributed in the same section constitute a second cold-resistant and antifreeze assembly; The first cold-resistant and antifreeze components and the second cold-resistant and antifreeze components are provided in multiple groups, and the multiple groups of first cold-resistant and antifreeze components and the multiple groups of second cold-resistant and antifreeze components are distributed at equal distances along the length direction of the high-voltage cable sheath.

[0006] Preferably, the first antifreeze strip and the second antifreeze strip are both provided with air holes, and the air holes penetrate the end faces of the first and second antifreeze strips at the same time. There are multiple air holes, and the multiple air holes are distributed at equal distances.

[0007] Preferably, a first gap is formed between the sides of the first anti-cold and anti-freeze strip and the second anti-cold and anti-freeze strip that are close to each other.

[0008] Preferably, a second gap is formed between the first cold-resistant and antifreeze component and the second cold-resistant and antifreeze component adjacent to each other end to end.

[0009] Preferably, a bending-resistant sheet is arranged inside the cold-resistant and antifreeze component, and the bending-resistant sheet is an arc-shaped sheet structure, with the arc-shaped concave surface facing the outer circle of the high-voltage cable core.

[0010] Preferably, vertical sheets are provided at both ends of the bending-resistant sheet.

[0011] Preferably, the bending-resistant sheet is made of any one of aluminum alloy, copper and aluminum.

[0012] Preferably, the cold-resistant and antifreeze parts are made of any one of silicone rubber, nitrile compound and polyurethane.

[0013] Preferably, the high-voltage cable sheath comprises an outer insulating layer, a cold-resistant layer and a fire-proof layer which are arranged in sequence from the outside to the inside.

[0014] The present invention also discloses a manufacturing process of a cold-resistant and frost-proof high-voltage cable, comprising: The first step: extrusion installation, using extrusion equipment to extrude the high-voltage cable core. During the extrusion of the high-voltage cable core, a feeding mechanism installed at the outlet of the extrusion equipment is used to stick the cold-resistant and antifreeze parts on the outer ring of the high-voltage cable core, and then the extrusion equipment is used to apply an adhesive layer on the outer ring of the cold-resistant and antifreeze parts; The second step: wrapping, using 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 and antifreeze parts; Then, the cold-resistant layer is spirally wound along the axial direction of the high-voltage cable core by using a wrapping machine, so that the cold-resistant layer is wound around the outer circle of the fireproof layer; The wrapping overlap is between 50% and 70%; The third step: coating, the high-voltage cable core produced in the second step is passed through the extruder extrusion equipment, the extruder coats the insulating material on the outer circle of the cold-resistant layer to form an outer insulating layer, and the preparation of the cold-resistant and antifreeze high-voltage cable is completed after cooling; Wherein, the feeding mechanism comprises: an upper base plate and a lower base plate, the upper base plate and the lower base plate are both arranged on one side of the outlet of the extrusion device, the upper base plate is located above the lower base plate, and the upper base plate and the lower base plate are detachably installed at the outlet of the extrusion device; An elastic metal plate is fixedly provided at one end of the upper substrate, the elastic metal plate is elastic, and the elastic metal plate is a circular ring structure, one end of the elastic metal plate is open, and a second electric push rod is installed on the inner wall of the elastic metal plate, and a plurality of second electric push rods are provided, and the plurality of second electric push rods are equidistantly distributed, and an absorption plate is fixedly installed at the end of the second electric push rod, and the absorption plate is used to absorb and fix the cold and antifreeze parts, and a traction rope is connected to the end of the elastic metal plate away from the upper substrate, and the traction rope is attached to the outer ring of the elastic metal plate, and a winding machine is installed at the end of the upper substrate away from the elastic metal plate, and the winding machine is used to wind the traction rope, and a side plate is fixedly provided on the side of the lower substrate away from the elastic metal plate, and a first electric push rod is fixedly installed on the side plate, and 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, and a material box is fixedly provided on the upper surface of the lower substrate, and a plurality of material boxes are provided, and the plurality of material boxes are equidistantly distributed, and the material box is used to store the cold and antifreeze parts.

[0015] Technical effects and advantages of the present invention: The invention provides an interlayer between the high-voltage cable sheath and the high-voltage cable core, and the interlayer is provided with a cold-resistant and antifreeze component, which plays a key role in cold-resistant and antifreeze, and greatly improves the cold-resistant and antifreeze performance of the existing high-voltage cable; at the same time, the design of the cold-resistant and antifreeze component improves the bending resistance of the high-voltage cable; Heat can be accumulated in the second gap and retained for a long time, which has a good insulation effect on the high-voltage cable. The heat is not easy to lose out quickly, and at the same time, the influence of external cold air on the high-voltage cable is reduced; The air holes serve to connect the second gaps at both ends of the first cold-resistant antifreeze strip or the second cold-resistant antifreeze strip, so that the adjacent second gaps can be connected to each other. In this way, when the temperature of some areas outside the high-voltage cable core is too high, the pressure will increase when the heat accumulates, and the air pressure in the higher temperature area will press this part of the heat to the adjacent area, thereby avoiding the problem of excessive temperature in some areas caused by heat accumulation; The setting of the anti-bending sheet increases the strength of the high-voltage cable, making it difficult for the high-voltage cable to be bent, and the anti-bending sheet has good elastic recovery ability, and can quickly reset when the high-voltage cable loses the bending force; at the same time, heat accumulates in the cold-resistant and antifreeze area, especially absorbed into the anti-bending sheet in the middle of the cold-resistant and antifreeze, which plays a role of heat preservation, making it difficult for heat to be lost to the outside, and having better cold-resistant and antifreeze performance; The manufacturing method of the cold-resistant and frost-resistant high-voltage cable of the present invention has the advantage that cold-resistant and frost-resistant parts can be installed in batches in the interlayer between the high-voltage cable core and the high-voltage cable sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the cold-resistant and frost-proof high-voltage cable of the present invention.

[0017] Figure 2 It is a schematic diagram of the end face structure of the cold-resistant and frost-proof high-voltage cable of the present invention.

[0018] Figure 3 It is a radial cross-sectional view of the cold-resistant and frost-proof high-voltage cable in Example 1 of the present invention.

[0019] Figure 4 It is a radial cross-sectional view of the cold-resistant and frost-proof high-voltage cable in Example 2 of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the cold-resistant and antifreeze component of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure of the medium cold-resistant and antifreeze parts.

[0022] Figure 7 It is a schematic diagram of the pore structure of the present invention.

[0023] Figure 8 It is a schematic diagram of the structure of the bending-resistant sheet of the present invention.

[0024] Fig. 9 It is a schematic structural diagram of the feeding mechanism of the present invention.

[0025] Fig.10 It is a structural schematic diagram of the first step of resetting the feeding mechanism of the present invention.

[0026] Fig.11 It is a structural schematic diagram of the feeding mechanism of the present invention during the second step of resetting.

[0027] In the figure: 1. high-voltage cable sheath; 101. outer insulation layer; 102. cold-resistant layer; 103. fireproof layer; 2. high-voltage cable core; 3. cold-resistant and antifreeze parts; 31. first cold-resistant and antifreeze strip; 32. second cold-resistant and antifreeze 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 panel; 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 DESCRIPTION

[0028] The present invention provides Figure 1-Figure 11 A cold-resistant and frost-proof high-voltage cable and its manufacturing process are shown.

[0029] In Example 1, refer to Figure 1 As shown in , the cold-resistant and frost-proof high-voltage cable includes a high-voltage cable sheath 1 and a high-voltage cable core 2 , and the high-voltage cable core 2 is arranged inside the high-voltage cable sheath 1 .

[0030] Reference Figure 2 As shown in FIG. 1 , the high-voltage cable sheath 1 includes an outer insulating layer 101 , a cold-resistant layer 102 and a fire-proof layer 103 which are arranged in sequence from the outside to the inside.

[0031] The outer insulating layer 101 is usually made of materials such as polyethylene and polyvinyl chloride. After heating and extrusion processes, the insulating material is put on the cold-resistant layer 102 to play an insulating role.

[0032] Among them, the cold-resistant layer 102 is usually made of one or more materials selected from polystyrene foam, rubber material, thermoplastic elastomer, polyvinyl chloride, silicone rubber, nitrile compound, and polyurethane, which mainly have good thermal insulation properties and play a key role in cold and frost resistance; these materials can usually maintain flexibility at temperatures of -40°C or even lower, avoiding brittle cracking of high-voltage cables.

[0033] The fireproof layer 103 is usually made of a tape coated with fireproof paint. The fireproof paint can decompose carbon dioxide and water vapor in the event of a fire to form an insulation layer, prevent heat transfer, and protect the high-voltage cable.

[0034] refer to Figure 2 As shown in the figure, an interlayer is arranged between the high-voltage cable sheath 1 and the high-voltage cable core 2 of the present invention, and a cold-resistant and antifreeze component 3 is arranged in the interlayer. The cold-resistant and antifreeze component 3 also plays a key role in cold-resistant and antifreeze, and greatly improves the cold-resistant and antifreeze performance of the existing high-voltage cable.

[0035] Specifically, refer to Figure 3 , Figure 5 and Figure 6The anti-cold and antifreeze component 3 includes a first anti-cold and antifreeze strip 31 and a second anti-cold and antifreeze strip 32. The first anti-cold and antifreeze strip 31 and the second anti-cold and antifreeze strip 32 are both trapezoidal block structures. One end of the first anti-cold and antifreeze strip 31 and the second anti-cold and antifreeze strip 32 are bonded to the outer circle of the high-voltage cable core 2, and the other end of the first anti-cold and antifreeze strip 31 and the second anti-cold and antifreeze strip 32 are bonded to the inner circle of the high-voltage cable sheath 1; the first anti-cold and anti-cold strip 31 and the second anti-cold and antifreeze strip 32 are both provided with a plurality of them, and the plurality of first anti-cold and antifreeze strips 31 and the plurality of second anti-cold and antifreeze strips 32 are distributed in the interlayer in a circular array; the tail end of the first anti-cold and antifreeze strip 31 is located on the side of the head end of the second anti-cold and antifreeze strip 32; the plurality of first anti-cold and anti-freeze strips 31 distributed in the same section constitute a first Cold-resistant and antifreeze component; multiple second cold-resistant and antifreeze strips 32 distributed in the same section constitute a second cold-resistant and antifreeze component; the first cold-resistant and antifreeze component and the second cold-resistant and antifreeze component are each provided with multiple groups, and the multiple groups of first cold-resistant and antifreeze components and the multiple groups of second cold-resistant and antifreeze components are all distributed at equal distances along the length direction of the high-voltage cable sheath 1; due to the formation of a second gap 303 between the first cold-resistant and antifreeze components and the second cold-resistant and antifreeze components adjacent to each other at the head and tail, the interlayer is divided into many chambers of different sizes, and the high-voltage cable generates heat when it is energized. The heat can be gathered in the second gap 303 and retained for a long time, which has a better thermal insulation effect on the high-voltage cable, and the heat is not easy to lose out quickly. At the same time, the influence of external cold on the high-voltage cable is reduced.

[0036] refer to Figure 2 , Figure 6 to Figure 7 As shown in the figure, both the first anti-cold and antifreeze strip 31 and the second anti-cold and antifreeze strip 32 are provided with air holes 301, and the air holes 301 penetrate the end faces of the first and tail ends of the first and second anti-cold and antifreeze strip 31 and 32 at the same time. There are multiple air holes 301, and the multiple air holes 301 are distributed at equal distances. The air holes 301 serve to connect the second gaps 303 at the head and tail ends of the first and second anti-cold and antifreeze strips 31 and 32, so that adjacent second gaps 303 can be interconnected. In this way, when the temperature of some areas outside the high-voltage cable core 2 is too high, the pressure will increase due to heat accumulation, and the air pressure in the higher temperature area will press this part of the heat to the adjacent area, thereby avoiding the problem of excessive temperature in some areas caused by heat accumulation.

[0037] Furthermore, the cold-resistant and antifreeze component 3 provided in the present invention also has the function of increasing 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 be elastically deformed accordingly. When the first cold-resistant and antifreeze strip 31 and the second cold-resistant and antifreeze strip 32 are elastically deformed, the radial cross-section of the bent area of ​​the high-voltage cable will be completely filled, and the air hole 301 will also be flattened, so that the adjacent second gap 303 is no longer connected, so that excess gas will quickly pressurize the adjacent second gap 303, making it difficult for the bending area to continue to deform, thereby achieving good bending resistance.

[0038] refer to Figure 8 As shown in the figure, in the present invention, a bending-resistant sheet 4 is arranged inside the cold-resistant and antifreeze part 3, and the bending-resistant sheet 4 is an arc-shaped sheet structure, and the arc-shaped concave surface faces the outer circle 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 not easy to be bent, and the bending-resistant sheet 4 has good elastic recovery ability, and can quickly reset when the high-voltage cable loses the bending force.

[0039] The resistant bending sheet 4 is made of any one of aluminum alloy, copper, and aluminum. In the present invention, the resistant bending sheet 4 is made of aluminum alloy material, 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 cold-resistant and antifreeze part 3 area, especially absorbed into the resistant bending sheet 4 in the middle part of the cold-resistant and antifreeze part 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.

[0040] Taking into account that the two ends of the bending-resistant thin sheet 4 are likely to cause the first cold-resistant antifreeze strip 31 or the second cold-resistant antifreeze strip 32 to crack when it is bent, vertical thin sheets 401 are provided at both ends of the bending-resistant thin sheet 4 during actual use. The contact area between the vertical thin sheet 401 and the first cold-resistant antifreeze strip 31 or the second cold-resistant antifreeze strip 32 is large, so that when the bending-resistant thin sheet 4 is elastically deformed or reset, it is not easy to cause the first cold-resistant antifreeze strip 31 or the second cold-resistant antifreeze strip 32 to crack due to the small contact area at the end.

[0041] It should be noted that the cold-resistant and antifreeze component 3 is made of any one of silicone rubber, nitrile compound, and polyurethane. In the present invention, the cold-resistant and antifreeze component 3 is made of silicone rubber material, which has good thermal insulation performance and is easy to deform elastically.

[0042] The present invention also discloses a manufacturing process of a cold-resistant and frost-proof high-voltage cable, which specifically comprises: The first step: extrusion installation, using the first extruder to extrude the high-voltage cable core 2, in the process of extruding the high-voltage cable core 2, using the feeding mechanism installed at the outlet of the first extruder to stick the cold and antifreeze component 3 on the outer ring of the high-voltage cable core 2, and then using the first extruder to apply an adhesive layer on the outer ring of the cold and antifreeze component 3; 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 wound around the outer ring of the cold-resistant and antifreeze component 3; Then, the cold-resistant layer 102 is spirally wound along the axial direction of the high-voltage cable core 2 by using a wrapping machine, so that the cold-resistant layer 102 is wound around the outer circle of the fireproof layer 103; The wrapping overlap is between 50% and 70%; Step 3: coating, the high-voltage cable core 2 produced in the second step is passed through the second extruder, and the second extruder coats the insulating material on the outer circle of the cold-resistant layer 102 to form an outer insulating layer 101, and the preparation of the cold-resistant and antifreeze high-voltage cable is completed after cooling; The feeding mechanism includes: an upper base plate 5 and a lower base plate 6, both of which are arranged at one side of the outlet of the first extruder, the upper base plate 5 is located above the lower base plate 6, and the upper base plate 5 and the lower base plate 6 are detachably installed at the outlet of the first extruder; An elastic metal plate 11 is fixedly arranged at one end of the upper substrate 5. The elastic metal plate 11 is elastic and has 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. A plurality of second electric push rods 12 are arranged. The plurality of second electric push rods 12 are equidistantly distributed. An adsorption plate 13 is fixedly arranged at the end of the second electric push rod 12. The adsorption 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. The traction rope 10 is attached to the upper substrate 5. The outer circle of the elastic metal plate 11 is closed, and a winding machine 9 is installed on the end of the upper base plate 5 away from the elastic metal plate 11, and 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 base plate 6 away from the elastic metal plate 11, and 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 provided on the upper surface of the lower base plate 6. There are multiple material boxes 14, and the multiple material boxes 14 are equidistantly distributed. The material boxes 14 are used to store cold-resistant and antifreeze parts 3.

[0043] It should be noted that the first extruder and the second extruder are collectively referred to as extrusion equipment; and the extruder and the wrapping machine are both commonly used cable processing equipment in the prior art, which will not be described in detail here.

[0044] refer to Figures 8 to 11As shown in the figure, the advantage of the manufacturing method of the cold-resistant and antifreeze high-voltage cable in the present invention is that the cold-resistant and antifreeze parts 3 can be installed in batches in the interlayer between the high-voltage cable core 2 and the high-voltage cable sheath 1. The cold-resistant and antifreeze parts 3 can also be manually pasted in the prior art, which is not limited here, but the efficiency of installing the cold-resistant and antifreeze parts 3 is not high using a feeding mechanism.

[0045] Specifically, a plurality of first anti-cold and antifreeze strips 31 or second anti-cold and antifreeze strips 32 are placed in the corresponding material box 14. When the high-voltage cable core 2 is extruded from the first extruder, the winding machine 9 is used to reel in the traction rope 10, so that the elastic metal plate 11 is unfolded and laid flat on the lower surface of the upper substrate 5. At this time, the upper substrate 5 is pulled by the first electric push rod 8, so that the plurality of suction plates 13 correspond to the plurality of material boxes 14 one by one, and then the second electric push rod 12 is started to push the suction plate 13 down, so that the corresponding first anti-cold and antifreeze strips 31 or second anti-cold and antifreeze strips 32 can be put into the corresponding material box 14. The strip 32 is pasted on the suction plate 13, and then the second electric push rod 12 is reset, and the traction rope 10 is unwound by using the winding machine 9, and the elastic metal plate 11 is reset to a circular ring shape by using the elastic reset function. At this time, the first cold-resistant antifreeze strip 31 or the second cold-resistant antifreeze strip 32 adsorbed on the suction plate 13 is just aligned with the position corresponding to the outer circle of the high-voltage cable core 2, and the second electric push rod 12 is started, and the first cold-resistant antifreeze strip 31 or the second cold-resistant antifreeze strip 32 is pushed and bonded to the corresponding high-voltage cable core 2 by using the suction plate 13. It is simple and convenient, and can be processed in batches.

[0046] It should be noted that the suction plate 13 can use negative pressure adsorption or other methods, which are not limited here. Glue should be manually applied on the two end surfaces of the cold and antifreeze component 3 to facilitate the adhesion of the cold and antifreeze component 3 to the high-voltage cable core 2 or the high-voltage cable sheath 1. The winding machine 9 is a common winding machine and will not be elaborated here.

[0047] In Example 2, reference Figure 4 As shown in the figure, a first gap 302 is formed between the sides of the first cold-resistant and antifreeze strip 31 and the second cold-resistant and antifreeze strip 32 of the present invention that are close to each other; the heat in the adjacent second gaps 303 can pass through, which serves the purpose of complementing each other evenly, so that the external temperature of the high-voltage cable core 2 remains constant, and it is not easy for the temperature in some areas to be too high or too low. The specific size of the first gap 302 can be set according to actual needs.

Claims

1. A cold-resistant and frost-proof high-voltage cable, comprising a high-voltage cable sheath (1) and a high-voltage cable core (2), wherein the high-voltage cable core (2) is arranged inside the high-voltage cable sheath (1), and characterized in that: An interlayer is provided between the high-voltage cable sheath (1) and the high-voltage cable core (2), and a cold-resistant and antifreeze component (3) is provided in the interlayer; The anti-cold and anti-freeze component (3) comprises a first anti-cold and anti-freeze strip (31) and a second anti-cold and anti-freeze strip (32), the first anti-cold and anti-freeze strip (31) and the second anti-cold and anti-freeze strip (32) both being in a trapezoidal block structure, one end of the first anti-cold and anti-freeze strip (31) and the second anti-cold and anti-freeze strip (32) being bonded to the outer ring of the high-voltage cable core (2), and the other end of the first anti-cold and anti-freeze strip (31) and the second anti-cold and anti-freeze strip (32) being bonded to the inner ring of the high-voltage cable sheath (1); A plurality of the first cold-resistant antifreeze strips (31) and the second cold-resistant antifreeze strips (32) are provided, and the plurality of the first cold-resistant antifreeze strips (31) and the plurality of the second cold-resistant antifreeze strips (32) are distributed in the interlayer in a circular array; The tail end of the first cold-resistant and antifreeze strip (31) is located on the side of the head end of the second cold-resistant and antifreeze strip (32); A plurality of first cold-resistant and antifreeze strips (31) distributed in the same section constitute a first cold-resistant and antifreeze assembly; a plurality of second cold-resistant and antifreeze strips (32) distributed in the same section constitute a second cold-resistant and antifreeze assembly; The first cold-resistant and antifreeze components and the second cold-resistant and antifreeze components are provided in multiple groups, and the multiple groups of first cold-resistant and antifreeze components and the multiple groups of second cold-resistant and antifreeze components are distributed at equal distances along the length direction of the high-voltage cable sheath (1).

2. A cold-resistant and frost-proof high-voltage cable according to claim 1, characterized in that: The first cold-resistant antifreeze strip (31) and the second cold-resistant antifreeze strip (32) are both provided with air holes (301), the air holes (301) simultaneously penetrate the end surfaces of the first and second cold-resistant antifreeze strips (31) or the second cold-resistant antifreeze strips (32), and a plurality of air holes (301) are provided, and the plurality of air holes (301) are distributed at equal distances.

3. The cold-resistant and frost-proof high-voltage cable according to claim 1, characterized in that: A first gap (302) is formed between the mutually adjacent sides of the first cold-resistant and antifreeze strip (31) and the second cold-resistant and antifreeze strip (32).

4. The cold-resistant and frost-proof high-voltage cable according to claim 1, characterized in that: A second gap (303) is formed between the first cold-resistant and antifreeze component and the second cold-resistant and antifreeze component that are adjacent end to end.

5. The cold-resistant and frost-proof high-voltage cable according to claim 1, characterized in that: A bending-resistant sheet (4) is arranged inside the cold-resistant and antifreeze component (3); the bending-resistant sheet (4) is an arc-shaped sheet structure, with the arc-shaped concave surface facing the outer ring of the high-voltage cable core (2).

6. The cold-resistant and frost-proof high-voltage cable according to claim 5, characterized in that: Both ends of the bending-resistant thin sheet (4) are provided with vertical thin sheets (401).

7. The cold-resistant and frost-proof 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. The cold-resistant and frost-proof high-voltage cable according to claim 1, characterized in that: The cold-resistant and antifreeze component (3) is made of any one of silicone rubber, nitrile compound and polyurethane.

9. The cold-resistant and frost-proof high-voltage cable according to claim 1, characterized in that: The high-voltage cable sheath (1) comprises an outer insulating layer (101), a cold-resistant layer (102) and a fire-proof layer (103) which are arranged in sequence from the outside to the inside.

10. The manufacturing process of the cold-resistant and frost-proof high-voltage cable according to any one of claims 1 to 9, characterized in that: include: The first step is extrusion installation, using an extrusion device to extrude the high-voltage cable core (2), and in the process of extruding the high-voltage cable core (2), using a feeding mechanism installed at the outlet of the extrusion device to stick the cold and antifreeze component (3) to the outer ring of the high-voltage cable core (2), and then using the extrusion device to apply an adhesive layer to the outer ring of the cold and antifreeze component (3); Step 2: wrapping, using a wrapping machine to spirally wrap the fireproof layer (103) 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 antifreeze component (3); Then, a wrapping machine is used to spirally wind the cold-resistant layer (102) along the axial direction of the high-voltage cable core (2), so that the cold-resistant layer (102) is wound around the outer circle of the fireproof layer (103); The wrapping overlap is between 50% and 70%; Step 3: coating, the high-voltage cable core (2) produced in the second step is passed through an extruder, and the extruder coats the outer ring of the cold-resistant layer (102) with insulating material to form an outer insulating layer (101), and the preparation of the cold-resistant and frost-proof high-voltage cable is completed after cooling; The feeding mechanism comprises: an upper base plate (5) and a lower base plate (6); the upper base plate (5) and the lower base plate (6) are both arranged at one side of the outlet of the extrusion device; the upper base plate (5) is located above the lower base plate (6); the upper base plate (5) and the lower base plate (6) are detachably mounted at the outlet of the extrusion device; An elastic metal plate (11) is fixedly provided at one end of the upper base plate (5), the elastic metal plate (11) is elastic and has 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), a plurality of the second electric push rods (12) are provided, and the plurality of second electric push rods (12) are distributed at equal distances, an absorption plate (13) is fixedly provided at the end of the second electric push rod (12), the absorption plate (13) is used to absorb and fix the cold-resistant and antifreeze component (3), and a traction rope (10) is connected to the end of the elastic metal plate (11) away from the upper base plate (5), and the traction rope (10) is fitted to the upper base plate (5). A winding machine (9) is installed on the outer ring of the elastic metal plate (11) and at one end of the upper base plate (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 installed 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 one end of the upper base plate (5) away from the elastic metal plate (11). A material box (14) is fixedly installed on the upper surface of the lower base plate (6). A plurality of material boxes (14) are provided. The plurality of material boxes (14) are equidistantly distributed. The material boxes (14) are used to store cold-resistant and antifreeze parts (3).

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