Cold-resistant cable

Abstract

The utility model relates to a cold-resistant cable, and relates to the field of cables. Comprising a cable body and an elastic sheath layer arranged on the cable body, the elastic sheath layer wraps the cable body, an opening is formed in the elastic sheath layer, the opening is in a long strip shape, the inner wall of the opening is in a closed state when not subjected to external force, a nickel-titanium alloy strip is arranged on the elastic sheath layer, the nickel-titanium alloy strip abuts against the cable body, and the elastic sheath layer wraps the cable body. And the nickel-titanium alloy strip is heated to deform to open the opening. The opening is formed in the elastic sheath layer on the outer side of the cable body, and the nickel-titanium alloy strip is arranged on the elastic sheath layer to control the opening and closing of the opening, so that when the cable body is locally overheated, the nickel-titanium alloy strip deforms and expands to jack up the elastic sheath layer on one side of the opening to open the opening, and the overheated part is cooled.

Description

Technical fields:

[0001] This utility model belongs to the technical field of cables, and specifically refers to a cold-resistant cable. Background technology:

[0002] A cable is a conductor made of one or more insulated conductors and an outer insulating protective layer, used to transmit electricity or information from one point to another. Cold-resistant cables typically use specially formulated materials such as cross-linked polyethylene (XLPE) and polyvinyl chloride (PVC) as insulation, enabling the cable to maintain stable insulation performance at low temperatures. High-purity oxygen-free copper or aluminum alloys are also used to ensure good conductivity at low temperatures.

[0003] Among related technologies, cold-resistant cables have good thermal insulation properties, but they are not easy to dissipate heat when local overheating occurs due to electrical or aging reasons, which needs to be improved. Summary of the Invention:

[0004] The purpose of this invention is to provide a cold-resistant cable to solve the technical problems mentioned in the background section.

[0005] This utility model is implemented as follows:

[0006] A cold-resistant cable includes a cable body and an elastic sheath layer disposed on the cable body. The elastic sheath layer wraps around the cable body and has an opening that is elongated. The inner wall of the opening is closed when not subjected to external force. A nickel-titanium alloy strip is disposed on the elastic sheath layer and abuts against the cable body. The nickel-titanium alloy strip deforms when heated, opening the opening.

[0007] Preferably, the elastic sheath layer includes a plurality of elastic sleeves and a plurality of pressure-resistant sleeves disposed on the cable body, the plurality of elastic sleeves being spaced apart, the pressure-resistant sleeves being located between adjacent elastic sleeves, the opening being formed on the elastic sleeve, and the nickel-titanium alloy strip being disposed on the elastic sleeve.

[0008] Preferably, a flange is formed on the elastic sleeve, the flange being located on the side of the opening near the nickel-titanium alloy strip, the flange being located on the side of the opening near the nickel-titanium alloy strip, the flange being used to cover the opening.

[0009] Preferably, an insulating layer is provided on the inner side of the elastic sheath layer, and the insulating layer is arranged around the outer periphery of the cable.

[0010] Preferably, the cable body includes a plurality of cable cores, a heat insulation layer and a heat insulation layer, wherein the cable cores are located in the inner layer of the heat insulation layer, the heat insulation layer is located in the outer layer of the heat insulation layer, and the elastic sheath is located in the outer layer of the heat insulation layer.

[0011] Preferably, it further includes a flame-retardant layer, which is located between the cable core and the insulation layer.

[0012] Preferably, a heat-conducting mesh is provided on the insulation layer, and the heat-conducting mesh is located inside the insulation layer.

[0013] Preferably, the heat-conducting mesh is an alumina heat-conducting mesh.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] 1. This utility model opens an opening in the elastic sheath layer on the outside of the cable body and sets a nickel-titanium alloy strip on the elastic sheath layer to control the opening. When the cable body is locally overheated, the nickel-titanium alloy strip deforms and expands, lifting the elastic sheath layer on one side of the opening to open the opening and dissipate heat from the overheated area.

[0016] 2. The elastic sheath layer of this utility model is formed by combining an elastic sleeve and a pressure-resistant sleeve, which helps to increase the pressure resistance of the elastic sheath;

[0017] 3. This utility model provides a flame-retardant layer, a heat-insulating layer, and a thermal insulation layer in sequence outside the cable core, which makes it difficult for the internal temperature of the cable to be lost and helps to improve the cold resistance of the cable. Attached image description:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the present invention, mainly showing the internal structure of the cable.

[0020] Instruction manual drawing reference numerals: 1. Cable body; 11. Cable core; 12. Flame retardant layer; 13. Thermal insulation layer; 14. Heat insulation layer; 15. Insulation layer two; 16. Heat-conducting mesh; 161. Alumina heat-conducting mesh; 2. Elastic sheath layer; 21. Elastic sleeve; 211. Opening; 212. Strip groove; 213. Flange; 22. Compression sleeve; 23. Insulation layer one; 24. Nickel-titanium alloy strip. Detailed implementation method:

[0021] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —2:

[0022] This application discloses a cold-resistant cable. See also: A cold-resistant cable... Figure 1 It includes a cable body 1 and an elastic sheath layer 2. The elastic sheath layer 2 is arranged around the outer periphery of the cable body 1 and covers the outer periphery of the cable body 1. The elastic sheath layer 2 is fixedly connected to the cable body 1.

[0023] See Figure 1 and Figure 2 The cable body 1 includes several cable cores 11, a flame-retardant layer 12, a heat insulation layer 13, and a heat insulation layer 14. The cable cores 11 are located inside the flame-retardant layer 12, the flame-retardant layer 12 is located between the heat insulation layer 13 and the cable cores 11, the heat insulation layer 13 is located inside the heat insulation layer 14, and the flame-retardant layer 12 is arranged around the outer periphery of the cable cores 11. A second insulation layer 15 is also provided on the cable cores 11, wrapping around several cable cores 11. The second insulation layer 15 is located between the cable cores 11 and the flame-retardant layer 12, and an elastic sheath layer 2 is located outside the heat insulation layer 14. The cable cores 11, the second insulation layer 15, the flame-retardant layer 13, the heat insulation layer 13, and the heat insulation layer 14 are fixed together. In this embodiment, the several cable cores 11 are composed of a conductor, an insulating sheath, and a shielding sheath.

[0024] By setting up the heat insulation layer 14 and the thermal insulation layer 13, the thermal insulation effect of the cable is improved, and the cable's cold resistance under extremely cold temperatures is increased. By setting up the flame retardant layer 12, when the external environment of the cable catches fire, the heat insulation layer 14 and the flame retardant layer 12 reduce the transfer of external heat to the cable core 11, thus protecting the cable core 11. In this embodiment, the main material of the flame retardant layer 12 is neoprene rubber; the main material of the thermal insulation layer 13 is polyurethane foam; and the main material of the heat insulation layer 14 is ceramic fiber.

[0025] See Figure 1 and Figure 2 A heat-conducting mesh 16 is fixed inside the insulation layer 13. The heat-conducting mesh 16 is an alumina heat-conducting mesh 161, which is distributed around the outer periphery of the flame-retardant layer 12. The alumina heat-conducting mesh 161 combines thermal conductivity and flame retardancy, which helps to improve the flame retardancy of the cable core 11.

[0026] See Figure 1 and Figure 2 The elastic sheath layer 2 includes several elastic sleeves 21 and several pressure-resistant sleeves 22. The distribution direction of the elastic sleeves 21 is parallel to the length direction of the cable core 11. The elastic sleeves 21 are spaced apart. Both the elastic sleeves 21 and the pressure-resistant sleeves 22 are arranged around the outer periphery of the heat insulation layer 14. The pressure-resistant sleeves 22 are located between adjacent elastic sleeves 21. The pressure-resistant sleeves 22 and elastic sleeves 21 are arranged alternately. An insulating layer 23 is fixed inside the elastic sleeves 21. The insulating layer 23 is attached to the outer peripheral wall of the heat insulation layer 14 and wraps around the heat insulation layer 14. A section of the cable is shown in Figure 1 of this specification.

[0027] In actual installation, the spacing between adjacent pressure-resistant sleeves 22 at cable bends is less than the spacing at cable straight sections.

[0028] See Figure 1 and Figure 2An opening 211 is provided on the elastic sleeve 21. The opening 211 is elongated and parallel to the length of the cable core 11. The inner wall of the opening 211 is closed when no external force is applied. A strip groove 212 is provided on the side of the elastic sleeve 21 near the second insulation layer 15. The length of the strip groove 212 is parallel to the length of the cable core 11. A nickel-titanium alloy strip 24 is fixed on the elastic sleeve 21. The strip groove 212 is for the nickel-titanium alloy strip 24 to be inserted. The nickel-titanium alloy strip 24 is located on one side of the opening 211. The end of the nickel-titanium alloy strip 24 near the first insulation layer 23 abuts against the first insulation layer 23. When the nickel-titanium alloy strip 24 is heated, it deforms and expands, pushing up the elastic sleeve 21 and opening the opening 211 to dissipate heat locally from the cable body 1.

[0029] See Figure 1 and Figure 2 A flange 213 is machined onto the elastic sleeve 21. One end of the flange 213 near the elastic sleeve 21 is used to fit against the surface of the elastic sleeve 21, and the flange 213 covers the opening 211. The end of the flange 213 near the nickel-titanium alloy strip 24 is fixedly connected to the elastic sleeve 21. By providing the flange 213, dust is reduced from entering the cable through the opening 211. When the nickel-titanium alloy strip 24 is heated and deforms, it causes the flange 213 to move away from the cable core 11, opening the opening 211. This facilitates timely heat dissipation after the internal temperature of the cable body 1 rises.

[0030] In this embodiment, the nickel-titanium alloy strip 24 is composed of several segments to facilitate bending of the cable.

[0031] The implementation principle of a cold-resistant cable in this application embodiment is as follows: when part of the cable overheats, the nickel-titanium alloy strip 24 deforms and opens the opening 211 to dissipate heat, thereby achieving local heat dissipation of the cable.

[0032] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A cold-resistant cable, characterized by: The cable includes a cable body (1) and an elastic sheath layer (2) disposed on the cable body (1). The elastic sheath layer (2) wraps the cable body (1). An opening (211) is provided on the elastic sheath layer (2). The opening (211) is elongated. The inner wall of the opening (211) is closed when not subjected to external force. A nickel-titanium alloy strip (24) is provided on the elastic sheath layer (2). The nickel-titanium alloy strip (24) abuts against the cable body (1). The nickel-titanium alloy strip (24) deforms due to heat and opens the opening (211).

2. A cold-resistant cable according to claim 1, characterized in that: The elastic sheath layer (2) includes a plurality of elastic sleeves (21) disposed on the cable body (1) and a plurality of pressure-resistant sleeves (22) disposed on the cable body (1). The plurality of elastic sleeves (21) are spaced apart, and the pressure-resistant sleeves (22) are located between adjacent elastic sleeves (21). The opening (211) is opened on the elastic sleeve (21), and the nickel-titanium alloy strip (24) is disposed on the elastic sleeve (21).

3. A cold-resistant cable according to claim 2, characterized in that: A flange (213) is formed on the elastic sleeve (21). The flange (213) is located on the side of the opening (211) close to the nickel-titanium alloy strip (24). The flange (213) is used to cover the opening (211).

4. A cold-resistant cable according to claim 1, characterized in that: The inner side of the elastic sheath layer (2) is provided with an insulating layer (23), which is arranged around the outer periphery of the cable body (1).

5. The cold-resistant cable according to claim 1, characterized in that: The cable body (1) includes several cable cores (11), a heat insulation layer (13) and a heat insulation layer (14). The cable cores (11) are located in the inner layer of the heat insulation layer (13), the heat insulation layer (14) is located in the outer layer of the heat insulation layer (13), and the elastic sheath layer (2) is located in the outer layer of the heat insulation layer (14).

6. A cold-resistant cable according to claim 5, characterized in that: It also includes a flame-retardant layer (12) located between the cable core (11) and the insulation layer (13).

7. A cold-resistant cable according to claim 6, characterized in that: The insulation layer (13) is provided with a heat-conducting mesh (16), which is located inside the insulation layer (13).

8. A cold-resistant cable according to claim 7, characterized in that: The heat-conducting mesh (16) is an alumina heat-conducting mesh (161).

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