Bending-resistant cable

Abstract

The utility model relates to the technical field of cables, in particular to a bending-resistant cable, which comprises a sheath and a heat insulation layer, three leads are arranged in the sheath in a penetrating manner, a heat insulation layer is sleeved on the surface of the sheath, the heat insulation layer is a foamed polypropylene layer and positioned in the heat insulation layer, the heat insulation layer is a polyethylene layer, and the heat insulation layer is a polyethylene layer. The surface of the heat preservation layer is sleeved with a waterproof layer which is a polyvinyl chloride layer, and the waterproof layer is fixedly connected with the heat insulation layer. According to the utility model, since the foaming polypropylene material is internally provided with a large number of air cavities, heat exchange between the sheath and the outside can be reduced, the lead generates heat in the power transmission process, and the heat of the lead can heat the sheath by means of the thermal insulation layer, thereby preventing the sheath from hardening, improving the bending resistance of the cable, and prolonging the service life of the cable. And by arranging the heat insulation layer made of a polyethylene material, external low temperature can be further isolated, and the bending resistance of the cable is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a bending-resistant cable. Background Art

[0002] A cable is a collection of wires used to transmit power or signals. It is usually composed of one or more insulated wires and a sheath wrapped around the wires. The wires are usually made of conductive materials such as copper or aluminum and are used to transmit electric current. Cables are an important part of power lines.

[0003] The above and prior art have the following defects: when laying cables in a low temperature environment, the sheath is easy to harden due to the low external temperature. When the cable is shaken by wind, the hardened cable sheath surface is easy to crack, thereby shortening the service life of the cable.

[0004] Therefore, a bending-resistant cable is proposed. Utility Model Content

[0005] The utility model aims to solve the disadvantages that the sheath is easy to harden due to low external temperature, and when the cable is shaken by wind, the hardened cable sheath surface is easy to crack, and a bending-resistant cable is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bending-resistant cable, comprising a sheath and a thermal insulation layer, three conductors are passed through the sheath, a thermal insulation layer is provided on the surface of the sheath, the thermal insulation layer is a foamed polypropylene layer, the thermal insulation layer is located inside the thermal insulation layer, and the thermal insulation layer is a polyethylene layer.

[0007] The effects achieved by the above components are: since the foamed polypropylene material has a large number of air cavities inside, the heat exchange between the sheath and the outside world can be reduced. At the same time, the wire will generate heat during the power transmission process. With the help of the thermal insulation layer, the heat of the wire can heat the sheath, thereby preventing the sheath from hardening and improving the bending resistance of the cable. By setting a thermal insulation layer made of polyethylene material, it can further isolate the low temperature of the outside world and further improve the bending resistance of the cable.

[0008] Preferably, the surface of the thermal insulation layer is covered with a waterproof layer, the waterproof layer is a polyvinyl chloride layer, and the waterproof layer is fixedly connected to the thermal insulation layer.

[0009] The effects achieved by the above components are: the waterproof layer made of polyvinyl chloride material can prevent water vapor from penetrating into the thermal insulation layer, thereby ensuring that the thermal insulation layer can function normally.

[0010] Preferably, the outer cross-section of the thermal insulation layer is a wavy structure.

[0011] The effect achieved by the above components is that the wavy structure on the outer side of the thermal insulation layer can improve the tightness of the connection with the waterproof layer.

[0012] Preferably, a plurality of cavities are provided in the heat insulation layer.

[0013] The effect achieved by the above components is that the heat preservation effect of the heat insulation layer can be improved by arranging the cavity in the heat insulation layer.

[0014] Preferably, a protective net is fixedly connected inside the thermal insulation layer, the protective net is a nylon fiber woven net, and the cavity is located between the thermal insulation layer and the protective net.

[0015] The effect achieved by the above components is: since the nylon fiber woven mesh has high strength and good puncture resistance, the protective net can increase the strength of the insulation layer and prevent the insulation layer with the cavity from being punctured.

[0016] Preferably, the surface of the thermal insulation layer is coated with a wear-resistant coating, and the wear-resistant coating is a polytetrafluoroethylene coating.

[0017] The effect achieved by the above components is: during the transportation and installation of cables, the wear-resistant coating made of polytetrafluoroethylene coating material can improve the wear resistance of the thermal insulation layer and extend the service life of the thermal insulation layer.

[0018] Preferably, an isolation strip is provided in the sheath, the cross section of the isolation strip is "Y"-shaped, the isolation strip is a polyvinyl chloride strip, and a plurality of protrusions are provided on the surface of the isolation strip.

[0019] The effects achieved by the above components are: since the polyvinyl chloride material has insulating properties, the isolation strip can prevent the wires from contacting each other and causing a short circuit, and the wavy structure on the outside of the insulation layer can improve the tightness of the connection with the waterproof layer.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] In the utility model, since there are a large number of air cavities inside the foamed polypropylene material, the heat exchange between the sheath and the outside world can be reduced. At the same time, the conductor will generate heat during the power transmission process. With the help of the thermal insulation layer, the heat of the conductor can heat the sheath, thereby preventing the sheath from hardening and improving the bending resistance of the cable. By setting a thermal insulation layer made of polyethylene material, it can further isolate the low temperature of the outside world and further improve the bending resistance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2This is a schematic diagram of the structure of the protective net of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the isolation strip of the utility model.

[0025] Legend: 1. Sheath; 2. Wire; 3. Insulation layer; 4. Waterproof layer; 5. Heat insulation layer; 6. Cavity; 7. Protective net; 8. Wear-resistant coating; 9. Isolation strip. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0028] like Figure 1-Figure 3 As shown, the utility model provides a bending-resistant cable, including a sheath 1 and a thermal insulation layer 5, three conductors 2 are inserted into the sheath 1, and a thermal insulation layer 3 is sheathed on the surface of the sheath 1, the thermal insulation layer 3 is a foamed polypropylene layer, the thermal insulation layer 3 is located inside the thermal insulation layer 5, and the thermal insulation layer 5 is a polyethylene layer. Since the foamed polypropylene material has a large number of air cavities inside, the heat exchange between the sheath 1 and the outside world can be reduced. At the same time, the conductors 2 will generate heat during the power transmission process. With the help of the thermal insulation layer 3, the heat of the conductors 2 can heat the sheath 1, thereby preventing the sheath 1 from hardening. By providing the thermal insulation layer 5 made of polyethylene material, the low temperature of the outside world can be further isolated, and the bending resistance of the cable can be further improved. The surface of the thermal insulation layer 3 is sheathed with a waterproof layer 4, which is a polyvinyl chloride layer. The waterproof layer 4 is fixedly connected to the thermal insulation layer 5, and the waterproof layer 4 made of polyvinyl chloride can prevent water vapor from penetrating into the thermal insulation layer 3, thereby ensuring that the thermal insulation layer 3 can function normally.

[0029] like Figure 1-Figure 3As shown, the outer cross-section of the thermal insulation layer 3 is a wavy structure, and the wavy structure of the outer side of the thermal insulation layer 3 can improve the tightness of the connection with the waterproof layer 4. A plurality of cavities 6 are provided in the thermal insulation layer 5. By providing the cavities 6 in the thermal insulation layer 5, the thermal insulation effect of the thermal insulation layer 5 can be improved. A protective net 7 is fixedly connected to the thermal insulation layer 5, and the protective net 7 is a nylon fiber woven net. The cavity 6 is located between the thermal insulation layer 3 and the protective net 7. Since the nylon fiber woven net has high strength and good puncture resistance, the protective net 7 can improve the strength of the thermal insulation layer 5 and prevent the thermal insulation layer 5 provided with the cavity 6 from being punctured. The surface of 5 is coated with a wear-resistant coating 8, which is a polytetrafluoroethylene coating. During the transportation and installation of cables, the wear-resistant coating 8 made of polytetrafluoroethylene coating material can improve the wear resistance of the insulation layer 5 and extend the service life of the insulation layer 5. An isolation strip 9 is inserted into the sheath 1. The cross-section of the isolation strip 9 is "Y"-shaped. The isolation strip 9 is a polyvinyl chloride strip. A plurality of protrusions are provided on the surface of the isolation strip 9. Since the polyvinyl chloride material is insulating, the isolation strip 9 can prevent the wires 2 from contacting each other and causing a short circuit. The wavy structure on the outside of the insulation layer 3 can improve the tightness of the connection with the waterproof layer 4.

[0030] The overall working principle is that since there are a large number of air cavities inside the foamed polypropylene material, the heat exchange between the sheath 1 and the outside world can be reduced. At the same time, the conductor 2 will generate heat during the power transmission process. With the help of the thermal insulation layer 3, the heat of the conductor 2 can heat the sheath 1, thereby preventing the sheath 1 from hardening. By setting the thermal insulation layer 5 made of polyethylene material, the low temperature of the outside world can be further isolated, and the bending resistance of the cable can be further improved. The waterproof layer 4 made of polyvinyl chloride can prevent water vapor from penetrating into the thermal insulation layer 3, thereby ensuring that the thermal insulation layer 3 can function normally. By setting the cavity 6 in the thermal insulation layer 5 It can improve the thermal insulation effect of the thermal insulation layer 5. Since the nylon fiber woven mesh has high strength and good puncture resistance, the protective net 7 can improve the strength of the thermal insulation layer 5 and prevent the thermal insulation layer 5 with the cavity 6 from being punctured. During the transportation and installation of cables, the wear-resistant coating 8 made of polytetrafluoroethylene paint can improve the wear resistance of the thermal insulation layer 5 and extend the service life of the thermal insulation layer 5. Since the polyvinyl chloride material has insulating properties, the isolation strip 9 can prevent the wires 2 from contacting each other and causing a short circuit. The wavy structure on the outside of the thermal insulation layer 3 can improve the tightness of the connection with the waterproof layer 4.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A bending-resistant cable, comprising a sheath (1) and a heat-insulating layer (5), characterized in that: Three conductors (2) are inserted into the sheath (1), and a heat-insulating layer (3) is provided on the surface of the sheath (1). The heat-insulating layer (3) is a foamed polypropylene layer. The heat-insulating layer (3) is located inside a heat-insulating layer (5), and the heat-insulating layer (5) is a polyethylene layer.

2. A bending-resistant cable according to claim 1, characterized in that: The surface of the thermal insulation layer (3) is covered with a waterproof layer (4), the waterproof layer (4) is a polyvinyl chloride layer, and the waterproof layer (4) is fixedly connected to the thermal insulation layer (5).

3. A bending-resistant cable according to claim 2, characterized in that: The outer cross-section of the thermal insulation layer (3) is in a wavy structure.

4. The bending-resistant cable according to claim 1, characterized in that: A plurality of cavities (6) are provided in the heat insulation layer (5).

5. A bending-resistant cable according to claim 4, characterized in that: A protective net (7) is fixedly connected inside the thermal insulation layer (5), and the protective net (7) is a nylon fiber woven net. The cavity (6) is located between the thermal insulation layer (3) and the protective net (7).

6. The bending-resistant cable according to claim 1, characterized in that: The surface of the heat insulation layer (5) is coated with a wear-resistant coating (8), and the wear-resistant coating (8) is a polytetrafluoroethylene coating.

7. The bending-resistant cable according to claim 1, characterized in that: An isolation strip (9) is inserted into the sheath (1), the cross section of the isolation strip (9) is in a "Y" shape, the isolation strip (9) is a polyvinyl chloride strip, and a plurality of protrusions are provided on the surface of the isolation strip (9).

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