Bimetal composite conductor power cable
By designing a buffer layer in the cable to buffer the expansion of the steel wire reinforcement layer and reducing heat transfer through the heat insulation layer, the problem of damage to the cable due to heat transfer in high temperature environments is solved, and the tensile performance and strength of the cable are improved.
Patent Information
- Application Number
- CN202420690263.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In high temperature environments, existing cables may cause heat to be transmitted to the inside of the cable due to the expansion of the steel wire reinforcement layer, which may cause damage or failure of the cable.
Design a dual -metal composite conductor power cable, which uses the structure of the wire core, internal insulation layer, insulation layer, shielding layer, outer insulation layer, and protective layer set from the inside to the outside. To strengthen the layer and protective cover, the buffer layer reduces heat transmission through the buffer gap and support edges of the jacket layer and the inner sleeve layer.
In high temperature environments, the buffer layer buffer the expansion of the reinforcement layer of the steel wire, reduce the transmission of the heat to the wire core, avoid damage or failure of the cable, and improve the tensile performance and strength of the cable.
Smart Images
Figure CN222394599U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cables, in particular to a bimetallic composite conductor power cable. Background Art
[0002] In order to improve the tensile performance and strength of the cable, there is a cable in the prior art that uses two layers of fine steel wires in different arrangements as part of the cable protective layer. However, as a metal material, steel wire has a high thermal conductivity and is easy to expand when heated, and heat is easily transferred to the inside of the cable, which may cause damage or failure of the cable. Utility Model Content
[0003] In view of the above problems, the utility model provides a bimetallic composite conductor power cable, which can buffer the expansion of the steel wire reinforcement layer and reduce the heat transferred to the inside of the cable.
[0004] The technical solution of the utility model is as follows:
[0005] A bimetallic composite conductor power cable comprises a wire core, an inner heat insulation layer, an insulating layer, a shielding layer, an outer heat insulation layer and a protective layer which are arranged in sequence from the inside to the outside. The protective layer comprises a buffer layer, a steel wire reinforcement layer and a sheath in sequence from the inside to the outside. The conductor of the wire core is a composite metal conductor.
[0006] In a further technical solution, the inner insulation layer and the outer insulation layer are both made of silicone rubber.
[0007] In a further technical solution, the steel wire reinforcement layer includes inner steel wires which are arranged in parallel and in a circular array outside the inner sheath, and outer steel wires which are arranged in a spiral shape outside the inner steel wires.
[0008] In a further technical solution, the buffer layer includes an outer sleeve layer and an inner sleeve layer, a buffer gap is provided between the outer sleeve layer and the inner sleeve layer, and an annular array in the buffer gap has a supporting edge connecting the outer sleeve layer and the inner sleeve layer.
[0009] In a further technical solution, the sheath and the buffer layer are both made of polyvinyl chloride.
[0010] In a further technical solution, the conductor of the core is made of a copper-clad aluminum alloy composite material.
[0011] The beneficial effects of the utility model are:
[0012] 1. On the basis of improving the tensile performance and strength of the cable by the steel wire reinforcement layer, the buffer layer is provided to buffer the extrusion effect of the heat expansion of the steel wire reinforcement layer on the inside of the cable under high temperature environment, and the outer insulation layer and the inner insulation layer can reduce the heat introduced into the wire core by the steel wire reinforcement layer in layers, so as to avoid damage or failure of the cable caused by excessive expansion of the wire core due to heat;
[0013] 2. The buffer gap of the buffer layer is conducive to offsetting part of the extrusion effect, and the supporting edge can improve the supporting effect of the buffer layer and reduce the deformation amplitude of the buffer layer when it is extruded;
[0014] 3. The wire core made of copper-clad aluminum alloy composite material has low cost and strong stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a cross-sectional schematic diagram of a bimetallic composite conductor power cable according to an embodiment of the utility model;
[0016] Figure 2 It is a cross-sectional schematic diagram of the buffer layer described in the embodiment of the utility model.
[0017] Description of reference numerals:
[0018] 1. Wire core; 2. Inner insulation layer; 3. Insulation layer; 4. Shielding layer; 5. Outer insulation layer; 6. Buffer layer; 61. Inner jacket layer; 62. Outer jacket layer; 63. Support edge; 7. Steel wire reinforcement layer; 8. Sheath. DETAILED DESCRIPTION
[0019] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.
[0020] Example:
[0021] like Figure 1 As shown, a bimetallic composite conductor power cable comprises a wire core 1, an inner thermal insulation layer 2, an insulating layer 3, a shielding layer 4, an outer thermal insulation layer 5 and a protective layer which are arranged in sequence from the inside to the outside. The inner thermal insulation layer 2 and the outer thermal insulation layer 5 can both be made of silicone rubber material, which has excellent high temperature resistance and excellent electrical insulation performance; the protective layer comprises a buffer layer 6, a steel wire reinforcement layer 7 and a sheath 8 in sequence from the inside to the outside. The conductor of the wire core 1 is made of a copper-clad aluminum alloy composite material. The wire core 1 made of the copper-clad aluminum alloy composite material has low cost and strong stability.
[0022] The working principle of the above technical solution is as follows:
[0023] On the basis of the steel wire reinforcement layer 7 improving the tensile performance and strength of the cable, a buffer layer 6 is provided to buffer the squeezing effect of the steel wire reinforcement layer 7 on the inside of the cable due to thermal expansion in a high temperature environment, and the outer insulation layer 5 and the inner insulation layer 2 are arranged to reduce the heat introduced into the core 1 by the steel wire reinforcement layer 7 in a layered manner, thereby avoiding damage or malfunction of the cable due to excessive expansion of the core 1 due to heat.
[0024] In another embodiment, the steel wire reinforcement layer 7 includes inner steel wires arranged in parallel and in an annular array outside the inner sheath 8 and outer steel wires spirally arranged outside the inner steel wires. The inner steel wires provide better tensile properties, while the outer steel wires can improve the strength of the cable, making the cable less susceptible to damage on the outside.
[0025] In another embodiment, if Figure 2 As shown, the buffer layer 6 includes an outer layer 62 and an inner layer 61, a buffer gap is provided between the outer layer 62 and the inner layer 61, and a supporting edge 63 is provided in an annular array in the buffer gap to connect the outer layer 62 and the inner layer 61. The buffer gap of the buffer layer 6 is conducive to offsetting part of the extrusion effect, and the supporting edge 63 can improve the supporting effect of the buffer layer 6 and reduce the deformation amplitude of the buffer layer 6 when it is extruded.
[0026] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A bimetallic composite conductor power cable, characterized in that: It comprises a wire core, an inner heat insulation layer, an insulating layer, a shielding layer, an outer heat insulation layer and a protective layer which are arranged in sequence from the inside to the outside. The protective layer comprises a buffer layer, a steel wire reinforcement layer and a sheath in sequence from the inside to the outside. The conductor of the wire core is a composite metal conductor.
2. A bimetallic composite conductor power cable according to claim 1, characterized in that: The inner heat insulation layer and the outer heat insulation layer are both made of silicone rubber.
3. A bimetallic composite conductor power cable according to claim 1, characterized in that: The steel wire reinforcement layer comprises inner steel wires which are arranged in parallel and in an annular array outside the inner sheath, and outer steel wires which are arranged in a spiral shape outside the inner steel wires.
4. A bimetallic composite conductor power cable according to claim 1, characterized in that: The buffer layer comprises an outer sleeve layer and an inner sleeve layer, a buffer gap is arranged between the outer sleeve layer and the inner sleeve layer, and a supporting edge connecting the outer sleeve layer and the inner sleeve layer is arranged in an annular array in the buffer gap.
5. A bimetallic composite conductor power cable according to claim 4, characterized in that: The sheath and the buffer layer are both made of polyvinyl chloride.
6. A bimetallic composite conductor power cable according to claim 1, characterized in that: The conductor of the wire core is made of copper-clad aluminum alloy composite material.