High-reliability low-smoke cable

Abstract

The utility model discloses a high-reliability low-smoke cable, which comprises a wire core, an insulating layer arranged on the outer side of the wire core, a polyurethane elastic filling layer arranged on the outer side of the insulating layer, a second fireproof layer arranged at the other end of the polyurethane elastic filling layer, a plastic layer arranged at the other end of the second fireproof layer, and an insulating layer arranged on the outer side of the plastic layer. The other end of the plastic layer is provided with a first fireproof layer, the other end of the first fireproof layer is provided with a waterproof layer, the heat insulation performance of the whole cable is improved through the arrangement of the polyurethane elastic filling layer, and internal heat can be transmitted to the outside under the action of the heat-conducting fins on the outer side; and meanwhile, the first fireproof layer and the second fireproof layer are arranged, so that the fireproof performance of the whole cable can be improved.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a high-reliability low-smoke cable. Background Art

[0002] Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multiple strands of wires and insulation layers, used to connect circuits, electrical appliances, etc. With the rapid development of my country's power industry, cables have become an indispensable consumable in the power industry, playing a role in the transmission of electric energy;

[0003] The traditional low-smoke halogen-free cable insulation uses XLPE (cross-linked polyethylene), and the outer sheath uses low-smoke halogen-free polyolefin material. This cable has a certain flame retardant effect because of the good flame retardant effect of the outer sheath, but the insulation material XLPE in the cable is not flame retardant, and it will soften to a molten state at high temperature, and has a certain fluidity, which may damage the surrounding facilities and materials, so it may cause secondary harm to the surrounding environment, and is not suitable for some occasions with high flame retardant requirements. Utility Model Content

[0004] The utility model aims to provide a high-reliability low-smoke cable, which solves the problem that the cable in the prior art softens to a molten state at high temperature, has a certain fluidity, and may damage surrounding facilities and materials.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-reliability low-smoke cable, comprising a wire core, an insulating layer is arranged on the outside of the wire core, a polyurethane elastic filling layer is arranged on the outside of the insulating layer, a second fireproof layer is arranged on the other end of the polyurethane elastic filling layer, and a plastic layer is arranged on the other end of the second fireproof layer;

[0006] A first fireproof layer is arranged at the other end of the plastic layer, and a waterproof layer is arranged at the other end of the first fireproof layer.

[0007] As a further description of the above technical solution: a metal braided layer is provided at the other end of the waterproof layer.

[0008] As a further description of the above technical solution: a rubber layer is provided at the other end of the metal braided layer.

[0009] As a further description of the above technical solution: a wear-resistant layer is arranged at the other end of the rubber layer.

[0010] As a further description of the above technical solution: a plurality of heat conducting plates are arranged on the outer side of the wire core.

[0011] The utility model has the following beneficial effects:

[0012] 1. Compared with the prior art, this high-reliability low-smoke cable increases the thermal insulation performance of the entire cable by setting a polyurethane elastic filling layer. Under the action of the outer heat conductive sheet, the internal heat can be transferred to the outside, thereby preventing the temperature inside the cable from being too high to cause spontaneous combustion. At the same time, the first fireproof layer and the second fireproof layer are set to improve the fireproof performance of the entire cable;

[0013] 2. Compared with the prior art, this high-reliability low-smoke cable can improve the strength of the entire cable by setting a metal braided layer inside it, and can improve its waterproof performance under the action of the waterproof layer

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-reliability low-smoke cable of the utility model;

[0017] Figure 2 This is a schematic diagram of the fireproof layer structure of a high-reliability low-smoke cable of the utility model;

[0018] Figure 3 This is a stereoscopic diagram of a high-reliability low-smoke cable of the utility model.

[0019] Legend:

[0020] 1. Wear-resistant layer; 2. Rubber layer; 3. Metal braided layer; 4. Waterproof layer; 5. Heat-conducting sheet; 6. Insulating layer; 7. Polyurethane elastic filling layer; 8. Wire core; 9. First fireproof layer; 10. Plastic layer; 11. Second fireproof layer. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-3, the utility model provides an embodiment: a high-reliability low-smoke cable, including a core 8, an insulating layer 6 is arranged on the outside of the core 8, and the insulating layer 6 can ensure the insulation performance of the entire cable to prevent leakage. A polyurethane elastic filling layer 7 is arranged on the outside of the insulating layer 6. Polyurethane elastomer, also known as polyurethane elastomer, has a large elongation and a wide hardness range; its wear resistance, biocompatibility and blood compatibility are particularly outstanding. At the same time, it also has excellent oil resistance, impact resistance, low temperature resistance, radiation resistance and load-bearing, heat insulation, insulation and other properties, making the core 8 inside the cable more stable during operation;

[0023] The other end of the polyurethane elastic filling layer 7 is provided with a second fireproof layer 11, the other end of the second fireproof layer 11 is provided with a plastic layer 10, and the other end of the plastic layer 10 is provided with a first fireproof layer 9. The first fireproof layer 9 and the second fireproof layer 11 are made of asbestos, which has high fire resistance, electrical insulation and thermal insulation, and is an important fireproof, insulating and heat-preserving material. At the same time, the plastic layer 10 in the middle is used to separate the first fireproof layer 9 and the second fireproof layer 11, and can also enhance the overall support strength of the cable. The plastic layer 10 is made of phenolic plastic, which improves the overall heat resistance and insulation of the cable.

[0024] The other end of the first fireproof layer 9 is provided with a waterproof layer 4, and the waterproof performance of the entire cable can be improved by providing the waterproof layer 4. The other end of the waterproof layer 4 is provided with a metal braided layer 3. The metal braided layer 3 is provided to enhance the strength of the cable and to improve the anti-electromagnetic interference ability of the cable. It can also play a flame retardant role. The material of the metal braided layer 3 is woven from copper wire;

[0025] The other end of the metal braided layer 3 is provided with a rubber layer 2, and the other end of the rubber layer 2 is provided with a wear-resistant layer 1. The rubber layer 2 is used to improve the wear resistance and insulation of the cable, and the outer wear-resistant layer 1 can improve the wear resistance of the entire cable;

[0026] Several heat conducting sheets 5 are arranged on the outside of the core 8, which can transfer the internal heat to the outside, thereby preventing the temperature inside the cable from being too high and causing spontaneous combustion.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A high reliability low smoke cable, comprising a wire core (8), characterized in that: An insulating layer (6) is provided on the outer side of the wire core (8), a polyurethane elastic filling layer (7) is provided on the outer side of the insulating layer (6), a second fireproof layer (11) is provided on the other end of the polyurethane elastic filling layer (7), and a plastic layer (10) is provided on the other end of the second fireproof layer (11); A first fireproof layer (9) is provided at the other end of the plastic layer (10), and a waterproof layer (4) is provided at the other end of the first fireproof layer (9).

2. A high reliability low smoke cable according to claim 1, characterized in that: The other end of the waterproof layer (4) is provided with a metal braided layer (3).

3. A high reliability low smoke cable according to claim 2, characterized in that: The other end of the metal braided layer (3) is provided with a rubber layer (2).

4. A high reliability low smoke cable according to claim 3, characterized in that: The other end of the rubber layer (2) is provided with a wear-resistant layer (1).

5. A high reliability low smoke cable according to claim 1, characterized in that: A plurality of heat conducting sheets (5) are arranged on the outer side of the wire core (8).

Images