High-altitude cable

Abstract

The invention relates to a high-altitude cable. The high-altitude cable comprises an oil absorbing layer, a fireproof layer, and a wire core layer, an insulation layer, a first heat conducting layer, a shielding layer, a waterproof layer and a second heat conducting layer, which successively sleeve the oil absorbing layer from inside to outside. Insulation heat conducting liquid is absorbed on the oil absorbing layer. The wire core layer comprises electric wires which are annularly distributed along the radial cross section of the cable, and heat conducting materials filling the gaps between the electric wires. Each electric wire comprises a wire core and an insulation rubber layer wrapping the exterior of the wire core. Multiple long strip-shaped cambered surfaces extending in the length directions of the cables are uniformly arranged on the outer circumferential face of the second heat conducting layer. The cambered surfaces are distributed on the radial cross sections of the cable in a polygonal manner. The middle parts of the radial cross sections of the cambered surfaces are inwards recessed towards the center of the cable. Two sides of middle parts of the radial cross sections of the cambered surfaces outwards protrude towards the exterior of the cable. According to the invention, by effectively using rain and wind outdoors, heat dissipation can be performed on the cable itself, thereby turning the harm into a benefit, so the service lifetime of the cable is effectively prolonged.

Description

technical field [0001] The invention relates to a high-altitude cable and belongs to the field of electric power transmission. Background technique [0002] Cables are widely used in production and life. Cables are usually rope-like cables twisted by several wires or groups of wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outer The bread has a highly insulating covering. Most of them are erected in the air or installed underground or underwater for telecommunications or power transmission; cables used at high altitudes have high current and voltage, high heat generation, and are likely to cause cable fatigue. The service life of the high-altitude cable is greatly shortened, and at the same time, it is inconvenient to replace and maintain the high-altitude cable, and the cost is high. Therefore, it has great practical significance to solve the heating problem of the high-altitude cable. Contents of the invention ...

AI Technical Summary

Problems solved by technology

Most of them are erected in the air or installed underground or underwater for telecommunications or power transmission; cables used at high altitudes have high current and voltage, high heat generation, and are likely to cause cable fatigue. The service life of the high-altitude cable is greatly shortened, and at the same time, it is inconvenient to replace and maintain the high-altitude cable, and the cost is high. Therefore, it is of great practical significance to solve the heating problem of the high-altitude cable

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