Reinforced optical fiber composite high-temperature-resistant overhead insulating cable

Abstract

The invention discloses a reinforced optical fiber composite high-temperature-resistant overhead insulating cable which comprises a carbon fiber composite reinforced core. A plurality of round flexible aluminum wires and a stainless steel sleeve light unit are stranded on the outer side of the carbon fiber composite reinforced core in a concentric mode. A plurality of special-shaped flexible aluminum monofilaments which are distributed in a round shape are arranged on the outer sides of the round flexible aluminum wires and the outside of the stainless steel sleeve light unit, and a high-temperature-resistant insulating layer is arranged on the outer sides of the special-shaped flexible aluminum monofilaments. The reinforced optical fiber composite high-temperature-resistant overhead insulating cable is simple in structure, long in service life and suitable for reconstruction and construction of power grid overhead lines in urban and rural areas, can bear the tension strength of 2400Mpa, allows long-time operation temperature to be more than 180 DEG C, has communication and monitoring functions, can effectively solve the dropping problem of the cable, and guarantees safe operation of lines.

Description

technical field [0001] The invention relates to an overhead insulated cable, in particular to a reinforced optical fiber composite high temperature resistant overhead insulated cable. [0002] Background technique [0003] As we all know, conventional overhead insulated cables usually use copper stranded wires, aluminum stranded wires, aluminum alloy stranded wires, steel-cored aluminum stranded wires, etc. as conductors, and an insulating layer is extruded outside the conductors. The strength performance index is the best, and can achieve 1240Mpa-1410Mpa, but in rural areas, mountainous areas, and forest areas, the air corridors that can be used are gradually reduced, the distance between poles and towers increases, the line environment deteriorates, the line tension increases, and the sag increases accordingly. The requirements for tensile strength have been greatly increased, and conventional overhead insulated cables can no longer bear it; and the insulation layer is us...

AI Technical Summary

Problems solved by technology

[0003] As we all know, conventional overhead insulated cables usually use copper stranded wires, aluminum stranded wires, aluminum alloy stranded wires, steel-cored aluminum stranded wires, etc. as conductors. Insulation-clad composition, among which the steel-cored aluminum stranded wire conductor has the best tensile strength performance index, which can achieve 1240Mpa-1410Mpa, but in rural areas, mountainous areas, and forest areas, the air corridors that can be used are gradually reduced, and the distance between poles and towers increases. Deterioration, the tension of the line increases, the sag increases accordingly, and the requirements for the tensile strength of the line are greatly increased, which cannot be tolerated by conventional overhead insulated cables; and the insulating layer is usually made of polyvinyl chloride, polyethylene, cross-linked polyethylene, etc., of which XLPE insulation has the highest insulation performance and temperature resistance level, and the long-term allowable operating temperature is only 90°C, which still cannot meet the requirements for heavy-load lines. The overhead insulated cables produced by the existing technology do not have communication functions at the same time. Therefore, the original overhead insulated cables cannot meet the needs of the new situation of the power system in terms of function, laying environment, temperature resistance level and current carrying capacity, especially the requirements of the new type of overhead lines for the construction of a strong smart grid in the country.

[0004] In recent years, cable companies have generally realized the shortcomings of overhead insulated cables, and are constantly exploring and improving them. For example, Chinese patent 200820178715.6 discloses a single or multi-strand steel wire as the central reinforcing core, and then twists aluminum or aluminum wires outside it. Alloy conductors still do not have the required tensile strength; and the structure of copper-clad steel and aluminum-clad steel strands used in Chinese patent 200920208822.3, the structure bears the tensile force or steel wire, compared with the aforementioned, there is no substantial difference. Improvement; in terms of photoelectric composite, Chinese patent 200920231879.5 discloses that the optical unit of the stainless steel tube is twisted into the conductor as a combination of communication and electric power, but it ignores that under high-strength tension, the line itself cannot bear enough tension to protect the light. The reliable operation of the unit is still unable to meet the safe operation of overhead insulated cables in complex geographical environments such as mountains and hills, and does not meet the high tensile strength, high temperature rise and current carrying capacity, and stability of communication functions of overhead insulated cables under the new situation. High "three high" requirements

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