Aluminum alloy cable

Abstract

The invention provides an aluminum alloy cable. The aluminum alloy cable comprises an aluminum alloy conductor, a heat-insulation inflaming retarding layer, a metal sheath, a bituminous coating and an outer sheath, wherein the aluminum alloy conductor is formed by three aluminum alloy cable cores and insulating layers which respectively cover the three aluminum alloy cable cores; the section of each aluminum alloy cable core is a solid sector-shaped section; the section of the aluminum alloy conductor is a circular section formed by the three solid sector-shaped sections; the aluminum alloy conductor is covered by the heat-insulation inflaming retarding layer formed by basalt fiber cloth; the metal sheath formed by an aluminum alloy covers the heat-insulation inflaming retarding layer; the bituminous coating is arranged on the metal sheath; and the outer sheath covers the bituminous coating. The aluminum alloy cable disclosed by the invention has the advantages of compact structure, good flexibility, great tensile strength, stable electric performance, good creep resistance, good fire resistance and long service life.

Description

technical field [0001] The invention relates to a power transmission cable, in particular to an aluminum alloy cable. Background technique [0002] With the rapid development of the power industry, the demand for cables is increasing at an annual growth rate of 10-15%. At present, the conductors used in the wire and cable industry are mainly copper and aluminum. Due to the rapid increase in copper prices, in order to reduce production costs, the world's wire and cable industry has proposed the method of using aluminum instead of copper as wire and cable conductors. At present, my country's aluminum production capacity is excessive. At the same time, the gap of copper needs to be imported. In order to change the dependence on copper, make full use of domestic resources, and ensure the sustainable development of the power industry, the key is to vigorously promote aluminum as a conductor of wire and cable. . Aluminum is an ideal material to replace copper in the cable industr...

AI Technical Summary

Problems solved by technology

The compression coefficient of conventional stranded conductors reaches about 0.9. To achieve the same electrical performance, the cross-sectional area of ​​aluminum conductors needs to be two grades larger than that of copper conductors or 50% larger, the outer diameter of conductors is larger, and the safety level of steel tape armoring is Low, when subjected to external destructive forces, its resistance is poor, it is easy to cause breakdown, and the weight is heavy, the installation cost is quite high, coupled with poor corrosion resistance, the service life is not long

This kind of ordinary cable structure cannot run for a long time in harsh environments, and the processing is more complicated and difficult

Under normal circumstances, the existing cables can meet the requirements, but if the cables are used in harsh environments and environments that require relatively high cable safety, they cannot meet the requirements for use.

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