Novel inflame-retardant aluminum alloy cable

Abstract

The invention relates to a novel inflame-retardant aluminum alloy cable which comprises at least one cable core, the structure of a single cable core is that the cable core comprises conductors, and the periphery of each conductor is wrapped with an insulation layer which is formed by double-layer co-extrusion of irradiation type crosslinking polyethylene and a low smoke zero halogen polyolefin insulation material; a filler is arranged on the cable core; the peripheries of the cable core and the fillers are wrapped with a taped covering, a lining layer, a metal armoring layer and an outer sheath sequentially. According to the novel inflame-retardant aluminum alloy cable, the structure is compact and reasonable, the production technological process is simple, the cost is low, the size is small, the weight is light, the flame retardant property is superior, the tensile resistance, the creep, the elongation, the electric conductivity and the like of the conductors are excellent, the compression resistance is high, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a novel flame-retardant 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 15%. At present, the conductors used in the wire and cable industry are mainly copper and aluminum. Due to the rapid rise of copper prices, the cost of cables with copper core conductors remains high, so that aluminum is proposed to replace copper around the world. my country's proven aluminum reserves rank first in the world, and it has abundant raw material reserves, while copper resources are relatively scarce. At present, a large part of them needs to be imported. In order to change the dependence of cables on copper materials, make full use of domestic resources, and ensure the sustainable development of the power industry. The key to development is to vigorously promote aluminum as a cond...

AI Technical Summary

Problems solved by technology

In the cable industry, aluminum is an ideal material to replace copper, but pure aluminum conductors have the following disadvantages: poor mechanical strength, easy creep, easy overload and heat generation, etc.

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%, 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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