High-strength insulated overhead cable

Abstract

The invention discloses a high-strength insulated overhead cable. The cable comprises a cable core; an aluminum alloy electric wire core is arranged inside the cable core; a wire core sheath is arranged outside the cable core; the aluminum alloy electric wire core is a high-strength aluminum alloy electric wire core; a steel wire aluminum stranded wire is arranged in the center of the aluminum alloy electric wire core; a plurality of conductive layers are arranged outside the steel wire aluminum stranded wire; the conductive layers are made of aluminum alloy stranded wires; the aluminum alloystranded wire forming the innermost conductive layer is wound on the surface of the steel wire aluminum stranded wire; and the aluminum alloy stranded wires forming other conductive layers are stranded and wound in sequence. The high-strength aluminum alloy electric wire core and the conductive layers are matched to replace the direct use of the steel wire aluminum stranded wire in a traditional process, so that the stability, the tensile property, the creep resistance and the elongation rate of cable transmission are enhanced, and meanwhile, the weight of the cable is reduced. In addition, the wire core sheath with a three-layer structure wraps the outer side of the high-strength aluminum alloy electric wire core, so that the performances of tensile resistance, water avoidance, weather resistance, salt spray resistance and the like of the cable in a severe environment are enhanced.

Description

technical field [0001] The invention relates to the technical field of power transmission cable products, in particular to a high-strength insulated overhead cable. Background technique [0002] 110KV aluminum alloy overhead cables are mostly used for overhead power transmission that can touch the conductors such as branches below. It is often necessary to climb mountains and ridges and use support towers for overhead cables. There are also high requirements for creep performance and elongation, as well as light weight, which cannot be met by existing overhead cable cores. For this reason, the invention patent CN201810200932 discloses a heat-resistant compression overhead cable and its preparation method. The cable of this patent includes a cable core and a core protective sleeve wrapped outside the cable core. The conductor core and the conductive layer, the conductive layer has several heat-resistant aluminum alloy cores and they are twisted and wound sequentially from th...

AI Technical Summary

Problems solved by technology

However, this kind of cable with aluminum alloy conductor core is relatively lacking in tensile strength, water avoidance, weather resistance, salt resistance and other performances in harsh environments, and in the process of stretching or creep, the aluminum alloy conductor core is easier to break off

In addition, some cables mainly use steel wire and aluminum stranded wire. Although the strength is higher, the weight of the entire cable is relatively large.

Images