Tensile aluminum stranded wire for electric power transmission

Abstract

The invention discloses a tensile aluminum stranded wire for electric power transmission. The tensile aluminum stranded wire comprises a center stressed unit, a first aluminum alloy conducting layer and a second aluminum alloy conducting layer, wherein the first aluminum alloy conducting layer and the second aluminum alloy conducting layer are sequentially stranded on the outer surface of the stressed unit; an aluminum conductor wrapping layer is formed by stranding 19-21 Z-shaped aluminum alloy conductors with Z-shaped sections; the stressed unit comprises a first carbon fiber single wire located at the center and six second carbon fiber single wires stranded on the outer surface of the first carbon fiber single wire; the first carbon fiber single wire and each second carbon fiber single wire are each formed by stranding a plurality of carbon fiber precursors; a polyester adhesive filling part is formed by mixing a first component and a second component, and the first component is composed of, by weight, N-307 unsaturated polyester, butyl acrylate, 2-ethylhexyl acrylate, n-butyl alcohol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine. It is guaranteed that the carbon fiber precursors in the aluminum layers are round and normal, damage of the aluminum layers in subsequent use is avoided, reliability of electrical property is guaranteed, and the bending radius is lowered to be six times the diameter of a cable.

Description

technical field [0001] The invention relates to a power transmission wire, in particular to a tensile aluminum twisted wire for power transmission. Background technique [0002] my country's national economy continues to grow at a high speed, and the demand for electricity is increasing. According to the plan of State Grid Construction Co., Ltd., the construction of 1100kV UHV transmission lines will be focused on in recent years. In the construction of transmission lines, larger cross-section conductors are required, but the outer diameter of the conductors is not expected to be too large. Conductor design should consider many factors, especially the transmission capacity and economic current density of the conductor, corona critical voltage, mechanical strength and so on. On the one hand, in areas with narrow lines, it is only necessary to replace wires with similar cross-sectional specifications, and basically do not need to replace iron towers to meet the requirements f...

AI Technical Summary

Problems solved by technology

However, the strength of galvanized steel strand is not high, and the corrosion resistance is not strong, which shortens the overall service life of the wire

In the 1980s, aluminum-clad steel single wire appeared. At that time, due to the complicated process, it was difficult to promote. Now, it has been used in large-span lines. Its corrosion resistance is greatly enhanced, but its strength is lower than that of steel strands.

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