Aluminum alloy twisted wire used for ultra-high voltage transmission line

Abstract

The present invention discloses an aluminum alloy twisted wire used for an ultra-high voltage transmission line. The aluminum alloy twisted wire used for the ultra-high voltage transmission line is characterized in that an aluminum conductor cladding layer is twisted on the outer surface of a second aluminum alloy conductive layer orderly, and the aluminum conductor cladding layer is formed by twisting the Z-shaped aluminum alloy conductors; a first carbon fiber single wire and a second carbon fiber single wire are both formed by twisting a plurality of carbon fiber precursors, the space in an aluminum layer and between the carbon fiber precursors is filled with a polyester adhesive filling part, and the polyester adhesive filling part is formed by mixing a first component and a second component; the second component is formed by the following components of, by weight parts, 100 parts of acrylic acid, 30-35 parts of methyl methacrylate, 20-25 parts of ethanediol, 10-15 parts of toluene diisocynate, 1-2 parts of dibutyltin dilaurate, 0.5-1 parts of benzoyl peroxide and 0.5-0.8 parts of salicylic acid phenyl ester. The aluminum alloy twisted wire used for the ultra-high voltage transmission line of the present invention is tight in structure and high in compression coefficient, enables a bending radius to be reduced to six times of the diameter of a cable, the installation layout space and the installation cost to be reduced and the current-carrying capacity to be improved under an equal cross-section, and is easier to lay.

Description

technical field [0001] The invention relates to a power transmission wire, in particular to an aluminum alloy stranded wire for an extra-high voltage transmission line. 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 me...

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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