Aluminum stranded wire for overhead power transmission

Abstract

The invention discloses an aluminum twisted wire for overhead power transmission. The aluminum twisted wire comprises a stressed unit positioned at the center, and a first aluminum conducting layer, a second aluminum conducting layer and a third aluminum conducting layer which are sequentially twisted with the outer surface of the stressed unit, wherein the stressed unit comprises a first carbon fiber single wire and 6 second carbon fiber single wires twisted with the outer surface of the first carbon fiber single wire; polyester adhesive filling parts are filled in an aluminum layer and positioned among a plurality of carbon fiber raw yarns; the polyester adhesive filling parts are formed by mixing a first component and a second component according to the mass ratio of 1:(2 to 4); the first component comprises the following raw materials in parts by weight: N-307 unsaturated polyester, butyl acrylate, iso-octyl acrylate, normal butanol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine. The aluminum twisted wire not only guarantees the round of the carbon fiber raw yarns in the aluminum layer, but also avoids the aluminum layer damage during subsequent use, thereby guaranteeing the reliability of the electrical property, and the bending radius is reduced to 6 times the diameter of a cable.

Description

technical field [0001] The invention relates to an overhead wire, in particular to an aluminum stranded wire for overhead power transmission. Background technique [0002] The aluminum wire for overhead power transmission is a special wire with good performance, especially in areas with narrow lines, only need to replace the wire with similar cross-section specifications, and basically do not need to replace the iron tower to meet the requirements of strength and wire to ground, but in In application, as the temperature of the wire rises, its sag will inevitably increase. However, the original tower cannot have a large margin to meet the increase in sag, so it is difficult to increase the capacity of the tower by 40-50% in the original corridor. [0003] On the other hand, the existing aluminum conductors use galvanized steel strands as the force-bearing unit. This structure has been used for more than one hundred years and is a traditional structure. However, the strength...

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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