Method for preparing capacity-increased and energy-saving overhead power transmission shaped conductor

Abstract

The invention relates to a method for preparing a capacity-increased and energy-saving overhead power transmission shaped conductor, which comprises the following steps: (1) an aluminum base is meltedto make a round aluminum rod; (2) a round mongline is prepared; (3) the round mongline is rolled into a rectangular line; (4) the rectangular line is drawn into a shaped aluminum mongline; (5) a shaped soft aluminum mongline is obtained after continuous drawing and quenching and tempering heat treatment are conducted to the shaped aluminum mongline; (6) a material for a strength-bearing layer isselected; and (7) the twisting of a plurality of layers of the shaped soft aluminum monglines is completed once and for all in a line twisting machine, which takes the strength-bearing layer materialas the center. The method has the advantages that: the conductivity of the shaped soft aluminum conductor made by the method can reach up to 63 percent IACS or higher, which can be proven by a laboratory test report. In addition, the method can improve material utilization rate and working efficiency and reduce loss and compared with a hot extrusion method, the loss is reduced by 8 to 20 percent and the working efficiency is improved by one time.

Description

technical field [0001] The invention relates to the technical field of cable conductor production, in particular to a preparation method for capacity-increasing and energy-saving special-shaped conductors for overhead power transmission. Background technique [0002] Generally, there are two types of process methods for making high-voltage overhead conductors. The first type of single wire is drawn into a round aluminum hard single wire by a circular hole die, and then multi-strand round single wires are layered and stranded on a load-bearing single (multiple) strand circle. Shaped steel core or other circular load-bearing material outer circumference, called circular aluminum concentric stranded wire; the second type is made of special-shaped soft aluminum single wire by hot extrusion, and then layered by multiple special-shaped soft aluminum single wires Twisted around the outer circumference of a load-bearing round core. It is called different-shaped concentric stranded ...

AI Technical Summary

Problems solved by technology

[0003] The first type of circular aluminum concentric stranded conductor, because the aluminum single wire is circular, although the multiple strands are tightly twisted together, there are still unavoidable gaps between the single wires, and the surface roughness is large, generally less than 90%. Larger corona will be generated in high altitude and high voltage occasions

In addition, the hard aluminum single wire bears part of the load-bearing role in the wire, which is limited by the working temperature, and the transmission capacity cannot be increased by increasing the working temperature

[0004] The second type of special-shaped soft aluminum concentric stranded wire, the special-shaped soft wire does not play a load-bearing role in the finished wire, although it makes up for the shortcomings of the first type that are limited by the working temperature, through the load-bearing core of high strength and low wire expansion materials to increase the transmission capacity of the line, but the hot extrusion method for the special-shaped soft aluminum single line is slower than the drawing method, the material loss is large, and the manufacturing cost is high.

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