Highly conductive heat-resistant aluminum conductor and production process thereof

Abstract

The invention discloses a highly conductive heat-resistant aluminum conductor and a production process thereof. The highly conductive heat-resistant aluminum conductor is characterized by comprising a bearing core wire and an electric conductor, wherein the bearing core wire is a steel strand fabricated by stranding a plurality of high-strength or ultrahigh-strength steel wires with the tensile strength being equal to or larger than 1560 MPa, the electric conductor is fabricated by stranding highly conductive heat-resistant aluminum round wires and aluminum mold lines with the conductivity being higher than 62 percent IACS (International Annealed Copper Standard) on the periphery of the core wire, the bearing steel core wire is subjected to prestress treatment and has low creep rate and ultrahigh strength, and the electric conductor is subjected to heat treatment at the temperature of not more than 400 DEG C so as to resist heat and enable the strength remaining rate to be higher than 95 percent after being heated at the temperature of 150 DEG C for 1 hour. As a power transmission line, the highly conductive heat-resistant aluminum conductor disclosed by the invention can run at a high temperature of 150 DEG C for a long time, has excellent and high conductivity and good sag property, is applicable to capacitance expansion of newly built transmission lines and old transmission lines, and has the remarkable advantages of high conductivity, heat resistance, good sag property, less loss of transmission lines, smoothness of surface, and high resistance to wind, vibration, freezing, rain and snow.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of power transmission lines, and specifically relates to the design and manufacture technology of conductors for power transmission lines. Background technique [0002] Existing wires for power transmission lines consist of conductors and load-bearing parts, wherein the conductors are electrical aluminum round single wires with a conductivity of 61% IACS, and the load-bearing parts are galvanized steel round single wires, which are twisted into The allowable working temperature of the wire is 70-80°C. Due to the increasing transmission capacity of the line, in order to increase the transmission capacity of the line, one is to add a new transmission line, but under the condition of tight land use, it is considered unless it is very urgent and other methods are difficult to solve; another way to expand capacity is to use For the original transmission line, if the allowable temperatur...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the increase of transmission capacity of existing transmission lines, it is necessary to add transmission lines or increase the cross-sectional area of ​​wires and then transform the iron tower, use steel core heat-resistant aluminum alloy wires, increase the temperature rise but increase the loss and energy consumption of transmission lines and increase The sag and heat-resistant aluminum alloy conductors with Invar cores also have large line losses and high erection costs. The present invention provides a high-conductivity heat-resistant aluminum conductor and its production process, which can increase the transmission capacity while improving the thermal expansion coefficient of the conductor. Small, good sag characteristics, the sag of the wire meets the requirements when the capacity is increased, it can run for a long time at a temperature of 150°C, and can withstand the test of 230°C, 1hr heating operation, and the strength residual rate is > 95%, that is, the strength reduction is not large. Excellent characteristics greater than 5%, and the surface of the wire is smooth, the structure is compact, and it has excellent wind resistance performance

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