High-conductivity anti-icing lead and production method thereof

Abstract

The invention discloses a high-conductivity anti-icing lead and a production method thereof, aiming at improving the conductivity and anti-icing ability of cables. The high-conductivity anti-icing lead is provided with a steel strand core; the periphery of the steel strand is concentrically coated with annealed aluminum wires; the cross section of the annealed aluminum wire is in a roofing shape; and short edges are tightly arranged into a coating layer inward. The method comprises the steps of controlling a roofing duralumin mongline, annealing and concentrically stranding. Compared with the prior art, the invention has a conductivity of 63 percent IACS, can greatly reduce power consumption of lines compared with ordinary steel core aluminum wires and improves the conductivity by over 3.3 percent; the roofing annealed aluminum wire has compact structure and little clearance between the aluminum wire strands, is unlikely to be condensed on the surface of the lead during snowing and freezing rain, has an operational temperature 30 DEG C higher than the ordinary steel core aluminum wires and has enough de-icing ability; besides, the steel wires in the central layer are less likely to be polluted by rain or corrosion environment and the lead has longer service life.

Description

technical field [0001] The invention relates to a cable for power transmission and transformation lines and its manufacturing method, in particular to a wire for power transmission and transformation lines and its manufacturing method. Background technique [0002] The wires used in the prior art transmission and transformation lines include ordinary steel-cored aluminum stranded wires, aluminum alloy wires, etc., which cannot meet the ice and snow disaster weather that occurs once in 30 years. Although anti-ice and snow wires are used in some transmission lines, the The structure is basically the same as that of ordinary steel-reinforced aluminum stranded wire. The main purpose is to increase the tensile strength of the wire to prevent the wire from being broken due to ice coating. However, in heavy ice and snow areas, the wire is often covered with thick ice. However, it is easy to cause the accident of the collapse of the wire, pole and iron tower. In the ice and snow disas...

AI Technical Summary

Problems solved by technology

[0002] The wires used in the prior art transmission and transformation lines include ordinary steel-cored aluminum stranded wires, aluminum alloy wires, etc., which cannot meet the ice and snow disaster weather that occurs once in 30 years. Although anti-ice and snow wires are used in some transmission lines, the The structure is basically the same as that of ordinary steel-reinforced aluminum stranded wire. The main purpose is to increase the tensile strength of the wire to prevent the wire from being broken due to ice coating. However, in heavy ice and snow areas, the wire is often covered with thick ice. However, it is easy to cause the accident of the collapse of the wire, pole and iron tower. In the ice and snow disaster that occurred in the south of my country in early 2008, more than 70% of the lines were due to the thicker ice coating of the wire, which caused the wire fittings to fall off and the pole and iron tower to collapse, resulting in a large-scale power outage. , causing huge economic losses to the country

At the same time, the electrical conductivity of common aluminum stranded conductors and anti-icing wires with conventional structures is 61% IACS. Wire to improve conductivity, but does not have anti-ice performance; the technical solution disclosed in the Chinese utility model patent 200720306925.4 with the application date of November 12, 2007 is to add an insulating layer between the steel core and the aluminum conductor. When the wire is covered with ice or snow, the steel core is energized to heat the steel core to melt the ice. Although this solution can achieve the effect of melting ice, it needs to add an insulating layer between the steel core and the aluminum wire. To switch the current with the aluminum body conductor, it adopts the overhead wire of the prior art, and the conductivity of the wire can only reach 61% IACS

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