Unbraced expanded steel-cored aluminum stranded wire

Abstract

The present invention relates to an unbraced expanded steel-cored aluminum stranded wire, belonging to the technical field of overhead transmission lines. The unbraced expanded steel-cored aluminum stranded wire is suitable for severe using environments such as high voltage, high altitude and bold wind and has the characteristics of saved material, reduced corona, reduced energy consumption, reduced vibration and prolonged service life. The unbraced expanded steel-cored aluminum stranded wire comprises an outer aluminum stranded wire layer, a hollow structure layer and a center reinforced steel stranded wire, wherein the hollow structure layer is arranged between the outer aluminum stranded wire layer and the center reinforced steel stranded wire. The hollow structure layer is annular. The outer aluminum stranded wire layer is composed of an inner aluminum conduction wire layer and an outer aluminum conduction wire layer. The inner aluminum conduction wire layer uses a T-shaped wire; and the outer aluminum conduction wire layer uses a T shaped wire, a Z-shaped wire, an S-shaped wire or a round wire. The inner aluminum conduction wire layer of the outer aluminum stranded wire is stranded leftwards, and the outer aluminum conduction wire layer of the outer aluminum stranded wire is stranded rightwards. The unbraced expanded steel-cored aluminum stranded wire is an expanded conduction wire with the characteristics of large expanding rate, stable structure, simple manufacturing process, high tensile strength of the conduction wire, and excellent self-damping performance.

Description

technical field [0001] The invention relates to an unsupported expanded-diameter steel-cored aluminum stranded wire in the field of overhead transmission lines. The wire can adapt to harsh environments such as high voltage, high altitude, and strong winds. It has the advantages of saving materials, reducing corona, and reducing energy consumption. , vibration reduction, extended service life and other characteristics. Background technique [0002] When the overhead transmission line is in a harsh location such as high voltage, high altitude, and strong winds, high requirements are placed on the electric field, magnetic field, corona, radio interference, and vibration resistance of the overhead wire. In order to save line materials, reduce the corona loss of wires, reduce energy consumption, improve the safe use of wires, and prolong the service life of wires. In order to solve this series of problems, the designers of transmission lines have thought of many ways, such as lo...

AI Technical Summary

Problems solved by technology

However, due to the poor structural stability of the loose-twisted expanded diameter wire, limited diameter expansion rate, and easy strand jumping during the pay-off process; the support core of the supported expanded diameter wire is difficult to process, the manufacturing cost is high, and the bending performance of the wire is poor; the strength of the hollow expanded diameter wire Low, difficult to manufacture and other defects

At present, the expanded diameter wires of these structures cannot fully meet the requirements of high voltage, high altitude, and strong wind areas.

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