Railway through ground wire and its preparation process

Abstract

The invention relates to a railway through ground wire. The railway through ground wire comprises copper stranded wires (1); the exterior of the copper stranded wires (1) is coated with an outer sheath layer (2) which is made of a rare earth copper alloy material. The outer sheath of the through ground wire is made of rare earth copper alloy, and therefore, defects of zinc-containing brass can be eliminated, and the outer sheath has strong waterproof, anti-corrosion and anti-stress performances, so the quality and the service life of the railway through ground wire can be ensured; the outer sheath has strong tensile strength and high elongation at break and low resistance, and is not easily influenced by stress, and therefore, usage requirements of the railway through ground wire can be better satisfied; the contents of mercury, lead, cadmium and chromium in the outer sheath are lower, and therefore, after being used for a long term, the outer sheath of the railway through ground wire will not pollute environment; and the copper stranded wires are sheathed in the outer sheath which is a seamless pipe, and therefore, problems of cracks appearing on existing outer sheaths and affected conductivity of the copper stranded wires caused by welding-caused high temperature can be solved.

Description

technical field [0001] The invention relates to a railway penetrating ground wire used in trunk railways and high-speed railways, and a preparation process for the railway penetrating ground wire. Background technique [0002] In my country's main line railways and high-speed railways, there is a railway through-ground wire laid on the left and right sides of the track along the entire length of the line, and the left and right two through-ground wires are connected horizontally every 50 meters, thus forming a comprehensive railway grounding system. The comprehensive grounding system makes the grounding potential consistent within a wide range of railway line lengths, and various electrical equipment that need to be grounded beside the railway track, metal objects on the line that involve personal and equipment safety, lightning leakage of the railway lightning protection system, and traction current of locomotives Convergence to the substation, etc., are all connected to th...

AI Technical Summary

Problems solved by technology

Due to the difficulty of controlling the height of the inner welding seam of the welded metal sheath pipe, on the one hand, the sheath pipe is not welded through, and the induced current on the surface of the sheath pipe is easy to occur; When the cable core is used, it is easy to produce defects such as breakage of the cable core, and these factors seriously affect its conductivity.

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