High-voltage-resistant pulse foaming insulation single wire

Abstract

The invention discloses a high-voltage-resistant pulse foaming insulation single wire, which comprises a conductor, wherein a semi-conductive layer wraps the conductor, an insulation layer is extruded outside the semi-conductive layer, and the insulation layer sequentially comprises a foaming layer and an outer skin layer from inside to outside. The semi-conductive layer is arranged between the conductor and the foaming insulating layer, so that air gap discharge is eliminated, the voltage resistance and corona resistance of the insulation single wire are obviously improved, the pulse voltage resistance of the insulation single wire can be obviously improved, the reliability of the wire is improved, and the insulation single wire is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of wires, in particular to a high withstand voltage pulse foam insulated single wire. Background technique [0002] At present, the existing railway digital signal cables generally have a skin-foam-skin structure, and the skin and foam layer are polyolefin insulating materials. This type of cable is used for non-insulated frequency-shifting automatic blocking track circuits. Its skin is a polyolefin solid insulation layer, and the thickness of the inner skin is generally less than 0.10mm. Its main function is to bond copper conductors, prevent water vapor from infiltrating longitudinally and damage the characteristics of the cable, and also have electrical insulation. The foam insulation layer is polyolefin foam. The outer skin is a polyolefin solid insulating layer. The inner skin insulating layer of this skin foam skin structure can not improve the corona withstand voltage, eliminate air gap discharge, and...

AI Technical Summary

Problems solved by technology

Its skin is a polyolefin solid insulation layer, and the thickness of the inner skin is generally less than 0.10mm. Its main function is to bond copper conductors, prevent water vapor from infiltrating longitudinally and damage the characteristics of the cable, and also have electrical insulation. The foam insulation layer is polyolefin foam. The outer skin is a polyolefin solid insulating layer. The inner skin insulating layer of this skin foam skin structure can not improve the corona withstand voltage, eliminate air gap discharge, and the anti-pulse voltage is low. The insulating layer is easily broken down by high pulse voltage signals, causing conductors to mix lines. , resulting in signal transmission failure

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