New type pre-twisted armored wire protection bar

Abstract

The invention discloses a new type pre-twisted armored wire protection bar which includes a wire core. An inner layer stranded wire is wrapped around an outer surface of the wire core in a twisted manner, and an electrically conductive heat insulation composite layer is wrapped around an outer surface of the inner layer stranded wire. In the new type pre-twisted armored wire protection bar, the electrically conductive heat insulation composite layer is adopted and consists of an outer carbon fiber layer, a ceramic fiber layer and an inner carbon fiber layer. A heat insulation function can be fulfilled via the ceramic fiber layer, a phenomenon that much heat is generated to cause thermal damage to the wire core when a short-circuit current surge can be prevented, and safety of the wire corecan be ensured; an outer silica gel adhering layer and the ceramic fiber layer are adhered and pressed in a combined manner to form the outer carbon fiber layer, and an inner silica gel adhering layer and the ceramic fiber layer are adhered and pressed in a combined manner to form the inner carbon fiber layer; integrity of the outer carbon fiber layer, the ceramic fiber layer and the inner carbonfiber layer can be improved; the outer carbon fiber layer and the inner carbon fiber layer are electrically conductive; the wire protection bar is enable to have an electric conduction function, a high temperature resistant function, a thermal insulation function, a function of preventing external force-caused damage and a continuing function; the wire core can be effectively protected.

Description

technical field [0001] The invention relates to the technical field of cable protection, in particular to a novel pre-twisted armored protective wire. Background technique [0002] In high-voltage power steel-cored aluminum stranded conductors, OPGW, steel strands or aluminum-clad steel ground wires, copper-clad steel catenary cables or additional conductors in electrified railway catenary, protective wires are often used to protect and connect them. [0003] Most of the existing protective wires only have the function of preventing external damage. There is no good solution for the short-circuit and high-current impact caused by the overlapping of foreign objects, which will cause high-temperature burns to the wires, or the effect is not ideal. Once the overlapping occurs Burning of wires caused by short circuit not only affects the normal wire transmission, but also makes maintenance difficult, resulting in incalculable economic losses. In view of the above problems, a new...

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Problems solved by technology

[0003] Most of the existing protective wires only have the function of preventing external damage. There is no good solution for the short-circuit and high-current impact caused by the overlapping of foreign objects, which will cause high-temperature burns to the wires, or the effect is not ideal. Once the overlapping occurs Short circuit causes wire burns, which not only affects normal wire transmission, but also is difficult to maintain, and the economic losses caused are incalculable. In view of the above problems, a new type of pre-twisted armored wire is proposed to solve the above problems

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