A protective sleeve for high voltage cables

Abstract

Disclosed in the invention is a novel protection casing tube for a high-voltage cable. The protection casing tube comprises a metal casing tube with a breaking seam at a side wall; a welding tube is arranged in the breaking seam; and the welding tube and the metal casing tube are welded. According to the invention, because the breaking seam is arranged at the side wall of the metal casing tube and the welding tube is used for filling of the breaking seam, a high-voltage cable protection function can be realized and induced currents can be effectively prevented from forming a loop in the metal casing tube to reduce heat energy generation, thereby reducing the influence on the metal casing tube by the induced currents to a great extent and improving the security performance of the protection casing tube to some extent. Because the metal casing tube is formed by welding of a plurality of metal casing tube bodies and a plurality of welding tubes, parts of metal casing tube bodies can be laid firstly during the using process and only breaking seams for high-voltage wire inserting are needed to be left at the metal casing tube bodies; and after the high-voltage wires are inserted into the metal casing tube bodies, the welding is carried out, the laying can be carried out conveniently.

Description

technical field [0001] The invention relates to the technical field of electric power equipment, in particular to a protective sleeve for high-voltage cables. Background technique [0002] As we all know, electric energy is one of the essential energy sources in people's daily life. In order to reduce the loss rate of electric energy and improve the long-distance transmission capacity of electric energy, people often use high-voltage cables to realize efficient and long-distance transmission of electric energy. At present, in order to protect high-voltage cables, the traditional method is to wrap a layer of protective sleeves on the outer layer of high-voltage cables. Traditional protective sleeves are mainly divided into two types, one is PVC plastic pipe, and the other is plated with anti-corrosion function. Zinc steel pipe; but through long-term practice, it is found that the above two protective sleeves have the following defects. First, because the main disadvantage of ...

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Problems solved by technology

At present, in order to protect high-voltage cables, the traditional method is to wrap a layer of protective sleeves on the outer layer of high-voltage cables. Traditional protective sleeves are mainly divided into two types, one is PVC plastic pipe, and the other is plated with anti-corrosion function. Zinc steel pipe; but through long-term practice, it is found that the above two protective sleeves have the following defects. First, because the main disadvantage of PVC plastic pipes is that the strength is not high enough, people often intentionally or unintentionally The high-voltage cable in the protective sleeve is damaged, which has a certain degree of impact on people's industry and life; secondly, although the galvanized steel pipe has high strength, due to the use of the high-voltage cable, there will be traffic around it. The electromagnetic field is changed, so an induced current is generated inside the galvanized steel pipe, also known as an eddy current. This induced current will cause the galvanized steel pipe to heat up, thereby causing power loss. At the same time, there are certain safety hazards when the induced current is too large

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