High-voltage sleeve with uniform electric field function, and cable terminal

Abstract

The invention discloses a high-voltage sleeve with a uniform electric field function. The high-voltage sleeve has a pipe hole which extends from bottom to top. The outside edge of the longitudinal profile of the high-voltage sleeve comprises a first curve, a second curve and a third curve or line, wherein the first curve, the second curve, the third curve or line are formed through successive smooth connection. According to the high-voltage sleeve, a material which is formed through surrounding a pipe hole as a central axis on a plane which is composed of the inner hole of the pipe hole and the outer edge of the high-voltage sleeve is a solid insulating medium, and the outside surface of the high-voltage sleeve is provided with a conductive or semi-conductive layer. The first curve and theconductive or semi-conductive layer perform a function of uniforming the inner electric field of the solid insulating medium. The third curve or line can effectively reduce the voltage gradient on the surface of the solid insulating medium. The downwards projected structure of the second sleeve can maximally reduce the electric field of the conductive or semi-conductive layer at end of the firstcurve. The high-voltage sleeve can be produced in an integral mold injection manner. The conductive or semi-conductive layer on the outer surface is obtained through a coating or spraying manner. Thehigh-voltage sleeve has advantages of simple process, no easy entering of impurities into the high-voltage sleeve, and high quality.

Description

technical field [0001] The invention belongs to the technical field of electric power, and relates to a bushing and a cable terminal for an electric power outdoor terminal. Background technique [0002] At present, in high-voltage bushings using solid insulating media and power products with similar structures, shielding nets made of conductive or semi-conductive materials are usually used to shield and uniform the internal and surface electric fields of the products. In order to form a good electric field distribution inside and on the surface of the solid insulating medium, a shielding net is molded inside the solid insulating medium to improve the reliability of the product under high voltage conditions. [0003] However, the mesh of the shielding mesh needs to be formed by stamping. During the stamping process, burrs are likely to be generated on the edge of the mesh, and the existence of burrs will cause partial discharge and cause safety hazards. It is easy to remain ...

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Problems solved by technology

[0003] However, the mesh of the shielding net needs to be formed by stamping. During the stamping process, burrs are likely to be generated on the edge of the mesh, and the existence of burrs will cause partial discharge and cause safety hazards. It is easy to remain on the surface of the shielding net, and it is easy to mold into the solid insulating medium together with the shielding net. From this point of view, the method of using the shielding net is not only complicated in process, but also easy to penetrate debris

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