Composite insulated solid-sealed pole and production method thereof

Abstract

The invention discloses a composite insulated solid-sealed pole, comprising a vacuum interrupter. A static end cover plate and a movable end cover plate are arranged at the two ends of the vacuum interrupter, a ceramics insulating layer is arranged on the surface of the vacuum interrupter, the outer side of the ceramic insulating layer is coated with a silica gel layer, and the outer side of the silica gel layer is coated with epoxy resin, wherein the contact interface between the ceramic insulating layer and the silica gel layer is an annular corrugated surface, and the contact interface of the silicone gel layer and the epoxy resin is also an annular corrugated surface. According to the composite insulated solid-sealed pole obtained by the invention, the buffering effect of the silica gel layer of the vacuum interrupter is improved, no air bubble is caused, and the external insulation level of the vacuum interrupter can be obviously improved, The distance between the static end coverplate and the movable end cover plate of the vacuum interrupter is increased by about 30% through the arrangement of the annular corrugated surfaces, the interface state of the two materials is changed, the surface dielectric structure is changed, and the linear breakdown is avoided.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a composite insulating solid-sealed pole. Background technique [0002] In recent years, the vacuum circuit breaker has changed from an open type and an insulating type to a solid-sealed pole structure. The circuit breaker assembled with it has the advantages of small size, light weight, long life, high reliability, convenient maintenance, no pollution, and safe use. [0003] The solid-sealed pole is the solid-sealed vacuum interrupter. The vacuum interrupter and the upper and lower outlets are integrally cast with epoxy resin and packaged as a whole, which is a great progress in the insulation technology of vacuum circuit breakers. [0004] At present, the solid-sealed poles are all produced by the injection pressure gel process. The epoxy resin is injected into the mold cavity of the solid-sealed pole in a colloidal state at high temperature. After a period of heat preservat...

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Problems solved by technology

[0004] At present, the solid-sealed poles are all produced by the injection pressure gel process. The epoxy resin is injected into the mold cavity of the solid-sealed pole in a colloidal state at high temperature. After a period of heat preservation, the epoxy resin will gradually cool down. , this cooling process will generate a huge contraction force, which will cause the ceramic layer of the vacuum interrupter to break

Moreover, since epoxy resin and ceramics belong to two materials, there will be gaps and other factors at the contact interface, and these have great hidden dangers to the insulation breakdown of the solid-sealed pole.

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