An insulating material for a solid-sealed pole, a solid-sealed pole for a circuit breaker, and a preparation method thereof

Abstract

The invention relates to an insulating material for an embedded pole, and the embedded pole for a breaker and a preparation method thereof, belonging to the technical field of vacuum circuit breakers. The insulating material for the embedded pole comprises, by weight, 55 to 60% of nylon, 30 to 35% of glass fiber and 10 to 12% of an auxiliary agent, wherein the auxiliary agent is an antioxidant and silicone in a mass ratio of 1: 1-2. The expansion coefficient of the insulating material is more close to the expansion coefficient of a ceramic shell of a vacuum explosion chamber; the insulating material overcomes the problem of cracking of an insulation shell body caused by great difference between expansion coefficients in alternative hot and cold environments; product surface quality is improved; and product production efficiency is enhanced.

Description

technical field [0001] The invention relates to an insulating material for a solid-sealed pole, a solid-sealed pole for a circuit breaker and a preparation method thereof, belonging to the technical field of vacuum circuit breakers. Background technique [0002] In the field of medium-voltage power transmission, especially in the 12kV class, vacuum circuit breakers are widely used. The wide application of vacuum circuit breakers is inseparable from the continuous progress of vacuum circuit breaker technology, the most important of which is the technological progress of solid-sealed poles. The pole insulation of vacuum circuit breakers has gone through three stages: air insulation, composite insulation, and solid-seal insulation, which also correspond to three generations of vacuum circuit breakers. The solid-sealed pole belongs to the third-generation pole insulation product. It adopts the automatic pressure gel forming process (APG) and uses epoxy resin to encapsulate the ...

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Problems solved by technology

[0003] However, there are many problems with the solid-sealed poles currently used in the market: the temperature rises, because the poles are sealed with epoxy resin and the coating thickness is relatively large, the heat dissipation is relatively poor, and the problem of temperature rise is prone to occur; easy to crack , The expansion coefficient difference between the ceramic shell of the vacuum interrupter and the epoxy resin is too large, which will cause cracking problems. In addition, operating vibration, impact, dynamic and thermal stability or environmental temperature changes will also cause cracking of the epoxy resin shell; Degradation, after the product is scrapped, the waste cannot be reused, and the degradation cycle is long, which cannot meet the requirements of environmental friendliness; the quality is large, due to the limitation of the material characteristics of epoxy resin, the amount of material is large, resulting in high quality of the product

However, the insulating material of the above-mentioned solid-sealed pole has poor fluidity during casting, and the expansion coefficient of the insulating material is relatively different from that of the ceramic shell of the vacuum interrupter, which will still cause cracks on the surface of the insulating shell, which is not conducive to solidification. The outer surface of the insulating shell of the sealed pole forms a good surface quality, and the processing efficiency is also low, resulting in low production efficiency of the solid-sealed pole

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