Combined electrode column of vacuum arc extinguishing chamber

Abstract

The invention relates to a combined electrode column of a vacuum arc extinguishing chamber which overcomes the problems of lower flow capacity and weaker heat radiating capability which may seriously reach the vitrification temperature of epoxy resin to cause major accidents in the traditional sealing electrode column. The combined electrode column is characterized in that epoxy resin perfusion points are arranged in the mutual connecting positions of an upper shielding ring, an upper insulating barrel, an upper wire outlet end, a lower insulating barrel and a shielding electrode; pre-mixed epoxy resin and a solidifying agent are perfused for firmly connecting the shielding electrode, the lower insulating barrel, the upper wire outlet end, the upper insulating barrel and the upper shielding ring together to form an outer cover of the electrode column; the vacuum arc extinguishing chamber is assembled in the outer cover of the electrode column; and the conductive connection of the electrode column is realized through a movable contact, a spring touching finger and a lower wire outlet end. The combined electrode column has the advantages that the manufacturing technology of the electrode column is simplified; the insulating capability of the electrode column is enhanced; the manufacturing cost of the electrode column is reduced; once the vacuum arc extinguishing chamber self has a quality problem, only the vacuum arc extinguishing chamber needs replacing; an outer electrode column still can be used continuously; and therefore, the installation and the replacement of the vacuum arc extinguishing chamber are convenient.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical appliances, and in particular relates to a pole column of a combined vacuum interrupter used in a vacuum circuit breaker of a 126kV high-voltage system. Background technique [0002] In the prior art, the poles of the vacuum interrupter are usually solid-sealed poles, which are made by the APG (automatic pressure gel) process, which requires several sets of special automatic pressure gel molds, vacuum mixers, molding machines, post-processing For special equipment such as curing constant temperature heating box, the finished pole must be inspected by X-ray perspective to determine whether there are internal defects. Therefore, the investment in molds and equipment is large, and the production cycle is long, especially X-ray perspective inspection. A special high-power X-ray machine is required, which is very expensive, and a special lead room and labor protection measures are also ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the poles of the vacuum interrupter are usually solid-sealed poles, which are made by the APG (automatic pressure gel) process, which requires several sets of special automatic pressure gel molds, vacuum mixers, molding machines, post-processing For special equipment such as curing constant temperature heating box, the finished pole must be inspected by X-ray perspective to determine whether there are internal defects. Therefore, the investment in molds and equipment is large, and the production cycle is long, especially X-ray perspective inspection. A special high-power X-ray machine is required, which is very expensive, and a special lead room and labor protection measures are also required. Once a quality problem occurs during the sealing process, not only the epoxy resin and silicone parts of the pole need to be smashed and scrapped, Even the expensive vacuum interrupter may be scrapped at the same time, so the production is more difficult. With the increase of the voltage level, the size of the vacuum interrupter continues to increase, the difficulty of manufacture is also increasing, and the cost is increasing. In addition, because the vacuum interrupter is completely sealed inside the epoxy resin shell, the flow capacity is low, the heat dissipation capacity is weak, and the temperature rise of the pole is high. In severe cases, it may reach the glass transition temperature of epoxy resin , resulting in a major accident

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