Fixed-sealing pole column

Abstract

The invention discloses a fixing sealing pole column, comprising a contact, a shell and a vacuum arc-extinguishing chamber. The shell is molded by hot injection molding technology of environment-friendly plastics, wrapped in the middle and lower parts of the contact and outside of vacuum arc extinguishing to form a fixed sealing pole; The vacuum arc-extinguishing chamber comprises a static contact, a porcelain bottle and a movable contact; The static contact and the movable contact are respectively arranged at both ends of the vacuum arc-extinguishing chamber, and the joints of the static contacts and the porcelain bottle are wrapped by a stainless steel layer; The contact comprises a special-shaped part and a round cover part, wherein the bottom end of the special-shaped part is connectedwith the top end of the round cover part, and the center of the round cover part is provided with a groove matched with the static contact of the vacuum arc-extinguishing chamber; The round cover part is matched with the stainless steel layer at the static contact end of the vacuum arc-extinguishing chamber; The static contact of the vacuum arc-extinguishing chamber is arranged in the central groove of the round cover part, the lower part of the abnormal part of the contact is connected with the static contact through the electric connector, and the round cover part is in close contact with and coated on the stainless steel layer of the vacuum arc-extinguishing chamber, so as to prevent the stainless steel layer of the vacuum arc-extinguishing chamber from being deformed due to the excessive pressure during the injection molding process of the shell.

Description

technical field [0001] The invention relates to a solid-sealed pole, in particular to an environmentally-friendly plastic solid-sealed pole, which belongs to the technical field of vacuum circuit breakers. Background technique [0002] The existing indoor or outdoor solid-sealed poles are generally composed of upper outgoing wires, lower outgoing wires, vacuum interrupters, and epoxy resin shells, and the process mostly uses pressure gel or vacuum casting technology. Its disadvantages are that the curing time is long, the unit weight is heavy, and the epoxy resin waste is difficult to degrade, which cannot meet the requirements of environmental protection. [0003] In order to solve the above problems, thermoplastic environmental protection plastics can be used instead of epoxy resin as the solid-sealed pole insulation shell. Compared with epoxy resin solid-sealed poles, environmentally friendly plastics have a shorter curing time, 80% of the density of epoxy resin, and 50%...

AI Technical Summary

Problems solved by technology

However, in the process of injection molding, due to the high injection pressure, the huge injection impact force will deform the stainless steel layer on the end face of the vacuum interrupter, which will seriously crack the welding surface of the stainless steel and cause the vacuum interrupter to fail.

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