Sealing joint for gas insulation switch cabinet

Abstract

The invention discloses a sealing joint for a gas insulation switch cabinet. The sealing joint comprises an epoxy resin sealing body. The epoxy resin sealing body is integrally fixed at an opening ofthe gas insulation switch cabinet. A metal insert penetrates through the epoxy resin sealing body. A first internal thread groove is formed in one end, close to the opening of the gas insulation switch cabinet, of the metal insert, and a second internal thread groove is formed in the other end of the metal insert. The first internal thread groove is connected with a secondary control loop of the gas insulation switch cabinet. The secondary control loop is connected with a display device. The second internal thread groove is connected with a high-voltage current transformer in the gas insulation switch cabinet. According to the invention, the sealing joint can replace an aviation plug; through a mature and reliable epoxy resin pouring technology, the sealing defect of the joint body is avoided; threads are arranged at the two ends of the insert; a secondary signal line of the high-voltage current transformer does not need to be welded with a contact pin hole of an aviation socket manually; sealing damage caused by welding is avoided; and the sealing reliability of switch equipment is greatly improved.

Description

technical field [0001] The invention relates to the technical field of switchgear, in particular to a sealed joint for gas-insulated switchgear. Background technique [0002] Gas-insulated switchgear is compact in structure and reliable in operation, and is widely used in medium and high voltage transmission and distribution networks for power distribution and line protection. Typical solutions for switchgear include cable entry and exit cabinets, metering cabinets, sectional isolation cabinets, sectional circuit breaker cabinets, and isolation cabinets. Busbar lift cabinet, etc. Among them, high-voltage current transformers need to be installed in the sealed air boxes of the cable inlet and outlet cabinets, metering cabinets, and sectional isolation cabinets, and transition joints are used to lead the secondary signals of the current transformers from the sealed air box to the secondary control circuit of the switch cabinet. Protection measurement effect to the line. [...

AI Technical Summary

Problems solved by technology

However, the shortcomings of imported aviation plugs such as long delivery time, high price, and inability to meet 100% sealing reliability of all products still exist.

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