Wall bushing of 66kV to 500kV voltage grade

Abstract

A wall bushing of a 66kV to 500kV voltage grade relates to a power supply access apparatus which can work under a 700 degree centigrade environment. The wall bushing of the 66kV to 500kV voltage grade comprises a connection seat and a heat dissipation system connected to the connection seat. A hollowed-out metal bellows which accommodates an electrode is arranged in a conducting cavity of the connection seat. In the structure, heat received by the wall bushing in a thermal insulating wall can be dissipated through circulation flowing of a cooling medium in a cooling loop. Simultaneously, through using an insulation characteristic of the cooling medium, a length acquired through high-voltage high temperature resistance wall bushing connection is shortened and insulating strength is increased. By using the high-temperature-resistance high-voltage wall bushing, industrialized production can be realized, and inconvenience brought by on-site spare part installation is overcome. The wall bushing can stably work under a high temperature environment of a 700 degree centigrade and possesses advantages that the design is reasonable and the wall bushing is safe and reliable.

Description

technical field [0001] The invention relates to a power access device capable of working in an environment of 700 degrees Celsius, in particular to a wall-piercing bushing with a voltage level of 66kV to 500kV. Background technique [0002] Generally, the working temperature range of high-voltage wall-piercing bushings with a voltage level of 66kV to 500kV in the market is minus 40 degrees Celsius to minus 50 degrees Celsius. The publication number is XXX, and the name is "High-voltage high-temperature resistant wall-piercing bushing". proposed a power connection that can meet the equipment's 66kV to 500kV voltage level under the operating temperature of 200°C to 700°C, but it has the disadvantages of large volume, heavy weight, and on-site installation of loose parts. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a wall-piercing bushing with a voltage level of 66kV to 500kV, which can en...

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Problems solved by technology

[0002] Generally, the working temperature range of high-voltage wall-piercing bushings with a voltage level of 66kV to 500kV in the market is minus 40 degrees Celsius to minus 50 degrees Celsius. The publication number is XXX, and the name is "High-voltage high-temperature resistant wall-piercing bushing". proposed a power supply connection that can meet the equipment's 66kV to 500kV voltage level under the working temperature of 200°C to 700°C, but it has the disadvantages of large volume, heavy weight, and on-site installation of loose parts.

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