SF6 leakage plugging method of GIS (Gas Insulated Switchgear)

Abstract

The invention provides a SF6 (sulphur hexafluoride) leakage plugging method of a GIS (Gas lnsulated Switchgear). When the leakage plugging method is used to plug leakage at a weld joint of a pipe, the method includes the steps that a joint punch is used to hammer, rivet and punch the leakage site, and the joint punch, selected according to the shape of the leakage site, is a blunt-tip joint punch, a flat-tip joint punch or a concave-tip joint punch. When the leakage plugging method is used to plug leakage at the wall of a cylindrical pipe, the method includes the steps that a can-shaped container which can be attached on the outer side of the pipe is made; the container is connected with the wall of the pipe through an annular hoop; the container and the wall of the pipe are cushioned and sealed by a rubber mat; pores are punched on the wall of the container; and the pores are plugged by fixing the container on the wall of the pipe through the loop. The method disclosed by the invention is simple and the devices are convenient to make. With the method, the SF6 leakage sites can be quickly plugged within a limited time without affecting the operation of equipment, so operation risk is reduced. The method is suitable for use in emergency maintenance and air leakage maintenance of the GIS.

Description

technical field [0001] The invention proposes an equipment maintenance method in the electrical field, specifically a method for blocking SF6 gas leakage of GIS equipment. Background technique [0002] The leakage of SF6 gas in GIS equipment affects the normal operation. The areas that are usually prone to air leakage are: 1. Leakage of the pipe connection port, 2. Leakage of the welding joint of the connector, 3. Leakage of the connecting pipe, instrument and valve body, 4. Leakage of the cast aluminum alloy outer shell . [0003] At present, the solution to the leakage of SF6 gas on the pipeline wall of GIS equipment is to replace qualified pipelines. However, in this treatment method, because some of the pipelines leaking from the equipment may be in the middle of the equipment combination, most of the GIS equipment needs to be powered off. The working hours of this method are long, which affects the power supply reliability of the system. The power supply equipment is ...

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Problems solved by technology

[0003] At present, the solution to the leakage of SF6 gas on the pipeline wall of GIS equipment is to replace qualified pipelines. However, in this treatment method, because some of the pipelines leaking from the equipment may be in the middle of the equipment combination, most of the GIS equipment needs to be powered off. This method has long working hours, which affects the power supply reliability of the system. The power supply equipment is in a power outage state, which reduces the electricity sales. For some reason, it is impossible to deal with the power outage of defective equipment in a timely or short period of time.

[0004] At present, there is no relatively simple solution to the leakage of SF6 gas in the pipeline wall of GIS equipment. All the methods are to use the equipment to cut off the power and replace the leaking pipeline

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