System for pumping and inflating SF6 for gas insulated switchgear

Abstract

The invention discloses a system for pumping and inflating SF6 for a gas insulated switchgear (GIS), comprising an SF6 recovery device, a vacuum pump, an SF6 storage device, a vacuum gauge and a connection pipeline, wherein the connection pipeline is combination pipes with four pipes which are communicated with each other, a moveable connector matched to a connection device is respectively on each of four ports of the connection pipeline, any pipe of the combination pipes can individually be opened or closed, three ports of the combination pipes are respectively connected with a GIS main body, the SF6 recovery device and the vacuum pump, and the other port is respectively connected with the vacuum gauge and the SF6 storage device in order. The system for pumping and inflating SF6 can greatly save time for pumping and inflating SF6 for the GIS, and has good internal pressure endurance and sealing reliability. In addition, the system for pumping and inflating SF6 has versatility.

Description

technical field [0001] The invention relates to a SF for GIS 6 Gas is pumped and charged into the system. Background technique [0002] GIS (GAS INSULATED SWITCHGEAR) is the abbreviation of gas insulated fully enclosed combined electrical appliances. It is composed of circuit breaker, isolating switch, grounding switch, transformer, lightning arrester, bus bar, connector and outlet terminal, etc. These parts are all enclosed in a metal grounding shell, and the inside is filled with a certain pressure of SF 6 Insulating gas, also known as SF 6 Fully enclosed combined electrical appliances. [0003] GIS equipment has been widely used all over the world since it was put into practical use in the 1960s. GIS has a compact structure, small footprint, high reliability, and strong security, and is widely used in high-voltage, ultra-high voltage, and ultra-high voltage fields; but GIS also has SF 6 Gas leakage, external moisture infiltration, insulation aging and other problems,...

AI Technical Summary

Problems solved by technology

Need to extract and charge SF before and after GIS troubleshooting 6 Gas, while extracting and charging SF 6 The gas time is sometimes longer than the maintenance time, which seriously affects the electricity consumption of residents

[0004] Currently drawing and charging SF 6 gas SF 6 Recovery unit, vacuum pump, vacuum gauge, SF 6 The storage device is directly connected to the GIS through ordinary pipelines, and the SF 6 Gas→vacuumizing→vacuum measuring→filling SF 6 In the process of gas, it is necessary to frequently switch the connected devices, which wastes a lot of time; in addition, due to the high requirements for sealing in the working process, each switching device needs to be re-sealed, which further increases the time for switching devices. And the probability of poor sealing is high

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