Gas charging device and gas charging method for gas chamber of GIS electric appliance

Abstract

The invention discloses a gas charging device and a gas charging method for a gas chamber of a GIS electric appliance. The gas charging device comprises an SF6 gas cylinder, a pressure reducing valve, an gas charging pipeline, a first gas recovery device, a four-way joint, a pressure gage, a first ball valve, a second ball valve, a third ball valve and a fourth ball valve, wherein a gas outlet of the SF6 gas cylinder is connected with a first end hole of the four-way joint through the pressure reducing valve, the first ball valve, the gas charging pipeline and the second ball valve in sequence, and a second end hole of the four-way joint is connected with the gas chamber of the GIS electric appliance through the third ball valve; a third end hole of the four-way joint is connected with the first gas recovery device through the fourth ball valve; the pressure gage is installed on a fourth end hole of the four-way joint. The gas charging device also comprises a second gas recovery device and a gas cylinder filled with air. When gas is charged to the gas chamber of the GIS electric appliance, the SF6 gas bottle is replaced by the gas cylinder filled with air, and the first gas recovery device is replaced by the second gas recovery device. The gas charging device can be used for solving the problems that SF6 gas in the gas chamber of the GIS contains excessive water, and the residual SF6 gas cannot be recovered.

Description

technical field [0001] The invention relates to an inflating device, in particular to an inflating device and an inflating method for an air chamber of a GIS electrical appliance. Background technique [0002] In recent years, with SF 6 GIS electrical equipment with gas as an insulating medium is widely used. Currently, GIS switches SF 6 The gas inflation method is to use SF 6 The gas cylinder is directly inflated to the GIS equipment, and each time the SF 6 When the gas is inflated, a certain amount of air will be brought in, and the air contains a certain amount of moisture, resulting in the SF in the air chamber of the GIS equipment 6 The gas contains too much water, and when there is too much water, there is a hazard. [0003] SF in the atmosphere 6 is a cause of global warming, therefore direct emission of SF into the atmosphere is strictly prohibited 6 gas, while the remaining SF in the inflation pipeline in the existing inflation method 6 Gas cannot be effectiv...

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Problems solved by technology

[0002] In recent years, with SF 6 GIS electrical equipment with gas as an insulating medium is widely used. Currently, GIS switches SF 6 The gas inflation method is to use SF 6 The gas cylinder is directly inflated to the GIS equipment, and each time the SF 6 When the gas is inflated, a certain amount of air will be brought in, and the air contains a certain amount of moisture, resulting in t

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