Gas mixing device and gas mixing method

Abstract

The invention discloses a gas mixing device and a gas mixing method. The gas mixing device comprises a gas guide pipe used for connecting a gas outlet and a gas inlet of a switch equipment gas chamberstructure, wherein the switch equipment gas chamber structure is provided with a plurality of gas ports, and the plurality of gas ports comprise the gas outlet and the gas inlet; a pump arranged on the gas guide pipe and used for driving gas in the gas guide pipe to flow towards the gas outlet end of the gas guide pipe along the gas inlet end of the gas guide pipe, wherein the gas inlet end of the gas guide pipe is a connecting end for connecting the gas guide pipe with the gas outlet, and the gas outlet end of the gas guide pipe is a connecting end for connecting the gas guide pipe with thegas inlet; a joint group arranged on the gas guide pipe and used for inflating and deflating the switch equipment gas chamber structure through the gas guide pipe; and a gas component sensor arrangedon the gas guide pipe and used for detecting all gas components of the mixed gas in the gas guide pipe. The gas mixing device provided by the invention effectively ensures the mixing effect.

Description

technical field [0001] The invention relates to the technical field of switchgear, in particular to a gas mixing device and a gas mixing method. Background technique [0002] Environmentally friendly gas as widely used SF in switchgear 6 Alternative media have received increasing attention in recent years. Environmentally friendly gases are mostly a mixture of basic gases and common gases. The basic gases are generally macromolecular substances, and common gases are small molecular substances. Since the mixed gas will be filled into the switchgear after the switchgear is installed in place, and the gas chamber of the equipment has a large volume, stratification may occur. The invention provides a device and method for rapidly mixing gas in a closed space, which can realize rapid and uniform mixing of the gas in the gas chamber of the switchgear. [0003] SF 6 As an excellent insulation and arc extinguishing medium, it is widely used in switchgear. However, as required b...

AI Technical Summary

Problems solved by technology

Since the mixed gas will be filled into the switchgear after the switchgear is installed in place, and the gas chamber of the equipment has a large volume, the diffusion process of the large gas in the small molecule gas is greatly affected by gravity, and the time required to form a stable mixed state is relatively short. long

When the base gas is firstly filled and then the buffer gas is used, stratification will occur, which will cause the insulation strength of the equipment to fail to meet the design requirements after the mixed gas is filled, and the density relay will also display deviations, which may endanger the switchgear when it is put into operation. Safe and stable operation of power grid

At the same time, if the high-voltage switchgear uses a premixing device when filling the mixed gas, the cost is high, the operation is complicated, the filling process is time-consuming, and the state of the premixed gas entering the gas chamber cannot be controlled.

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