This utility model discloses a gas
recovery device, relating to the field of gas
recovery technology. It includes a housing, inside which a compressor pump, a
recovery tank, and a
nitrogen tank are fixedly installed. An L-shaped three-way
ball valve is located on one side of the housing. One port of the L-shaped three-way
ball valve is fixedly connected to an extraction
pipe, and the other two ports are fixedly connected to connecting pipes. One connecting
pipe connects to the
nitrogen tank, and the other connecting
pipe connects to the recovery tank via the compressor pump. A plug is fixedly installed at the other end of the extraction pipe. This gas recovery device, through the design of the L-shaped three-way
ball valve, can flexibly switch between extraction and
nitrogen injection pathways. By injecting nitrogen from the nitrogen tank into the chamber to be recovered, creating disturbance, and cooperating with multiple extraction cycles by the compressor pump, residual
sulfur hexafluoride gas in narrow cavities and dead corners can be effectively removed, thereby significantly improving the
sulfur hexafluoride recovery rate, avoiding the risk of gas overflow when the chamber is opened, and significantly reducing the health hazards to workers and the risk of
air pollution.