SF6 cryogenic recovery device based on Stirling cryocooler

The SF6 cryogenic recovery device comprises a machine box, the Stirling cryocooler, a vacuum tank, a gas storage tank and a gas inlet and outlet pipeline, the Stirling cryocooler is arranged in the machine box, the vacuum tank is arranged on the upper portion of the machine box, and the gas storage tank is installed in the vacuum tank through a supporting limiting structure; a cold head of the Stirling cryocooler extends into the vacuum tank and is connected with the bottom of the air storage tank through a cold guide block, and an air inlet and outlet pipe is arranged on the air storage tank and extends out of the vacuum tank upwards to be connected with an air inlet and outlet pipeline. The Stirling cryogenic low-pressure technology is reasonably utilized, the vacuum heat preservation technology is adopted, compared with the prior art, the refrigerating efficiency is high, the situation that the air storage tank makes contact with air to cause cooling capacity loss can be prevented, the refrigerating effect