Gas production device for sampling and detecting sulfur hexafluoride

The utility model discloses a gas sampling device for sampling and detecting sulfur hexafluoride, which belongs to the technical field of gas sampling and detecting devices and comprises a sampling tank and a vacuumizing device mounted on the sampling tank. The vacuumizing device comprises a shell with a cavity, an air inlet and an air outlet are formed in the shell, a piston assembly and a control mechanism are arranged in the cavity, the piston assembly comprises a connecting rod, push plates fixed to the two ends of the connecting rod and a rubber piston connected to the connecting rod in a sliding mode, and vent holes are correspondingly formed in the portions, close to the air outlet, of the push plate and the rubber piston. The push plate close to the air inlet can seal the vent hole in the rubber piston, the control mechanism is connected with the push plate close to the exhaust port, the air inlet is provided with the one-way air inlet mechanism connected with the collecting tank body, and the collect