Three-way connecting pipe SF6 gas testing device with pressure stabilizing valves

The utility model relates to a gas testing technology, in particular to a three-way connecting pipe SF6 gas testing device with pressure stabilizing valves. The output end of a steel oxygen cylinder is connected with the input end of a three-way connecting pipe; and the three-way connecting pipe is respectively connected with the input end of a first gas mixer and the input end of a second gas mixer, and the output end of the first gas mixer and the output end of the second gas mixer are respectively connected with a first contamination cylinder and a second contamination cylinder. By adding two pressure stabilizing valves and one three-way connecting pipe on a pressure gauge at the outlet of the oxygen cylinder, the device shunts the oxygen and simultaneously tests with two cylinders of SF6 gas. When the sample size of SF6 is large, the testing area is saved, the safety of a lab is improved, the testing time is shortened, the testing cost is saved, and the labor intensity of a tester is reduced. The three-way connecting pipe SF6 gas testing device with the pressure stabilizing valves is applicable to the gas testing to one cylinder of oxygen mixed with a plurality of cylinders of testing gases.