Gas tester with protection effect

The utility model discloses a gas testing machine with a protection effect, which comprises a gas testing machine, vertical plates are fixedly connected to the two sides of the inner wall of the gas testing machine, fixing blocks are fixedly connected to the outer sides of the vertical plates, sliding rods are fixedly connected to the inner walls of the fixing blocks, sliding sleeves are slidably connected to the surfaces of the sliding rods, and the sliding sleeves are fixedly connected to the outer sides of the vertical plates. The outer side of the sliding sleeve is movably connected with a connecting rod through a pin shaft, the outer side of the connecting rod is movably connected with a protective block through a pin shaft, the outer side of the vertical plate is fixedly connected with a spring damper, the spring damper is fixedly connected with the inner wall of the protective block, and the surface of the sliding rod is fixedly connected with a limiting block. And the limiting block is located on the