Gas alarm calibration device

The utility model discloses a gas alarm calibration device, which comprises a gas alarm body, a mounting pipe, a gas flow meter, a cover body, a rotating ring, a bottom shell, a mounting groove, an arc-shaped baffle plate and a linkage structure, and is characterized in that the mounting pipe is arranged at the lower end of the outer part of the gas alarm body, and the gas flow meter is arranged in the mounting pipe; a cover body is arranged on the lower side of the outer portion of the mounting pipe, a rotating ring is arranged on the lower side of the outer portion of the cover body, a bottom shell is arranged on the lower side of the rotating ring, a mounting groove is formed in the upper side of the bottom shell, a plurality of evenly-distributed arc-shaped blocking pieces are arranged in the mounting groove, and a linkage structure is arranged between the rotating ring and the arc-shaped blocking pieces. Compared with the prior art, the utility model has the advantages that the air inflow is convenient t