Air sonic path distance adjusting device

The utility model relates to the technical field of calibration devices, in particular to an air sonic path distance adjusting device which comprises a clamping mechanism installed on a guide rail in a sliding mode. The clamping mechanism comprises a mounting frame, a plurality of threaded holes are formed in the mounting frame, corresponding bolts are in threaded connection with the interiors of the threaded holes, the ends, penetrating into the mounting frame, of the bolts are connected with arc-shaped clamping plates of the same shape, and the arc-shaped clamping plates are used for clamping the transducer; a connecting rod is arranged at the lower end of the mounting frame, and the other end of the connecting rod is slidably embedded in the guide rail; a vernier caliper is arranged above the guide rail, and a moving part is fixedly installed on the connecting rod and movably connected with the vernier caliper. The clamping mechanism comprises a fixed clamping mechanism and a movable clamping mechanism, th