Airtightness detection device for triangular valve

The utility model relates to the field of detection devices of valves, in particular to an air tightness detection device of a triangular valve, which comprises a clamping cylinder, an inflation head, a valve seat and an automatic push-out mechanism, the clamping cylinder is vertically and inversely fixed on a supporting block, the inflation head is fixed at the front end of a cylinder shaft of the clamping cylinder, an inflation hole is arranged on the inflation head, and the valve seat is fixed on the clamping cylinder. Air pipes are fixed to the inflation head and the clamping air cylinder, a valve seat fixed to the horizontal plane of the operation table is arranged under the inflation head, the automatic push-out mechanism is installed on the vertical plane of the operation table and located between the valve seat and the inflation head in the vertical direction, and after a triangular valve is placed on the valve seat through a positioning ring, the triangular valve is pushed out. The inflation hole is