Air-proof basement valve side leakage detection device

The utility model discloses a side leakage detection device for an air-proof basement valve. COMPRISING A CLOSED OVERPRESSURE CHAMBER, the closed overpressure chamber is of a cylindrical structure with an opening in the center of the top and a sealed bottom. An air inlet and an air outlet are formed in the circumferential side wall of the closed overpressure chamber; the air inlet is connected with a flow meter through an air pipe; the flow meter is connected with a compressed air source through an air pipe; a regulating valve is arranged on the pipeline between the flow meter and the compressed air source; the air outlet is connected with a micromanometer through an air pipe, the upper end face of the closed overpressure chamber is fixedly connected with a detected piece, the detected piece is communicated with the closed overpressure chamber through a top center opening, and the joint of the detected piece and the closed overpressure chamber is kept sealed. The air-proof basement valve side leakage detectio