Sealing detection device

The utility model discloses a sealing detection device which comprises a fixing plate, four groups of supporting legs are installed at the lower end of the fixing plate, a water tank is arranged on the upper end face of the fixing plate, a supporting frame is fixedly installed at the upper end of the fixing plate, a first electric push rod is fixed to the upper end of the supporting frame through bolts, and a movable frame is arranged at the upper end of the water tank. The lower end of the movable frame is fixedly connected with a valve mounting frame. According to the sealing detection device, by arranging a piston type inflation structure, gas can be inflated into the water tank while the valve moves into the water tank, the gas pressure in the pressure relief valve can be accurately controlled, and after detection is completed, the pressure in the valve can be automatically relieved in the process of driving a transmission plate to ascend; compared with a traditional inflator pump, the detection device ha