Pressure leaking stoppage structure suitable for low-pressure and large leakage point

The utility model discloses an under-pressure leaking stoppage structure suitable for a low-pressure and large leaking point, which is characterized in that a support plate is arranged in a leaking point pipeline or device, a pull rod is additionally arranged on the support plate, a clamping piece is arranged outside the leaking point pipeline or device, and a sealing gasket and a tightening pull rod are arranged on the outer surfaces of the clamping piece and the pipeline. Therefore, the sealing gasket between the clamping piece and the outer surface of the pipeline is clamped, and the purpose of leaking stoppage is achieved. The device is simple in structure and low in material cost; the sealing device is suitable for pipelines or other devices which bear low pressure and are made of metal or nonmetal with enough strength, and is used when tearing openings or large-area leakage points occur. Although the scheme is relatively harsh in application condition and relatively small in application range, the metho