Rapid plugging device for precipitation well in building basement

The utility model provides a rapid plugging device for a precipitation well in a building basement. The rapid plugging device comprises a steel sleeve located at the top part of a precipitation well casing; the top part of the steel sleeve is provided with flanges; the top surfaces of the flanges are connected with a steel cover plate through bolts; a rubber seal washer is arranged between the steel cover plate and each flange; the outer wall of the steel sleeve is provided with a circle of waterstop ring; the lower part of the steel sleeve is provided with a steel bar base; the steel sleeve is embedded in the precipitation well casing; the steel bar base is seated at the top part of the precipitation well casing; the periphery of the steel bar base is provided with a concrete horizontal side; a suspension bottom die is arranged in the precipitation well casing below the steel sleeve; rapid hardening expansive concrete fills a gap between the steel cover plate and the suspension bottom die in the steel sleeve; a groove flush with the bottom surface of each flange is formed in a reinforced concrete bottom plate; a circle of expansive rubber sealing rod is pasted to the side wall of the groove; post-pouring concrete fills the interior of the groove. The rapid plugging device provided by the utility model is simple in structure, and convenient and rapid in operation, and is capable of rapidly and tightly plugging the precipitation well; as the rapid plugging device does not penetrates the bottom plate, the structural integrity can be ensured.