Novel check-valve type sleeve-pipe well-plugging device

The utility model relates to a novel check-valve type sleeve-pipe well-plugging device of a long-closed well mouth. The utility model adopts the technical scheme that: the novel check-valve type sleeve-pipe well-plugging device comprises a pipe body, wherein the pipe body is divided into two through chambers, a check valve is arranged at the axis position in a lower chamber, the top end of the check valve is in through connection with an upper air hole between the two chambers, a spring is arranged in the check valve, a sphere is arranged at the upper part of the spring, a lower air hole is arranged at the bottom of the check valve, the diameter of the sphere is larger than that of the upper air hole, an internal thread is arranged at the periphery of the bottom of the lower chamber, and an emptying plug is arranged at the top of an upper chamber. The utility model has the beneficial effects that: the destruction of a long-closed well or an abandoned well by the outside is effectively avoided, and the industr