Multi-excitation sealing mechanism for casing head and hanger

The utility model discloses a multi-excitation sealing mechanism for a multi-excitation casing head and a hanger in the technical field of hanger sealing, and the multi-excitation sealing mechanism comprises a pipe column, a pipe body and a ring groove arranged on the outer wall of the pipe body; the excitation component comprises a casing head arranged outside the pipe body, a self-weight excitation assembly arranged in the casing head and a mechanical excitation assembly arranged on the casing head, the mechanical excitation assembly is arranged above the self-weight excitation assembly, and when the self weight of the pipe body is enough to achieve sealing, the mechanical excitation assembly does not need to be used; when sealing cannot be achieved only by means of the self weight of a small-load pipe column, the inner hexagon bolt is screwed to enable the arc-shaped pressing plate to extrude the sealing ring on the supporting ring, so that the secondary sealing effect is achieved, the jackscrew is screwed