Counterweight pressing end surface friction plate type sealing device

The utility model relates to a counterweight pressing end surface friction plate type sealing device. The device comprises a dynamic friction plate and a static friction platewhich are in friction connection, wherein one side of the static friction plate is next to a supporting plate, thesupporting plate and the static friction plate are tightly pressed on the dynamic friction plate by pressing devices, and each pressing device comprises a fixed hinge pin. The device is characterized in that a connecting sleeve is connected onto each fixed hinge pin in a circumferentially-rotating and axially-fixed manner, a connecting rod and a pressing rod are mounted on left and right sides of each connecting sleeve respectively, each connecting rod, each pressing rod and each connecting sleeve form a lever with each hinge pin serving as a pivot, one end, which is far away from each connecting sleeve, of each pressing rod is propped againstthesupporting plate, and one end, which is far away from each connecting sleeve, of