Mechanical lifting type retort cover

The mechanical lifting type retort cover comprises a retort cover body, a walking frame, a driving cylinder, a connecting rod, a supporting plate and a sealing ring, the driving cylinder is fixed below the walking frame, the supporting plate is horizontally arranged above the retort cover body, and the driving end of the driving cylinder is fixedly connected with the middle of the upper surface of the supporting plate; the supporting plate and the retort cover body are connected through at least three vertically-arranged connecting rods, the connecting rods are arranged in an array mode in the circumferential direction of the retort cover body, and a sealing ring is fixedly connected to the edge of an opening in the lower end of the retort cover body. According to the mechanical lifting type retort cover, the damage of the driving end of the driving cylinder to the retort cover body is avoided to a certain extent, the driving cylinder drives the retort cover body to ascend and descend, the covering pressure b