Mechanical sealing device for large-shaft-diameter and large-shaft-channeling reaction kettle

The utility model discloses a reaction kettle mechanical sealing device for large shaft diameter and large shaft channeling, the reaction kettle comprises a gland A, a gland B, a static ring, a movable ring, a push ring, a positioning block and a movable ring seat, the reaction kettle mechanical sealing device comprises a guide pin, a fragment well and an adjusting screw, the guide pin is fixed on the top of the push ring, a spring is sleeved on the guide pin, and the fragment well is fixed on the guide pin. A fragment well is fixed to the inner ring of the gland A. A threaded hole is formed in the top of the positioning block, an adjusting screw is in threaded connection with the interior of the threaded hole, and in the process that the adjusting screw is in threaded connection with the threaded hole, the top of the adjusting screw presses the movable ring base to move downwards. Water is injected into an annular groove between the movable ring and the gland B so that a lubricating end face can be formed be