Anti-leakage sealing combined mechanism

The utility model belongs to an anti-leakage sealing combined mechanism, which is characterized in that a group of sealing rings B (4) are arranged in a group of annular grooves on the inner wall of a valve body (2), a valve clack (8) is clamped on a circular bead at the lower end of the valve body (2), the lower end of the valve clack (8) is clamped with a circular bead of a valve seat (6), a valve rod (1) is sleeved in the inner cavities of the valve body (2), the valve clack (8) and the valve seat (6), and a sealing ring C (5) is arranged on the surface of the lower part of the valve rod (1) corresponding to the valve seat (6). Three U-shaped notches are formed in the lower end of the valve rod (1) in the circumferential direction, and a boss (9) is formed between every two adjacent U-shaped notches. Cost is greatly saved, operation is easy, the service life of equipment is prolonged, training and special equipment are not needed, the equipment maintenance point is single, main parts do not need to be repl