Lifting type plug -valve

The utility model discloses a lifting type plug -valve. It includes valve body, cock body, lower cover, valve rod, valve gap, gland, underdrive cover, stopper, transfer line, hand wheel, round nut, bearing cap, bearing, support shell body, uide bushing, direction roller, goes up transmission cover, preceding seating ring, back seating ring, spring holder, disc spring, valve seat insert etc. The utility model is suitable for an on high temperature resistant, high -pressure, the wear -resisting and resistant pipeline that special purpose such as erodees, especially have on the medium pipe of granule nature. The utility model discloses the promotion that realizes the cock body can realize the coherent function of " promoting - - - rotation - - - lower floodgate " in once continuous rotation with the rotation, the conversion of motion is realized to the swivel nut screw in the structure when linear motion converts rotary motion to. And simultaneously, the utility model provides a disk seat adopts a split type scalable valve holder structure, can realize preventing the function of medium entering valve pocket when sealed vice throwing off.