1results about How to "Eliminate thread clearance" patented technology

The utility model relates to the technical field of stop valve discloses a kind of stop valve to prevent valve flap rotation, comprising: valve body, valve flap and valve flap cover;Valve body is opened with the valve cavity for flowing medium, valve seat is installed in valve cavity, valve cover is installed on valve body;Valve stem is installed in valve cover;Valve stem is installed in valve cavity, valve flap is connected with valve stem, valve flap is driven to adhere or away from valve seat by valve stem to cut off or communicate valve cavity;One end of valve flap structure is fixedly connected with valve flap, other end is fixedly connected with valve stem.This structure prevents the unevenness of medium flow, drives valve flap to rotate, increases the wear of valve flap cover to valve stem.When high-speed or turbulent medium passes through valve, the risk that the traditional valve flap may rotate due to uneven impact of medium, leading to wear or sealing failure is eliminated.And by prohibiting rotation, significantly reduce the mechanical wear of valve stem, valve flap cover and valve flap, prolong the life of valve.