39results about How to "Avoid tight fit" patented technology

The utility model provides a kind of high-pressure hydrogen bottle mouth sealing valve core and sealing valve, valve core includes: valve core body, the valve core body has oppositely arranged sealing surface and connecting surface;The sealing surface of the valve core body is provided with recess, the recess is provided with vulcanized rubber and vulcanized polytetrafluoroethylene gasket, the vulcanized rubber is arranged below the vulcanized polyethylene gasket, the vulcanized rubber and the vulcanized polyethylene gasket fill the recess.Upper end vulcanized polyethylene gasket effectively prevents hydrogen molecule penetration under high pressure state.Meanwhile can give product improves very good sealing effect, when being extruded under high pressure for a long time, also will not appear due to pressure and damaged problem.Recess inner lower part vulcanized rubber can provide very good rebound deformation to vulcanized polyethylene gasket even in low pressure process, prevent vulcanized polyethylene gasket and body sealing surface from not being close under low pressure state, improve sealing effect.