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    • 5. 发明授权
    • High pressure packless metal diaphragm valve
    • 高压无包金属隔膜阀
    • US4354666A
    • 1982-10-19
    • US158888
    • 1980-06-12
    • Joseph P. McHale
    • Joseph P. McHale
    • F16K41/12F16K31/50
    • F16K41/12
    • A valve body has a chamber with a lower portion provided with inlet and outlet openings and an upper portion that includes a diaphragm seat having a surface with a presclected degree of roughness. An assembly of individual flexible metallic diaphragms is positioned in a stacked arrangement a graphite gasket positioned on the roughened diaphragm seat. A bonnet bolted to the valve body applies a downward bearing force upon the outer annular edge of the diaphragm assembly to secure the diaphragm assembly and gasket in sealing relation with the valve body to seal the chamber upper portion from the chamber lower portion. A yoke member is secured to the valve body in surrounding, spaced relation with the bonnet. A valve member has a disc portion arranged to move into and out of abutting relation with a valve seat of the valve body to control the flow of fluid under substantial pressure through the chamber. The upper end of the valve member abuts the lower surface of the diaphragm assembly, and the end of a valve stem abuts the top surface of the diaphragm assembly oppositely of the valve member. An upper end of the valve stem is nonrotatably connected to a bushing which is axially fixed for rotation within the yoke member and is removably connected by an adapter to an actuator that transmits rotation to the bushing. Rotation of the bushing axially advances the valve stem without rotation in the yoke member and the bonnet to raise and lower the valve stem and the valve member to open and close the valve. Upward thrust exerted upon the valve stem when the valve is closed under full line pressure is transmitted from the valve stem through the yoke member to the valve body so that the upward thrust is not applied to the bonnet and the bearing force exerted by the bonnet upon the diaphragm assembly is not reduced, thus preventing leakage around the diaphragm assembly.
    • 阀体具有具有设置有入口和出口开口的下部的室,以及包括具有倾斜度的表面的隔膜座的上部。 单个柔性金属隔膜的组件被布置成堆叠布置的位于粗糙隔膜座上的石墨垫片。 螺栓连接到阀体上的阀盖向隔膜组件的外环形边缘施加向下的支承力,以将隔膜组件和垫圈固定在与阀体密封的关系中,以将腔室上部与腔室下部密封。 轭构件以与发动机罩相关的间隔关系固定到阀体上。 阀构件具有盘部,该盘部布置成与阀体的阀座移动抵接关系,以控制通过腔室的实质压力下的流体流动。 阀构件的上端邻接隔膜组件的下表面,并且阀杆的端部与隔膜组件的与阀构件相对的顶表面邻接。 阀杆的上端不可旋转地连接到衬套,轴衬固定以便在轭构件内旋转,并通过适配器可拆卸地连接到将旋转传递到衬套的致动器。 衬套的旋转轴向地推进阀杆,而不会在轭构件和阀盖中旋转,以升高和降低阀杆和阀构件以打开和关闭阀。 当阀门在全线压力下关闭时,施加在阀杆上的向上推力从阀杆通过轭构件传递到阀体,使得向上的推力不会施加到发动机罩上,并且由阀盖施加的支承力 隔膜组件不会减少,从而防止膜片组件周围的泄漏。