公开(公告)号：US4174728A

公开(公告)日：1979-11-20

申请号：US851330

申请日：1977-11-14

申请人： George B. Usnick ,  Gene T. Ward ,  Henry O. Blair ,  James W. Roberts ,  Terry N. Warner

发明人： George B. Usnick ,  Gene T. Ward ,  Henry O. Blair ,  James W. Roberts ,  Terry N. Warner

IPC分类号： F16K3/20

CPC分类号： F16K3/205 ,  Y10T137/4259

摘要： This invention is a novel valve of the slidable-gate type. The valve is designed especially for long-term use with highly abrasive slurries. The sealing surfaces of the gate are shielded by the valve seats when the valve is fully open or closed, and the gate-to-seat clearance is swept with an inflowing purge gas while the gate is in transit.A preferred form of the valve includes an annular valve body containing an annular seat assembly defining a flow channel. The seat assembly comprises a first seat ring which is slidably and sealably mounted in the body, and a second seat ring which is tightly fitted in the body. These rings cooperatively define an annular gap which, together with passages in the valve body, forms a guideway extending normal to the channel. A plate-type gate is mounted for reciprocation in the guideway between positions where a portion of the plate closes the channel and where a circular aperture in the gate is in register with the channel.The valve casing includes opposed chambers which extend outwardly from the body along the axis of the guideway to accommodate the end portions of the gate. The chambers are sealed from atmosphere; when the gate is in transit, purge gas is admitted to the chambers and flows inwardly through the gate-to-seat-ring, clearance, minimizing buildup of process solids therein. A shaft reciprocated by an external actuator extends into one of the sealed chambers through a shaft seal and is coupled to an end of the gate. Means are provided for adjusting the clearance between the first seat ring and the gate while the valve is in service.

摘要翻译： 本发明是一种新型的可滑门式阀。 阀门专门设计用于长期使用高磨蚀性浆料。 当阀门完全打开或关闭时，门的密封表面被阀座屏蔽，并且门在运输过程中通过流入的吹扫气体扫过门到座的间隙。 阀的优选形式包括环形阀体，其包含限定流动通道的环形座组件。 座椅组件包括可滑动和可密封地安装在主体中的第一座环，以及紧密地装配在身体中的第二座环。 这些环协调地限定一个环形间隙，其与阀体中的通道一起形成垂直于通道延伸的导轨。 板式门被安装用于在导轨中在板的一部分关闭通道的位置和门的圆形孔与通道对准的位置之间往复运动。 阀壳体包括相对的腔室，其沿着导轨的轴线从主体向外延伸以容纳门的端部。 室内气氛密封; 当闸门处于运输状态时，吹扫气体被允许进入腔室并向内流过门到座环，间隙，从而最小化其中过程固体的累积。 由外部致动器往复运动的轴通过轴密封件延伸到一个密封室中，并且连接到门的端部。 提供了用于在阀正在使用时调节第一阀座环和阀门之间的间隙的装置。