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1. 发明授权

US3998426A Clamshell-type hydraulic flow control gate 失效
标题翻译：蛤壳型液压流量控制门
公开(公告)号：US3998426A
公开(公告)日：1976-12-21
申请号：US594824
申请日：1975-07-10
申请人： Thomas John Isbester
发明人： Thomas John Isbester
IPC分类号： E02B8/04 , F16K3/22 , F16K3/00
CPC分类号： F16K3/22 , E02B8/04
摘要： An apparatus for controlling fluid discharge through an outlet of a conduit comprises a clamshell-type gate including first and second opposed gate members pivotally mounted to the exterior of the conduit. The gate members are oppositely rotatable through an arc of approximately 90.degree. between an open position and a closed position just downstream of the outlet. In the closed position, the gate members are closed together along a lip seal at the center of the conduit. A collar seal, mounted to the conduit, is urged against the gate members to block peripheral fluid discharge from the outlet. When the gate is fully or partially open, a portion of the outlet extends downstream of the lip seal to minimize "fan out" of the discharge. In the fully open position, the gate members are open symmetrically beyond the diameter of the outlet for unrestricted fluid discharge through the outlet. The gate members are pivotally attached to trunnion members at each side of the conduit through support arm plates. In one embodiment, the support plates contain elongated slots approximately perpendicular to the gate members that act as cam surfaces for controlling rotation of the gate members. Rotation of the gate members is caused by longitudinal movement of control shafts, guided by the trunnion members. The shafts are connected to follower pins that ride the elongated slots in the support arm plates to provide the camming action. This arrangement produces a closing torque that progressively increases during closure of the gate members. In another embodiment, the support arm plates are linked to opposite legs of yoke members on each side of the conduit. The gate members are rotated by longitudinal movement of the yoke members.
摘要翻译：用于控制通过导管的出口的流体排放的装置包括蛤壳型门，其包括枢转地安装到导管外部的第一和第二相对的门构件。门构件能够在出口下游的打开位置和关闭位置之间通过大约90°的弧度相反地旋转。在关闭位置，闸门构件沿导管中心的唇形密封封闭在一起。安装到导管上的套环密封件被推靠在门构件上以阻止外围流体从出口排出。当门完全或部分打开时，出口的一部分延伸到唇形密封件的下游，以最大限度地减少排放的“风扇”。在完全打开位置，门构件对称地开口超过出口的直径，用于通过出口不受限制的流体排放。门构件通过支撑臂板枢转地附接到导管的每一侧的耳轴构件。在一个实施例中，支撑板包含大致垂直于门构件的细长狭槽，其用作控制门构件旋转的凸轮表面。门构件的旋转是由牵引构件引导的控制轴的纵向运动引起的。轴连接到跟随在支撑臂板上的细长槽的从动销以提供凸轮动作。这种布置产生在门构件闭合期间逐渐增加的闭合扭矩。在另一个实施例中，支撑臂板连接到导管的每侧上的轭构件的相对的腿。门构件通过轭构件的纵向运动而旋转。

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