公开(公告)号：US5348039A

公开(公告)日：1994-09-20

申请号：US169242

申请日：1993-12-20

申请人： Julian S. Taylor ,  C. Dean Couch

发明人： Julian S. Taylor ,  C. Dean Couch

IPC分类号： F16K17/14 ,  F16K17/40

CPC分类号： F16K17/14 ,  F16K17/406 ,  Y10T137/1782 ,  Y10T137/7781

摘要： A pressure relief valve for monitoring pressure in relatively large diameter conductors containing relatively high fluid pressure. The valve having housing openings of equal diameter with respect to the conductor and a flow passageway provided with different diameter coaxial sleeves slidably receiving interconnected dual diameter pistons. The smaller diameter piston forms a flow passageway stop while the larger diameter piston generates a pressure differential with respect to the smaller diameter piston for moving both pistons toward a flow passageway open position in which a piston rod guides the pistons in their axial movement with respect to the sleeves and collapses a pressure collapsible pin supported by a pin cage connected with the valve body in axial alignment with the piston rod for opening the valve passageway and releasing fluid pressure from the conductor. The larger diameter piston is apertured to admit downstream fluid pressure to its low pressure side. The piston rod diameter is selected to equal the difference in cross sectional area of the piston surfaces exposed to downstream fluid thereby completely balancing the pistons with respect to downstream fluid pressure.

摘要翻译： 一种用于在相对较大直径的导体中监测压力的减压阀，其中流体压力相对较高。 阀具有相对于导体具有相同直径的壳体开口，以及设置有不同直径的同轴套筒的流动通道，其可滑动地接收互连的双直径活塞。 较小直径的活塞形成流动通道止动件，而较大直径的活塞相对于较小直径的活塞产生压差，用于将两个活塞朝向流动通道打开位置移动，其中活塞杆相对于 袖子和塌陷由与阀体连接的销座支撑的压力可折叠销，其与活塞杆轴向对准，用于打开阀通道并从导体释放流体压力。 较大直径的活塞是有孔的，以允许下游流体压力到其低压侧。 选择活塞杆直径等于暴露于下游流体的活塞表面的横截面积差异，从而使活塞相对于下游流体压力完全平衡。