公开(公告)号：US20110297252A1

公开(公告)日：2011-12-08

申请号：US12664150

申请日：2008-06-13

Applicant: Richard James Hurley ,  Mark Nicholas Lock ,  John Henry May

Inventor： Richard James Hurley ,  Mark Nicholas Lock ,  John Henry May

IPC: F16K31/12

CPC classification number: G05D16/163 ,  Y10T137/7762

Abstract: An improved pilot valve assembly (14) for hydraulically controlling a pressure reducing valve (12) to maintain and further vary the outlet pressure (P2) of the pressure reducing valve (12) in response to increased flow (f) through the valve (12). The pilot valve assembly (14) comprising first and second movable valve members (100,102). The first and second moveable members (100,102) being acted on by a velocity head pressure sensed by a downstream Pitot tube (90) and a downstream outlet pressure (P2) in a balanced arrangement such that they move in response to both the velocity head and downstream pressure (P2) to open and close the pilot valve (14) and so main valve (12) to both maintain and vary the outlet pressure (P2).

Abstract translation: 一种用于液压控制减压阀（12）的改进的先导阀组件（14），以响应于通过阀（12）的增加的流量（f）来维持和进一步改变减压阀（12）的出口压力（P2） ）。 导阀组件（14）包括第一和第二可动阀构件（100,102）。 第一和第二可移动构件（100,102）由平衡布置的下游皮托管（90）和下游出口压力（P2）感测的速度头压力作用，使得它们响应于速度头和 下游压力（P2），以打开和关闭导阀（14），使主阀（12）保持并改变出口压力（P2）。