公开(公告)号：US3896840A

公开(公告)日：1975-07-29

申请号：US46584474

申请日：1974-05-01

申请人： ANDERSSON SVEN E

发明人： ANDERSSON SVEN E

IPC分类号： F16K31/38 ,  F16K1/12 ,  F16K31/42

CPC分类号： F16K31/42 ,  F16K1/126 ,  Y10T137/3367 ,  Y10T137/86686

摘要： A pilot valve controlled fluid pressure actuated flow control valve is disclosed which includes a plunger in the flow passageway through the main valve. One end of the plunger defines a piston which is disposed in a piston chamber, and the other end of the plunger defines a valve element displacable into and out of engagement with a valve seat in the passageway. A pilot valve controls the flow of upstream fluid into and from the piston chamber to respectively close and open the main valve passageway. The pilot valve includes a pair of valve elements reciprocable together between first and second positions. In the first position, one of the valve elements closes the passage for delivery of upstream fluid to the piston chamber and the other valve opens a passageway to release upstream fluid from the piston chamber. In the second position, the one valve element opens the passageway for directing upstream fluid to the piston chamber and the other closes the passageway for release of upstream fluid from the piston chamber. Each of the pilot valve elements is biased in its closed position by the pressure of upstream fluid acting thereagainst.

摘要翻译： 公开了一种先导阀控制流体压力致动流量控制阀，其包括通过主阀的流动通道中的柱塞。 柱塞的一端限定了设置在活塞室中的活塞，并且柱塞的另一端限定了可移动地进入和离开通道中的阀座的阀元件的阀元件。 先导阀控制进入活塞室和从活塞室流出的上游流体，以分别关闭和打开主阀通道。 先导阀包括一对可在第一和第二位置之间往复运动的阀元件。 在第一位置中，一个阀元件关闭用于将上游流体输送到活塞室的通道，另一个阀打开通道以从活塞室释放上游流体。 在第二位置，一个阀元件打开用于将上游流体引导到活塞室的通道，而另一个阀元件封闭通道以从活塞室释放上游流体。 每个先导阀元件通过在其上作用的上游流体的压力而偏置在其关闭位置。

公开(公告)号：US3583440A

公开(公告)日：1971-06-08

申请号：US3583440D

申请日：1968-11-26

申请人： ANDERSSON SVEN E

发明人： ANDERSSON SVEN E

IPC分类号： F16K31/122 ,  F16K31/12 ,  F16K21/04

CPC分类号： F16K31/1223 ,  Y10T137/7835 ,  Y10T137/7836 ,  Y10T137/86413

摘要： A control valve for use in a pipe line conveying any pressure media such as gas, water, oil, etc., operating by differential pressure established in the valve. The control valve embodies a casing having an inlet and an outlet for the media to flow therethrough, and provided within the casing is a cylinder chamber having a movable piston therein. A piston rod extends from one side of the piston and carries at its free end a valve element arranged to seat in the casing outlet to block the flow of the media therethrough. The cylinder provides a chamber on the other side of the piston filled with air under atmospheric pressure. An air inlet and discharge valved conduit is connected to the cylinder chamber adjacent its end wall opposite the piston, the valved conduit including an adjustable valve settable to meter the inlet of air at a predetermined rate into the chamber and a spring pressed valve that is opened to discharge the air from the cylinder chamber when the piston moves therein to expel the air in the chamber. The difference in surface area between the piston and valve carried by the piston rod establishes a differential pressure such that when the pressure in the media exceeds a predetermined limit the differential pressure will act on the piston to move the same inwardly into the cylinder chamber to expel the air therefrom, thus opening the valve the setting of the adjustable valve in the air inlet and discharge valved conduit controls the time for the air to flow into the cylinder chamber and thus to control the outward movement of the piston and the closing of the control valve. This operation is entirely automatic. In lieu of the use of the air inlet and discharge valved conduit the exit and admission of air to the air cylinder chamber of the control valve may be controlled by a manually operated valve or by solenoid operated valves in an air line remote from the control valve.