发明名称 |
Recoil valve for oil or gas pumping - selectively couples pressurised air supply to piston-cylinder drive for valve closure |
摘要 |
<p>The valve has a pin rigidly attached to the valve closure plate and held in a pivot mounting in the valve housing. The pin is acted on by a pneumatic drive unit for moving the closure plate from the open to the closed position. Pref. the pneumatic drive unit has a supply reservoir for the pressurised air and a piston and cylinder device with a coupling rod between the end of the piston rod and the pin. The connection between the reservoir and the piston and cylinder has a control tap and a control valve operated by a control signal. The valve is used in a pumping circuit for natural gas or crude oil.</p> |
申请公布号 |
DE3013200(A1) |
申请公布日期 |
1981.10.08 |
申请号 |
DE19803013200 |
申请日期 |
1980.04.03 |
申请人 |
GEOSOURCE INC. |
发明人 |
A. SCHULLER,RONALD |
分类号 |
F16K15/18;(IPC1-7):16K15/18;16K31/12;17D1/14 |
主分类号 |
F16K15/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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