发明名称 |
A SERVO OPERATED STOP VALVE INSTALLATION |
摘要 |
A subterranean stop valve in a district heating system is laid out for servocontrolled operation from a nearby walkway cabinet, by hydraulic actuation of a double acting free piston block (8), which is displaceable with high power just as much as required for a full change-over of the valve (2). Just prior to the full change-over being reached it is automatically arranged that at the hydraulic return end of the piston the return flow (28) is shifted to now be forced (at 42) into a remote indicator (48), whereby a slide body (54) in the latter is changed over, affected by a high force immediately at the end of the full valve change-over. Hereby a robust and long-time durable change-over and indicator system is achievable. |
申请公布号 |
WO9423231(A1) |
申请公布日期 |
1994.10.13 |
申请号 |
WO1994DK00144 |
申请日期 |
1994.04.07 |
申请人 |
ABB DISTRICT HEATING;PEDERSEN, HANS, NOERGAARD |
发明人 |
PEDERSEN, HANS, NOERGAARD |
分类号 |
F16K31/163;F16K31/54;(IPC1-7):F16K31/163 |
主分类号 |
F16K31/163 |
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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