Quad-redundant Hydraulic Trip System
AssigneeInvensys Systems, Inc.
InventorsJames L. Jacoby, W. Brian Piercy
Life of this patent
Estimating the term…
Abstract
A voting solenoid system and method is configured to selectively apply fluid pressure above and below a threshold value, to a fluid node. The voting solenoid arrangement includes first and second solenoid valve pairs, each pair including first and second solenoid valves. The valve pairs are located in parallel fluid communication with a fluid pressure source, each of the first and second solenoid valves being alternately actuatable between energized and de-energized states. The solenoid arrangement is configured so that a change of state of the first and second valves of either of the valve pairs alternately applies fluid pressure above and below the threshold value, to the fluid node.
Claims19
A voting solenoid arrangement configured to selectively apply fluid pressure above and below a threshold value, to a fluid node, said voting solenoid arrangement comprising:
- first and second solenoid valve pairs, each pair including first and second solenoid valves;
- said valve pairs being disposed in parallel fluid communication with a fluid pressure source;
- each of said first and second solenoid valves being alternately actuatable between energized and de-energized states;
- wherein a change of state of the first and second valves of either of said valve pairs is configured to alternately apply fluid pressure above and below the threshold value, to the fluid node.
A method for selectively applying fluid pressure above and below a threshold value to a fluid node, the method comprising:
- providing first and second solenoid valve pairs, each pair including first and second solenoid valves;
- said first and second solenoid valves being alternately actuatable between energized and de-energized states;
- disposing said valve pairs in parallel fluid communication with a fluid pressure source;
- disposing the first and second solenoid valves in fluid communication with one another wherein a change of state of the first and second solenoid valves of either of said valve pairs is configured to alternately apply fluid pressure above and below the threshold value, to the fluid node.
A voting solenoid arrangement configured to selectively apply fluid pressure above and below a threshold value, to a fluid node, said voting solenoid arrangement comprising:
- first and second solenoid valve pairs, each pair including first and second solenoid valves;
- said valve pairs being disposed in parallel fluid communication with a fluid pressure source;
- each of said first and second solenoid valves being alternately actuatable between energized and de-energized states;
- wherein a change of state of the first and second valves of either of said valve pairs is configured to alternately apply fluid pressure above and below the threshold value, to the fluid node;
- said valve pairs being selectively disposed in parallel fluid communication with a low pressure fluid reservoir, said low pressure being below the threshold value;
- a plurality of shut-off valves configured to selectively isolate either one of said valve pairs from the fluid node, wherein the applied pressure is maintained by the other of said valve pairs;
- a plurality of pressure sensors operatively associated with one or more of said first and second solenoid valves to indicate the state thereof;
- and
- the applied fluid pressure configured to be above the threshold pressure when said first and second solenoid valves of either of said valve pairs are disposed in said energized state.
Dependencies are inferred from the claim text.