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US 12,442,465 B2Granted
Valve driving with mechanical delay
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorMateus Henrique Ferreira De Araujo
Life of this patent
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Abstract
The present invention provides an electro-pneumatic arrangement to act as a mechanical timer (delay) in ON-OFF valve actuators. The arrangement comprises: two directional valves (1 and 2) with three ways and two positions, actuated by solenoid; a three-way, two-position directional valve (3), actuated by a pneumatic pilot; a set of compressed air conditioning with filter and pressure regulating valve (4); a valve metering (precise flow rate adjustment) (5), a check valve (6); and an accumulator vessel (7).
Claims3
A valve driver with a mechanical delay, the valve driver comprising;
- two directional valves, each of the two directional valves having three ways and two positions, each of the two directional valves actuated by an electrical solenoid;
- a three-way, two-position directional valve actuated by a pneumatic pilot fluidically coupled and actuable by the two directional valves;
- a set of compressed air conditioning with filter and pressure regulating valve;
- an accumulator vessel;
- flowrate adjustment valve arranged and configured to regulate a flowrate from the accumulator vessel;
- a check valve arranged and configured to allow flow into the accumulator vessel.
3 more elements
Dependencies are inferred from the claim text.