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US 4,278,108 AGranted
Control mechanism for two cut-off devices mounted in series
AssigneeNeyrpic
InventorSeverin Casacci
Life of this patent
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Abstract
A mechanism for controlling two rotatable cut-off devices which are mounted in series in a shell for connection to one and the same pipe, comprises a jack in respect of each cut-off device, each jack being articulated to a lever fast with a journal of a respective one of the cut-off devices and to the shell in the zone thereof supporting the journals of the other cut-off device. The invention is particularly applicable to the valves for protecting a hydraulic machine in a high-fall hydraulic power station.
Claims5
A hydraulic valve assembly, particularly for use in a high-drop hydraulic turbine installation, said valve comprising:
- dual rotary valves arranged in tandem, said valves each having a casing which is rigidly interconnected with the casing of the other of the valves in series flow relationship;
- a rotary valve member within each casing;
- a journal associated with the valve member of each valve and which extends diametrically through the casing and terminates at at least one of its ends exteriorly of the casing;
- an operating lever rigidly attached at one end to said one exteriorly extending end of each of said journals;
- a hydraulic jack journalled at one of its ends to the other end of each of said operating levers;
- and
- a member carried by the other valve casing of each of said valves and which provides a support for an opposite end of each of said hydraulic jacks.
4 more elements
Dependencies are inferred from the claim text.