VALVING SYSTEM FOR ALARM SHUTOFF Russian patent published in 2008 - IPC F16K17/24 

FIELD: valving systems.

SUBSTANCE: valving system comprises housing with adjacent chambers, seat, and inlet and outlet openings connected with the pipelines. The spaces of the chambers are made of passages and are interconnected. The inlet space receives pressure drop regulator. The seat is mounted at the site of conjugation of the pipeline with the outlet opening. The space of the second chamber is in communication with the third chamber through the drain passage and with the pulse pipeline that is connected with the pressure pipeline. The third chamber receives the movable piston provided with the sealing surface spring-loaded from the side of the arrester of the piston stroke and adjusting bolt with the seat surface for the spring connected with the housing by means of a threaded connection. The adjacent chamber receives the stop valving member made of a plunger with return spring and arrester of the return stroke. When the system is in operation, the plunger engages the rod of the piston. The drain passage receives the control throttle device made of a valve with a cone. The arrester of piston stroke is made of a stop ring and is set in the bottom section of the working chamber above the inlet passage of the return pipeline. The piston is provide with the locator of neutral position made of a cylindrical locking member mounted in the dummy opening made in the piston. The locator is spring-loaded with respect to the piston and is provided with convex face wall. The dummy opening is in communication with the return pipeline from the side of the convex face surface of the locator through the by-pass pipeline and with the working chamber of the housing through the overflow opening. The by-pass pipeline has a seat conjugated with the convex face wall of the locator when the piston is at the top position. The return pipeline is connected with the high-pressure flexible hoses through a set of check valves connected in parallel. The high-pressure flexible hoses are connected with driving devices, e.g., hydraulic motors and hydraulic cylinders, through the pressure lines of the hydraulic distributor.

EFFECT: expanded functional capabilities and enhanced reliability.

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