Fluid flow control device for monitoring the fluid flow in a con

Details Fluid flow control device for monitoring the fluid flow in a con Fluid flow control device for monitoring the fluid flow in a con

1981-02-26

1982-10-26

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

73 405R, 137460, 137486, G01M 328, G05D 706

Patent

active

043556540

ABSTRACT:
A device for monitoring the flow of fluid in a pair of conduits and blocking the flow of fluid in a conduit when leakage of fluid is sensed therein. The device is provided with, a pair of inlet and outlet passageways in which fluid flows to and from the conduits, a pair of solenoid operated shutoff valves for blocking the flow of fluid in the inlet passageways and a pair of check valves for blocking the backflow of fluid through the outlet passageways. Means are supplied for (a) sensing the flow of fluid through the passageways and translating the same into an electrical signal for comparison with a norm, and (b) actuating the closing of a shutoff valve to block the flow of fluid into a conduit which is connected between an inlet and outlet passageway in which the electrical signal, corresponding to the flow of fluid therein, differs from the norm, the means being designed to delay actuation of the shutoff valve until it is determined that the change in signal from the norm is the result of actual leakage of fluid from the conduit.

REFERENCES:
patent: 1803437 (1931-05-01), Riney
patent: 2589371 (1952-03-01), Griffin
patent: 3664357 (1972-05-01), Kreiss

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