Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1992-03-13
1993-06-22
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
137500, 137613, G05D 1610
Patent
active
052209407
ABSTRACT:
To measure and control the flow of fluid through a passageway, a venturi meter and a regulator are disposed in the passageway. The area of the cross-section gradually decreases and then gradually increases. The venturi meter also has first and second static pressure ports, the first port being located at a relatively wide portion of the venturi meter, and the second port being located at a narrower portion of the venturi meter. Each of the ports is disposed about the circumference of the venturi. A regulator, or another type of adjustable valve variably impedes flow through the passageway. A controller measures the static pressure at first and second ports and adjusts the regulator or valve based on the static pressure measured at the first and second static pressure ports.
Another device for controlling flow through a passageway comprises a piston having one face exposed to the fluid in the path and forming part of a venturi disposed in the passageway such that the conduit has a cross-sectional area that decreases and then increases. An actuator adjusts the position of the piston based on the static pressure measured at first and second static pressure ports.
REFERENCES:
patent: 2918933 (1959-12-01), Boitnott
patent: 3138174 (1964-06-01), Gilpin
patent: 3237616 (1966-03-01), Daigh et al.
patent: 3605788 (1971-09-01), Brown
patent: 3978883 (1976-09-01), Petersen
patent: 4431020 (1984-02-01), Kowalski
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