Fluid handling – Diverse fluid containing pressure systems – Gas pressure storage over or displacement of liquid
Patent
1980-05-14
1982-07-20
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Gas pressure storage over or displacement of liquid
137568, 138 26, 251 611, G05D 1113
Patent
active
043400795
ABSTRACT:
A pressure surge relief system for a liquid transporting pipeline, comprising a surge relief line adapted to be tapped from the pipeline. The relief line includes a valve which is conditioned to open quickly to substantial flow when the pressure in the line exceeds a predetermined safe limit, which is well above the normal pipeline pressure. When the valve opens, it diverts to a closed receptacle, that quantity of liquid which is necessary to prevent the pressure from exceeding said predetermined limit. Hence, in the event of the surge, much of the pressure is absorbed in the liquid and pipe, and just that quantity of liquid which is necessary to relieve pressures of unsafe proportions is discharged to the closed receptacle. The receptacle is pre-charged with a gas to cushion the impact of the surge and also includes means to dissipate energy of the liquid surge and to bring the liquid to a state of quiescence as quickly as possible. A return duct evacuates the reservoir to the pipeline when the surge subsides.
REFERENCES:
patent: 2565374 (1951-08-01), Kitchel
patent: 2896862 (1959-07-01), Bede
patent: 3148745 (1964-09-01), Jones
patent: 3157202 (1964-07-01), Sadler
patent: 3911941 (1975-10-01), Gerbic
Dawson Patricia A.
Keech Andrew E.
Smith Bryan
Cohan Alan
Grove Valve and Regulator Company
Stidham Melvin R.
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