Linebreak detection system

Details Linebreak detection system Linebreak detection system

1977-09-29

1978-08-29

Ruehl, Charles A.

Measuring and testing

With fluid pressure

Leakage

137 12, G01M 328

Patent

active

041095120

ABSTRACT:
A pipeline break detection system wherein a rate timing device is activated in response to a predetermined pressure drop in the pipeline to direct a signal and activate the on-delay cycle of an energy-blocking device, such as a relay switch in an electric circuit. The timing device then commences an off-delay cycle, and if such cycle continues to completion, it cancels the countdown of the on-delay relay. However, if the pipeline experiences a further like pressure drop, before the timing device completes its cycle, it will be recharged and remain activated to keep the on-delay relay actuated. If the pipeline pressure fails to level off to allow the rate timer relay to close, and the on-delay relay is thus enabled to complete its timed cycle, the relay closes to deliver an electrical signal.

REFERENCES:
patent: 3612081 (1971-10-01), Williams
patent: 3665945 (1972-05-01), Ottenstein
patent: 3776249 (1973-12-01), Wailes et al.
patent: 3952759 (1976-04-01), Ottenstein

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