FIELD: machine engineering.
SUBSTANCE: control unit of the passive pipeline protection system contains a tank connected to the pipeline to be protected and a non-return valve. The container, connected to the pipeline to be protected is divided movably hermetically into two cavities, one connected to the pipeline to be protected. The other two lines with the capacity of the accumulator with a variable volume, serving as a drain. One line is connected directly through the non-return valve, and the second line through the control mechanism and the hydraulic drive of the pipeline valves, through the hydraulic cylinder of the hydraulic accumulator, thus forming a closed loop filled with working fluid.
EFFECT: invention makes it possible to improve the reliability of the control of the passive protection of pipelines.
2 cl, 3 dwg
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