UNDERWATER PIPELINE WITH VALVE ASSEMBLY FOR PUMPING LIQUID MEDIUM FROM IT Russian patent published in 2023 - IPC F16L1/16 

FIELD: construction of underwater pipelines.

SUBSTANCE: invention can be used when carrying out repair and emergency restoration work. During its construction or major repairs, an underwater pipeline is equipped with fittings that serve to pump out liquid media from it. The fittings are installed at the maximum depths of the underwater pipeline, taking into account the technical feasibility of their installation. The valve units consist of a tee with a flow area equal to the flow area of the underwater pipeline pipe, shut-off valves, and a suction pipeline connection unit. When carrying out repair and emergency restoration work, to pump out liquid medium from the pipeline, a suction pipeline connected to the pumping unit is connected to the suction pipeline connection unit after dismantling the plug. Then open the shut-off valves and turn on the pumping unit. The liquid medium is pumped from the pipeline. At the end of pumping, the pumping unit is turned off, the shut-off valves are closed, the suction pipeline is dismantled, and a plug is installed on the pipe. The remaining liquid working medium is removed by passing a cleaning piston through the pipeline.

EFFECT: invention makes it possible to reduce the pressure for advancing the cleaning piston, which reduces the likelihood of it stopping and reduces the negative impact on the surrounding aquatic environment.

1 cl, 3 dwg