PIPELINE ISOLATION DEVICE Russian patent published in 2017 - IPC F16L55/105 F16L55/12 

FIELD: transport.

SUBSTANCE: invention relates to pipeline transportation and can be used to shut down the existing pipelines within the limits of the transported medium pressures up to 4 MPa. The top and bottom cylindrical housings of the claimed overlap device are hydraulically connected to one another with central end-to-end channel. The device includes a steering wheel connected with screw sub-assembly, and cylindrical housings placed inside the top and bottom and a screw, rod and covering module sequentially attached to the screw sub-assembly. Covering module is mounted on the overlapping end of the rod and is made as a central panel connected to a rod, joints in the central longitudinal vertical plane. With central shield flexibly connected to two side arcuate segments pivotally connected to the rod in the horizontal plane. On the shield end surface and the two side arcuate segments, as well as at the spot of shield straight sections connections with two side segments sealing elements are mounted.

EFFECT: invention provides safety and manufacturability at work on the existing pipeline shutdown.

6 dwg