FIELD: pipeline engineering.
SUBSTANCE: device comprises at least one flexible stop chamber and mechanism for its setting provided with the movable rod. The flexible stop chamber is mounted on a telescopic and flexibly deformed rod. The wedging mechanism is mounted on the rod downstream of the flexible stop chamber. The wedging mechanism comprises unmovable sleeve mounted on the rod, sliding sleeve which is actuated by means of hydraulic cylinders, and pressing blocks with pins which are connected with the sleeves. The surface of the stop chamber is provided with the flexible sealing collars. The stop chamber is multi-sectional.
EFFECT: enhanced reliability.
7 cl, 4 dwg
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