Device for moving a pig through a conduit, such as a pipeline, and sealing means for a device of this type
AssigneePII Pipetronix GmbH
InventorsSergei Filippovitch, Jukka Maki
Life of this patent
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Abstract
A device for moving a pig through a conduit, such as a pipeline, is proposed, comprising at least one pulling element with at least one sealing means. The sealing means comprises a supporting structure with variable circumference with at least one sealing element disposed on the circumference of the supporting structure. In a preferred embodiment, the supporting structure comprises supporting arms disposed substantially radially and being pivotable about axes, each perpendicular to the longitudinal central axis of the pulling element, and is mounted to the pulling element via the supporting structure and a central sleeve which can be fixed to the pulling element.
Claims26
A device for moving a pig through a conduit, the device comprising:
- a pulling element;
- a support structure communicating with said pulling element, said support structure having a variable circumference;
- and
- at least one sealing element disposed on said variable circumference of said support structure, said sealing element made from a flexible material, wherein said sealing element comprises a plurality of partially-cylindrical sealing sections disposed next to one another in a circumferential direction and communicating with each other at lateral end regions of their outer sides.
A sealing means for moving a pig through a conduit by means of a pulling element, the sealing means comprising:
- a support structure communicating with the pulling element, said support structure having a variable circumference;
- and
- at least one sealing element disposed on said variable circumference of said support structure, said sealing element made from a flexible material, wherein said sealing element comprises a plurality of partially-cylindrical sealing sections disposed next to one another in a circumferential direction and communicating with each other at lateral end regions of their outer sides.
Dependencies are inferred from the claim text.