主权项 |
1. A pig for cleaning of a pipeline, the pig comprising:
a body for passing through the pipeline, wherein the body comprises a polymer foam material and has an outer surface for cleaning an inner surface of the pipeline, a vibration unit within the body for generating vibrations and for transmitting the vibrations to the outer surface of the body, wherein the vibration unit is enclosed by the outer surface, wherein the vibrations are transmitted from the vibration unit to the outer surface of the body through the soft polymer foam material of the body, and wherein the soft polymer foam material is arranged to move in oscillation with the vibrations. |