| 摘要 |
The present invention relates to a device intended to be passed through a pipeline of variable diameter, propelled by a liquid flowing inside said pipeline. The device has an elongated cylindrical body ( 2 ) made of polymer foam, with a number of deep channels ( 5 ) equally spaced from each other, coiled around the length of the cylindrical body ( 2 ) of the pig ( 1 ), beginning close to one end of the body ( 2 ) and ending close to the other end. These ends have a basically bulled-nosed shape, conferring a symmetrical aspect. Structural cleaning elements ( 6 ), not interconnected, are inserted inside the cylindrical body ( 2 ) of the pig. They are made of elastomeric material and have a central core ( 7 ) with spiral scraping extensions ( 8 ) of the same number as the deep channels ( 5 ) in the body ( 2 ) of the pig ( 1 ). The spiral scraping extensions ( 8 ) are at an angle to the axis of the cylindrical body ( 2 ) of the pig ( 1 ) as well as to the scraping extensions ( 8 ) of the adjacent modules, inasmuch as they follow the configuration of the spiral channel ( 5 ).
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