Patent ID: 6308363
Filing Date: 2001-10-30
Classification: B08B

Abstract:
A bidirectional scraping device for use in removing material adhering to the inner walls of a pipeline, said device being moved inside the pipeline, in use, by means of the actual flow of the fluid flowing through the pipeline, wherein said device is of modular construction and comprises:a plurality of groups of flexible radial scraping bars which are spaced apart and offset angularly so that the bars are able to scrape substantially the entire inner surface of the said pipeline;a flexible shaft onto which said plurality of groups of flexible radial scraping bars is assembled; andat least one flexible sealing module fitted on said flexible shaft, wherein each flexible sealing module has channels and sealing ribs so that the sealing ribs can expand laterally and consequently fill in the empty gaps defined by the channels when the scraping device passes through a section of the pipeline in which there is a reduction in diameter.