WORKING DEVICE FOR AN INTERNAL PIPE AND WORKING METHOD FOR THE SAME
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United States of America Patent
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Issued Date -
Apr 19, 2012
app pub date -
Jun 21, 2010
filing date -
Jun 28, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided are a method and a device for performing work in pipelines, whereby it is possible to exert an extremely large driving force within a pipeline. Moreover, provided are a method and a device for performing work in pipelines, which are provided with a means for forcibly drying the wet inner surface of a pipeline. The device is provided with an annular pressure boundary seal with a free-end portion that comes into contact with the inner wall of the pipeline. The seal separates the space within the pipeline into two spaces, a space (A) and a space (B), using the seal as a boundary. The end of the space (A) adjacent to the seal is connected with a suction pump via a hose, while the other end of the space (A), which is not adjacent to the seal, is connected with the fluid surrounding the pipeline via a vacuum breaker that adjusts the negative pressure within the space (A). A hose is disposed in the space (B) and the end of the space (B), which is not adjacent to the seal, is connected with the fluid that surrounds the pipeline.
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