Device for work implementation without stopping flow, and method for work implementation without stopping flow
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United States of America Patent
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May 9, 2017
Grant Date -
Jun 16, 2016
app pub date -
Feb 17, 2016
filing date -
Oct 17, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus including: a sealing case having a branch hole formed in a first separate case and extending in the radial direction of an existing pipe; and a rubber packing for sealing a gap between the sealing case and the existing pipe, wherein: the first separate case has a flange for attachment and removal of a boring machine; the sealing case reciprocates in a pipe axis direction; the rubber packing forms; a first sealed area surrounding a portion of the sealing case for shutting the branch hole; a second sealed area being adjacent to, sealed against, displaced from the first sealed area in the pipe axis direction, and sized so as to be able to shut the opening bored by a cutter; and a tolerance space, into which a second seal ring escapes, is formed between a packing attachment groove and the second seal ring.
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