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1. 发明专利

JP2002031291A WATER COLLECTION PIPE REGENERATION METHOD FOR GAS CONDUIT 失效
公开(公告)号：JP2002031291A
公开(公告)日：2002-01-31
申请号：JP2000216504
申请日：2000-07-17
申请人： TOKYO GAS CO LTD , HAKKO CO
发明人： YANAGIOKA YASUHIRO , KAWAGUCHI YASUSADA , NAKAGAWA TETSUO , YAGI SHUICHI , SHIGEFUJI TAKASHI , OSHIMA KENJI , NOZAKI SHUICHI , MAKITA YUSUKE
IPC分类号： F16L55/16 , B05C7/04 , B05D7/22
摘要： PROBLEM TO BE SOLVED: To provide a water collection pipe regeneration method for preventing gas leakage from the water collection pipe attached to a gas conduit due to aging corrosion. SOLUTION: A stainless steel pipe 10 having the outside diameter smaller than the inside diameter of the water collecting pipe 3, an expansion type stopper jig 20, and a resin injection hose 11 positioned between the water collection pipe 3 and the stainless steel pipe 10 are inserted from an opening end of the existing water collection pipe 3 in the ground side. After the bottom end opening part of the water collection pipe 3 and the bottom end opening part of the stainless steel pipe 10 are tightly closed by the expansion type stopper jig 20, urethane resin R is injected and closes between the outer circumferential face of the stainless steel pipe 10 and the internal circumferential face of the water collection pipe 3 by the resin injection hose 11. Then, the expansion type stopper jig 20 id drawn out from the water collection pipe 3 and the stainless steel pipe 10 so that the bottom end opening part of the stainless steel pipe 10 and the bottom end opening part of the water collection pipe 3 are communicated together.

2. 发明专利

JP2002031290A SEAL JIG 失效
公开(公告)号：JP2002031290A
公开(公告)日：2002-01-31
申请号：JP2000216505
申请日：2000-07-17
申请人： TOKYO GAS CO LTD , HAKKO CO
发明人： YANAGIOKA YASUHIRO , KAWAGUCHI YASUSADA , NAKAGAWA TETSUO , YAGI SHUICHI , SHIGEFUJI TAKASHI , OSHIMA KENJI , NOZAKI SHUICHI , MAKITA YUSUKE
IPC分类号： F16L55/12 , F16J15/10
摘要： PROBLEM TO BE SOLVED: To provide a seal jig capable of completely and tightly closing a prescribed position of a pipe by being detachably inserted in the pipe. SOLUTION: In the seal jig closing the pipe inside by a seal bag inserted in the pipe in a contracted state by the load of an internal pressure, a skirt 10C formed of an elastic material is externally fitted around the outer circumferential face of the seal bag 10A and, when the seal bag 10A is inflated by the expansion of the seal bag 10A, the skirt is expanded diametrically outward with the inflation of the seal bag 10A so as to be pressedly sandwiched in a space toward the internal circumferential face of the pipe P.

3. 发明专利

JPH09217887A METHOD FOR REMOVAL OF WATER FROM GAS PIPE 失效
公开(公告)号：JPH09217887A
公开(公告)日：1997-08-19
申请号：JP2369496
申请日：1996-02-09
申请人： TOKYO GAS CO LTD
发明人： SAKASAI RYUJI , NAKAGAWA TETSUO , WADA NAOKI , YOKOHARI HIROSHI
IPC分类号： F16L55/07 , F16L55/18
摘要： PROBLEM TO BE SOLVED: To drain water without necessitating cutting and connection of a pipe by, after installing a joint member provided with a branch port on the outer side of a water accumulating location of the gas pipe and on both upper and lower sides of the pipe and drilling a pipe wall with a drill through the branch port of an upper joint member, exhausting water inside the gas pipe into a water tank. SOLUTION: A gas pipe 3 is held by a pair of clamps 1a and 1b provided with branch ports 2a and 2b on the outer side of its water accumulating location (a), and fixed with bolts and nuts 4. Next, after a hose 6 leading to a water tank is connected to the branch port 2b of the lower side clamp 1b, the upper and lower side walls of a gas pipe 3 are drilled with a drill 7 through the branch port 2a of the upper side clamp 1a. Then, with a no-blow back 8 installed at the branch port 2a, the drill 7 is removed and a plug 9a is installed into the branch port 2a. By this, water accumulated in the gas pipe 3 is drained from the branch port 2b through the hose 6. After that, plugs 9a and 9b are installed into the branch ports 2a and 2b so as to complete a work.

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