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1. 发明专利

DE69825139T2 未知
公开(公告)号：DE69825139T2
公开(公告)日：2005-08-11
申请号：DE69825139
申请日：1998-10-05
申请人： TOKYO GAS CO LTD , OSAKA BOSUI CONSTRUCTION CO
发明人： HAYASHI MITSUTOSHI , KOMORI MITSUNORI , KOSEKI MASATO , MINAMI TOMOYUKI , MIZUKAMI SEIJI , BANRAI YUICHI , MIYAZAKI YASUO , KAMIDE AKIRA , TANIMURO HIROHISA , UCHIDA TAKESHI
IPC分类号： B29C53/08 , B29C63/34 , F16L55/165 , A23J3/14
摘要： A method of lining a channel can be provided which includes the steps of: installing at a work site a roll having wound thereon a rigid or semirigid plastic pipe shaped initially in the form of an approximately round tube and deformed from the initial form to a flat tubular form, paying off the pipe as softened by heating from the roll installed at the work site toward an inlet of the channel to be lined, and folding the paid-off flat pipe in two to a U shape at a position between the roll and the channel inlet. The U-shaped pipe is hardened by forced cooling from outside immediately after the folding step while being restricted in shape, then inserted into the channel while being thus hardened and thereafter restored to the initial form by being inflated with heat and pressure applied from inside, whereby a lining of improved quality can be formed with an improved work efficiency.

2. 发明专利

DE3850124T2 未知
公开(公告)号：DE3850124T2
公开(公告)日：1994-09-15
申请号：DE3850124
申请日：1988-07-08
申请人： OSAKA BOSUI CONSTRUCTION CO
发明人： MIYAZAKI YASUO , KAMIDE AKIRA , SAITO YOSHIAKI
IPC分类号： B29C53/32 , B29C63/34 , F16L55/165
摘要： Inserting a rigid plastic lining tube into a conduit comprises pulling out a rigid plastic tube in a flatly folded state wound around a drum and inserting it into a conduit as the plastic tube is pulled out of the drum. A heated fluid is supplied into the conduit so that the heated fluid flows from one end opening of the conduit to the other and heating the whole of the inner circumferential surface of the plastic tube with this heating fluid flowing through the conduit, to soften the same tube. The plastic tube is softened with heat uniformly along the whole length with the plastic tube kept in a wound state. It can also be maintained in a thermally softened state even while the tube is inserted into the conduit. The insertion of the rigid plastic tube into the conduit can be carried out at high efficiency. Even when the conduit has a bent portion at an intermediate part, the plastic tube can be easily inserted as it is passed through the bent portion.

3. 发明专利

DE69825139D1 未知
公开(公告)号：DE69825139D1
公开(公告)日：2004-08-26
申请号：DE69825139
申请日：1998-10-05
申请人： TOKYO GAS CO LTD , OSAKA BOSUI CONSTRUCTION CO
发明人： HAYASHI MITSUTOSHI , KOMORI MITSUNORI , KOSEKI MASATO , MINAMI TOMOYUKI , MIZUKAMI SEIJI , BANRAI YUICHI , MIYAZAKI YASUO , KAMIDE AKIRA , TANIMURO HIROHISA , UCHIDA TAKESHI
IPC分类号： B29C53/08 , B29C63/34 , F16L55/165 , A23J3/14
摘要： A method of lining a channel can be provided which includes the steps of: installing at a work site a roll having wound thereon a rigid or semirigid plastic pipe shaped initially in the form of an approximately round tube and deformed from the initial form to a flat tubular form, paying off the pipe as softened by heating from the roll installed at the work site toward an inlet of the channel to be lined, and folding the paid-off flat pipe in two to a U shape at a position between the roll and the channel inlet. The U-shaped pipe is hardened by forced cooling from outside immediately after the folding step while being restricted in shape, then inserted into the channel while being thus hardened and thereafter restored to the initial form by being inflated with heat and pressure applied from inside, whereby a lining of improved quality can be formed with an improved work efficiency.

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