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1. 发明专利

JP2001349500A LEAKAGE DETECTING DEVICE FOR BELLOWS TYPE EXPANSION PIPE JOINT 失效
公开(公告)号：JP2001349500A
公开(公告)日：2001-12-21
申请号：JP2000170272
申请日：2000-06-07
申请人： TOYO RASENKAN KOGYO KK
发明人： SAITO MASAJI
IPC分类号： F17D5/02
摘要： PROBLEM TO BE SOLVED: To provide a leakage detecting device for a bellows type expansion pipe joint capable of visually confirming the presence or absence of the leakage at a glance. SOLUTION: This leakage detecting device for the bellows type expansion pipe joint A used as a pipe joint mounted on the way of a piping for gas or liquid, and having a bellows type expansion part 3 with a double pipe structure composed of an inner pipe 1 and an outer pipe 2, and a pressure detecting means 8 for detecting the pressure in a leakage detecting path 6, comprises a casing 10 communicated to the leakage detecting path 6, and the pressure detecting means 8 having a pressure sensitive operating means 11 accommodated in the casing 10 and operated in increasing the pressure in the leakage detecting path 6, and a detector 12 being projected from the casing at its tip by the operation of the pressure sensitive operating means 11, and the detector is projected from the casing when the inner pipe is damaged, and the pressure in the piping is introduced into the leakage detecting path.

2. 发明专利

JPH1019186A PIPELINE INNER SURFACE WATER STOP METHOD AND CLAMP MOUNTING DEVICE USED THEREFOR 失效
公开(公告)号：JPH1019186A
公开(公告)日：1998-01-23
申请号：JP17466496
申请日：1996-07-04
申请人： NIPPON HUME PIPE , HANEDA FUME CAN KK , NAKAGAWA FUME KAN KOGYO KK , NIPPON ZENITH PIPE , TEIHIYUU KK , NIPPON STEEL FIBER KK , TOYO RASENKAN KOGYO KK
发明人： SUZUKI HAJIME , FUKITANI ICHIROU , NOGUCHI MASAHIRO , TSUSHIMA YUKITO , YOSHIKAWA NOBUYOSHI , OKAMURA CHIYOMATSU , TERADA KENEI
IPC分类号： E03F3/04 , F16L55/16 , F16L57/00
摘要： PROBLEM TO BE SOLVED: To provide a pipeline inner surface water stop method and a clamp mounting device used in this method enabling a worker to smoothly perform pipeline laying work mainly for sewage or the like with a small diameter where he cannot enter or it is hard for him to enter and enabling the worker to perform leakage place repairing work easily in a short time without digging up buried sediment. SOLUTION: A water stop cylindrical body 15 formed of elastic material of such a size as to come in contact with the inner peripheral surface of a joint part or another leakage part of a pipeline is inserted into the joint part or another leakage part. A ring-like clamp 16a formed of metallic material is then inserted in the water stop cylindrical body 15, and pressure is applied to the ring-like clamp 16a in the direction of pushing to enlarge from its inner surface so as to plastically deform and fix the water stop cylindrical body 15 to the inner surface of a buried pipe from the inner surface. The ring-like clamp 16a is mounted using a clamp mounting device provided with a cylindrical elastic pressure member 25 radially deformed by axial compression, an inner surface support cylinder 23 for regulating the center direction deformation of the elastic pressure member 25, a pair of pressure rings 26a, 26b axially pressurizing both ends of the elastic pressure member 25, and a jack 21 for relatively moving both pressure rings 26a, 26b in an axial direction.

3. 发明专利

JP2002267091A CONNECTING STRUCTURE OF METAL EXPANSION-CONTRACTION FLEXIBLE PIPE IN PIPELINE 失效
公开(公告)号：JP2002267091A
公开(公告)日：2002-09-18
申请号：JP2001066580
申请日：2001-03-09
申请人： TOYO RASENKAN KOGYO KK
发明人： KIMURA HIROSHIGE , YAMAMOTO KOZABURO
IPC分类号： F16L21/02 , F16L25/02 , F16L58/10
摘要： PROBLEM TO BE SOLVED: To provide a connecting structure of a simple-constitution expansion- contraction flexible pipe favorably and electrically insulating various types of metal pipes from one another. SOLUTION: This connecting structure of the metal expansion-contraction flexible pipe in a pipe line is formed by providing a spigot 20 provided in the end of the expansion-contraction flexible pipe 1 composed of corrosion-resistant metal material such as stainless steel having a bellows type expansion part, a socket 4 molded of a different type of metal material from that of the expansion-contraction flexible pipe 1 such as ductile cast iron and for inserting the spigot 20, and a fastening means fixing the spigot inserted into the socket 4 so as not to be pulled out. An electric insulation material lining layer 21 covers over the surface of the spigot 20 of the expansion-contraction flexible pipe so as to electrically insulate the spigot 20 from the fastening means and the socket 4.

4. 发明专利

JPS5166114A Nanjakujibanniokerukagyoseitonneru oyobi sonosekoho 失效
公开(公告)号：JPS5166114A
公开(公告)日：1976-06-08
申请号：JP13958574
申请日：1974-12-06
申请人： Toyo Rasenkan Kogyo Kk
发明人： KIMURA HIROSHIGE
IPC分类号： E21D9/06 , F16L1/00

5. 发明专利

JPH10212897A CONNECTION STRUCTURE OF PROPULSIVE PIPE 失效
公开(公告)号：JPH10212897A
公开(公告)日：1998-08-11
申请号：JP1524897
申请日：1997-01-29
申请人： NIPPON HUME PIPE , HANEDA HUME PIPE CO LTD , NAKAGAWA FUME KAN KOGYO KK , NIPPON ZENITH PIPE , TEIHIYUU KK , NIPPON STEEL FIBER KK , TOYO RASENKAN KOGYO KK
发明人： SUZUKI HAJIME , FUKITANI ICHIROU , NOGUCHI MASAHIRO , TSUSHIMA YUKITO , YOSHIKAWA NOBUYOSHI , OKAMURA CHIYOMATSU , TERADA KENEI
IPC分类号： E21D9/06 , E03F3/04
摘要： PROBLEM TO BE SOLVED: To form the inner circumferential surface sides of the mutual connecting sections of propulsive pipes smoothly. SOLUTION: An inner circumferential collar 20 formed of a thin metallic pipe or a thin synthetic resin pipe is projected backwards from the rear end face of a Hume pipe (the propulsive pipe) 10A in the front and fixed on the inner circumferential surface side of the rear end section of the Hume pipe 10A. The front section of a cylindrical connecting sleeve 24 having elasticity is fast stuck and fitted slidably on the outer circumferential surface side of the rear projecting section of the inner circumferential collar 20. A width expanding section 13 for fixing is molded on the inner circumferential surface side of the front end section of the Hume pipe 10B at a rear section in response to the wall thickness of the connecting sleeve 24, and a width expanding section 14 for bending is molded in the front section while being opened to the front end face side. The front section of the connecting sleeve 24 is arranged on the inner circumferential surface side of the width expanding section 14 for bending in a bendable manner, and the rear section of the connecting sleeve 24 is pushed and fastened to the inner circumferential side of the width expanding section 13 for fixing from the inner circumferential surface side by a cylindrical metal fitting 26 plastically deformed in an expanding shape to the outer circumferential side and used for fixing.

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