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1. 发明专利

JPH07103380A FLEXIBLE PIPE JOINT 失效
公开(公告)号：JPH07103380A
公开(公告)日：1995-04-18
申请号：JP24664193
申请日：1993-10-01
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , UENO TOSHIYUKI , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITO MORIO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PURPOSE:To improve connecting workability by inserting a flexible pipe into a temporarily assembled fitting mainframe and a nut and sliding the nut into a really fastened condition to compress a seal packing with a stopper and lock the flexible pipe. CONSTITUTION:During connection, a joint main body 10 is locked to a nut 20 in a temporarily assembled condition in such a state that a seal packing 30 and a stopper 40 are mounted to a pipe socket 18 in the joint main body 10. When a flexible pipe 50 is put through the rear end of the nut 20 in such a state, the pipe 50 is inserted into the packing 30 while pushing and enlarging the inside face of a key-shaped locking portion 43 of the stopper 40 at the end 51 of the pipe, and nut in contact with an O-ring 14 mounted on a pipe supporting wall 17. At this time, the stopper 40 is fitted to the outer periphery of the pipe 50 by the elastic resilience of the packing 30 and a retainer ring 44. Then, when the nut 20 is slided to the fitting main frame 10, a stopper ring 11 is shrinked and fitted into a really-fastening annular groove 22 in the nut 20 to lock the nut 20 to the main body 10.

2. 发明专利

JPH06129550A GAS COCK 失效
公开(公告)号：JPH06129550A
公开(公告)日：1994-05-10
申请号：JP27572392
申请日：1992-10-14
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , MITSUWA GAS KIKI KK , KOYO SANGYO CO , SANKO GAS SEIKI KK
发明人： SAITO MORIO , TANIGUCHI TAKEHITO , TSUTSUMI CHIAKI , YOSHIKAWA ISAO , DENDA HITOSHI , HASEGAWA MICHIO , SAKUMI SEIICHIROU
IPC分类号： F16K5/02 , F16K5/22
摘要： PURPOSE:To provide a gas cock which can retain rotating operability and sealing performance for a long period of time even under a severe service condition. CONSTITUTION:In the body of a gas cock a plug accommodation chamber is provided, in which a plug 2 rotated by an operation shaft is accommodated. wherein the body and the plug 2 are formed from the same material, and a Ni-P plating film 3 is formed over either the outer surface of the plug 2 or the inner surface of the plug accommodation chamber, and a Sn-plating film 4 is formed over the surface of the Ni-P plating film 3.

3. 发明专利

JPH07103379A FLEXIBLE PIPE JOINT 失效
公开(公告)号：JPH07103379A
公开(公告)日：1995-04-18
申请号：JP24664093
申请日：1993-10-01
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , UENO TOSHIYUKI , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITO MORIO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PURPOSE:To improve connecting workability by inserting a flexible pipe into a joint main body so that the cylindrical portion of a packing is compressed via a stopper and the axially right angle portion of the packing is compressed at the end of the flexible pipe locked to the stopper when a nut is fastened. CONSTITUTION:During connection, a joint main body 10 is partially threaded to a nut 20 in such a state that a seal packing 30 and a stopper 40 are mounted to a pipe socket 14 in the joint main body 10. The flexible pipe 50 is put through the rear end of the nut 20, inserted into the packing 30 while pushing and enlarging the inside face of the stopper 40 at the end 51 of the pipe 50 and put in contact with the axially right angle portion 32 of the packing. At this time, the stopper 40 is fitted and locked to the outer periphery of the pipe 50 by the elastic resilience of the packing 30 to allow the stopping of the pipe 50. When the nut 20 is turned and fastened to the fitting main body 10 in such a state, the stopper 40 is shrinked at the tapered inside face 22 of the nut 20 and the cylindrical portion of the packing 30 is compressed to seal the outer periphery of the pipe 50.

4. 发明专利

JPH07103381A FLEXIBLE PIPE JOINT 失效
公开(公告)号：JPH07103381A
公开(公告)日：1995-04-18
申请号：JP24664393
申请日：1993-10-01
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , SAKUMI SEIICHIROU , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITO MORIO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PURPOSE:To provide a joint which is connectable with one step and uniformly held on a flexible pipe by a stopper. CONSTITUTION:A flexible pipe joint consists of a stopper 50 mounted in a stopper groove 16, which has the tapered inside face 17 so as to be enlarged from the end toward the corner, provided on the inside face of a joint main body where a flexible pipe 20 is inserted, an elastic member to energize the stopper 50 mounted in a spring mounted chamber 15 following the stopper groove 16 to the small-diameter side of the tapered inside face 17, and a packing 18 to seal a packing chamber 14 provided on the corner side of the spring mounted chamber 15 spaced from a wall to the outside face of the flexible pipe 20 mounted therein. The stopper 50 is mounted with both sides held between a retainer guide 51, which has rings spaced one from the other on both sides and connected together at multiple points in the peripheral direction, the outside face of one ring being put in contact with the inside face of the joint main body in a slidable manner, and the rings of the retainer guide 51, so that the inside face can be locked to the outside face of the flexible pipe 20.

5. 发明专利

JPH08219339A OUTSIDE SURFACE RESIN COATED JOINT AND PACKING THEREFOR 失效
公开(公告)号：JPH08219339A
公开(公告)日：1996-08-30
申请号：JP2018795
申请日：1995-02-08
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： NOZAKI HIDEO , SHIKAMATA SHINICHI , SAITO MORIO
IPC分类号： F16L15/04 , F16L58/18
摘要： PURPOSE: To reduce the dispersion of sealing performance so as to prevent corrosion preventing failure and connecting failure and improve workability by mounting an elastic packing provided with an outside surface lip and a protruding end part protruding from a cylindrical part in the state of a pipe being screwed with a joint body. CONSTITUTION: The outside surface of a metal joint body 11 is coated with a resin layer 13, and a cylindrical part 14 is formed protruding from the end part of the joint body 11. A packing storage space 18 is formed between the inner peripheral surface of the cylindrical part 14 and the outer peripheral surface of an outside surface resin coated pipe 15 having an external thread 16 to be screwed with the internal thread of the joint body 11. An elastic packing 19 to be mounted in this packing storage space 18 is provided with an outside surface lip part 21 brought into contact with the outer peripheral surface of the pipe 15 integrally with a resin ring member 20, locked to the resin coating layer 13, of the external thread cut end part of the pipe 15 and also brought into contact with the inner peripheral surface of the cylindrical part 14, and a protruding end part 23 protruding from the end part of the cylindrical part 14 in the state of the pipe 15 being screwed with the joint body 11.

6. 发明专利

JPH08145252A THREADLESS PIPE COUPLING 失效
公开(公告)号：JPH08145252A
公开(公告)日：1996-06-07
申请号：JP29246394
申请日：1994-11-28
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： SHIKAMATA SHINICHI , SAITO MORIO , NOZAKI HIDEO
IPC分类号： F16L19/08 , F16L21/08
摘要： PURPOSE: To provide a threadless pipe coupling which is constituted to have excellent pipe pulling-off resistance and fire resistance and facilitate connection. CONSTITUTION: In a threadless pipe coupling connected in such a way that a connection pipe having an end part in the outer peripheral surface of which an annular groove 31 is formed is inserted in a coupling body 10, the threadless pipe coupling comprises a coupling body 10 provided in the connection pipe socket of an end part with a seal packing 20, a thermal expansive packing 21 and an antislip ring 23 being expansive and contractive and having the inner periphery fitted in the annular groove 31; and a nut joined in a screwed-in state with the socket of the coupling body 10 and pressing the seal packing 20, the thermal expansive packing 21, and the antislip ring 23 in the coupling body 10. A connection pipe is inserted in the socket of the coupling body 10 in such a state that a nut is joined in a screwed-in state with the coupling body and the nut is fastened for connection.

7. 发明专利

JPH09303616A ANTISEISMIC PIPING 失效
公开(公告)号：JPH09303616A
公开(公告)日：1997-11-28
申请号：JP11278496
申请日：1996-05-07
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： TAKADA HIDEMASA , SAITO MORIO , NOZAKI HIDEO , MIZUTANI SHIGERU , TSUTSUMI CHIAKI
IPC分类号： F16L43/00 , F16L1/00 , F16L3/00 , F16L9/06 , F16L57/00
摘要： PROBLEM TO BE SOLVED: To absorb fluctuation formed between a main piping buried in the underground and the main piping of a building so as to obtain good antiseismic performance by connecting and piping a flexible pipe having a prescribed length nearly in a right direction, connecting one end part of the piping to an underground buried piping, and connecting the other end to a feed piping of the building. SOLUTION: In the building 10 built by a base isolation construction method, a laminated rubber 12 is arranged between the building 10 and a ground foundation 11 so as to absorb vibration of the building. A main piping 13 for gas and feed/drain water piped in each floor of the building 10 is connected to an underground buried pipe 14 through an antiseismic piping 20 which is formed in such a constitution that two metal flexible pipings 21, 22 are connected by, for example, metal piping joint elbow 23, whose one end 24 is fixed to a ground side and connected to the underground buried piping 14, and whose the other end 25 is fixed to the building 10 side and connected to the piping 13 in the building. The pipe joint elbow 23 is mounted and fixed to a frame 30 installed a coma which is moved freely on its lower part.

8. 发明专利

JPH08247354A RESIN-COATED PIPE JOINT 失效
公开(公告)号：JPH08247354A
公开(公告)日：1996-09-27
申请号：JP5579695
申请日：1995-03-15
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： NOZAKI HIDEO , SHIKAMATA SHINICHI , SAITO MORIO
IPC分类号： F16L19/06
摘要： PURPOSE: To provide a positive anticorrosive sealing performance with a simple execution by screwing and clamping a resin cap nut screwed onto a male screw of a resin coating layer to compress a packing, thereby sealing the area between the resin coating layer of a joint body and the external resin resin coating layer of a connecting pipe to be jointed. CONSTITUTION: With a joint main body 1 of a screwed type of pipe joint made of malleable cast iron, vinyl chloride resin is injection-molded to produce a resin coating layer 2 on the outer peripheral surface and the end faces of the joint body, and a male screw 21 is provided on the end part of the resin coating layer 2. Then, a cap nut 3 made of vinyl chloride resin, in which a ring rubber packing 4 is loaded, can be screwed onto the resin male screw 21. When externally resin-coated steelpipes 5, 5 are connected, a male screw 52 formed on the outer surface of the end part of the steel pipe 5 is screwed into the female screw 11 of the joint body 1, and then the cap nut 3 is screwed onto the resin male screw 21 to be clamped to compress the rubber packing 4, and thus to seal the area between the resin coating layer 2 of the joint body 1, and the external resin coating layer 51 of the pipe 5.

9. 发明专利

JPH08210567A PIPE JOINT 失效
公开(公告)号：JPH08210567A
公开(公告)日：1996-08-20
申请号：JP5579795
申请日：1995-03-15
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： NOZAKI HIDEO , SHIKAMATA SHINICHI , SAITO MORIO
IPC分类号： F16L19/08 , F16L21/08
摘要： PURPOSE: To secure the extent of positive sealability as well as to enable it to prevent any possible pemetration of external erosive water from occurring by making a slip stopper have a part pushing an end side of packing and another part being compressed on a taper inner surface of a push ring, and consisting of a thermal expansive rubber ring made up of wrapping a biting-in member integrally. CONSTITUTION: A diametrally expanded recee part is installed on an inner circumferential surface of both ends of a joint body 10, using it as a connecting pipe acceptor, while a taper surface 12 is formed in an inmost end of this recess part, and an internal thread 13 screwing a push ring 40 is formed on the end inner circumferential surface. Then, seal packing 20, and a slip stopper 23 inserted with a biting ring 22 in a thermal expansive rubber ring 21 mixed with thermal expansion graphite in rubber both are installed in the recess part of this pipe acceptor in order from the inmoty part. With this constitution, sealing between the joint body 10 and a pipe 30 can be done owing to a compressive action of the seal packing 20, therefore the rubber ring 21 at the end side of the biting-in ring 22 compresses a pipe outer circumferential surface, whereby such a possibility that erosive water from the outside might be penetrated into the joint is thus preventable.

10. 发明专利

JPH08178150A UNIVERSAL JOINT 失效
公开(公告)号：JPH08178150A
公开(公告)日：1996-07-12
申请号：JP32109894
申请日：1994-12-26
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： SAITO MORIO , OKI KATSUHIRO , NOZAKI HIDEO
IPC分类号： F16L27/06 , F16L27/12
摘要： PURPOSE: To prevent the occurrence of serious leakage during the occurrence of a fire and to provide reliable sealing ability in an ordinary working state. CONSTITUTION: A joint sleeve 20 is oscillatorily coupled to a coupling body 10 in a seal state through compression of seal packings 31 and 32. Even when the seal packings 31 and 32 are burnt out during the occurrence of a fire, since a thermal expansion packing 40 mounted in a recessed groove 15 is expanded to embed the outer surface of the protrusion spherical surface 21 of the joint sleeve 20, serious leakage does not occur. Further, since the thermal expansion packing 40 presses the maximum diameter part on a central axis of the protrusion spherical surface 21 toward the central side is moved to one of the right and the left on an axis to prevent the increase of the expansion space of the thermal expansion packing 40, and fire resisting performance by the thermal expansion packing 40 is ensured. This constitution ensures sealing ability of an oscillating coupling part between the coupling body 10 and the joint sleeve 20, and prevents leakage of fluid, such as city gas, flowing through the coupling.

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