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1. 发明专利

JPH03272388A BLOW METHOD IN ACTIVE PIPE BRANCHING METHOD 失效
公开(公告)号：JPH03272388A
公开(公告)日：1991-12-04
申请号：JP6688390
申请日：1990-03-19
申请人： TOKYO GAS CO LTD , NIPPON KOKAN KK
发明人： TOMIMORI KUNIAKI , TAKATSU KAZUO , SUSA MASAAKI , HAGIO AKIRA , NEMOTO MINORU , ODA MITSUGI , TAKAYANAGI KOJI , WAKAMATSU MIKITO , NAKAYAMA SEIJI
IPC分类号： B23B41/08 , B23B47/34 , F16L1/00 , F16L41/04 , F16L41/06 , F16L55/00
摘要： PURPOSE:To return blow fluid by directly pressurizing the blow fluid by causing the blow fluid to flow through a main pipe through a blow piping, recovering chips by means of a filter, further causing the blow fluid to flow through an orifice to reduce a pressure, and returning the blow fluid in the main pipe in a state that the fluid is boosted in a circulating pipe with the aid of a pressure pump. CONSTITUTION:A blow piping 120 is incorporated, and fluid in a main pipe 100 is introduced through a feed branch pipe 121 to fill all of the blow piping 120, a branch short pipe 102, a gate valve 103, and a boring tool 104 with the fluid. The blow piping 100 is bored by the boring tool 104. When a drill 107 is started to drill through the main pipe 100, a valve 108 and a feed valve 122 are opened. Fluid flows through a filter 123, chips are recovered and filtered. The filtered fluid is caused to flow through an orifice 124 for reduction of a pressure, and the fluid is boosted with the aid of a pressure pump 125 to press it in the main pipe 100. As a result, a storage container is eliminated, a space is saved, and chips are recovered and blow fluid is re-used with high efficiency.

2. 发明专利

JPH02311209A CHIP RECOVERING METHOD OF LIVE PIPE BRANCHING ENGINEERING METHOD AND DRILL CHIP RECOVERING FRAME 失效
公开(公告)号：JPH02311209A
公开(公告)日：1990-12-26
申请号：JP12780589
申请日：1989-05-23
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： TOMIMORI KUNIAKI , TAKATSU KAZUO , SUSA MASAAKI , HAGIO AKIRA , NEMOTO MINORU , ODA MITSUGI , TAKAYANAGI KOJI , ISHINO HIROMICHI , SHIROTA AKIO
IPC分类号： B23B41/08
摘要： PURPOSE:To prevent chips from dropping into a pipe body by mounting a bottomed tube-like recovering frame on the outer peripheral surface of the pipe body on a boring position so that the interior of said frame is enclosed and putting chips in said frame in boring the closed end of said frame with a center drill before the pipe body is drilled by a cutter. CONSTITUTION:An opening end of a frame 1 of a bottomed cylinder is fixedly welded to the outer peripheral surface of a main pipe 100 to be drilled so that the interior of the frame is enclosed, and a short branch pipe 102 is connected to the opening to surround therearound. Then, the enclosed end of the frame 1 is drilled by a center drill 107 and chips 112 then produced are received in the enclosed frame 1. Next, the main pipe 100 is drilled by a cutter 106, while an engaging projection 109 of the center drill 107 is located in the frame 1 and drawn into a drilling machine together with a piece 108 cut off from the main pipe 100. Thus, the chips 112 are in the frame 1 integral with cut-off piece without dropping into the main pipe.

3. 发明专利

JPH03292492A METHOD OF INSERTING VALVE INTO PIPELINE AND VALVE THEREWITH 失效
公开(公告)号：JPH03292492A
公开(公告)日：1991-12-24
申请号：JP9381290
申请日：1990-04-09
申请人： NIPPON KOKAN KK , JAPAN STEEL & TUBE CONSTR , TOKYO GAS CO LTD
发明人： TANABE HIROSHI , FUJIMAKI TERUAKI , NEMOTO MINORU , HAGIO AKIRA , UNEMOTO YASUO , ISHIKAWA MASAKI , OOKA MASAO , SASAKI AKIRA , KAWAI TOSHIAKI , YANAGIHARA AKIRA
IPC分类号： F16L55/00
摘要： PURPOSE:To insert a valve into a pipeline without stopping a flow by installing a gate valve in the fitting of a main pipe, cutting this main pipe, attaching a plug clamper to this gate valve, opening it, and removing the gate valve and the plug clamper from each element, while inserting a stopper into a drill hole of the main pipe, and closing this main pipe. CONSTITUTION:An adapter 111 is attached to a fitting 1 of a main pipe 5 and a gate valve 7 in addition. The main pipe 5 is cut by a cutter 201 of a drill 2000 of the gate valve 7. This drill 200 is removed, and a plug clamper 38 with a plug 105 fitted with a stopper 101 is attached to the gate valve 7. This stopper 101 is held in the adapter 111, and the plug clamper 38 is removed from the adapter 111. The stopper 101 is inserted into a drill part of the main pipe 5 by an extension shaft, having it expanded wide, closing the main pipe 5. In consequence, since an excavating area of a road surface or the like and a working part of the main pipe are few, a construction period is sharply reducible.

4. 发明专利

JPH0319709A CUTTER FOR BRANCHING PIPE 失效
公开(公告)号：JPH0319709A
公开(公告)日：1991-01-28
申请号：JP15051289
申请日：1989-06-15
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： TOMIMORI KUNIAKI , TAKATSU KAZUO , SUSA MASAAKI , HAGIO AKIRA , NEMOTO MINORU , ODA MITSUGI , TAKAYANAGI KOJI , NAKAYAMA TAKAO , MUTA KEIICHI
IPC分类号： B23B51/05
摘要： PURPOSE:To prevent the generation of a strip like cut piece sticked to the main pipe side by giving a main clearance angle that the outside of a blade tip cuts prior to the inside for the pipe body surface to a cylindrical cutter blade tip, and forming a single-blade cutting that the main clearance angle is inclined so as to face to the cutter center shaft. CONSTITUTION:The main clearance angle of a single diamond point tool 106 is set at the angle slightly smaller than the approach angle beta made by the surface line S of the outside part 102a of a blade tip part 102 and the tangent T of the part where the outside part 102a of the blade tip part 102 in the circular arc A made by the surface line S of the outside part 102a of the blade tip part 102a and the inner face 120a of a main pipe 120. The pipe apex part of the main pipe 120 is cut by a cutter 100 and after the blade tip part 102 of the cutter main body 101 reaches the inner face 120a of the main pipe 120, and the outside part of the blade tip of the single diamond point tool 106 formed on the blade tip part 102 completes cutting prior to the inside part, so the cut piece is generated as a burr on a cutting piece 126. Consequently the strip like cut piece generated by cutting is sticked to the cutting piece 126 on the whole as a burr and recovered.

5. 发明专利

JPH02311213A CUTTER FOR BRANCHING LIVE PIPE 失效
公开(公告)号：JPH02311213A
公开(公告)日：1990-12-26
申请号：JP12780389
申请日：1989-05-23
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： TOMIMORI KUNIAKI , TAKATSU KAZUO , SUSA MASAAKI , HAGIO AKIRA , NEMOTO MINORU , ODA MITSUGI , TAKAYANAGI KOJI , WAKAMATSU MIKITO , MUTA KEIICHI
IPC分类号： B23B51/05
摘要： PURPOSE:To reduce damages given to edges by causing a set of cutting tools to have a main relief angle to the surface of a pipe body such that the outside portion of the edge cuts earlier than the inside portion. CONSTITUTION:An edge part 102 formed on an end of a cutter body 101 is provided with a straight cutting tool 200 and a side cutting tool 201 alternately. The straight cutting tool 200 is located inside the cutter body 101 as viewed from the cutting surface side and a portion of an inclined surface in a cut groove of a main pipe is cut on the edge side of a main relief surface 202 contributing to the cut inclined toward the center axis of the body 101. The side cutting tool 201 is located on the outer surface side of the body 101 and inclined toward the inside of the body 101. A relief angle made by the main relief angle 202 of the straight cutting tool 200 is same to cut the remaining portion of the inclined surface of the cut grove on the edge side of the main relief surface 204 contributing to the cutting. Thus, since the edges to share the inclined surface of the cut groove for cutting, the cutting resistances of the respective cutting tools 200, 201 are lessened and damages are also reduced.

6. 发明专利

JPH0565283B2 失效
公开(公告)号：JPH0565283B2
公开(公告)日：1993-09-17
申请号：JP12780589
申请日：1989-05-23
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： TOMIMORI KUNIAKI , TAKATSU KAZUO , SUSA MASAAKI , HAGIO AKIRA , NEMOTO MINORU , ODA MITSUGI , TAKAYANAGI KOJI , ISHINO HIROMICHI , SHIROTA AKIO
IPC分类号： B23B41/08

7. 发明专利

JPH02311212A CENTER DRILL FOR BRANCHING LIVE PIPE 失效
公开(公告)号：JPH02311212A
公开(公告)日：1990-12-26
申请号：JP12780489
申请日：1989-05-23
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： TOMIMORI KUNIAKI , TAKATSU KAZUO , SUSA MASAAKI , HAGIO AKIRA , NEMOTO MINORU , ODA MITSUGI , TAKAYANAGI KOJI , NAKAYAMA SEIJI , WAKAMATSU MIKITO
IPC分类号： B23B51/05
摘要： PURPOSE:To securely engage a cut-off piece by locating the horizontal plane of an engaging part end of an engaging projection urged by a spring in the proximal end side of the drill, said end having a generally right-angled triangular section taken along the axis and projecting from the outer peripheral surface of the drill to enlarge the projecting amount from the outer peripheral surface of the drill. CONSTITUTION:A center drill 107 is formed on the end side with a through square hole 109 having a rectangular section taken orthogonally to the drill axis. An engaging projection 110 having a rectangular section and urged by a spring 112 is movably disposed in the through rectangular hole 109, while being disabled from being with drawn. An engaging part 110b of the engaging projection 110 projecting from the outer peripheral surface of the drill 107 has a right-angled triangular section in the axial direction so that the inclined surface 110c of the hypotenuse is inclined toward the end face of the drill and the horizontal surface 110d is located on the proximal end of the drill to enlarge the projecting amount. As the drilling proceeds, the inclined surface 110c is urged by a drilled hole 120 and the engaging projection 110 is drawn in so that a cut-off piece 108 passes through the drill hole to be received by the horizon tal surface 110d.

8. 发明专利

JP2884370B2 失效
公开(公告)号：JP2884370B2
公开(公告)日：1999-04-19
申请号：JP22355590
申请日：1990-08-24
申请人： NIPPON KOKAN KK , NIPPON KOKAN KOJI KK
发明人： NEMOTO MINORU , HAGIO AKIRA , MATSUO ATSUSHI
IPC分类号： F16L1/024

9. 发明专利

JPH04107380A ROD SUPPORT TOOL FOR DEVICE OF RENEWING BURIED PIPE IN NON CUT-AND-COVER METHOD 失效
公开(公告)号：JPH04107380A
公开(公告)日：1992-04-08
申请号：JP22355590
申请日：1990-08-24
申请人： NIPPON KOKAN KK , JAPAN STEEL & TUBE CONSTR
发明人： NEMOTO MINORU , HAGIO AKIRA , MATSUO ATSUSHI
IPC分类号： F16L1/024
摘要： PURPOSE:To prevent the tip of a head from making contact with a rod and to prevent the damage of the head by pivotally mounting the one end of a leg part, composing a support tool, on a rod holding body, and holding the rod holding body to the center of a pipe by means of a running roller located to the leg part. CONSTITUTION:A support tool comprises a pair of rod holding bodies 1 and three leg parts 2 extending from the periphery of a rod holding body 1 to the inner surface of a pipe. The rod holding body 1 comprises a cylinder body 3 having both ends being opened, three rollers 4 arranged in a cylinder body 3, and a spring 5 through the force of which the rollers 4 are energized, and the rollers 4 constrain a rod 104 from three directions. Each leg 2 has an arm 10, a running roller 11 is mounted on the end part of the arm, and the running roller 11 is brought into contact with the inner surface of an existing pipe 103 through the force of a spring 12. The arm 10 is mounted capable of being put in a turning movement on the cylinder body 3 by means of a pivotal fitting part 13. This constitution holds the rod holding body 1 in the center of a pipe and thus, the rod 104 is also held in the center of the pipe.

10. 发明专利

JPH03260490A PIPE FITTING 失效
公开(公告)号：JPH03260490A
公开(公告)日：1991-11-20
申请号：JP5645190
申请日：1990-03-09
申请人： NIPPON KOKAN KK
发明人： HAGIO AKIRA , ONO YOSHIMI , HONMA HIROSHI
IPC分类号： F16L13/00 , F16L13/14
摘要： PURPOSE:To provide a pipe fitting suitable for joining pipes having a relatively small wall thickness by forming an insert to be pressed to the joined pipes in such an arrangement that it consists of a plurality of rings held at a certain spacing with the aid of retainers. CONSTITUTION:A cylindrical driver 1 is made of a shape memory alloy in stainless steel series, while an insert 2 is formed from a plurality of rings 3 of stainless steel which are held at a certain spacing with the aid of retainers 4 interposed between. If the wall thickness of each pipe 10 is represented by (t), the dia. of each ring 3 shall range 1-3t and the thickness of the driver 1 range 2-5t. As a driver the insert 2 is fitted in the cylindrical member 1, and the pipes 10 are inserted from the two sides. The rings are compressed by thermal contracting the dia. of the driver 1 so that they bite into the peripheries of the pipes 10. Thus the peripheries of the pipes 10 are deformed to contribute to prevention of being drawn off, and also sealing is provided by metal touching with the inner surfaces of the rings 3.

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