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61. 发明专利

JPH06210484A METHOD AND JIG FOR RADIOGRAPHIC-TESTING WELDED PART OF TUBE CIRCUMFERENCE 失效
公开(公告)号：JPH06210484A
公开(公告)日：1994-08-02
申请号：JP384893
申请日：1993-01-13
申请人： TOKYO GAS CO LTD , TOKYO RIGAKU KENSA KK , KAWASAKI STEEL CO
发明人： HAYASHI MITSUTOSHI , FUJITA AKITAKA , NAGASHIMA SHINGO , ARAI YUTAKA , FUJIMOTO TOMOYA
IPC分类号： B23K31/00 , G03B37/00 , G03B42/02
摘要： PURPOSE:To provide a radiographic testing method for a welded part of a tube circumference and a radiographic testing jig by which a clear radiography can be obtained over the total range of a welded part with a simple operation and the quality of the welded part can accurately be judged whether it is normal or defective. CONSTITUTION:A radiographic inspection jig 10 provided with a cylindrical body 12 freely inserting into two pieces of tubes 42, 44, and two annular X-ray shielding plates 14, 16 attached by separating a definite interval on an outer circumferential surface of this cylindrical body 12 are prepared, radiation films 26a-26d are arranged to be mutually opposed to the welded part 40 and the radiography of this welded part 40 is photographed thereafter, the radiation films 24a-24d are arranged to be mutually opposed to the welded part 40, and the radiography of the welded part 40 is photographed from the position different from the position where the radiation films 26a-26d are photographed.

62. 发明专利

JPH05139291A PEG CONNECTING PART SEALING STRUCTURE FOR INSPECTION PEG 失效
公开(公告)号：JPH05139291A
公开(公告)日：1993-06-08
申请号：JP31074791
申请日：1991-11-26
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： HONMA HIROSHI , FUJISAWA TOMOJI , FUJITA AKITAKA , KOBORI TAKASHI
IPC分类号： B08B9/053 , B08B9/04 , B61B13/10 , F16J15/16 , G01D21/00 , G01N29/04 , G01N29/26
摘要： PURPOSE:To enable unforced passage through a seal member and a bent pipe part by providing a flexible and airtight seal member around a coil spring connector, then applying lining, wear resistant and small in frictional resistance with plural holes formed therein, to the outer face of the seal member, and filling flexible and airtight material inside the coil spring connector. CONSTITUTION:A cylindrical seal member S possessing flexible and airtightness is provided around a coil spring connector 1, and this seal member S is formed by overlapping a body part 2, larger in its outer diameter than the inner diameter of an inspected steel pipe, and an auxiliary part 3 in the longitudinal direction. Packing material 6 possessing flexibility and airtightness is filled inside the coil spring connector 1. Lining 4 made of urethane rubber or the like wear resistant and small in frictional resistance is applied to the surface of the seal member S in order to reduce frictional resistance and improve durability. Plural holes 5 of approximately 30-40mm in diameter are formed in the lining 4 as air vent holes at the compressed time and for the purpose of improving the flexibility of the seal member S.

63. 发明专利

JPH04208668A INSPECTING PIG WHOSE TRUNK BODY CAN BE SET ECCENTRIC 失效
公开(公告)号：JPH04208668A
公开(公告)日：1992-07-30
申请号：JP34061090
申请日：1990-11-30
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： FUJISAWA TOMOJI , HONMA HIROSHI , FUJITA AKITAKA
IPC分类号： G01B17/02 , B08B9/04 , B08B9/053 , B61B13/10 , G01N29/04 , G01N29/26
摘要： PURPOSE:To permit the reasonable passing in the bent tube part of an inspecting pig by allowing a trunk body to freely shift in eccentric form in the radial direction in which an external force acts, for the flanges at both the edge parts of the pig shaft, when the external force in the radial direction acts on the trunk body, during the passing in the bent tubular part having a small radius of curvature. CONSTITUTION:A plurality of copying devices 15 are installed in symmetry in the axial direction on the outer periphery of an inspecting pig trunk body 7 having the first flanges 1 fixed at the front and rear parts, and the edge part of the copying device 15 is directed in the radial direction and supported by a spring. Further, the third flanges 3 are fixed at both the edges of an inspecting pig shaft 10, and a cup C is fixed on the outside of the third flange 3. The second flange 2 is interposed between the first and third flanges 1 and 3, and coil springs 5 and 6 are interposed between the first and second flanges 1 and 2 and between the third and second flanges 3 and 2, respectively, and the first and third flanges 1 and 3 can be slided vertically for the second flange 2. Accordingly, when an external force F acts, the force is received by the copying device 15, and the trunk body 7 can be set eccentric for the pig shaft 10 by pushing the trunk body 7 downward.

64. 发明专利

JPH03117798A PARTIAL MENDING METHOD FOR PIPE LINE FROM INSIDE THEREOF AND MENDING MATERIAL USED IN MENDING METHOD THEREFOR 失效
公开(公告)号：JPH03117798A
公开(公告)日：1991-05-20
申请号：JP25295389
申请日：1989-09-28
申请人： TOKYO GAS CO LTD , ASHIMORI IND CO LTD
发明人： FUJITA AKITAKA , HYODO MASAKATSU , IMOTO TAKAYOSHI , SAKURAGI HIROYUKI
IPC分类号： F16L55/16 , B05C7/08
摘要： PURPOSE:To suppress corrosion of a corroded hole by inserting, into a pipe a mending material with a hot melt layer formed on a sheet material of sheet molding compound, attempting to melt the hot melt layer by means of heating, making the molten material invade into the corroded hole, and hardening the same. CONSTITUTION:A hot melt layer 3 is formed on one face of the sheet material 2 of sheet molding compound so as to form a mending sheet 1. The mending sheet 1 is bent in a circle with the hot melt layer 3 facing outside, and inserted into a pipe line 12. The mending sheet 1 is expanded in its radial direction and brought in close contact with the inner surface of the pipe line 12. Heat is given to the mending sheet 1, so as to melt the hot melt layer 3, the hot melt is made to invade into a mend position 13, and hardened. As the result, together with keeping airtightness of the pipe body, corrosion of a corroded hole or a crack and the like can be suppressed.

65. 发明专利

JPH03114567A DEVICE FOR PARTIAL REPAIRING OF DUCT LINE FROM INNER FACE THEREOF 失效
公开(公告)号：JPH03114567A
公开(公告)日：1991-05-15
申请号：JP25295489
申请日：1989-09-28
申请人： TOKYO GAS CO LTD , ASHIMORI IND CO LTD
发明人： FUJITA AKITAKA , IMOTO TAKAYOSHI , SAKURAGI HIROYUKI , TAKEBE SHINICHI
IPC分类号： F16L55/16 , B05C7/08 , B29C63/34 , B29L23/00
摘要： PURPOSE:To prevent rupture by fitting an expanded film to the outer circumference of the drum body part of a repairing tool main body and also covering the outside of the expanded film with a regulation film. CONSTITUTION:The drum body part 1' of a repairing device main body 1 is covered by an expanded film 4 made of rubber material which is dispersed with conductive particles such as carbon black and causes heat release due to conduction of electricity. Furthermore the expanded film 4 is covered by a cylindrical knitted web 6. Both ends of the knitted web 6 are fixed to the outer circumference of the drum body part 1' together with both ends of the expanded film 4 by the fixing members 7, 7'. An energized wire 9 is connected with the electrodes 5, 5' positioned to both ends of the expanded film 4. Compressed air is injected to the gap of the expanded film 4 and the drum body part 1' from a fluid pressure injection port 8. Thereby such possibility is prevented that the impurities are mixed with fluid in a duct line and also safety can be enhanced.

66. 发明专利

JPH01279198A METHOD FOR PARTLY REPAIRING PIPE CONDUIT FROM ITS INTERNAL SURFACE 失效
公开(公告)号：JPH01279198A
公开(公告)日：1989-11-09
申请号：JP10799288
申请日：1988-04-29
申请人： TOKYO GAS CO LTD , ASHIMORI IND CO LTD
发明人： MORI KUNIHIRO , FUJITA AKITAKA , SAKURAGI HIROYUKI , TAKEBE SHINICHI
IPC分类号： F16L55/16 , B29C63/26 , F16L1/00
摘要： PURPOSE:To enable repair to be performed with no use of an adhesive agent by inserting a repairing sleeve, which forms in its external surface a rubber or resin layer able to foam and in an unfoamed condition, into a pipe to its repaired part to be heated thereafter. CONSTITUTION:A repairing sleeve 5, having rigidity and forming in its external surface a resin or rubber layer 7 able to foam and in an unfoamed condition, is inserted into a pipe 1 to its location of a pin hole 2 and heated. Thus because the resin or rubber layer 7 foams fixing the repairing sleeve 5 to an internal surface of the pipe 1, it can be repaired without using an adhesive agent.

67. 发明专利

JPH01139238A REPAIR OF PIPELINE BY LINING 失效
公开(公告)号：JPH01139238A
公开(公告)日：1989-05-31
申请号：JP29860787
申请日：1987-11-25
申请人： TOKYO GAS CO LTD , ASHIMORI IND CO LTD
发明人： FUJITA AKITAKA
IPC分类号： B29C63/34
摘要： PURPOSE:To make it possible to repair a pipeline by lining while permitting a gas or the like to flow through the pipeline and with only one excavation site for the work, by pressing a wedge into a trapezoid or triangular notched part provided in a repairing cylinder to enlarge the diameter of the cylinder, thereby fixing the cylinder in pressure contact with the inner surface of the pipeline. CONSTITUTION:A repairing cylinder 1 is formed by circularly curving a metallic elastic material, providing both ends of the curved material with triangular (or trapezoid) notched parts 10, and providing the notched parts 10 with wedge guides 15. A wedge 2 is provided with a curvature approximately equal to the curvature of a pipe, and is shaped substantially in conformity with a taper 10' of the notched parts 10 of the cylinder 1, the resultant taper 2' being provided with a guide 2'' to be engaged with the wedge guide 15 of the cylinder 1. The tip of the wedge 2 is engaged with the inlet of the notched part 10 of the cylinder 1; the assembly is fitted to a pressing unit 3, and is inserted to an objective position in a pipeline (a), where the wedge 2 is pressed into the notched part 10 to enlarge the diameter of the cylinder 1, thereby fixing the cylinder 1 in pressure contact with the inner surface of the pipeline (a).

68. 发明专利

JPS6483996A METHOD AND DEVICE FOR PARTIALLY REPAIRING DUCT FROM INNER SURFACE THEREOF 失效
公开(公告)号：JPS6483996A
公开(公告)日：1989-03-29
申请号：JP24037987
申请日：1987-09-24
申请人： TOKYO GAS CO LTD , ASHIMORI IND CO LTD
发明人： YAMAGISHI KAZUO , FUJITA AKITAKA , HYODO MASAKATSU , IMOTO TAKAYOSHI , SHIMOKAWA SHINJI , SAKURAGI HIROYUKI
IPC分类号： F16L55/16
摘要： PURPOSE: To repair a pipeline without using an adhesive agent by selecting a material of low melting point which has rigidity at the normal temperature for a repairing sleeve, inserting the material into the pipeline, heating the material, and widening a diameter of the sleeve. CONSTITUTION: A repairing sleeve 16, which has a diameter smaller than an inner diameter of a pipeline, is previously mounted on a repairing device. The repairing sleeve 16 has rigidity at the normal temperature, and is formed from a material that becomes softened and extendable by heating at relatively low temperature. When a rubber heater 8 generates heat, the repairing sleeve 16 is heated through an expansion layer 4. When the repairing sleeve 16 can be widen in its diameter, fluid pressure is supplied through a fluid pressure conduit 7 and a pouring hole 6 into the expansion layer 4 to expand the expansion layer 4. Corresponding with in its the expansion of the expansion layer 4, the repairing sleeve 16 is uniformly widened the diameter to a longitudinal direction, and soon a point appearing a pinhole 13 is sealed from an inner surface of the pipeline 12.

69. 发明专利

JPS6447530A METHOD FOR REPAIRING OF PIPELINE LINING 失效
公开(公告)号：JPS6447530A
公开(公告)日：1989-02-22
申请号：JP20573387
申请日：1987-08-19
申请人： TOKYO GAS CO LTD
发明人： FUJITA AKITAKA
IPC分类号： B29C63/36 , F16L55/16
摘要： PURPOSE:To reduce lining time and cost, by inserting a flexible repairing rube having an adhesive applied to the inner surface thereof and a predetermined length in a pipeline in such a state that only one end part thereof is reversed preliminarily and enlarging the diameter of the reversal part to bond said part to the inner surface of the pipeline to move a reversal roller through the pipeline. CONSTITUTION:When a non-reversal repairing tube 1 is mounted to a lining unit 3 outside a pipeline (a) by a support roller 9, the repairing tube 1 is preliminarily held by a roller press 8 in such a state that a part of the end of said tube is reversed on the side of the reversal roller 7. After the repairing tube 1 is set to the lining unit 3, an opening jig 10 is once inserted in the pipeline (a) up to the place slightly deeper than the leak place P of the pipeline (a) to be drawn. Whereupon, the roller press 8 slides in the left direction and an arm 6 is opened by the force of a spring 11 to bond the reversal part 1a of the repairing tube 1 to the inner surface of the pipeline (a). In this state, when the insert shaft 4 is gradually moved in the left direction, the repairing tube 1 is bonded to the inner surface of the pipeline (a) under pressure while reversed. Protective paper 12 is released of itself while being drawn by the roller press 8.

70. 发明专利

JPH09133283A PIPELINE INSPECTING RADIATION EXPOSURE DEVICE 失效
公开(公告)号：JPH09133283A
公开(公告)日：1997-05-20
申请号：JP29117295
申请日：1995-11-09
申请人： ISHIKAWAJIMA INSPECTION & INST , TOKYO GAS CO LTD
发明人： NAKAMURA HIDEYUKI , OGA JOTARO , NAGASHIMA SHINGO , FUJITA AKITAKA
IPC分类号： G01N23/02 , F16L55/00 , F17D5/02 , G21K5/02
摘要： PROBLEM TO BE SOLVED: To make it possible to detect angle of turning of a radiation exposure tube without visual recognition by always vertically suspending a weight, which is supported by a radiation aiming tube freely to be turned, under a turning center axis of the radiation exposure tube, and detecting the angle of turning of the radiation exposure tube with an angle detecting device on the basis of the direction of the weight. SOLUTION: In the case of inspecting the transmission of the radiation of a welding line of a pipeline, a turning center axis 19 is provided in the center of turning of a radiation exposure tube 6 freely to be turned, and one end of a weight 20, which is formed so that the position of center of gravity is separated from the turning center shaft 19, is fixed to the turning center shaft 19. An angle detecting device 21 such as an absolute encoder, of which center is arranged in the turning center shaft 19, is fixed to the radiation aiming tube 16 between the front surface of the radiation exposure tube 6 and the weight 20. Since the weight 20 is always vertically suspended under the turning center shaft 19, direction of a radiation port 12 can be detected by detecting the relative turning angle between the turning center shaft 19 and the radiation aiming tube 6 with the angle detecting device 21 and inputting the detected angle to a control device 17.

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