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81. 发明专利

JPH05346095A 失效
公开(公告)号：JPH05346095A
公开(公告)日：1993-12-27
申请号：JP15497292
申请日：1992-06-15
申请人： TOKYO GAS CO LTD , KAWASAKI STEEL CO
发明人： HAYASHI MITSUTOSHI , FUJITA AKITAKA , NAGASHIMA SHINGO , FUJIMOTO TOMOYA
IPC分类号： E21D9/06 , F16L21/02
摘要： PURPOSE:To prevent the damage of a pipe by providing a double steel pipe having an inner pipe slidably held in an outer pipe through intermediate material, and applying thrust to the outer pipe and intermediate material for propulsion while connecting the end parts in succession. CONSTITUTION:The rear end face of the inner pipe 2' of a propulsion double steel pipe 1' already propelled so as to have its rear end protruded into a shaft is welded to the front end face of the inner pipe 2 of a new propulsion double steel pipe 1. Segments 10 are fitted to a recessed part formed by the outer peripheral surface of the inner pipes 2, 2' and the side faces of concrete 4, 4' as intermediate material. The outer plates of the segments 10 are then welded to the outer pipes 3, 3', and the outer plates of the adjacent segments 10 are mutually welded. Propulsion hydraulic jacks 22 are then set to the rear end of the pipe 1 through a push ring 21, and thrust is applied to the outer pipe and the intermediate material for propulsion. Since thrust is thus applied only to the outer pipe and intermediate material, the collapse of the inner pipe end face and the internal stress of the inner pipe can be prevented, and also the buckling of the outer pipe is prevented. The reliability of pipe burying work can be also improved.

82. 发明专利

JPH05346094A 失效
公开(公告)号：JPH05346094A
公开(公告)日：1993-12-27
申请号：JP15497192
申请日：1992-06-15
申请人： TOKYO GAS CO LTD , KAWASAKI STEEL CO
发明人： HAYASHI MITSUTOSHI , FUJITA AKITAKA , NAGASHIMA SHINGO , FUJIMOTO TOMOYA
IPC分类号： E21D9/06 , F16L21/02
摘要： PURPOSE:To prevent the damage of a pipe by providing a double pipe having an inner pipe slidably held in an outer pipe through a ring member, and applying thrust to the outer pipe while connecting the end parts successively for propulsion, and after propulsion, filling grout to the outer periphery of the connecting parts. CONSTITUTION:The rear end face of the inner pipe 2' of a propulsion double steel pipe 1' already propelled so as to have its rear end protruded into a shaft is welded to the front end face of the inner pipe 2 of a new propulsion double steel pipe 1, and then grout hoses 6, 6' are connected thereto. Segments 10 are fitted to the connecting part outer periphery of the inner pipes 2, 2', and the boundaries 10d to outer pipes 3, 3' and also the mutual segments 10 are welded. Propulsion hydraulic jacks 22 are set to the rear end of the pipe 1 through a push ring 21, and thrust is applied to the pipe 3 for propulsion. After the propulsion and accommodation, cement milk is filled into a space between the ring members 4, 4' of the connecting part while pulling out the hoses 6, 6'. Since thrust is thus applied only to the outer pipe, the collapse of the inner pipe end face and the internal stress of the inner pipe can be prevented, and the buckling of the outer pipe can be prevented. The pipe can be also solidified with fill.

83. 发明专利

JPH04198888A INDUCTION TRANSMISSION TYPE BURIED PIPE DETECTION 失效
公开(公告)号：JPH04198888A
公开(公告)日：1992-07-20
申请号：JP33215490
申请日：1990-11-29
申请人： TOKYO GAS CO LTD , NEC CORP
发明人： NAGASHIMA SHINGO , WASA YASUHIRO
IPC分类号： G01V3/08 , G01V3/10 , G01V3/11
摘要： PURPOSE:To enable highly accurate detection of a buried pipe by a method wherein an output of a magnetic sensor is measured moving a detector horizontally and a phase direction orthogonal to the phase direction is extracted from the output to detect buried pipe depending on a size thereof. CONSTITUTION:A phase direction is measured with respect to a transmitting magnetic field 9 of a magnetic field due to the earth, and then an output of a magnetic sensor 7 is measured moving a detector 1 horizontally in a direction assumed to be that orthogonal to the buried pipe 11 on the surface of the ground at a location where the buried pipe 11 is assumed to be buried. A signal compo nent extracted from an output of the sensor 7 is a constant multiple of the sum of a magnetic field by a current induced in the buried pipe 11 and a direct transmitting magnetic field from a transmitter 2 and is free from effect of the magnetic field due to the earth. Thus, the phase direction is set on a signal processing means 8 to process an output signal of the sensor 7 thereby obtaining such a signal component.

84. 发明专利

JPH102190A PULLING DEVICE OF LEADING BODY AND THRUSTING PIPE 失效
公开(公告)号：JPH102190A
公开(公告)日：1998-01-06
申请号：JP15533796
申请日：1996-06-17
申请人： TOKYO GAS CO LTD , ISEKI TORY TECH INC
发明人： NAGASHIMA SHINGO , NARA KENSUKE , MAKI YUUICHI , OGAWARA TAKASHI , UNO HIDEKI , SATO TORU , SHINDO YUTAKA
IPC分类号： E21D9/06
摘要： PROBLEM TO BE SOLVED: To rationally pull out a leading body and thrusting pipes to the departure shaft when some troubles have arisen in the thrusting process of the pipes. SOLUTION: When a thrusting pipe A in which a steel pipe 2 is fitted to a sheath pipe 1 is connected to a leading body to follow it and thrusted toward an arrival shaft by a pushing device installed at the departure shaft, and when the leading body and the thrusting pipe A are drawn to the departure shaft because of some troubles, an inside sleeve 11 and an outside sleeve 12 in which tapered faces 11b, 12a are oppositely arranged at the end of the steel pipe 2 and fixed to each other are inserted and fastened with nuts 14. One end of a screw rod 13 is inserted in the hole 12b of the outside sleeve 12 and fitted with nuts 15 and the other end thereof is inserted in the hole 6a of the pushing ring 6 and fitted with nuts 15. The pushing ring 6 is retracted to act a force from the smaller diameter side to the larger diameter side on the tapered face 11b of the inside sleeve 11 and the sleeve 11 is contracted to fasten the steel pipe 2 and draw it.

85. 发明专利

JPH09265838A GAS/POWER FEEDING CABLE FOR WELDING MACHINE 失效
公开(公告)号：JPH09265838A
公开(公告)日：1997-10-07
申请号：JP7347496
申请日：1996-03-28
申请人： TOKYO GAS CO LTD , HITACHI ENG SERVICE
发明人： NAGASHIMA SHINGO , MAKI YUUICHI , MIZUKAMI SEIJI , MIBU IKUO , ITO KOJI
IPC分类号： B23K9/16 , B23K9/32 , H01B7/00
摘要： PROBLEM TO BE SOLVED: To enhance the efficiency of automatic welding of a pipe circumference, etc., by reducing the weight of the gas/power feeding cable of a welding machine. SOLUTION: This gas/power feeding cable 15 for a welding machine is for use in the welding machine which performs arc welding in the presence of shield gas, and comprises a gas hose 30 made from an insulating material and a power cable consisting of conductors 32 placed around the outer periphery of the gas hose 30. Since the gas feeding hose and the power feeding cable are provided concentric with each other and combined into one gas/power feeding cable, slender, lightweight cables can be employed, and the number and weight of gas/power feeding cables can be reduced.

86. 发明专利

JPH09262675A RIGHT AND LEFT ARC COPY CORRECTING METHOD FOR PIPE CIRCUMFERENTIAL AUTOMATIC WELDING EQUIPMENT 失效
公开(公告)号：JPH09262675A
公开(公告)日：1997-10-07
申请号：JP7403396
申请日：1996-03-28
申请人： TOKYO GAS CO LTD , HITACHI ENG SERVICE
发明人： NAGASHIMA SHINGO , MAKI YUUICHI , MIZUKAMI SEIJI , MIBU IKUO , MAEDA KENICHI
IPC分类号： B23K9/173 , B23K9/028 , B23K9/12 , B23K9/127
摘要： PROBLEM TO BE SOLVED: To provide a right and left arc copying corrective method capable of highly accurately controlling a pipe circumferential automatic welding equipment to perform the circumferential automatic welding of steel pipes while performing the weaving at high speed. SOLUTION: In welding the whole circumference of end faces of two pipes which are butted and fixed to each other by the pulse MAG welding method, the weaving of a torch is performed at least in the direction orthogonal to the tangential line of the pipe circumference (in the right-to-left direction) along grooves of the pipes. Based on the measured pulse welding current 13, the left current value for the left section and the right current value for the right section in one period of the weaving are individually obtained (128), and the weaving is controlled (129, 130) so that the weaving center of the torch is deviated by the corrective quantity according to the difference between both current values in the direction to eliminate the difference based on the difference between the current values.

87. 发明专利

JPH09262664A CIRCUMFERENCE AUTOMATIC WELDING METHOD 失效
公开(公告)号：JPH09262664A
公开(公告)日：1997-10-07
申请号：JP7347796
申请日：1996-03-28
申请人： TOKYO GAS CO LTD , HITACHI ENG SERVICE
发明人： NAGASHIMA SHINGO , MAKI YUUICHI , MIZUKAMI SEIJI , MIBU IKUO , MAEDA KENICHI
IPC分类号： B23K9/173 , B23K9/028 , B23K37/02
摘要： PROBLEM TO BE SOLVED: To provide a two head system circumference automatic welding method which shortens the waiting time in order to avoid the interference of two stands of welding head and which improves the welding efficiency on the result. SOLUTION: Two rails (guide rails, 3, 7) are arranged on the both sides of inserting a circumference welding line (groove 5). Then, each one stand of welding head 11, 21 is mounted on every rail 3, 7, and the groove 5 is welded while co-operating these welding heads 11, 12. Because two stands of the heads 11, 21 are mounted on the separated rails 3, 7, the interference of both heads is generated only at the part of welding torch 17, 27. On the result, the dimension of machinery as the target of interference is made smaller than the conventional and the interference avoiding distance is also made remarkably small.

88. 发明专利

JPH09253888A PIPE INNER CLAMP DEVICE 失效
公开(公告)号：JPH09253888A
公开(公告)日：1997-09-30
申请号：JP7194896
申请日：1996-03-27
申请人： TOKYO GAS CO LTD , HITACHI ENG SERVICE
发明人： NAGASHIMA SHINGO , MAKI YUUICHI , MIZUKAMI SEIJI , MIBU IKUO , ITO KOJI
IPC分类号： B23K37/053 , B23K9/035 , B23K37/06
摘要： PROBLEM TO BE SOLVED: To provide a pipe inner clamp device free from any chipped parts in a backing of a weld zone, and capable of improving the welding quality. SOLUTION: A pipe inner clamp device 1 fixes two pipes 3, 7 to be butted to each other at end parts from the inner side of the pipes. The pipe inner clamp device is provided with a plurality of clamp pads 51 which can be pressed against the inner surface of the butted end parts of two pipes 3, 7, are split in the circumferential direction and also used as backings, and cotter pads 131 which are inserted in the clearances between the split clamp pads 51 as a part of the backings to the inner surface of the pipe end parts. In the inner clamp device, the clamp pads 51 (or coffer pads 131) which are also used as the backings are present over the whole circumference of the pipe end face butted parts (the back side of the root gap) without clearance. Thus, the permanent welding can be continuously achieved in the clamped condition, and the working efficiency is also improved. The welding quality is also improved because no chipped parts are present in the backings.

89. 发明专利

JPH09253861A CABLE CONNECTION METHOD OF AUTOMATIC WELDING EQUIPMENT 失效
公开(公告)号：JPH09253861A
公开(公告)日：1997-09-30
申请号：JP7195396
申请日：1996-03-27
申请人： TOKYO GAS CO LTD , HITACHI ENG SERVICE
发明人： NAGASHIMA SHINGO , MAKI YUUICHI , MIZUKAMI SEIJI , MIBU IKUO , ITO KOJI
IPC分类号： B23K9/32 , B23K9/10 , B23K9/12
摘要： PROBLEM TO BE SOLVED: To realize combination and common use of a cable between a welding head and a control device, to reduce the size and weight of a whole control cable. SOLUTION: In the cable connection method of an automatic welding equipment, a welding head 3 to achieve the automatic welding while a welding torch is traveled along the weld seam, a control device 2 of the welding head, a cable 10 connected between the welding head 3 and the control device 2 are provided. Each cable assembly and distribution part 12 is provided on the welding head 3 and the control device 2, and a collected control cable 10 to one line is provided between the cable assembly and distribution parts 12.

90. 发明专利

JPH09253853A WEAVING METHOD IN ARC WELDING 失效
公开(公告)号：JPH09253853A
公开(公告)日：1997-09-30
申请号：JP6783896
申请日：1996-03-25
申请人： TOKYO GAS CO LTD , HITACHI ENG SERVICE
发明人： NAGASHIMA SHINGO , MAKI YUUICHI , MIZUKAMI SEIJI , MIBU IKUO , ITO KOJI
IPC分类号： B23K9/022 , B23K9/095 , B23K9/12 , B23K9/127
摘要： PROBLEM TO BE SOLVED: To improve fusion of a groove wall part at a toe part, prevent occurrence of defective fusion and blow holes at a part to be welded, and to form a bead flat. SOLUTION: The weaving width is increased over a toe part (a bead toe part) in the width direction of a bead surface 1 of a preceding welding pass which is already present in a groove, and along the slope of a groove wall 2 while a welding torch 3 is elevated/lowered, and the weaving speed is changed at a part (a bead part) on the preceding bead, and a slope part of the groove wall 2. The groove wall 2 can be appropriately fused.

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