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1. 发明专利

JPH0814471A PRIME ARRANGING FILLET CAP CONSTRUCTION METHOD 失效
公开(公告)号：JPH0814471A
公开(公告)日：1996-01-16
申请号：JP14464394
申请日：1994-06-27
申请人： TOKYO GAS CO LTD , NIPPON STEEL CORP
发明人： TAGUCHI YOSHIMITSU , OSHIMA AKIRA , KUMAGAI YOSHIHIRO , IGA SHUNICHI , TANAKA ISAO , SUZUKI SHOJI , MASAGUCHI YOUJI
IPC分类号： F16L55/10
摘要： PURPOSE:To prevent take fire to gas in a gas flow pipe at welding time without executing a nitrogen gas injecting process, by performing welding a fillet cap against a cut end part of the gas flow pipe in a condition that inside the gas flow pipe is exhausted further to seal an outflow of gas in the gas flow pipe by a heat resistant seal member. CONSTITUTION:In the case of fixedly welding a fillet cap 4 in the cut end part periphery of a steel pipe-made main pipe 1, a diffusion pipe 2 is connected to the main pipe 1, to insert a rubber ball 3 (3a, 3b) into the main pipe 1 from this diffusion pipe 2. In a condition that each rubber ball 3 is inflated to temporarily close the main pipe 1, a heat resistant seal member 11 is interposed between itself and a cut end face 1d, to fit a fillet cap 4 to the cut end part periphery. Next by using screw bars 8... and nuts 9... equally arranged in a circumferential direction relating to a fixe band 7 fixed to the cut end part periphery, the cap 4 is uniformly pressed to the cut end face 1d by a pressing plate 10. Thereafter, the temporarily closed condition by the rubber ball 3 is released to exhaust air in the pipe, and the cap 4 is welded to the main pipe 1.

2. 发明专利

JPH06182872A PREVENTING METHOD FOR PARTIAL CORROSION OF STEEL TUBE 失效
公开(公告)号：JPH06182872A
公开(公告)日：1994-07-05
申请号：JP34248192
申请日：1992-12-22
申请人： NIPPON STEEL CORP , TOKYO GAS CO LTD
发明人： MIYAMOTO YUKINOBU , YAMAGUCHI KENICHI , CHIKADA KYOJI , SASAKI NOBUHIRO , SUZUKI SHOJI
IPC分类号： B29C63/06 , F16L58/02
摘要： PURPOSE:To provide a method for heating a hat shrinkable coating material to form an excellent corrosion preventing coating having no burning deterioration and no unadhering part to an outer surface of the tube at a joint or a damaged part of the coating of a steel tube. CONSTITUTION:A heat shrinkable coating material 4 is wound on an outer surface 1 of a tube and a factory coating part 3, and its periphery is coated with a heat generator 5 made of a heat shrinkable sheet in which an electric heating wire 6 is sealed. The wire of the generator is energized to the coating material thereby to adhere the coating material to the outer surface of the tube.

3. 发明专利

JPH01227968A MEASURING METHOD FOR INSULATION RESISTANCE OF INSULATED JOINT FOR BURIED PIPE LINE 失效
公开(公告)号：JPH01227968A
公开(公告)日：1989-09-12
申请号：JP5365788
申请日：1988-03-09
申请人： NIPPON STEEL CORP
发明人： KAWAKAMI MAKOTO , SUZUKI SHOJI
IPC分类号： G01R27/02
摘要： PURPOSE:To accurately evaluate the performance of an insulated joint without being influenced by metal pipes by constituting a bridge circuit with 1st, 2nd metal pipes, variable resistor, grounding pole and reference electrode, and adjusting this variable resistor. CONSTITUTION:The insulated joint 3 is connected between the 1st and 2nd metal pipes 1, 2. One terminal of the variable resistor 4 is connected to the 1st metal pipe 1, and another terminal is connected to the grounding pole 5, then an electrode 6 is connected between the 2nd metal pipe 2 and the grounding pole 5. Further, between the reference electrode 8 inserted into the earth and each of the 1st metal pipe, 2nd metal pipe and the grounding pole 5, potentiometers 9, 11, 10 are connected respectively, thereby the bridge circuit is constituted. With this arrangement, the performance of the insulated joint can be accurately evaluated without being influenced by the metal pipes by means of measuring the insulation resistance of the insulated joint 3 from a balancing condition obtained by adjusting the variable resistor 4.

4. 发明专利

JP2003004687A Method for detecting damaged location in corrosion-proof coating of embedded metal pipes using two type of frequency signal 有权
标题翻译：使用两种频率信号检测嵌入式金属管道腐蚀防腐涂层位置的方法
公开(公告)号：JP2003004687A
公开(公告)日：2003-01-08
申请号：JP2001190748
申请日：2001-06-25
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OHIRA TAKASHI , SUZUKI SHOJI , SASAKI NOBUHIRO , KAWAKAMI MAKOTO , OBA NOBUO
IPC分类号： G01V3/02 , G01N27/20 , G01V3/12
摘要： PROBLEM TO BE SOLVED: To provide a method for detecting a damaged location in a corrosion- proof coating of embedded metal pipes capable of heightening work efficiency, reducing cost, and accurately knowing the damaged location in the coating. SOLUTION: A signal current is passed between a damaged part 3 in the coating of the metal pipe 2 embedded in the ground to which the corrosion-proof coating 1 is applied and a counter electrode 5 embedded in the ground 4 from a measuring signal transmitter 6. The potential difference of a ground surface is detected by each of wheel electrodes 10 in a receiving device 9 to detect damage in this method for detecting the damaged location in the corrosion-proof coating in the embedded metal pipe. Two types of different carrier-frequency signal currents are simultaneously supplied across the embedded metal pipe 2 and the embedded counter electrodes 5 and 7, and the signals of the two types of frequency components detected by the receiving device 9 are compared with each other to determine the damaged part 3 in the coating.
摘要翻译：要解决的问题：提供一种用于检测嵌入式金属管的防腐蚀涂层中的损坏位置的方法，其能够提高工作效率，降低成本，并准确地知道涂层中的损坏位置。解决方案：信号电流在嵌入到防腐涂层1的地面的金属管2的涂层中的损坏部分3和从测量信号发射器6嵌入地面4中的对电极5之间通过通过接收装置9中的各个车轮电极10检测地面的电位差，以检测该方法中用于检测嵌入金属管中的防腐蚀涂层中的损坏位置的损坏。在嵌入式金属管2和嵌入式对置电极5和7之间同时提供两种类型的不同的载波频率信号电流，并且将由接收装置9检测的两种类型的频率分量的信号彼此进行比较，以确定涂层中的损坏部分3。

5. 发明专利

JP2003004686A Method for detecting damaged location in corrosion-proof coating of embedded metal pipes using integrating means 有权
标题翻译：使用集成方法检测嵌入式金属管道腐蚀涂层中的损坏位置的方法
公开(公告)号：JP2003004686A
公开(公告)日：2003-01-08
申请号：JP2001189099
申请日：2001-06-22
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KOGA RYUJI , SUZUKI SHOJI , MASAGUCHI YOJI , KAWAKAMI MAKOTO
IPC分类号： G01V3/02 , G01N27/20
摘要： PROBLEM TO BE SOLVED: To provide a method for detecting a damaged location in a corrosion-proof coating in embedded metal pipes capable of facilitating measuring work, eliminating restrictions on a measuring range and a location, and highly accurately knowing the damaged location in the coating. SOLUTION: An A.C. signal current is passed between a damaged part 3 in the coating of the metal pipe 2 embedded in the ground to which the corrosion-proof coating 1 is applied and a counter electrode 5 embedded in the ground 4 from a measuring signal transmitter 6. The potential difference of a ground surface between two electrodes is detected by wheel electrodes 8 in a receiving device 7. A ground surface potential which occurs from the damage in the coating of the embedded pipe is detected to detect the damage in the device for detecting the damaged location in the corrosion-proof coating in the embedded metal pipe 2. The receiving device 7 is provided with an integrating circuit 12 for integrating the sine or cosine of the ground surface potential difference. The distribution of the ground surface potential obtained by the integration is displayed on a display device 13. From changed in the waveform thereof, the damaged location in the corrosion-proof coating 1 is detected.
摘要翻译：要解决的问题：提供一种用于检测嵌入金属管中的耐腐蚀涂层中的损坏位置的方法，其能够便于测量工作，消除对测量范围和位置的限制，并且高度准确地知道涂层中的损坏位置。解决方案：交流信号电流在嵌入到防腐涂层1的地面的金属管2的涂层中的损坏部分3和从测量信号发射器嵌入地面4中的对电极5之间通过两个电极之间的地表面的电位差由接收装置7中的车轮电极8检测。检测从嵌入管的涂层中的损坏发生的地表面电位，以检测装置中的损坏检测嵌入式金属管2的防腐蚀涂层中的损坏位置。接收装置7设置有用于积分地表电位差的正弦或余弦的积分电路12。通过积分获得的地表面电位的分布被显示在显示装置13上。从其波形的变化中，检测防腐蚀涂层1中的损坏位置。

6. 发明专利

JPH08193304A TEMPORARY BURYING METHOD FOR HOLE EXCAVATED FOR LAYING BURYING PIPE 失效
公开(公告)号：JPH08193304A
公开(公告)日：1996-07-30
申请号：JP1990595
申请日：1995-01-13
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI KUNIYOSHI , TAKEMASA SHIGEO , YOSHIGAI KOJI , SUZUKI SHOJI
IPC分类号： E01C9/08
摘要： PURPOSE: To make installation and removal of temporary burying materials easy, and to certainly support load of vehicles traveling on a road by using closed cell foam resin blocks as the temporary burying materials. CONSTITUTION: One or a plurality of blocks made of closed cell foam resin are installed as lower temporary burying layers around the pipe end 3a in an excavated hole 1 in a pipe burying work. A plurality of sand bags 5a are laid as middle temporary burying layers 5 on the lower temporary burying layers. A net 7 is laid on the middle temporary burying layers 5, and a flexible, water-permeable sheet 8 is laid on the net 7. Then, filling with earth and sand 6a is made on the sheet 8 to form an upper temporary burying body 6.

7. 发明专利

JPH06229845A METHOD AND DEVICE FOR EVALUATING STRESS OF STEEL PIPE 失效
公开(公告)号：JPH06229845A
公开(公告)日：1994-08-19
申请号：JP1428693
申请日：1993-01-29
申请人： NIPPON STEEL CORP
发明人： OKAMOTO MASAYUKI , KIKUCHI TOSHIJI , SUZUKI SHOJI , TSUJIMOTO JUN
IPC分类号： G01L1/00 , G01L1/25 , G01N23/20
摘要： PURPOSE:To evaluate the degree of fatigue of a buried steel pipe in a short time by fitting a small-sized X-ray stress measuring instrument united with a scanning jig in one body to the buried steel pipe and directly detecting crystal distortion of the steel pipe in the axial and circumferential directions by scanning the corrosion resisting film of the steel pipe in the circumferential direction. CONSTITUTION:A small-sized X-ray stress measuring instrument 2 united with a scanning jig 1 in one body is contracted by turning a handle 9 and a steel wheel 11, elastic wheel 12, and elastic driving wheel 13 supported by a bracket 7 are brought into contact with the corrosion resisting film of a small-diameter steel pipe 5. The wheel 11 maintains the measuring distance of the instrument supported by a table 15 at a fixed value and the wheel 13 drives and stops the jig 1 in the circumferential direction of the steel pipe 5. The instrument 2 detects 18 diffracted X-rays 17 from the part of the pipe 5 where the corrosion resisting film comes off from the pipe 5. Since the instrument 2 is provided with a frame inclined by sin psi, the stress of the pipe 5 in the axial direction can be found by a parallel inclination method and the integration width of the stress of the pipe 5 in the circumferential direction or diffracted X-rays are found by an inclination method. Then an arithmetic device 4 collates the stress or integrated width with a master curve (integration width versus fatigue) and displays 13 the degree of fatigue of the pipe 5.

8. 发明专利

JPH0894481A GAS LEAK DETECTION METHOD FOR EMBEDDED PIPE 失效
公开(公告)号：JPH0894481A
公开(公告)日：1996-04-12
申请号：JP22780394
申请日：1994-09-22
申请人： NIPPON STEEL CORP , TOHO GAS KK
发明人： MORI KATSUHIRO , YOSHIDA KOTARO , TSUJIMOTO JUN , SUZUKI SHOJI , YOKOMURA SHIGEKI , MIZUNO ATSUSHI , MARUYAMA TAKASHIGE , AKITA MASANORI , HOSONO KAZUHIRO
IPC分类号： G01N29/04 , F17D5/06 , G01M3/24
摘要： PURPOSE: To obtain a method for detecting a gas leaking part of new and existing embedded pipe. CONSTITUTION: A detection pipe 3 filled with liquid is laid along the longitudinal direction of an embedded pipe 2 covered with water closely to the outside thereof. A submersible microphone is inserted into the detection pipe 3 and moved through the detection pipe 3 thus detecting leakage of gas from the embedded pipe 2. Only the specific frequency components (e.g. 1-5kHz) of the sound containing noise caught by the submersible microphone are passed to a signal processor where it is processed to detect gas leakage from the embedded pipe 2.

9. 发明专利

JPS6191541A Test method and apparatus for promoting corrosion undercover 失效
标题翻译：用于促进腐蚀的试验方法和装置
公开(公告)号：JPS6191541A
公开(公告)日：1986-05-09
申请号：JP21272084
申请日：1984-10-12
申请人： Nippon Steel Corp
发明人： SUZUKI SHOJI , TANIGUCHI YASUYUKI , TSUBAKI TOSHIO , TANIGAWA KENICHI , KAWASAKI HIRONOBU
IPC分类号： G01N17/00
CPC分类号： G01N17/00
摘要： PURPOSE:To enable the forecasting with the reliability almost equivalent to the actual situation, by exposing a covered metal material to a heating corrosion medium balanced with an atmospheric gas having a higher oxygen partial pressure than the atmospheric air. CONSTITUTION:A test piece 1 is supported by a test piece support means 4 in a medium tank 3 holding a corrosion medium 2. The medium tank 3 is set in a thermostatic cell 5 with which the corrosion medium 2 is kept at a constant temperature, where the corrosion medium 2 comes in contact with an atmospheric gas 6 with a counterflow device 7 so that the atmospheric gas 6 is allowed to be balance dissolved in the corrosion medium 2. The counterflow device 7 feeds the medium 2 to the medium tank 3 through a medium discharge tube 9 provided in the medium tank 3 by way of a reflax means such as pump. The use of such an apparatus enables the forecasting of the long-term durability of the anti-corrosive cover.
摘要翻译：目的：为了实现几乎等同于实际情况的可靠性的预测，通过将覆盖的金属材料暴露于与大气压力高于大气的气氛气体平衡的加热腐蚀介质上。构成：试验片1由保持腐蚀介质2的介质槽3中的试验片支撑装置4支撑。中等槽3设置在恒温槽5中，腐蚀介质2保持在恒温状态，其中腐蚀介质2与具有逆流装置7的大气气体6接触，使得气氛气体6被允许平衡溶解在腐蚀介质2中。逆流装置7将介质2通过中间放电管9，其通过诸如泵的反射装置设置在介质槽3中。使用这种装置能够预测防腐盖的长期耐用性。

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