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1. 发明专利

JP2005095948A Method for improving residual stress of piping 有权
标题翻译：改善管道残余应力的方法
公开(公告)号：JP2005095948A
公开(公告)日：2005-04-14
申请号：JP2003334503
申请日：2003-09-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AOIKE SATOSHI , ENOMOTO KUNIO , SUGANO SATOSHI , ISHIWATARI MASAYUKI , HISATSUNE SHINICHI , ORITANI NAOHIKO
IPC分类号： B23K31/00
摘要： PROBLEM TO BE SOLVED: To prevent stress corrosion cracking at a portion near weld zone of stainless steel piping by means of a compact device.
SOLUTION: Piping 1 is supplied with water and watertight plugs 3 and 3 are formed at two separate places in the piping. The water 2 inside the piping between the watertight plugs is cooled by supplying dry ice 8 into an outer container 4 and then an inner container 5. Since the piping is cooled, the water is solidified so that ice is formed. Attendant on the formation of the ice, the volume of the piping inside expands so that the piping is subjected to plastic deformation. This improves the residual stress of the piping.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过紧凑的装置防止不锈钢管道焊接区附近部分的应力腐蚀开裂。
解决方案：配管1供应水和水密塞3和3形成在管道中的两个不同的地方。通过将干冰8供给到外部容器4中，然后将内部容器5供给到水密封塞之间的管道内的水2来冷却。由于管道被冷却，水被固化，从而形成冰。在冰的形成上，管道内部的体积膨胀使得管道受到塑性变形。这改善了管道的残余应力。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2002224879A WELDING EQUIPMENT FOR REALIZING LOW RESIDUAL STRESS 失效
公开(公告)号：JP2002224879A
公开(公告)日：2002-08-13
申请号：JP2001029795
申请日：2001-02-06
申请人： HITACHI LTD
发明人： YANAGIDA NOBUYOSHI , ENOMOTO KUNIO , ANZAI HIDEYA , KOSHIISHI MASATO , SHIMIZU SADAHITO , TSUJIMURA HIROSHI
IPC分类号： B21D1/00 , B23K31/00 , B23K37/00
摘要： PROBLEM TO BE SOLVED: To provide a welding method and a welding equipment for realizing low residual stress in which the thermal efficiency and the mechanical efficiency necessary for converting the tensile residual stress in the surface of a weld part into the compressive stress, and the cost can be sufficiently reduced. SOLUTION: Transitional temperature difference between a surface layer of a base metal and a part immediately below the surface layer is generated in the surface area of a base metal 50 in the tensile stress state by spraying cooling liquid from a spray nozzle 11 and cooling the surface area heated by the heat input from the weld part when performing the welding by a welding rod 31. The tensile stress is generated in the surface layer to generate the tensile strain, and the surface layer is partially yielded. Next, by stopping the cooling, the thermal stress is eliminated. The deformation of the surface of the weld part is elastically returned from the partially yielded state, and the tensile stress is improved in a mitigated state or changed into the compressive residual stress.

3. 发明专利

JP2002066925A SHOT PEENING DEVICE AND NOZZLE HEAD 失效
公开(公告)号：JP2002066925A
公开(公告)日：2002-03-05
申请号：JP2000261555
申请日：2000-08-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NEFU AKIRA , ENOMOTO KUNIO , KAWAKAMI MITSUO , ISHIKAWA TETSUYA , SAITO MASAYUKI , HAYASHI EISAKU
IPC分类号： G21C19/02 , B05B3/02 , B05B3/18 , B24C1/10 , B24C5/02 , G21D1/00
摘要： PROBLEM TO BE SOLVED: To provide a shot peening device capable of automatically and efficiently carrying out a shot processing even at a narrow part and a complex surface shape part. SOLUTION: In the shot peening device, a pressurized air is injected from a nozzle head with a shot and the shot is collided onto a metal surface at thigh speed to carry out a peening processing. The device is provided with the nozzle head 1 in which a plurality of nozzle holes are opened on a side surface; a driving device 12 for axially moving the nozzle head 1; a driving device 13 for circumferentially turning the nozzle head; and support member 11 for supporting the nozzle head, the moving means and the rotating means. A side surface of the nozzle head 1 is opposed to a part to be processed in the state that the nozzle head 1 and the driving device 12 and 13 are supported by the support member 11 and the short peening processing is carried out by axially moving the nozzle head 1 while turning it.

4. 发明专利

JP2000146716A METHOD AND DEVICE FOR MEASURING RESIDUAL STRESS 失效
公开(公告)号：JP2000146716A
公开(公告)日：2000-05-26
申请号：JP31866498
申请日：1998-11-10
申请人： HITACHI LTD
发明人： YANAGIDA NOBUYOSHI , SUGANO SATOSHI , MIYAZAKI KATSUMASA , ENOMOTO KUNIO , ISHIWATARI MASAYUKI
IPC分类号： G01L1/00 , G01N3/40
摘要： PROBLEM TO BE SOLVED: To obtain the stress of the surface of a material from the indentation load-indentation depth response by a microhardness tester. SOLUTION: A push-in load is applied to the surface of a member for measuring residual stress by an indentation load mechanism 10 and an edge-shaped indenter 1, and the response of the indentation load-indentation depth at that time is measured. By comparing a measurement result with the response of the indentation load-indentation depth with known residual stress being stored in a database 35, the stress of the surface of the member is obtained. Also, by measuring the response of the indentation force-indentation depth of the surface of the member by changing the direction of the edge-shaped penetrator, the perpendicular stress component and the shear stress component for an arbitrary coordinate system being defined on the surface of the material can be obtained.

5. 发明专利

JP2000121786A METHOD FOR WATER JET PEENING OF INTERNAL STRUCTURAL MEMBER IN REACTOR PRESSURE VESSEL AND WATER JET PEENING DEVICE 失效
公开(公告)号：JP2000121786A
公开(公告)日：2000-04-28
申请号：JP22595399
申请日：1999-08-10
申请人： HITACHI LTD , HITACHI NUCLEAR ENG , HITACHI IBARAKI BUSINESS ENGIN
发明人： ENOMOTO KUNIO , HIRANO KATSUHIKO , HAYASHI EISAKU , MORINAKA TADASHI , SHIMIZU SADAHITO , SUGANO SATOSHI , TANAKA SHIGERU , ISHIKAWA TETSUYA
IPC分类号： B23K31/00 , B23K9/00 , C21D7/06 , G21C19/00 , G21D1/00
摘要： PROBLEM TO BE SOLVED: To prevent such damage as stress corrosion cracking by providing a structure where the jet containing cavitation bubbles from a nozzle is collided against a flat collision surface of a baffle body to change the direction of the jet and hit it with the surface of an internal structural member. SOLUTION: A nozzle 4 of an ascending and descending axis 6 is inserted parallel to an outer face of a shroud 23 by using an auxiliary hoist of a refueling machine. A jet 3 containing cavitation bubbles 2a from the nozzle 4 is injected downward and is collided against a flat surface of a baffle 5a near a vertical weld 17. The jet 3 collides with the vertical weld 17 as a collision jet 9a. On this occasion, it is preferable that the distance L between the tip of the nozzle 4 and the collision surface of the baffle 5a is 50 or less times as long as the injection aperture of the nozzle. Minute cavitation bubbles 2a that did not collapse when they collided with the baffle body 5a grow in a collision jet 9a and collapse by high pressure in the vertical weld 17, whereby tensile residual stress of the vertical weld 17 can be reduced effectively. It is preferable that the angle α between the central axis 3a of the injection aperture of the nozzle 4 and the collision surface 50 of the baffle body 5a is 60 deg. or more.

6. 发明专利

JPH1119608A WASHING DEVICE 失效
公开(公告)号：JPH1119608A
公开(公告)日：1999-01-26
申请号：JP17804697
申请日：1997-07-03
申请人： HITACHI LTD
发明人： HIRANO KATSUHIKO , ENOMOTO KUNIO
IPC分类号： G02F1/13 , B08B3/08 , B08B3/10 , H01L21/304
摘要： PROBLEM TO BE SOLVED: To efficiently remove the foreign matter sticking to member surfaces by injecting high-pressure water in water or water atmosphere to generate cavitation and casting the cavitation air bubbles diffused by a refraction and diffusion plate to wafer surfaces without directly bringing these bubbles colliding to the wafers etc. which are the objects to be washed. SOLUTION: The mechanically polished or chemically polished wafers 401 prior to washing are transferred by a manipulator from storage shelves to a washing tank and are chucked by a polyhedral chuck 402 previously installed in the washing tank. While a table 407 mounted at a chucking device is rotated, the high-pressure water is injected into the water tank from a nozzle 408 for a water jet and is directed toward the cavitation reflection and diffusion plate 403 on the table 407, by which the cavitation air bubbles are generated. The deposits are removed by the microjets or impact waves generated when the cavitation air bubbles diffused on the surfaces of the wafers 401 by the cavitation reflection and diffusion plate 403 collapse at their surfaces and near the surfaces.

7. 发明专利

JPH1010282A PREVENTIVE MAINTENANCE DEVICE IN REACTOR VESSEL 失效
公开(公告)号：JPH1010282A
公开(公告)日：1998-01-16
申请号：JP6415597
申请日：1997-03-18
申请人： HITACHI LTD , BABCOCK HITACHI KK , HITACHI NUCLEAR ENG , HITACHI KISOU KK
发明人： HAYASHI EISAKU , KUROSAWA KOICHI , YOSHIKUBO FUJIO , FURUKAWA HIDEYASU , MORINAKA TADASHI , ENOMOTO KUNIO , OTAKA MASAHIRO , CHIBA NOBORU , SATOU KAZUNORI
IPC分类号： G21C13/00 , G21C19/02 , G21D1/00
摘要： PROBLEM TO BE SOLVED: To suppress radioactive contamination from water surface caused by bubbles accompanying work under reactor water in a reactor pressure vessel. SOLUTION: A preventive maintenance device 1 having a drive mechanism for up and down, rotation and swing of a spray nozzle is put into reactor water in a reactor pressure vessel and set in the head of CRD(control rod drive mechanism) housing and a hole for fuel support metal of a core support plate 14. Water pressurized with a high pressure pump 19 is sprayed out of a spray nozzle so that cavitation bubbles generated by the spraying of water are supplied on the surface of core internal structure. Owing to the energy at the moment the bubbles are destructed, the residual stress on the surface is improved in the direction of resolution. Part of the bubbles including radioactive contamination in the reactor goes up to the water surface. The bubbles are trapped and collected with an air collection cover 39, purified with a filter and exhausted to a duct 42 for ventilation and air-conditioning of the reactor building.

8. 发明专利

JPH09281278A JOINT MADE OF SHAPE MEMORY ALLOY 失效
公开(公告)号：JPH09281278A
公开(公告)日：1997-10-31
申请号：JP9504996
申请日：1996-04-17
申请人： HITACHI LTD
发明人： AMANO KAZUO , FUJIMORI HARUO , ENOMOTO KUNIO , SHIGENAKA NAOTO , MOCHIZUKI MASATO , OTAKA MASAHIRO , HIRANO KATSUHIKO , MASUDA MINORU
IPC分类号： G21C19/20 , B21D39/04 , C22C19/03
摘要： PROBLEM TO BE SOLVED: To facilitate and rationalize piping replacement work by providing the outside surface of a cylindrical liner with grooves having parts penetrating this cylindrical liner and forming shape memory allay rings and the cylindrical liner to a fit structure. SOLUTION: The shape memory allay rings 1 are manufactured by using shape memory alloys. These allays are made to memorize a shape in such a manner that the diameter thereof is reduced by heating the allays to their austenitic transformation temp. or above. The cylindrical liner 2 to be inserted into the inner side of the shape memory allay rings 1 is provided with two rows of annular projecting parts 3a, 3b in its circumferential direction and the outside surface is provided with the grooves 5 having the parts penetrating the inside of the liner. When the shape memory alloy rings 1 restore the shape to the reduced diameter by inducing the austenitic transformation, the cylindrical liner 2 is deformed and the annular projecting parts 3a, 3b formed on its inside surface bite into a piping, thereby clamping the piping. In such a case, the rigidity of the cylindrical liner 2 is enhanced if the width of the grooves 5 on the outside surface of the cylindrical liner 2 is made small and the number of the grooves is reduced.

9. 发明专利

JPH09108596A FLUID JET NOZZLE AND STRESS IMPROVING METHOD USING THE SAME 失效
公开(公告)号：JPH09108596A
公开(公告)日：1997-04-28
申请号：JP27228595
申请日：1995-10-20
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： ENOMOTO KUNIO , HIRANO KATSUHIKO , OTAKA MASAHIRO , AMANO KAZUO , HAYASHI EISAKU , SHIMIZU SADAHITO , MORINAKA TADASHI , SATOU KAZUNORI
IPC分类号： B23K31/00 , B05B1/00 , E21B7/18
摘要： PROBLEM TO BE SOLVED: To provide a nozzle which is suitable to efficiently improve stress using jet water containing bubbles due to cavitation in an environment in liquid and a method for efficiently improve stress. SOLUTION: A cavitation bubble nucleus excitor, which generates, in large number, cavitation bubble nuclei or cavitation bubbles, is provided at a throat section 6 and/or between the throat section 6 and a diffusion chamber 8 so as to function as an increasing chamber 7, and a jet water including a large number of cavitation bubble nuclei and cavitation bubbles is ejected from a jet nozzle 1 against a metal material to effect peening on the surface of the metal material.

10. 发明专利

JPH08226992A METHOD AND DEVICE FOR IMPROVING RESIDUAL STRESS IN REACTOR STRUCTURE 失效
公开(公告)号：JPH08226992A
公开(公告)日：1996-09-03
申请号：JP33202995
申请日：1995-12-20
申请人： HITACHI LTD
发明人： ENOMOTO KUNIO , OTAKA MASAHIRO , KUROSAWA KOICHI , SAITO HIDEYO , TSUJIMURA HIROSHI , TAMAI YASUKATA , URASHIRO KEIICHI , MOCHIZUKI MASATO
IPC分类号： G21C19/02 , B24C1/10 , C21D7/04 , G21C13/036 , G21D1/00
摘要： PURPOSE: To suppress the radioactive contamination of a pump supplying nozzle with water. CONSTITUTION: A nozzle 3 is connected to a high pressure hose 15 connected with a high pressure pump 14. The nozzle 3 is inserted in reactor water in a pressure vessel 33 filled with reactor water. Pure water is pressurized with a high pressure pump 14 and supplied to the nozzle 3 from outside by way of the high pressure hose 15. The flow of pure water discharged from the nozzle 3 and accompanied by cavity is impinged to the surface of reactor structures contacting reactor water. As the pure water is led to the nozzle 3 after pressurized by the high pressure pump 14, radioactive contamination of the high pressure pump 14 is suppressed. Therefore, the maintenance and inspection of the high pressure pump 14 is easily conducted.

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