专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JP2000193200A METHOD OF PREVENTING THERMAL FATIGUE OF NOZZLE 失效
公开(公告)号：JP2000193200A
公开(公告)日：2000-07-14
申请号：JP36894698
申请日：1998-12-25
申请人： HITACHI LTD , HITACHI ENGINEERING CONSULTING
发明人： HIRANO AKIHIKO , KOJIMA NAOKI , ENOMOTO KUNIO
IPC分类号： G21C15/02 , F17D3/12 , G21C17/003
摘要： PROBLEM TO BE SOLVED: To prevent the generation of thermal fatigue by detecting the high temperature fluid pool on a slightly upstream part of a low temperature fluid side of a mixing point of low temperature fluid and high temperature fluid, and discharging the high temperature fluid pool. SOLUTION: A low temperature fluid circulation piping 2 is connected to a high temperature fluid container 1 through a fluid supply nozzle 3 and a fluid discharge nozzle 4, and a temperature sensor 5 is connected to the inside contacted with an outer periphery, of an upper part of the fluid supply nozzle 3. On this occasion, a high temperature fluid pool is gradually formed on an upper part of the inside of the fluid supply nozzle 3 by the convection current, heat conduction and heat transfer with the lapse of time in a state that an inside of the fluid supply nozzle 3 is filled with the low temperature fluid, and a temperature of this high temperature fluid pool is detected by the temperature sensor 5. A pump rotation controller 7 is automatically operated on the basis of this detection, and a speed of rotation of a circulatin pump 6 is increased at a rise of speed of rotation of pump starting time 11, for discharging the high temperature fluid pool.

42. 发明专利

JP2000058495A SUBSTRATE CLEANING EQUIPMENT 失效
公开(公告)号：JP2000058495A
公开(公告)日：2000-02-25
申请号：JP22407898
申请日：1998-08-07
申请人： HITACHI LTD
发明人： HIRANO KATSUHIKO , ENOMOTO KUNIO , AMANO KAZUO
IPC分类号： B08B11/04 , B08B3/10 , H01L21/304
摘要： PROBLEM TO BE SOLVED: To enable a substrate to be kept high in cleanness without causing damage to it by a method wherein a cavitation air bubble holding means that holds cavitation air bubbles near the surface of the substrate until they burst is provided. SOLUTION: When water of high pressure is spouted out from a nozzle 12 against a transfer carrier 2 in a cleaning tank, cavitation air bubbles are generated owing to a pressure difference between surrounding water and spouting water and a shearing action. When a jet of water 21 accompanied by active cavitation flows between substrate 1, it collides against projections 22 provided inside a transfer carrier 2 as cavitation air bubbles. As a result, cavitation air bubbles staying in a jet of water 21 are made to stay around the projections 22 without passing along the surface of the substrate 1. The cavitation air bubbles staying around the projections 22 grow gradually bigger and burst, and foreign objects attached to the surface of the substrate 1 are removed by a burst pressure induced by bursts of cavitation air bubbles. As mentioned above, a cleaning effects is produced.

43. 发明专利

JPH1113951A SHAPE MEMORY ALLOY JOINING METHOD 失效
公开(公告)号：JPH1113951A
公开(公告)日：1999-01-22
申请号：JP16560497
申请日：1997-06-23
申请人： HITACHI LTD
发明人： ENOMOTO KUNIO , AMANO KAZUO , FUJIMORI HARUO , MASUDA MINORU , FURUKAWA HIDEYASU
IPC分类号： G21C19/20 , F16L13/14 , G21D1/00
摘要： PROBLEM TO BE SOLVED: To facilitate pipe connection even in liquid by contracting a coupler by a force produced when a shape memory alloy driver is contracted by heat to recover an original shape, and connecting together a pair of pipe end parts inserted into the coupler. SOLUTION: An SMA joint 9 is constructed by providing an annular SMA contracted pipe driver 8 (8-1, and 8-2) fitted with a coupler 7 in both end outer sides of the coupler 7 made of a cylindrical metal. The contracted pipe driver 8 manufactured by setting its inner diameter smaller than the outer diameter of the coupler 7 is subjected to expansion, then the temperature of the contracted pipe driver 8 is increased to a deformation end temperature or higher, and the coupler 7 is contracted by the contracting deformation of the contracted pipe driver 8 to recover its shape before the expansion at the time of heating. By the contraction of the coupler 7, a pair of pipes 10-1 and 10-2 inserted beforehand into the coupler 7 are connected to be integral. Then, the contracted pipe driver 8 is removed and reused.

44. 发明专利

JPH10293191A PREVENTIVE MAINTENANCE DEVICE FOR STRUCTURAL MEMBER IN REACTOR PRESSURE VESSEL 失效
公开(公告)号：JPH10293191A
公开(公告)日：1998-11-04
申请号：JP4188498
申请日：1998-02-24
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KUROSAWA KOICHI , HAYASHI EISAKU , SHIMIZU SADAHITO , OTAKA MINORU , YOSHIKUBO FUJIO , MORINAKA TADASHI , NISHINO MASAYUKI , CHIBA NOBORU , ENOMOTO KUNIO , SATOU KAZUNORI
IPC分类号： G21C19/02 , G21D1/00
摘要： PROBLEM TO BE SOLVED: To make it possible for a spray nozzle to move to a part subject to preventive maintenance by providing an annular guide rail and a turntable turning on the guide rail to allow a spray nozzle moving device to move the spray nozzle in the radial and axial directions of a core shroud. SOLUTION: This device is equipped with a guide rail, a turn table, a control panel 18, a clad recovery device 41, spray nozzle moving devices 124 and 124c and a spray water supply device 125. The guide rail, the turn table and time spray nozzle movers 124 and 124c are integrated on the turntable and are lowered to an upper flange. The spray nozzle is continuously moved around a corer shroud by the turning of the turntable to shorten the time required for preventive maintenance. The vertical movement of an elevator driven by a motor and the turning of the turn table allows time spray nozzle to sprays a jet of a water flow, moving in a zigzag near a weld over the full perimeter of it in the circumferential direction.

45. 发明专利

JPH10245625A METHOD FOR IMPROVING RESIDUAL STRESS IN METALLIC MATERIAL AND DEVICE THEREFOR 失效
公开(公告)号：JPH10245625A
公开(公告)日：1998-09-14
申请号：JP5190797
申请日：1997-03-06
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KUROSAWA KOICHI , FURUKAWA HIDEYASU , TAKADA HIROSHI , OTAKA MINORU , NISHINO MASAYUKI , ENOMOTO KUNIO , SATOU KAZUNORI
IPC分类号： G21D1/00 , C21D7/04
摘要： PROBLEM TO BE SOLVED: To provide a method for improving the residual stress in a metallic material effectively applying compressive residual stress without consuming a large quantity of water and to provide a device therefor. SOLUTION: A residual stress improving device for a metallic material is composed of a liq. tank 7, a shock wave generating electrode 6 arranged in the liq. tank 7, a metallic material 12 to be improved in residual stress immersed in the liq. tank 7, a power source device 1 feeding d.c. high voltage to the shock wave generating electrode 6 generating shock waves and electrode moving means 2 and 5 moving the electrode position in the shock wave generating device.

46. 发明专利

JPH10113871A METHOD AND NOZZLE FOR IMPROVING RESIDUAL STRESS OF METALLIC MATERIAL 失效
公开(公告)号：JPH10113871A
公开(公告)日：1998-05-06
申请号：JP24413097
申请日：1997-09-09
申请人： HITACHI LTD , HITACHI KYOWA ENG KK , BABCOCK HITACHI KK , SUGINO MACH
发明人： KUROSAWA KOICHI , SAITO HIDEYO , NUMATA TAKAYUKI , TSUJIMURA HIROSHI , ENOMOTO KUNIO , SHINDOU TAKENORI , ICHIE KOZO , SAKAI HIDEAKI
IPC分类号： B24C1/10 , B24C5/04 , C21D7/06
摘要： PROBLEM TO BE SOLVED: To effectively impart a compressive residual stress to the surface of a metallic material which is in air in an atmospher equivalent to that in water. SOLUTION: A nozzle 8 has a water flow jet port 9 which is at the central part and a water flow jet port 10 which surrounds the water flow jet port 9. A water flow jets from the water flow jet port 9 and 10 of the nozzle 8 which is in air to a metallic material in air. A water flow 11 which jets from the respective water flow jet ports 10 forms a water region partially in air as if water existed in a virtual water tank about the water flow jet port 9. A water jet 12 for high pressure peening jets from the water flow jet port 9 at a speed higher than a water flow 11 into that water region. The water jet 12 contains cavitation air bubbles and collides against the surface of the metallic material. An impact force produced due to collapsing of the cavitation air bubbles generates a compressive residual stress in the metallic material.

47. 发明专利

JPH09242945A JOINT MADE OF SHAPE MEMORY ALLOY AND CONNECTION METHOD OF PIPES IN FURNACE 失效
公开(公告)号：JPH09242945A
公开(公告)日：1997-09-16
申请号：JP4590996
申请日：1996-03-04
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： AMANO KAZUO , IZUMIYAMA AKIMASA , ENOMOTO KUNIO , HATTORI SHIGEO , SHIGENAKA NAOTO , OTAKA MINORU , OTAKA MASAHIRO , HIRANO KATSUHIKO
IPC分类号： G21C15/22 , F16L13/14
摘要： PROBLEM TO BE SOLVED: To provide a joint made of a shape memory alloy which is used in the connection of pipes in a furnace and maintains the connection of pipes stably at all times without being affected by heat cycle in the furnace and a connection method of the pipes in the furnace. SOLUTION: An annular recessed part 5 is provided on an outer surface of a cylindrical liner 2 and on an outer surface of the cylindrical liner 2 in a part in which each shape memory alloy ring 1 is fitted in a joint 65a which is made of a shape memory alloy and is constituted by two shape memory alloy rings 1 and one cylindrical liner 2 to provide a clearance between an inner face of each shape memory alloy ring 1 and the outer surface of the cylindrical liner 2 in order to realize fitting configuration. Consequently, it is possible to maintain the connection of pipes stably at all times.

48. 发明专利

JPH0949897A METHOD AND DEVICE FOR DETECTING AND REPAIRING DAMAGE TO IN CORE EQUIPMENT CAUSED BY IRRADIATION 失效
公开(公告)号：JPH0949897A
公开(公告)日：1997-02-18
申请号：JP20072595
申请日：1995-08-07
申请人： HITACHI LTD
发明人： OTAKA MASAHIRO , MORINAKA TADASHI , KATO TAKAHIKO , ENOMOTO KUNIO , HAYASHI MAKOTO
IPC分类号： G01N27/82 , G21C17/003 , G21C19/02
摘要： PROBLEM TO BE SOLVED: To directly grasp how an equipment material is damaged by calculating the material strength data of the specimen from a prepared database to show the correlation between the damage to stainless steel 1 and the magnetic properties of it and from those of the measured specimen. SOLUTION: A robot controller 18 drives a drive robot 11 to make a damage measurement head 27 face a designated inspection area and scan it one after another. The magnetic properties showing how a material of in core equipment 1 is damaged is measured by the damage measurement head 27, and the degree of damage is evaluated by comparing measurement result with the strength and solid-state properties database of the damaged material contained in a damaged evaluation device 28. Subsequently, it is judged whether the implementation of recovering treatment is necessary or not by comparing the degree of damage with a standard value, and the result of the judgment is outputted to an integrated control panel 19. If the implementation of recovering treatment is judged to be necessary, the integrated control panel 19 positions an induction heating head 15 so as to face the damaged part through the drive robot 11 and quickly heat the damaged part locally to the damage-remedying temperature through an induction heater 16.

49. 发明专利

JPH08336755A WATER JET PEENING TREATMENT DEVICE AND TREATMENT METHOD 失效
公开(公告)号：JPH08336755A
公开(公告)日：1996-12-24
申请号：JP14771795
申请日：1995-06-14
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： ENOMOTO KUNIO , KUROSAWA KOICHI , HAYASHI EISAKU , HIRANO KATSUHIKO , OTAKA MASAHIRO , AMANO KAZUO , SATOU KAZUNORI , MORINAKA TADASHI
IPC分类号： B24C1/10 , C21D7/06
摘要： PURPOSE: To generate a compression residual stress and improve the residual stress present in advance by striking a metal material surface by use of a water jet in underwater environment to plastically deform it. CONSTITUTION: A nozzle 10 having a circular staircase, a reverse injection hole, an annular orifice, and a sub-injection hole is used for numerously generating active cavitation bubbles, a straightening vane and an expanding and contracting mechanism are also provided, and a sealed outer cylinder 17 is provided so that the same environment as in water can be provided even in the atmosphere, and a jet is never scattered. The nozzle 10 is mounted on an X-Y-Z driving device 26 through a holder 25, high pressure water 2 in which the water of a regulating water tank 34 is pressurized by a high pressure pump 27 is sent to the nozzle 10, low pressure water 14 from a pump 29 and nitrogen gas 31 from a bomb 30 to a first sub-injection hole, and low pressure water 14 from a low pressure pump 27 to a second sub-injection hole 9. Jet fluid from the nozzle 10 is discharged by a drain-pump 32, and treated by a waste water treatment device 33.

50. 发明专利

JPH07270590A METHOD AND APPARATUS FOR PREVENTIVE MAINTENANCE OF BOTTOM PART OF REACTOR PRESSURE VESSEL 失效
公开(公告)号：JPH07270590A
公开(公告)日：1995-10-20
申请号：JP6240894
申请日：1994-03-31
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： G21D1/00 , B08B9/02 , B08B9/093 , C21D7/06 , G21C13/00 , G21C13/036 , G21C19/02
摘要： PURPOSE:To provide preventive maintenance method and apparatus for suppressing stress corrosion cracking of housing, and the like, at the bottom of a reactor pressure vessel. CONSTITUTION:The preventive maintenance apparatus 1 equipped with a drive mechanism capable of freely moving up and down, turning, and swinging an ejection nozzle 24 is set at the head part of CRD housing 45 and in the hole 15 of a core supporting plate 14 for fuel supporting metal. Water pressurized by a high pressure pump is ejected through an ejection nozzle 24 to produce cavitation bubbles. The bubbles are fed to all parts to be protected where the bubbles are collapsed to generate energy for offsetting the residual tensile stress.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式