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91. 发明专利

JPH06114735A PEENING DEVICE 失效
公开(公告)号：JPH06114735A
公开(公告)日：1994-04-26
申请号：JP26119392
申请日：1992-09-30
申请人： HITACHI LTD , HITACHI NUCLEAR ENG , BABCOCK HITACHI KK
发明人： YOSHIKUBO FUJIO , KUROSAWA KOICHI , ENOMOTO KUNIO , HOSODA YUJI , SATOU KAZUNORI
IPC分类号： B24C1/10 , C21D7/06
摘要： PURPOSE:To perform a peening process while holding a distance between a processing objective connection part and a liquid injection nozzle to a fixed value. CONSTITUTION:In a connection part 3 formed by connecting a curved surface- shaped metal member 1 to a cylindrical metal member 14 at a fixed angle, high pressure liquid 13 is jetted from a nozzle 12 into liquid, to apply peening to a surface of the connection part 3 by generated cavitation bubbles. Here is adjusted the nozzle 12 for its position and attitude by a control unit 8 through nozzle driving gears 15, 16, 25, 26, 27, 28, 29, 30. In the control unit 8, based on a distance from the nozzle 12 to a surface of the metal member 1 measured by an axial directional distance sensor 20 and based on a distance from the nozzle 12 to a surface of the metal member 14 measured by an axial diametric directional distance sensor 19, a distance L reaching a surface of the connection part 3 from the nozzle 12 is obtained by calculation. The distance L is controlled so as to hold a fixed value, and an effective peening process is applied by holding a position of generating vortex filament cavitation of the highest water hammering pressure in the objective processing connection part 3.

92. 发明专利

JPH0618514A METHOD AND DEVICE FOR INSPECTING AND EVALUATING INDUSTRIAL PLANT 失效
公开(公告)号：JPH0618514A
公开(公告)日：1994-01-25
申请号：JP17662292
申请日：1992-07-03
申请人： HITACHI LTD
发明人： OTAKA MASAHIRO , ENOMOTO KUNIO , HIRANO AKIHIKO , KUROSAWA KOICHI , TAKAKU KAZUO , SAKATA SHINJI , HAYASHI MAKOTO , SUGANO SATOSHI
IPC分类号： G01N33/00 , G01N33/20
摘要： PURPOSE:To quantitatively evaluate an industrial plant in corresponding to the content and degree of damage and material deterioration of equipment and materials by automatically selecting an item to be inspected from a preset group of inspection processes based on a specific damaged point and primary evaluation on the degree of damage. CONSTITUTION:A largely damaged point is specified by means of a nondestructive inspecting device 1 selected in accordance with equipment to be inspected and the content of a damage to be inspected and primary evaluation 2 is performed on material deterioration so as to select the succeeding inspecting process by ranking the degree of damage. A small samples is collected 3 from the deteriorated point by a technigue which also tests various kinds of mechanical strengths and processed 5 to a test piece for observing metallic texture and a micro-test piece. An analyzing instrument 6 observes the texture of the test piece and analyzes the test piece for chemical composition and, at the same time, a micro-testing device 7 tests the mechanical characteristics, such as the impact strength, etc., of the micro-test piece. Then a secondary evaluating device 8 quantitatively discriminates the degree of material damage of the equipment and, at the same time, estimates the remaining life of the equipment. The device 8 also descriminates the need of repairing the equipment and modifying or exchanging the material.

93. 发明专利

JPH05177275A DEVICE FOR EXPANDING PIPE 失效
公开(公告)号：JPH05177275A
公开(公告)日：1993-07-20
申请号：JP34423091
申请日：1991-12-26
申请人： HITACHI LTD , HITACHI KYOWA KOGYO KK , HITACHI ENG SERVICE
发明人： KUROSAWA KOICHI , SAITO HIDEYO , HAYASHI EISAKU , ENOMOTO KUNIO , NUMATA TAKAYUKI , TSUMORI MASAYUKI
IPC分类号： B21D26/033 , B21D26/045 , B21D39/04 , B21D39/08
摘要： PURPOSE:To uniformly expand a diameter in a pipe stock over the whole length by forming a cap type sealing having a collar fitted to a step part and assembling the sealing to a spigot joint type at both end parts of a pipe expanding medium. CONSTITUTION:At both end parts of the elastic body-made pipe expanding medium 4, tapered parts 5 and small diameter step parts 6 near the inside of axial direction of the pipe expanding medium 4 from the tapered parts are formed and on the other hand, the collers 9 fitted to the step parts 6 in the sealings 7 are arranged to form the sealing 7 as the cap type. Then, at both end parts of the pipe expanding medium 4, the sealings 7 are assembled to the spigot joint type. Therefore, at the time of expanding the pipe expanding medium 4, the tapered parts 8 of the pipe expanding medium 4 are backed up by the collar 9 in the sealing 7. Thus, trouble, for which the tapered part 8 of the pipe expanding medium 4 is protruded from the tip part of the sealing 7, is eliminated. By this method, the uniform pipe expanding force is applied over the whole length of the pipe stock through the pipe expanding medium 4.

94. 发明专利

JPH0584452A WATER-JET PEENING NOZZLE FOR IMPROVING RESIDUAL STRESS 失效
公开(公告)号：JPH0584452A
公开(公告)日：1993-04-06
申请号：JP24964891
申请日：1991-09-27
申请人： HITACHI LTD , SUGINO MACH , BABCOCK HITACHI KK
发明人： KUROSAWA KOICHI , ENOMOTO KUNIO , SATOU KAZUNORI , TAMAI YASUKATA , SAITO HIDEYO , ICHIE KOZO , SAKAI HIDEAKI
IPC分类号： B05B1/02 , B05B1/14 , B24C1/10 , B24C5/04 , C21D7/04 , C21D7/06
摘要： PURPOSE:To shorten the interval between a nozzle and the surface of metal and to improve residual stress while securing the ratio of the distance between the nozzle and the surface of metal and the hole diameter of the orifice of the nozzle by tilting both the center axis of a conduit part for supplying high- pressure liquid in the upstream side of the nozzle and the center axis of the spouting hole of liquid. CONSTITUTION:A water-jet peening nozzle 1 is provided with the spouting hole of liquid which consists of an orifice part 3 for increasing the flow velocity of liquid and the following horn part 4 for a conduit part 2 for supplying high- pressure liquid on the upstream side. The horn part 4 sectorially tapers while keeping the center axis 6 of this orifice 3 as a center axis on the downstream side of the orifice 3. Moreover both the center axis 5 of the conduit part 2 and the center axis 6 of the spouting hole have the specified oblique angle theta. Therefore, the distance between the nozzle and the surface of metal is made small in the spouting direction even in a narrow part and residual stress is improved.

95. 发明专利

JPH0580187A INTRA-REACTOR STRUCTURE MAINTAINING METHOD 失效
公开(公告)号：JPH0580187A
公开(公告)日：1993-04-02
申请号：JP24168891
申请日：1991-09-20
申请人： HITACHI LTD
发明人： KUROSAWA KOICHI , ENOMOTO KUNIO , URASHIRO KEIICHI , AOTA KINYA , YAMAMOTO MICHIYOSHI , TAMAI YASUKATA , NEMEZAWA ISAO , NOMURA KEIICHI
IPC分类号： G21C13/00 , G21C19/02 , G21D1/00
摘要： PURPOSE:To secure the soundness of an intra-reactor structure comparatively easily by employing the replacement, partical repair, and preventive maintenance mothods in proper combination according to the degree of difficulty of the dismantling and remounting works from/to the intra-reactor structure. CONSTITUTION:The intra-reactor structure of a nuclear reactor is installed in a pressure vessel 3 and is composed of such apparatus as a shroud 1, shroud supporting cylinder 2, upper grating plate 5, core supporting plate 6, jet pump diffuser 8a, jet pump riser 8b, jet pump mixer 8c, shroud support leg 9, shroud support plate 12, fuel supporting metal piece 21, vapor dryer 22, air/water separator and shroud head 23, control rod 24, control rod guide pipe 25, core spray sparger/piping 26, low pressure water injection piping 27, differential pressure sensing/boric acid water infection piling 28, etc.

96. 发明专利

JPH04362124A RESIDUAL STRESS IMPROVEMENT BY WATER JET PEENING 失效
公开(公告)号：JPH04362124A
公开(公告)日：1992-12-15
申请号：JP13778091
申请日：1991-06-10
申请人： HITACHI LTD , HITACHI KYOWA KOGYO KK , BABCOCK HITACHI KK , SUGINO MACH
发明人： KUROSAWA KOICHI , SAITO HIDEYO , TSUJIMURA HIROSHI , ENOMOTO KUNIO , NUMATA TAKAYUKI , SHINDOU TAKENORI , ICHIE KOZO , SAKAI HIDEAKI
IPC分类号： B24C1/10 , C21D7/06
摘要： PURPOSE:To execute a residual stress improvement by striking the surface of a metallic material by the impact of the cavitation generated by a water jet under water or the underwater environment created in the atm. air, thereby imparting the residual stresses of surface compression to this metallic material. CONSTITUTION:The high-pressure water fed via a hose 2 and a conduit 15 from a high-pressure pump 1 is ejected into the water from a horn type nozzle 3 toward the metallic material 4 placed in the water in a tank 16 to positively generate the cavitation. The metallic material 4 is striken by the impact force generated by the collapse of the air bubbles to locally generate the strain above the yield point, by which the residual stresses of the surface compression are imparted to the metallic material. The nozzle 3 is moved along the material 4 by a moving mechanism 44. In another embodiment, the metallic material is placed in the atm. air and high-pressure water flow is ejected from the central ejection port of the nozzle into the local underwater environment formed by the water flow ejected from the ejection port in the outer peripheral part of the nozzle to generate the cavitation in same way, by which the residual stress improvement is similarly executed.

97. 发明专利

JPH03123859A METHOD AND DEVICE FOR EASY DETERIORATION DECISION MAKING 失效
公开(公告)号：JPH03123859A
公开(公告)日：1991-05-27
申请号：JP26163289
申请日：1989-10-06
申请人： HITACHI LTD
发明人： YOSHIMURA TOSHIHIKO , ISHIKAWA YUICHI , SHIMIZU TASUKU , ENOMOTO KUNIO
IPC分类号： G01N33/20
摘要： PURPOSE:To easily and accurately diagnose the extent of the deterioration of a metallic material by etching the surface of the metallic material chemically or electrochemically and estimating the strength characteristics of the metallic material from a surface state obtained by the etching. CONSTITUTION:The surface of the metallic material is etched chemically or electrochemically and a replica sampling means 7 suspended by a crane 8 is moved to a position to be inspected to sample a replica of the etched surface. Therefore, an actual machine member is not taken out and a surface state wherein corrosion characteristics by the chemical or electrochemical etching is reflected can be taken out without destruction. The chemical or electrochemical etching is not affected by an external field magnetic field, residual stress, etc., in the environment wherein the member to be etched is placed, so variation in surface mode at the time of the replica sampling is small and the accuracy of deterioration detection is improved. Further, the metallic material can be evaluated by the easy electrochemical etching, so a large-scale device is not necessary.

98. 发明专利

JPH02126102A DETECTION OF THINNING OF PIPE 失效
公开(公告)号：JPH02126102A
公开(公告)日：1990-05-15
申请号：JP27926088
申请日：1988-11-07
申请人： HITACHI LTD
发明人： HASEGAWA KUNIO , OTAKA MASAHIRO , ENOMOTO KUNIO
IPC分类号： G01B7/06 , G01B7/00 , G01N27/83
摘要： PURPOSE:To easily detect thinning of a pipe without omission by providing plural conductive columns on the outside of the pipe on a circle and using them as terminals to flow a current in the peripheral direction and measuring the magnetic flux distribution. CONSTITUTION:A metallic pipe 1 covered with a heat insulator 2 is provided with two or more conductive columns, through which the current flows to the pipe, on the same circle. When the current flow to conductive columns 3 from a constant current device 5, the current is divided into two and flows from conductive columns 3 in pipe peripheral directions; and the current flows equally right and left when the thickness of the pipe is uniform, but the quantity of the current flowing to a thinner side is smaller and that to the other part is larger when the pipe has a thinner part. The magnetic flux distribution in the peripheral direction which is formed by the current is measured from the outside of the heat insulator 2 by a magnetic sensor 4 to detect thinning of the pipe 1. A superconductive quantum interference element of extra-high sensitivity is used as the magnetic sensor to obtain the magnetic flux density with a high precision, and slight thinning is detected.

99. 发明专利

JPH0122917B2 失效
公开(公告)号：JPH0122917B2
公开(公告)日：1989-04-28
申请号：JP10116580
申请日：1980-07-25
申请人： HITACHI LTD
发明人： SAGAWA WATARU , KAWASHIMA HIROAKI , SHIMIZU TASUKU , ENOMOTO KUNIO
IPC分类号： G21C15/24 , G21C15/25

100. 发明专利

JPS63259447A INSPECTION DEVICE FOR PIPING AND CASING 失效
公开(公告)号：JPS63259447A
公开(公告)日：1988-10-26
申请号：JP9306187
申请日：1987-04-17
申请人： HITACHI LTD
发明人： SUGANO SATOSHI , HASEGAWA KUNIO , ENOMOTO KUNIO , HAYASHI MAKOTO , OTAKA MASAHIRO , SHIMIZU TASUKU , YAMAMOTO MICHIYOSHI
IPC分类号： G01B15/02 , G01N23/18
摘要： PURPOSE:To enable the specifying of a position and a range of generated reduction in thickness, by measuring intensity of radiation along the outer surface of a piping or the like with a radiation sensor. CONSTITUTION:In a piping or the like made of a material which is liable to form a radioactive clad having a radioactive substance contained in a fluid adhering to the inner wall of a member, the radioactive clad is peeled off at a position where reduction in thickness occurs in the inner wall so that intensity of radiation as measured from the outer surface of the piping becomes less than that of the position where no such a reduction occurs. On the other hand, in a piping made of a material that could make a radioactive substance contained in the fluid hard to adhere to the inner wall of the member and prevent the formation of a radioactive clad, a piping through which the fluid containing radioactive substance passes or the like temporarily, intensity of radiation enhanced at the position with a reduced thickness as compared to the position without such a reduced thickness. Thus, a sensor for detecting radiation is used to measure a distribution of intensity of radiation along the outer surface of the piping or the like, thereby simplifying detection on where a reduction in thickness occurs.

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