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公开(公告)号：US20210031264A1
公开(公告)日：2021-02-04
申请号：US16930416
申请日：2020-07-16
Applicant: Hitachi-GE Nuclear Energy, Ltd.
Inventor： Yukari NAKAYAMA , Sei HIRANO , Yoshihisa KIYOTOKI
Abstract: The invention provides a method of manufacturing a transition piece that has a high degree of freedom in adjustment of a length, a shape, or the like, can carry out a dissimilar metal welding easily, and is easy to perform, and a transition piece. The transition piece includes one end having the same composition as one material to be welded, another end having the same composition as another material to be welded, and an intermediate layer formed between the one end and the other end. The composition of the one end and the composition of the other end become the same as approaching a center. In the method of manufacturing the transition piece according to the invention, at least the intermediate layer among the one end, the other end, and the intermediate layer is formed by a additive manufacturing method.
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公开(公告)号：US20190193195A1
公开(公告)日：2019-06-27
申请号：US16228923
申请日：2018-12-21
Applicant: Hitachi-GE Nuclear Energy, Ltd.
Inventor： Sei HIRANO , Yoshihisa KIYOTOKI , Hajime MIYATA , Hirotsugu KAWANAKA , Shinji MATSUSHITA , Hiroshi SHIRATORI
CPC classification number: B23K20/1275 , B22F3/115 , B22F2007/042 , B22F2999/00 , B23K26/342 , B23K2101/34 , B23K2103/05 , B23K2103/26 , B23P15/001 , C21D2251/04 , C21D2261/00 , C22C1/0425 , C22C19/07 , C22F1/10 , C23C24/10 , C23C24/106 , C23C28/021 , F01L3/02 , F01L3/08 , F01L2101/00 , F16K3/0263 , F16K3/12 , F16K15/021 , F16K25/00 , F16K25/005 , G21C17/0225 , G21D1/02 , B22F2207/13
Abstract: The present invention is intended is to improve the corrosion resistance of an overlay used in a nuclear power plant, and to reduce dissolution of cobalt from an overlay. The corrosion and wear resistant overlay is formed along a surface of a base by laser lamination modeling, and is configured from a plurality of metal layers of a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers is the largest in the metal layer closest to the base, and is gradually smaller in the metal layers farther away from the base. The intensity of the laser beam applied to form layers by laser lamination modeling is adjusted so that the carbide eutectics that precipitate in at least the outermost metal layer have a controlled size of 10 μm or less.
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3.发明申请公开(公告)号：US20150117585A1
公开(公告)日：2015-04-30
申请号：US14528522
申请日：2014-10-30
Applicant: Hitachi-GE Nuclear Energy, Ltd.
Inventor： Ryo KUBOTA , Kenji ONODERA , Yoshihisa KIYOTOKI
IPC: G21C9/00 , F15B13/043
CPC classification number: G21C9/00 , F15B13/043 , F16K31/02 , G21C9/004 , G21D1/02 , G21D3/06 , Y02E30/40 , Y10T137/87209
Abstract: A gas supply apparatus of the present invention includes: an operating valve that is placed in the middle of a piping for letting at least gas in a plant flow and that operates a valve main body by the gas flowing in the piping; a first electromagnetic valve that is placed in the middle of the piping and that opens or closes a flow of the gas to the operating valve; and a gas supply source that supplies the first electromagnetic valve with the gas. A gas discharge line of the first electromagnetic valve has a switching valve placed therein and has a second electromagnetic valve placed between the switching valve and the gas supply source. The switching valve switches between a gas discharge from the first electromagnetic valve and a gas supply to the first electromagnetic valve. When a power source is lost, the switching valve is switched to connection to the gas supply source so as to supply the first electromagnetic valve with the gas. At the time of a normal operation, the second electromagnetic valve opens a gas discharge line side and closes a switching valve side, and when the power source is lost, the second electromagnetic valve opens the switching valve side and closes the gas discharge line side. In this way, even when the power source is lost, an operating valve such as an air-operated valve can not only be operated remotely but also be operated safely by a remote operator.
Abstract translation: 本发明的气体供给装置包括：操作阀，其放置在用于使至少气体流入工厂流动的管道的中间，并且通过在管道中流动的气体来操作阀主体; 第一电磁阀，其放置在所述管道的中间并且打开或关闭所述气体到所述操作阀的流动; 以及向第一电磁阀供给气体的气体供给源。 第一电磁阀的排气管线具有置于其中的切换阀，并且具有置于切换阀和气体供给源之间的第二电磁阀。 切换阀在从第一电磁阀排出的气体与第一电磁阀的气体供给之间切换。 当电源丢失时，切换阀切换到与气体供给源的连接，以向第一电磁阀供应气体。 在正常运行时，第二电磁阀打开气体排出管路侧并关闭切换阀侧，当电源丢失时，第二电磁阀打开切换阀侧并关闭气体排出管路侧。 以这种方式，即使电源丢失，诸如气动阀的操作阀不仅可以远程操作，还可以由远程操作者安全地操作。
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公开(公告)号：US20180182500A1
公开(公告)日：2018-06-28
申请号：US15852817
申请日：2017-12-22
Applicant: Hitachi-GE Nuclear Energy, Ltd. , Okano Valve Mfg. Co. Ltd.
Inventor： Daisuke HIRASAWA , Yoshihisa KIYOTOKI , Hisashi SATOU , Keisuke SAKEMURA , Keiji SASAKI , Yuta FUKUDA
IPC: G21C15/18 , G21C15/243
CPC classification number: G21C15/18 , G21C9/016 , G21C15/185 , G21C15/243 , Y02E30/40
Abstract: A high reliable water injection device is provided that injects water into a reactor containment vessel and can reliably shut off cooling water at normal times and quickly and reliably inject water into the reactor containment vessel without the need for external power, in a case of emergency. The water injection device injects water into a reactor containment vessel includes a flow path through which cooling water is supplied; a disk that closes the flow path; a swing arm that is connected to the disk and performs closing and opening of the flow path by the disk; and a weight that is connected to the swing arm via a swing lever, in which the weight is supported by a support member made of a low melting point alloy.
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Patent Agency Ranking
公开(公告)号：US20140254738A1
公开(公告)日：2014-09-11
申请号：US14183995
申请日：2014-02-19
Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.
Inventor： Ryo KUBOTA , Kenji ONODERA , Yoshihisa KIYOTOKI
IPC: G21C9/004
CPC classification number: G21C9/004 , F16K17/00 , F16K51/00 , G21D1/02 , G21D3/06 , Y02E30/40 , Y10T137/87917
Abstract: The present invention is directed to remote operation of an operation valve such as an air operated valve even at the time of power loss. A gas supply apparatus of the present invention includes: an operation valve mounted in some midpoint of a piping for passing at least gas in a plant and operating a valve body by the gas flowing in the piping; an solenoid valve mounted in some midpoint of the piping and allowing/stopping flow of the gas to the operation valve; and a gas supply source for supplying gas to the solenoid valve. A switching valve for switching between exhaust from the solenoid valve and gas supply to the solenoid valve is mounted in an exhaust line of the solenoid valve and, at the time of power loss, the switching valve is switched to connection to the gas supply source for supplying gas to the solenoid valve.
Abstract translation: 本发明涉及即使在电力损失时诸如气动阀的操作阀的远程操作。 本发明的气体供给装置包括：安装在管道的一些中点的操作阀，用于使至少气体通入工厂并通过在管道中流动的气体操作阀体; 安装在管道的一些中点的电磁阀，允许/停止气体流向操作阀; 以及用于向电磁阀供给气体的气体供给源。 用于在电磁阀的排气与电磁阀的供气之间进行切换的切换阀安装在电磁阀的排气管中，在断电时切换阀连接到气体供给源 向电磁阀供气。
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公开(公告)号：US20240200679A1
公开(公告)日：2024-06-20
申请号：US18588722
申请日：2024-02-27
Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.
Inventor： Hirotsugu KAWANAKA , Yoshihisa KIYOTOKI , Sei HIRANO , Daisuke HIRASAWA , Junya KANEDA
IPC: F16K25/04 , B22F10/28 , B22F10/64 , B33Y10/00 , B33Y40/20 , B33Y80/00 , C22C19/07 , C22F1/10 , F16K3/30
CPC classification number: F16K25/04 , B22F10/64 , B33Y40/20 , B33Y80/00 , C22C19/07 , C22F1/10 , B22F10/28 , B22F2301/15 , B33Y10/00 , F16K3/30
Abstract: To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.
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公开(公告)号：US20220025984A1
公开(公告)日：2022-01-27
申请号：US17311726
申请日：2019-11-06
Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.
Inventor： Hirotsugu KAWANAKA , Yoshihisa KIYOTOKI , Sei HIRANO , Daisuke HIRASAWA , Junya KANEDA
Abstract: To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.
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公开(公告)号：US20210323085A1
公开(公告)日：2021-10-21
申请号：US17363826
申请日：2021-06-30
Applicant: Hitachi-GE Nuclear Energy, Ltd.
Inventor： Sei HIRANO , Yoshihisa KIYOTOKI , Hajime MIYATA , Hirotsugu KAWANAKA , Shinji MATSUSHITA , Hiroshi SHIRATORI
IPC: B23K20/12 , C22F1/10 , F16K15/02 , F16K25/00 , F16K3/12 , G21D1/02 , F16K3/02 , C22C1/04 , C23C24/10 , B22F3/115 , C22C19/07 , F01L3/02 , G21C17/022 , C23C28/02 , F01L3/08 , B23K26/342
Abstract: Intended is to improve the corrosion resistance of an overlay used in a nuclear power plant, and to reduce dissolution of cobalt from an overlay. The corrosion and wear resistant overlay 7 is formed along a surface of a base 2 by laser lamination modeling, and is configured from a plurality of metal layers 1a, 1b, 1c, and 1d of a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers 1a, 1b, 1c, and 1d is the largest in the metal layer 1a closest to the base 2, and is gradually smaller in the metal layers 1b, 1c, and 1d farther away from the base 2. The intensity of the laser beam applied to form layers by laser lamination modeling is adjusted so that the carbide eutectics that precipitate in at least the outermost metal layer 1d have a controlled size of 10 μm or less.
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公开(公告)号：US20170370491A1
公开(公告)日：2017-12-28
申请号：US15539449
申请日：2015-12-14
Applicant: Hitachi-GE Nuclear Energy, Ltd. , Okano Valve Mfg. Co. Ltd.
Inventor： Yoshiharu KAWAHARA , Yoshihisa KIYOTOKI , Takayoshi NAKASHIMA , Keisuke SAKEMURA , Yoshitomo KANEMURA , Yukio IMOTO
CPC classification number: F16K25/005 , F16K1/22 , F16K1/222 , F16K1/226 , F16K1/24 , F16K1/32 , F16K31/05 , G21C9/00
Abstract: Provided is a butterfly valve configured so that the sealing performance of the butterfly valve is ensured even if the butterfly valve is exposed to high-temperature fluid and is installed in a high radiation environment. A butterfly valve has: a valve body-side valve seat section which is formed on the outer periphery of a valve body; a valve box-side valve seat section which is formed on a valve box; and a valve movement mechanism which, as a valve shaft pivots, moves the valve body in the direction of extension of a flow passage, between a blocking position at which the valve body-side valve seat section and the valve box-side valve seat section are in contact with each other to close a flow passage, and an open position at which the valve body-side valve seat section and the valve box-side valve seat section are separated from each other to open the flow passage. The valve body-side valve seat section is formed from a laminated material comprising a stainless steel plate and a plate-shaped body which consists of expanded graphite.
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