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1. 发明专利

JPH086645A FLOW RATE CONTROLLER 失效
公开(公告)号：JPH086645A
公开(公告)日：1996-01-12
申请号：JP14042094
申请日：1994-06-22
申请人： HITACHI LTD , OKANO VALVE SEIZO KK
发明人： KIYOTOKI YOSHIHISA , SAKAMOTO AKIRA , JITSUMATSU TAKAYOSHI , KIKUTA KAORU
IPC分类号： G21C15/24 , F16K3/24 , G05D7/06
摘要： PURPOSE:To effectively suppress cavitation and erosion even in an operation area wherein differential pressure or a high flow velocity is generated transiently and the cavitation and erosion are feared. CONSTITUTION:In the fluid flow passage from a fluid intake 1a to a fluid outlet 1b formed in a body 1, a 1st contraction part formed of an orifice 15 and a cut groove 20, a 1nd contraction part formed of the diameter part 16 of the center part of a sheet 13 and a disk 30, and a 3rd contraction part in labyrinth structure of a multistage groove 31 formed on the disk 30 are provided; and the pressure of fluid is reduced in stages through the 1st, 2nd, and 3rd contraction parts.

2. 发明专利

JP2000104844A AUTOMATIC CONTROL VALVE AND PLANT EQUIPMENT 失效
公开(公告)号：JP2000104844A
公开(公告)日：2000-04-11
申请号：JP27706998
申请日：1998-09-30
申请人： HITACHI LTD , NIGATA MASONEILAN CO LTD
发明人： SHINOHARA HIROYUKI , KIYOTOKI YOSHIHISA , JITSUMATSU TAKAYOSHI , USUDA MITSUO
IPC分类号： F16K25/00 , F16K1/36
摘要： PROBLEM TO BE SOLVED: To provide an automatic control valve provided with a means capable of improving control performance of the automatic control valve by suppressing wear due to sliding of an inside surface of a cage and a plug or a valve element, suppressing lowering of control performance of a plant by improving sealing performance of the inside surface of the cage and the plug or the valve element, improving operation performance of the plant, lengthening a disassembling and inspecting period of the automatic control valve and improving maintenance performance of the plant. SOLUTION: In an automatic control valve in which a plug or a valve element 2 is provided with a seal ring 4 sliding with an inside surface of a cage 3, slides, being guided by the inside surface of the cage 3, adjusts an opening for flow control of the cage 3 and controls flow rate of fluid flowing within a valve box, the inside surface of the cage 3 is coated with ceramics CrN and Ni-resist (austenitic nodular graphite cast iron) is used as the seal ring 4.

3. 发明专利

JPS56133688A DEGASED WATER RECIRCULATION DEVICE 失效
公开(公告)号：JPS56133688A
公开(公告)日：1981-10-19
申请号：JP3611680
申请日：1980-03-24
申请人： HITACHI LTD
发明人： JITSUMATSU TAKAYOSHI , SONODA MASANOBU , SHIRAISHI TADASHI
IPC分类号： G21C15/18 , G21C15/00

4. 发明专利

JPS5946596A Main steam isolation value 失效
标题翻译：主蒸汽隔离值
公开(公告)号：JPS5946596A
公开(公告)日：1984-03-15
申请号：JP15655182
申请日：1982-09-10
申请人： Hitachi Ltd
发明人： TAKESHIMA KIKUO , TAKAHASHI SEIICHI , JITSUMATSU TAKAYOSHI
IPC分类号： F16K31/363 , F01D21/16 , F16K31/122 , G21D1/00
CPC分类号： Y02E30/40

5. 发明专利

JPS55136999A CLEANING FACILITY OF ATOMIC POWER PLANT 失效
公开(公告)号：JPS55136999A
公开(公告)日：1980-10-25
申请号：JP4436979
申请日：1979-04-13
申请人： HITACHI LTD
发明人： JITSUMATSU TAKAYOSHI , TSUJI AKIO
IPC分类号： G21F9/02 , G21C13/00

6. 发明专利

JPS62242183A CONTROL VALVE 失效
公开(公告)号：JPS62242183A
公开(公告)日：1987-10-22
申请号：JP8679086
申请日：1986-04-15
申请人： HITACHI LTD
发明人： TAKESHIMA KIKUO , TAKAHASHI SEIICHI , JITSUMATSU TAKAYOSHI
IPC分类号： F16K1/06 , F01K9/00
摘要： PURPOSE:To reduce the extent of seat ring erosion due to a valve seat leak, by installing a baffle in a valve box at the downstream side. CONSTITUTION:A circular baffle 7, narrowing an outlet passage and keeping pressure inside, is installed inside at the downstream side of a valve box 1 as hung down from the valve box ceiling. The baffle 7 is formed simultaneously by a casting mold at time of producing the valve box. A fluid flowing in from the valve inlet side passes through the narrow valve seat part formed with a cage 2 and a valve body 5. Here, since there is the baffle 7, pressure in a space of a valve outlet part goes up as compared with the conventional case, becoming more than saturated steam pressure. In consequence, a flow velocity at the valve seat outlet is sharply dropped, so that erosion in a seat ring and damage to a bottom part of the valve box come to be brought to nothing there.

7. 发明专利

JPS57124167A Main steam isolator valve 失效
标题翻译：主蒸汽隔离阀
公开(公告)号：JPS57124167A
公开(公告)日：1982-08-02
申请号：JP761781
申请日：1981-01-21
申请人： Hitachi Ltd
发明人： TAKESHIMA KIKUO , TAKAHASHI SEIICHI , JITSUMATSU TAKAYOSHI
IPC分类号： F16K1/00 , F16K1/10 , F16K1/34 , F16K1/36
CPC分类号： F16K1/34
摘要： PURPOSE:To enhance the sealing performance for a main steam isolator valve to be used in a nuclear power plant etc. by choosing the diameter of the poppet seat to a value larger than the height of the poppet guide and thereby increasing stability of the poppet. CONSTITUTION:Air bleeding at the under side of a cylinder actuates drop of a stem 1 and a poppet 3 will begin to sink along a circular guide 10 and a guide surface 11 at the inside of the divergent part 9 of the body 2. The poppet 3 slides on the internal surface to make contact with the point A in the valve seat 8. Even when sliding from this condition does not provide self alignment, the poppet 3 shall fall down being pushed by the stem 1 which will drop by its own weight with the point A as fulcrum, as shown by the arrow, and thereby the pilot hole 15 is blocked. Because the outer diameter of the poppet seat, D, is larger than the height of the poppet guide, L, the point C in the valve seat 8 will at this time make close contact earlier than the point B in the upper part.
摘要翻译：目的：通过将提升阀座的直径选择为大于提升阀导向件的高度，从而提高提升阀的稳定性，从而提高核电厂等使用的主蒸气隔离阀的密封性能。构成：气缸下侧的空气泄漏致动阀杆1的下落，提升阀3将开始沿着主体2的发散部分9的内部的圆形引导件10和引导表面11下沉。提升阀 3在内表面上滑动以与阀座8中的点A接触。即使从这种状态滑动也不能提供自对准，提升阀3将被杆1推动，杆1将被自身的重量下降点A为支点，如箭头所示，从而导向孔15被阻挡。由于提升阀座D的外径大于提升引导件L的高度，因此阀座8中的点C此时将比上部的点B更紧密地接触。

8. 发明专利

JPH05232290A DEVICE AND METHOD FOR CONTROLLING PNEUMATIC TYPE MAIN STEAM SEPARATION VALVE 失效
公开(公告)号：JPH05232290A
公开(公告)日：1993-09-07
申请号：JP3628792
申请日：1992-02-24
申请人： HITACHI LTD
发明人： KIYOTOKI YOSHIHISA , SAKAMOTO AKIRA , JITSUMATSU TAKAYOSHI
IPC分类号： G21D1/00 , G21D3/04
摘要： PURPOSE:To ensure an operation space for a maintenance operation for pneumatic control equipment even when the pneumatic control equipment is made large in size by integration and combination. CONSTITUTION:Pneumatic control equipment 5 is separated from a pneumatic type main steam separation valve 1 and installed on an aseismic rack 10 having an aseismic function being equal to the one of the pneumatic type main steam separation valve 1. The pneumatic control equipment 5 and an air cylinder 2 of the pneumatic type main steam separation valve 1 are connected with each other by an air piping 11. A flexible tube 12 is provided in the middle of the air piping 11, and even when the pneumatic type main steam separation valve 1 is displaced due to heat or others, it absorbs the displacement and prevents occurrence of a strain in the air piping 11.

9. 发明专利

JPS6014662A CONSTRUCTION OF GATE VALVE FIXING DISC AT FULL OPENING 失效
公开(公告)号：JPS6014662A
公开(公告)日：1985-01-25
申请号：JP12028483
申请日：1983-07-04
申请人： HITACHI LTD , OKANO VALVE SEIZOU KK
发明人： TAKESHIMA KIKUO , JITSUMATSU TAKAYOSHI , TAKAHASHI SEIICHI , YAMASHITA YASUHIRO
IPC分类号： F16K3/12 , F16K3/316 , F16K47/00 , F16K3/02
摘要： PURPOSE:To surely suppress vibration of a disc caused by fluid flowing into a bonnet, by providing an adapted member for fixing a jaw part of the disc to be fixed in an internal upper part of the bonnet. CONSTITUTION:A spacer 15 being used as an adapted fixing member is mounted to be integrally welded extending over the internal surface of a bonnet 6 and the bottom part of a neck bush 12, and the spacer 15 is oppositely faced to a disc jaw part 14. A thickness of the spacer 15 is designed and determined so that the spacer 15 may be adapted to an upper surface of the disc jaw part 14 when a gate valve is in its full opening condition. When the gate valve is placed in its full opening condition, a disc 5 is never moved by supporting an upper end of the disc jaw part 14 to be fixed to the spacer 15 even if the side pressure of fluid acts in the bonnet 6.

10. 发明专利

JPS58218815A Sealed terminal box 失效
标题翻译：密封端子盒
公开(公告)号：JPS58218815A
公开(公告)日：1983-12-20
申请号：JP9931082
申请日：1982-06-11
申请人： Hitachi Ltd
发明人： JITSUMATSU TAKAYOSHI , TAKESHIMA KIKUO , OOKURA MINORU
IPC分类号： G21C17/00 , H02G15/10 , H02G15/16

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