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    STEAM VALVE AND STEAM TURBINE SYSTEM
    1.
    发明申请
    STEAM VALVE AND STEAM TURBINE SYSTEM 审中-公开

    公开(公告)号：US20180252320A1

    公开(公告)日：2018-09-06

    申请号：US15770372

    申请日：2016-10-21

    Applicant: Mitsubishi Hitachi Power Systems, Ltd.

    Inventor： Kensuke FUTAHASHI ,  Hiroyuki KANAZAWA ,  Kengo IMAOKA ,  Katsuhisa HAMADA

    IPC: F16K1/44 ,  F01D17/10 ,  F16K47/02

    CPC classification number: F16K1/443 ,  F01D17/10 ,  F01D25/00 ,  F05D2220/31 ,  F16K1/44 ,  F16K47/02 ,  Y10T137/87917

    Abstract: A steam valve includes a valve casing, a first valve body having a first cylindrical part and a first end wall part, a second valve body having a second cylindrical part and a second end wall part, a first valve stem capable of vertically biasing the first valve body, a second valve stem capable of vertically biasing the second valve body, a flow guide disposed inside the first cylindrical part and having a projection configured to project downwardly from the first cylindrical part and the second cylindrical part when the first cylindrical part and the second cylindrical part are apart from the valve seat, and a support supporting the flow guide. The support extends from the valve casing or the second valve body to the flow guide through a through hole formed in the first valve body to support the flow guide such that the flow guide is tiltable.

    MAIN STEAM VALVE AND STEAM TURBINE
    2.
    发明申请
    MAIN STEAM VALVE AND STEAM TURBINE 审中-公开

    公开(公告)号：US20170306793A1

    公开(公告)日：2017-10-26

    申请号：US15517784

    申请日：2015-10-21

    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

    Inventor： Tomoshige TAKATA ,  Katsuhisa HAMADA ,  Kensuke FUTAHASHI

    IPC: F01D25/10 ,  F01D17/08

    CPC classification number: F01D25/10 ,  F01D17/085 ,  F01D17/145 ,  F16K1/34 ,  F16K1/54 ,  F16K47/08

    Abstract: A main steam valve includes a cylindrical guide centered about an O-axis, a valve body disposed inside the guide so as to be slidable in the O-axis direction, a valve shaft on which the valve body moves in the O-axis direction between open and closed positions, and a casing having a flow path and a valve seat formed on an inner surface thereof. The flow path guides out a fluid guided into the casing from the inflow direction along the O-axis direction. The valve body abuts against the valve seat when the valve body is in the closed position. A valve chamber, formed in the casing, has a baffle plate provided in a region between an outer circumferential surface of the guide and an inner surface of the casing. The baffle plate interrupts swirling vortex flow with spiral vortex core extending in the circumferential direction of the O-axis of the guide.

    STEAM VALVE AND STEAM TURBINE SYSTEM
    3.
    发明申请
    STEAM VALVE AND STEAM TURBINE SYSTEM 审中-公开

    公开(公告)号：US20180340627A1

    公开(公告)日：2018-11-29

    申请号：US15771518

    申请日：2016-11-04

    Applicant: Mitsubishi Hitachi Power Systems, Ltd.

    Inventor： Kensuke FUTAHASHI ,  Hiroyuki KANAZAWA ,  Kengo IMAOKA ,  Katsuhisa HAMADA

    IPC: F16K31/44 ,  F01D17/10 ,  F16K1/44

    Abstract: A steam valve includes: a valve casing; a first valve body; a second valve body; a second valve rod; a first valve rod; a first actuator capable of applying a first biasing force in the vertical direction to the first valve rod; a second actuator capable of applying a second biasing force in the vertical direction to the second valve rod; a first link mechanism disposed between the first actuator and the first valve rod and capable of transmitting the first biasing force; a second link mechanism disposed between the second actuator and the second valve rod and capable of transmitting the second biasing force, the second link mechanism having a linking part provided integrally with the second valve rod and a lever which is pin-coupled to the linking part; and a guide mechanism capable of regulating horizontal displacement of the linking part.

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