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    • 5. 发明申请
    • STEAM VALVE
    • 蒸汽阀
    • US20170022841A1
    • 2017-01-26
    • US15287145
    • 2016-10-06
    • KABUSHIKI KAISHA TOSHIBA
    • Yuichi NAKAMURATomoo OOFUJITsutomu SHIOYAMATakashi ISEKI
    • F01D17/14F16K1/44F16K1/12
    • A steam valve 10 of an embodiment includes: a valve element 32 of a steam control valve 30, the valve element 32 being provided to be movable in an up and down direction; a valve element 42 of a main stop valve 40, the valve element 42 being provided under the valve element 32 coaxially with the valve element 32 to be movable in the up and down direction; a valve seat 60 with which the valve element 32 and the valve element 42 come into and out of contact; and a guide tube 43 slidably supporting a valve rod 41 including the valve element 42, and having a flange portion 43a at a bottom side in a casing 20. The steam valve 10 further includes: the casing 20 housing the valve element 32, the valve element 42, the valve seat 60, and the guide tube 43; a drain discharge hole 23 formed at a bottom side of the casing 20; a drain pipe 70 provided with a shutoff valve 71 and communicating with the drain discharge hole 23; and a flow direction changing part 80 which changes a direction in which steam having passed between the valve element 32 and the valve seat 60 and flowing along the guide tube 43 flows toward the drain discharge hole 23.
    • 一个实施例的蒸汽阀10包括:蒸汽控制阀30的阀元件32,阀元件32设置成可沿上下方向移动; 主截止阀40的阀元件42,阀元件42与阀元件32同轴地设置在阀元件32的下方,以能够在上下方向上移动; 阀座60,阀元件32和阀元件42通过该阀座60进入和离开接触; 以及导向管43,其可滑动地支撑包括阀元件42的阀杆41,并且在壳体20的底侧具有凸缘部43a。蒸汽阀10还包括:容纳阀元件32的壳体20,阀 元件42,阀座60和引导管43; 形成在壳体20的底面的排水孔23; 设有切断阀71并与排水孔23连通的排水管70; 流过方向改变部80,其改变沿着导向管43流过阀元件32和阀座60之间的蒸汽的流向流向排水孔23的方向。