US 11,885,226 B2
Steam valve, and steam turbine equipment comprising same
Fumiyuki Suzuki, Yokohama (JP); Masaki Hata, Yokohama (JP); and Megumu Tsuruta, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/921,162
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
PCT Filed Apr. 28, 2021, PCT No. PCT/JP2021/016966
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2021/230086, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 2020-085245 (JP), filed on May 14, 2020.
Prior Publication US 2023/0167749 A1, Jun. 1, 2023
Int. Cl. F01D 17/14 (2006.01); F16K 31/52 (2006.01)
CPC F01D 17/145 (2013.01) [F16K 31/52 (2013.01); F05D 2220/31 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A steam valve comprising:
a valve casing in which a flow path for steam is formed inside;
a valve body that linearly reciprocates in the valve casing to open and close the flow path;
a valve stem connected to the valve body;
an actuator that moves the valve stem;
a heat buffer member mounted to the valve casing;
a link mechanism that transmits an operation of the actuator to the valve stem; and
a link base that supports the link mechanism,
wherein the valve stem has a base end portion connected to the valve body and a tip portion located outside the valve casing, and extends in a moving direction of the valve body from the base end portion,
the heat buffer member includes a heat buffer plate separated from the valve casing toward a tip side, which is a side of the tip portion with respect to the base end portion in an axial direction in which the valve stem extends, out of the tip side and a base end side on a side opposite to the tip side, and a support column that fixes the heat buffer plate to be immovable relative to the valve casing,
the actuator includes an actuator casing, and an actuator rod that extends in the axial direction from an inside of the actuator casing and that moves in the axial direction with respect to the actuator casing,
the link base is fixed to the heat buffer member and extends from the heat buffer member in an axis-perpendicular direction perpendicular to the axial direction,
the actuator casing is fixed to the link base, and
the link mechanism is disposed on the tip side with respect to an edge on the base end side of the link base.