Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Toshiba Plant Systems & Services Corporation

Tsutomu Ooishi

Yuichi Nakamura

Makoto Takahashi

Yasunori Iwai

Tsutomu Shioyama

Toshihiko Endo

Daisuke Asakura

Hideo Hosaka

Yoshiki Niizeki

Tetsuya Yamanaka

Koji Kanbe

Hiroyuki Tao

Tomoo Ohfuji

Hiroki Shiraishi

Shinji Watanabe

Osamu Shindo

Hisashi Matsuda

Hiroshi Saeki

Masafumi Fukuda

Yoshitaka Fukuyama

Masanobu Watanabe

Fumio Ootomo

Tomoo Oofuji

Hiroryuki Nishi

Taro Kawabata

Hiroyuki Nishi

Daiki Takeyama

Shioyama Tsutomu

A steam turbine pipeof an embodiment includes: an upper half side main steam pipethat leads steam to a steam turbine; an upper half side main steam control valvethat intervenes in the upper half side main steam pipe; and a post-valve drain pipethat is connected to the upper half side main steam control valveand leads drain to an outside. The steam turbine pipefurther includes: a shut-off valvethat intervenes in the post-valve drain pipe; and a branching pipethat makes the post-valve drain pipeon the side closer to the upper half side main steam control valvethan is the shut-off valvecommunicate with the upper half side main steam pipebetween the upper half side main steam control valveand a high-pressure turbine

Steam turbine pipe and pipe

With a simple structure in which the component count is reduced, the occurrence of noise and vibrations can be prevented in a range from a minute opening degree to the vicinity of an intermediate opening degree, and a pressure loss can be decreased when an opening degree is a fully-open opening degree or the vicinity thereof and thus the efficiency of a steam turbine can be improved. A steam governing valve apparatus includes: a valve main bodyin which a valve chestto which steam is supplied is formed; a valve seatin which a spherical curved surface is formed at a position facing the valve chestthat is provided in the valve main body; a valve elementthat is housed in the valve chestand on which a spherical curved surface is formed; and a valve rodthat is provided on an upstream side relative to the valve elementand that drives so that the respective spherical curved surfaces of the valve seatand the valve elementcontact/separate to set a valve opening degree; in which a bottom portion of the valve elementincludes a protruding portionthat protrudes from a middle position thereof to the valve seatside, and an edgethat is formed at a rim so that a recessed portionis formed around the protruding portion

Steam governing valve apparatus and power generation facility

A nozzle boxincludes: a lead-in pipe; a bent pipeconnected to the lead-in pipeand formed so as to change a direction of a channel center lineto an axial direction of a turbine rotor; and an annular pipeconnected to the bent pipeand leading steam to a first-stage nozzlewhile spreading the steam in a circumferential direction of the turbine rotor. In the steam channel lead-in part structure, from an inlet of the lead-in pipetoward an outlet of the annular pipe, steam channel widths Sa-to Sn-in a first direction intersecting with the channel center linegradually increases and steam channel widths Sa-to Sn-in a second direction intersecting with the channel center lineand perpendicular to the first direction gradually decreases.

Nozzle box of axial flow turbine and axial flow turbine

A steam valveincludes: a valve seatbeing accommodated in a steam flow path of a casingprovided with a steam inlet pipeand a steam outlet pipe; and a valve bodycapable of contacting the valve seat, the valve bodybeing accommodated in the steam flow path of the casing. An expansion partthat smoothly projects toward an inside of the steam outlet pipeis disposed at a downstream side on a contact surface of the valve seat

Steam valve and generator set

A steam valve in accordance with the present invention is the steam valve that houses a first valve devicecomposed of a valve seat, a valve body, a valve rod, and a driving device, and a second valve devicecomposed of the valve seat, the valve body, the valve rod, and the driving device, combined with each other in the valve casing, and a closing portionto block a part of a main steam flow flowing from outside to inside of a strainer is formed in the strainerthat is housed in the valve casingand that surrounds the valve bodyof the first valve device. According to the above described configuration, the steam valve that is aimed to further decrease a pressure loss can be provided by effectively controlling the steam flow in the strainer housed in the valve casing.

Steam valve

A high temperature steam valve has a valve casing including a main steam inlet, a main steam outlet and a valve chest. The high temperature steam valve also has a valve seat positioned in the valve chest, a valve element facing the valve seat, and a valve rod slidably penetrating the valve casing to drive the valve element. A cooling steam hole is provided to surround a valve-rod penetrating portion of the valve casing. Cooling steam can be poured into the cooling steam hole from outside through a cooling steam inlet hole and steam having finished heat exchange can be exhausted from a cooling steam outlet hole into the valve chest. The sliding portion between the valve rod provided in the valve-rod penetrating portion of the valve casing and bush is cooled to prevent oxidized scale from depositing on the sliding portion.

High temperature steam valve and steam turbine plant

Growing community of inventors

Yokohama, Japan

Tsutomu Ooishi