Title:
入口弁及びその改修方法、並びに水力機械設備
Document Type and Number:
Japanese Patent JP6833739
Kind Code:
B2
Abstract:
To provide an inlet valve capable of restricting the hydraulic loss of a hydraulic machine by rectifying the flow around a stay vane by matching the inflow angle of water from a casing to the stay vane to the inlet angle of the stay vane.SOLUTION: A biplane valve 10B comprises: a main plate 21 for closing the water flowing through the inside of a cylindrical valve body; a sub plate 22 disposed to oppose the main plate 21; and a valve body 20 for integrally rotating the main plate 21 and the sub plate 22 around the valve stem extending orthogonal direction to the central axis of the valve body within the valve body. In which, a pair of surfaces 21A and 21B facing each other in the thickness direction of the main plate 21; and a pair of surfaces 22A and 22B facing each other in the thickness direction of the sub plate 22 are curved when viewed in a cross-section perpendicular to the valve stem. When arranged on the upstream of the hydraulic machine and in a fully opened state, the curved surface is convex on the side away from the casing 2.SELECTED DRAWING: Figure 2
More Like This:
Inventors:
Takeo Mukai
Kotaro Tezuka
Keisuke Yoshihara
Kotaro Tezuka
Keisuke Yoshihara
Application Number:
JP2018013857A
Publication Date:
February 24, 2021
Filing Date:
January 30, 2018
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Energy Systems Co., Ltd.
Toshiba Energy Systems Co., Ltd.
International Classes:
F03B3/18; F03B3/02
Domestic Patent References:
| JP61105372A | ||||
| JP56135756A | ||||
| JP2017190695A |
Attorney, Agent or Firm:
Hiroyuki Nagai
Yukitaka Nakamura
Yasukazu Sato
Satoru Asakura
Takeshi Sekine
Kazuya Yamashita
Yoshiki Kanagawa
Yukitaka Nakamura
Yasukazu Sato
Satoru Asakura
Takeshi Sekine
Kazuya Yamashita
Yoshiki Kanagawa