The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2010
Filed:
Nov. 29, 2007
Yasunari Shibata, Nagasaki, JP;
Yoshinori Koyama, Nagasaki, JP;
Soken Takase, Nagasaki, JP;
Taizo Hoshino, Uonuma, JP;
Shuji Kameyama, Iwaki, JP;
Yasuhiro Suzuki, Iwaki, JP;
Yoshihiko Horie, Iwaki, JP;
Hitoshi Terada, Iwaki, JP;
Hirofumi Yamada, Iwaki, JP;
Yasunari Shibata, Nagasaki, JP;
Yoshinori Koyama, Nagasaki, JP;
Soken Takase, Nagasaki, JP;
Taizo Hoshino, Uonuma, JP;
Shuji Kameyama, Iwaki, JP;
Yasuhiro Suzuki, Iwaki, JP;
Yoshihiko Horie, Iwaki, JP;
Hitoshi Terada, Iwaki, JP;
Hirofumi Yamada, Iwaki, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Hirata Valve Industry Co., Ltd., Kawasaki-shi, JP;
Clean Coal Power R&D Co., Ltd., Iwaki-shi, JP;
Hokkaido Electric Power Co., Incorporated, Sapporo, JP;
Tohoku Electric Power Co., Inc., Sendai, JP;
The Tokyo Electric Power Co., Inc., Tokyo, JP;
Chubu Electric Power Co., Inc., Nagoya-shi, JP;
Hokuriku Electric Power Co., Toyama-shi, JP;
The Kansai Electric Power Co., Inc., Osaka, JP;
The Chugoku Electric Power Co., Inc., Hiroshima, JP;
Shikoku Electric Power Co., Inc., Takamatsu, JP;
Kyushu Electric Power Co., Inc., Fukuoka-shi, JP;
Electric Power Development Co., Ltd., Tokyo, JP;
Central Research Institute of Electric Power Industry, Tokyo, JP;
Abstract
An object is to provide a gate valve capable of preventing operational deficiencies caused by particulate materials accumulating in a valve box, thus providing superior sealing properties and high durability, having a simple structure, and allowing inspection and maintenance to be performed easily. A gate valve installed in a transport line for transporting fluid containing particulate material at a coal gasification plant includes a valve box having an inlet portion and an outlet portion in which a channel constituting a part of the transport line is formed; a valve unit, provided between the inlet portion and the outlet portion, which extends in an opening-and-closing direction orthogonal to an axial direction of the channel, and which is movable in the opening-and-closing direction; a wedge plate provided between the valve unit and the inlet portion so as to extend in the opening-and-closing direction; and a guide plate provided between the valve unit and the outlet portion so as to extend in the opening-and-closing direction. Areas between the valve unit and the wedge plate and between and the valve unit and guide plate are sealed by means of surface contact.