Patents by Inventor Takuhiro TSUNEKAWA

Takuhiro TSUNEKAWA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Steam turbine valve abnormality monitoring system, steam turbine valve drive device, steam turbine valve device, and steam turbine plant
    Patent number: 11933183
    Abstract: A steam turbine valve abnormality monitoring system according to an embodiment includes a detection unit detecting the state of a steam turbine valve or a steam turbine valve drive device, a determination unit, and an abnormality processing unit. Based on the detected result of the detection unit, the determination unit determines whether or not an abnormality has occurred in the opening degree control of the steam turbine valve. The abnormality processing unit issues an alarm or issues a turbine stop command when the determination unit determines that an abnormality has occurred in the opening degree control of the steam turbine valve.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: March 19, 2024
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Takuhiro Tsunekawa, Yuichi Nakamura, Hisashi Goto, Hiroyuki Miya
  • STEAM TURBINE VALVE ABNORMALITY MONITORING SYSTEM, STEAM TURBINE VALVE DRIVE DEVICE, STEAM TURBINE VALVE DEVICE, AND STEAM TURBINE PLANT
    Publication number: 20210388735
    Abstract: A steam turbine valve abnormality monitoring system according to an embodiment includes a detection unit detecting the state of a steam turbine valve or a steam turbine valve drive device, a determination unit, and an abnormality processing unit. Based on the detected result of the detection unit, the determination unit determines whether or not an abnormality has occurred in the opening degree control of the steam turbine valve. The abnormality processing unit issues an alarm or issues a turbine stop command when the determination unit determines that an abnormality has occurred in the opening degree control of the steam turbine valve.
    Type: Application
    Filed: June 14, 2021
    Publication date: December 16, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Takuhiro TSUNEKAWA, Yuichi NAKAMURA, Hisashi GOTO, Hiroyuki MIYA
  • Steam turbine valve drive apparatus
    Patent number: 10871080
    Abstract: A steam turbine valve drive apparatus in an embodiment includes a piston, a cylinder, a bidirectional pump, a servo motor, and a quick closing mechanism. The cylinder houses the piston in an inner space thereof, the inner space being partitioned by the piston into a first hydraulic chamber and a second hydraulic chamber. The quick closing mechanism executes a quick closing operation of closing the steam valve unit more quickly than the closing operation. Here, the quick closing mechanism executes the quick closing operation by feeding the working oil accumulated in an accumulator to the second hydraulic chamber and draining the working oil from the first hydraulic chamber.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: December 22, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions Corporation
    Inventors: Takuhiro Tsunekawa, Yuichi Nakamura, Koichi Nagaishi, Toshihiko Endo, Hisashi Goto
  • STEAM TURBINE VALVE DRIVE APPARATUS
    Publication number: 20180216485
    Abstract: A steam turbine valve drive apparatus in an embodiment includes a piston, a cylinder, a bidirectional pump, a servo motor, and a quick closing mechanism. The cylinder houses the piston in an inner space thereof, the inner space being partitioned by the piston into a first hydraulic chamber and a second hydraulic chamber. The quick closing mechanism executes a quick closing operation of closing the steam valve unit more quickly than the closing operation. Here, the quick closing mechanism executes the quick closing operation by feeding the working oil accumulated in an accumulator to the second hydraulic chamber and draining the working oil from the first hydraulic chamber.
    Type: Application
    Filed: January 4, 2018
    Publication date: August 2, 2018
    Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions Comparation
    Inventors: Takuhiro TSUNEKAWA, Yuichi NAKAMURA, Koichi NAGAISHI, Toshihiko ENDO, Hisashi GOTO