Title:
DRIVE MECHANISM FOR AIR-OPERATED VALVE
Document Type and Number:
WIPO Patent Application WO/2022/014139
Kind Code:
A1
Abstract:
A drive mechanism (K1) for an air-operated valve (B) according to the present invention comprises: an open/closed state maintenance means (d1, d2, 1, 2, 3, 4) which, upon the occurrence of an abnormality, maintains the open/closed state of the air-operated valve (B) that is operated by operating air (10); and a first closed state switching means (d2) which switches the air-operated valve (B) from an open/closed state maintenance mode to a closed state mode.
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Inventors:
HIRANO SEI (JP)
HIRASAWA DAISUKE (JP)
ONODERA KENJI (JP)
KIYOTOKI YOSHIHISA (JP)
HIRASAWA DAISUKE (JP)
ONODERA KENJI (JP)
KIYOTOKI YOSHIHISA (JP)
Application Number:
PCT/JP2021/018568
Publication Date:
January 20, 2022
Filing Date:
May 17, 2021
Export Citation:
Assignee:
HITACHI GE NUCLEAR ENERGY LTD (JP)
International Classes:
F16K31/122; G21D1/00
Foreign References:
| JP2014173723A | 2014-09-22 | |||
| JPS61120088A | 1986-06-07 | |||
| JP2014085227A | 2014-05-12 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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