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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.:

US 11384863 B1

PDFFull Text
Date of Patent:
Jul. 12, 2022

Filed:

Nov. 27, 2019

Steam valve, power generation system, and inspection method for steam valve

Applicant:

Mitsubishi Heavy Industries, Ltd., Tokyo, JP;

Inventors:

Noriyuki Hasegawa, Tokyo, JP;

Kensuke Futahashi, Tokyo, JP;

Megumu Tsuruta, Tokyo, JP;

Assignee:

MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Jessica Cahill

Int. Cl.
CPC ...
F16K 47/00 (2006.01); F16K 1/42 (2006.01); F16K 31/122 (2006.01); F16K 37/00 (2006.01); F16K 1/44 (2006.01); F16K 31/56 (2006.01); F16K 31/383 (2006.01); F16K 1/00 (2006.01); F16K 27/02 (2006.01); F01D 17/10 (2006.01); F01K 13/00 (2006.01); F01K 13/02 (2006.01);
U.S. Cl.
CPC ...
F16K 47/00 (2013.01); F01D 17/10 (2013.01); F16K 1/00 (2013.01); F16K 1/42 (2013.01); F16K 1/443 (2013.01); F16K 27/02 (2013.01); F16K 31/1223 (2013.01); F16K 31/1226 (2013.01); F16K 31/383 (2013.01); F16K 31/56 (2013.01); F16K 37/005 (2013.01); F01K 13/003 (2013.01); F01K 13/02 (2013.01);
Abstract

A steam valve has a tubular stop valve configured to move toward an upper end side and a lower end side along an axial direction when the stop valve is opened and closed respectively; and a valve main body configured to accommodate the stop valve. The stop valve has a ring-shaped protrusion portion protruded outwardly in a radial direction. The valve main body has an accommodation space for accommodating the protrusion portion which is divided by the protrusion portion into a first pressure space and a second pressure space. First and second feed/discharge portions configured for adjusting a pressure in the first pressure space and the second pressure space respectively are further provided. The protrusion portion is moved upwardly and downwardly by adjusting the pressure in the first pressure space and the second pressure space.

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