US 11,808,371 B2
Gate valve
Takeshi Nishikawa, Abiko (JP)
Assigned to SMC CORPORATION, Tokyo (JP)
Filed by SMC CORPORATION, Tokyo (JP)
Filed on Sep. 29, 2022, as Appl. No. 17/936,566.
Claims priority of application No. 2021-168188 (JP), filed on Oct. 13, 2021.
Prior Publication US 2023/0116364 A1, Apr. 13, 2023
Int. Cl. F16K 3/02 (2006.01); F16K 3/314 (2006.01); F16K 51/02 (2006.01)
CPC F16K 3/0272 (2013.01) [F16K 3/029 (2013.01); F16K 3/314 (2013.01); F16K 51/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A gate valve that is disposed between a first chamber and a second chamber that are adjacent to each other and allows a first opening leading to the first chamber and a second opening leading to the second chamber to be communicated with each other or individually opens and closes the first opening and the second opening, the gate valve comprising:
a valve shaft that extends in an axial direction from a base end side toward a leading end side;
a first valve plate and a second valve plate that are attached to a leading end part of the valve shaft in the axial direction, extending in a direction orthogonal to the axial direction, and have inner surfaces that face the valve shaft and external surfaces on which annular seal members are provided and that face a side opposite to the inner surfaces; and
an operation mechanism that moves the first and second valve plates to an evacuation position at which the first opening and the second opening are communicated with each other, a first closed position at which the first opening is closed by the external surface of the first valve plate, and a second closed position at which the second opening is closed by the external surface of the second valve plate by operating the valve shaft,
wherein the gate valve further comprises:
a fastening mechanism that detachably attaches the first and second valve plates to the leading end part of the valve shaft by disengageably fastening the first and second valve plates and the valve shaft to each other in a state where the inner surface of the first valve plate and the inner surface of the second valve plate are in contact with the leading end part of the valve shaft and the leading end part of the valve shaft is held between the valve plates; and
at least one pair of support mechanisms that disengageably fasten the valve plates to each other at least at both end parts of the first and second valve plates in a longitudinal direction.