US 12,241,557 B2
Check valve for cryogenic fluid
Seungho Han, Seoul (KR); Hyolim Kang, Busan (KR); Juhyang Park, Busan (KR); and Haeseong Hwang, Busan (KR)
Assigned to DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION, Busan (KR)
Appl. No. 18/271,607
Filed by DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION, Busan (KR)
PCT Filed Dec. 8, 2021, PCT No. PCT/KR2021/018517
§ 371(c)(1), (2) Date Jul. 10, 2023,
PCT Pub. No. WO2022/177112, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 10-2021-0023656 (KR), filed on Feb. 22, 2021.
Prior Publication US 2024/0052937 A1, Feb. 15, 2024
Int. Cl. F16K 15/03 (2006.01); F16K 47/02 (2006.01)
CPC F16K 15/034 (2021.08) [F16K 47/023 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A check valve for cryogenic fluid, comprising:
a valve body, which is open at both ends thereof and formed to have an inlet and an outlet;
a valve seat formed inside the valve body to communicate with the inlet;
a disk pivoted up and down at an upper end thereof around a pivot axis provided in the valve body to open and close the valve seat;
a valve seat seal made of metal contracted and deformed by cryogenic fluid introduced through the inlet, and provided in a circumferential direction of the valve seat, wherein the valve seat seal is configured to bring into close contact with an edge portion of the disk to produce sealing effects when the disk closes the valve seat;
an insulating pocket fixedly attached to a rear surface of the disk, being made of polyurethane foam to insulate an internal space thereof, and configured to directly contact an upper end of the valve body when the disk is rapidly opened due to a pressure of the cryogenic fluid;
an elastic buffer positioned within the insulating pocket and configured to absorb impact generated when the insulating pocket hits the upper end of the valve body as a result of a rapid opening of the disk; and
a support plate positioned within the insulating pocket between the insulating pocket and the elastic buffer to support the elastic buffer.