Title:
CHECK VALVE
Document Type and Number:
WIPO Patent Application WO/2022/247728
Kind Code:
A1
Abstract:
A check valve (100), comprising a valve body (10) and a piston unit (20). The valve body (10) comprises a valve cavity (11) and a valve port (12). An inlet (13) and an outlet (14) are provided on the valve body (10). The valve port (12) is located between the inlet (13) and the valve cavity (11). The outlet (14) communicates with the valve cavity (11). The piston unit (20) may move axially along the valve body (10) in the valve cavity (11) so as to open/close the valve port (12). The valve cavity (11) comprises an enlarged diameter part (15), and the flow area at the enlarged diameter part (15) is larger than the flow area at the valve port (12). The check valve may increase the flow capacity by avoiding the risk of throttling and flow obstruction.
Inventors:
FENG ZHONGBO (CN)
SONG ZHIGUO (CN)
WANG FUGANG (CN)
SONG ZHIGUO (CN)
WANG FUGANG (CN)
Application Number:
PCT/CN2022/093882
Publication Date:
December 01, 2022
Filing Date:
May 19, 2022
Export Citation:
Assignee:
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD (CN)
International Classes:
F16K1/38; F16K1/32; F16K1/46; F16K15/02; F16K27/02
Foreign References:
| CN215980975U | 2022-03-08 | |||
| CN212080251U | 2020-12-04 | |||
| CN202901348U | 2013-04-24 | |||
| GB988894A | 1965-04-14 | |||
| US20110033313A1 | 2011-02-10 | |||
| US20040061086A1 | 2004-04-01 | |||
| CN208221675U | 2018-12-11 | |||
| CN201735760U | 2011-02-09 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (HANGZHOU) (CN)
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