Title:
WATER STOP VALVE
Document Type and Number:
WIPO Patent Application WO/2018/137052
Kind Code:
A1
Abstract:
Disclosed is a water stop valve, wherein a water sealing surface (13) is disposed between a water inlet channel (11) and a water outlet channel (12), and a cavity (14) is formed in a valve body (1) above the water sealing surface (13); a back-pressure hole (31) is formed in a water plugging stopper (3); a lower portion of a valve stem (2) moves up and down so as to be inserted and installed into the back-pressure hole (31) in the water-plugging stopper (3); the water-plugging stopper (3) is placed in the cavity (14) and forms a water-passing gap with the cavity (14); a back-pressure cavity (16) is formed above the water-plugging stopper (3); and a sealing end surface (22) matching the back-pressure hole (31) is formed on the valve stem (2). When the valve stem (2) moves upwards, the sealing end surface (22) opens the back-pressure hole (31) and the water inlet channel (11) is in communication with the water outlet channel (12) to feed in water; and when the valve stem (2) moves downwards and drives the water plugging stopper (3) to move downwards, the sealing end surface (22) blocks the back-pressure hole (31) and the water plugging stopper (3) blocks the water sealing surface (13), such that the water enters the back-pressure cavity (16) via the water-passing gap, and the water pressure enables the water-plugging stopper (3) to block the water sealing surface (13) to stop the water. The water stop valve is capable of stopping a water inlet valve from feeding in water in a timely manner.
Inventors:
LIU YONGMAO (CN)
ZHANG ZIPENG (CN)
ZHANG ZIPENG (CN)
Application Number:
PCT/CN2017/072317
Publication Date:
August 02, 2018
Filing Date:
January 24, 2017
Export Citation:
Assignee:
LAB XIAMEN SANITARY FITTINGS INC (CN)
International Classes:
F16K31/24; E03D1/32
Foreign References:
| CN102466045A | 2012-05-23 | |||
| CN105221820A | 2016-01-06 | |||
| CN102704556A | 2012-10-03 | |||
| CN2937690Y | 2007-08-22 | |||
| JP5962885B2 | 2016-08-03 | |||
| JP5648179B2 | 2015-01-07 | |||
| KR100564167B1 | 2006-03-27 |
Attorney, Agent or Firm:
XIAMEN SHINHWA PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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