Title:
MULTI-FUNCTIONAL VALVE HAVING WATER HAMMER PREVENTION FUNCTION AND HAVING GATE VALVE, FAST-CLOSING CHECK VALVE, SLOW-CLOSING AUXILIARY VALVE, AND NEGATIVE-PRESSURE-ACTIVATED AIR INTAKE VALVE
Document Type and Number:
WIPO Patent Application WO/2016/163344
Kind Code:
A1
Abstract:
[Problem] Multi-functional valves have a check valve and water stop valve function, a water hammer prevention function, and a valve body forced movement function for enabling the release of water from inside a valve and resolving poor valve body operation. However, in order to further improve the water hammer prevention function, the present invention provides a multi-functional valve in which a slow-closing auxiliary check valve for discharging reverse flow pressure and a negative-pressure-activated air intake valve are provided to approximate a non water hammer state. [Solution] A pair of magnets and/or compression springs are disposed in a valve body and/or a member for closing an escape path, and a slow-closing auxiliary check valve for discharging reverse flow pressure and a negative-pressure-activated air intake valve are provided to the bottom part of the valve body.
More Like This:
| WO/2016/010316 | NON-POWERED BACKFLOW PREVENTION APPARATUS |
Inventors:
TANABE SEIKAI (JP)
Application Number:
PCT/JP2016/061062
Publication Date:
October 13, 2016
Filing Date:
April 05, 2016
Export Citation:
Assignee:
AKKU TOHOKU CORP (JP)
International Classes:
F16K15/02; F16K15/18
Foreign References:
| US20050166971A1 | 2005-08-04 | |||
| JPS5214222A | 1977-02-03 | |||
| JP2013221615A | 2013-10-28 | |||
| JP2006029573A | 2006-02-02 |
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