To provide a fixed volume water-stopping valve capable of securing a long time of water supply while using a simple arrangement.
A water chamber within a valve drive member 13 is divided into upper and lower chambers by a drive part 14 and a first water hole 13b-1 extending into the first, upper water chamber 21 and a second water hole 13b-2 extending into the second, lower water chamber 22 are formed. When water in the first water chamber 21 is drained from a drain conduit 30 the drive part 14 rises, starting water supply. When the water drained from the first water chamber 21 is blocked, water flows out of the second water chamber 22 at the same time that the water flows into the first water chamber 21, lowering the drive part 14 and seating a valve element 11. Since the operation of the drive part 14 is controlled by the balance of pressure between the first water chamber 21 and the second water chamber 22, a long time of water supply can be secured by keeping slow the speed at which the drive body 14 falls, without the need to increase the capacity of each water chamber. Since the diameter of each water hole can be increased, a water hammer can be prevented and dirt is hardly accumulated.
| JPH0619664 | [Name of device] Urinal flush valve for cold regions |
| WO/1987/002752 | CONTROL STOP FOR FLUSHING SYSTEM |
TOYOKICHI HIDEFUMI
SHIMIZU KOJI
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