| 摘要 |
A device for protecting irrigation land local flooding caused by damaged sprinklers or broken risers. The device, in accordance with the present invention is designed to be situated within a piping component upstream of each individual sprinklers and it is completely enclosed within the piping component. The device detects and responds to the excess flow caused by damaged sprinkler or broken riser by shutting off water to the damaged sprinkler. In so doing, the device allows the remainder of the irrigation circuit to operate without interruption, albeit temporarily without the service of the damaged sprinkler. The device has no external housing and therefore the component itself is not vulnerable to physical damage from outside. The device has a delayed shut-off mechanism which allows it to identify transient flow surges which accompany many sprinkler systems start-ups and the elevated flow resulting from damage to a sprinkler branch and it also has the capability to clean out debris which might collect in the pipe line.
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