Water safety shut-off valve

摘要

The present invention is a water conservation safety shut-off valve assembly for use on locations which normally have intermittent water usage but need to indicate when there is constant water usage, such as a leak. The valve assembly has a valve body with a fluid pathway and a valve plug held in an open position allowing water to flow through the pathway. As water flows through the pathway, a sensing device detects water flowing through the pathway and starts a timer. The valve closes the pathway, stopping the flow of water through the valve assembly when the time elapses. The valve assembly indicates whether the valve plug is in an open or closed position.

主权项

1. A fluid shut-off valve assembly comprising:
a valve body having a fluid passageway, wherein in at least a portion of the fluid passageway is sensor monitored for flow detection; a valve stem having a valve plug moveable between an open position and a closed position; a flow detection device having:
(a) a linearly moveable ram within the portion of the fluid passageway and configured to selectively move within an electromagnetic coil upon flow of fluid through the fluid passageway, wherein the moveable member within the electromagnetic coil alters inductance of the electromagnetic coil;(b) a sensor configured to detect the altered inductance of the electromagnetic coil and thereby displacement of the moveable ram and the flow of fluid through the fluid passageway; a magnetic circuit electrically connected to the flow device and having a magnet and a latch, with the magnet normally maintaining The valve plug in an open position; a timer operably associated with the flow detection device and electronicaly connected to the magnetic circuit, wherein the timer is configured to time duration of fluid flowing through the passageway, and to energize the coil after a pre-set time set period expires, to thereby open the latch to allow the valve plug to close.