| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operating valve type flowing water detector applicable also to a large bore without energizing a valve element in an opening direction. <P>SOLUTION: The flowing water detector includes a detection rod displaceable while being engaged with the valve element, and one end side of the detection rod is held in the engaged state with the valve element in a valve closed state. A switch device is disposed on the other end side of the valve element, and the switch device is turned on/off by the displacement of the detection rod displaced while being engaged with the valve element by turning of the valve element in the opening direction. The detection rod engaged with the valve element is displaced with turning of the valve element, but engagement with the valve element is released when the detection rod is displaced into a predetermined position, and the detection rod is held in that position by a valve opening time holding means. When the valve element returns into the valve closed state from the open state, the valve element returns into the valve closed state while being engaged with the detection rod held by the valve opening time holding means, and the detection rod returns into the original valve closed time position. <P>COPYRIGHT: (C)2012,JPO&INPIT |
