| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve structural body for a tank utilizing rainwater and drain water and a liquid supply control mechanism capable of supplying supply water automatically, reducing cost of facility, facilitating maintenance work, and setting a start water level and a stop water level of supply water freely without requiring feeding of electricity and an electric controller when amount of supply of raw water such as rainwater is insufficient. SOLUTION: In this valve structural body, diameter of a valve seat is larger than diameter of a balance guide, an energizing means 22 is attached to an upper part of the balance guide, and an energizing force adjusting means for energizing force for closing a valve element is provided to adjust the energizing force. A string-like body 9C is attached to a lever mechanism 9A, a second stopper 14 is attached to a lower end of the string-like body, and a first stopper 15 is attached to a part close to an upper end. A float 9B is constituted to move freely along the string-like body. A regulation means 26 is provided on a lever to prevent the valve element from being opened when a water level lowers again after the valve element is closed so that a start water level and a stop water level of supply water can be selected and set freely. COPYRIGHT: (C)2007,JPO&INPIT
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