摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water level adjustment device, for operating only by a mechanical mechanism, installable in anyplace of a paddy field, also reducing the number of part items, being compact, and capable of adjusting a water level of the paddy field in a constant range.SOLUTION: A water level adjustment device comprises a water intake port for communicating with the irrigation channel side, a casing having a water supply port for communicating with the paddy field side, a float movably provided in the substantially vertical direction inside the water supply port side of the casing and a valve installed on a first rotary shaft provided in an upper end part of a horizontal part of the water supply port and is constituted so as to open the water intake port when the valve rotates to the irrigation channel side in response to a descent of the float. The connection of the float and the valve is executed by a second rotary shaft provided in a holding member installed on the substantially upper end of a shaft extending above the substantial center of the float and a rod-like member having both ends rotatably installed on a third rotary shaft installed on an opposite side surface of the water intake port side of the valve.</p> |