| 摘要 |
PURPOSE:To make the intake and sealing of water simply and completely by using a bellows-like soft tube at the intake port. CONSTITUTION:An intake port 8 provided to an intake tank 1 is pressed by the coupling of two coupling levers 14 and 16 in a vertically movable control mechanism 11, a water level detection mechansim 20 is set in a paddy field, and the rope 23 of a float 22 is connected to the lower end of the coupling lever 14 by adjusting its length by a chain 26. Water flows from the intake port 8 into the paddy field under the condition, but when the water level rises, the float 22 goes up to the water surface and the rope 23 is tensed, whereupon the coupling lever 14 turns to the left and the coupling portions 17 and 18 of both the coupling levers are released. By this, the intake port 8 rises and is exposed by the actions of the rubbery bellows tube 7 and the float 10, the flow of water is stopped, and the intake port 8 is coupled. Thus, the inflow of water can be completely stopped until the intake of water is needed. |
