VARIABLE ORIFICE INSTALLED IN A RAINWATER TANK FOR RAINWATER USE AND FLOOD CONTROL

摘要

PURPOSE: An irrigation and flood control rainwater storage facility including a variable orifice is provided to reduce costs and to be easily maintained by improving efficiency of two spaces according to the change of a water level due to rainwater usage and the inflow of the rainfall. CONSTITUTION: An irrigation and flood control rainwater storage facility including a variable orifice comprises a water storage tank(200), an initial rainwater segregation tank(100), a variable orifice unit(300), a driving unit, pumping units(510,520), and a pipe conduit unit. The water storage tank is installed on one side of the initial rainwater segregation tank. The variable orifice unit is installed in the water storage tank and discharges rain water over a predetermined water level to the outside. The initial rainwater segregation tank comprises a deposit discharge pipe(130) and a supernatant discharge pipe(140). The variable orifice unit comprises an inlet pipe, an outlet pipe, and a bellows pipe.