DRAIN WATER TANK PREVENTING LEAK BY REDUCING HYDRAULIC PRESSURE OF WATER DRAINING THROUGH OUTFLOW PIPE IN WATER RESERVOIR STORING, SUPPLYING AND DRAINING WATER

摘要

PURPOSE: A drain water tank is provided to store water in the main water tank to the maximum water level regardless of the water level of the main water tank, and to control the hydraulic pressure properly in draining water through the outflow pipe by regulating the water level of the auxiliary water tank. CONSTITUTION: A drain water reservoir is composed of a main water tank(10) having an inlet pipe(12) supplying water, an outlet pipe(15) draining water, a flow meter(14) installed in the inlet pipe and the outlet pipe and a water gauge(13); an auxiliary water tank(20) formed in the main water tank, separated from the main water tank by a partition wall and connected to the outlet pipe; a valve(26) formed at the side of the auxiliary water tank and opened or closed; and an auxiliary water gauge(23) placed in the auxiliary water tank to detect the water level of the auxiliary water tank. Water is discharged through the outlet pipe with hydraulic pressure of the auxiliary water tank.