利用阿基米德原理和杠杆平衡条件设计的自动蓄水的水箱,给人们的日常生活带来方便.这种水箱进水管一般在水箱的底部,利用蓄水后箱中水的压强在阀门上产生的压力与浮球的浮力,通过杠杆平衡,实现箱内水面下降到一定位置时使进水阀自动打开蓄水,水面上升到一定程度时进水阀又自动关闭. The automatic water storage tank designed using the Archimedes principle and the leverage balance condition brings convenience to people’s daily life. The water inlet pipe of this tank is generally at the bottom of the tank, and the pressure of the water in the rear tank is used on the valve. The pressure generated and the buoyancy of the float are balanced by the lever, so that when the water level in the tank falls to a certain position, the water inlet valve automatically opens the water, and the water inlet valve automatically closes when the water level rises to a certain extent.