以往,在计算带有自闭式冲洗阀卫生间的给水管道时,一个大便器自闭式冲洗阀的给水额定流量为1.2升/秒,相当于6个普通水龙头给水额定流量的总和。这对各种建筑物室内给水管道按当量数计算设计秒流量有很大的影响。为此,我们结合60年代教科书中关于住宅建筑有自闭式冲洗阀给水秒流量计算公式和各类公共建筑物设计秒流量计算 In the past, when calculating a water supply pipe with a self-closing flushing toilet, the water supply rated flow of a toilet self-closing flushing valve was 1.2 liters/second, which is equivalent to the sum of the six nominal tap water supply flow rates. This has a great influence on the calculation of the designed second-second flow rate for various building indoor water supply pipes. To this end, we combined the calculation formula of the second-second flow rate of water supply for self-closed flush valves in residential buildings and the calculation of second-phase flow rate for various types of public buildings in the textbooks of the 1960s.