Based on the continuity equation and Bernoulli's equation, the Inlfuencing factors on the mean lfow rate of liquid emerging from a siphon are discussed. Then a siphon destruction testing apparatus is designed and constructed to investigate the siphon destruction mechanism of a drainpipe. Based on this, the design scheme and operating principle of a novel accident oil pool are expounded. It is found that the 90 ° elbow connected to the end of a oil-water intake pipe and the staggered partitions set up in the oil-water separation chamber can effectively ameliorate the lfow pattern. It is also found that the communicating hole set up within a sump both implements hydraulic seal and increases effective oil storage volume. Moreover, a L-shaped air inlet pipe below the hump of a U-shaped drainpipe can effectively trigger siphon destruction. In addition, the rainwater well should be laid out near the accident oil pool to reduce the frictional head loss, thereby to realize high-speed drainage.%基于连续性方程和伯努利方程，探讨了虹吸管内液体平均流速的影响因素。设计并制作了虹吸破坏试验装置，用于研究排水管的虹吸破坏机制。在此基础上，详细阐述了新型事故贮油池的设计方案及工作原理。研究表明：在进油水管的端部设置90°弯头，并在油水分离室内设置交错隔墙，能有效改善整流效果；将连通孔布置于集水坑内，既可实现水封，又能增加有效储油容积；设置于U形排水管驼峰段下方的L形进气管，能有效触发虹吸破坏，避免事故油排出池外，造成环境污染；此外，排水管外接的雨水井应就近布置，以减小沿程水头损失，从而实现快速排水。
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