某油库5台喂油泵在停运时,均因泵出口阀和单向阀间管段存在憋压而出现在阀法兰处渗漏原油现象。本文分析了憋压存在的原因:喂油泵停运时,出口阀和单向阀管段间形成密闭储油管段,原油受热膨胀后压力不能泄掉。为此,制定了3种解决方案:①人工开关阀门泄压;②在密闭管段上端设置一个跨接膨胀管;③将泵的单向阀与出口阀互换位置。通过比较,优选出了最佳方案。 Oil depot 5 sets of pumps in the shutdown, both due to pump outlet valve and the check valve between the existence of pressure in the valve flange at the leakage of crude oil phenomenon. This paper analyzes the existence of pressure reasons: feed pump outage, the outlet valve and the one-way valve pipe section between the formation of a closed oil storage section, crude oil after the expansion of the pressure can not escape. To this end, developed three kinds of solutions: ① manual switching valve pressure relief; ② in the upper end of the closed pipe set up a crossover expansion tube; ③ the pump one-way valve and the outlet valve interchangeable position. By comparison, the best solution is preferred.