分析了离心泵接卸铁路轻油槽车出现管路气阻和泵抽空的原因,介绍了通过采用真空辅助轻油卸车工艺控制集气罐内真空度、调节卸油管路最高点和离心泵入口两处绝对压力、消除管路气阻和泵抽空的过程。对真空辅助轻油卸车工艺与正压卸车工艺进行了比较,结果表明,前者安全性高、能耗低、操作方便,具有推广应用价值。 The reason of pipe air resistance and pump evacuation appeared in light truck tanker with light pump was analyzed. The vacuum level in gas receiver tank was controlled by vacuum assisted light truck unloading process. The highest point of the discharge line and the inlet of centrifugal pump were adjusted Department of absolute pressure to eliminate the pipe air resistance and pumping process. The vacuum assisted light truck unloading technology and positive pressure truck technology were compared, the results show that the former safety, low energy consumption, easy operation, with the promotion and application value.