在泵站测试和节能技术改造过程中,为提高管路效率,减少管路出口的阻力损失。我县在1982年对出水管路出口处局部增装渐扩管与不装渐扩管进行了对比试验。结果表明:仅单从出水口局部增装渐扩管后,管路效率可提高3.0％以上,每提高1％的泵站装置效率, In the pumping station testing and energy-saving technological transformation process, in order to improve the efficiency of the pipeline, reduce the resistance loss of the pipeline exit. My county in 1982 on the exit of the outlet pipe to expand the expansion tube with no expansion tube was contrasted. The results show that the pipe efficiency can be increased by more than 3.0% after only the expansion pipe is partially installed from the outlet, and for every 1% increase in pumping station efficiency,