在现有的排灌站中,有许多是五十年代和六十年代建的,据统计安徽省这种泵站约占1/3。这些泵站,一般已运行15年至20年,设备已陈旧老化,机泵效率过低,浪费能源严重。改进办法如下: 一、更新水泵五十年代产的PV50型轴流泵与七十年代产的20ZLB—70型轴流泵比较,配套功率都是55千瓦,扬程一样时,PV50的流量比20ZLB—70的少7～22%, Among the existing irrigation and drainage stations, many of them were built in the 1950s and 1960s. According to statistics, such pumping stations in Anhui Province account for about one third. These pumping stations have generally been in operation for 15 to 20 years. The equipment is outdated, the pump efficiency is too low and energy is wasted. Improve the way as follows: First, update the pump 50’s PV50-type axial flow pump and the seventies produced 20ZLB-70-type axial flow pump, the matching power is 55 kW, the same head, PV50 flow rate than 20ZLB- 70% less 7 to 22%