机电排灌工程上需要大量管道,若全部采用金属材料的,不但投资大,耗用的钢铁也多。在无产阶级文化大革命的推动下,我们首先试用了普通钢筋水泥管,但这种管子短、壁厚,比较笨重,接头安装也不方便。后来,又试用了工业上用的承插式预应力水泥管(次品)做水泵出水管,这种管每节较长、壁薄、接头有承插装置,经试用效果很好。如我县新建候家坝水泵站,采用φ500口径承插式预应力水泥管做进、出水管,经五年时间使用证明,既不漏水,也不漏 Electrical and mechanical irrigation and drainage projects require a large number of pipes, if all the use of metal materials, not only investment, consumption of steel and more. In the proletarian cultural revolution, we first tried ordinary reinforced concrete pipe, but this pipe is short, thick wall, more bulky, joint installation is not convenient. Later, and tried the industrial socket prestressed cement pipe (defective) to do the water pump out of the tube, each section of this tube longer, thin wall, the connector socket device, the trial results are good. Such as my county new Houjiaba pumping station, the use of φ500 caliber precast cementing pipe into the outlet pipe, after five years of use proved that neither leakage nor leakage