针对微灌工程中灌水器堵塞的问题,通过大量的水力性能测试和反冲洗性能试验,探讨了叠片式砂过滤器当滤管直径一定时的最佳叠片数,提出叠片式砂过滤器的水力性能特性方程和过滤水头损失公式,试验证实所建立的叠片式砂过滤器的水头损失公式比原有经验公式的计算精度高,即在设计流速条件下误差仅为3.18%,为开发研究新型砂过滤器提供参考。 Aiming at the problem of emitter blockage in micro-irrigation project, through a large number of hydraulic performance test and backwash performance test, the optimal laminated number of laminated sand filter when the diameter of filter tube is constant is discussed. The hydraulic characteristic equation of the device and the formula of the filter head loss are validated. The experimental results show that the head loss formula of the laminated sand filter is higher than the original empirical formula, that is, the error is only 3.18% at the designed flow rate, Development of new sand filter for reference.