论文部分内容阅读
建立调压灌溉系统各部分压力变幅的对应关系是合理确定调节压力限的基础。通过管网各节点压力变量的分析及建立水泵机组供水扬程与调压罐压力平衡之间的关系，提出了田间压力变幅、水泵扬程变幅与调压罐压力、水位变幅的直接对应关系，据此可很简便地根据田间灌水质量所要求的田间压力允许变幅及水泵机组经济安全运行所允许的扬程变幅，综合确定调压罐的调节压力限。
Establishing the corresponding relationship between the pressure amplitude changes of various parts of the pressure regulating irrigation system is the basis for reasonably determining the pressure regulating limit. Through the analysis of the pressure variable of every node in the pipeline and the establishment of the pressure balance between the water supply head of the pump unit and the pressure regulating tank, the direct corresponding relationship between the field pressure amplitude change, the head range of the pump, the pressure of the pressure regulating tank and the amplitude of the water level is proposed , Which can be easily based on field water quality requirements of field pressure to allow luffing and pump economy and safe operation of the pump allowed luffing amplitude, a comprehensive determination of the regulatory pressure regulating tank pressure limit.