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喷灌系统中各处压力的均衡是确保各项技术要求和较高的经济效益的重要前提之一。在利用水泵加压的管道式喷灌系统中,当管道系统较长或地面高差较大时,由于管道的摩擦水头损失较大或因地形升高损失压力水头较多,常使近处和远处(或低处和高处)的喷头的压力相差悬殊。这样不仅难于保证各处灌水量的一致,无法实现设计要求的均匀度、喷灌强度和雾化程度等各项技术指标,甚或使喷头不能正常工作,水泵不能
Spray irrigation system pressure throughout the balance is to ensure that the technical requirements and high economic efficiency of the important premise. In the use of water pump pressure pipe sprinkler system, when the pipe system is long or the ground elevation difference is large, due to the pipeline friction head loss greater or due to the loss of the topography pressure head more often near and far Office (or low and high) of the pressure difference between the nozzle. This is not only difficult to ensure consistent throughout the irrigation amount, can not achieve the uniformity of design requirements, irrigation intensity and degree of atomization and other technical indicators, or even the nozzle does not work, the pump can not