滴灌系统的组成与规划设计讲解.ppt

膜下滴灌系统的组成与规划设计 The Component and Design of Drip Irrigation System under Mulch Film ;1、膜下滴灌系统的组成Component of Drip Irrigation System under Mulch Film ;1.水源 Water Source 2．水泵 Pump 3.供水管 Water Supply Pipe 4.蓄水池 Pond 5.逆止阀 Backflow Prevention Device 6.施肥开关 Fertilizer valve 7. 灌水总开关 Irrigation Head Valve 13. 滴头 Emitter 14. 毛管(滴灌带) Lateral ( Drip line ) 15.滴灌支管Manifold 16.尾部开关(电磁阀) Zone Valve(Electrical valve) 17.冲洗阀 Flush Valve 18肥料罐 Fertilizer Tank 19.肥量调节阀 Fertilizer Regulator 20.施肥器 Fertilizer Injector 21.干管Main Line ;;;2、膜下滴灌系统设备Equipment of Drip Irrigation System under Mulch Film ;2.1滴灌管（带） Drip line (tape);柱状滴头Columnar drip tape ;2.2输配水管道 Pipes for water transportation ;PE支管、辅管 PE Submain Line pipe and Feeder Line pipe ;2.3??部控制枢纽 Head Control ;过滤设备 Filtration device;Centrifugal Filter;网式过滤器 Screen Filter;离心网式过滤器组合 United Centrifugal Filter and Screen Filter;砂石过滤器 Sand Filter;工作原理 Operating Principle ;叠片式过滤器 Disc Filter;施肥罐：Fertilizer Tank;3.膜下滴灌系统的规划设计 Project Planning and Design of Drip Irrigation System under Mulch Film ;3.1.2规划的内容  Contents of project;3.1.3资料的收集  Data collection;3.2滴灌系统的布置  Layout of drip irrigation system;式中： in the formula： A——可灌面积，hm2； irrigation area，hm2； Q——可供流量，m3/h； flow rate，m3/h ； Ia——设计供水强度，mm/d； designed water supply intensity， Ia =Ea-P0 Ea——设计耗水强度，mm/d；designed water consume intensity，mm/d； P0——有效降雨量，mm/d； efficiency of rainfall，mm/d； t——水源每日供水时数，h/d； hour of water supply everyday，h/d； η——灌溉水利用系数。 coefficient of irrigation water. ; 水源有调蓄能力且调蓄容积已定时，可用下式确定滴灌面积 Use the following formula to decide irrigation area, as water source is adjustable and adjusting cubage is fixed：  ;3.2.2常见的几种管网布置方式Some familiar pipe networks layouts ;T 形布置 “T” disposal ;梳齿形布置 Comb form disposal ; 3.3系统设计参数的确定  Ascertainment of system design parameter ;4、滴头设计工作水头应取所选滴头的额定工作水头，或由滴头压力与流量关系曲线确定。 Choose nominal working water head as work