【正文】 棉花膜下滴灌工程 棉花膜下滴灌工程 （機械采棉一管兩行） 2 目 錄 （一）棉花膜下滴灌工程設計說明 .................................................. 1 1. 基本資料 ............................................................................................................... 1 2. 系統(tǒng)規(guī)劃布置及設計參數(shù) ................................................................................... 1 系統(tǒng)工程規(guī)劃布置 .......................................................................................... 1 設計參數(shù) .......................................................................................................... 3 3. 毛管的水力設計 .................................................................................................. 6 毛管允許水頭偏差 ......................................................................................... 6 毛管極限孔數(shù)和極限長度 ............................................................................. 6 4. 管網(wǎng)布置與系統(tǒng)工作制度的確定 ...................................................................... 6 管網(wǎng)布置 ......................................................................................................... 6 系統(tǒng)工作制度設計 ......................................................................................... 9 輪灌組數(shù)的校核 ........................................................................................... 10 5. 管網(wǎng)水力計算和支、干管管徑的確定 ............................................................ 10 毛管水力計算 ............................................................................................... 10 穩(wěn)流三通的選擇與進口最低壓力的確定 ................................................... 11 只管管徑的確定 與水頭損失計算 ............................................................... 11 干管管徑確定與水頭損失計算 ................................................................... 11 6. 首部樞紐設計 .................................................................................................... 13 水泵與動力選型 ........................................................................................... 13 過濾器 ........................................................................................................... 13 施肥罐 ........................................................................................................... 13 控制量測設施與保護裝置 ........................................................................... 13 7. 系統(tǒng)運行負荷 .................................................................................................... 13 水泵工作點校核 ........................................................................................... 13 節(jié)點壓力均衡驗算 ....................................................................................... 13 灌水小區(qū)流量與水頭偏差復核 ................................................................... 14 水錘壓力驗算及防護 ................................................................................... 14 8. 系統(tǒng)土建設計 .................................................................................................... 14 9. 材料設備用量 .................................................................................................... 14 （二）棉花膜下滴灌工程技術設計圖 ............................................16 （三）棉花膜下滴灌工程淺評 .....................................................