一、如何选择离心泵离心泵一般用于中、高扬程(30米以上)的灌区使用。选离心泵时,只要知道灌区面积与地形扬程,可利用《离心泵选型图》(图1)查选。举例如下:已知灌溉面积为1000亩,实际(地形)扬程为50米,试选一台离心泵。解:对于北方地区,如小麦、玉米、棉花,所需的灌溉流量为:Q_需=(灌溉面积(亩))/(2～3)(米~3/时)对于南方地区,水稻等水田作物,Q 需按上式再 First, how to choose Centrifugal pump Centrifugal pump is generally used for medium and high lift (30 meters above) irrigation use. Select centrifugal pump, as long as you know the irrigation area and topography, you can use the “centrifugal pump selection map” (Figure 1) check. Here’s an example: It is known that the irrigated area is 1000 mu and the actual (terrain) head is 50 meters. Try a centrifugal pump. Solution: The irrigation flow rates required for northern areas such as wheat, corn and cotton are as follows: Q_ required = (irrigated area (mu)) / (2-3) (m ~ 3 / h) For the southern region, Paddy crop, Q according to the above formula