排灌时如一台水泵扬程不够用,可将两台或多台水泵串联起来使用;如所需流量大,输水较远,为了节约管材,可把两台或多台水泵出水管并为一条供水。一、水泵串联运行水泵串联运行,有机房内串联和机房外串联等形式(见图1、2)。前一种方式管理方便,缺点是ⅡI号泵及出水管所受压力太大,如串联的台数多,则最后一台泵及出水管有损坏的危险。后一种方式管理不方便,但可在Ⅰ号泵出水管上加设三通管,浇灌输水沿途的 Irrigation pump, such as a pump head enough, two or more pumps can be used in series; such as the required flow, water far, in order to save pipe, you can put two or more pumps out of the water pipe and a water supply . First, the pump series operation Pump series operation, the organic room in series and room outside the series (Figure 1, 2). The former way is easy to manage. The disadvantage is that the pressure of ⅡI pump and outlet pipe is too high. If there are many units in series, the last pump and outlet pipe are in danger of being damaged. The latter way of management is not convenient, but in the pump No. Ⅰ plus Tee pipe, water along the way