Engineering problems, practical problems, interesting problems of water pumps

When choosing a water pump, many factors should be taken into account. Here are some small experiences that I hope will help you. The flow rate of the pump, that is, the amount of water output, should not be selected too much, otherwise it will increase the cost of purchasing the pump.

It should be selected according to demand, such as the self-priming water pump used by the user's home, and the flow rate should be as small as possible; For example, the submersible pump used by the user for irrigation can appropriately choose the one with a larger flow rate. 1) Pump should be purchased according to local conditions. There are 3 types of commonly used agricultural water pumps, namely centrifugal pumps, axial flow pumps and mixed-flow pumps.

The centrifugal pump has a high head, but the water output is not large, which is suitable for mountainous areas and well irrigation areas; The axial flow pump has a large water output, but the head is not too high, which is suitable for use in plain areas; The water output and head of the mixed-flow pump are between centrifugal pumps and axial flow pumps, and are suitable for use in plain and hilly areas. The user should be based on the terrain of the place....

In practical application, the water pipe is connected to the top of the water tower, mainly to prevent water backflow after pumping.

In fact, the water pipe is connected to the bottom of the water tower and the pumping speed of the water tower is fast, precisely because the water pressure at the nozzle only increases with the increase of water, the resistance is relatively small, and there is more water on the water at the same time.

The weight of the water in the water tower: r 2*h = kg

The water displacement distance is 6 meters.

w=fs=1570*

There are many micro pumps on the market: micro liquid pumps, small pumps, pumping pumps, self-priming pumps, etc., which are dazzling. What criteria should be used to select a model? World Pump & Valve Network offers you the following selection principles.

1. The working medium at room temperature (0-50) is simply pumped or solution, and is not used for water and air, but it is required to have self-priming ability, and has requirements for flow and output pressure.

Note: The working medium of pumping is water, non-oily, not a liquid such as strong corrosion bond and ear erosion (can not contain solid particles, etc.), and must have a self-priming function, you can choose the following pumps:

1. The flow requirement is large (about 4 20 liters minutes), the pressure requirement is not high (about 1 3 kg), mainly used for water circulation, water sampling, lifting, etc., requiring low noise, long life, high self-priming balance and large suction stroke, etc., then BSP, CSP and other series can be selected;

2. The flow requirement is not high (about 1 5 liters per minute), but the pressure is large (about 2 11 kg), which is mainly used for spraying, pressurization, car washing, etc., which do not need to work under high pressure or large load for a long time, you can choose ASP, HSP and other series;

3. It is used for pumping and spraying tea tables, etc., which requires the volume to be as small as possible, the flow rate is small, and the noise is small (about liters and minutes), and ASP and other series are optional.