How to classify and select water-saving irrigation pumps in farmland?

Agriculture can not do without water, so can not do without pumps, different areas have different choices, then how to classify and select water-saving irrigation pumps in farmland?

There are three main types of agricultural pumps to choose from: mixed flow pumps, centrifugal pumps, and submersible pumps.

Agricultural mixed flow pump the flow rate and head of mixed flow pump are between centrifugal pump and axial flow pump. The utility model has the advantages of small size, light weight, high efficiency, wide high efficiency area, simple structure, convenient use and easy maintenance. The conveying medium is clear water or similar to clear water, which is suitable for farmland drainage and irrigation and industrial water supply and drainage.

Mixed flow pump belongs to a kind of pump between centrifugal pump and axial flow pump, which has large water output but low lift, so it is suitable for areas with rich surface water resources in the south. The common model is HW mixed flow pump, which can be powered by motor or diesel engine.

Various forms of mixed-flow pumps (such as vertical, mechanical seals, special materials, etc.) can also be developed according to the requirements of users, and the speed of the pump can be changed within a certain range according to the specific requirements.

Agricultural centrifugal pump

The centrifugal pump works by using the centrifugal movement of water caused by the rotation of the impeller. There are many models to choose from, and the range of flow and head is also wide, so it is the most widely used water pump in agriculture. The low lift centrifugal pump can be selected in the plain area, the moderate lift can be selected in the hilly area, and the multi-stage centrifugal pump with higher lift can be used in the high elevation area. Users should choose and purchase according to the local land condition, water source and water lifting height. The common models are: is type centrifugal pump, ISW horizontal centrifugal pump, B type centrifugal pump, BA type centrifugal pump, SSH type double suction centrifugal pump, DG type multi-stage centrifugal pump.

Agricultural submersible pump

Submersible pump is suitable for pumping water from deep wells: mainly used for farmland irrigation and plateau mountain irrigation, mainly used in plain areas such as North China where surface water is scarce. The common model is: QJ well submersible pump.

1, submersible pump motor, pump integrated, diving into the water operation, safe and reliable.

2. There are no special requirements for well pipes and lifting pipes (that is, steel pipe wells, ash pipe wells, soil wells, etc.) can be used as risers under pressure permission, steel pipes, rubber pipes, plastic pipes, etc.

3. Installation, use and maintenance are convenient and simple, covering a small area, and there is no need to build a pump room.

4. Simple structure and saving raw materials.

5. Whether the conditions for the use of the submersible pump are suitable or not and the proper management are directly related to the service life.

After determining the type of agricultural water pump, customers should consider its economic performance, and pay special attention to the selection of pump head, flow and matching power. It must be noted that there is a difference between the head (total head) indicated on the pump sign and the actual lift (actual head) when in use, because there is a certain resistance loss when the water flows through the vicinity of the aqueduct and pipeline. Therefore, the actual head is generally 10%-20% lower than the total head, and the water output is also reduced accordingly. Therefore, in actual use, it can only be estimated according to 80% of the head and flow rate of the sign, and the matching power of the pump can be selected according to the power indicated on the sign. in order to make the pump start quickly and safely, the power of the power machine can also be slightly greater than the power needed by the pump, which is generally about 10% higher; if you already have power, when you buy a pump, you can choose a matching pump according to the power of the engine.