Selection of Deep Well Submersible Pump

Deep well submersible pump is a type of submersible pump used to extract water from a well. Compared with the deep well pump (long axis shaft pump), it has the advantages of compact structure, simple operation, reliable operation and high efficiency. It is widely used in various departments of national economy production. Well with submersible pump selection how to do it?
1 Deep well submersible pump model
There are many types and specifications of submersible electric well pumps. To facilitate the production and use of submersible electric pumps, the state has formulated a unified model, with phonetic alphabet and numbers that its structural features, requirements and performance. Well with submersible pump with QJ said, such as 300Qj125 a 110/5, the meaning of each component is:
①300 said wells with submersible pump for the minimum diameter is 300cm;
②QJ said wells with submersible pump;
③125 indicates that the rated flow rate of submersible pump is 125m ^ 3 / h;
④ 110 that the rated pump head is 110m;
⑤ 5 that the pump is a series of five, that is equipped with five impellers. The different types of wells with submersible pump basic operating parameters are listed in a table, on the formation of a water pump selection table.
2 Basic information collection
2.1 Water use.
Including the design of water flow, water flow over time with the law, water pressure and water quality requirements.
2.2 Information on wells.
Including: the type of well, that is, the well is shallow or deep well; the diameter and verticality of the wellbore; the depth of the well, the depth of the static water level and the depth of the well; the maximum water inflow of the well, the maximum water level of the well, the water depth and the depth The water content of silt, water temperature and pH.
2.3 wells with submersible pump supply.
Understand the local wells with submersible pump product supply and use of the analysis of different manufacturers of product performance, use requirements, price and supply reliability.
2.4 Electricity supply situation.
Understand the original low-voltage power grid capacity at the building, line layout, voltage drop and the existing electricity load, etc., to analyze the new pump station can be used for power supply and reliability of power supply.
3 wells with submersible pump selection
According to production requirements, the characteristics of wells and pump product supply and other information, you can use the selection table to select well with submersible pump model.
3.1 primary pump type.
According to the diameter of the well, according to the diameter of the pump must be consistent with the principle of the minimum pump diameter, check the QJ pump selection table to determine the pump model. Such as 250mm of the caliper, the choice of ZooQJ pump. The general requirements of the caliper should be more than the minimum pump diameter of 50 to 10Omm, in order to facilitate the installation and maintenance of the pump.
3.2 Select the pump type according to the flow rate.
The rated flow of the selected submersible pump shall be slightly greater than (or equal to) the required flow rate and shall not be greater than the maximum water discharge of the well. According to this request check QJ pump selection table in the corresponding content,
Choose a pump that meets the desired flow rate. When the production requirements of the flow is greater than the maximum water flow wells, the wells should be the largest water flow selected pump.
The selection of submersible pump for well is an important work in the construction of well pump station and involves more contents. Selection is reasonable, not only affects the pump station water supply reliability, but also affect the investment and operating costs of pumping stations, but also affect the safety of pumping stations, it must be treated with caution. Selection of the same water wells to select several options, through technical and economic comparison to select the optimal program.