The agricultural small submersible electric pump is a main water lifting device for rural households to solve production, domestic water and farmland irrigation. However, due to the large number of manufacturers of submersible electric pumps, there is a large gap in technical strength, which results in great disparities in product quality. Therefore, if you want to choose a reliable, cheap water pump, you must start from the following aspects:
1, the manufacturer's choice. To choose a submersible pump, we must first recognize the water pump manufacturer. We recommend that you consider purchasing water-filled submersible pumps as a priority. When selecting a pump, you must first look at the brand and product certification, and you must not purchase “three non-productsâ€, that is, no manufacturer. , no production date, no production license. Otherwise, the user will be at a loss.
2, single-phase or three-phase pump selection. Should be based on the local power conditions to determine the use of single-phase or three-phase pump, where there is generally a three-phase power supply to choose a three-phase pump. This is because the three-phase pump is smaller in size, lighter in weight and lighter in vibration than the single-phase and three-phase pumps of the same specification, so it is more economical to choose a three-phase pump.
3, the determination of the pump parameters. The main point of choosing a submersible pump is to determine the parameters such as the flow and lift of the pump. The selection of the pump flow rate should be adapted to the amount of water coming from the water source, the amount of water used, and the economic conditions of the family, and should be specifically dealt with on specific issues. The best choice for the user's head needs to be close to the lift of the pump brand, and the economy can be used to achieve the highest efficiency. However, it is not required to be absolutely equal. Generally, a deviation of less than 20% can work under more energy-saving conditions. If the pump head selected is too small, the low lift pump is used for high lift operation, ie “small horse-drawn cartâ€. Even if it can pump water, the water volume will be very small; the pump head is too high, and the high lift pump is used for low lift. Work, that is, "big horse-drawn car", there will be excessive flow during operation, motor overload, if the long-term operation, the motor temperature increases, the winding insulation will gradually aging, or even burned the motor.
4, the quality of the pump inspection. Submersible pumps have water-filled, oil-filled, and shielded motors, and are generally most widely used for water-filled applications. Before the pump is used, the two water hole bolts must be completely unscrewed, one water injection (no sand water), and the other one should be discharged. After the water injection, it needs to wait for about 15 minutes. After the air in the motor chamber is fully discharged, add water. Until the water is filled, then tighten the two water injection bolts. Keep the motor in a sealed state. After the motor is filled with water, the windings work in water and the insulation of the motor can be measured. The megohmmeter must be used to measure the insulation resistance, and the universal meter cannot be used. Because the range of the universal meter is limited, the insulation resistance between the winding and the earth is measured. Not sure. After the insulation is qualified, test the pump. Where conditions permit, after filling the motor with water, tighten the water injection bolts to allow the pump to be energized and test run in the pool, but not for long periods of time. If there is no condition, idle operation can be performed on the well but the time must not exceed 3 seconds.
5, the choice of place to buy. It should be noted that the point of sale or specialty store approved by the Agricultural Machinery Department purchases and asks for formal invoices, otherwise there will be problems that the user will not be able to solve.
1, the manufacturer's choice. To choose a submersible pump, we must first recognize the water pump manufacturer. We recommend that you consider purchasing water-filled submersible pumps as a priority. When selecting a pump, you must first look at the brand and product certification, and you must not purchase “three non-productsâ€, that is, no manufacturer. , no production date, no production license. Otherwise, the user will be at a loss.
2, single-phase or three-phase pump selection. Should be based on the local power conditions to determine the use of single-phase or three-phase pump, where there is generally a three-phase power supply to choose a three-phase pump. This is because the three-phase pump is smaller in size, lighter in weight and lighter in vibration than the single-phase and three-phase pumps of the same specification, so it is more economical to choose a three-phase pump.
3, the determination of the pump parameters. The main point of choosing a submersible pump is to determine the parameters such as the flow and lift of the pump. The selection of the pump flow rate should be adapted to the amount of water coming from the water source, the amount of water used, and the economic conditions of the family, and should be specifically dealt with on specific issues. The best choice for the user's head needs to be close to the lift of the pump brand, and the economy can be used to achieve the highest efficiency. However, it is not required to be absolutely equal. Generally, a deviation of less than 20% can work under more energy-saving conditions. If the pump head selected is too small, the low lift pump is used for high lift operation, ie “small horse-drawn cartâ€. Even if it can pump water, the water volume will be very small; the pump head is too high, and the high lift pump is used for low lift. Work, that is, "big horse-drawn car", there will be excessive flow during operation, motor overload, if the long-term operation, the motor temperature increases, the winding insulation will gradually aging, or even burned the motor.
4, the quality of the pump inspection. Submersible pumps have water-filled, oil-filled, and shielded motors, and are generally most widely used for water-filled applications. Before the pump is used, the two water hole bolts must be completely unscrewed, one water injection (no sand water), and the other one should be discharged. After the water injection, it needs to wait for about 15 minutes. After the air in the motor chamber is fully discharged, add water. Until the water is filled, then tighten the two water injection bolts. Keep the motor in a sealed state. After the motor is filled with water, the windings work in water and the insulation of the motor can be measured. The megohmmeter must be used to measure the insulation resistance, and the universal meter cannot be used. Because the range of the universal meter is limited, the insulation resistance between the winding and the earth is measured. Not sure. After the insulation is qualified, test the pump. Where conditions permit, after filling the motor with water, tighten the water injection bolts to allow the pump to be energized and test run in the pool, but not for long periods of time. If there is no condition, idle operation can be performed on the well but the time must not exceed 3 seconds.
5, the choice of place to buy. It should be noted that the point of sale or specialty store approved by the Agricultural Machinery Department purchases and asks for formal invoices, otherwise there will be problems that the user will not be able to solve.
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