In recent years, the social holding capacity of agricultural water pumps in China has increased significantly, especially small-scale agricultural water pumps represented by submersible pumps and self-priming pumps, which are favored by users because of their low price and easy operation. However, due to the large number of manufacturers of small water pumps, the technical strength is not uniform, resulting in a disparity in product quality. Coupled with factors such as improper operation and use, many users have created new troubles and even suffered a lot of economic losses. According to statistics, at present, half of the annual production of agricultural pumps in China is used to replace scrapped products. Therefore, how to choose a durable, satisfactory pump and how to extend the life of the pump has become a matter of great concern to users.

First, choose a standardized water pump

1. What is a standardized water pump?

The standardized water pump is the latest model of water pump developed and implemented by the state according to the requirements of ISO. Its main features are small size, light weight, excellent performance, easy operation, long life and low energy consumption. It represents the latest trend in the current pump industry.

2, how to choose a pump

When the user chooses the pump, it is best to go to the sales point approved by the agricultural machinery department, and be sure to recognize the manufacturer. It is recommended to give priority to the purchase of water-filled submersible pumps, and to see the brand and product quality certificate. Never buy a "three no" (ie no manufacturer, no production date, no production license) products, otherwise there will be problems, users will be helpless.

3. What brand of pump is good?

As a user, due to the limitations of professional knowledge, it is difficult to determine, the best way is to consult the experts in the pump. If there is no one to consult, it is a wise choice to consult some old pump users, especially those who are close to their own conditions and buy these products that are trustworthy, reliable and mature. At the same time, the single-phase or three-phase pump should be used according to the local power supply.

Second, choose the pump that meets the requirements of the lift

1, pump lift selection

The so-called head refers to the required lift, not the height of the lift, which is especially important for the selection of pumps. The pump lift is about 1.15 to 1.20 times the lift height. If the vertical height of a water source to the water is 20 meters, the required lift is about 23 to 24 meters. When selecting the pump, the head on the pump nameplate should be close to the required head. In this case, the pump is the most efficient and the use is more economical. However, it is not necessarily required to be absolutely equal. As long as the general deviation does not exceed 20%, the pump can work in a more energy-saving situation.

2. How big is the nameplate lift?

Choosing a pump with a lift on the nameplate that is much smaller than the required lift will often not satisfy the user's wishes. Even if the water can be pumped, the amount of water will be pitifully small, and it will even become a useless pump. . Is it better to buy a pump with the highest lift? Actually it is not. If the pump with high lift is used for low lift, the flow will be too large, causing the motor to be overloaded. If the motor temperature rises for a long time, the winding insulation will gradually age and even burn the motor.

Third, choose the right flow pump

The flow rate of the pump, that is, the amount of water, should not be chosen too large, otherwise it will increase the cost of purchasing the pump. Specific analysis should be carried out on specific issues. For example, if the user uses a self-priming water pump for their own draught, the flow rate should be selected as small as possible; for example, the user can use a submersible pump for irrigation to select a larger flow.

Fourth, several problems should be paid attention to during use

Properly mastering the use method is an important factor in prolonging the life of the pump and reducing economic losses.

1. For submersible pumps

Before starting, you should do some necessary checks: whether the rotation of the pump shaft is normal, whether there is any jamming; whether the position of the impeller is normal; whether the cable and cable plug are broken, scratched or broken. Pay attention to the change of voltage during operation, generally within ±5% of the rated voltage. In addition, the position of the water pump in the water is very important. It should be selected in a place with abundant water, no silt and good water quality. It should be suspended vertically in the water. It should not be placed horizontally to avoid falling into the mud or blocking the water pump inlet by suspended solids. This will result in a sharp drop in water output or even a drop in water.

2. For self-priming pumps

It should be placed in a well ventilated place as much as possible to facilitate rapid heat dissipation and reduce motor temperature. Otherwise, it will be easy to burn the motor when it is running for a long time. For example, when a farmer uses a self-priming pump, the motor is overheated and the coil is burned out because the plastic film covering the motor is not removed. In addition, before starting, be sure to check the water storage in the pump body, otherwise, not only affect the self-priming performance, but also easy to burn the shaft seal components. Under normal conditions, the water should be discharged within 3 to 5 minutes after the pump is started. Otherwise, it should be stopped immediately.

3, pump repair

When the pump fails, do not disassemble it yourself. Because of the dismantling of oneself, one does not know where the fault is located, causing blind dismantling; second, there is no special tool and often damages the intact parts. The best way is to go to an experienced, large-scale repair point to repair, and replace the "overage" parts and some wearing parts in time. Under normal circumstances, the pump should be repaired once every six months to prevent the "ill" work.

4, non-use period storage

During the non-use period, the pump should be removed from the water source in time and the water in the pump should be drained, especially during the cold winter months. Then place it in a dry place. Conditional users can also apply butter to the key parts of the pump and add lubricant to the bearing to prevent corrosion of the parts. In addition, the non-use period of the pump is not as long as possible. If it is not used for a long time, it will not only easily rust parts, but also reduce the service life of the pump.

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