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Company Profile
Sichuan Mighty Pump Connection Technology Co., Ltd. is a professional company mainly engaged in the sales of pumps and motors, with advanced testing equipment and strong after-sales force. Professional sales and service team. The product is marketed in over 30 provinces, municipalities, and autonomous regions across the country and has been recognized by peers.
Sichuan Mighty Pump Connection Technology Co., Ltd. collaborates with nationally renowned manufacturers to sell water pumps and various motors. Main business: sediment pumps, mud pumps, sewage pumps, centrifugal pumps, deep well pumps, motors and various accessories, technical consulting and services, etc. The product involves sewage discharge, tunnel waterlogging discharge, domestic water supply, etc. Highly praised and trusted by a large number of users, maintaining a leading position in the fierce market competition.
Sichuan Mighty Pump Connection Technology Co., Ltd. adheres to the principle of "quality first, customer first" and is dedicated to providing high-quality products and services to our customers.
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Product Introduction
Working principle of submersible pump Product overview
The QJ type submersible electric pump for wells is a water lifting equipment that is directly connected to a motor and a water pump and works underwater. It is suitable for extracting groundwater from deep wells and can also be used for water lifting projects such as rivers, reservoirs, and canals; Mainly used for irrigation of farmland and water supply for humans and animals in high-altitude mountainous areas, it can also be used for drainage in cities, workers, railways, mines, and construction sites.
Product Features
1. Integrated motor and water pump, submerged operation, safe and reliable.
2. There are no special requirements for well pipes and water lifting pipes. (That is, steel pipe wells, ash pipe wells, soil wells, etc. can all be used; under pressure permission, steel pipes, rubber hoses, plastic pipes, etc. can all be used as lifting pipes)
3. Easy to install, use, and maintain, with a small footprint and no need to build a pump room.
4. Simple structure and material saving.
5. This pump cannot be overturned, tilted, or used with ultra-low head.
Note: The suitability and proper management of the conditions for the use of submersible pumps are directly related to their service life.
| model |
frame(mm) |
caliber(mm) |
Flow(m³/h) |
head(m) |
power(kw) |
| 250QJ125-32/2-18.5KW |
250 |
125 |
125 |
32 |
18.5 |
| 250QJ125-48/3-25KW |
250 |
125 |
125 |
48 |
25 |
| 250QJ125-64/4-37KW |
250 |
125 |
125 |
64 |
37 |
| 250QJ125-80/5-45KW |
250 |
125 |
125 |
80 |
45 |
| 250QJ125-96/6-55KW |
250 |
125 |
125 |
96 |
55 |
| 250QJ125-112/7-63KW |
250 |
125 |
125 |
112 |
63 |
| 250QJ125-128/8-75KW |
250 |
125 |
125 |
128 |
75 |
| 250QJ125-144/9-90KW |
250 |
125 |
125 |
144 |
90 |
| 250QJ125-160/10-90KW |
250 |
125 |
125 |
160 |
90 |
| 250QJ125-176/11-110KW |
250 |
125 |
125 |
176 |
110 |
| 250QJ140-30/2-18.5KW |
250 |
125 |
140 |
30 |
18.5 |
| 250QJ140-45/3-30KW |
250 |
125 |
140 |
45 |
30 |
| 250QJ140-60/4-37KW |
250 |
125 |
140 |
60 |
37 |
| 250QJ140-75/5-45KW |
250 |
125 |
140 |
75 |
45 |
| 250QJ140-90/6-55KW |
250 |
125 |
140 |
90 |
55 |
| 250QJ140-105/7-63KW |
250 |
125 |
140 |
105 |
63 |
| 250QJ140-120/8-75KW |
250 |
125 |
140 |
120 |
75 |
| 250QJ140-135/9-90KW |
250 |
125 |
140 |
135 |
90 |
| 250QJ140-150/10-90KW |
250 |
125 |
140 |
150 |
90 |
| 250QJ140-165/11-110KW |
250 |
125 |
140 |
165 |
110 |
| 250QJ140-180/12-110KW |
250 |
125 |
140 |
180 |
110 |
FAQ-Common problems with submersible pumps
1.What is the composition of a submersible pump?
A submersible pump is mainly composed of two parts: an electric motor and a pump head.
The motor part of the submersible pump includes components such as the motor seat, upper end cover, stator winding, rotor (directly connected to the pump shaft), lower end cover, bearings, etc. The motor part is the core of the submersible pump, responsible for energy conversion and transmission.
The pump head is composed of a connecting frame (mechanical seal cover), pump body, impeller, pump seat, outlet bend, etc. This section is mainly responsible for the extraction and transportation of liquids.
The components of a submersible pump also include stator, rotor, air gap, bearings, seals, wiring chambers and cables, impeller, volute and guide vanes, and other parts. These components work together to ensure the normal operation and high efficiency of the submersible pump.
The design of submersible pumps is compact and mature, and after years of use and testing, the effect is very good. Its structure is mainly divided into two parts: the pump body part and the motor part. The pump body includes the guide housing, impeller, pump shaft, inlet bracket, check valve, shaft sleeve, mouth ring, and fastening bolts. The motor part includes the motor rotor and the motor stator, where the stator is composed of silicon steel sheets and winding coils. The motor shaft, shaft sleeve, bearing shell, motor bracket, upper and lower guides, motor lower thrust, motor pressure regulating bag, etc. are also important components.
2.How to maintain a submersible pump?
The maintenance of submersible pumps is crucial for ensuring their long-term stable operation and extending their service life. Here are some key maintenance measures:
Timely replacement of sealing box: If a large amount of water is found leaking into the interior of the electric pump, the sealing box should be replaced in a timely manner, and the insulation resistance value of the motor winding should be measured at the same time. If the insulation resistance value is lower than 0.5, drying treatment is required. When replacing the sealing box, attention should be paid to the integrity of the outer diameter and O-ring in the shaft hole, otherwise a large amount of water will leak into the interior of the submersible pump and damage the motor winding.
Regularly refuel and change oil: The submersible pump must change the oil in the sealed chamber every 3200 hours of operation, and the oil inside the motor must be changed once a day. It is necessary to regularly replace the upper and lower end covers, the skeleton oil seals in the bearing chamber, and the lithium based lubricating oil of the water filled submersible pump to ensure good lubrication.
Regularly measure the insulation resistance value: Use a 650V or 3200V resistance meter to measure the insulation resistance value of the stator winding of the electric pump to the casing. Only when it is above 1 (not less than 0.5) can it be used. Otherwise, winding maintenance or drying treatment should be carried out to ensure safety during use.
Reasonable storage: When not in use for a long time, submersible pumps should not be immersed in water for a long time and should be stored in a dry and ventilated room. The submersible pump should be cleaned first to remove sludge and debris before being placed in a ventilated and dry room. When storing the rubber cable of the submersible pump, it is necessary to avoid exposure to sunlight, otherwise it is prone to aging and surface cracking.
Timely rust prevention treatment on the surface of the submersible pump: After one year of use, the submersible pump should be painted and rust proofed according to the corrosion condition on the surface of the submersible pump.
Air pressure test: After maintenance of the electric pump or replacement of the mechanical seal, a 0.2Mpa air pressure test should be conducted to check whether there is any air leakage at the fitting surface of the O-ring and the second cover of the mechanical seal of each component. If there is any air leakage, the leaking component must be reassembled or replaced.
3.What is the principle of a submersible pump?
The working principle of a submersible pump is to use an electric motor to drive the impeller to rotate, so that the liquid is pressurized under the action of the impeller, thereby achieving the function of extracting liquid.
A submersible pump is a type of pump that uses submersible form to extract liquids. It consists of a submersible pump body, an electric motor, a coupling, and installed bearings. When the electric motor starts, the impeller begins to rotate, and water is sucked into the pump and passes through the special large design of the pump body, causing the water to be subjected to the generated pressure, and then output through the outlet pipe. The entire process is achieved by transmitting electricity to rotate the mechanical components of the pump, in order to pump water from the lower layer to the upper layer. The design principle of submersible pumps is "no entanglement, no blockage". Some models are also equipped with tearing mechanisms or cutting devices, which can tear and discharge long fibers, strips, and other materials in the water.
What is the principle of a submersible pump?
The working principle of a submersible pump is to use an electric motor to drive the impeller to rotate, so that the liquid is pressurized under the action of the impeller, thereby achieving the function of extracting liquid.
A submersible pump is a type of pump that uses submersible form to extract liquids. It consists of a submersible pump body, an electric motor, a coupling, and installed bearings. When the electric motor starts, the impeller begins to rotate, and water is sucked into the pump and passes through the special large design of the pump body, causing the water to be subjected to the generated pressure, and then output through the outlet pipe. The entire process is achieved by transmitting electricity to rotate the mechanical components of the pump, in order to pump water from the lower layer to the upper layer. The design principle of submersible pumps is "no entanglement, no blockage". Some models are also equipped with tearing mechanisms or cutting devices, which can tear and discharge long fibers, strips, and other materials in the water.
4.How to repair a submersible pump?
Check power connection: Ensure that the power connection is secure and the cable is not damaged or broken. If there is any damage, it should be repaired or replaced in a timely manner to ensure stable power supply.
Check for motor malfunction: If the submersible pump cannot start or runs unstably, the motor should be checked for any faults. Inspect visually and by touch to check for any damage or abnormalities inside the motor. If necessary, replace or repair the motor.
Check the cable: The condition of the cable is crucial for the normal operation of the submersible pump. The insulation layer, shielding layer, and conductor part of the cable should be checked for integrity. If damage or aging is found, it should be replaced or repaired in a timely manner to avoid motor overload or overheating.
Check the seals: After prolonged use, the seals of the submersible pump may wear or age, leading to a decrease in sealing performance. Seals should be replaced regularly to ensure good sealing performance.
Check the impeller: The impeller is one of the important components of a submersible pump, and its wear may affect the flow rate and head of the submersible pump. The impeller should be checked for wear, deformation, or loss, and replaced or repaired as needed.
Check bearings: The bearings of the submersible pump may wear or be damaged after prolonged use, leading to abnormal operation. The lubrication condition of the bearings should be checked and replaced or repaired as needed.
Adjusting the water level of the water source, cleaning the inlet pipeline, checking the sealing, and discharging air are also important steps in the maintenance process to ensure the normal operation of the submersible pump.
When repairing a submersible pump, the following points should also be noted:
The pre use inspection includes checking whether there are cracks in the casing of the submersible pump, whether the sealing of the cable joints is loose, and the insulation resistance of the submersible pump.
It is best not to have joints in the cable of the submersible pump. If there are joints, they should be wrapped properly, and the entire cable should be free of damage or breakage.
Before starting, calibrate the positive and negative poles of the power supply to prevent the water pump from reversing and not producing water.
5.What are the advantages of submersible pumps?
The advantages of submersible pumps mainly include compact structure, easy installation, stable operation, low noise, energy conservation and environmental protection, high efficiency, strong adaptability, and easy maintenance.
The design of submersible pumps integrates the pump body and motor, eliminating the need for installation in the pump room and greatly simplifying the installation process. At the same time, due to the fact that submersible pumps can work directly underwater without the need for complex inlet and drainage systems, installation costs and difficulties are further reduced. This compact design not only saves space, but also reduces maintenance costs.
During operation, the vibration and noise of the submersible pump are effectively suppressed, making the operation more stable and reducing the possibility of malfunctions, providing users with a more comfortable working environment. In addition, the submersible pump adopts advanced motor technology and hydraulic design, which enables the pump to maintain high efficiency during operation, reduce energy transfer losses, and improve energy utilization efficiency.
Submersible pumps can adapt to various complex working environments, such as high temperature, high humidity, and highly corrosive media. In order to meet the needs of different occasions, it has been widely used in agricultural irrigation, urban water supply, industrial drainage and other fields.
The maintenance of submersible pumps is also relatively convenient, adopting modular design to make pump maintenance and replacement more convenient. In addition, submersible pumps can monitor their operating status and fault information in real time during operation, making it convenient for users to discover and handle problems in a timely manner.
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