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E-mail: info@hktpump.com
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Submersible slurry pump
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Product Introduction and Description
The ZJQ and NSQ submersible slurry pumps/sand suction pumps are hydraulic machines where the motor and pump operate coaxially submerged in the medium. The pump's flow components are made of high-strength wear-resistant alloys, wear-resistant cast iron, and cast steel, etc. The material of the flow components is determined based on the liquid discharged by the customer's operation. This pump has a large flow passage and is suitable for conveying mud, ore pulp, coal pulp, sand and gravel, etc., containing relatively large solid particles. It can also be used for river dredging, sewage, slurry feed, etc., for suction, spraying, and it can also be used in municipal, chemical dyeing, medicine, shipbuilding, food, and other industries, as well as for suction of high-concentration viscous liquids, sewage, paste-like substances, etc. It is an important piece of equipment that cannot be replaced by submersible sewage pumps.
This series of products are designed and manufactured by absorbing advanced technologies from home and abroad. In addition to the main impeller, the pump has an additional stirring impeller at the bottom, which can spray the accumulated sludge into turbulence, allowing the pump to achieve high-concentration conveying without auxiliary devices. The unique sealing device can effectively balance the pressure inside and outside the oil chamber, maximizing the reliability of the mechanical seal. The motor adopts various protection measures such as overheating protection and water ingress detection protection, and replaces the usability, reliability, and service life of various vertical pumps. It can operate safely and reliably for a long time under harsh working conditions.
Suitable for extracting construction sand, fine sand, sludge, tailings pulp, ore sand, iron sand ore, rivers, lakes, reservoirs, ports, and other dredging projects. It can also be used for clearing sediment in sedimentation tanks of steel mills, power plants, iron ore plants, and oil fields, as well as in sewage treatment plants.
Our company is engaged in the research and development and production of hydraulic sand dredging and dredging equipment. We also provide experience in various vertical and horizontal dredging sand pumps for different construction environments. We have developed submersible slurry pumps and sand suction pumps. We always adhere to the people-oriented approach, technological innovation, continuously improve internal management, improve product quality, provide excellent and unique after-sales service, and maintain a good corporate reputation to continuously meet customer requirements. Achieving your success with our expertise—is our eternal pursuit!
Structural Description
1. The entire machine is a dry pump type, the motor uses an oil chamber sealing method, and an internal mechanical seal effectively prevents high-pressure water and impurities from entering the motor cavity.
2. In addition to the main impeller, there is a stirring impeller, which can stir the sludge deposited at the bottom of the water into turbulence before extraction.
3. The impellers and other flow components are made of high-hardness high-strength wear-resistant alloy (C), cast iron (M), and cast steel (G), with strong sand-discharge capacity and the ability to discharge larger solid particles.
4. The motor is submerged underwater, not limited by the suction head, with high sludge suction efficiency and more thorough dredging.
5. The overall equipment is simplified, and no auxiliary stirring or spraying devices are required, making operation simple and reducing the overall investment cost.
6. The stirring impeller is directly close to the sedimentation surface, and the concentration is controlled through the submergence depth. In cases with high specific gravity of the medium, auxiliary devices can be added to increase the medium concentration.
Conditions of Use
1. The power supply is a 50HZ/60HZ/380V/415V/660V/1140V three-phase AC power supply, and the capacity of the distribution transformer is 2-3 times the rated capacity of the motor.
2. The medium temperature should not exceed 60°C, xSQ(R) type should not exceed 140°C, and does not contain flammable or explosive gases.
3. Maximum weight concentration of solid particles in the medium: ash slag is 45%, and mine slag is 60%.
4. For pumps with an internal self-circulating cooling system, the motor part should not be exposed to the liquid surface by more than 1/2.
5. Unit submergence depth: not more than 40 meters, the minimum submergence depth should be based on submerging the motor.
6. The working position of the unit in the medium is vertical, suspended and positioned from above.
7. Under normal circumstances, the pump must be used within the rated head range to ensure that the motor is not overloaded. If it needs to be used in the full head range, please specify it when ordering, so that the manufacturer can produce it accordingly.
Advantages
(1) Compared with general horizontal pumps, submersible slurry pumps/sand suction pumps have the following advantages:
1. Compact structure and small footprint. Because it works submerged in the liquid, it can be directly installed in the sewage sand-discharge pool, eliminating the need to build a special pump room to install the pump and motor, saving a significant amount of land and construction costs.
2. Convenient installation and maintenance, free installation.
3. Long continuous running time. Because the pump and motor are coaxial and the shaft is short, the weight of the rotating parts is light, and the load (radial) on the bearings is relatively small, resulting in a much longer lifespan than ordinary pumps.
4. No cavitation damage or priming problems. The latter point is particularly convenient for operators. Because of the above advantages, it has been increasingly valued and its range of use has expanded from the simple conveyance of high-concentration sand to the conveyance of various domestic sewage, industrial wastewater, construction site drainage, liquid feed, etc. It plays a very important role in municipal engineering, industry, hospitals, construction, hotels, water conservancy construction, and various other industries.
(2) Sealing Technology
A so-called auxiliary impeller fluid dynamic seal refers to an auxiliary impeller installed behind the pump cover that rotates in the opposite direction to the main impeller. When the pump is operating, the auxiliary impeller rotates with the main pump shaft, and the liquid in the auxiliary impeller rotates as well. The rotating liquid generates an outward centrifugal force. This centrifugal force, on the one hand, pushes against the liquid flowing towards the mechanical seal, reducing the pressure at the mechanical seal. On the other hand, it prevents solid particles in the medium from entering the mechanical seal's friction area, reducing wear and tear on the mechanical seal's rubbing blocks, and extending their service life. In addition to its sealing function, the auxiliary impeller also reduces axial force. In this type of pump, the axial force is mainly composed of the pressure difference force of the liquid acting on the impeller and the weight of the entire rotating part. The directions of these two forces are the same, and the resultant force is the sum of the two forces. It can be seen that, under the same performance parameters, the axial force of this type of pump is greater than that of a general horizontal pump, and the balancing difficulty is greater than that of a vertical pump. Therefore, in this type of pump, the bearings are prone to damage, which is also largely related to the axial force. If an auxiliary impeller is installed, the direction of the pressure difference force on the auxiliary impeller is opposite to the resultant force of the above two forces, which can offset part of the axial force and extend the service life of the bearings. However, there is a disadvantage to using an auxiliary impeller sealing system: it consumes some energy on the auxiliary impeller, generally around 3%. As long as the medium is reasonably designed, this loss can be minimized.
Model Significance
Product Structure Description
ZJQ and NSQ submersible slurry pumps/sand pumps consist of a motor and a pump, separated by an oil isolation chamber and mechanical seal components. They are electromechanical integrated products, with the motor and pump sharing the same shaft (rotor), resulting in a short overall pump length and compact structure. Equipped with multiple protective devices, ensuring safe and reliable pump operation.
Uses a Y-series national standard motor with F-class insulation, ensuring safe and reliable operation.
Uses a double-series tandem seal with a new alloy material, providing reliable sealing, wear resistance, and a long service life.
The flow passage components use high-chromium slurry pump material, which is wear-resistant and exhibits superior performance and flow characteristics. It boasts a service life 2-10 times longer than similar domestic pumps.
1. Signal Line 11. Oil-Water Sensor 2. Motor Wiring 12. Oil Chamber 3. Junction Box 13. Mechanical Seal 4. Motor Cover 14. Guard Plate 5. Bearing 15. Discharge Pipe 6. Upper Shaft Seat 16. Bracket 7. Motor Housing 17. Pump Body 8. Stator 18. Impeller 9. Shaft (Rotor) 19. Base Filter 10. Bearing 20. Cutter Performance Parameters Table
Product Model Speed
(r/min)Flow Rate
(m³/h)Head
(m)Power
(KW)Diameter
(mm)40ZJQ/NSQ 8-12-2.2 1450 8 12 2.2 40 10-21-5.5 10 21 5.5 40 15-12-3 15 12 3 40 18-19-5.5 18 19 5.5 40 23-10-3 23 10 3 40 25-17-5.5 25 17 5.5 40 50NsQ 12-6-3 1450 12 6 3 50 20-20-4 20 20 4 50 25-15-4 25 15 4 50 25-30-7.5 25 30 7.5 50 30-16-5.5 30 16 5.5 50 35-6-4 35 6 4 50 45-14-5.5 45 14 5.5 50 65ZJQ/NSQ 25-15-4 1450 25 15 4 65 47-34-11 47 34 11 65 56-27-11 56 27 11 65 71-25-11 71 25 11 65 80ZJQ/NSQ 10-15-5.5 1450 10 15 5.5 80 30-30-7.5 30 30 7.5 80 45-15-5.5 45 15 5.5 80 70-20-7.5 70 20 7.5 80 Product Model Speed
(r/min)Flow Rate
(m³/h)Head
(m)Power
(KW)Diameter
(mm)80ZJQ/NSQ 70-35-15 1450 70 35 15 80 80-15-7.5 80 15 7.5 80 80-20-11 80 20 11 80 80-45-22 80 45 22 80 100-20-11 100 20 11 80 100-30-15 100 30 15 80 130-19-22 130 19 22 80 100NsQ 80-25-15 1450 80 25 15 100 100-12-7.5 100 12 7.5 100 100-20-15 100 20 15 100 100-30-18.5 100 30 18.5 100 120-18-15 120 18 15 100 120-35-22 120 35 22 100 150-25-22 150 25 22 100 150-38-30 150 38 30 100 160-80-90 160 80 90 100 180-22-22 180 22 22 100 200-35-37 200 35 37 100 150 NS 120-16-15 1450 120 16 15 150 150-22-18.5 150 22 18.5 150 150-35-22 150 35 22 150 Product Model Speed
(r/min)Flow rate
(m³/h)Head
(m)Power
(KW)Diameter
(mm)150 NSQ 180-25-22 1450 180 25 22 150 200-22-22 200 22 22 150 200-35-37 200 35 37 150 200-80-110 200 80 110 150 250-16-22 250 16 22 150 250-22-30 250 22 30 150 250-40-45 250 40 45 150 260-35-45 260 35 45 150 260-60-110 260 60 110 150 280-33-45 280 33 45 150 300-22-30 300 22 30 150 300-30-37 300 30 37 150 300-30-45 300 30 45 150 350-25-37 350 25 37 150 400-30-55 400 30 55 150 450-25-75 450 25 75 150 200 NsQ 300-25-37 1450 300 25 37 200 450-25-55 450 25 55 200 500-35-90 500 35 90 200 Features
1. Adopts advanced technology, strong sewage sludge discharge capacity, no blockage, can effectively pass solid particles with a diameter of φ30~φ60 mm.
2. The tearing mechanism can tear and cut fibrous substances, and then discharge them smoothly, without the need to add a filter screen to the pump.
3. Reasonable design, small matching motor power, significant energy saving effect.
4. Using the latest materials of mechanical seal, the pump can run safely and continuously.
5. Compact structure, easy to move, easy to install, can reduce engineering costs, no need to build a pump room.
6. It can be used in the full head range while ensuring that the motor is not overloaded.Installation System Instructions
1. Automatic Coupling Device System
Suitable for long-term fixed use occasions, it has the advantages of quick installation, convenient inspection and maintenance. This system uses a special base, fixed at the bottom of the sewage pit, connected with the outlet pipe, the matching support block is installed at the pool top, and the guide rod is used to connect the two, the water pump is connected with the specific bracket, down to the base along the guide rod, automatically coupled and sealed, and automatically detached when lifted.
2. Mobile Installation System
It is supported by a bracket, and it can work after connecting the outlet hose. This method is mainly used for emergency or repair construction needs.
Pump Usage and Precautions
1. Before using the pump, carefully check whether the cable is damaged, whether the fasteners are loose or fall off, and whether the pump is deformed or damaged during transportation, storage and installation.
2. Use a 500V megohmmeter to measure the insulation resistance between the electric pump motor and the ground, which should not be less than 2 megohms, otherwise the stator winding of the motor should be dried. The drying temperature should not exceed 120℃.
3. This series of pumps has two installation methods: fixed and mobile. When using fixed automatic installation, the chain should be inserted into the two hanging ring screws or lifting plates (deviating from the pump outlet, and the connecting line should be parallel to the pump outlet) to lift the electric pump up and down. Slide down along the guide rail evenly and slowly until it is automatically coupled. When using the mobile installation method, first put on the hose, lift the electric pump up and down with the chain, and pay attention not to use the cable as a rope, so as to avoid danger.
4. After the pump is turned on, the direction of rotation is counterclockwise when viewed from the inlet. If the electric pump reverses, just swap the positions of any two wires in the cable.
5. The ground wire of the electric pump casing must be strictly connected according to the relevant regulations. In order to ensure the personal safety during use, when the electric pump is running, it is strictly forbidden to install personnel to go down into the water or move nearby, in case of electric shock accident due to leakage.
6. The electric pump must be equipped with a fully automatic pump control cabinet under normal circumstances. Do not directly connect to the power grid or use a knife switch to connect the power supply to ensure the normal operation of the electric pump.
7. The electric pump should not be operated under low head for a long time (the general use head should not be lower than 60% of the rated head), and it is best to control it within the recommended use head range to prevent the electric pump from being overloaded and burning out the motor.
8. Pumps without self-circulating cooling devices are strictly prohibited from being exposed to water for a long time to prevent the electric pump from overheating and damage.
Maintenance
1. The electric pump should be managed and used by a designated person, and regularly check whether the insulation resistance between the electric pump winding and the casing is normal.
2. After each use, especially after use in thicker and more viscous slurry, the electric pump should be put into clear water for several minutes to prevent the pump from leaving sediment and ensure the cleanliness of the electric pump.
3. If the electric pump is not used for a long time, it should be taken out of the water and should not be soaked in water for a long time, so as to reduce the chance of moisture in the motor stator winding and increase the service life of the electric pump.
4. Under normal conditions, the pump should be refilled or replaced with oil in the oil chamber (10-30# oil) after every 300-500 hours of use, so that the mechanical seal maintains a good lubrication state and improves the service life of the mechanical seal.
5. After the electric pump is disassembled and repaired, the casing assembly must be checked by a 0.2MPa airtight test to ensure the reliable sealing of the motor.
6. The sealing ring between the impeller and the pump body has a sealing function. If the seal is damaged, it will directly affect the pump's performance. It should be replaced if necessary.
Common Malfunctions and Troubleshooting Methods
Malfunction Cause Troubleshooting Methods Insufficient flow
or no water output1. Motor reversal
2. Impeller flow path or pipe blockage
3. The installation head is too high, or the head of the selected pump is significantly lower than the actual requirement
4. Severe impeller wear
5. The liquid level is too low, causing the pump to suck in air
6. Check valve installed in reverse1. Correct the motor direction
2. Remove debris from the impeller or pipe. It is best to install a screen around the pump (but do not install a filter screen at the pump inlet).
3. Try to lower the installation head (e.g., change to a larger diameter pipe or smooth pipe, reduce the number of elbows, or increase the radius of curvature of the elbows) or use a pump with a higher head.
4. Replace the impeller
5. Adjust the float switch position so that the minimum liquid level meets the requirements of the installation dimensions.
6. Correct the check valve direction.Cannot start 1. Phase missing
2. Impeller jammed
3. Winding connection or cable break
4. Stator winding burnt out
5. Control device malfunction
6. Power voltage too low1. Check the circuit and eliminate the phase missing problem
2. Remove debris. It is best to install a screen around the pump (but do not install a filter screen at the pump inlet).
3. Check with an ohmmeter and repair
4. Repair, replace the winding or stator
5. Check the control cabinet, repair or replace electrical components
6. Address the power voltage problemStator burnt out 1. In the absence of protective control devices; phase missing operation or starting under phase missing conditions; impeller jammed or detached; excessive media concentration; clogged cooling system
2. Motor water ingress due to seal damage
3. Motor water ingress due to loose fasteners
4. Motor running above water surface for extended periodsBefore use after repairing the motor:
1. Configure protective control devices and: Check the circuit, eliminate phase missing faults; remove dirt, tighten impeller fastening screws and stainless steel spring washers; dilute the medium with water; flush and unclog the cooling system
2. Replace the mechanical seal or "O"-ring
3. Tighten all fasteners
4. Ensure the minimum liquid level is not lower than that specified in the installation drawingExcessive current 1. The density or viscosity of the pumped liquid is high
2. The head of the selected pump greatly exceeds the actual need, or the operating conditions change, and the installation head is significantly reduced, causing the pump to operate beyond the recommended flow rate
3. Bearing damage
4. Debris trapped between the impeller and the pump body (e.g., at the mouth ring)
5. Power voltage too low1. Change the density or viscosity of the pumped liquid
2. Close the outlet valve to reduce the flow rate, or trim the impeller, or replace a pump with a lower head
3. Replace the bearings
4. Remove debris
5. Address the power voltage problemLarge vibration and noise 1. The head of the selected pump greatly exceeds the actual need, or the operating conditions change, and the installation head is significantly reduced, causing the pump to operate beyond the recommended flow rate
2. The liquid level is too low, causing the pump to suck in air
3. Improper pipe layout, such as a valve installed close to the pump outlet and the valve is slightly closed. A bend pipe is installed close to the pump outlet. The diameter of the discharge pipe close to the pump outlet suddenly shrinks. The diameter of the suction pipe of the installed pump is smaller than the inlet diameter of the suction bend pipe
4. Bearings lack grease or are damaged
5. Debris is stuck between the impeller and the pump body (accompanied by increased current)1. Close the outlet valve to reduce the flow rate, or trim the impeller, or replace a pump with a lower head
2. Adjust the float switch position so that the minimum liquid level meets the requirements of the installation dimensions.
3. Find out the specific problems in the piping setting and solve them accordingly.
4. Add grease to the bearings or replace the bearings.
5. Remove debris
Product System
The company's industrial pump production base focuses on meeting the needs of various industrial scenarios. We are committed to creating products such as slurry pumps, desulfurization pumps, dredging pumps, submersible pumps, and chemical pumps. From the demand for high wear-resistant slurry pumps in large-scale mining, to the dependence on high-efficiency desulfurization pumps in power plant desulfurization, to the strict requirements for high corrosion-resistant chemical pumps in fine chemical processes, we can provide high-performance products that are suitable for all. These pumps are widely used in industries such as mining, power plant desulfurization, river sand mining, metallurgy and steel, chemical industry, etc.
The valve production base covers various categories such as ball valves, gate valves, butterfly valves, etc. With excellent quality and reliable performance, it is widely used in the fields of oil and gas transmission pipelines, urban water supply and drainage systems, etc., to ensure the safe and stable operation of various fluid transmission systems.
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E-Mail: info@hktpump.com
Tel.：+86-13323110006
WhatsApp：+86-13323110006
Add.：Yigu Information Industry Park, Xinzhaidian, Zhao County, Shijiazhuang, Hebei Province, China