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E-mail: info@hktpump.com
Phone: +86-13323110006
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Submersible Slurry Pump
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Product Introduction and Description
The ZJQ and NSQ submersible slurry pumps and sand suction pumps are hydraulic machines where the motor and pump are coaxial and 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. The 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 removal, manure, slurry feed, etc., for suction, spraying, and can also be used in municipal, chemical dyeing, pharmaceutical, shipbuilding, food industries, etc., as well as for suction of high-viscosity liquids, dirty liquids, pastes, etc. It is an important equipment that cannot be replaced by submersible sewage pumps.
This series of products is designed and manufactured using advanced technologies from home and abroad. In addition to the main impeller, the pump also has a set of stirring impellers at the bottom, which can spray the deposited sludge into turbulence, enabling the pump to achieve high-concentration conveying without auxiliary devices. The unique sealing device effectively balances 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, replacing the usability, reliability, and service life of various vertical pumps. It can operate safely for a long time under harsh working conditions.
Suitable for extracting construction sand, fine sand, sludge, tailings pulp, mineral sand, iron sand ore, rivers, lakes, reservoirs, ports, and other dredging projects. It can also be used for removing sediment from sedimentation tanks in steel mills, power plants, iron ore plants, and oil fields, as well as for treating wastewater plant sediments, etc.
The company is engaged in the research and development and production of hydraulic sand dredging and dredging equipment, and has experience in providing suitable vertical and horizontal dredging sand pumps for different construction environments. It has developed submersible slurry pumps and sand suction pumps, and always adheres to people-oriented, technological innovation, continuously improving internal management, improving product quality, providing excellent and unique after-sales service, and good corporate reputation to continuously meet customer needs. Our professionalism makes your business successful—this is our eternal pursuit!
Structural Description
1. The whole machine is a dry pump type, and the motor uses an oil chamber sealing method with an internal mechanical seal to effectively prevent high-pressure water and impurities from entering the motor cavity.
2. In addition to the main impeller, there is also a stirring sub-impeller, which can stir the sludge deposited at the bottom of the water into turbulence before extracting it.
3. The impellers and stirring impellers and other flow components are made of high-hardness, high-strength wear-resistant alloys (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 slag suction efficiency, and more thorough dredging.
5. The overall equipment is simplified, no auxiliary stirring devices or spraying devices are required, making operation simple and reducing the total investment of the unit.
6. The stirring impeller is directly close to the sediment surface, and the concentration is controlled by the submergence depth. In the case of a large medium specific gravity, the medium concentration can be increased by adding auxiliary devices.
Operating Conditions
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℃, xSQ(R) type not exceeding 140℃, and no flammable or explosive gases are allowed.
3. Maximum weight concentration of solid particles in the medium: ash slag is 45%, and mine slag is 60%.
4. In pumps with an internal self-circulating cooling system, the motor part is exposed to the liquid surface no more than 1/2.
5. Unit submergence depth: not more than 40 meters, the minimum submergence depth is based on the motor being submerged.
6. The working position of the unit in the medium is vertical, and the upper part is suspended for positioning.
7. Generally, the pump must be used within the operating 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 manufacture it accordingly.
Advantages
(A) Compared with ordinary horizontal pumps, submersible slurry pumps and sand suction pumps have the following advantages:
1. Compact structure and small footprint. Since it works submerged in liquid, it can be directly installed in the sewage sand discharge pool without the need to build a special pump room to install the pump and motor, saving a lot of land and construction costs.
2. Convenient installation and maintenance, and free installation.
3. Long continuous running time. Because the pump and motor are coaxial with a short shaft and light rotating parts, the load (radial) on the bearings is relatively small, and the service life is much longer than that of ordinary pumps.
4. There are no problems such as cavitation damage and priming. The latter point, in particular, greatly facilitates the operators. Due to the above advantages, it has been increasingly valued and its application range has expanded from simply conveying high-concentration sand to conveying various domestic sewage, industrial wastewater, construction site drainage, liquid feed, etc. It plays a very important role in various industries such as municipal engineering, industry, hospitals, construction, hotels, and water conservancy construction.
(B) Sealing Technology
The so-called auxiliary impeller fluid dynamic seal refers to the installation of an auxiliary impeller 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 shaft of the pump, and the liquid in the auxiliary impeller also rotates. The rotating liquid generates an outward centrifugal force, which on the one hand presses 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 friction, reducing the wear of the mechanical seal blocks, and extending the service life. In addition to its sealing function, the auxiliary impeller can also reduce axial force. In this type of pump, the axial force is mainly composed of the pressure difference force acting on the impeller by the liquid and the gravity 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, the bearings in this type of pump 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, so it can offset part of the axial force and extend the life of the bearing. However, there is a drawback to using an auxiliary impeller sealing system, that is, it consumes a certain amount of energy on the auxiliary impeller, generally about 3%. As long as the design is reasonable, this loss can be minimized.
Model Significance
Product Structure Description
ZJQ and NSQ submersible slurry pumps and sand pumps are composed of a motor and a pump, which are separated by an oil isolation chamber and a mechanical seal assembly. They are electromechanical integrated products. The motor and pump share the same shaft (rotor), making the entire water pump short and compact. Equipped with various protective devices, the pump operates safely and reliably.
Uses a Y-series national standard motor with F-class insulation, ensuring safe and reliable operation.
Uses a double-channel series seal, selecting a new type of alloy material, which features reliable sealing, wear resistance, and a long service life.
The flow components use high-chromium slurry pumps, with wear-resistant materials, good performance, and excellent flow performance. Its service life is 2 to 10 times that of domestic pumps of the same type.
1. Signal Line 11. Oil-Water Probe 2. Motor Wiring 12. Oil Chamber 3. Junction Box 13. Mechanical Seal 4. Motor Cover 14. Guard Plate 5. Bearing 15. Outlet Pipe 6. Upper Shaft Seat 16. Bracket 7. Motor Shell 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 materials, 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 material mechanical seal, the pump can run safely and continuously.
5. Compact structure, easy to move, easy to install, can reduce project cost, no need to build a pump room.
6. 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, with the advantages of quick installation, convenient inspection and maintenance. This system uses a special base, fixed at the bottom of the sewage pit, connected to the outlet pipe, and the matching support block is installed at the top of the pool, and the guide rod connects the two, the water pump is connected to the specific bracket, down to the base along the guide rod, automatically coupled and sealed, and automatically falls off when lifted.
2. Mobile installation system
It is supported by a bracket and can work after connecting the outlet hose. This method is mainly used for emergency or maintenance 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 there is any deformation or damage to the pump during transportation, storage, and installation.
2. Use a 500V megohmmeter to measure the insulation resistance between the electric pump motor and the ground. The value 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. The installation of this series of pumps has two types: fixed and mobile. When using the fixed automatic installation, the chain should be put into the two lifting 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. Uniformly and slowly slide along the guide rail until automatic coupling is in place. When using mobile installation, first put on the hose, use the chain to lift the electric pump up and down, pay attention not to use the cable as a rope, to avoid accidents.
4. The direction of rotation after the pump is turned on is counterclockwise from the inlet. If the electric pump is reversed, simply change the connection position of any two wires in the cable.
5. The grounding wire of the electric pump casing must be strictly connected according to relevant regulations. To ensure personal safety during use, it is strictly forbidden to install personnel to go down into the water or move around near the electric pump when the electric pump is running, to prevent electric shock accidents caused by electric pump leakage.
6. Electric pumps must be equipped with a fully automatic water pump control cabinet under normal circumstances. Do not directly connect to the power grid or use a knife switch to turn on the power to ensure that the electric pump runs normally.
7. Do not run the electric pump in a low head state for a long time (the general head should not be lower than 60% of the rated head), it is best to control it within the recommended head range, to prevent the electric pump from being overloaded and burning the motor.
8. Pumps without self-circulation cooling devices are strictly prohibited from running for a long time with the whole body exposed to the water surface, to prevent the electric pump from overheating and damaging.
Maintenance
1. The electric pump should be managed and used by a dedicated person, and the insulation resistance between the electric pump winding and the casing should be checked regularly.
2. After each use, especially after use with thicker and more viscous slurry, the electric pump should be put into clean water and operated for several minutes to prevent sediment from remaining in the pump 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 immersed in the water for a long time to reduce the chance of the motor stator winding getting damp and increase the service life of the electric pump.
4. Under normal conditions, after every 300-500 hours of use of the pump, the oil in the oil chamber should be added or replaced (10-30# engine oil) to keep the mechanical seal in good lubrication condition and improve the service life of the mechanical seal.
5. After dismantling and repairing the electric pump, the casing assembly must be checked with a 0.2MPa air pressure test to ensure reliable motor sealing.
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 performance of the pump. It should be replaced if necessary.
Common Malfunctions and Troubleshooting Methods
Malfunction Cause Troubleshooting Method Insufficient flow
or no water outflow1. Motor reversal
2. Impeller flow passage or pipeline blockage
3. System head is too high, or the head of the selected pump is significantly lower than the actual requirement
4. Severe impeller wear
5. Liquid level 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 pipeline. It is best to install a filter screen around the pump (but do not install a filter mesh at the pump inlet).
3. Try to reduce the system head (such as changing to a larger diameter pipe or smooth pipe, reducing the number of elbows, or increasing the radius of curvature of the elbows) or using a pump with a higher head.
4. Replace the impeller
5. Adjust the float switch position so that the minimum liquid level meets the installation requirements.
6. Correct the check valve direction.Cannot start 1. Phase missing
2. Impeller jammed
3. Winding connection or cable breakage
4. Stator winding burned out
5. Control appliance malfunction
6. Power voltage too low1. Check the wiring and eliminate the phase missing problem
2. Remove debris. It is best to install a filter screen around the pump (but do not install a filter mesh at the pump inlet).
3. Repair after checking with an ohmmeter
4. Repair, replace the winding or stator
5. Check the control cabinet, repair or replace electrical parts
6. Address the power voltage problemStator burned out 1. Operating without protective control appliances; starting or operating in a phase-missing state; impeller jammed or detached; excessively high medium 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 using the motor after repair, you must:
1. Configure protective control appliances and: check the wiring, eliminate phase-missing faults; remove dirt, tighten impeller fastening screws and stainless steel spring washers; dilute the medium with water; flush and clear the cooling system
2. Replace the mechanical seal or "O"-ring
3. Tighten all fasteners
4. Ensure that the minimum liquid level does not fall below that specified in the installation drawingExcessive current 1. Higher density or viscosity of the liquid being pumped
2. The selected pump's head significantly exceeds the actual requirement, or operating conditions change, and the system head significantly decreases, 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 liquid being pumped
2. Close the outlet valve to reduce the flow rate, or trim the impeller, or replace a lower head pump
3. Replace the bearings
4. Remove debris
5. Address the power voltage problemLarge vibration and noise 1. The selected pump's head significantly exceeds the actual requirement, or operating conditions change, and the system head significantly decreases, causing the pump to operate beyond the recommended flow rate
2. Liquid level too low, causing the pump to suck in air
3. Improper pipeline configuration, 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 decreases. The diameter of the suction pipe of the installed pump is smaller than the inlet diameter of the suction bend pipe.
4. Bearing lacks grease or is 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 lower head pump
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 pipeline settings and solve them accordingly.
4. Lubricate 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