Gravel slurry pump, also known as a large particle dredge pump, is specifically engineered to handle the most challenging abrasive slurry. Unlike common pumps, gravel slurry pumps excel at handling slurry that contains solids too large to be efficiently pumped by conventional means. These pumps are well-suited for various applications, including mining, metal melting, dredging, and more.

In mining operations, gravel slurry pumps play a vital role in transporting slurry containing coarse particles. They are designed to withstand the harsh conditions and abrasive nature of mining slurry, ensuring the continuous extraction of valuable minerals. By efficiently handling the high concentration of solids, these pumps enable smooth operations, enhance productivity, and minimize downtime.

So, how to disassemble the gravel sand pump correctly when it encounters a failure and needs to replace wearing parts? What are the steps for reassembly? What should you pay attention to when running a gravel sand pump? Next, this article will describe the above issues and solve the common doubts of gravel sand pump users.

Common Sense of Wear Resistant Slurry Pump Disassembly and Use
Common Sense of Sand Pump Machine Disassembly and Use
Common Sense of Gravel Pump Disassembly and Use

1. Common Sense of Gravel Slurry Pump Disassembly and Assembly

1.1 Partial disassembly and assembly of the pump head

The partial disassembly and clearance adjustment of the gravel slurry pump head should be strictly implemented in accordance with the sequence of the assembly drawing. The impeller, sheath, rear guard plate, and sealing box are all equipped with lifting tools for disassembly and assembly (the lifting tools need to be ordered separately).

1.2 Assembly of shaft seal.

The disassembly and assembly of the packing shaft seal should follow the assembly diagram. In order to ensure the sealing effect of the packing shaft seal, the opening of the packing shape should be cut as shown in the figure as much as possible. When installing stuffing box, the opening of the adjacent packing should be staggered by 108 degrees.

2. Main Points for Maintenance 

  • Bearing water pressure and water volume must meet the rules, adjust the packing tightness level at any time, do not cause shaft seal leakage, and replace the shaft sleeve in time.
  • When changing the bearing, make sure that there is no dust in the bearing assembly and the smooth oil is clean. When the large particle slurry pump is running, the bearing temperature should not exceed 60-65℃, and the highest should not exceed 75℃.
  • It is necessary to ensure the coaxial of the motor and the large particle slurry pump, and ensure that the elastic pad in the coupling is intact and correct, and should be replaced in time after damage.
  • Ensure that the wear resistant dredge pump components and piping system are correct, strong and reliable.
  • Pay attention to the wear and tear of wearing parts in daily use, repairing or replacing them in time. In the process of repairing or replacing the wearing parts, ensure that the assembly is correct and the gap adjustment is reasonable to prevent tight friction.
  • The suction piping system of the slurry suction pump must be in a state of no air leakage. At the same time, pay attention to whether the suction port is blocked during operation. The medium to be handled by the wear resistant dredge pump is mostly with solid particles, so the grid placed in the pumping pool should meet the particle requirements that the Gravel slurry pump allows to pass through, and reduce the possibility of larger particles and long-fiber materials entering the gravel dredge pump body.
Common Sense of Slurry Pump Disassembly and Use
Common Sense of Sand Pumping Equipment Disassembly and Use
Common Sense of Dredge Pump Disassembly and Use

3. Pump selection and installation

Gravel pump should be selected according to the liquid to be transported, and checking the required performance, analyzing the suction and discharge conditions, whether it is intermittent or continuous operation, etc. Wear resistant dredge pump should usually be operated at or close to the pressure and flow conditions designed by the manufacturer. The following re-checks should be carried out when the gravel slurry pump is installed.

The size, position and elevation of the foundation should meet the design requirements, the anchor bolts must be properly fixed in the concrete foundation, and the machine should not be parts missing, damaged or rusted.

According to the characteristics of the medium conveyed by the dredge pump, the materials of the main parts, shaft seals and gaskets should be checked if necessary.

The leveling and aligning work of the gravel slurry pump should conform to the rules of the equipment technical documents. If there are no rules, it should conform to the rules of the current national standard “General Standards for Construction and Acceptance of Mechanical Equipment Installations”.

The installation of all pipelines and fittings connected with the gravel pump body, smooth oil pipeline cleaning should comply with the rules of relevant national standards.

4. Gravel slurry pump operation

4.1 The testing and running should meet the following requirements

  • The steering of the driver should be the same as that of the gravel slurry pump.
  • Find out the steering of pipeline pumps and coaxial pumps.
  • There should be no looseness in each fixed connection part, and the specification and quantity of smoothing agent added to each smooth part should conform to the rules of the equipment technical documents.
  • There should be no looseness in each fixed connection part, the specification and quantity of smoothing agent added to each smooth part should conform to the rules of the equipment technical documents.
  • The parts with pre-smoothing request should be pre-smoothed according to the rules.
  • All indicating instruments should be flexible, accurate and reliable.
  • The turning gear should be sensitive and free of abnormal phenomena.
  • The high temperature pump should stop the preheating of the pump body before trial operation, the temperature should rise on average, and the hourly temperature rise should not be greater than 500℃; the temperature difference between the pump body and the pipeline with the working medium inlet should not be greater than 4090.
  • Set up connection installation to eliminate the influence of temperature rise, and set up bypass connection installation to provide cooling water source.

4.2 Pay attention to the following points when operating the pump.

Common Sense of Sand Suction Pump Disassembly and Use
Common Sense of Sand Pumping Machine Disassembly and Use
Common Sense of Sand Pump Disassembly and Use
  • Stop running without water, don’t adjust the suction to reduce the displacement, stop running under too low flow.
  • Monitor the operation process, completely prevent the stuffing box from leaking, use new stuffing when changing the stuffing box.
  • Ensure that the mechanical seal has sufficient flushing water flow, and the water-cooled bearing prevents excessive water flow.
  • Do not use too much lubricant.
  • Check according to the referral cycle.
  • Establish operating records, including operating hours, adjustment and replacement of fillers, addition of smoothing agents and other maintenance measures and time. The gravel slurry pump suction and discharge pressure, flow rate, input power, temperature of washing liquid and bearing, and vibration conditions should be measured and recorded regularly.

Conclusion

In conclusion, the disassembly and usage of gravel slurry pumps should be conducted with precision and care, and we advice you to follow the steps and rules which mentioned on above. the proper disassembly and usage of a gravel slurry pump are crucial for its efficient operation and longevity. Gravel slurry pumps are specifically designed to handle abrasive slurries containing large particles, making them indispensable in various industries such as mining, metal melting, and dredging. By following the recommended disassembly and assembly procedures, users can ensure the smooth functioning of their pumps and minimize downtime.

When disassembling a gravel slurry pump, it is essential to adhere to the assembly drawing sequence and use the appropriate lifting tools. The assembly of the shaft seal should also be carried out meticulously to ensure optimal sealing. Regular maintenance is vital to keep the pump in good condition, including checking bearing water pressure and volume, adjusting packing tightness, and replacing wearing parts when necessary. Attention should also be given to the correct installation of the pump, ensuring proper alignment and reliable piping systems.

In the realm of gravel slurry pumps, Tai’an OCEAN Pump stands out as a leading manufacturer and exporter. With a team of experienced experts and a state-of-the-art factory, Tai’an OCEAN Pump has been providing top-notch sand pumping solutions to over 60 countries. Their gravel slurry pumps are engineered to withstand the harshest conditions and deliver exceptional performance. The company’s commitment to quality and innovation has earned them a reputable position in the industry.

Choosing Tai’an OCEAN Pump brings several advantages. Their pumps are designed to handle high concentrations of solids efficiently, ensuring smooth operations and enhanced productivity. The company’s focus on product development and manufacturing processes guarantees reliable and durable pumps. Moreover, Tai’an OCEAN Pump offers comprehensive technical support and excellent customer service, assisting users in selecting the right gravel slurry pump and providing guidance throughout the pump’s lifespan.