Dredging mud pump abrasion experiment system and using method

Abstract

The invention discloses a dredging dredge pump abrasion experiment system and a using method, and relates to the technical field of dredging equipment testing, the dredging dredge pump abrasion experiment system comprises a dredge pump testing unit, a pipeline conveying system, a data acquisition system, a filtering system and a material adding system, the dredge pump testing unit comprises a dredge pump, a dredge pump outlet and a dredge pump inlet; the pipeline conveying system comprises an inlet pipeline, an outlet pipeline, a conveying pipeline and a material box; the data acquisition system comprises a plurality of measurement sensing devices, a data acquisition instrument and an upper computer; the filtering system comprises a multi-stage filter screen, a flow guide pipeline, a water tank, a vertical pump and a clear water backflow pipeline; the material feeding system comprises a sand storage bin, a quantitative discharging device and a conveying belt. The experiment platform is constructed to simulate the actual working environment of the dredge pump, the relation between the vibration signal of the dredge pump and the performance of the dredge pump is established, the abrasion condition of the dredge pump in the silt slurry conveying process is accurately tested, and the basis is provided for maintenance and optimization of the dredge pump.

Description

Technical Field

[0001] The present invention relates to the technical field of dredging equipment testing, and particularly to a dredging mud pump wear experiment system and a using method thereof. Background Art

[0002] In a series of water conservancy projects such as water conservancy dredging, river and lake regulation, and mine water pool cleaning, the mud pump, as a key equipment, undertakes the heavy responsibility of sucking and transporting a mixed liquid containing a large amount of sediment, gravel, and other solid particles. As the core component of the mechanical dredging system, the mud pump effectively lifts complex media such as sand, soil, and coral reefs in the riverbed, lake, or mine to the ground or transports them to a designated position by using the principle of fluid dynamics or mechanical drive mechanism. However, due to the complexity of the riverbed geological structure and the diversity of dredging media, such as the uneven hardness of the riverbed bottom sediment and the wide distribution of particle sizes, the mud pump has long faced the problem of accelerated wear of components such as impellers and shaft seals caused by highly abrasive media. Such wear not only reduces the operation efficiency of the mud pump but may also cause equipment failures and even safety accidents.

[0003] At present, there is a lack of systematic and effective testing means for monitoring and evaluating the wear of dredging mud pumps, making it difficult to accurately grasp the wear law of mud pumps. Moreover, existing methods mostly rely on manual experience to judge the degree of equipment loss and the replacement time, which has problems such as strong subjectivity and low accuracy, easily leading to problems such as increased safety risks due to lagged replacement or waste of resources due to premature replacement. Although existing technologies have tried to improve the monitoring ability, for example, the intelligent mud pump modular monitoring system proposed in Patent CN 118705192 A can predict the health of shaft seals, cavitation, vibration, and impeller wear status through an analysis and evaluation model, but its technical solution does not disclose the specific implementation platform and real-time testing mechanism, resulting in the evaluation results being difficult to accurately reflect the dynamic working conditions of the mud pump and unable to provide reliable data support for equipment maintenance decisions. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a dredging mud pump wear experiment system and a using method thereof. By constructing a test platform to simulate the actual working environment of the mud pump, testing the changes in vibration signals and mud pump performance during the working process of the mud pump, establishing the relationship between the vibration signal during the operation of the mud pump and the mud pump performance, and accurately testing the wear condition of the mud pump.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A dredging mud pump wear experiment system and a using method thereof, including a mud pump test unit, a pipeline transportation system, a data acquisition system, a filtration system, and a material feeding system, wherein:

[0007] The mud pump test unit includes a mud pump, a mud pump outlet, and a mud pump inlet;

[0008] The pipeline transportation system includes an inlet pipeline, an outlet pipeline, a transportation pipeline, and a material box. The inlet pipeline is connected to the inlet of the mud pump, the outlet pipeline is connected to the outlet of the mud pump, and the transportation pipeline connects the inlet pipeline, the outlet pipeline, and the material box;

[0009] The data acquisition system includes several measurement and sensing devices, a data acquisition instrument, and a host computer. Several of the measurement and sensing devices are installed on the mud pump test unit and the pipeline transportation system, and the measurement and sensing devices are connected to the host computer through the data acquisition instrument;

[0010] The filtration system includes a multi-stage filter screen, a diversion pipeline, a water tank, a vertical pump, and a clean water return pipeline. The inlet of the water tank is connected to the material box through the diversion pipeline and the multi-stage filter screen. A sedimentation area is provided inside the water tank, and the outlet of the water tank is communicated with the material box through the clean water return channel and the vertical pump;

[0011] The material feeding system includes a sand storage bin, a quantitative discharging device, and a conveyor belt. The outlet of the sand storage bin is connected to the inlet of the quantitative discharging device, and the outlet of the quantitative discharging device is connected to the conveyor belt. The quantitative discharging device is used to quantitatively transport the sand in the sand storage bin to the material box through the conveyor belt according to the change of the concentration of the sediment slurry in the material box, so as to maintain the concentration of the sediment slurry in the material box.

[0012] Further, the mud pump test unit further includes a driving motor and a coupling. The driving motor is connected to the mud pump through the coupling, and the driving motor is used to provide power for the mud pump.

[0013] Further, the mud pump includes a volute, an impeller, and a pump shaft. The impeller is arranged inside the volute, the impeller is driven by the pump shaft, and the pump shaft is connected to the coupling.

[0014] Further, a feed inlet is connected to one side of the material box near its lower position, the other end of the feed inlet is connected to a feed control valve, and the bottom of the material box is connected to a discharge control valve and a drain control valve through a triangular pipeline;

[0015] The pipeline transportation system further includes connecting flanges, a vertical transportation pipeline, a first horizontal transportation pipeline, and a second horizontal transportation pipeline. The pipelines are connected through the connecting flanges. Among them: the triangular pipeline is sequentially connected to the inlet pipeline through the discharge control valve and the second horizontal transportation pipeline, and the outlet pipeline is sequentially connected to the feed inlet through the first horizontal transportation pipeline, the vertical transportation pipeline, and the feed control valve.

[0016] Further, both the first horizontal transportation pipeline and the second horizontal transportation pipeline are equipped with air-cooled chillers.

[0017] Further, several of the measurement and sensing devices include a shaft power tester, a vibration sensor, a pressure sensor, an electromagnetic flowmeter, and a concentration meter. The shaft power tester is arranged on the pump shaft for collecting the power during the operation of the slurry pump. The vibration sensor is arranged on the volute of the slurry pump for obtaining the vibration signal during the operation of the dredging slurry pump. The pressure sensor is arranged on the outlet pipeline for measuring the pressure of the slurry pump. The electromagnetic flowmeter is arranged on the vertical conveying pipeline for collecting the flow rate of the conveying medium inside the pipeline. The concentration meter is arranged on the inlet pipeline of the slurry pump for monitoring the change in the concentration of the sediment slurry entering the slurry pump.

[0018] Further, a filter port is provided near the middle position on one side of the material box, and the multi-stage filter screen is installed at the filter port.

[0019] Further, the mesh size of the multi-stage filter screen gradually decreases along the slurry flow direction.

[0020] Further, the quantitative discharging device adopts a screw feeder. The quantitative discharging device is connected to the upper computer, and the sand supplement amount is dynamically adjusted based on the concentration data fed back by the concentration meter to the upper computer. When the concentration change of the concentration meter reaches 2%, the quantitative discharging device starts to supplement sediment;

[0021] The quantitative discharging device calculates the sediment supplement amount through the following formula:

[0022] Q = K × (C0 - C t ) × V

[0023] Where: C0 is the target concentration, C t is the real-time concentration in the material box, V is the volume of the slurry in the material box, and K is the correction coefficient.

[0024] A method for using a dredging slurry pump experimental system, using the dredging slurry pump experimental system described above, includes the following steps:

[0025] Step 1): Turn on several measurement and sensing devices and zero them. Connect the measurement and sensing devices to the data acquisition instrument, set the parameters for data acquisition, and connect the data collector to the upper computer to ensure that the data can be displayed and stored in real time;

[0026] Step 2): Add clean water to the material box, start the slurry pump, make the slurry pump operate stably under the clean water condition first, then add sediment to the material box, and adjust the concentration of the sediment slurry through the material feeding system to make the sediment slurry circulate in the pipeline conveying system;

[0027] Step 3): Use a data acquisition system to collect the shaft power, vibration signal, pressure, and flow rate during the operation of the slurry pump, and transmit these signals to a data acquisition instrument. The data acquisition instrument converts the analog signals into digital signals and then transmits them to the host computer. The experimental data is recorded every 10 minutes.

[0028] Step 4): After the wear test is completed and the data acquisition is finished, turn off the slurry pump and the measurement and sensing equipment, open the discharge control valve, close the outlet control valve, and discharge the sediment slurry in the wear test platform.

[0029] Step 5): Process the performance data of the slurry pump in the host computer, extract the characteristic parameters of the vibration signal, establish the corresponding relationship between the characteristic parameters of the vibration signal and the performance of the slurry pump, and evaluate the wear condition of the slurry pump.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] (1) The dredging slurry pump wear test system of the present invention can simulate the actual working environment of the slurry pump. Through the data acquisition system, key parameters such as the shaft power, vibration signal, pressure, flow rate, and sediment slurry concentration of the slurry pump can be monitored in real time. Combined with computer data analysis, the wear condition of the slurry pump can be comprehensively and accurately evaluated, providing a scientific basis for optimizing the design and maintenance of the slurry pump. Moreover, the present invention is applicable to the slurry pump wear systems under various working conditions, can simulate the transportation process of sediment slurries with different concentrations, and provides comprehensive experimental support for dredging projects.

[0032] (2) The material feeding system of the experimental system of the present invention can dynamically adjust the sand replenishment amount according to the real-time data fed back by the concentration meter, ensure the stability of the sediment slurry concentration, avoid experimental errors caused by concentration fluctuations, and improve the reliability of experimental results.

[0033] (3) The filtration system of the experimental system of the present invention separates small particle size particles in the slurry through multiple-stage filter meshes and returns the clear water to the material tank, realizing the recycling of slurry resources, reducing material waste during the experiment, and at the same time reducing experimental costs, meeting the requirements of environmental protection and energy conservation. Brief Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the overall structure of the dredging slurry pump wear test system in Embodiment 1 of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the slurry pump test unit in Embodiment 1 of the present invention;

[0036] Figure 3 It is a schematic diagram of the overall structure of the dredging slurry pump wear test system in Embodiment 1 of the present invention (including a data acquisition instrument and a host computer);

[0037] Figure 4Schematic diagram of the structure of the material box in Embodiment 1 of the present invention;

[0038] Figure 5 Schematic diagram of the structure showing the installation position of the multi-stage filter screen in Embodiment 1 of the present invention;

[0039] Figure 6 Schematic diagram of the structure of the multi-stage filter screen in Embodiment 1 of the present invention.

[0040] In the figure: 1. Mud pump test unit; 11. Driving motor; 12. Coupling; 13. Mud pump; 14. Mud pump outlet; 15. Mud pump inlet; 16. Volute; 17. Impeller; 18. Pump shaft;

[0041] 2. Pipeline conveying system; 21. Inlet pipeline; 22. Outlet pipeline; 23. Connecting flange; 24. Vertical conveying pipeline; 25. Material box; 26. First horizontal conveying pipeline; 27. Second horizontal conveying pipeline; 28. Cooling fan; 29. Filter port; 210. Feed port; 211. Feed control valve; 212. Triangular pipeline; 213. Discharge control valve; 214. Discharge control valve;

[0042] 3. Data acquisition system; 31. Shaft power tester; 32. Vibration sensor; 33. Pressure sensor; 34. Electromagnetic flowmeter; 35. Concentration meter; 36. Data acquisition instrument; 37. Host computer;

[0043] 4. Filtration system; 41. Multi-stage filter screen; 42. Diversion pipeline; 43. Water tank; 44. Vertical pump; 45. Clean water return pipeline;

[0044] 5. Material feeding system; 51. Sand storage bin; 52. Quantitative discharging device; 53. Conveyor belt. Detailed implementation method

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0046] Embodiment 1

[0047] As Figure 1 shown, a dredging mud pump wear experiment system and its usage method include a mud pump test unit 1, a pipeline conveying system 2, a data acquisition system 3, a filtration system 4, and a material feeding system 5. The mud pump test unit 1 is connected to the pipeline conveying system 2, the data acquisition system 3 is arranged on the mud pump test unit 1 and the pipeline conveying system 2, and the pipeline conveying system 2 is also connected to the filtration system 4 and the material feeding system 5.

[0048] Specifically, Figure 1 Combined withFigure 2 As shown in the figure, the mud pump test unit 1 includes a driving motor 11, a coupling 12, a mud pump 13, a mud pump outlet 14 and a mud pump inlet 15. The driving motor 11 is connected to the mud pump 13 through the coupling 12, and the driving motor 11 is used to provide power for the mud pump 13. Moreover, the mud pump 13 includes a volute 16, an impeller 17 and a pump shaft 18. The impeller 17 is arranged in the volute 16, the impeller 17 is driven by the pump shaft 18, and the pump shaft 18 is connected to the coupling 12.

[0049] Figure 1 Combined with Figures 3-4 , the pipeline conveying system 2 includes an inlet pipeline 21, an outlet pipeline 22, a connecting flange 23, a vertical conveying pipeline 24, a material box 25, a first horizontal conveying pipeline 26 and a second horizontal conveying pipeline 27, and also includes a feed inlet 210, a feed control valve 211, a triangular pipeline 212, a discharge control valve 213 and a discharge control valve 214. Among them, the triangular pipeline 212 is connected to the bottom of the material box 25. One of the other two ends of the triangular pipeline 212 except for connecting the material box 25 is connected with the discharge control valve 213, and the other end is connected with the discharge control valve 214. The triangular pipeline 212 is sequentially connected to the inlet pipeline 21 through the discharge control valve 213 and the second horizontal conveying pipeline 27, and the inlet pipeline 21 is connected to the mud pump inlet 15; the feed inlet 210 is located on one side of the material box 25 near its lower part, the other end of the feed inlet 210 is connected with the feed control valve 211, the outlet pipeline 22 is connected to the mud pump outlet 14, and the outlet pipeline 22 is sequentially connected to the feed inlet 210 through the first horizontal conveying pipeline 26, the vertical conveying pipeline 24 and the feed control valve 211; each pipeline is connected through the connecting flange 23. Among them, the on-off of the conveying medium can be controlled by controlling the opening and closing of the valves (discharge control valve 213, discharge control valve 214, feed control valve 211).

[0050] In addition, both the first horizontal conveying pipeline 26 and the second horizontal conveying pipeline 27 are equipped with cooling fans 28. Preferably, the cooling fans 28 adopt air-cooled chillers. The air-cooled chiller is used to keep the temperature of the pipeline conveying system 2 stable.

[0051] As Figure 3 shown, the data acquisition system 3 includes a number of measurement and sensing devices, a data acquisition instrument 36 and a host computer 37. A number of measurement and sensing devices are installed on the mud pump test unit 1 and the pipeline conveying system. The measurement and sensing devices are connected to the host computer through the data acquisition instrument 36; preferably, the host computer can adopt a computer. The data collected by the data acquisition instrument 36 is provided to the computer for data processing and analysis, and the computer evaluates the wear condition of the mud pump 13 by processing and analyzing the data.

[0052] Specifically, several measurement and sensing devices include a shaft power tester 31, a vibration sensor 32, a pressure sensor 33, an electromagnetic flowmeter 34, and a concentration meter 35. The shaft power tester 31 is arranged on the pump shaft 18 to collect the power during the operation of the slurry pump 13. The vibration sensor 32 is arranged on the volute 16 of the slurry pump 13 to obtain the vibration signal during the operation of the dredging slurry pump 13. The pressure sensor 33 is arranged on the outlet pipeline 22 to measure the pressure of the slurry pump 13. The electromagnetic flowmeter 34 is arranged on the vertical conveying pipeline 24 to collect the flow rate of the conveying medium inside the pipeline. The concentration meter 35 is arranged on the inlet pipeline 21 of the slurry pump 13 to monitor the change in the concentration of the sediment slurry entering the slurry pump 13.

[0053] As Figures 3-6 shown, the filtration system 4 includes a multi-stage filter screen 41, a diversion pipeline 42, a water tank 43, a vertical pump 44, and a clear water return pipeline 45. A filter port 29 is provided near the middle position on one side of the material box 25. The multi-stage filter screen 41 is installed at the filter port 29. The inlet of the water tank 43 is connected to the material box 25 through the diversion pipeline 42 and the multi-stage filter screen 41. The multi-stage filter screen 41 and the diversion pipeline 42 are used to separate small-sized particles in the slurry and divert them to the water tank 43. The water tank 43 has a sedimentation area inside. The outlet of the water tank 43 is connected to the material box 25 through the clear water return pipeline 45 and the vertical pump 44. The clear water return pipeline 45 and the vertical pump 44 cooperate to convey the clear water in the water tank 43 back into the material box 25.

[0054] In addition, the mesh size of the multi-stage filter screen 41 gradually decreases along the slurry flow direction. By gradually reducing the mesh size, different-sized particles can be removed more effectively, making the filtration process more refined and efficient. At the same time, larger particles are intercepted by the front filter screens, avoiding the blockage and damage of the subsequent finer filter screens and extending the service life of the filtration system 4.

[0055] As Figure 1 shown in Figure 3 connection, the material feeding system 5 includes a sand storage bin 51, a metering discharging device 52, and a conveyor belt 53. The outlet of the sand storage bin 51 is connected to the inlet of the metering discharging device 52, and the outlet of the metering discharging device 52 is connected to the conveyor belt 53. The metering discharging device 52 is used to quantitatively convey the sand in the sand storage bin 51 to the material box 25 through the conveyor belt 53 according to the change in the concentration of the sediment slurry in the material box 25, so as to maintain the concentration of the sediment slurry in the material box 25.

[0056] In addition, the metering discharging device 52 adopts a screw feeder. As the screw feeder is a prior art, it will not be elaborated herein in this application.

[0057] The quantitative discharging device 52 is connected to the host computer, and dynamically adjusts the sand supplement amount based on the concentration data fed back by the concentration meter 35 to the host computer. When the concentration change of the concentration meter 35 reaches 2%, the quantitative discharging device 52 starts to supplement sediment.

[0058] The quantitative discharging device calculates the sediment supplement amount through the following formula:

[0059] Q = K × (C0 - C t ) × V

[0060] In the formula: C0 is the target concentration, C t is the real-time concentration in the material box, V is the volume of the slurry in the material box, and K is the correction coefficient.

[0061] Embodiment 2

[0062] Based on the dredging mud pump wear experiment system of Embodiment 1, this embodiment provides a usage method of the dredging mud pump experiment system, including the following usage steps:

[0063] Step 1), build a wear experiment platform for the mud pump 13:

[0064] Connect the driving motor 11 to the mud pump 13 through the coupling 12, connect the inlet pipeline 21 and the outlet pipeline 22 to the mud pump inlet 15 and the mud pump outlet 14 respectively, and use the connecting flange 23 to connect multiple sections of the conveying pipeline and the material box 25 to the mud pump test unit 1 to complete the installation of the pipeline conveying system 2; at the same time, install the shaft power tester 31, vibration sensor 32, pressure sensor 33, electromagnetic flowmeter 34, and concentration meter 35 at appropriate positions, connect each sensor to the data acquisition instrument 36, and connect the data acquisition instrument 36 to the computer to complete the layout of the data acquisition system 3.

[0065] Install the multi-stage filter screen 41 at one end of the diversion pipeline 42 and insert it into the filter port 29 of the material box 25. The other end of the diversion pipeline 42 is connected above the water tank 43. A vertical pump 44 and a clear water return pipeline 45 are connected to the lower side of one side of the water tank 43 for re-inputting the low-concentration water after sediment deposition in the water tank 43 into the material box 25; add a large amount of sediment to the sand storage bin 51 of the material feeding system 5, and at the same time turn on the quantitative discharging device 52 and the conveyor belt 53.

[0066] Step 2), conduct a wear experiment on the mud pump 13:

[0067] Turn on measuring and sensing devices such as shaft power tester 31, vibration sensor 32, pressure sensor 33, electromagnetic flowmeter 34, and concentration meter 35 and zero them. Connect the measuring and sensing devices to data collector 36 and set the parameters for data acquisition, such as acquisition frequency, acquisition time, etc. Connect the data collector to the computer to ensure that the data can be displayed and stored in real time; connect the quantitative discharging device 52 to the computer to ensure that when the concentration change of the concentration meter 35 exceeds 2%, the quantitative discharging device 52 can react and quantitatively transport sediment into the material box 25 to adjust the concentration of the sediment slurry.

[0068] Add clear water into the material box 25, start the sludge pump 13, make the sludge pump 13 first operate stably under the clear water condition, then add sediment into the material box 25, and adjust the concentration of the sediment slurry through the material feeding system 5 to make the sediment slurry circulate in the pipeline conveying system 2.

[0069] Use the shaft power tester 31, vibration sensor 32, pressure sensor 33, and electromagnetic flowmeter 34 to collect the shaft power, vibration signal, pressure, and flow rate of the sludge pump 13 respectively, and transmit these signals to the data collector 36. After the data collector 36 converts the analog signal into a digital signal, it is transmitted to the computer, and the experimental data is recorded every 10 minutes.

[0070] After the wear test is completed and the data acquisition is finished, turn off the sludge pump 13 and the measuring and sensing devices, open the discharge control valve 214, and close the discharge control valve 213 to discharge the conveying medium in the wear test system.

[0071] Step 3): Analyze the wear test data of the sludge pump 13:

[0072] Process the performance data of the sludge pump 13 in the computer, extract the characteristic parameters of the vibration signal with data analysis software, establish the corresponding relationship between the characteristic parameters of the vibration signal and the performance of the sludge pump 13, and evaluate the wear condition of the sludge pump 13.

[0073] Among them, a data analysis software is used to perform time-domain and frequency-domain analysis on the collected vibration signals, obtain the amplitude change curve of the vibration signals over time, and observe the magnitude and fluctuation of the vibration amplitudes. At the same time, frequency-domain analysis is performed on the vibration signals. The fast Fourier transform (FFT) can be used to convert the time-domain signals into frequency-domain signals, obtain the frequency distribution of the vibration signals, and determine the main vibration frequency components and the corresponding amplitudes. By analyzing the frequency-domain signals, the vibration conditions of different components inside the mud pump 13 (such as the impeller 17, bearings, etc.) can be understood. According to the vibration signal characteristic parameters of the mud pump 13 in the initial state (including vibration amplitude, main frequency and its amplitude) and the performance of the mud pump 13, as well as the vibration signal characteristic parameters and the performance of the mud pump 13 at different time points, a corresponding relationship between the vibration signal characteristic parameters and the performance of the mud pump 13 is established. It should be noted that the data analysis software is a prior art, and this application does not involve improvements thereto, so it will not be elaborated herein.

[0074] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A dredging mud pump wear experiment system and its usage method, characterized in that, It includes a slurry pump test unit, a pipeline conveying system, a data acquisition system, a filtration system, and a material feeding system, where: The slurry pump test unit includes a slurry pump, a slurry pump outlet, and a slurry pump inlet; The pipeline conveying system includes an inlet pipeline, an outlet pipeline, a conveying pipeline, and a material box. The inlet pipeline is connected to the slurry pump inlet, the outlet pipeline is connected to the slurry pump outlet, and the conveying pipeline connects the inlet pipeline, the outlet pipeline, and the material box; The data acquisition system includes several measurement and sensing devices, a data acquisition instrument, and a host computer. Several of the measurement and sensing devices are installed on the slurry pump test unit and the pipeline conveying system, and the measurement and sensing devices are connected to the host computer through the data acquisition instrument; The filtration system includes a multi-stage filter screen, a diversion pipeline, a water tank, a vertical pump, and a clean water return pipeline. The inlet of the water tank is connected to the material box through the diversion pipeline and the multi-stage filter screen. A sedimentation area is provided inside the water tank, and the outlet of the water tank is connected to the material box through the clean water return channel and the vertical pump; The material feeding system includes a sand storage bin, a quantitative discharging device, and a conveyor belt. The outlet of the sand storage bin is connected to the inlet of the quantitative discharging device, and the outlet of the quantitative discharging device is connected to the conveyor belt. The quantitative discharging device is used to quantitatively convey the sediment in the sand storage bin to the material box through the conveyor belt according to the change of the concentration of the sediment slurry in the material box to maintain the concentration of the sediment slurry in the material box.

2. The dredging mud pump wear experiment system and usage method according to claim 1, characterized in that The slurry pump test unit further includes a driving motor and a coupling. The driving motor is connected to the slurry pump through the coupling, and the driving motor is used to provide power for the slurry pump.

3. The dredging mud pump wear experiment system and usage method according to claim 2, characterized in that The slurry pump includes a volute, an impeller, and a pump shaft. The impeller is arranged in the volute and is driven by the pump shaft, and the pump shaft is connected to the coupling.

4. The dredging mud pump wear experiment system and usage method according to claim 1, characterized in that One side of the material box is connected with a feed inlet near its lower position, and the other end of the feed inlet is connected with a feed control valve. The bottom of the material box is connected with a discharge control valve and a drainage control valve through a triangular pipeline; The pipeline conveying system further includes connecting flanges, a vertical conveying pipeline, a first horizontal conveying pipeline, and a second horizontal conveying pipeline. The pipelines are connected through the connecting flanges, where: the triangular pipeline is sequentially connected to the inlet pipeline through the discharge control valve and the second horizontal conveying pipeline, and the outlet pipeline is sequentially connected to the feed inlet through the first horizontal conveying pipeline, the vertical conveying pipeline, and the feed control valve.

5. The dredging mud pump wear experiment system and usage method according to claim 4, characterized in that, Both the first horizontal conveying pipeline and the second horizontal conveying pipeline are equipped with air-cooled chillers.

6. The dredging mud pump wear experiment system and usage method according to claim 3, characterized in that Several of the measurement and sensing devices include a shaft power tester, a vibration sensor, a pressure sensor, an electromagnetic flowmeter, and a concentration meter. The shaft power tester is arranged on the pump shaft and is used to collect the power during the operation of the slurry pump. The vibration sensor is arranged on the volute of the slurry pump and is used to obtain the vibration signal during the operation of the dredging slurry pump. The pressure sensor is arranged on the outlet pipeline and is used to measure the pressure of the slurry pump. The electromagnetic flowmeter is arranged on the vertical conveying pipeline and is used to collect the flow rate of the conveying medium inside the pipeline. The concentration meter is arranged on the inlet pipeline of the slurry pump and is used to monitor the change of the concentration of the sediment slurry entering the slurry pump.

7. The dredging mud pump wear experiment system and usage method according to claim 1, characterized in that, One side of the material box is provided with a filtering port near the middle position thereof, and the multi-stage filter screen is installed at the filtering port.

8. The dredging mud pump wear experiment system and usage method according to claim 1, characterized in that The mesh size of the multi-stage filter screen gradually decreases along the slurry flow direction.

9. The dredging mud pump wear experiment system and usage method according to claim 6, characterized in that The quantitative discharging device adopts a screw feeder. The quantitative discharging device is connected to the upper computer, and dynamically adjusts the sand supplement amount based on the concentration data fed back to the upper computer by the concentration meter. When the concentration change of the concentration meter reaches 2%, the quantitative discharging device starts to supplement sediment; The quantitative discharging device calculates the sediment supplement amount through the following formula: Q = K×(C0 - C t )×V Where: C0 is the target concentration, C t is the real-time concentration in the material box, V is the volume of the slurry in the material box, and K is the correction coefficient.

10. A method for using a dredging mud pump experimental system, characterized in that, Adopt the dredging mud pump experimental system according to any one of claims 1-9, including the following steps: Step 1): Turn on several measurement and sensing devices and zero them. Connect the measurement and sensing devices to the data acquisition instrument, set the parameters of data acquisition, and connect the data collector to the upper computer to ensure that the data can be displayed and stored in real time; Step 2): Add clean water into the material box, start the mud pump, make the mud pump first operate stably under the clean water condition, then add sediment into the material box, and adjust the concentration of the sediment slurry through the material feeding system to make the sediment slurry circulate in the pipeline conveying system; Step 3): Use the data acquisition system to collect the shaft power, vibration signal, pressure and flow rate during the operation of the mud pump, and transmit these signals to the data acquisition instrument. The data acquisition instrument converts the analog signal into a digital signal and then transmits it to the upper computer. The experimental data is recorded every 10 minutes; Step 4): After the wear test is over and the data acquisition is completed, turn off the mud pump and the measurement and sensing devices, open the discharge control valve, close the discharge control valve, and discharge the sediment slurry in the wear test platform; Step 5): Process the mud pump performance data in the upper computer, extract the characteristic parameters of the vibration signal, establish the corresponding relationship between the characteristic parameters of the vibration signal and the mud pump performance, and evaluate the wear condition of the mud pump.

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