Dredging mud pump and pipeline conveying system full-performance test experiment system and use method

Abstract

The invention discloses a dredging dredge pump and pipeline conveying system full-performance test experiment system and a use method, and relates to the technical field of dredging equipment detection, the dredging dredge pump and pipeline conveying system full-performance test experiment system comprises a pump set, a pipeline conveying system, a measurement sensing system and a material box system, the pump set 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, a flow regulating valve, a cooler and a supporting frame, the conveying pipeline comprises a first pipeline, a first vertical pipeline, a reducing pipeline, a second vertical pipeline and a second pipeline, and the measurement sensor system comprises a plurality of measurement sensing devices, a data acquisition instrument and an upper computer; the material box system comprises a material box, an overflow barrel and a vacuumizing assembly. According to the invention, the blank of lack of medium and large-scale test platforms conforming to the dredge pump performance detection standard at present is filled, an accurate test result is obtained by simulating a full-scale test environment of an actual dredging working condition, and the performance of the dredge pump under the actual working condition can be accurately evaluated and optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of dredging equipment detection, and in particular to a full performance test experimental system for a dredging mud pump and a pipeline transportation system and a use method thereof. Background Art

[0002] In a series of water conservancy projects such as water dredging, river and lake regulation, and mine pool cleaning, mud pumps, as the core components of mechanical dredging systems, are responsible for sucking and transporting mixed liquids containing large amounts of mud, gravel, and other solid particles. However, their performance is affected by many factors, and there is currently a lack of a comprehensive and accurate performance testing experimental system.

[0003] Mud pumps use the principles of fluid dynamics or mechanical drive mechanisms to effectively lift complex media such as sand, soil, coral reefs, etc. in riverbeds, lakes or mines to the ground or transport them to designated locations. However, due to the complexity of the riverbed geological structure and the diversity of dredged media, mud pumps often face many challenges in actual operation. The complex and changeable riverbed environment, such as the uneven hardness of the riverbed bottom, the wide distribution of particle size, and changes in water flow velocity, will have a significant impact on the hydraulic performance of the mud pump. In addition, the difference in dredged media, such as the physical properties of the sediment such as water content, specific gravity, and hardness, will also have a direct impact on the working efficiency of the mud pump. All of the above factors lead to large differences and uncertainties in the performance of mud pumps under actual working conditions. Therefore, it is crucial to accurately evaluate and optimize the performance of mud pumps under actual working conditions.

[0004] At present, the research on the hydraulic performance of mud pumps in academia and industry mostly adopts numerical simulation methods. Although numerical simulation technology has the advantages of low cost, short cycle, and strong repeatability, it is based on certain assumptions and simplified models, and there are certain differences with the complex working conditions of mud pumps in the actual transportation process. Therefore, the numerical simulation results are often difficult to fully and accurately reflect the performance of mud pumps in actual operation.

[0005] At the same time, the performance test of the existing mud pump is still carried out on a test platform with clean water as the medium, and it is impossible to test the performance of the mud pump under the actual conveying of solid media, high head, and full power working conditions. Specifically, the current mud pump market is relatively small, while the clean water pump market is large. The testing of clean water pumps has been relatively complete, but the experimental system of the mud pump is only a small, single-function test system for scientific research purposes, and the test is carried out under clean water conditions. The cost of the mud pump test platform is high. When using mud for experiments, the mud will be continuously diluted during the transportation process and needs to be repeatedly added, and the mud will cause wear to the mud pump and pipeline, increasing the cost of the experiment. In addition, the change of the existing clean water test system to the mud test system requires the addition of more supporting facilities, and there are significant differences in the system operation methods; in addition, the existing small mud pump slurry test system has a low test mud concentration and can only be used for scientific research. It does not have the ability to perform full performance testing. Therefore, simply increasing the size of the existing small mud pump test system cannot achieve full performance testing of the mud pump under actual working conditions.

[0006] Therefore, in order to solve the problems existing in the prior art, it is of great significance to invent a full performance test experimental system that can realize mud pumping at high head and full power. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a full performance test experimental system and a method for using a dredging mud pump and a pipeline transportation system, which can realize the full performance test of the mud pump under high head and full power conditions, and provide guidance for accurately evaluating and optimizing the performance of the mud pump under actual working conditions.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A full performance test experimental system for dredging mud pump and pipeline transportation system, including a pump group, a pipeline transportation system, a measurement sensor system, and a material box system, wherein:

[0010] The pump group includes a mud pump, a mud pump outlet and a mud pump inlet;

[0011] The pipeline transportation system includes an inlet pipeline, an outlet pipeline, a transportation pipeline, a flow regulating valve, a cooler, and a support frame, wherein the transportation pipeline includes a first pipeline, a first vertical pipeline, a reducing pipeline, a second vertical pipeline, and a second pipeline. One end of the first pipeline is connected to the inlet pipeline, and the other end is sequentially connected to the first vertical pipeline, the reducing pipeline, the second vertical pipeline, and the second pipeline until one end of the outlet pipeline. The other end of the inlet pipeline is connected to the mud pump outlet, and the other end of the outlet pipeline is connected to the mud pump outlet. The flow regulating valve is arranged on the first pipeline, and the support frame is arranged below the first pipeline to change the pipeline posture. The cooler is arranged in the second vertical pipeline, and the water flow direction in the cooler is opposite to the flow direction of the transport medium.

[0012] The measuring sensor system includes a plurality of measuring sensor devices, a data acquisition instrument and a host computer, wherein the plurality of measuring sensor devices are installed on the pump group and the pipeline transportation system, and the measuring sensor devices are connected to the host computer via the data acquisition instrument;

[0013] The material box system includes a material box, an overflow barrel, and a vacuum assembly. A box cover is provided on the top of the material box, and a feeding hole and a vent valve are provided on the box cover. A feed port is connected to the lower position of one side of the material box, and the other end of the feed port is connected to the second pipeline via a feed control valve. The bottom of the material box is connected to a discharge control valve and a discharge control valve via a triangular pipeline, and the discharge control valve is connected to the second pipeline via the discharge port, and the discharge control valve is connected to the discharge port. A circulation control valve is provided on the second pipeline and between the feed port and the discharge port. The overflow barrel is located in the material box and can move up or down in the material box. The vacuum assembly is connected to the material box.

[0014] Furthermore, the pump group also includes a driving motor and a coupling, the driving motor is connected to the mud pump via the coupling, and the driving motor is used to provide power for the mud pump.

[0015] Furthermore, the delivery pipeline adopts a combined structure of a steel pipeline, a plexiglass pipeline, and a rubber pipeline.

[0016] Furthermore, each section of the pipeline in the delivery pipeline system is connected via a connecting flange.

[0017] Furthermore, the first pipeline is a horizontal pipeline.

[0018] Furthermore, the first pipeline is an inclined pipeline, and the support frame is equipped with a lifting valve and a roller. The lifting valve and the roller are used to work together to adjust the position of the support frame so that the first pipeline forms an inclined pipeline with different degrees of bending posture and different angles, and the number of pipeline sections is increased or decreased to extend or shorten the inclined pipeline. A pipeline pressure sensor for measuring the pressure in the inclined pipeline is also installed in the middle of each section of the inclined pipeline.

[0019] Furthermore, each section of the variable diameter pipeline is connected through a variable diameter interface, and the variable diameter pipeline and the flow regulating valve jointly adjust the head of the mud pump to fully simulate the operation of the mud pump under different working conditions and realize full head performance testing.

[0020] Furthermore, the cooler has a water inlet and a water outlet, the water inlet is located at the lower end of the cooler, and the water outlet is located at the upper end of the cooler.

[0021] Furthermore, the measuring sensing equipment includes a shaft power measuring instrument for detecting the power of the mud pump, an inlet pressure sensor for detecting the inlet pressure of the mud pump, an outlet pressure sensor for detecting the outlet pressure of the mud pump, a vacuum gauge for detecting the vacuum degree in the pipeline, an electromagnetic flowmeter for detecting the outlet flow of the mud pump, and a concentration meter for detecting the concentration of the conveying medium in the pipeline, wherein the shaft power measuring instrument is arranged between the driving motor and the mud pump, the inlet pressure sensor and the vacuum gauge are arranged on the inlet pipeline, the outlet pressure sensor is arranged on the outlet pipeline, and the electromagnetic flowmeter and the concentration meter are arranged on the first vertical pipeline.

[0022] Furthermore, the inlet pressure sensor and the outlet pressure sensor both include a conveying medium inlet, a pressure measuring box, an air outlet, an air outlet valve, a silt outlet, a silt outlet valve, and a sensor. The conveying medium inlet is connected to the pressure measuring box. The air outlet is arranged at the top of the pressure measuring box, and the silt outlet is arranged at the bottom of the pressure measuring box. The air outlet valve and the silt outlet valve are respectively arranged on the air outlet and the silt outlet to control the on and off of the air outlet and the silt outlet. The air outlet is a one-way outlet so that outside air cannot enter the pressure measuring box through the outlet. The silt outlet is used to discharge excess silt entering the pressure measuring box to ensure the stability of the measured pressure. The sensor is connected to the pressure measuring box.

[0023] Furthermore, the material box system also includes a manual switch, which is installed on the material box. The manual switch is used to open the box cover when no experiment is performed to perform maintenance and repair on the internal equipment of the material box.

[0024] Furthermore, the material box system also includes a motor, a support rod, a screw, and a connecting rod. The motor is connected to the box cover through the support rod, and the motor and the screw are connected as a whole. The overflow barrel is arranged at the center position of the material box, and its upper end is connected to the screw through the connecting rod, and the lower end passes through the lower outlet of the material box, and the outer diameter of the overflow barrel is consistent with the inner diameter of the lower outlet of the material box. The motor drives the screw to rotate up or down to drive the overflow barrel to rise or fall to adjust the height of the overflow barrel.

[0025] Furthermore, the material box system also includes a fixing device, which is installed in the material box and fixes the overflow bucket, and there is a 2-3mm buffer gap between the fixing device and the overflow bucket.

[0026] Furthermore, the material box system further comprises a positioning frame, which is fixed to the bottom of the overflow bucket and is used to position the overflow bucket;

[0027] When the overflow bucket is in the initial position, its bottom will block the lower outlet of the material box so that the solid conveying medium in the material box cannot enter the pipeline conveying system; when the overflow bucket is adjusted to the highest position, part of the height of the positioning frame is still below the lower outlet of the material box to ensure that the overflow bucket can smoothly penetrate into the lower outlet of the material box when it is adjusted downward.

[0028] Furthermore, the vacuum pump assembly includes an air extraction pipeline and a vacuum pump. One end of the air extraction pipeline penetrates the box cover and is inserted into the material box, and the other end is connected to the vacuum pump. The vacuum pump is used to extract air from the material box to perform a vacuum test on the dredging mud pump.

[0029] A method for using a full performance test experimental system for a dredging mud pump and a pipeline transportation system, using the full performance test experimental system for a dredging mud pump and a pipeline transportation system, comprising the following steps:

[0030] Step 1), turn on the shaft power measuring instrument, the inlet pressure sensor, the outlet pressure sensor, the vacuum gauge, the electromagnetic flow meter, the concentration meter and other measuring and sensing devices and calibrate them to zero, and connect the measuring and sensing devices to the data acquisition instrument;

[0031] Step 2), open the feeding hole of the material box, load the silt into the material box, at this time the overflow bucket is at the lowest position, after the silt is loaded, inject clean water into the material box until the water level is 30-50cm higher than the overflow bucket, open the discharge control valve, start the mud pump, and make the mud pump run under clean water conditions;

[0032] Step 3), after the mud pump runs stably and the pressure measuring box of the inlet pressure sensor is filled with clean water, start the motor to rotate the screw upward to drive the overflow bucket to rise, adjust the height of the overflow bucket to a suitable position, so that the mud and sand in the material box can enter the pipeline conveying system from the outlet at the lower end of the material box, open the vent valve and the cooler, and jointly adjust the flow regulating valve and the variable diameter pipeline to the required test head, open the feed control valve, close the circulation control valve and the discharge control valve, so that the material is circulated and transported in the pipeline conveying system, mud pump and material box;

[0033] Step 4), collect the inlet pressure, outlet pressure, shaft power and flow rate data during the medium transportation process;

[0034] Step 5) After data collection is completed, turn off the measuring sensor equipment, open the discharge control valve, close the discharge control valve, and discharge the material from the discharge port. After all the materials are discharged, turn off the mud pump, cooler, etc., and further process the measured mud pump performance data. Shaft power measuring instrument

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The present invention provides a full performance test experimental system for dredging mud pumps and pipeline transportation systems, which fills the gap in the existing market for medium and large test platforms that meet the performance testing standards for dredging mud pumps. By simulating a full-scale test environment of actual dredging conditions, accurate test results can be obtained, and favorable support can be provided for accurately evaluating and optimizing the performance of mud pumps under actual conditions;

[0037] 2. The present invention is equipped with a flexible pipeline transportation system. By arranging pipelines of various materials (such as steel pipelines, plexiglass pipelines, rubber pipelines), and installing concentration meters, electromagnetic flow meters, and vertical pipelines, the measurement data can be made more accurate; in addition, the supporting frame can realize the inclined state of the pipeline, and the performance test under the inclined transportation state can be completed, which further enhances the flexibility of the test.

[0038] 3. The outlet and inlet pressure sensors provided in the present invention measure the average pressure of two points when measuring pressure, which solves the defect of strong fluctuation of single-point pressure measurement. At the same time, the pressure sensor is equipped with an air outlet and a sediment outlet, which can effectively prevent air and sediment from entering the sensor, thereby avoiding them from interfering with the measurement results and ensuring more accurate measurement data.

[0039] 4. The material box system of the present invention is equipped with an overflow bucket, a motor and a screw, which realizes the precise control and cyclic delivery of the conveying medium. At the same time, the liquid level in the material box can be controlled by adjusting the height of the overflow bucket to ensure the accuracy and repeatability of the test; in addition, the system supports closed-loop delivery and cyclic delivery through the material box, which improves the flexibility and efficiency of the test and reduces the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of the pump group in Example 1 of the present invention;

[0042] Figure 3 This is a schematic diagram of the structure of the delivery pipeline system in Example 1 of the present invention;

[0043] Figure 4 Schematic diagram of the arrangement of the measurement sensor system in Example 1 of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of the pressure sensors at the inlet and outlet in Example 1 of the present invention;

[0045] Figure 6 This is a schematic diagram of the external structure of the material box system in Example 1 of the present invention;

[0046] Figure 7 This is a schematic diagram of the internal structure of the material box system in Example 1 of the present invention;

[0047] Figure 8 This is a schematic diagram of the structure of the inclined pipeline in Example 2 of the present invention.

[0048] In the figure: 1, pump group; 11, mud pump; 12, mud pump outlet; 13, mud pump inlet; 14, drive motor; 15, coupling;

[0049] 2. Pipeline transportation system; 21. Inlet pipeline; 22. Outlet pipeline; 23. Transportation pipeline; 231. First pipeline; 232. First vertical pipeline; 233. Variable diameter pipeline; 234. Second vertical pipeline; 235. Second pipeline; 24. Flow regulating valve; 25. Cooler; 26. Support frame; 27. Connection flange; 28. Water inlet; 29. ​​Water outlet; 210. Variable diameter interface; 211. Lifting valve; 212. Roller;

[0050] 3. Measurement sensor system; 31. Shaft power measuring instrument; 32. Inlet pressure sensor; 33. Outlet pressure sensor; 34. Vacuum gauge; 35. Electromagnetic flowmeter; 36. Concentration meter; 37. Data acquisition instrument; 38. Host computer; 39. Conveying medium inlet; 310. Pressure measuring box; 311. Air outlet; 312. Air outlet valve; 313. Sediment outlet; 314. Sediment outlet valve; 315. Sensor; 316. Pipeline pressure sensor;

[0051] 4. Material box system; 41. Material box; 42. Overflow bucket; 43. Vacuum assembly; 431. Exhaust pipeline; 432. Vacuum pump; 44. Box cover; 45. Feed port; 46. Feed control valve; 47. Triangular pipeline; 48. Discharge control valve; 49. Discharge control valve; 410. Discharge port; 411. Discharge port; 412. Circulation control valve; 413. Manual switch; 414. Motor; 415. Support rod; 416. Screw; 417. Connecting rod; 418. Fixing device; 419. Positioning frame; 420. Feeding hole; 421. Vent valve. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0053] Example 1

[0054] like Figure 1 As shown, a full performance test experimental system for a dredging mud pump and a pipeline transportation system includes a pump group 1, a pipeline transportation system 2, a measuring sensor system 3, and a material box system 4. The pump group 1 is connected to the material box system 4 through the pipeline transportation system 2, and the measuring sensor system 3 is arranged on the pump group 1 and the pipeline transportation system 2.

[0055] Specifically, Figure 1 Combination Figure 2 As shown, the pump assembly 1 includes a mud pump 11 and a mud pump outlet 12 and a mud pump inlet 13 located on the mud pump 11 , and also includes a drive motor 14 and a coupling 15 . The coupling 15 connects the drive motor 14 and the mud pump 11 , and the drive motor 14 provides power for the mud pump 11 .

[0056] Figure 1 Combination Figure 3 As shown, the pipeline transportation system 2 includes an inlet pipeline 21, an outlet pipeline 22, a transportation pipeline 23, a flow regulating valve 24, a cooler 25, and a support frame 26, wherein:

[0057] One end of the inlet pipeline 21 is connected to the mud pump outlet 12, and one end of the outlet pipeline 22 is connected to the mud pump inlet 13, wherein the delivery pipeline 23 includes a first pipeline 231, a first vertical pipeline 232, a reducing pipeline 233, a second vertical pipeline 234, and a second pipeline 235. One end of the first pipeline 231 is connected to the other end of the inlet pipeline 21, and the other end of the first pipeline 231 is connected to the first vertical pipeline 232, the reducing pipeline 233, the second vertical pipeline 234, the second pipeline 235 in sequence until the other end of the outlet pipeline 22. The various pipeline sections in the delivery pipeline 23 system are connected through a connecting flange 27.

[0058] The flow regulating valve 24 is arranged on the first pipeline 231 and is used to regulate the flow of the medium passing through the delivery pipeline 23 .

[0059] The cooler 25 is arranged in the second vertical pipeline 234. The cooler 25 has a water inlet 28 and a water outlet 29. The water inlet 28 is located at the lower end of the cooler 25, and the water outlet 29 is located at the upper end of the cooler 25. The water flow direction in the cooler 25 is opposite to the flow direction of the conveying medium in the conveying pipeline system, which is used to maintain the stability of the temperature of the pipeline conveying system.

[0060] The support frame 26 is disposed below the first pipeline 231 and is used to support and fix the pipeline.

[0061] More specifically, the first pipeline 231 and the second pipeline 235 are both horizontal pipelines. At this time, the system can implement a test experiment of the mud pump 11 under the horizontal pipeline.

[0062] In addition, the delivery pipeline 23 adopts a combination structure of steel pipelines, organic glass pipelines, and rubber pipelines. The pipelines of these three materials are arranged on the delivery pipeline 23 at the same time, among which the steel pipeline is used to realize normal medium transportation; the organic glass pipeline can observe the flow of the conveying medium in the pipeline due to its transparent characteristics; the rubber pipeline can meet the bending requirements of the delivery pipeline 23 due to its bendable characteristics, such as when the pipeline is tilted. It should be noted that the present application does not make specific restrictions on the arrangement positions of the pipelines of the three materials, and the technical solutions of arranging the pipelines of the three materials on the delivery pipeline 23 at the same time should be regarded as within the protection scope of the present application.

[0063] Each section of the pipeline on the variable diameter pipeline 233 is connected through the variable diameter interface 210. The variable diameter pipeline 233 and the flow control valve 24 jointly adjust the head of the mud pump 11 to fully simulate the operation of the mud pump 11 under different working conditions and realize the full head performance test. During the specific detection operation, the variable diameter pipeline 233 adjusts the pressure and flow rate of the fluid in the pipeline by changing the pipeline diameter, and the flow control valve 24 accurately controls the output flow of the mud pump 11 by adjusting the opening of the valve. The variable diameter pipeline 233 and the flow control valve 24 cooperate with each other during the adjustment process, and the comprehensive adjustment of the mud pump head is realized by reasonably matching the parameters of the variable diameter pipeline 233 and the flow control valve 24.

[0064] like Figure 1 Combination Figure 4 As shown, the measuring sensor 315 system includes several measuring sensor devices, a data acquisition instrument 37 and a host computer 38, wherein: several measuring sensor devices are installed on the pump group 1 and the pipeline transportation system 2, including a shaft power measuring instrument 31 for detecting the mud pump power, an inlet pressure sensor 32 for detecting the pressure of the mud pump inlet 13, an outlet pressure sensor 33 for detecting the pressure of the mud pump outlet 12, a vacuum gauge 34 for detecting the vacuum degree in the pipeline, an electromagnetic flowmeter 35 for detecting the flow rate of the mud pump outlet 12, and a concentration meter 36 for detecting the concentration of the transported medium in the pipeline, wherein the shaft power measuring instrument 31 is arranged between the drive motor 14 and the mud pump 11, the inlet pressure sensor 32 and the vacuum gauge 34 are arranged on the inlet pipeline 21, the outlet pressure sensor 33 is arranged on the outlet pipeline 22, and the electromagnetic flowmeter 35 and the concentration meter 36 are arranged on the first vertical pipeline 232. The measuring sensor equipment is connected to the host computer 38 via the data acquisition device 37. The data collected by the data acquisition device 37 is provided to the host computer for data processing and analysis. The host computer 38 processes and analyzes the data to study the performance of the mud pump 11. Preferably, the host computer 38 can be a computer.

[0065] More specifically, combined with Figure 5 As shown, the inlet pressure sensor 32 and the outlet pressure sensor 33 both include a conveying medium inlet 39, a pressure measuring box 310, an air outlet 311, an air outlet valve 312, a sediment outlet 313, a sediment outlet valve 314, and a sensor 315. The conveying medium inlet 39 is connected to the pressure measuring box 310, the air outlet 311 is arranged at the top of the pressure measuring box 310, and the sediment outlet 313 is arranged at the bottom of the pressure measuring box 310. The air outlet valve 312 and the sediment outlet valve 314 are respectively arranged on the air outlet 311 and the sediment outlet 313 to control the on-off of the air outlet 311 and the sediment outlet 313, wherein the air outlet 311 is a one-way outlet so that the outside air cannot enter the pressure measuring box 310 through the outlet, and the sediment outlet 313 is used to discharge the excess sediment entering the pressure measuring box 310 to ensure the stability of the measured pressure, and the sensor 315 is connected to the pressure measuring box 310.

[0066] When the concentration meter 36 is installed on the horizontal pipeline, due to the effect of gravity, the particles in the fluid may have a certain degree of sedimentation and stratification, which causes the data measured by the concentration meter 36 to deviate from the actual value. Therefore, in the embodiment, a first vertical pipeline 232 and a second vertical pipeline 234 are set, and the first vertical pipeline 232 and the second vertical pipeline 234 are perpendicular to the first pipeline 231 and the second pipeline 235 in a horizontal state, so that the first vertical pipeline 232 and the second vertical pipeline 234 cooperate with the concentration meter 36 and the electromagnetic flowmeter 35 installed in the flow sensing system. In this way, when the liquid flows in the vertical direction, the sedimentation or stratification of the particles will be alleviated, thereby improving the accuracy of the measurement results.

[0067] Figure 1 Combination Figure 6 , 7As shown, the material box system 4 includes a material box 41, an overflow bucket 42, and a vacuum assembly 43, wherein a box cover 44 that can be opened or closed is provided on the top of the material box 41, and a feeding hole 420 and a vent valve 421 are provided on the box cover 44. The feeding hole 420 is used to realize the addition of materials during the experiment. The function of the vent valve 421 is that during normal tests, the vacuum assembly 43 is not opened, and the vent valve 421 is opened. During cavitation experiments, the vent valve 421 is closed and the vacuum assembly 43 is opened; a feed port 45 is connected to the lower position of one side of the material box, and the other end of the feed port 45 is connected to the second pipeline 235 through a feed control valve 46, and the bottom of the material box 41 is connected to a discharge control valve 48 and a discharge control valve through a triangular pipeline 47. 49, the discharge control valve 48 is connected to the second pipeline 235 via the discharge port 410, and the feed port 45 is located upstream of the medium flow in the pipeline, and the discharge port 410 is located downstream of the medium flow in the pipeline, the discharge control valve 49 is connected to the discharge port 411, and a circulation control valve 412 is provided on the second pipeline 235 and between the feed port 45 and the discharge port 410, and each control valve is used to control the on and off of the medium delivery; the overflow bucket 42 is used to deliver clean water to the test system at the beginning of the test and to deliver the low-concentration medium on the upper part of the material box 41 to the test system again during the test. It is located in the material box 41 and can move up or down in the material box 41; the vacuum assembly 43 is connected to the material box 41.

[0068] During the conveying process, the conveying medium can be conveyed in a closed loop in the conveying pipeline 23 and in a circulating way through the material box 41. When the feed control valve 46 is closed and the circulation control valve 412 is opened, the conveying medium is circulated in the pipeline conveying system and the mud pump 11; when the feed control valve 46 and the discharge control valve 48 are opened and the circulation control valve 412 and the discharge control valve 49 are closed, the conveying medium is circulated in the pipeline conveying system, the mud pump 11 and the material box 41.

[0069] More specifically, the opening and closing method of the box cover 44 in one possible embodiment is: the material box system 4 also includes a manual switch 413, and the manual switch 413 is installed on the material box 41. When no experiment is performed, the manual switch 413 is used to open the box cover to perform maintenance and repair on the internal equipment of the material box.

[0070] The specific implementation method of the overflow bucket 42 to make the overflow bucket 42 rise or fall is in one possible embodiment: the material box system 4 also includes a motor 414, a support rod 415, a screw 416, and a connecting rod 417. The motor 414 is connected to the box cover 44 through the support rod 415, and the motor 414 and the screw 416 are connected as a whole. The overflow bucket 42 is arranged at the center position in the material box 41, and its upper end is connected to the screw 416 through the connecting rod 417, and the lower end passes through the lower outlet of the material box 41, and the outer diameter of the overflow bucket 42 is consistent with the inner diameter of the lower outlet of the material box 41. The motor 414 drives the screw 416 to rotate up or down to drive the overflow bucket 42 to rise or fall to adjust the height of the overflow bucket 42.

[0071] In addition, the material box system 4 also includes a fixing device 418, which is installed in the material box 41 and annularly fixes the overflow bucket 42 to play a certain fixing role on the overflow bucket 42 in the radial direction, and there is a 2-3mm buffer gap between the fixing device 418 and the overflow bucket 42 to ensure that the height of the overflow bucket 42 can be adjusted up and down.

[0072] The material box system 4 also includes a positioning frame 419, which is fixed to the bottom of the overflow barrel 42 and is used to position the overflow barrel 42, and its height is preferably 0.5m; the initial position of the overflow barrel 42 is: the top of the overflow barrel 42 is preferably 1m away from the box cover 44; the maximum height of the overflow barrel 42 that can be adjusted is 0.4m; when the overflow barrel 42 is in the initial position, the bottom of the overflow barrel 42 will block the lower outlet of the material box 41 so that the conveying medium in the material box 41 cannot enter the pipeline conveying system 2; when the overflow barrel 42 is adjusted to the highest position, part of the height of the positioning frame 419 is still below the lower outlet of the material box 41 to ensure that the overflow barrel 42 can smoothly penetrate into the lower outlet of the material box 41 when adjusted downward.

[0073] In a possible embodiment, the vacuum assembly 43 includes an exhaust pipe 431 and a vacuum pump 432. One end of the exhaust pipe 431 penetrates the box cover 44 and is inserted into the material box 41, and the other end is connected to the vacuum pump 432. The vacuum pump 432 is used to extract air from the material box 41 to perform a vacuum test on the dredging mud pump 11.

[0074] Example 2

[0075] The difference between this embodiment and embodiment 1 is that: Figure 8As shown, the support frame 26 is also used to change the posture of the delivery pipeline 23. At this time, the first pipeline 231 is an inclined pipeline to realize the mud pump test experiment under the inclined pipeline. Specifically, the support frame 26 is equipped with a lifting valve 211 and a roller 212. The lifting valve 211 is used to realize the lifting and lowering of the support frame 26, and the roller 212 is used to realize the convenient movement of the support frame 26 during lifting and lowering. The lifting valve 211 and the roller 212 cooperate to adjust the position of the support frame 26 so that the first pipeline 231 forms an inclined pipeline with different degrees of bending posture and different angles. In addition, the inclined pipeline can be extended or shortened by increasing or decreasing the number of pipeline sections according to the performance requirements of the mud pump 11, and when the mud pump 11 is tested under the inclined pipeline, a pipeline pressure sensor 316 for measuring the pressure in the inclined pipeline is also installed in the middle of each section of the inclined pipeline.

[0076] Example 3

[0077] This embodiment provides a method for using a dredging mud pump and a pipeline transportation system full performance test experimental system, using the dredging mud pump 11 and the pipeline transportation system 2 full performance test experimental system provided in Example 1 and Example 2, including the following steps:

[0078] Step 1), turn on the shaft power measuring instrument 31, the inlet pressure sensor 32, the outlet pressure sensor 33, the vacuum gauge 34, the electromagnetic flowmeter 35, the concentration meter 36 and other measuring and sensing devices and calibrate them to zero, and connect the measuring and sensing devices to the data acquisition instrument 37;

[0079] Step 2), open the feeding hole 420 of the material box 41, load the silt into the material box 41, at this time the overflow bucket 42 is at the lowest position, after the silt is loaded, inject clean water into the material box 41 until the water level is 30-50 cm higher than the overflow bucket 42, open the discharge control valve 48, start the mud pump 11, and make the mud pump run under the clean water condition;

[0080] Step 3), after the mud pump 11 runs stably and the pressure measuring box 310 of the inlet pressure sensor 32 is filled with clean water, the motor 414 is started to rotate the screw 416 upward to drive the overflow bucket 42 to rise, and the height of the overflow bucket 42 is adjusted to a suitable position, so that the mud and sand in the material box 41 can enter the pipeline conveying system from the outlet 410 at the lower end of the material box 41, open the vent valve 421 and the cooler 25, and jointly adjust the flow regulating valve 24 and the variable diameter pipeline 233 to the required test head, open the feed control valve 46, close the circulation control valve 412 and the discharge control valve 49, so that the material is circulated and transported in the pipeline conveying system, the mud pump 11 and the material box 41;

[0081] Step 4), collect the inlet pressure, outlet pressure, shaft power and flow rate data during the medium transportation process;

[0082] Step 5), after data collection is completed, close the measuring sensor equipment, open the discharge control valve 49, close the discharge control valve 48, and discharge the material from the discharge port 411. After all the materials are discharged, close the mud pump 11, cooler 25, etc., and further process the measured performance data of the mud pump 11.

[0083] The present invention designs a full performance test experimental system and use method for a dredging mud pump and a pipeline transportation system, which can simulate performance tests under various working conditions. In addition to the dredging mud pump performance test under different lift working conditions, the mud pump operating power can also be adjusted to evaluate the mud pump performance under different power levels; different inlet pressures can be formed to the cavitation pressure critical point of the mud pump by vacuuming with a vacuum pump to achieve the mud pump cavitation performance test; the position and height of the support frame can be flexibly changed by adjusting the lifting valve and the roller, so that the rubber pipe presents different degrees of bending postures, and an inclined pipeline is constructed, thereby testing the conveying capacity of the dredging mud pump under the inclined working condition.

[0084] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A full performance test experimental system for dredging mud pump and pipeline transportation system, characterized in that: It includes pump set, pipeline transportation system, measurement sensor system and material box system, among which: The pump group includes a mud pump, a mud pump outlet and a mud pump inlet; The pipeline transportation system includes an inlet pipeline, an outlet pipeline, a transportation pipeline, a flow regulating valve, a cooler, and a support frame, wherein the transportation pipeline includes a first pipeline, a first vertical pipeline, a reducing pipeline, a second vertical pipeline, and a second pipeline. One end of the first pipeline is connected to the inlet pipeline, and the other end is sequentially connected to the first vertical pipeline, the reducing pipeline, the second vertical pipeline, and the second pipeline until one end of the outlet pipeline. The other end of the inlet pipeline is connected to the mud pump outlet, and the other end of the outlet pipeline is connected to the mud pump outlet. The flow regulating valve is arranged on the first pipeline, and the support frame is arranged below the first pipeline to change the pipeline posture. The cooler is arranged in the second vertical pipeline, and the water flow direction in the cooler is opposite to the flow direction of the transport medium. The measuring sensor system includes a plurality of measuring sensor devices, a data acquisition instrument and a host computer, wherein the plurality of measuring sensor devices are installed on the pump group and the pipeline transportation system, and the measuring sensor devices are connected to the host computer via the data acquisition instrument; The material box system includes a material box, an overflow barrel, and a vacuum assembly. A box cover is provided on the top of the material box, and a feeding hole and a vent valve are provided on the box cover. A feed port is connected to the lower position of one side of the material box, and the other end of the feed port is connected to the second pipeline via a feed control valve. The bottom of the material box is connected to a discharge control valve and a discharge control valve via a triangular pipeline, and the discharge control valve is connected to the second pipeline via the discharge port, and the discharge control valve is connected to the discharge port. A circulation control valve is provided on the second pipeline and between the feed port and the discharge port. The overflow barrel is located in the material box and can move up or down in the material box. The vacuum assembly is connected to the material box.

2. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The pump group also includes a driving motor and a coupling. The driving motor is connected to the mud pump via the coupling. The driving motor is used to provide power for the mud pump.

3. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The delivery pipeline adopts a combined structure of a steel pipeline, an organic glass pipeline and a rubber pipeline.

4. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The various pipeline sections in the delivery pipeline system are connected via connecting flanges.

5. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The first pipeline is a horizontal pipeline.

6. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The first pipeline is an inclined pipeline, and the support frame is equipped with a lifting valve and a roller. The lifting valve and the roller are used to work together to adjust the position of the support frame so that the first pipeline forms an inclined pipeline with different degrees of bending posture and different angles, and increase or decrease the number of pipeline sections to extend or shorten the inclined pipeline. A pipeline pressure sensor for measuring the pressure in the inclined pipeline is also installed in the middle of each section of the inclined pipeline.

7. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 6 is characterized in that: Each section of the variable diameter pipeline is connected through a variable diameter interface. The variable diameter pipeline and the flow regulating valve are combined to adjust the head of the mud pump to fully simulate the operation of the mud pump under different working conditions and realize the full head performance test.

8. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The cooler has a water inlet and a water outlet, wherein the water inlet is located at the lower end of the cooler, and the water outlet is located at the upper end of the cooler.

9. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The measuring sensing equipment includes a shaft power measuring instrument for detecting the power of the mud pump, an inlet pressure sensor for detecting the inlet pressure of the mud pump, an outlet pressure sensor for detecting the outlet pressure of the mud pump, a vacuum gauge for detecting the vacuum degree in the pipeline, an electromagnetic flowmeter for detecting the outlet flow of the mud pump, and a concentration meter for detecting the concentration of the transported medium in the pipeline, wherein the shaft power measuring instrument is arranged between the driving motor and the mud pump, the inlet pressure sensor and the vacuum gauge are arranged on the inlet pipeline, the outlet pressure sensor is arranged on the outlet pipeline, and the electromagnetic flowmeter and the concentration meter are arranged on the first vertical pipeline.

10. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The inlet pressure sensor and the outlet pressure sensor both include a conveying medium inlet, a pressure measuring box, an air outlet, an air outlet valve, a sediment outlet, a sediment outlet valve, and a sensor. The conveying medium inlet is connected to the pressure measuring box. The air outlet is arranged at the top of the pressure measuring box, and the sediment outlet is arranged at the bottom of the pressure measuring box. The air outlet valve and the sediment outlet valve are respectively arranged on the air outlet and the sediment outlet to control the on-off of the air outlet and the sediment outlet. The air outlet is a one-way outlet so that outside air cannot enter the pressure measuring box through the outlet. The sediment outlet is used to discharge excess sediment entering the pressure measuring box to ensure the stability of the measured pressure. The sensor is connected to the pressure measuring box.

11. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The material box system also includes a manual switch, which is installed on the material box. The manual switch is used to open the box cover when no experiment is performed to perform maintenance and repair on the internal equipment of the material box.

12. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The material box system also includes a motor, a support rod, a screw rod, and a connecting rod. The motor is connected to the box cover through the support rod, and the motor and the screw rod are connected as a whole. The overflow barrel is arranged at the center position in the material box, and its upper end is connected to the screw rod through the connecting rod, and the lower end passes through the lower outlet of the material box. The outer diameter of the overflow barrel is consistent with the inner diameter of the lower outlet of the material box. The motor drives the screw rod to rotate up or down to drive the overflow barrel up or down to adjust the height of the overflow barrel.

13. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The material box system also includes a fixing device, which is installed in the material box and fixes the overflow bucket, and there is a 2-3mm buffer gap between the fixing device and the overflow bucket.

14. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The material box system further includes a positioning frame, which is fixed to the bottom of the overflow bucket and is used to position the overflow bucket; When the overflow bucket is in the initial position, its bottom will block the lower outlet of the material box so that the solid conveying medium in the material box cannot enter the pipeline conveying system; when the overflow bucket is adjusted to the highest position, part of the height of the positioning frame is still below the lower outlet of the material box to ensure that the overflow bucket can smoothly penetrate into the lower outlet of the material box when it is adjusted downward.

15. The full performance test experimental system for dredging mud pump and pipeline transportation system according to claim 1 is characterized in that: The vacuum pump assembly includes an air extraction pipeline and a vacuum pump. One end of the air extraction pipeline penetrates the box cover and is inserted into the material box, and the other end is connected to the vacuum pump. The vacuum pump is used to extract air from the material box to perform a vacuum test on the dredging mud pump.

16. A method for using a full performance test system for a dredging mud pump and a pipeline transportation system, characterized in that: The full performance test experimental system for the dredging mud pump and pipeline transportation system according to any one of claims 1 to 15 comprises the following steps: Step 1), turn on the shaft power measuring instrument, the inlet pressure sensor, the outlet pressure sensor, the vacuum gauge, the electromagnetic flow meter, the concentration meter and other measuring and sensing devices and calibrate them to zero, and connect the measuring and sensing devices to the data acquisition instrument; Step 2), open the feeding hole of the material box, load the silt into the material box, at this time the overflow bucket is at the lowest position, after the silt is loaded, inject clean water into the material box until the water level is 30-50cm higher than the overflow bucket, open the discharge control valve, start the mud pump, and make the mud pump run under clean water conditions; Step 3), after the mud pump runs stably and the pressure measuring box of the inlet pressure sensor is filled with clean water, start the motor to rotate the screw upward to drive the overflow bucket to rise, adjust the height of the overflow bucket to a suitable position, so that the mud and sand in the material box can enter the pipeline conveying system from the outlet at the lower end of the material box, open the vent valve and the cooler, and jointly adjust the flow regulating valve and the variable diameter pipeline to the required test head, open the feed control valve, close the circulation control valve and the discharge control valve, so that the material is circulated and transported in the pipeline conveying system, mud pump and material box; Step 4), collect the inlet pressure, outlet pressure, shaft power and flow rate data during the medium transportation process; Step 5) After data collection is completed, turn off the measuring sensor equipment, open the discharge control valve, close the discharge control valve, and discharge the material from the discharge port. After all the materials are discharged, turn off the mud pump, cooler, etc., and further process the measured mud pump performance data.

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