Mud pump characteristic test measurement system capable of simulating complex construction environment

Abstract

The application discloses a kind of mud pump characteristic test measurement systems that can simulate complex construction environment, comprising: construction environment simulation subsystem, in-pipe circulation subsystem, silt injection subsystem and data acquisition subsystem.Construction environment simulation subsystem is used to drive test mud pump and visual sensor in two two vertical vertical direction, the axial direction and lateral movement of the test mud pump.In-pipe circulation subsystem includes: circulation pipeline, mud pump driving motor, test mud pump, water inlet pipe, regulating valve and circulation valve;Two ends of the circulation pipeline are respectively communicated with the inlet end and outlet end of the test mud pump;The water inlet pipe is communicated with the water inlet point in the circulation pipeline close to the inlet end.Data acquisition subsystem includes: sensor module for collecting the hydraulic performance data of test mud pump and visual sensor for collecting the movement trajectory of silt particles in test mud pump.The system is realized in simulated complex construction environment to carry out mud pump characteristic test measurement.

Description

Technical Field

[0001] This invention relates to the field of dredging engineering technology, and in particular to a mud pump characteristic testing and measurement system that can simulate complex construction environments. Background Technology

[0002] As the heart of a dredger, the hydraulic performance, multiphase flow field characteristics, wear resistance, and cavitation resistance of the mud pump directly affect the dredger's construction efficiency. They are crucial factors determining efficiency and cost in modern dredging projects and are of paramount importance in the research and development of dredging equipment.

[0003] In recent years, as dredgers have developed towards larger and more intelligent designs, the dredging depth of dredgers has been continuously increasing, leading to a greater demand for vacuum in the mud pumps. However, the vacuum provided by the mud pumps inside the hull is very limited, resulting in a significant reduction in the mud concentration drawn into the dredger's pumps, greatly decreasing dredging efficiency. This also causes cavitation in the mud pumps, reducing their service life.

[0004] To improve the mud concentration drawn into the dredger's mud pump, a proposed solution was to move the mud pump outside the hull and install it on the bridge (dredge arm). This would allow the mud pump to be underwater and as close as possible to the suction inlet during construction, thereby maximizing the mud concentration drawn into the dredger. However, when the mud pump is installed on the bridge and placed in the water for construction, the dredger's bridge is subject to significant swaying due to waves and currents. This swaying affects the movement trajectory of mud particles inside the pump, as well as its hydraulic performance, wear resistance, and cavitation performance.

[0005] Currently, research on mud pumps has not considered the impact of complex external construction environment conditions on the characteristics of mud pumps. This will lead to significant performance deviations of mud pumps designed with existing technology when operating in actual complex environmental conditions, thereby affecting the construction efficiency and service life of mud pumps. Summary of the Invention

[0006] This invention provides a mud pump characteristic test and measurement system that can simulate complex construction environments, in order to solve the technical problem that related technologies have not considered the influence of complex external construction environments on mud pump characteristics in mud pump research.

[0007] According to one aspect of the present invention, a mud pump characteristic test and measurement system that can simulate complex construction environments is provided, comprising: a construction environment simulation subsystem, an internal circulation subsystem, a mud injection subsystem, and a data acquisition subsystem;

[0008] The construction environment simulation subsystem is used to drive the test mud pump and the vision sensor in the vertical direction, the axial direction and the lateral direction of the test mud pump;

[0009] The internal circulation subsystem includes: a circulation pipeline, a mud pump drive motor, a test mud pump, an inlet pipe, a regulating valve, and a circulation valve; the two ends of the circulation pipeline are respectively connected to the inlet and outlet of the test mud pump; the inlet pipe is connected to the inlet point in the circulation pipeline near the inlet end;

[0010] The sediment injection subsystem includes: a sediment generation module, a bypass pipeline, a bypass valve connected in series with the bypass pipeline, a sediment injection pipeline, an injection valve connected in series with the sediment injection pipeline, a sediment feeding pipeline connected to the sediment generation module, and a feeding valve connected in series with the sediment feeding pipeline; both ends of the sediment injection pipeline are connected to the output end of the sediment generation module and the injection point of the circulation pipeline, respectively; both ends of the bypass pipeline are connected to the sediment generation module and the bypass point of the circulation pipeline, respectively.

[0011] The regulating valve, the bypass point, the circulation valve, and the injection point are sequentially installed on the pipe section between the water inlet point and the inlet end;

[0012] The data acquisition subsystem includes: a sensor module for acquiring hydraulic performance data of the test mud pump and a visual sensor for acquiring the movement trajectory of mud particles in the test mud pump.

[0013] The technical solution provided in this embodiment has two advantages. First, the construction environment simulation subsystem can drive the test mud pump and the vision sensor to move vertically, axially, and laterally, simulating the complex construction environment of dredging projects. By setting up an internal circulation subsystem, a sediment injection subsystem, and a data acquisition subsystem, it enables mud pump characteristic tests and measurements under simulated complex construction conditions, thereby optimizing mud pump design methods and improving the pump's construction efficiency and service life. Second, because the construction environment simulation subsystem can drive the test mud pump and the vision sensor, the test mud pump and the vision sensor are in a relatively stationary state. This avoids the problem of inaccurate sediment particle movement trajectories captured by the vision sensor due to relative motion between the test mud pump and the vision sensor, thus improving the accuracy of mud pump characteristic test measurements under complex construction conditions.

[0014] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the mud pump characteristic test and measurement system that can simulate complex construction environments provided in this embodiment of the invention;

[0017] Figure 2 This is a schematic diagram of the construction environment simulation subsystem provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the data acquisition subsystem provided in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the test and measurement process of a mud pump characteristic test and measurement system that can simulate complex construction environments;

[0020] Figure 5 This is a schematic diagram of the velocity field and flow field characteristics of a dredger's rake arm-underwater mud pump system under a certain tidal current, obtained through numerical calculations provided in an embodiment of the present invention.

[0021] Figure label:

[0022] 100: Construction environment simulation subsystem; 101: First support platform; 102: Second support platform; 103: Third support platform; 104: Fourth support platform; 105: Hydraulic cylinder; 106: First motor; 107: First lead screw; 108: First bearing platform; 109: First lead screw slider; 110: Second motor; 111: Second bearing platform; 112: Second lead screw slider; 113: First support slide; 114: First slide slider; 115: Second support slide; 116: Second slide slider;

[0023] 201: Circulation pipeline; 2011: Inlet pipe section; 20111: First flexible hose; 2012: Outlet pipe section; 20121: Second flexible hose; 2013: Connecting rigid pipe section; 202: Mud pump drive motor; 203: Test mud pump; 204: Inlet pipe; 205: Regulating valve; 206: Circulation valve; 207: Inlet valve; 208: Exhaust pipe; 209: Flange;

[0024] 300: Sediment Injection Subsystem; 301: Bypass Pipeline; 302: Bypass Valve; 303: Slurry Injection Pipeline; 304: Injection Valve; 305: Sediment Feeding Pipeline; 306: Feeding Valve; 307: Slurry Recovery Pipeline; 308: Recovery Valve; 309: Hopper; 310: Agitator; 311: Overflow Cylinder;

[0025] 401: Vision sensor; 402: Vision sensor bracket; 403: Pump inlet pressure sensor; 404: Pump outlet pressure sensor; 405: Flow meter; 406: Concentration meter; 407: Torque sensor; 408: Accelerometer;

[0026] 500: Control equipment;

[0027] 600: Control cabinet. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the term "comprising" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Figure 1 This is a schematic diagram of the overall structure of the mud pump characteristic test and measurement system that can simulate complex construction environments, provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the data acquisition subsystem provided in an embodiment of the present invention. Please also refer to... Figure 3 The mud pump characteristic test and measurement system provided in this embodiment, which can simulate complex construction environments, includes: a construction environment simulation subsystem 100, an internal circulation subsystem, a mud and sand injection subsystem 300, and a data acquisition subsystem.

[0031] The construction environment simulation subsystem 100 is used to drive the test mud pump 203 and the vision sensor 401 in the vertical direction, the axial direction and the lateral direction of the test mud pump.

[0032] Figure 1 The diagram shows the various directions. In this embodiment, the construction environment simulation subsystem 100 may include transmission elements and / or actuation elements to achieve reciprocating motion in three directions, thereby simulating complex wind, wave, and flow conditions, i.e., simulating the complex construction environment of dredging projects.

[0033] The internal circulation subsystem includes: circulation pipeline 201, mud pump drive motor 202, test mud pump 203, inlet pipe 204, regulating valve 205, and circulation valve 206. The two ends of circulation pipeline 201 are connected to the inlet and outlet ends of test mud pump 203, respectively. Inlet pipe 204 is connected to the inlet point of circulation pipeline 201 near the inlet end.

[0034] In this embodiment, the mud pump drive motor 202 drives the test mud pump 203. The two ends of the circulation pipeline 201 are connected to the inlet and outlet of the test mud pump 203, respectively; that is, one end of the circulation pipeline 201 is connected to the inlet of the test mud pump 203, and the other end is connected to the outlet of the test mud pump 203. Water is supplied to the circulation pipeline 201 and the test mud pump 203 through the water inlet pipe 204. The regulating valve 205 is used to regulate the flow rate, so as to conduct water purification performance tests of the test mud pump 203 under different flow conditions. In this embodiment, the circulation valve 206 is used to block the circulation of clean water in the circulation pipeline 201, so that mud slurry is injected into the circulation pipeline 201 and the test mud pump 203 through the mud injection subsystem.

[0035] The sediment injection subsystem includes: a sediment generation module, a bypass pipeline 301, a bypass valve 302 connected in series with the bypass pipeline 301, a sediment injection pipeline 303, an injection valve 304 connected in series with the sediment injection pipeline 303, a sediment feeding pipeline 305 connected to the sediment generation module, and a feeding valve 306 connected in series with the sediment feeding pipeline 305. The two ends of the sediment injection pipeline 303 are connected to the output end of the sediment generation module and the injection point of the circulation pipeline 201, respectively. The two ends of the bypass pipeline 301 are connected to the bypass point of the sediment generation module and the bypass point of the circulation pipeline 201, respectively.

[0036] A regulating valve 205, a bypass point, a circulation valve 206, and an injection point are sequentially installed on the pipe section between the water inlet and the inlet end. This arrangement is to ensure that the mud generated by the mud generation module can successfully enter the pipe circulation subsystem.

[0037] The bypass pipe 301 is used to supply water or mud to the mud generation module. The mud generation module mixes water and sand to obtain mud, and then supplies the mud to the mud injection pipe 303 through its output end. The two ends of the mud injection pipe 303 are connected to the output end of the mud generation module and the injection point of the circulation pipe 201, respectively. Specifically, one end of the mud injection pipe 303 is connected to the output end of the mud generation module, and the other end is connected to the injection point of the circulation pipe 201. The sand and gravel feeding pipe 305 is used to supply sand and gravel to the mud generation module.

[0038] The data acquisition subsystem includes: a sensor module for acquiring hydraulic performance data of the test mud pump and a visual sensor 401 for acquiring the movement trajectory of mud particles in the test mud pump.

[0039] Optionally, the sensor module in this embodiment may include a pressure sensor, a flow meter, and a concentration meter, etc., disposed on the circulation pipeline 201.

[0040] Optionally, the visual sensor 401 in this embodiment can be a high-speed camera.

[0041] In this embodiment, the data acquisition subsystem is used to collect hydraulic performance data of the test mud pump and the movement trajectory of mud and sand particles in the test mud pump.

[0042] Based on the mud pump characteristic test and measurement system provided in this embodiment, which can simulate complex construction environments, the process for testing and measuring mud pump characteristics is as follows.

[0043] Step 1: Turn on the sensing device and zero it. Connect the sensor module and vision sensor to the data acquisition device, set the data acquisition parameters, and connect the data acquisition device to the host computer to ensure that the data can be displayed and stored in real time.

[0044] Step 2: Open circulation valve 206, adjust valve 205, and close bypass valve 302, injection valve 304 and feed valve 306.

[0045] Step 3: Start the test mud pump 203 to the required speed and fill the circulation pipeline 201 with water through the water inlet pipe 204.

[0046] Step 4: Control the construction environment simulation subsystem in the vertical direction, the axial direction of the test mud pump 203, and the lateral movement to simulate a complex construction environment.

[0047] Step 5: After the construction environment simulation subsystem is started, the flow rate is adjusted by regulating valve 205 to conduct water purification performance tests on the test mud pump 203 under different flow conditions. During the test, the first hydraulic performance data collected by the sensor module is monitored and recorded.

[0048] Step 6: After the water performance test is completed, close the circulation valve 206 and open the bypass valve 302, injection valve 304, and feed valve 306. Maintain the test measurement system at the specified flow rate and add sand and gravel to the slurry generation module through the sand and gravel feeding pipeline 305. Optionally, the sand and gravel in this embodiment can be glass microspheres. After the circulation valve 206 is closed, the water in the circulation pipeline 201 enters the slurry generation module through the bypass pipeline 301. The slurry generation module mixes the sand and gravel with the water to obtain slurry. The slurry is fed into the circulation pipeline 201 and the test mud pump 203 through the slurry injection pipeline 303.

[0049] Step 7: After the test conditions stabilize, turn on the vision sensor 401 to photograph the flow field of the sand-water mixture in the test mud pump 203, and at the same time monitor and record the second hydraulic performance data collected by the sensor module.

[0050] Step 8: Based on the silt particle movement trajectory, first hydraulic performance data, and second hydraulic performance data collected by the vision sensor 401, analyze the impact of complex construction environment conditions on the hydraulic performance of the test mud pump 203 and the silt movement trajectory inside the pump, and explore the characteristics of the mud pump under complex construction environment conditions.

[0051] This embodiment provides an experimental measurement system that can study the trajectory and hydraulic performance of mud particles inside a dredger's mud pump under complex construction environments, optimize existing mud pump design methods, and make the designed mud pump more suitable for actual construction environments, thereby improving the construction efficiency and service life of the mud pump.

[0052] The mud pump characteristic testing and measurement system provided in this embodiment, capable of simulating complex construction environments, achieves several advantages. Firstly, the construction environment simulation subsystem enables the test mud pump and vision sensor to move vertically, axially, and laterally, simulating the complex construction environment of dredging projects. By incorporating an internal circulation subsystem, a sediment injection subsystem, and a data acquisition subsystem, mud pump characteristic testing and measurement can be conducted under this simulated environment, thereby optimizing mud pump design methods and improving construction efficiency and service life. Secondly, the construction environment simulation subsystem's ability to drive both the test mud pump and vision sensor ensures a relatively stationary relationship between them. This avoids the inaccurate trajectories of sediment particles captured by the vision sensor due to relative motion between the two, thus improving the accuracy of mud pump characteristic testing and measurement under complex construction environments.

[0053] Figure 2 This is a structural schematic diagram of the construction environment simulation subsystem provided in an embodiment of the present invention. Please also refer to... Figure 1 , Figure 2 as well as Figure 3The construction environment simulation subsystem in this embodiment includes: a first support platform 101, a second support platform 102, a third support platform 103, and a fourth support platform 104 arranged sequentially along the vertical direction. A first motion module is disposed between the first support platform 101 and the second support platform 102; a second motion module is disposed between the second support platform 102 and the third support platform 103; and a third motion module is disposed between the third support platform 103 and the fourth support platform 104.

[0054] The first motion module is used to drive the second support platform 102 to move vertically; the second motion module is used to drive the third support platform 103 to move laterally along the test mud pump 203; and the third motion module is used to drive the fourth support platform 104 to move axially along the test mud pump 203.

[0055] The test mud pump 203, the mud pump drive motor 202, and the vision sensor 401 are fixedly mounted on the surface of the fourth support platform 104 away from the third support platform 103.

[0056] The surface of the fourth support platform 104 that is away from the third support platform 103 can also be referred to as the upper surface of the fourth support platform 104. Optionally, in this embodiment, the vision sensor 401 can be mounted on the upper surface of the fourth support platform 104 via a vision sensor bracket 402.

[0057] In this implementation, since the first support platform 101, the second support platform 102, the third support platform 103, and the fourth support platform 104 are arranged vertically, they occupy less space. Furthermore, since the second support platform 102, the third support platform 103, and the fourth support platform 104 move in different directions, the implementation is simple and has low complexity.

[0058] Alternatively, please continue to refer to Figure 2 In this embodiment, the first motion module includes a hydraulic cylinder 105. The cylinder body of the hydraulic cylinder 105 is fixedly mounted on the first support platform 101, and the piston rod of the hydraulic cylinder 105 is fixedly mounted on the surface of the second support platform 102 near the first support platform 101. The piston rod of the hydraulic cylinder 105 is used to drive the second support platform 102 to move vertically under the control of the control device.

[0059] In this embodiment, the surface of the second support platform 102 that is close to the first support platform 101 can also be referred to as the lower surface of the second support platform.

[0060] Optionally, in this embodiment, there may be multiple hydraulic cylinders 105, which are evenly distributed between the first support platform and the second support platform to ensure balance. Figure 2The example describes four hydraulic cylinders 105. Each hydraulic cylinder is connected to a control device 500. Optionally, each hydraulic cylinder can be connected to the control device 500 via a control cabinet 600.

[0061] During the experiment, the reciprocating motion of the construction environment simulation subsystem in the vertical direction was achieved by controlling the extension and retraction of the piston rod of the hydraulic cylinder 105, which was used to simulate the vibration characteristics of the mud pump system caused by vertical force.

[0062] Alternatively, please continue to refer to Figure 2 The second motion module includes: a first motor 106, a first lead screw 107, a first bearing platform 108, and a first lead screw slider 109.

[0063] The axial direction of the first lead screw 107 is parallel to the transverse direction of the test mud pump. One end of the first lead screw 107 is connected to the first motor 106, and the other end of the first lead screw 107 is connected to the first bearing platform 108, and the first lead screw 107 passes through the first lead screw slider 109.

[0064] The first motor 106 and the first bearing platform 108 are fixedly mounted on the surface of the second support platform 102 away from the first support platform 101. The first lead screw slider 109 is fixedly mounted on the surface of the third support platform 103 close to the second support platform 102.

[0065] The first motor 106 drives the first lead screw 107 to rotate. During the rotation, the first lead screw 107 drives the first lead screw slider 109 to reciprocate along the axial direction of the first lead screw 107. The first lead screw slider 109 drives the third support platform 103 to move laterally along the test mud pump. This realizes the reciprocating motion of the construction environment simulation subsystem in the lateral direction, which is used to simulate the vibration characteristics of the mud pump system caused by lateral forces.

[0066] Optionally, in this embodiment, the first motor and the first bearing platform can be located at the middle position on the surface of the second support platform away from the first support platform.

[0067] In this embodiment, the first bearing platform 108 is provided to support the first lead screw 107 and maintain its balance. The surface of the second support platform 102 away from the first support platform 101 refers to the upper surface of the second support platform. The surface of the third support platform 103 close to the second support platform 102 refers to the lower surface of the third support platform.

[0068] In this embodiment, the first motor 106 is connected to the control device 500 through the control cabinet 600 and is used to drive the first lead screw 107 to rotate under the control of the control device 500.

[0069] Alternatively, please continue to refer to Figure 2The third motion module includes: a second motor 110, a second lead screw (not shown in the figure due to angle issues), a second bearing platform 111, and a second lead screw slider 112.

[0070] The axis of the second lead screw is parallel to the axis of the test mud pump. One end of the second lead screw is connected to the second motor 110, and the other end of the second lead screw is connected to the second bearing platform 111, and the second lead screw passes through the second lead screw slider 112.

[0071] The second motor 110 and the second bearing platform 111 are fixedly mounted on the surface of the third support platform 103 away from the second support platform 102. The second lead screw slider 112 is fixedly mounted on the surface of the fourth support platform 104 near the third support platform 103.

[0072] The second motor 110 drives the second lead screw to rotate. During the rotation, the second lead screw drives the second lead screw slider 112 to reciprocate along the axis of the second lead screw. The second lead screw slider 112 drives the fourth support platform 104 to move along the axis of the test mud pump. This realizes the reciprocating motion of the construction environment simulation subsystem in the axial direction, which is used to simulate the vibration characteristics of the mud pump system under axial force.

[0073] In this embodiment, the second bearing platform 111 is provided to support the second lead screw and maintain its balance. The surface of the third support platform 103 furthest from the second support platform 102 refers to the upper surface of the third support platform. The surface of the fourth support platform 104 closest to the third support platform 103 refers to the lower surface of the fourth support platform.

[0074] In this embodiment, the second motor 110 is connected to the control device 500 through the control cabinet 600 and is used to drive the second lead screw to rotate under the control of the control device 500.

[0075] Optionally, both the first motor and the second motor in this embodiment can be servo motors.

[0076] Compared to the method of using hydraulic cylinders to achieve all motion, the implementation of the first, second, and third motion modules mentioned above reduces costs by saving energy and reducing maintenance, while ensuring that the construction environment simulation subsystem can move in three directions.

[0077] Further, please continue to refer to Figure 2The second motion module further includes at least two first support components. The at least two first support components are symmetrically arranged on both sides of the first lead screw 107. Each first support component includes a first support slide 113 and a first slide slider 114. The first support slide 113 is fixedly disposed on the surface of the second support platform 102 away from the first support platform 101. The first slide slider 114 is fixedly disposed on the surface of the third support platform 103 near the second support platform 102. During the rotation of the first lead screw 107, the first slide slider 114 slides laterally along the test mud pump on the first support slide 113.

[0078] Figure 2 The second motion module also includes two first support components as an example. These two first support components are symmetrically arranged on both sides of the first lead screw 107. The purpose of setting the first support components is to ensure the balance of the third support platform 103, avoid the third support platform 103 from becoming unbalanced during movement, and improve the reliability of the construction environment simulation subsystem.

[0079] Further, please continue to refer to Figure 2 The third motion module further includes at least two second support components. The at least two second support components are symmetrically arranged on both sides of the second lead screw. Each second support component includes a second support slide 115 and a second slide block 116.

[0080] The second support slide 115 is fixedly mounted on the surface of the third support platform 103 away from the second support platform 102. The second slide slider 116 is fixedly mounted on the surface of the fourth support platform 104 near the third support platform 103. During the rotation of the second lead screw, the second slide slider 116 slides along the axial direction of the test mud pump on the second support slide 115.

[0081] Figure 2 The third motion module also includes two second support components, which are illustrated below. These two second support components are symmetrically arranged on both sides of the second lead screw. The purpose of setting up the second support components is to ensure the balance of the fourth support platform 104, prevent the fourth support platform 104 from becoming unbalanced during movement, and improve the reliability of the construction environment simulation subsystem.

[0082] Please continue to refer to Figure 1 In this embodiment, the circulation pipeline 201 includes an inlet pipe section 2011, an outlet pipe section 2012, and a connecting rigid pipe section 2013. The inlet pipe section 2011 is arranged horizontally, and the outlet pipe section 2012 is arranged vertically. The inlet pipe section 2011 includes a first flexible hose 20111 and an inlet rigid pipe. The outlet pipe section 2012 includes a second flexible hose 20121 and an outlet rigid pipe.

[0083] One end of the inlet pipe section 2011 is connected to the inlet end of the test mud pump 203, and the other end of the inlet pipe section 2011 is connected to one end of the connecting rigid pipe section 2013. One end of the outlet pipe section 2012 is connected to the outlet end of the test mud pump 203, and the other end of the outlet pipe section 2012 is connected to the other end of the connecting rigid pipe section 2013.

[0084] The purpose of setting the first hose 20111 and the second hose 20121 in this embodiment is to compensate for relative motion and absorb vibration and impact during the motion of the simulated subsystem in the construction environment, so as to improve the reliability and safety of the internal circulation subsystem.

[0085] In this embodiment, the first flexible hose 20111 is connected to the inlet rigid pipe via a flange. The second flexible hose 20121 and the outlet rigid pipe are connected via a flange 209.

[0086] Please refer to the following at the same time Figure 1 as well as Figure 3 The sensor module includes: a pump inlet pressure sensor 403 connected in series in the inlet pipe section 2011, a pump outlet pressure sensor 404, a flow meter 405, and a concentration meter 406 connected in series in the outlet pipe section 2012, a torque sensor 407, and an acceleration sensor 408.

[0087] Flow meter 405 is used to measure the flow rate through test mud pump 203. Concentration meter 406 is used to measure the mud concentration in circulation pipeline 201.

[0088] Both the torque sensor 407 and the acceleration sensor 408 are mounted on the drive shaft connecting the mud pump drive motor 202 and the test mud pump 203. The torque sensor 407 is used to measure the torque of the mud pump drive motor 202. The acceleration sensor 408 is used to measure the vibration of the drive shaft.

[0089] In this embodiment, the mud pump drive motor 202 drives the test mud pump 203 via a shaft system. The pump inlet pressure sensor 403 is used to measure the pressure at the inlet of the test mud pump 203. The pump outlet pressure sensor 404 is used to measure the pressure at the outlet of the test mud pump 203.

[0090] Please continue to refer to Figure 1 The sediment injection subsystem 300 also includes a mud recovery pipeline 307 and a recovery valve 308 connected in series with the mud recovery pipeline 307. The mud recovery pipeline 307 is used to recover the mud in the sediment injection subsystem 300 after the test.

[0091] The mud generation module includes a silo 309, a mixer 310 installed in the silo 309, and an overflow cylinder 311. The first end of the overflow cylinder 311 is located in the silo 309, and the second end extends out of the bottom of the silo 309. The second end of the overflow cylinder 311 is connected to one end of the mud injection pipe 303 and the mud recovery pipe 307. The mud and sand feeding pipe 305 is connected to the silo 309. One end of the bypass pipe 301 is connected to the silo 309. The mixer 310 is used to mix the water and sand in the silo 309 to obtain mud, which flows out along the second end of the overflow cylinder 311.

[0092] The volume of mud and sand during the test is controlled by the lifting and lowering of the overflow cylinder 311 within the silo 309. The second end of the overflow cylinder 311 is connected to one end of the mud injection pipeline 303 and the mud recovery pipeline 307 via a tee.

[0093] The internal circulation subsystem also includes an inlet valve 207 installed in the inlet pipe and an exhaust pipe 208 connected to the circulation pipeline 201. The purpose of the exhaust pipe is to discharge the gas in the circulation pipeline 201 during the test.

[0094] Figure 4 This is a schematic diagram of the test and measurement process for a mud pump characteristic test and measurement system that can simulate complex construction environments. (Example) Figure 4 As shown, the experimental measurement process includes the following steps.

[0095] Step 701: Turn on the sensing device and zero it. Connect the sensor module and vision sensor to the data acquisition instrument, set the data acquisition parameters, and connect the data acquisition instrument to the host computer to ensure that the data can be displayed and stored in real time.

[0096] Step 702: Open the circulation valve 206, regulating valve 205, and water inlet valve 207, and close the bypass valve 302, injection valve 304, feeding valve 306, and recovery valve 308.

[0097] Step 703: Start the test mud pump 203 to the required speed and fill the circulation pipeline 201 with water through the water inlet pipe 204.

[0098] Optionally, after a preset water filling time, for example, 10 minutes, the water can be vented through the vent pipe 208.

[0099] Step 704: In response to the complex construction environment conditions, the vibration parameters of the underwater mud pump system on the bridge under the construction environment conditions such as wind, waves and currents obtained by numerical calculation are input into the control device 500. The control device 500 starts the construction environment simulation subsystem 100 through the control cabinet 600.

[0100] Step 705: After the construction environment simulation subsystem is started, the flow rate is adjusted by regulating valve 205 to conduct a water clearing performance test of the test mud pump 203 under different flow conditions. During the test, the first set of test data collected by the pump inlet pressure sensor 403, pump outlet pressure sensor 404, flow meter 405, torque sensor 407, and acceleration sensor 408 is monitored and recorded.

[0101] Optionally, the first set of test data includes the first set of hydraulic performance data.

[0102] Step 706: After the water performance test is completed, close the circulation valve 206 and open the bypass valve 302, injection valve 304, and feed valve 306. Maintain the test measurement system at a specified flow rate and add sand and gravel to the silo 309 through the sediment feed pipeline 305. Start the agitator 310 to stir the sand and gravel and water in the silo 309 to mix them evenly. Adjust the height of the overflow cylinder 311 according to the operating conditions to control the concentration of the sand-water mixture during the test.

[0103] After the circulation valve 206 is closed, the water in the circulation pipeline 201 enters the silo 309 through the bypass pipeline 301. The mud is fed into the circulation pipeline 201 and the test mud pump 203 through the overflow cylinder 311 and the mud injection pipeline 303.

[0104] Optionally, the sand in this embodiment can be glass microspheres.

[0105] Step 707: After the test conditions stabilize, turn on the vision sensor 401 to photograph the flow field of the sand-water mixture in the test mud pump 203, and at the same time monitor and record the second set of test data collected by the pump inlet pressure sensor 403, pump outlet pressure sensor 404, flow meter 405, torque sensor 407 and acceleration sensor 408.

[0106] Optionally, the second set of test data includes second hydraulic performance data.

[0107] It should be noted that between steps 706 and 707, the control device 500 controls the construction environment simulation subsystem 100 in the vertical direction, the axial direction of the test mud pump, and the lateral movement through the control cabinet 600.

[0108] After the test, the recovery valve 308 is opened and the mud is discharged through the mud recovery pipeline 307.

[0109] Step 708: Based on the trajectories of mud and sand particles collected by the vision sensor 401, the first set of experimental data, and the second set of experimental data, analyze the influence of complex construction environment conditions on the hydraulic performance of the test mud pump 203 and the trajectories of mud and sand movement within the pump, and explore the characteristics of the mud pump under complex construction environment conditions.

[0110] The mud pump characteristic test and measurement system provided in this embodiment, which can simulate complex construction environments, can also be used for routine mud pump test and measurement. The routine mud pump test process based on this test system includes the following steps.

[0111] Step 801: Turn on the sensing device and zero it. Connect the sensor module and vision sensor to the data acquisition instrument, set the data acquisition parameters, and connect the data acquisition instrument to the host computer to ensure that the data can be displayed and stored in real time.

[0112] Step 802: Open the circulation valve 206, regulating valve 205, and water inlet valve 207, and close the bypass valve 302, injection valve 304, feeding valve 306, and recovery valve 308.

[0113] Step 803: Start the test mud pump 203 to the required speed and fill the circulation pipeline 201 with water through the water inlet pipe 204.

[0114] Optionally, after a preset water filling time, for example, 10 minutes, the water can be vented through the vent pipe 208.

[0115] Step 804: Flow rate is adjusted by regulating valve 205, and the water purification performance of the test mud pump 203 is tested under different flow conditions. During the test, the first set of test data collected by the pump inlet pressure sensor 403, pump outlet pressure sensor 404, flow meter 405, torque sensor 407, and acceleration sensor 408 is monitored and recorded.

[0116] Optionally, the first set of test data includes the first set of hydraulic performance data.

[0117] Step 805: After the water performance test is completed, close the circulation valve 206 and open the bypass valve 302, injection valve 304, and feed valve 306. Maintain the test measurement system at a specified flow rate and add sand and gravel to the silo 309 through the sediment feed pipeline 305. Start the agitator 310 to stir the sand and gravel and water in the silo 309 to mix them evenly. Adjust the height of the overflow cylinder 311 according to the working condition settings to control the concentration of the sand-water mixture during the test.

[0118] After the circulation valve 206 is closed, the water in the circulation pipeline 201 enters the silo 309 through the bypass pipeline 301. The mud is fed into the circulation pipeline 201 and the test mud pump 203 through the overflow cylinder 311 and the mud injection pipeline 303.

[0119] Optionally, the sand in this embodiment can be glass microspheres.

[0120] Step 806: After the test conditions stabilize, turn on the vision sensor 401 to photograph the flow field of the sand-water mixture in the test mud pump 203, and at the same time monitor and record the second set of test data collected by the pump inlet pressure sensor 403, pump outlet pressure sensor 404, flow meter 405, torque sensor 407 and acceleration sensor 408.

[0121] Optionally, the second set of test data includes second hydraulic performance data.

[0122] After the test, the recovery valve 308 is opened and the mud is discharged through the mud recovery pipeline 307.

[0123] Step 807: Based on the trajectories of sediment particles collected by the vision sensor 401, the first set of experimental data, and the second set of experimental data, analyze the hydraulic performance of the test mud pump 203 and the influence of the trajectories of sediment movement within the pump, and analyze the laws governing sediment movement.

[0124] The mud pump characteristic test and measurement system provided in this embodiment, which can simulate complex construction environments, can not only realize the test and measurement of mud pump characteristics under conventional conditions, but also realize the test and measurement of hydraulic performance and multiphase flow field characteristics of underwater mud pumps under complex wind, wave and flow conditions by simulating vertical, axial and lateral reciprocating motion through the construction environment simulation subsystem. This optimizes mud pump design methods and improves mud pump construction efficiency.

[0125] Optionally, before conducting tests and measurements on the mud pump using the mud pump characteristic test and measurement system provided in this embodiment, which can simulate complex construction environments, a numerical calculation step is also included.

[0126] Optionally, the numerical calculation step can be implemented using a control device. The system also includes a control device.

[0127] The control equipment can select a typical dredging vessel bridge and underwater mud pump system to establish a numerical calculation model, and use numerical calculation methods to analyze the stress and vibration characteristics of the bridge-underwater mud pump system under wind, wave, and current conditions. Specifically, the control equipment determines the stress and vibration characteristics through the following steps.

[0128] Step 901: Determine the vibration amplitude and frequency of the test mud pump based on the lowering angle of the bridge and underwater mud pump system, wind, wave and current information, and numerical calculation model.

[0129] Optionally, the numerical calculation model in this embodiment can be a three-dimensional numerical calculation domain model.

[0130] For a typical dredger bridge (drag arm) - underwater mud pump system construction condition, the lowering angle of the bridge (drag arm) - underwater mud pump system is determined, and a three-dimensional numerical calculation model of the dredger bridge (drag arm) - underwater mud pump system is established. In this embodiment, the lowering angle refers to the angle between the mud pump connecting rod and the horizontal plane.

[0131] During the numerical calculation, the left side of the numerical calculation domain is set as the inlet boundary. The inlet is given wind, wave and flow information according to the working conditions, and the outlet is set as free outflow. The force and vibration data of the dredger bridge (rake arm) - underwater mud pump system are monitored and stored in real time during the numerical calculation.

[0132] After the numerical calculations are completed, the results are processed to analyze the flow field information, such as velocity field and vorticity field, of the dredger bridge (rake arm) - underwater mud pump system. Figure 5 This is a schematic diagram of the velocity and flow field characteristics of a dredger's hook arm-underwater mud pump system under a certain tidal current, obtained through numerical calculations provided in an embodiment of the present invention. Figure 5 As shown, this illustrates the velocity field and other flow field information of the dredger's bridge (drag arm) - underwater mud pump system. Subsequently, the Fourier transform method was used to process the force and vibration data of the dredger's bridge (drag arm) - underwater mud pump system, analyzing vibration parameters such as vibration frequency and amplitude to obtain the vibration characteristics of the dredger's bridge (drag arm) - underwater mud pump system under wind, wave, and current conditions, as shown in the following equation: In the formula, S is the vibration displacement, A is the vibration amplitude, f is the vibration frequency, and t is the time.

[0133] Step 902: Determine the vertical displacement, axial position, and lateral displacement of the construction environment simulation subsystem based on the vibration amplitude and vibration frequency.

[0134] During the experiment, the movement of the construction environment simulation subsystem was controlled based on its vertical displacement, axial position, and lateral displacement.

[0135] Optionally, the control device provided in this embodiment may further include a processor and a memory. The memory may be a read-only memory (ROM), a random access memory (RAM), etc. The control device may also include input units, such as a keyboard, a mouse, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as disks, optical disks, etc.; and communication units, such as network interface cards (NICs), modems, wireless transceivers, etc. The communication unit allows the control device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0136] The processor can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Examples of processors include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. In this embodiment, the processor can be connected to electrically controlled devices such as motors in the control equipment to control these devices. Exemplarily, these electrically controlled devices include: Z-axis motors, Y-axis motors, feed motors, elevators, and second robotic arms, etc. In this embodiment, the processor can send control commands to each electrically controlled device. These control commands can characterize the direction and position of movement of the electrically controlled device, etc.

[0137] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0138] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A mud pump characteristic testing and measurement system capable of simulating complex construction environments, characterized in that, include: The system includes a construction environment simulation subsystem, an internal pipe circulation subsystem, a sediment injection subsystem, and a data acquisition subsystem. The construction environment simulation subsystem is used to drive the test mud pump and the vision sensor in the vertical direction, the axial direction and the lateral direction of the test mud pump; The internal circulation subsystem includes: a circulation pipeline, a mud pump drive motor, a test mud pump, an inlet pipe, a regulating valve, and a circulation valve; the two ends of the circulation pipeline are respectively connected to the inlet and outlet of the test mud pump; the inlet pipe is connected to the inlet point in the circulation pipeline near the inlet end; The sediment injection subsystem includes: a sediment generation module, a bypass pipeline, a bypass valve connected in series with the bypass pipeline, a sediment injection pipeline, an injection valve connected in series with the sediment injection pipeline, a sediment feeding pipeline connected to the sediment generation module, and a feeding valve connected in series with the sediment feeding pipeline; both ends of the sediment injection pipeline are connected to the output end of the sediment generation module and the injection point of the circulation pipeline, respectively; both ends of the bypass pipeline are connected to the sediment generation module and the bypass point of the circulation pipeline, respectively. The regulating valve, the bypass point, the circulation valve, and the injection point are sequentially installed on the pipe section between the water inlet point and the inlet end; The data acquisition subsystem includes: a sensor module for acquiring hydraulic performance data of the test mud pump and a visual sensor for acquiring the movement trajectory of mud particles in the test mud pump; The construction environment simulation subsystem includes: a first support platform, a second support platform, a third support platform, and a fourth support platform arranged in sequence along the vertical direction; a first motion module disposed between the first support platform and the second support platform; a second motion module disposed between the second support platform and the third support platform; and a third motion module disposed between the third support platform and the fourth support platform. The first motion module is used to drive the second support platform to move vertically; the second motion module is used to drive the third support platform to move laterally along the test mud pump; the third motion module is used to drive the fourth support platform to move axially along the test mud pump. The test mud pump, the mud pump drive motor, and the vision sensor are fixedly mounted on the surface of the fourth support platform away from the third support platform. The circulation pipeline includes an inlet pipe section and an outlet pipe section; the inlet pipe section is arranged horizontally, and the outlet pipe section is arranged vertically; the inlet pipe section includes a first flexible hose, and the outlet pipe section includes a second flexible hose.

2. The system according to claim 1, characterized in that, The first motion module includes a hydraulic cylinder; The cylinder body of the hydraulic cylinder is fixedly mounted on the first support platform, and the piston rod of the hydraulic cylinder is fixedly mounted on the surface of the second support platform near the first support platform. The piston rod of the hydraulic cylinder is used to drive the second support platform to move in the vertical direction under the control of the control device.

3. The system according to claim 1, characterized in that, The second motion module includes: a first motor, a first lead screw, a first bearing platform, and a first lead screw slider; The axial direction of the first lead screw is parallel to the transverse direction of the test mud pump; one end of the first lead screw is connected to the first motor, the other end of the first lead screw is connected to the first bearing platform, and the first lead screw passes through the first lead screw slider. The first motor and the first bearing platform are fixedly mounted on the surface of the second support platform away from the first support platform; the first lead screw slider is fixedly mounted on the surface of the third support platform close to the second support platform. The first motor is used to drive the first lead screw to rotate. During the rotation, the first lead screw drives the first lead screw slider to reciprocate along the axis of the first lead screw. The first lead screw slider drives the third support platform to move laterally along the test mud pump.

4. The system according to claim 3, characterized in that, The third motion module includes: a second motor, a second lead screw, a second bearing platform, and a second lead screw slider; The axis of the second lead screw is parallel to the axis of the test mud pump; one end of the second lead screw is connected to the second motor, the other end of the second lead screw is connected to the second bearing platform, and the second lead screw passes through the second lead screw slider; The second motor and the second bearing platform are fixedly mounted on the surface of the third support platform away from the second support platform; the second lead screw slider is fixedly mounted on the surface of the fourth support platform close to the third support platform. The second motor is used to drive the second lead screw to rotate. During the rotation, the second lead screw drives the second lead screw slider to reciprocate along the axis of the second lead screw. The second lead screw slider drives the fourth support platform to move along the axis of the test mud pump.

5. The system according to claim 4, characterized in that, The second motion module further includes: at least two first support components; the at least two first support components are symmetrically arranged on both sides of the first lead screw; the first support component includes: a first support slide and a first slide slider; the first support slide is fixedly disposed on the surface of the second support platform away from the first support platform, and the first slide slider is fixedly disposed on the surface of the third support platform close to the second support platform; during the rotation of the first lead screw, the first slide slider slides laterally along the test mud pump on the first support slide; The third motion module further includes: at least two second support components; the at least two second support components are symmetrically arranged on both sides of the second lead screw; the second support component includes: a second support slide and a second slide slider; The second support slide is fixedly mounted on the surface of the third support platform away from the second support platform, and the second slide slider is fixedly mounted on the surface of the fourth support platform close to the third support platform; during the rotation of the second lead screw, the second slide slider slides along the axial direction of the test mud pump on the second support slide.

6. The system according to any one of claims 1 to 5, characterized in that, The circulation pipeline further includes: a connecting rigid pipe section; the inlet pipe section further includes an inlet rigid pipe, and the outlet pipe section further includes an outlet rigid pipe; One end of the inlet pipe section is connected to the inlet end of the test mud pump, and the other end of the inlet pipe section is connected to one end of the connecting rigid pipe section; one end of the outlet pipe section is connected to the outlet end of the test mud pump, and the other end of the outlet pipe section is connected to the other end of the connecting rigid pipe section.

7. The system according to claim 6, characterized in that, The sensor module includes: a pump inlet pressure sensor connected in series with the inlet pipe section, a pump outlet pressure sensor, a flow meter, a concentration meter, a torque sensor, and an acceleration sensor connected in series with the outlet pipe section. The flow meter is used to measure the flow rate through the test mud pump; the concentration meter is used to measure the mud concentration in the circulation pipeline; Both the torque sensor and the acceleration sensor are mounted on the drive shaft connecting the mud pump drive motor and the test mud pump. The torque sensor is used to measure the torque of the mud pump drive motor, and the acceleration sensor is used to measure the vibration of the drive shaft.

8. The system according to claim 1, characterized in that, The sediment injection subsystem also includes a mud recovery pipeline and a recovery valve connected in series with the mud recovery pipeline; The mud generation module includes: a silo, a mixer installed in the silo, and an overflow cylinder; the first end of the overflow cylinder is located in the silo, and the second end of the overflow cylinder extends out of the bottom of the silo, the second end of the overflow cylinder being connected to one end of the mud injection pipeline and the mud recovery pipeline respectively; the mud and sand feeding pipeline is connected to the silo; one end of the bypass pipeline is connected to the silo; the mixer is used to mix the water and sand in the silo to obtain mud, and the mud flows out along the second end of the overflow cylinder; The pipe circulation subsystem also includes an inlet valve installed in the inlet pipe and an exhaust pipe connected to the circulation pipeline.

9. The system according to claim 1, characterized in that, The system also includes control equipment; The control equipment is used to: determine the vibration amplitude and vibration frequency of the test mud pump based on the lowering angle of the bridge and underwater mud pump system, wind, wave and current information, and numerical calculation model; determine the vertical displacement, axial position, and lateral displacement of the construction environment simulation subsystem based on the vibration amplitude and vibration frequency; and control the movement of the construction environment simulation subsystem during the test based on the vertical displacement, axial position, and lateral displacement of the construction environment simulation subsystem.

Images