Water outlet channel member for water flow scouring test

Abstract

The application discloses a water outlet groove component for water flow scouring test, and the water outlet groove component is arranged in an inclined mode and is connected with a first water tank water outlet in an inclined upper mode; a test piece mounting groove is arranged on the groove bottom surface of the lower part of the water outlet groove component; and the water outlet groove component is characterized in that an obstacle simulation device is further arranged in the water outlet groove component and located close to the upper side of the test piece mounting groove; the obstacle simulation device comprises an obstacle simulation module; and the obstacle simulation module is mounted and fixed on the groove walls on the two sides of the water outlet groove component through connecting supports arranged at the two ends of the obstacle simulation module. The application can simulate the test of the impact of water flow crossing an obstacle on the position of the front water bottom, test the scouring influence effect, and better improve the application range of the test device.

Description

[0001] This application is a divisional application of the patent application No. 202111427802.7, filed on 2021-11-29 entitled "An experimental method for simulating the scouring effect of water flow on rock specimens". Technical Field

[0002] This invention relates to the field of water flow scour research technology, and specifically to a water outlet tank component for water flow scour experiments. Background Technology

[0003] The scouring and erosion effects of water flow are often the cause of riverbed formation and course changes in rivers and streams. River water not only has a significant scouring effect on soil-based riverbeds, but it also has a substantial erosive effect on some softer rocks, such as sandstone and limestone. Therefore, water flow scouring tests are necessary to study the scouring and erosion effects of water flow on rocks. Furthermore, in some artificial water conservancy projects, such as ditches and spillways, it is also necessary to conduct water flow scouring tests to study the effects of water flow scouring and erosion, providing a theoretical basis for construction guidance.

[0004] Existing water flow erosion testing methods or devices typically employ high-pressure water flow to scour the test specimen. Examples include a test method for the erosion resistance of road materials disclosed in CN201110042067.8, a test device for simulating the erosion efficiency of soil by high-pressure water flow disclosed in CN201521070987.0, a method for directional erosion testing of interlayer structures in cement concrete pavement disclosed in CN201510503938.X, and a physical model test method for local erosion of parallel bridge piers disclosed in CN201911413463.X. These methods, which are typically highly targeted erosion strength tests for specific test objects, cannot be applied to broader erosion testing studies of rivers, streams, or canals.

[0005] CN201510692192.1 discloses a device for simulating the scouring and weathering effects of water flow on rocks, comprising a control chamber and a test chamber. One end of the control chamber is in contact with one end of the test chamber. The test chamber contains a scouring chamber. The control chamber contains a booster pump, a water heater, and a blower. One end of the scouring chamber is connected to a first pipe located within the control chamber. The first pipe has at least two branches, one of which connects to the booster pump, and the other branch connects to the blower. The other end of the scouring chamber is connected to the first pipe via a second pipe. The water heater is located within the first pipe, and the second pipe connects the first pipe to the other end of the scouring chamber. This invention can comprehensively consider the influence of the interaction of factors such as water flow velocity, water temperature, different wind speeds, and wind speeds at different temperatures on rock samples.

[0006] While the aforementioned patent can be broadly applied to the study of rock erosion resistance, the water flow in this patent is controlled within a pipe to scour the specimen. Constrained by the pipe's shape and accelerated by the booster pump, the water flow is significantly affected by non-natural factors, making it difficult to effectively simulate the water flow conditions in natural environments such as rivers, streams, or ditches. Summary of the Invention

[0007] To address the shortcomings of the existing technology, the technical problem this invention aims to solve is: how to provide a test method for simulating the scouring effect of natural water flow on rock specimens, enabling a better study of the scouring effect of water on the test specimen under natural flow conditions, and thus having broader applicability. This invention also provides a water outlet trough component for water scouring tests, which can simulate the impact of water flow over obstacles on the underwater surface in front, testing its scouring effect and further expanding the application range of the test device.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A test method for simulating the scouring effect of water flow on rock specimens. In this method, the strength of the specimen is detected by controlling the water flow to impact the specimen for a period of time, and the change in its strength is obtained to obtain its resistance to scouring and erosion. The method is characterized in that the test water is controlled to flow naturally downward from a high place by gravity to impact the specimen.

[0009] The test specimens can be natural rock or concrete. This method can be applied to the study of the erosion resistance of stone or concrete specimens used in the construction of water conservancy projects such as ditches or spillways, and can also be widely used in scientific research on the erosion capacity of natural water bodies such as rivers and streams. Because this method utilizes the weight of the water flow to create an impact force that erodes the specimen, it better reflects the actual situation of water erosion in natural environments, thus improving the accuracy of the test.

[0010] Furthermore, the temperature of the test water is controlled so that the test specimen is impacted at a specific temperature.

[0011] In this way, the temperature can be controlled to mimic the actual temperature parameters to subject the specimen to water flow impact, thereby improving the accuracy and practicality of the test.

[0012] Furthermore, while keeping the water flow impact angle and cross-sectional area constant, the water flow velocity was increased to increase the water flow impact force and conduct an impact test on the specimen.

[0013] This can shorten the test time for water flow impact tests at specific impact angles and water flow depths, making the tests more efficient.

[0014] Furthermore, obstacles were placed in front of the specimen, allowing the water flow to pass over the obstacles and impact the specimen.

[0015] This allows for testing the impact and damage effect of water flow over obstacles on the underwater structure in front of the obstacle.

[0016] Furthermore, this method employs a water flow scouring test device. The water flow scouring test device includes a first water tank for holding test water, an outlet on one side of the first water tank, a water outlet trough component connected obliquely downward at the outlet of the first water tank, a specimen mounting groove on the bottom surface of the trough component, and a water outlet control mechanism for controlling the water flow from the first water tank.

[0017] In this way, when using this device, test water is pumped into the first water tank, and the water flow is controlled by the water outlet control mechanism to flow out from the outlet, passing through the water outlet trough component and rushing downwards to conduct a scouring test on the test specimen installed in the specimen mounting slot. After a certain period of time (usually more than half a month), the shape of the test specimen is observed and its strength change is detected to obtain its scouring resistance performance results.

[0018] Furthermore, a second water tank is connected below the water outlet component. This facilitates the collection of test water flowing out from below the water outlet component.

[0019] Furthermore, the water outlet control mechanism includes a return water pipe connected between the second water tank and the first water tank, and a regulating water pump is installed on the return water pipe.

[0020] In this way, the test water is circulated between the first water tank, the outlet tank, and the second water tank via the return water pipe, avoiding water waste. Simultaneously, the amount of water used for circulation can be adjusted by controlling the power of the water pump, thus controlling the water output from the first water tank. The structure is simple and can stably control the amount of water used for test flushing at a fixed level, improving the accuracy of the test.

[0021] Furthermore, the lower end of the second water tank is installed on the ground via a second lifting control mechanism, and the upper end of the water outlet component and the water outlet of the first water tank are flexibly connected using a flexible material, while the lower end of the water outlet component and the second water tank are movably connected.

[0022] In this way, the height of the second water tank can be controlled by the second lifting mechanism, and the inclination of the outlet trough component can be adjusted by adjusting its height. This allows the inclination of the outlet trough component to be adjusted to match the actual situation when simulating an inclined ditch or flood discharge channel for scouring tests, ensuring the test results. When the test requires increased impact force to shorten the test time, the inclination of the outlet trough component can also be increased to enhance the impact force of the water flow on the tested component and shorten the test time.

[0023] Furthermore, the second lifting mechanism includes a lifting top plate, a second water tank installed above the lifting top plate, and a lifting cylinder vertically disposed between the lifting top plate and the ground.

[0024] This design features a simple structure and convenient control. The lifting cylinder can be implemented using a hydraulic cylinder or an electric cylinder; the specific structure will not be detailed here.

[0025] Furthermore, the bottom plate of the first water tank and the four side tanks are connected by a sliding connection. A flexible rubber sleeve is also connected and installed in the inner cavity of the first water tank below the water outlet. The flexible rubber sleeve is supported on the bottom plate. The test water is filled above the flexible rubber sleeve. A first lifting control mechanism is installed between the bottom plate and the ground.

[0026] In this way, the base plate can be moved up and down by the first lifting control mechanism, thereby controlling the overall water level in the first water tank to rise or fall, achieving a better effect of regulating and controlling the water output. The first lifting mechanism can be implemented by a hydraulic cylinder or an electric cylinder.

[0027] Furthermore, a water outlet control valve is installed above the outlet of the first water tank.

[0028] In this way, the size of the outlet area can be controlled by the outlet control gate valve. Importantly, the outlet control gate valve, combined with the first lifting control mechanism, achieves a specific purpose: by raising the water level in the first water tank while keeping the cross-sectional area of ​​the outlet water flow constant (or changing it very little), it increases the kinetic energy of the water flow in the outlet channel component. This allows for increased water flow impact force while maintaining the inclination of the outlet channel component and the water flow depth (i.e., the cross-sectional area of ​​the water passage). This better meets the requirements of natural simulation by increasing the impact force of the water flow itself, thus shortening the test time. Furthermore, this increase in impact force still relies on the water flow's own weight, unlike the prior art which relied on artificial intervention such as pumps, resulting in poor simulation and low test reliability.

[0029] Furthermore, a temperature control device is also installed to control the temperature of the test water. This allows the test water temperature to be adjusted as needed to match the actual water flow scouring environment temperature, thus improving the reliability of the test.

[0030] Furthermore, the temperature control device includes an electric heating device installed in the first water tank, and a temperature probe installed at the specimen mounting slot.

[0031] In this way, the water temperature can be detected by a temperature probe at the installation slot, and the feedback can be used to control the electric heating device to adjust the water temperature, thereby improving the accuracy of temperature regulation.

[0032] Furthermore, an obstacle simulation device is also provided inside the water outlet tank component, located on the upper side near the specimen mounting slot. The obstacle simulation device includes an obstacle simulation module, and the two ends of the obstacle simulation module are installed and fixed on the tank walls on both sides of the water outlet tank component through connecting brackets.

[0033] Thus, because the water flow impacts the underwater surface in front of the obstacle after passing through it, rapidly eroding and creating a hole, this area becomes a weak point in the underwater structure. The obstacle simulation device can simulate this situation for testing. It obtains data on the impact of water flow erosion on the riverbed of different materials in natural water bodies when obstacles are present. It can also be used in hydraulic engineering projects such as spillways to test the erosion effect of water flow over obstacles (energy dissipation structures) on the bottom of the spillway. This further expands the application range of the testing device.

[0034] Furthermore, the obstacle simulation device includes an obstacle mounting base. The width of the obstacle mounting base matches the width of the inner bottom surface of the water outlet trough component and can slide up and down to fit against the inner bottom surface of the water outlet trough component. The upper end of the obstacle mounting base has a snap-fit ​​groove for installing and fixing the obstacle simulation module. The two ends of the obstacle mounting base are fixedly connected to the connecting bracket. The upper end of the connecting bracket extends upward along the inner side wall of the water outlet trough component and has a hook-fit end that extends outward and downward to form a hook. A screw hole is horizontally provided on the hook-fit end and is fixedly mounted on the outer side wall of the water outlet trough component by bolts.

[0035] This design offers two advantages: First, it allows for convenient adjustment of the obstacle simulation device's vertical position. Adjustment is achieved simply by loosening the bolts, allowing the device to slide up and down along the outlet channel component. Once adjusted to the desired position, it can be fixed in place, a quick and easy process that does not affect the water flow within the channel. Second, it facilitates the replacement of obstacle simulation modules of different heights and shapes for testing. Furthermore, by installing specially structured obstacle simulation modules, turbulence can be created within the outlet channel component to simulate turbulent conditions in natural water bodies, allowing for testing the scouring effect of turbulent water flow on the test specimen. For example, a turbulence generation module can be designed, with a snap-fit ​​end at the bottom that can be fixed into a snap-fit ​​groove, and a turbulence generation end at the top. This allows for installation into the snap-fit ​​groove and fixation to the upper part of the outlet channel component to generate turbulence. The turbulence generation end can be implemented using an interlocking mesh structure, employing two sets of connecting rods, each set consisting of multiple parallel connecting rods, which are then hinged together to form a stretchable mesh structure. This allows for easy adjustment of the turbulence magnitude. The turbulence generation end can also be achieved by using two staggered orifice plates fixed with bolts, so as to facilitate the adjustment of the turbulence magnitude through staggered adjustment.

[0036] Furthermore, the test water is mixed with dark-colored microspheres for tracer purposes. The specific gravity of the dark-colored microspheres is the same as that of the test water, so that they are suspended in the test water. A high-speed camera is also installed directly above the water outlet component at the specimen mounting slot, and the high-speed camera is connected to the control center.

[0037] In this way, the movement of dark-colored particle spheres can be tracked and captured by a high-speed camera, allowing for the calculation of water flow velocity. The impact of the water flow on the specimen surface can be visually observed through these dark-colored particle spheres. Furthermore, when turbulent conditions need to be simulated, the three-dimensional velocity field of the dark-colored particle spheres can be obtained through flow field analysis, and the turbulence intensity and kinetic energy of the water flow can be further calculated to characterize the magnitude of the turbulence, enabling feedback for regulation and control. This allows for better simulation of turbulent water environment scouring tests on specimens. The specific calculation process utilizes mature existing technologies such as particle image velocimetry, and will not be detailed here.

[0038] In summary, this invention can better simulate the natural flow of water to conduct water scouring tests, enabling it to better study the scouring effect of naturally flowing water on the test specimens and has a wider range of applicability. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the water flow scouring test device used in this invention.

[0040] Figure 2 for Figure 1 An enlarged structural diagram of the mounting slot location for a single specimen.

[0041] Figure 3 for Figure 2 Sectional view of AA.

[0042] Figure 4 This is a schematic diagram of the structure of the first type of turbulence manufacturing module during implementation.

[0043] Figure 5 This is a schematic diagram of the structure of the second type of turbulence manufacturing module during implementation. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to specific embodiments.

[0045] Detailed implementation method: A test method for simulating the scouring effect of water flow on rock specimens. In this method, the strength of the specimen is detected by controlling the water flow to impact the specimen for a period of time, and the change in its strength is obtained, and its resistance to scouring and erosion is obtained. The characteristic is that during the test, the test water is controlled to flow naturally downward from a high place by gravity to achieve the impact on the specimen.

[0046] The test specimens can be natural rock or concrete. This method can be applied to the study of the erosion resistance of stone or concrete specimens used in the construction of water conservancy projects such as ditches or spillways, and can also be widely used in scientific research on the erosion capacity of natural water bodies such as rivers and streams. Because this method utilizes the weight of the water flow to create an impact force that erodes the specimen, it better reflects the actual situation of water erosion in natural environments, thus improving the accuracy of the test.

[0047] The temperature of the test water can also be controlled during the test, so that the test specimen is impacted at a specific temperature.

[0048] In this way, the temperature can be controlled to mimic the actual temperature parameters to subject the specimen to water flow impact, thereby improving the accuracy and practicality of the test.

[0049] During the test, while keeping the water flow impact angle and cross-sectional area constant, the water flow velocity can be increased to increase the water flow impact force on the specimen.

[0050] This can shorten the test time for water flow impact tests at specific impact angles and water flow depths, making the tests more efficient.

[0051] During the test, obstacles can also be placed in front of the specimen so that the water flow can pass over the obstacles and impact the specimen.

[0052] This allows for testing the impact and damage effect of water flow over obstacles on the underwater structure in front of the obstacle.

[0053] In the specific implementation of this experimental method, the following approach is adopted: Figure 1-3 The water flow scouring test device shown includes a first water tank 1 for holding test water, an outlet on one side of the first water tank 1, a water outlet trough component 2 connected obliquely downward at the outlet of the first water tank, a specimen mounting groove 3 on the bottom surface of the trough component 2, and a water outlet control mechanism for controlling the water flow from the first water tank.

[0054] In this device, test water is pumped into the first water tank, and the water flow is controlled by the outlet control mechanism. The water flows out through the outlet trough and downwards, subjecting the test specimen installed in the specimen mounting slot to a scouring test. After a certain period (usually more than half a month), the shape of the test specimen is observed, and its strength change is detected to obtain its scouring resistance results. The test specimen can be natural rock or concrete. This method can be applied to the study of the scouring resistance of stone or concrete specimens used in the construction of water conservancy projects such as ditches or spillways, and can also be widely used in scientific research on the scouring capacity of natural water bodies such as rivers and streams. Because this method utilizes the weight of the water flow to create an impact force that scours the specimen, it better reflects the actual situation of water scouring in the natural environment and can better improve the accuracy of the test.

[0055] A second water tank 4 is connected below the water outlet component 2. This facilitates the collection of test water flowing out from below the water outlet component.

[0056] The water outlet control mechanism includes a return water pipe 5 connected between the second water tank 4 and the first water tank 1, and a regulating water pump 6 is installed on the return water pipe 5.

[0057] In this way, the test water is circulated between the first water tank, the outlet tank, and the second water tank via the return water pipe, avoiding water waste. Simultaneously, the amount of water used for circulation can be adjusted by controlling the power of the water pump, thus controlling the water output from the first water tank. The structure is simple and can stably control the amount of water used for test flushing at a fixed level, improving the accuracy of the test.

[0058] The lower end of the second water tank 4 is installed on the ground through the second lifting control mechanism. The upper end of the water outlet component 2 and the water outlet of the first water tank 1 are flexibly connected by a flexible material. The lower end of the water outlet component 2 and the second water tank are movably connected.

[0059] In this way, the height of the second water tank can be controlled by the second lifting mechanism, and the inclination of the outlet trough component can be adjusted by adjusting its height. This allows the inclination of the outlet trough component to be adjusted to match the actual situation when simulating an inclined ditch or flood discharge channel for scouring tests, ensuring the test results. When the test requires increased impact force to shorten the test time, the inclination of the outlet trough component can also be increased to enhance the impact force of the water flow on the tested component and shorten the test time.

[0060] The second lifting mechanism includes a lifting top plate 7, a second water tank 4 installed above the lifting top plate 7, and a lifting cylinder 8 vertically arranged between the lifting top plate and the ground.

[0061] This design features a simple structure and convenient control. The lifting cylinder can be implemented using a hydraulic cylinder or an electric cylinder; the specific structure will not be detailed here.

[0062] The bottom plate 9 of the first water tank 1 and the four side tanks are connected by a sliding connection. A flexible rubber sleeve 10 is also connected in the inner cavity of the first water tank 1 below the water outlet. The flexible rubber sleeve 10 is supported on the bottom plate 9. The test water is filled above the flexible rubber sleeve 9. A first lifting control mechanism 11 is set between the bottom plate and the ground.

[0063] In this way, the base plate can be moved up and down by the first lifting control mechanism, thereby controlling the overall water level in the first water tank to rise or fall, achieving a better effect of regulating and controlling the water output. The first lifting mechanism can be implemented by a hydraulic cylinder or an electric cylinder.

[0064] Among them, a water outlet control valve 12 is installed above the water outlet of the first water tank 1.

[0065] In this way, the size of the outlet area can be controlled by the outlet control gate valve. Importantly, the outlet control gate valve, combined with the first lifting control mechanism, achieves a specific purpose: by raising the water level in the first water tank while keeping the cross-sectional area of ​​the outlet water flow constant (or changing it very little), it increases the kinetic energy of the water flow in the outlet channel component. This allows for increased water flow impact force while maintaining the inclination of the outlet channel component and the water flow depth (i.e., the cross-sectional area of ​​the water passage). This better meets the requirements of natural simulation by increasing the impact force of the water flow itself, thus shortening the test time. Furthermore, this increase in impact force still relies on the water flow's own weight, unlike the prior art which relied on artificial intervention such as pumps, resulting in poor simulation and low test reliability.

[0066] It also includes a temperature control device to regulate the temperature of the test water. This allows the test water temperature to be adjusted as needed to match the actual ambient temperature of the water flow, thus improving the reliability of the test.

[0067] The temperature control device includes an electric heating device 13 installed in the first water tank, and a temperature probe (not shown in the figure) installed at the specimen mounting slot. In practice, both the electric heating control device 13 and the temperature probe are connected to the control center 14.

[0068] In this way, the water temperature can be detected by a temperature probe at the installation slot, and the feedback can be used to control the electric heating device to adjust the water temperature, thereby improving the accuracy of temperature regulation.

[0069] Among them, an obstacle simulation device is also provided in the water outlet tank component, located on the upper side near the test specimen installation slot. The obstacle simulation device includes an obstacle simulation module 15, and the two ends of the obstacle simulation module 15 are installed and fixed on the tank walls on both sides of the water outlet tank component through connecting brackets 16.

[0070] Thus, because the water flow impacts the underwater surface in front of the obstacle after passing through it, rapidly eroding and creating a hole, this area becomes a weak point in the underwater structure. The obstacle simulation device can simulate this situation for testing. It obtains data on the impact of water flow erosion on the riverbed of different materials in natural water bodies when obstacles are present. It can also be used in hydraulic engineering projects such as spillways to test the erosion effect of water flow over obstacles (energy dissipation structures) on the bottom of the spillway. This further expands the application range of the testing device.

[0071] The obstacle simulation device includes an obstacle mounting base 17. The width of the obstacle mounting base 17 matches the width of the inner bottom surface of the water outlet trough component 2 and can slide up and down to fit against the inner bottom surface of the water outlet trough component 2. The upper end of the obstacle mounting base 17 has a snap-fit ​​groove for installing and fixing the obstacle simulation module. The two ends of the obstacle mounting base 17 are fixedly connected to the connecting brackets 16. The upper end of the connecting bracket extends upward along the inner side wall of the water outlet trough component and has a hook end that extends outward and downward to form a hook. A screw hole is horizontally provided on the hook end and is fixedly abutted and fastened to the outer side wall of the water outlet trough component 2 by bolts 18.

[0072] This design offers two advantages: First, it allows for convenient adjustment of the obstacle simulation device's vertical position. Adjustment is achieved simply by loosening the bolts, allowing the device to slide up and down along the water outlet component. Once adjusted to the desired position, it can be secured, making the process quick, convenient, and without affecting the water flow within the tank. Second, it facilitates the replacement of obstacle simulation modules of different heights and shapes for testing purposes.

[0073] In addition, a specially structured obstacle simulation module was designed to be installed on an obstacle mounting base to create turbulence in the outlet channel component, simulating turbulent conditions in natural water bodies, and testing the scouring effect of water flow on the test specimen under turbulent conditions. Specifically, the specially structured obstacle simulation module is a turbulence generation module. The lower end of the turbulence generation module is a snap-fit ​​end that can be fixed into a snap-fit ​​groove, and the upper end is a turbulence generation end. This allows it to be installed into the snap-fit ​​groove and fixed to the upper part of the outlet channel component to create turbulence. The turbulence generation end can be... Figure 4 The staggered, hinged mesh structure shown is achieved by using two sets of connecting rods 21, each set comprising multiple parallel connecting rods, which are then hinged together to form a stretchable mesh structure. This allows for easy adjustment of the turbulence magnitude. The turbulence generation end can also be... Figure 5 The two offset plates shown are then fixed with bolts using a perforated plate 22, which allows for easy adjustment of the turbulence magnitude through offset adjustment.

[0074] The test water contains dark-colored microspheres 19 for tracer purposes. The specific gravity of the dark-colored microspheres 19 is the same as that of the test water, so that they are suspended in the test water. A high-speed camera 20 is also installed directly above the water outlet component at the specimen mounting slot. The high-speed camera 20 is connected to the control center 14.

[0075] In this way, the movement of dark-colored particle spheres can be tracked and captured by a high-speed camera, allowing for the calculation of water flow velocity. The impact of the water flow on the specimen surface can be visually observed through these dark-colored particle spheres. Furthermore, when turbulent conditions need to be simulated, the three-dimensional velocity field of the dark-colored particle spheres can be obtained through flow field analysis, and the turbulence intensity and kinetic energy of the water flow can be further calculated to characterize the magnitude of the turbulence, enabling feedback for regulation and control. This allows for better simulation of turbulent water environment scouring tests on specimens. The specific calculation process utilizes mature existing technologies such as particle image velocimetry, and will not be detailed here.

Claims

1. A water outlet tank component for a water flow scouring test, wherein the water outlet tank component is inclined and connected to the outlet of a first water tank at its upper angle, and a specimen mounting groove is provided on the bottom surface of the lower part of the water outlet tank component, characterized in that, An obstacle simulation device is also installed inside the water outlet tank component, located on the upper side near the specimen mounting slot. The obstacle simulation device includes an obstacle simulation module. The two ends of the obstacle simulation module are fixed to the tank walls on both sides of the water outlet tank component through connecting brackets. It is used to simulate the downward impact of water flow on the bottom of the water in front of the obstacle after it passes over the obstacle. The obstacle simulation device includes an obstacle mounting base. The width of the obstacle mounting base matches the width of the inner bottom surface of the water outlet trough component and can slide up and down to fit against the inner bottom surface of the water outlet trough component. The upper end of the obstacle mounting base has a snap-fit ​​groove for installing and fixing the obstacle simulation module. The two ends of the obstacle mounting base are fixedly connected to the connecting bracket. The upper end of the connecting bracket extends upward along the inner side wall of the water outlet trough component and has a hook end that extends outward and downward to form a hook. A screw hole is horizontally provided on the hook end and is fixedly mounted on the outer side wall of the water outlet trough component by bolts. The obstacle simulation module includes a turbulence generation module, the lower end of which is a snap-fit ​​end that can be fixed into the snap-fit ​​slot, and the upper end is a turbulence generation end; The turbulence generation end is achieved using an interlocked mesh structure, which includes two sets of connecting rods, each set of connecting rods including multiple parallel connecting rods, and the two sets of connecting rods are hinged together to form a stretchable mesh structure; or the turbulence generation end is achieved using two staggered perforated plates fixed with bolts.

2. The outlet tank component for water flow scouring test as described in claim 1, characterized in that, A second water tank is connected and installed below the water outlet trough component.

3. The outlet tank component for water flow scouring test as described in claim 2, characterized in that, The lower end of the second water tank is installed on the ground through the second lifting control mechanism. The upper end of the water outlet component and the water outlet of the first water tank are flexibly connected by a flexible material. The lower end of the water outlet component and the second water tank are movably connected.

4. The outlet tank component for water flow scouring test as described in claim 3, characterized in that, The second lifting mechanism includes a lifting top plate, a second water tank installed above the lifting top plate, and a lifting cylinder vertically disposed between the lifting top plate and the ground.

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