Rainfall simulation device for slope washout test

Abstract

The utility model relates to the technical field of rainfall simulation, and provides a rainfall simulation device for a side slope washout test, which comprises a base, a panel groove used for filling filler to form a simulated side slope is hinged on the base, a first telescopic cylinder for driving the panel groove to rotate is hinged on the base, a mounting plate is arranged on one side of the panel groove, and a second telescopic cylinder is arranged on the other side of the panel groove. A second telescopic cylinder for driving the mounting plate to move up and down is arranged on the base, a water spraying assembly and a driving mechanism for driving the water spraying assembly to rotate at multiple angles are hinged to the mounting plate, a fan located on the side, away from the panel groove, of the second telescopic cylinder is arranged on the base, and a water tank is arranged on the base; a booster pump used for pumping water in the water tank into the water spraying assembly is arranged on the water tank, an L-shaped fixing plate is fixedly connected to the upper side face of the mounting plate, and by means of the technical scheme, the problem that in the prior art, the water spraying position of a nozzle cannot be adjusted when raining is simulated on a ramp is solved.

Description

Technical Field

[0001] This utility model relates to the field of rainfall simulation technology, specifically to a rainfall simulation device for slope erosion testing. Background Technology

[0002] The main factors influencing roadbed slope erosion include the type and compaction degree of the slope soil filler, slope length, slope gradient, ecological protection status, rainfall intensity, and rainfall duration. Analyzing the impact of different factors on slope erosion and identifying the relationships between these factors is key to roadbed slope erosion research. Currently, roadbed slope erosion tests commonly use field tests and indoor simulation tests. Field tests are time-consuming and costly due to the strong seasonality and uneven annual distribution of natural rainfall, and are also affected by external forces such as wind loads and freeze-thaw cycles, making it difficult to obtain effective data. In contrast, indoor simulation tests are unaffected by natural factors and can obtain a large amount of effective test data in a short period of time, leading to their increasingly widespread application in recent years.

[0003] Chinese invention patent (CN106290127B) discloses a rainfall simulation device for indoor simulation tests of roadbed slope erosion. The device includes a vehicle body, a position adjustment mechanism, nozzles for spraying water, a spray box for mounting the nozzles, and an angle indicator II for detecting the angle between the spray box and the horizontal plane. The position adjustment mechanism includes a base, a lifting cylinder, a support plate, an adjusting cylinder I, and an adjusting cylinder II. The base is fixed to the vehicle body, and the support plate is connected to the base via the lifting cylinder. The spray box is connected to the support plate via the adjusting cylinder I, and the adjusting cylinder II supports the adjusting cylinder I and changes the tilt angle between the adjusting cylinder I and the horizontal plane through the extension and retraction of the adjusting cylinder II. However, in real-world environments, the direction of rainwater rushing towards the slope is constantly changing due to wind speed. This device cannot provide sufficient experimental basis for the design and construction of roadbed slope structures.

[0004] In the aforementioned application, the coordination between components such as the vehicle body and adjustment mechanism makes it difficult to solve the problem of not being able to adjust the spray nozzle position when simulating rain on a slope. This results in the inability to simulate various types of rainfall, making it impossible to study the slope erosion performance under different rainfall angles. The slope erosion test also cannot be closer to the actual situation, which is not conducive to slope treatment and needs to be improved. Utility Model Content

[0005] This invention proposes a rainfall simulation device for slope scour tests, which solves the problems mentioned in the above documents.

[0006] The technical solution of this utility model is as follows: a rainfall simulation device for slope erosion testing, comprising a base, a panel groove for filling with filler to form a simulated slope is hinged on the base, a first telescopic cylinder for driving the panel groove to rotate is hinged on the base, a mounting plate is provided on one side of the panel groove, a second telescopic cylinder for driving the mounting plate to move up and down is provided on the base, a water spray assembly and a drive mechanism for driving the water spray assembly to rotate at multiple angles are hinged on the mounting plate, a fan is provided on the base on the side of the second telescopic cylinder away from the panel groove, a water tank is provided on the base, and a booster pump for pumping water from the water tank to the water spray assembly is provided on the water tank.

[0007] Furthermore, an L-shaped fixing plate is fixedly connected to the upper side of the mounting plate, the lower end of the vertical part of the fixing plate is fixedly connected to the mounting plate, a connecting plate is hinged to the horizontal end of the fixing plate, and the other end of the connecting plate is hinged to the water spray assembly, so that rainwater can wash it away through the water spray assembly.

[0008] Furthermore, the fan has two components, one of which is fixedly connected to the upper side of the horizontal part of the fixed plate, and the other is fixedly connected to the upper side of the base. The two fans are opposite each other in the vertical direction, and the fans are used to blow air to simulate windy and rainy weather.

[0009] Furthermore, the water spray assembly includes several parallel and spaced water spray pipes and several connecting rods connected to each of the water spray pipe assemblies. The lower end of each water spray pipe is provided with a pipe joint. The middle part of the uppermost connecting rod is hinged to the connecting plate. The connecting rod is arranged perpendicular to the water spray pipe. The side of the water spray pipe facing the panel groove is provided with several nozzles that are evenly spaced along the axial direction of the water spray pipe. The number of nozzles is sufficient to spray several raindrops simultaneously.

[0010] Furthermore, the drive mechanism includes a third telescopic cylinder and a fourth telescopic cylinder. The cylinder body of the third telescopic cylinder is hinged to the mounting plate, and the piston rod of the third telescopic cylinder is hinged to the connecting plate. The cylinder body of the fourth telescopic cylinder is hinged to the connecting plate, and the piston rod of the fourth telescopic cylinder is hinged to the connecting rod. The third telescopic cylinder and the fourth telescopic cylinder are used to extend and retract the panel groove.

[0011] Furthermore, the booster pump has a first connecting pipe at its inlet and a second connecting pipe at its outlet. The first connecting pipe extends into the bottom of the water tank, and the second connecting pipe includes a main pipe and several branch pipes. The branch pipes are respectively connected to the pipe joints at the lower ends of several spray pipes. The main pipe is connected to the outlet of the booster pump and is connected to the water tank through several water pipes.

[0012] Furthermore, the base is provided with a groove, the panel groove and the first telescopic cylinder are both arranged in the panel groove, the bottom of the groove is provided with a number of drainage holes, the bottom of the groove is provided with a filter screen covering the drainage holes, the base is provided with a flow channel connecting the water tank and the drainage holes, and the filter screen helps to filter out rainwater.

[0013] Furthermore, the upper end of the water tank is provided with a water inlet pipe, and a pipe cap is threaded onto the water inlet pipe. The design of the water inlet pipe facilitates the replenishment of water to the water tank.

[0014] Furthermore, a uniform air blowing assembly is provided on the top of the mounting plate. The uniform air blowing assembly includes a vertical rod, the bottom of which is fixedly connected to the top of the mounting plate. A horizontal plate is fixedly connected to the side of the vertical rod, and an L-shaped rod is fixedly connected to the side of the horizontal plate. A motor is fixedly connected to the bottom of the L-shaped rod, and a threaded rod is fixedly connected to the output shaft of the motor. A threaded sleeve is threadedly connected to the circumferential surface of the threaded rod. A limit rod is fixedly connected to the bottom of the motor, and the end of the limit rod away from the motor passes through the top of the threaded sleeve. A horizontal rod is fixedly connected to the side of the threaded sleeve, and a long rod is fixedly connected to the side of the horizontal rod. A fan is provided at the end of the long rod away from the horizontal rod, driving the fan to move up and down to blow air, making the airflow more uniform.

[0015] Furthermore, the fan is located on the side of the panel groove, and there are two threaded sleeves, fans, and threaded rods, which are symmetrical to each other along the vertical central axis of the mounting plate. The presence of two fans blowing air into the panel groove helps to increase the airflow effect.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] 1. In this utility model, through the cooperation of components such as the first telescopic cylinder, mounting plate, booster pump, and water spray pipe, filler is filled into the panel groove to form a simulated slope. By controlling the first telescopic cylinder, the slope inclination angle is adjusted to the design angle. The booster pump is turned on, pumping water from the water tank to the water spray pipe. The water in the water spray pipe is sprayed from the nozzles onto the slope in the panel groove. During the test, the water spray assembly is adjusted to the required height using the second telescopic cylinder; the spray angle of the nozzles is adjusted using the third and fourth telescopic cylinders to simulate various rainfall events, thereby studying the slope erosion performance under different rainfall angles. During the test, the fan is turned on, and the direction of the water sprayed from the nozzles changes under the action of the fan, thus changing the force of the spray onto the slope. This makes the slope erosion test closer to actual conditions, providing more sufficient experimental data for the design and construction of roadbed slope structures, and is more conducive to slope treatment.

[0018] 2. In the rainfall simulation device for slope scour testing of this utility model, a groove is set on the base, and the surface plate is set in the groove on the base. Water in the groove can flow into the water tank through the filter screen, realizing water recycling.

[0019] 3. This utility model achieves wind simulation by coordinating the fan, motor, threaded rod, and other components within the uniform airflow assembly. The fan moves up and down to blow air onto the slope of the panel groove, thus simulating wind. The up-and-down movement of the fan makes the wind force more even. The up-and-down movement of the fan can simulate wind changes, making the wind force effect more uniform. Traditional rainfall simulation devices may only rely on a fixed wind source, resulting in uneven wind force distribution. However, the up-and-down movement of the fan can make the wind force change over time, simulating the impact of different wind speeds and directions on rainfall. This helps to study the real impact of wind force on the scouring effect of rainfall. The fan and panel groove are designed to work closely together. The fan blows air on the slope of the panel groove, which can simulate the blowing effect of wind force on the slope during rainfall. This design makes the interference of wind force on rainfall more direct and effective, and the simulation effect is closer to the natural phenomenon in the real environment. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the rainfall simulation device for slope erosion testing according to this utility model;

[0022] Figure 2 This is the utility model Figure 1 A magnified view of A in the middle;

[0023] Figure 3 This is a schematic diagram of the water spray component in the rainfall simulation device for slope scour testing according to this utility model;

[0024] Figure 4 This is a three-dimensional side view of the base structure of this utility model;

[0025] Figure 5 This utility model Figure 4 A three-dimensional magnified structural diagram of B.

[0026] In the diagram: 1. Base; 2. Groove; 3. Panel groove; 4. First telescopic cylinder; 5. Filter screen; 6. Drain hole; 7. Flow channel; 8. Second telescopic cylinder; 9. Mounting plate; 10. Fixing plate; 11. Fan; 12. Connecting plate; 13. Spray pipe; 14. Nozzle; 15. Connecting rod; 16. Pipe connector; 17. Third telescopic cylinder; 18. Fourth telescopic cylinder; 19. Water tank; 20. Water inlet pipe; 1. Pipe cap; 22. Booster pump; 23. First connecting pipe; 24. Second connecting pipe; 25. Main pipe; 26. Branch pipe; 28. Uniform air blowing assembly; 2801. Vertical rod; 2802. Horizontal plate; 2803. L-shaped rod; 2804. Motor; 2805. Threaded rod; 2806. Threaded sleeve; 2807. Limiting rod; 2808. Horizontal rod; 2809. Long rod; 2810. Fan. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0028] Example 1

[0029] like Figures 1-3 As shown, this embodiment proposes a rainfall simulation device for slope scour testing, including a base 1. A panel groove 3 for filling with filler to form a simulated slope is hinged on the base 1. A first telescopic cylinder 4 for driving the panel groove 3 to rotate is hinged on the base 1. A mounting plate 9 is provided on one side of the panel groove 3. A second telescopic cylinder 8 for driving the mounting plate 9 to move up and down is provided on the base 1. A water spray assembly and a drive mechanism for driving the water spray assembly to rotate at multiple angles are hinged on the mounting plate 9. A fan 11 is provided on the base 1 on the side of the second telescopic cylinder 8 away from the panel groove 3. A water tank 19 is provided on the base 1. A booster pump 22 for pumping water from the water tank 19 to the water spray assembly is provided on the water tank 19.

[0030] An L-shaped fixing plate 10 is fixedly connected to the upper side of the mounting plate 9. The lower end of the vertical part of the fixing plate 10 is fixedly connected to the mounting plate 9. A connecting plate 12 is hinged to the horizontal end of the fixing plate 10. The other end of the connecting plate 12 is hinged to the water spray assembly, and rainwater is washed through the water spray assembly.

[0031] There are two fans 11. One fan 11 is fixedly connected to the upper side of the horizontal part of the fixed plate 10, and the other fan 11 is fixedly connected to the upper side of the base 1. The two fans 11 are opposite each other in the vertical direction. By blowing air with the fans 11, wind and rain are simulated.

[0032] The water spray assembly includes several parallel and spaced water spray pipes 13 and several connecting rods 15 connected to each water spray pipe 13 assembly. The lower end of the water spray pipe 13 is provided with a pipe joint 16. The middle part of the uppermost connecting rod 15 is hinged to the connecting plate 12. The connecting rod 15 is arranged perpendicular to the water spray pipe 13. The side of the water spray pipe 13 facing the panel groove 3 is provided with several nozzles 14 evenly spaced along the axial direction of the water spray pipe 13. The number of nozzles 14 is sufficient to spray several rainwater simultaneously.

[0033] The drive mechanism includes a third telescopic cylinder 17 and a fourth telescopic cylinder 18. The cylinder body of the third telescopic cylinder 17 is hinged to the mounting plate 9, and the piston rod of the third telescopic cylinder 17 is hinged to the connecting plate 12. The cylinder body of the fourth telescopic cylinder 18 is hinged to the connecting plate 12, and the piston rod of the fourth telescopic cylinder 18 is hinged to the connecting rod 15. The third telescopic cylinder 17 and the fourth telescopic cylinder 18 are used to telescopically move the panel groove 3.

[0034] The booster pump 22 has a first connecting pipe 23 at its inlet and a second connecting pipe 24 at its outlet. The first connecting pipe 23 extends into the bottom of the water tank 19. The second connecting pipe 24 includes a main pipe 25 and several branch pipes 26. The branch pipes 26 are respectively connected to the pipe joints 16 at the lower ends of several spray pipes 13. The main pipe 25 is connected to the outlet of the booster pump 22 and is connected to the water tank 19 through several water pipes.

[0035] The base 1 is provided with a groove 2, the panel groove 3 and the first telescopic cylinder 4 are arranged in the panel groove 3, the bottom of the groove 2 is provided with several water holes 6, the bottom of the groove 2 is provided with a filter screen pad 5 covering the water holes 6, the base 1 is provided with a flow channel 7 connecting the water tank 19 and the water holes 6, and the filter screen pad 5 is conducive to filtering out rainwater.

[0036] The upper end of the water tank 19 is provided with a water inlet pipe 20, and a pipe cap 21 is threaded onto the water inlet pipe 20. The design of the water inlet pipe 20 makes it convenient to replenish water to the water tank 19.

[0037] In this embodiment, filler is placed in the panel groove 3 to form a simulated slope. The slope inclination angle is adjusted to the design angle by controlling the first telescopic cylinder 4. The booster pump 22 is then activated, pumping water from the water tank 19 to the spray pipe 13. The water in the spray pipe 13 is sprayed from the nozzle 14 onto the slope in the panel groove 3. During the test, the spray assembly is adjusted to the required height using the second telescopic cylinder 8. The spray angle of the nozzle 14 is adjusted using the third telescopic cylinder 17 and the fourth telescopic cylinder 18 to simulate various rainfall events, thereby studying the slope erosion performance under different rainfall angles. During the test, the fan 11 is turned on, and the direction of the water sprayed from the nozzle 14 changes under the action of the fan 11, thus changing the force of the water sprayed onto the slope. This makes the slope erosion test closer to actual conditions, providing more sufficient experimental basis for the design and construction of roadbed slope structures, and is more conducive to slope treatment.

[0038] By setting a groove 2 on the base 1 and placing the surface plate in the groove 2 on the base 1, the water in the groove 2 can flow into the water tank 19 through the filter screen 5, thus realizing water recycling.

[0039] Example 2

[0040] like Figures 3-5 As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes another embodiment. A uniform air blowing assembly 28 is provided on the top of the mounting plate 9. The uniform air blowing assembly 28 includes a vertical rod 2801, the bottom of which is fixedly connected to the top of the mounting plate 9. A horizontal plate 2802 is fixedly connected to the side of the vertical rod 2801, and an L-shaped rod 2803 is fixedly connected to the side of the horizontal plate 2802. A motor 2804 is fixedly connected to the bottom of the L-shaped rod 2803, and a threaded rod 28 is fixedly connected to the output shaft of the motor 2804. 05. A threaded sleeve 2806 is threadedly connected to the circumferential surface of the threaded rod 2805. A limit rod 2807 is fixedly connected to the bottom of the motor 2804. The end of the limit rod 2807 away from the motor 2804 passes through the top of the threaded sleeve 2806. A crossbar 2808 is fixedly connected to the side of the threaded sleeve 2806. A long rod 2809 is fixedly connected to the side of the crossbar 2808. A fan 2810 is set at the end of the long rod 2809 away from the crossbar 2808, which drives the fan 2810 to move up and down to blow air, making the airflow more even.

[0041] The fan 2810 is located on the side of the panel groove 3. There are two threaded sleeves 2806, fans 2810 and threaded rods 2805, which are symmetrical to each other along the vertical central axis of the mounting plate 9. The two fans 2810 blow air onto the panel groove 3, which helps to increase the airflow effect.

[0042] In this embodiment, a motor 2804 is provided. The rotation of the motor 2804 drives the threaded rod 2805 to rotate. The rotation of the threaded rod 2805 causes the threaded sleeve 2806 to move up and down on the threaded rod 2805. The up-and-down movement of the threaded sleeve 2806 causes the crossbar 2808 to move up and down. The up-and-down movement of the crossbar 2808 causes the long rod 2809 to move up and down. The long rod 2809 causes the fan 2810 to move up and down. The fan 2810 is located on the side of the panel groove 3. The up-and-down movement of the fan 2810 blows air onto the slope of the panel groove 3, thus simulating airflow. This up-and-down airflow makes the airflow more even. The vertical movement of the fan 2810 can simulate wind changes, making the wind force more even. Traditional rainfall simulation devices may only rely on a fixed wind source, resulting in uneven wind distribution. However, the vertical movement of the fan 2810 can make the wind force change over time, simulating the impact of different wind speeds and directions on rainfall. This helps to study the real impact of wind force on the scouring effect of rainfall. The design of the fan 2810 is closely integrated with the panel groove 3. The fan 2810 blows air on the slope of the panel groove 3, which can simulate the blowing effect of wind on the slope during rainfall. This design makes the interference of wind force on rainfall more direct and effective, and the simulation effect is closer to the natural phenomenon in the real environment.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rainfall simulation device for use in a side slope scour test, characterized by, The utility model provides a slope simulation device, including base (1), the base (1) is hinged with the panel groove (3) for filling filler to form simulation slope, the base (1) is hinged with the first telescopic cylinder (4) of driving the panel groove (3) rotation, one side of panel groove (3) is equipped with mounting plate (9), the base (1) is equipped with the second telescopic cylinder (8) of driving mounting plate (9) up and down movement, mounting plate (9) is hinged with water spraying subassembly and drive mechanism of driving water spraying subassembly multi -angle rotation, the base (1) is equipped with the fan (11) in the second telescopic cylinder (8) side away from the panel groove (3), the base (1) is equipped with water tank (19), water tank (19) is equipped with the booster pump (22) for pumping the water in water tank (19) to water spraying subassembly.

2. The rainfall simulation apparatus for a side slope scour test according to claim 1, wherein The upper side of the mounting plate (9) is fixedly connected with an L-shaped fixed plate (10), the vertical part of the fixed plate (10) is fixedly connected to the lower end of the mounting plate (9), and the horizontal part of the fixed plate (10) is hingedly connected with a connecting plate (12), and the other end of the connecting plate (12) is hingedly connected with the water spraying assembly.

3. The rainfall simulation apparatus for a side slope scour test according to claim 2, wherein The fan (11) has two, one of which is fixedly connected to the upper side of the horizontal part of the fixed plate (10), and the other is fixedly connected to the upper side of the base (1), and the two fans (11) correspond to each other in the up-down direction.

4. The rainfall simulation apparatus for a side slope scour test according to claim 2, wherein The water spraying assembly includes a plurality of parallel and spaced water spraying pipes (13) and a plurality of connecting rods (15) connected to each water spraying pipe (13) assembly, the lower end of the water spraying pipe (13) is provided with a pipe joint (16), the middle part of the uppermost connecting rod (15) is hingedly connected with the connecting plate (12), the connecting rod (15) is perpendicular to the water spraying pipe (13), and the side of the water spraying pipe (13) facing the panel groove (3) is provided with a plurality of nozzles (14) uniformly and spaced along the axial direction of the water spraying pipe (13).

5. The rainfall simulation apparatus for a side slope scour test according to claim 4, wherein The drive mechanism includes a third telescopic cylinder (17) and a fourth telescopic cylinder (18), the cylinder body of the third telescopic cylinder (17) is hingedly connected to the mounting plate (9), the piston rod of the third telescopic cylinder (17) is hingedly connected to the connecting plate (12), the cylinder body of the fourth telescopic cylinder (18) is hingedly connected to the connecting plate (12), and the piston rod of the fourth telescopic cylinder (18) is hingedly connected to the connecting rod (15).

6. The rainfall simulation apparatus for a side slope scour test according to claim 4, wherein The water inlet of the booster pump (22) is provided with a first connecting pipe (23), the water outlet of the booster pump (22) is provided with a second connecting pipe (24), the first connecting pipe (23) extends into the bottom of the water tank (19), the second connecting pipe (24) includes a main pipe (25) and a plurality of branch pipes (26), the plurality of branch pipes (26) are respectively connected to the pipe joints (16) at the lower ends of the plurality of water spraying pipes (13), and the main pipe (25) is connected to the water outlet of the booster pump (22).

7. The rainfall simulation apparatus for a side slope scour test according to claim 5, wherein The base (1) is provided with a groove (2), the panel groove (3) and the first telescopic cylinder (4) are arranged in the panel groove (3), the groove bottom of the groove (2) is provided with a plurality of water falling holes (6), the groove bottom of the groove (2) is provided with a filter gauze pad (5) covering the water falling holes (6), and the base (1) is provided with a flow channel (7) communicating the water tank (19) and the water falling holes (6).

8. The rainfall simulation apparatus for a side slope scour test according to claim 7, wherein The upper end of the water tank (19) is provided with a water adding pipe (20), and the water adding pipe (20) is threadedly connected with a pipe cap (21).

9. The rainfall simulation apparatus for a side slope scour test according to claim 8, wherein The top of the mounting plate (9) is provided with a uniform blowing assembly (28), the uniform blowing assembly (28) comprises a vertical rod (2801), the bottom of the vertical rod (2801) is fixedly connected to the top of the mounting plate (9), the side of the vertical rod (2801) is fixedly connected with a horizontal plate (2802), the side of the horizontal plate (2802) is fixedly connected with an L-shaped rod (2803), the bottom of the L-shaped rod (2803) is fixedly connected with a motor (2804), the output shaft of the motor (2804) is fixedly connected with a threaded rod (2805), the circumferential surface of the threaded rod (2805) is threadedly connected with a threaded sleeve (2806), the bottom of the motor (2804) is fixedly connected with a limiting rod (2807), one end of the limiting rod (2807) away from the motor (2804) penetrates through the top of the threaded sleeve (2806), the side of the threaded sleeve (2806) is fixedly connected with a horizontal rod (2808), the side of the horizontal rod (2808) is fixedly connected with an elongated rod (2809), and one end of the elongated rod (2809) away from the horizontal rod (2808) is provided with a fan (2810).

10. The rainfall simulation apparatus for a side slope scour test according to claim 9, wherein The fan (2810) is located on the side of the panel groove (3), the threaded sleeve (2806), the fan (2810) and the threaded rod (2805) are provided with two and are symmetrical to each other along the vertical central axis of the mounting plate (9).

Images