Simulation measurement device for freezing and thawing wind erosion of land

Abstract

The invention discloses a land freeze-thaw wind erosion simulation measurement device, which relates to the technical field of soil testing and comprises a testing box, and temperature controllers are symmetrically mounted at the top end of the inner side of the testing box. The functions of slope adjustment, displacement control and dynamic driving are integrated through linkage design, the frozen soil wind erosion testing efficiency and precision are remarkably improved, a slope adjustment mechanism is driven by a bevel gear set, a supporting frame is driven to move reversely through a reverse spiral groove, automatic adjustment of the inclination angle and orientation of the frozen soil slope is synchronously achieved, and manual procedures are reduced; the displacement mechanism drives frozen soil to perform horizontal displacement and vertical reciprocating motion through gear-fluted disc transmission, simulates dynamic interaction and dispersion erosion effects of a natural wind field, observes and reveals a wind erosion positive feedback mechanism in combination with micro-topography evolution, and improves data universality; the driving mechanism utilizes an electric push rod and a double-shaft motor to cooperatively control meshing switching of a bevel gear set and a movable / fixed gear, precise switching of gradient adjustment and a dynamic displacement mode is achieved, and testing continuity is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of soil testing, in particular to a land freeze-thaw wind erosion simulation measurement device. Background Art

[0002] At present, the existing land freeze-thaw wind erosion simulation measurement device can simulate the wind erosion effect of different wind forces on frozen soil under specific temperature conditions, which is of great significance for understanding the mechanism of wind erosion. However, this device has obvious limitations when testing frozen soil storage, that is, it can only ensure that the frozen soil is placed horizontally, so that the frozen soil surface is parallel to the airflow direction, and thus cannot fully evaluate the impact of wind erosion on frozen soil under different slope conditions.

[0003] According to a land freeze-thaw wind erosion simulation measurement device with announcement number CN217033553U, in order to solve the problem that the existing land freeze-thaw wind erosion simulation measurement device cannot measure the influence of different slopes on wind erosion experiments, a fan is rotatably connected to the box wall at one end of the test box, a slideway is fixedly connected to the bottom surface of the test box, a control screw is rotatably connected in the slideway, a positioning slider is threadedly connected to the control screw, an electric push rod is fixedly connected to the positioning slider, a support bottom plate is rotatably connected to the electric push rod, a support top plate is rotatably connected to the support bottom plate, positioning plates are respectively provided at both ends of the support top plate, positioning holes are provided on the positioning plates, connecting holes are respectively provided at both ends of the support bottom plate, the connecting holes are connected to the corresponding positioning holes by bolts, and the rotating shaft connecting end of the support bottom plate and the support top plate is located on one side of the fan.

[0004] With regard to the above-mentioned related schemes, the adjustment of the frozen soil slope is achieved through the cooperation of the supporting top plate, the supporting bottom plate, the positioning plate, the connecting holes and the bolts, and the adjustment of the frozen soil slope direction is achieved through the cooperation of the supporting bottom plate and the rotating limit block. However, during the test, it is necessary to open the transparent cover first, and then adjust and position the frozen soil slope and slope direction through manual operation. This operation method not only interrupts the continuity of the test, but also easily affects the test accuracy due to errors in manual operation. In addition, frequent manual adjustments also greatly reduce the efficiency of the test, making the entire test process cumbersome and time-consuming. Summary of the invention

[0005] The purpose of the present invention is to provide a land freeze-thaw wind erosion simulation measurement device to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a land freeze-thaw wind erosion simulation measurement device, comprising a test box, a temperature controller is symmetrically installed on the top of the inner side of the test box, a fan is equidistantly installed on one side of the inner side of the test box, and a transparent cover is provided on the top of the test box;

[0007] A displacement mechanism is provided at the bottom end of the inner side of the test box, and the displacement mechanism includes a displacement frame movably connected to the test box, the inner side of the displacement frame is connected to a support shaft through a bearing, and a toothed disc is equidistantly connected to the surface of the support shaft, and the end of the toothed disc away from the support shaft is connected to a worm gear B, and the outer side of the displacement frame is movably connected to a support frame, and the front and rear ends of the support frame are both provided with guide rods B, and the inner surface of the test box is symmetrically provided with guide grooves B matching the guide rods B;

[0008] A driving mechanism is provided on one side of the support frame, the driving mechanism includes a mounting frame movably connected to the support frame, a double-axis motor is installed inside the mounting frame, one end of the double-axis motor is slidably connected to a moving gear, the other end of the double-axis motor is connected to a bevel gear A, and an electric push rod is installed between the mounting frame and the support frame;

[0009] A placement plate is arranged above the support frame, and a slope adjustment mechanism is arranged between the placement plate and the support frame. The slope adjustment mechanism includes a rotating column connected to the support frame through a bearing, an outer side of one of the rotating columns is movably connected to a support frame A rotatably connected to the placement plate through a hinge seat, and an outer side of the other rotating column is movably connected to a support frame B movably connected to the placement plate.

[0010] Preferably, tooth plates meshing with the toothed disc are equidistantly arranged at the bottom inner side of the test box, the top end of the worm wheel B is meshingly connected with a worm B rotatably connected to the support frame via a bearing, and one side of the worm B is connected to a fixed gear matching the moving gear.

[0011] Preferably, the guide groove B is composed of a combination of a plurality of straight grooves and oblique grooves, and the support frame and the test box form a sliding structure through the guide rod B and the guide groove B.

[0012] Preferably, support blocks are symmetrically arranged at the bottom end of the displacement frame, and support grooves forming a sliding structure with the support blocks are symmetrically opened at the bottom end of the inner side of the test box.

[0013] Preferably, a limiting groove 703 which forms a sliding structure with the mounting frame is opened on one side inside the supporting frame, and a bevel gear B is meshedly connected to one side of the bevel gear A.

[0014] Preferably, a spiral groove is formed on the outer surface of the rotating column, and the two spiral grooves are arranged in opposite directions. The inner sides of the support frame A and the support frame B are both provided with a limiting member A which forms a sliding structure with the spiral groove.

[0015] Preferably, a guide groove A is symmetrically provided at one end of the placement plate close to the support frame A, and a guide rod A which forms a sliding structure with the guide groove A is symmetrically provided at the top of the support frame A.

[0016] Preferably, the outer surfaces of the two rotating columns are sleeved with a pulley group, and the outer surface of one of the rotating columns is provided with a worm wheel A below the pulley group, one side of the worm wheel A is meshingly connected with a worm A which is rotatably connected to the support frame via a bearing, and the end of the worm A away from the worm wheel A is connected to the bevel gear B.

[0017] Preferably, a limiting mechanism is provided on one side of the bottom end of the support frame, and the limiting mechanism comprises a limiting cylinder welded to the support frame, and a limiting member B is slidably connected to one side of the interior of the limiting cylinder.

[0018] Preferably, a support spring is connected between the limiting member B and the limiting cylinder, and the top and bottom ends of the limiting member B on the side close to the movable gear are both provided with inclined surfaces.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the present invention integrates slope adjustment, displacement control and dynamic drive functions through linkage design, significantly improving the efficiency and accuracy of frozen soil wind erosion testing; the slope adjustment mechanism is driven by a bevel gear set, and the reverse spiral groove drives the support frame to move in the opposite direction, synchronously realizing the automatic adjustment of the inclination angle and direction of the frozen soil slope, and reducing manual processes; the displacement mechanism drives the horizontal displacement and vertical reciprocating motion of the frozen soil through the gear-toothed disc transmission, simulating the dynamic interaction of the natural wind field, dispersing the erosion effect, and combining the micro-topography evolution observation to reveal the positive feedback mechanism of wind erosion, thereby improving the universality of data; the driving mechanism uses an electric push rod and a dual-axis motor to coordinately control the meshing switching of the bevel gear set and the movable / fixed gear, so as to realize the precise switching of the slope adjustment and dynamic displacement mode, and ensure the continuity of the test; the device truly restores the frozen soil wind erosion environment through multi-dimensional parameter joint adjustment and dynamic load simulation, and provides high-precision data support for revealing the erosion mechanism, evaluating the wind resistance and cold area engineering protection, and has both convenient operation and comprehensive testing, and uses a single dual-axis motor to drive multiple mechanisms to operate, thereby reducing power consumption, saving resources and costs.

[0020] 1. In the land freeze-thaw wind erosion simulation measuring device, when the bevel gear A is meshed with the bevel gear B, and the bevel gear A drives the bevel gear B and the worm A to rotate, the worm wheel A rotates together, and the two rotating columns rotate together under the action of the pulley group. Since the support frame A, the support frame B and the rotating column are all slidably connected through the spiral groove and the limiter A, the support frame A and the support frame B both move in the vertical direction. Since the two spiral grooves are set in opposite directions, and the support frame A is slidably connected to the placement plate, and the support frame B is rotatably connected to the placement plate through the hinge seat, the support frame A and the support frame B move in the opposite direction in the vertical direction, thereby realizing automatic and accurate adjustment of the placement plate and the frozen soil slope. By adjusting the frozen soil slope in this way, the direction of the frozen soil slope can be adjusted at the same time, and there is no need to perform additional steps to adjust the direction of the frozen soil slope, thereby effectively reducing an adjustment process, which not only simplifies the operation process, but also significantly improves the efficiency of the test work.

[0021] 2. In the land freeze-thaw wind erosion simulation measurement device, when the moving gear is meshed with the fixed gear and the moving gear drives the fixed gear and the worm B to rotate, the worm wheel B, the support shaft and the toothed disc rotate together. Since the toothed disc is meshed and connected with the toothed plate, and the displacement frame is slidably connected with the test box through the support block and the support groove, the toothed disc and the displacement frame drive the frozen soil to move horizontally, thereby changing the wind force on the frozen soil. Since the support frame is slidably connected with the test box through the guide groove B and the guide rod B, the support frame and the placement plate can drive the frozen soil to move vertically back and forth, so as to simulate the dynamic interaction between wind and the ground surface, thereby more realistically reflecting the erosion process of frozen soil in the natural wind field, and the dynamic movement can disperse the erosion. It can reduce local excessive erosion and make the results more universal. In addition, the vertical reciprocating movement can expose the frozen soil surface evenly to the wind field, avoiding concentrated erosion at a single location due to long-term fixation by wind, thereby more comprehensively evaluating the overall wind erosion resistance of the frozen soil. At the same time, during the dynamic movement process, the frozen soil surface may form micro-topography due to erosion, and the change in roughness will further change the wind field distribution, forming a positive feedback effect. The test can be used to study the evolution of this process. Through the dynamic movement of frozen soil and wind force regulation, the natural wind erosion environment can be simulated more realistically, revealing the erosion mechanism, failure mode and protection needs of frozen soil under dynamic loads, and providing key data support for cold region engineering, ecological protection and climate change research.

[0022] 3. When the land freeze-thaw wind erosion simulation measurement device is in use, since the mounting frame is slidably connected to the support frame through the limit groove 703, the mounting frame can drive the dual-axis motor to move in the vertical direction during the operation and extension of the electric push rod, so as to control the meshing and separation of the bevel gear A and the bevel gear B and the moving gear and the fixed gear. When the bevel gear A is meshed with the bevel gear B and the dual-axis motor is working, the slope adjustment mechanism can be driven by the bevel gear A and the bevel gear B to adjust the slope of the frozen soil and the direction of the frozen soil slope. When the moving gear is meshed with the fixed gear and the dual-axis motor is working, the displacement mechanism can be driven by the moving gear and the fixed gear to dynamically adjust the position of the frozen soil, so as to change the size of the wind force on the frozen soil and improve the authenticity of the simulation. The linkage mechanism can ensure the continuity and test accuracy of the land freeze-thaw wind erosion simulation measurement device test, and improve the test efficiency. A single dual-axis motor is used to drive multiple mechanisms to operate, which reduces power consumption and saves resources and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the driving mechanism, the slope adjustment mechanism and the displacement mechanism of the present invention;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the slope adjustment mechanism of the present invention;

[0026] Figure 4 It is a three-dimensional exploded view of the slope adjustment mechanism of the present invention;

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the driving mechanism of the present invention;

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the displacement mechanism of the present invention;

[0029] Figure 7 It is a partial side cutaway view of the present invention;

[0030] Figure 8 It is a three-dimensional structural schematic diagram of the limiting mechanism of the present invention;

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the support frame of the present invention;

[0032] Fig.10 is a side cutaway view of the present invention;

[0033] Fig.11 For the present invention Fig.10 Enlarged structural diagram at A in the middle.

[0034] In the figure: 1. test box; 2. fan; 3. temperature controller; 4. transparent cover; 5. placement plate; 6. slope adjustment mechanism; 601. worm A; 602. worm wheel A; 603. rotating column; 604. pulley group; 605. spiral groove; 606. limiter A; 607. support frame A; 608. support frame B; 609. guide rod A; 610. guide groove A; 7. driving mechanism; 701. dual-axis motor; 702. mounting frame; 703. limiter groove 703; 704 , electric push rod; 705, bevel gear A; 706, moving gear; 707, fixed gear; 708, bevel gear B; 8, displacement mechanism; 801, worm B; 802, worm wheel B; 803, support shaft; 804, toothed disc; 805, toothed plate; 806, displacement frame; 807, support block; 808, support groove; 809, guide rod B; 810, guide groove B; 811, support frame; 9, limiting mechanism; 901, limiting cylinder; 902, support spring; 903, limiting member B. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 and Fig.10 The present invention provides a technical solution: a land freeze-thaw wind erosion simulation measurement device, comprising a test box 1, a temperature controller 3 is symmetrically installed on the top of the inner side of the test box 1, a fan 2 is equidistantly installed on one side of the inner side of the test box 1, and a transparent cover 4 is arranged on the top of the test box 1;

[0037] See also Figure 1 and Fig.10 It can be seen that the sample frozen soil to be tested is placed on the top of the placement plate 5, and then the transparent cover is closed. At this time, multiple fans 2 are controlled to work simultaneously to simulate the wind and airflow in the natural environment, and cold air is continuously injected through the temperature controller 3 to ensure that the overall temperature in the device meets the test requirements.

[0038] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8-Figure 11It can be seen that a displacement mechanism 8 is provided at the bottom end of the inner side of the test box 1. The displacement mechanism 8 includes a displacement frame 806 movably connected to the test box 1. The inner side of the displacement frame 806 is connected to a support shaft 803 through a bearing, and a toothed disc 804 is equidistantly connected to the surface of the support shaft 803. A toothed plate 805 meshingly connected to the toothed disc 804 is equidistantly provided at the bottom end of the inner side of the test box 1. The end of the toothed disc 804 away from the support shaft 803 is connected to a worm gear B802. The top end of the worm gear B802 is meshingly connected to the toothed disc 804. There is a worm gear B801 rotatably connected to the support frame 811 through a bearing, the outer side of the displacement frame 806 is movably connected to the support frame 811, the front and rear ends of the support frame 811 are both provided with guide rods B809, and the inner surface of the test box 1 is symmetrically provided with guide grooves B810 matching the guide rods B809, the guide grooves B810 are composed of a combination of a plurality of straight grooves and oblique grooves, and the support frame 811 and the test box 1 form a sliding structure through the guide rods B809 and the guide grooves B810;

[0039] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8-Figure 11 It can be seen that when the moving gear 706 is meshed with the fixed gear 707, and the moving gear 706 drives the fixed gear 707 and the worm B801 to rotate, the worm wheel B802, the support shaft 803 and the toothed disc 804 rotate together. Since the toothed disc 804 is meshed and connected with the toothed plate 805, and the displacement frame 806 is slidably connected with the test box 1 through the support block 807 and the support groove 808, the toothed disc 804 and the displacement frame 806 drive the frozen soil to move horizontally, thereby changing the magnitude of the wind force on the frozen soil. Since the support frame 811 is slidably connected with the test box 1 through the guide groove B810 and the guide rod B809, the support frame 811 and the placement plate 5 can drive the frozen soil to move vertically back and forth, so as to simulate the dynamic interaction between the wind and the ground, such as wind speed fluctuations and wind direction changes, so as to more realistically reflect the wind speed fluctuations and wind direction changes. The erosion process of permafrost in the natural wind field is reflected, and the dynamic movement can disperse the erosion effect, reduce local excessive erosion, and make the results more universal. In addition, the vertical reciprocating movement can expose the permafrost surface evenly to the wind field, avoiding the concentrated erosion caused by long-term fixation at a single location, thereby more comprehensively evaluating the overall wind erosion resistance of the permafrost. At the same time, during the dynamic movement process, the permafrost surface may form micro-topography due to erosion, such as gullies and protrusions. The change in roughness will further change the wind field distribution and form a positive feedback effect. The test can be used to study the evolution of this process. Through the dynamic movement of permafrost and wind force regulation, the natural wind erosion environment can be simulated more realistically, revealing the erosion mechanism, failure mode and protection needs of permafrost under dynamic loads, and providing key data support for cold region engineering, ecological protection and climate change research.

[0040] See also Figure 1-Figure 3 , Figure 5, Figure 6 and Figure 8-Figure 10 It can be seen that a driving mechanism 7 is provided on one side of the support frame 811, and the driving mechanism 7 includes a mounting frame 702 movably connected to the support frame 811, and a limiting groove 703 forming a sliding structure with the mounting frame 702 is provided on one side of the support frame 811, and a double-axis motor 701 is installed inside the mounting frame 702, and one end of the double-axis motor 701 is slidably connected to a moving gear 706, and one side of the worm B801 is connected to a fixed gear 707 matching the moving gear 706, and the other end of the double-axis motor 701 is connected to a bevel gear A705, and one side of the bevel gear A705 is meshedly connected to a bevel gear B708, and an electric push rod 704 is installed between the mounting frame 702 and the support frame 811;

[0041] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8-Figure 10 It can be seen that since the mounting frame 702 is slidably connected to the support frame 811 through the limit groove 703, the mounting frame 702 can drive the dual-axis motor 701 to move in the vertical direction during the operation and extension of the electric push rod 704, so as to control the meshing and separation of the bevel gear A705 and the bevel gear B708 ​​as well as the movable gear 706 and the fixed gear 707. When the bevel gear A705 is meshed with the bevel gear B708 ​​and the dual-axis motor 701 is working, the slope adjustment mechanism 6 can be driven by the bevel gears A705 and B708 ​​to perform the frozen soil slope adjustment. In order to adjust the degree and direction of the frozen soil slope, when the moving gear 706 is meshed with the fixed gear 707 and the dual-axis motor 701 is working, the moving gear 706 and the fixed gear 707 can drive the displacement mechanism 8 to dynamically adjust the position of the frozen soil, so as to change the size of the wind force received by the frozen soil and improve the authenticity of the simulation. The linkage mechanism can ensure the continuity and accuracy of the test of the land freeze-thaw wind erosion simulation measurement device, and improve the test efficiency. A single dual-axis motor 701 is used to drive multiple mechanisms to operate, which reduces power consumption and saves resources and costs.

[0042] See also Figure 1-Figure 5 and Fig.10As known, a placement plate 5 is arranged above the support frame 811, and a slope adjustment mechanism 6 is arranged between the placement plate 5 and the support frame 811. The slope adjustment mechanism 6 includes a rotating column 603 connected to the support frame 811 through a bearing, a support frame A607 rotatably connected to the placement plate 5 through a hinge seat is movably connected to the outer side of one rotating column 603, and a support frame B608 movably connected to the placement plate 5 is movably connected to the outer side of the other rotating column 603. A spiral groove 605 is opened on the outer surface of the rotating column 603, and the two spiral grooves 605 are arranged in opposite directions. The inner sides of the support frames A607 and B608 are both provided with spiral grooves. The groove 605 constitutes a limiter A606 of a sliding structure, a guide groove A610 is symmetrically provided at one end of the placement plate 5 close to the support frame A607, a guide rod A609 which forms a sliding structure with the guide groove A610 is symmetrically provided at the top of the support frame A607, a pulley group 604 is sleeved on the outer surfaces of the two rotating columns 603, a worm wheel A602 is provided on the outer surface of one rotating column 603 below the pulley group 604, a worm gear A601 which is rotatably connected to the support frame 811 through a bearing is meshedly connected to one side of the worm gear A602, and an end of the worm gear A601 away from the worm gear A602 is connected to the bevel gear B708;

[0043] See also Figure 2-Figure 5 and Fig.10 It can be seen that when the bevel gear A705 is meshed with the bevel gear B708, and the bevel gear A705 drives the bevel gear B708 ​​and the worm A601 to rotate, the worm gear A602 rotates together, and the two rotating columns 603 rotate together under the action of the pulley group 604. Since the support frame A607, the support frame B608 and the rotating column 603 are all slidably connected through the spiral groove 605 and the limiter A606, the support frame A607 and the support frame B608 are both moved in the vertical direction. Since the two spiral grooves 605 are set in opposite directions, and the support The support frame A607 is slidably connected to the placement plate 5, and the support frame B608 is rotationally connected to the placement plate 5 through a hinge seat, so that the support frame A607 and the support frame B608 move in opposite directions in the vertical direction, thereby realizing automatic and precise adjustment of the placement plate 5 and the slope of the frozen soil. By adjusting the slope of the frozen soil in this way, the direction of the frozen soil slope can be adjusted at the same time, and there is no need to perform additional steps to adjust the slope direction of the frozen soil, thereby effectively reducing one adjustment process, which not only simplifies the operating process, but also significantly improves the efficiency of the testing work.

[0044] See also Figure 2 , Figure 6 and Fig.11It can be seen that a support block 807 is symmetrically arranged at the bottom end of the displacement frame 806, and a support groove 808 is symmetrically opened at the bottom end of the inner side of the test box 1 to form a sliding structure with the support block 807, which can play a role in supporting and limiting the displacement frame 806, so that the displacement frame 806 can move in the horizontal direction to prevent deviation and tilt.

[0045] See also Figure 2 , Figure 7 , Figure 8 and Fig.11 It can be seen that a limiting mechanism 9 is provided on one side of the bottom end of the support frame 811, and the limiting mechanism 9 includes a limiting cylinder 901 welded to the support frame 811, and a limiting member B903 is slidably connected to one side of the limiting cylinder 901, and a supporting spring 902 is connected between the limiting member B903 and the limiting cylinder 901, and the top and bottom ends of the limiting member B903 near the moving gear 706 are both provided with inclined surfaces;

[0046] See also Figure 7 , Figure 8 and Fig.11 It can be known that in the process of meshing of the moving gear 706 and the fixed gear 707, the inclined surface of the limit member B903 will abut against the top of the moving gear 706 under the action of the support spring 902, so that when the support frame 811 and the placement plate 5 drive the frozen soil to move vertically back and forth, the moving gear 706 and the fixed gear 707 always remain in a meshing state, and when the electric push rod 704 works and contracts, the moving gear 706 can be moved vertically upward and squeeze the limit member B903 until the moving gear 706 moves above the limit member B903, and the vertical upward movement distance is greater than the distance when the support frame 811 moves vertically back and forth.

[0047] Working principle: When using the land freeze-thaw wind erosion simulation measurement device, place the sample frozen soil to be tested on the top of the placement plate 5, then close the transparent cover, and when it is necessary to test the influence of different contact angles between the sample frozen soil and the airflow, make the electric push rod 704 work and retract, and through the sliding action of the mounting frame 702 and the support frame 811, the mounting frame 702 drives the dual-axis motor 701 to move in the vertical direction, so that the bevel gear A705 is meshed with the bevel gear B708, and then the dual-axis motor 701 is started, so that the output end of the dual-axis motor 701 drives the bevel gear A705 and the bevel gear B708 ​​to mesh. The wheel B708 ​​and the worm A601 rotate, and the worm wheel A602 rotates together through the meshing action of the worm wheel A602 and the worm A601, and the two rotating columns 603 rotate together under the action of the pulley group 604, and the supporting frame A607, the supporting frame B608 and the rotating column 603 slide, so that the supporting frame A607 and the supporting frame B608 move in the reverse direction in the vertical direction, so as to realize the automatic and precise adjustment of the placement plate 5 and the frozen soil slope and the frozen soil slope direction. At this time, by controlling multiple fans 2 to work simultaneously, it is used to simulate the wind force and airflow in the natural environment;

[0048] When it is necessary to test the influence of different contact distances and heights between the frozen soil of the sample and the airflow, the electric push rod 704 is operated and extended, and the mounting frame 702 drives the dual-axis motor 701 to move in the vertical direction through the sliding action of the mounting frame 702 and the supporting frame 811, so that the moving gear 706 is meshed with the fixed gear 707. At this time, the dual-axis motor 701 is started, so that the output end of the dual-axis motor 701 drives the moving gear 706, the fixed gear 707 and the worm B801 to rotate, and through the meshing action of the worm wheel B802 and the worm B801, the moving gear 706, the fixed gear 707 and the worm B801 are meshed. The worm gear B802, the support shaft 803 and the toothed disc 804 rotate together. Through the meshing action of the toothed disc 804 and the toothed plate 805, the toothed disc 804 and the displacement frame 806 drive the frozen soil to move horizontally, thereby changing the magnitude of the wind force on the frozen soil. At the same time, through the sliding action of the support frame 811 and the test box 1, the support frame 811 and the placement plate 5 can drive the frozen soil to move vertically back and forth, so as to simulate the dynamic interaction of the natural wind field, disperse the erosion effect, and combine the micro-topography evolution observation to reveal the positive feedback mechanism of wind erosion and improve the universality of data.

[0049] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A land freeze-thaw wind erosion simulation measurement device, comprising a test box (1), a temperature controller (3) is symmetrically installed on the top of the inner side of the test box (1), a fan (2) is equidistantly installed on one side of the inner side of the test box (1), and a transparent cover (4) is arranged on the top of the test box (1); the characteristics are: A displacement mechanism (8) is provided at the bottom end of the inner side of the test box (1), and the displacement mechanism (8) comprises a displacement frame (806) movably connected to the test box (1); the inner side of the displacement frame (806) is connected to a support shaft (803) via a bearing, and a toothed disc (804) is equidistantly connected to the surface of the support shaft (803); the end of the toothed disc (804) away from the support shaft (803) is connected to a worm gear B (802); the outer side of the displacement frame (806) is movably connected to a support frame (811), and the front and rear ends of the support frame (811) are both provided with guide rods B (809); and the inner surface of the test box (1) is symmetrically provided with guide grooves B (810) matching the guide rods B (809); A driving mechanism (7) is arranged on one side inside the supporting frame (811), the driving mechanism (7) comprising a mounting frame (702) movably connected to the supporting frame (811), a double-axis motor (701) is installed inside the mounting frame (702), one end of the double-axis motor (701) is slidably connected to a moving gear (706), the other end of the double-axis motor (701) is connected to a bevel gear A (705), and an electric push rod (704) is installed between the mounting frame (702) and the supporting frame (811); A placement plate (5) is arranged above the support frame (811), and a slope adjustment mechanism (6) is arranged between the placement plate (5) and the support frame (811). The slope adjustment mechanism (6) includes a rotating column (603) connected to the support frame (811) via a bearing, an outer side of one of the rotating columns (603) is movably connected to a support frame A (607) rotatably connected to the placement plate (5) via a hinge seat, and an outer side of the other rotating column (603) is movably connected to a support frame B (608) movably connected to the placement plate (5).

2. A land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: A toothed plate (805) meshingly connected to a toothed disc (804) is equidistantly arranged at the bottom of the inner side of the test box (1); a worm B (801) rotatably connected to a support frame (811) via a bearing is meshedly connected to the top of the worm wheel B (802); and a fixed gear (707) matching the movable gear (706) is connected to one side of the worm B (801).

3. A land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: The guide groove B (810) is composed of a plurality of straight grooves and oblique grooves, and the support frame (811) and the test box (1) form a sliding structure through the guide rod B (809) and the guide groove B (810).

4. A land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: A support block (807) is symmetrically arranged at the bottom end of the displacement frame (806), and a support groove (808) forming a sliding structure with the support block (807) is symmetrically opened at the bottom end of the inner side of the test box (1).

5. The land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: A limiting groove 703 (703) is provided on one side of the interior of the support frame (811) and forms a sliding structure with the mounting frame (702), and a bevel gear B (708) is meshedly connected to one side of the bevel gear A (705).

6. The land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: The outer surface of the rotating column (603) is provided with a spiral groove (605), and the two spiral grooves (605) are arranged in opposite directions. The inner sides of the support frame A (607) and the support frame B (608) are both provided with a limiting member A (606) that forms a sliding structure with the spiral groove (605).

7. The land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: A guide groove A (610) is symmetrically provided at one end of the placement plate (5) close to the support frame A (607), and a guide rod A (609) is symmetrically provided at the top of the support frame A (607) to form a sliding structure with the guide groove A (610).

8. The land freeze-thaw wind erosion simulation measurement device according to claim 5, characterized in that: The outer surfaces of the two rotating columns (603) are sleeved with a pulley group (604), and the outer surface of one rotating column (603) is provided with a worm wheel A (602) below the pulley group (604), one side of the worm wheel A (602) is meshedly connected with a worm A (601) rotatably connected to the support frame (811) via a bearing, and the end of the worm wheel A (601) away from the worm wheel A (602) is connected to a bevel gear B (708).

9. The land freeze-thaw wind erosion simulation measurement device according to claim 1, characterized in that: A limiting mechanism (9) is provided on one side of the bottom end of the support frame (811), and the limiting mechanism (9) comprises a limiting cylinder (901) welded to the support frame (811), and one side inside the limiting cylinder (901) is slidably connected to a limiting member B (903).

10. A land freeze-thaw wind erosion simulation measurement device according to claim 9, characterized in that: A support spring (902) is connected between the limiting member B (903) and the limiting cylinder (901), and the top and bottom ends of the limiting member B (903) close to the movable gear (706) are both provided with inclined surfaces.

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