A snowfall device for wind tunnel tests

Abstract

The present invention relates to the technical field of construction engineering, and discloses a snowfall device for wind tunnel tests, which includes a support frame and a lifting frame. The lifting frame is slidably fitted along the height direction of the support frame and is arranged on the support frame. A snow storage box that penetrates up and down is movably connected to the lifting frame. A first partition net is fixedly connected to the inner side wall of the snow storage box. An opening and closing mechanism is arranged at the bottom opening of the snow storage box. A first driving mechanism for driving the snow storage box to shake is also arranged on the lifting frame. A perforated plate is detachably connected to the lifting frame. A second driving mechanism for driving the perforated plate to vibrate is also arranged on the lifting frame. A translation mechanism is also arranged on the lifting frame. An image acquisition device is slidably fitted on the translation mechanism, and the image acquisition device can move to any point within the plane range of the translation mechanism; a mounting plate is arranged below the lifting frame, and a test plate with geomorphic features is detachably connected to the mounting plate. The present invention can conduct continuous and high-efficiency snowfall simulation experiments.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly to a snowfall device for wind tunnel tests. Background Art

[0002] Snowfall is a common natural phenomenon. When the snowfall amount is too large, it will bring snow disasters and cause many inconveniences to humans, and even endanger life and property safety. Natural snowfall is often accompanied by the action of wind. Under the combined action of wind and snow, it will cause a large amount of economic losses and even threaten life safety. In recent years, there has been a wave of research on wind and snow movement in the field of civil engineering. Snowfall is an important link in the wind tunnel experiment of wind and snow movement.

[0003] The existing snowfall devices for wind tunnel tests usually place artificially prepared snow in a snowfall cylinder at a temperature of -20°C in the laboratory. The scraper rotates slowly, and the snow is swept out through the small holes of the porous plate and falls naturally to form a snowfall effect. However, during the simulation process, the snow in the snowfall cylinder and the snow passing through the porous plate are extremely easy to be blocked, resulting in a reduction in the use efficiency of the snowfall cylinder and the porous plate, thus affecting the wind tunnel experiment effect of wind and snow movement. Summary of the Invention

[0004] The purpose of the present invention is to provide a snowfall device for wind tunnel tests, aiming to solve or improve at least one of the above technical problems.

[0005] To achieve the above purpose, the present invention provides the following solutions: The present invention provides a snowfall device for wind tunnel tests, including:

[0006] A support frame;

[0007] A lifting frame, which is slidably fitted on the support frame along the height direction of the support frame. A snow storage box that penetrates up and down is movably connected to the lifting frame. A first partition net is fixedly connected to the inner side wall of the snow storage box. An opening and closing mechanism is arranged at the bottom opening of the snow storage box. A first driving mechanism for driving the snow storage box to shake is further arranged on the lifting frame. A porous plate is detachably connected to the lifting frame. A second driving mechanism for driving the porous plate to vibrate is further arranged on the lifting frame. A translation mechanism is further arranged on the lifting frame. An image acquisition device is slidably fitted on the translation mechanism, and the image acquisition device can move to any point within the plane range of the translation mechanism;

[0008] A mounting plate, which is arranged below the lifting frame. A test plate with geomorphic features is detachably connected to the mounting plate.

[0009] Optionally, the first driving mechanism includes a first motor, a cam, and a guiding frame. The first motor is fixedly installed on the lifting frame, the output end of the first motor is in transmission connection with the cam, the guiding frame is fixedly connected to the snow storage box, the cam is arranged in the guiding frame and abuts against the inner side wall of the guiding frame, and a plurality of first guiding rods are fixedly connected to both ends of the snow storage box respectively. The first guiding rods are slidably connected to the lifting frame, and a first spring is fixedly connected between the first guiding rods and the lifting frame.

[0010] Optionally, the second driving mechanism includes a pair of first connecting plates. The pair of first connecting plates are respectively detachably connected to both ends of the porous plate. A first vibrating device is fixedly installed on the first connecting plate, and a second guiding rod is fixedly connected to the first connecting plate. The second guiding rod is slidably connected to the lifting frame, and a second spring is fixedly connected between the second guiding rod and the lifting frame.

[0011] Optionally, the opening and closing mechanism includes a plurality of opening and closing plates and a third motor. The plurality of opening and closing plates are arranged side by side at the bottom opening of the snow storage box. The opening and closing plates are rotatably connected to the snow storage box through a first shaft rod. One end of the first shaft rod extends out of the snow storage box and is fixedly connected to a worm gear. The third motor is fixedly installed on the snow storage box. The output shaft of the third motor is in transmission connection with a transmission rod. A plurality of coaxial worm gears are arranged on the transmission rod. The plurality of worm gears correspond to and mesh with the plurality of worm gears one by one.

[0012] Optionally, the translation mechanism includes a pair of first electric slide rails and a second electric slide rail. The pair of first electric slide rails are fixedly installed on the lifting frame. The second electric slide rail is slidably connected to the slider ends of the pair of first electric slide rails. The second electric slide rail is perpendicular to the first electric slide rails. The image acquisition device is arranged on the slider end of the second electric slide rail.

[0013] Optionally, a pair of fourth motors are fixedly installed on the support frame. The output ends of the fourth motors are in transmission connection with screw rod assemblies. The pair of screw rod assemblies are respectively in transmission cooperation with both ends of the lifting frame.

[0014] Optionally, the support frame is fixedly connected with a funnel-shaped collection box. The collection box is located below the installation plate. The planar size of the collection box is larger than the planar size of the plurality of installation plates. A second vibrating device is arranged on the collection box. The bottom opening of the collection box is communicated with an inclined concentration box. The bottom end of the concentration box is communicated with a plurality of transmission pipes. One end of the transmission pipe far away from the concentration box is communicated with the inlet of a negative pressure device. The outlet of the negative pressure device is communicated with a discharge pipe. One end of the discharge pipe far away from the negative pressure device is connected with a corrugated expansion pipe. The corrugated expansion pipe extends into the snow storage box and is connected with the lifting frame.

[0015] Optionally, a plurality of through holes are formed at one end of the collection box, a second partition net is arranged in the through holes, and the through holes face the bottom end of the centralized box.

[0016] Optionally, a pair of fourth electric slide rails are fixedly installed on the support frame, the slider end of the fourth electric slide rail is fixedly connected with a third electric slide rail, the fourth electric slide rail is perpendicular to the third electric slide rail, the slider end of the third electric slide rail is fixedly connected with a second connecting plate, a second shaft rod is rotatably connected between a pair of the second connecting plates, one end of the second shaft rod is drivingly connected with a fifth motor, the fifth motor is fixedly installed on any of the second connecting plates, and a third vibration device and a plurality of mounting holes are arranged on the mounting plate.

[0017] Optionally, the bottom end of the support frame is connected with a plurality of universal wheels with self-locking devices.

[0018] The present invention discloses the following technical effects: by adjusting the height position of the lifting frame on the support frame, it has extremely high adaptability to meet different height simulation requirements. By putting snow into the snow storage box, first, the snow is pre-supported by the first partition net, and the opening and closing mechanism is opened. At the same time, the first driving mechanism drives the snow storage box to shake, so that the snow on the first partition net is evenly laid and gradually passes through the first partition net and is discharged from the snow storage box onto the porous plate. At the same time, the second driving mechanism drives the porous plate to vibrate, vibrating the snow on the porous plate, so that the porous plate evenly scatters the snow downward, and it can also prevent too much snow from accumulating on the porous plate, thereby enabling a continuous and high-efficiency snowfall simulation experiment. After the experiment is completed, the image acquisition device is driven by the translation mechanism to scan the snowfall distribution state on the test plate, meeting the all-round data acquisition after the experiment. Description of the Drawings

[0019] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a bottom view of the lifting frame of the present invention;

[0022] Figure 3 is Figure 2 a partial enlarged view of A in

[0023] Figure 4 is a sectional view of the snow storage box of the present invention;

[0024] Figure 5 is Figure 4Partial enlarged view of B in;

[0025] Figure 6 Bottom view of the mounting plate of the present invention;

[0026] Figure 7 Cross-sectional view of the collection box of the present invention;

[0027] Figure 8 is Figure 7 Partial enlarged view of C in.

[0028] In the figure: 1, support frame; 2, lifting frame; 3, snow storage box; 4, first partition net; 5, opening and closing mechanism; 51, opening and closing plate; 52, third motor; 53, first shaft rod; 54, worm gear; 55, transmission rod; 56, worm; 6, first driving mechanism; 61, first motor; 62, cam; 63, guiding frame; 64, first guiding rod; 65, first spring; 7, perforated plate; 8, second driving mechanism; 81, first connecting plate; 82, first vibrating device; 83, second guiding rod; 84, second spring; 9, translation mechanism; 91, first electric slide rail; 92, second electric slide rail; 10, image acquisition device; 11, mounting plate; 13, fourth motor; 14, screw rod assembly; 15, collection box; 16, second vibrating device; 17, centralized box; 18, transmission pipeline; 19, negative pressure device; 20, discharge pipeline; 21, corrugated expansion pipe; 22, through hole; 23, second partition net; 24, third electric slide rail; 25, second connecting plate; 26, second shaft rod; 27, fifth motor; 28, third vibrating device; 29, mounting hole; 30, universal wheel; 31, fourth electric slide rail. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0031] Referring to Figures 1-8 , the present invention provides a snowfall device for wind tunnel tests, including:

[0032] Support frame 1;

[0033] The lifting frame 2 is slidably fitted along the height direction of the support frame 1 and is arranged on the support frame 1. A snow storage box 3 that penetrates up and down is movably connected to the lifting frame 2. A first partition net 4 is fixedly connected to the inner side wall of the snow storage box 3. An opening and closing mechanism 5 is arranged at the bottom opening of the snow storage box 3. A first driving mechanism 6 for driving the snow storage box 3 to shake is further arranged on the lifting frame 2. A perforated plate 7 is detachably connected to the lifting frame 2. A second driving mechanism 8 for driving the perforated plate 7 to vibrate is further arranged on the lifting frame 2. A translation mechanism 9 is further arranged on the lifting frame 2. An image acquisition device 10 is slidably fitted on the translation mechanism 9, and the image acquisition device 10 can move to any point within the plane range of the translation mechanism 9;

[0034] The mounting plate 11 is arranged below the lifting frame 2, and a test plate with topographic features is detachably connected to the mounting plate 11.

[0035] By adjusting the height position of the lifting frame 2 on the support frame 1, it has extremely high adaptability to meet different height simulation requirements. By putting snow into the snow storage box 3, first, the first partition net 4 pre-supports the snow, and the opening and closing mechanism is opened. At the same time, the first driving mechanism 6 drives the snow storage box 3 to shake, so that the snow on the first partition net 4 is evenly laid and can gradually pass through the first partition net 4 and be discharged from the snow storage box 3 to the perforated plate 7. At the same time, the second driving mechanism 8 drives the perforated plate 7 to vibrate, vibrating the snow on the perforated plate 7, so that the perforated plate 7 evenly scatters the snow downward, and it can also prevent more snow from accumulating on the perforated plate 7. Thus, a continuous and high-efficiency snowfall simulation experiment can be carried out. After the experiment is completed, the translation mechanism 9 drives the image acquisition device 10 to scan the snowfall distribution state on the test plate to meet the all-round data acquisition after the experiment.

[0036] In a further optimized solution, the first driving mechanism 6 includes a first motor 61, a cam 62, and a guide frame 63. The first motor 61 is fixedly installed on the lifting frame 2, the output end of the first motor 61 is in transmission connection with the cam 62, the guide frame 63 is fixedly connected to the snow storage box 3, the cam 62 is arranged in the guide frame 63 and abuts against the inner side wall of the guide frame 63, and a plurality of first guide rods 64 are respectively fixedly connected to both ends of the snow storage box 3. The first guide rods 64 are slidably connected to the lifting frame 2, and a first spring 65 is fixedly connected between the first guide rods 64 and the lifting frame 2.

[0037] The first motor 61 drives the cam 62 to rotate, so that the cam 62 reciprocally pushes the guide frame 63. Due to the cooperation of the plurality of first guide rods 64 and the first spring 65, the snow storage box 3 can be reciprocally shaken, and then the effect that the snow on the first partition net 4 is evenly laid and can gradually pass through the first partition net 4 and be discharged from the snow storage box 3 to the perforated plate 7 is achieved.

[0038] For a further optimized solution, the second driving mechanism 8 includes a pair of first connecting plates 81. The pair of first connecting plates 81 are respectively detachably connected (preferably by bolts) to both ends of the porous plate 7. A first vibration device 82 is fixedly installed on the first connecting plate 81, and a second guiding rod 83 is fixedly connected to the first connecting plate 81. The second guiding rod 83 is slidably connected to the lifting frame 2, and a second spring 84 is fixedly connected between the second guiding rod 83 and the lifting frame 2.

[0039] Through the guiding and supporting of the first connecting plate 81 by the second guiding rod 83 and the second spring 84, when the first vibration device 82 vibrates, the porous plate 7 is caused to vibrate, thereby preventing a large amount of snow from accumulating on the porous plate.

[0040] Further, the porous plate 7 is box-shaped, so as to prevent the snow on it from falling off the porous plate 7 during vibration.

[0041] Further, the snowfall flow rate can be adjusted by replacing the porous plate 7 with different pore diameters.

[0042] For a further optimized solution, the opening and closing mechanism 5 includes a plurality of opening and closing plates 51 and a third motor 52. The plurality of opening and closing plates 51 are arranged side by side at the bottom opening of the snow storage box 3. The opening and closing plate 51 is rotatably connected to the snow storage box 3 through a first shaft rod 53. One end of the first shaft rod 53 extends out of the snow storage box 3 and is fixedly connected with a worm gear 54. The third motor 52 is fixedly installed on the snow storage box 3. The output shaft of the third motor 52 is drivingly connected with a transmission rod 55. A plurality of coaxial worm shafts 56 are arranged on the transmission rod 55. The plurality of worm shafts 56 correspond to and mesh with the plurality of worm gears 54 one by one.

[0043] By driving the transmission rod 55 to rotate through the third motor 52, the plurality of worm shafts 56 on the transmission rod 55 drive the plurality of worm gears 54 to rotate synchronously, so that the first shaft rod 53 drives the opening and closing plate 51 to flip, thereby realizing the opening and closing of the bottom opening of the snow storage box 3.

[0044] For a further optimized solution, the translation mechanism 9 includes a pair of first electric slide rails 91 and a second electric slide rail 92. The pair of first electric slide rails 91 are fixedly installed on the lifting frame 2. The second electric slide rail 92 is slidably connected to the slider ends of the pair of first electric slide rails 91. The second electric slide rail 92 is perpendicular to the first electric slide rails 91. An image acquisition device 10 is arranged on the slider end of the second electric slide rail 92.

[0045] By sliding the second electric slide rail 92 along the first electric slide rails 91 and driving the image acquisition device 10 to slide by the second electric slide rail 92, the adjustable image acquisition device 10 can be moved to any point within the plane range of the translation mechanism 9, so that the image acquisition device 10 can perform an all-round scan of the test plate.

[0046] For a further optimized solution, a pair of fourth motors 13 are fixedly installed on the support frame 1. The output end of the fourth motor 13 is drivingly connected to a lead screw assembly 14, and the pair of lead screw assemblies 14 are respectively in driving cooperation with both ends of the lifting frame 2.

[0047] The lifting of the lifting frame 2 is realized by driving the lead screw assembly 14 through the fourth motor 13. The setting of the pair of lead screw assemblies 14 can improve the sliding stability of the lifting frame 2.

[0048] For a further optimized solution, the support frame 1 is fixedly connected with a funnel-shaped collection box 15. The collection box 15 is located below the mounting plate 11. The planar size of the collection box 15 is larger than the planar sizes of the multiple mounting plates 11. A second vibration device 16 is arranged on the collection box 15. The bottom opening of the collection box 15 is communicated with an inclined concentration box 17. The bottom end of the concentration box 17 is communicated with a plurality of transmission pipes 18. One end of the transmission pipe 18 far away from the concentration box 17 is communicated with the inlet of a negative pressure device 19. The outlet of the negative pressure device 19 is communicated with a discharge pipe 20. One end of the discharge pipe 20 far away from the negative pressure device 19 is connected with a corrugated expansion pipe 21. The corrugated expansion pipe 21 extends into the snow storage box 3 and is connected with the lifting frame 2.

[0049] The funnel-shaped collection box 15 is used to collect the snow that has not fallen onto the mounting plate during the snowfall simulation process. With the vibration effect generated by the collection box 15 in cooperation with the second vibration device 16, the snow is concentrated into the concentration box 17. Thus, the negative pressure device 19 transmits the snow in the concentration box 17 to the discharge pipe 20 through the transmission pipe 18 by negative pressure, and the snow is discharged into the snow storage box 3 by the corrugated expansion pipe 21, realizing the automatic recycling of the snow. At the same time, by setting the corrugated expansion pipe 21, the position state between the port of the corrugated expansion pipe 21 and the snow storage box 3 can be maintained.

[0050] For a further optimized solution, a plurality of through holes 22 are formed at one end of the collection box 15. A second partition net 23 is arranged in the through holes 22. The through holes 22 face the bottom end of the concentration box 17.

[0051] By setting the through holes 22, the wind generated in the wind tunnel can be utilized, introduced through the through holes 22 and blown towards the bottom end of the concentration box 17. When the snow is blown towards the transmission pipe 18 at the bottom end of the concentration box 17, the snow is sucked in by the transmission pipe 18, improving the recycling efficiency of the snow.

[0052] For a further optimized solution, a pair of fourth electric slide rails 31 are fixedly installed on the support frame 1. The slider end of the fourth electric slide rail 31 is fixedly connected to a third electric slide rail 24. The fourth electric slide rail 31 is perpendicular to the third electric slide rail. The slider end of the third electric slide rail 24 is fixedly connected to a second connecting plate 25. A second shaft rod 26 is rotatably connected between a pair of second connecting plates 25. One end of the second shaft rod 26 is drivingly connected to a fifth motor 27. The fifth motor 27 is fixedly installed on any second connecting plate 25. And a third vibration device 28 and a plurality of mounting holes 29 are provided on the mounting plate 11.

[0053] By driving the third electric slide rail 24 to slide through the fourth electric slide rail 31 and driving the second connecting plate 25 to slide through the third electric slide rail 24, and cooperating with the fifth motor 27 to drive the second shaft rod 26 to rotate, the mounting plate 11 is flipped, so that the mounting plate 11 can maintain multi-angle states and position switching, so as to adapt to the requirements of test plates of different sizes and landforms installed on the mounting plate 11 and different-angle experiments. And after the snowfall simulation is over, the fifth motor 27 can be used to drive the second shaft rod 26 to rotate, so that the mounting plate 11 is flipped to a suitable angle, and cooperating with the third vibration device 28 to make the mounting plate 11 vibrate, so as to effectively dump the snow on the test plate into the collection frame 15, saving a large amount of manpower and material resources.

[0054] For a further optimized solution, a plurality of universal wheels 30 with self-locking devices are connected to the bottom end of the support frame 1.

[0055] Furthermore, the present invention further includes a processor and a control device. The processor can perform calculation and processing based on the characteristic data in the simulated snowfall test, and intelligently analyze whether parameters such as snowfall flow rate, wind force magnitude, and wind direction angle meet the requirements of the current test conditions. The analysis result transmits corresponding instructions to the control device. The central processor is connected to the control device through a bus or other means. The control device is connected to the third motor 52, the first motor 61, the first vibration device 82, the first electric slide rail 91, the second electric slide rail 92, the image acquisition device 10, the fourth motor 13, the second vibration device 16, the negative pressure device 19, the third electric slide rail 24, the fifth motor 27, and the third vibration device 28, realizing fully intelligent remote operation and automatically adjusting the start and end of the required simulated snowfall state according to test or site requirements.

[0056] Further, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., or a combination of the above types of chips.

[0057] Further, the test board and the mounting board 11 are connected by bolts.

[0058] Experimental steps:

[0059] First, before the test, the image acquisition device 10 can perform an omnidirectional scanning process on the test board that requires data capture according to the instructions issued by the processor; second, after the snowfall simulation test is completed, the surface topography features of the test board are collected according to the corresponding instructions, and the data obtained before and after the test are compared and processed for intelligent analysis.

[0060] The data acquisition process of the image acquisition device 10 will be fed back to the processor in real time. The processor can perform intelligent analysis based on the information data captured by the image acquisition device 10 in real time, and control the first electric slide rail 91 and the second electric slide rail 92 to move the image acquisition device 10 to achieve the horizontal and vertical movement of the laser acquisition instrument, so as to ensure 360-degree omnidirectional information capture.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0062] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A snowfall device for wind tunnel testing, characterized in that: include: Support frame (1); A lifting frame (2) is slidably engaged with the support frame (1) in the height direction of the support frame (1), a snow storage box (3) which is movably connected to the lifting frame (2) and is connected vertically, a first partition net (4) is fixedly connected to the inner wall of the snow storage box (3), an opening and closing mechanism (5) is arranged at the bottom of the snow storage box (3), a first driving mechanism (6) for driving the snow storage box (3) to shake is also arranged on the lifting frame (2), and a perforated plate (7) is detachably connected to the lifting frame (2). The snow storage box (3) is located above the porous plate (7), the bottom of the snow storage box (3) is spaced apart from the top surface of the porous plate (7), the lifting frame (2) is also provided with a second driving mechanism (8) for driving the porous plate (7) to vibrate, the lifting frame (2) is also provided with a translation mechanism (9), the translation mechanism (9) is slidably fitted with an image acquisition device (10), and the image acquisition device (10) can be moved to any point within the plane range of the translation mechanism (9); A mounting plate (11) is arranged below the lifting frame (2), and a test plate with landform features is detachably connected to the mounting plate (11).

2. A snowfall device for wind tunnel testing according to claim 1, characterized in that: The first driving mechanism (6) comprises a first motor (61), a cam (62) and a guide frame (63); the first motor (61) is fixedly mounted on the lifting frame (2); the output end of the first motor (61) is transmission-connected to the cam (62); the guide frame (63) is fixedly connected to the snow storage box (3); the cam (62) is arranged in the guide frame (63) and abuts against the inner wall of the guide frame (63); and a plurality of first guide rods (64) are fixedly connected to both ends of the snow storage box (3); the first guide rods (64) are slidably connected to the lifting frame (2); and a first spring (65) is fixedly connected between the first guide rods (64) and the lifting frame (2).

3. The snowfall device for wind tunnel testing according to claim 1, characterized in that: The second driving mechanism (8) comprises a pair of first connecting plates (81), the pair of first connecting plates (81) being detachably connected to two ends of the perforated plate (7), a first vibrating device (82) being fixedly mounted on the first connecting plates (81), and a second guide rod (83) being fixedly connected to the first connecting plates (81), the second guide rod (83) being slidably connected to the lifting frame (2), and a second spring (84) being fixedly connected between the second guide rod (83) and the lifting frame (2).

4. The snowfall device for wind tunnel testing according to claim 1, characterized in that: The opening and closing mechanism (5) comprises a plurality of opening and closing plates (51) and a third motor (52). The plurality of opening and closing plates (51) are arranged side by side at the bottom of the snow storage box (3). The opening and closing plates (51) are rotatably connected to the snow storage box (3) via a first shaft (53). One end of the first shaft (53) extends out of the snow storage box (3) and is fixedly connected to a worm gear (54). The third motor (52) is fixedly mounted on the snow storage box (3). The output shaft of the third motor (52) is transmission-connected to a transmission rod (55). The transmission rod (55) is provided with a plurality of coaxial worm gears (56). The plurality of worm gears (56) correspond to and mesh with the plurality of worm gears (54) one by one.

5. The snowfall device for wind tunnel test according to claim 1, characterized in that: The translation mechanism (9) comprises a pair of first electric slide rails (91) and a second electric slide rail (92); the pair of first electric slide rails (91) are fixedly mounted on the lifting frame (2); the second electric slide rails (92) are slidably connected to the slider ends of the pair of first electric slide rails (91); the second electric slide rails (92) are perpendicular to the first electric slide rails (91); and the image acquisition device (10) is arranged on the slider end of the second electric slide rail (92).

6. The snow-reducing device for wind tunnel testing according to claim 1, characterized in that: A pair of fourth motors (13) are fixedly mounted on the support frame (1), and the output ends of the fourth motors (13) are transmission-connected to a screw assembly (14), and the pair of screw assemblies (14) are respectively transmission-matched with two ends of the lifting frame (2).

7. The snowfall device for wind tunnel testing according to claim 1, characterized in that: The support frame (1) is fixedly connected to a funnel-shaped collecting frame (15). The collecting frame (15) is located below the mounting plate (11). The plane size of the collecting frame (15) is larger than the plane sizes of the plurality of mounting plates (11). A second vibrating device (16) is arranged on the collecting frame (15). The bottom opening of the collecting frame (15) is connected to an inclined centralizing box (17). The bottom end of the centralizing box (17) is connected to a plurality of transmission pipes (18). One end of the transmission pipe (18) away from the centralizing box (17) is connected to an inlet of a negative pressure device (19). The outlet of the negative pressure device (19) is connected to a discharge pipe (20). One end of the discharge pipe (20) away from the negative pressure device (19) is connected to a bellows telescopic pipe (21). The bellows telescopic pipe (21) extends into the snow storage box (3) and is connected to the lifting frame (2).

8. The snow-reducing device for wind tunnel testing according to claim 7, characterized in that: A plurality of through holes (22) are provided at one end of the collection frame (15), a second partition net (23) is arranged in the through holes (22), and the through holes (22) face the bottom end of the concentration box (17).

9. The snowfall device for wind tunnel test according to claim 1, characterized in that: A pair of fourth electric slide rails (31) are fixedly mounted on the support frame (1); a slider end of the fourth electric slide rail (31) is fixedly connected to a third electric slide rail (24); the fourth electric slide rail (31) is perpendicular to the third electric slide rail; a slider end of the third electric slide rail (24) is fixedly connected to a second connecting plate (25); a second shaft rod (26) is rotatably connected between the pair of second connecting plates (25); one end of the second shaft rod (26) is transmission-connected to a fifth motor (27); the fifth motor (27) is fixedly mounted on any of the second connecting plates (25); and a third vibration device (28) and a plurality of mounting holes (29) are provided on the mounting plate (11).

10. The snowfall device for wind tunnel test according to claim 1, characterized in that: The bottom end of the support frame (1) is connected to a plurality of universal wheels (30) with self-locking devices.

Images