Sudden Wind Simulation Test Device

Abstract

This application discloses a sudden wind simulation test device, including a frame, plate units, a transmission mechanism, and a drive unit. The frame includes a top frame, a bottom frame, and side frames, which enclose a space. Plate units are installed on the top frame and the bottom frame, respectively, and are symmetrically arranged within the space of the frame. The output end of the drive unit is connected to the transmission mechanism, and the output end of the transmission mechanism is hinged to the two plate units to control the opening or closing of the two plate units in the direction of the incoming wind. The above-mentioned sudden wind simulation test device has a simple structure, realizes the simulation of sudden winds in extreme weather, is suitable for any conventional wind tunnel, provides good wind field quality, and improves the accuracy and precision of the test.

Description

Technical Field

[0001] This application relates to the field of wind tunnel testing equipment technology, and in particular to a sudden wind simulation testing device. Background Technology

[0002] Wind disasters are among the most frequent natural disasters, causing the most casualties and property damage. The vast majority of wind disasters are caused by strong winds generated by extreme weather phenomena such as tropical cyclones (typhoons or hurricanes), thunderstorms, and tornadoes. Currently, wind tunnel testing is widely used for the wind-resistant design and research of structures such as buildings and bridges, primarily based on steady winds and generally assuming a stable incoming flow and constant aerodynamic forces. However, for the aforementioned extreme weather events, a stable incoming flow is no longer sufficient to meet the increasingly sophisticated research needs. Therefore, there is an urgent need to develop wind tunnel testing technology for sudden wind changes and to develop conventional wind tunnel devices for realizing sudden wind changes. Summary of the Invention

[0003] This invention provides a sudden wind simulation test device to solve the technical problem that there is no device in the prior art that can realize sudden winds in extreme weather.

[0004] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0005] This invention provides a sudden wind simulation test device, including a frame, plate units, a transmission mechanism, and a drive unit. The frame includes a top frame, a bottom frame, and side frames, which enclose a space. The plate units are respectively installed on the top frame and the bottom frame, and the two plate units are symmetrically arranged and located within the space of the frame. The output end of the drive unit is connected to the transmission mechanism, and the output end of the transmission mechanism is hinged to the two plate units to control the opening or closing of the two plate units in the direction of the incoming wind.

[0006] Furthermore, the plate unit includes a guide plate, a movable plate, a test plate, and a first connecting rod. One end of the movable plate is hinged to the guide plate, and the other end is hinged to the test plate, and the test plate is fixed to the top frame or the base frame. The first connecting rod is arranged parallel to the movable plate, and one end of each first connecting rod is hinged to the corresponding guide plate, and the other end is hinged to the top frame or the base frame. The output end of the transmission mechanism is hinged to the two movable plates respectively to control the opening and closing angle of the two movable plates in the direction of the incoming airflow so that the two guide plates open or close.

[0007] Furthermore, the angle between the movable plate and the incoming airflow direction is 0° to 30°.

[0008] Furthermore, the sudden wind simulation test device also includes side plates, which are respectively installed on the frame on both sides of the incoming wind direction.

[0009] Furthermore, the transmission mechanism includes a connecting plate, a rack, and two second connecting rods. Each plate unit is hinged to one of the second connecting rods, and the other end of the second connecting rod is hinged to the connecting plate. One end of the rack is fixed to the connecting plate. The drive unit includes a drive assembly and a gear. The output end of the drive assembly is connected to the gear, and the gear is configured to cooperate with the rack.

[0010] Furthermore, there are two transmission mechanisms, which are respectively arranged on both sides of the plate unit near the frame.

[0011] Furthermore, the transmission mechanism also includes a first guide rod, which is provided on both sides of the frame in the direction of the incoming airflow; a first sliding groove is provided on the side of the connecting plate opposite to the first guide rod, and the first guide rod is installed in the first sliding groove so that the connecting plate slides along the first guide rod.

[0012] Furthermore, there are two first guide rods and two first slide grooves, with each guide rod and slide groove corresponding to the other.

[0013] Furthermore, the transmission mechanism also includes a second guide rod, which is arranged side by side with the rack and located on the back of the rack. The second guide rod is connected to the rack, and a second sliding groove is provided on the side frame, in which the second guide rod slides.

[0014] Furthermore, the transmission mechanism also includes a limiting member, which is mounted on the side frame, and the rack moves to the side frame to abut against the limiting member.

[0015] The sudden wind simulation test device provided by this invention symmetrically installs two plate units within a frame. A drive unit drives a transmission mechanism to open or close the plate units connected to the output end of the transmission mechanism, changing the opening and closing angle of the plate units during this process. Overflow channels are formed between the two plate units and the frame, and a test section is formed between the two plate units. When the two plate units are closed, most of the incoming airflow flows into the overflow channels. The incoming airflow, diffused by the plate units, reaches the test section with a low or zero wind speed. The drive unit and transmission mechanism control the opening of the plate units to achieve a sudden increase in wind speed. The speed of the transmission mechanism can be controlled by the drive unit to control the opening and closing speed of the plate units, thereby controlling the acceleration of the sudden wind speed change. When the plate units are fully open, the wind speed flowing into the test section is the set wind speed in the wind tunnel, i.e., the termination wind speed of the test. The above-mentioned sudden wind simulation test device has a simple structure, realizes the simulation of sudden winds in extreme weather, is applicable to any conventional wind tunnel, provides good wind field quality, and improves the accuracy and precision of the test. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the plate unit of the sudden wind simulation test device in an embodiment of the present invention when it is closed;

[0018] Figure 2 for Figure 1 Side sectional view;

[0019] Figure 3 This is a schematic diagram of the structure of the plate unit of the sudden wind simulation test device in an embodiment of the present invention after it has been opened;

[0020] Figure 4 for Figure 1 Schematic diagram of the middle plate unit;

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the drive unit;

[0022] Figure 6 for Figure 1 A schematic diagram of the cooperation between the central transmission mechanism and the side frame;

[0023] Figure 7 for Figure 1 Schematic diagram of the transmission mechanism;

[0024] Figure 8 This is a schematic diagram showing the location of the test points in the experiment of the embodiment;

[0025] Figure 9 The wind speed time-varying mean curve at the test point in the example experiment.

[0026] Figure label:

[0027] 11. Top frame; 12. Base frame; 13. Side frame; 14. Side panel;

[0028] 20. Panel Unit;

[0029] 21. Deflector plate; 22. Movable plate; 23. Test plate; 24. First connecting rod;

[0030] 30. Transmission mechanism;

[0031] 31. Connecting plate; 311. First slide groove; 32. Rack; 33. Second connecting rod; 34. First guide rod; 35. Second guide rod; 36. Limiting component;

[0032] 40. Drive unit; 41. Drive assembly; 42. Gear. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0037] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0038] This application provides a sudden wind simulation test device, including a frame, plate units 20, a transmission mechanism 30, and a drive unit 40. The frame includes a top frame 11, a bottom frame 12, and a side frame 13, which enclose a space. Plate units 20 are respectively installed on the top frame 11 and the bottom frame 12, and the two plate units 20 are symmetrically arranged and located within the space of the frame. The output end of the drive unit 40 is connected to the transmission mechanism 30, and the output end of the transmission mechanism 30 is hinged to the two plate units 20 to control the opening or closing of the two plate units 20 in the direction of the incoming wind.

[0039] Reference Figure 1 , Figure 3 In this embodiment, the top frame 11 and the bottom frame 12 each include four structural steel sections, all located in the horizontal plane. The side frame 13 includes four structural steel sections, arranged perpendicular to the horizontal plane. The top frame 11 and the side frame 13, and the bottom frame 12 and the side frame 13 are respectively fixed by angle steel to form a frame, which encloses a space. The side frame 13 can be height adjusted to fix the frame in the wind tunnel. There are two plate units 20, one mounted on the top frame 11 and the other mounted on the bottom frame 12. The two plate units 20 are arranged symmetrically. Figure 1 The middle position is the initial position. Figure 3 This is the structure after the panel unit 20 is opened. The panel unit 20 is located within the space of the frame. An overflow channel is formed between the upper panel unit 20 and the top frame 11 and the side frame 13, and an overflow channel is formed between the lower panel unit 20 and the bottom frame 12 and the side frame 13; a test section is formed between the two panel units 20.

[0040] In this embodiment, the drive unit 40 drives the transmission mechanism 30 to move, and the transmission mechanism 30 drives the plate unit 20 to open or close. See also Figure 1The drive unit 40 is located at the top of the frame, and its output end is connected to the transmission mechanism 30. The output end of the transmission mechanism 30 is hinged to the plate unit 20, enabling it to open or close. When the two plate units 20 are located... Figure 1 In the initial position, most of the incoming airflow flows into the overflow channel. After being diffused by the plate unit 20, the incoming airflow reaches the test section with a low or zero velocity. When the plate unit 20 is fully opened, the velocity of the incoming airflow flowing into the test section is the set velocity in the wind tunnel, which is the termination velocity of the test.

[0041] The sudden wind simulation test device provided in this application embodiment has two plate units 20 symmetrically installed in the space of the frame. The drive unit 40 drives the transmission mechanism 30 to move, causing the plate units 20 connected to the output end of the transmission mechanism 30 to open or close, changing the opening and closing angle of the plate units 20 in the process. The two plate units 20 form overflow channels with the frame respectively, and the two plate units 20 form a test section.

[0042] When both board units 20 are closed, refer to Figure 1 Most of the incoming airflow flows into the overflow channel. After being diffused by the plate unit 20, the incoming airflow reaches the test section with a low or zero wind speed. The opening of the plate unit 20, controlled by the drive unit 40 and the transmission mechanism 30, can achieve a sudden increase in wind speed. The speed of the transmission mechanism 30 can be controlled by the drive unit 40 to control the opening and closing speed of the plate unit 20, thereby controlling the acceleration of the sudden change in wind speed. When the plate unit 20 is fully open, the wind speed of the incoming airflow flowing into the test section is the set wind speed in the wind tunnel, that is, the termination wind speed of the test is reached.

[0043] The sudden wind simulation test device of this application embodiment has a simple structure, realizes the simulation of sudden wind in extreme weather, is applicable to any conventional wind tunnel, has good wind field quality, and improves the accuracy and precision of the test.

[0044] In some embodiments, the plate unit 20 includes a guide plate 21, a movable plate 22, a test plate 23, and a first connecting rod 24. One end of the movable plate 22 is hinged to the guide plate 21, and the other end is hinged to the test plate 23. The test plate 23 is fixed to the top frame 11 or the bottom frame 12. The first connecting rod 24 is arranged parallel to the movable plate 22. One end of each first connecting rod 24 is hinged to the corresponding guide plate 21, and the other end is hinged to the top frame 11 or the bottom frame 12. The output end of the transmission mechanism 30 is hinged to the two movable plates 22 respectively to control the opening and closing angle of the two movable plates 22 in the direction of the incoming airflow so that the two guide plates 21 open or close.

[0045] Reference Figure 2 , Figure 4The test plate 23 of the upper plate unit 20 is fixed to the top frame 11, and the test plate 23 of the lower plate unit 20 is fixed to the base frame 12. One end of the upper first connecting rod 24 is hinged to the upper guide plate 21, and the other end is hinged to the top frame 11; one end of the lower first connecting rod 24 is hinged to the lower guide plate 21, and the other end is hinged to the base frame 12. The first connecting rod 24 drives the guide plate 21 to move. (Refer to...) Figure 4 Each guide plate 21 is connected to a first connecting rod 24 at both ends. This makes the force exerted by the first connecting rod 24 on the guide plate 21 more balanced. The test plate 23 is fixed. When the output end of the transmission mechanism 30 pushes the movable plate 22, the two movable plates 22 open, thereby driving the two guide plates 21 to open, until the movable plate 22 and the guide plates 21 are both parallel to the plane of the top frame 11 or the bottom frame 12. During the opening process of the plate unit 20, the first connecting rod 24 and the plane of the movable plate 22 remain parallel at all times. The guide plates 21 always remain parallel to the direction of the incoming airflow, improving the quality of the incoming airflow into the test section.

[0046] Reference Figure 2 The transmission mechanism 30 can control the angle between the movable plate 22 and the incoming airflow, thereby controlling the flow rate of the incoming airflow into the test section, and consequently, the airflow velocity. When both guide plates 21 are closed, most of the incoming airflow flows into the overflow channel. After being diffused by the guide plates 21 and the movable plate 22, the incoming airflow reaches the test section with a low or zero velocity. (Refer to...) Figure 3 When the guide vane 21 is fully open, the movable plate 22 is also fully open, and the wind speed of the incoming airflow into the test section is the set wind speed in the wind tunnel, that is, the termination wind speed of the test. After the guide vane 21 is opened, the wind speed can be increased suddenly, and the speed of the transmission mechanism 30 can be controlled by the drive unit 40 to control the opening and closing speed of the guide vane 21 and the movable plate 22, thereby controlling the acceleration of the sudden change in wind speed.

[0047] In this embodiment, the angle between the incoming airflow direction and the movable plate 22 varies between 0° and 30°. When the angle is 30°, both guide plates 21 are completely closed, the incoming airflow flows into the overflow channel, and the wind speed in the test section is 0. When the angle is 0°, both guide plates 21 and the movable plate 22 are parallel to the incoming airflow direction, and the incoming airflow can freely pass through the test section and the overflow channel; the wind speed in the test section is the same as the incoming airflow speed. When the angle is between 0° and 30°, the flow rate into the test section is different, and the wind speed also changes accordingly. The test plate 23 is fixed on the top frame 11, which ensures that the test section has sufficient space and separates the overflow channel from the test section, ensuring that the wind speed in the test section is completely controlled by the movable plate 22.

[0048] In this embodiment of the application, the guide plate 21, movable plate 22 and test plate 23 of the above-mentioned plate unit 20 all include a skeleton and plates covering the skeleton.

[0049] In some embodiments, the sudden wind simulation test apparatus further includes side plates 14, which are respectively installed on the frames on both sides of the incoming wind direction. (Refer to...) Figure 1 Side plate 14 is installed between top frame 11, bottom frame 12 and side frame 13. Side plate 14 and test plate 23 fixed on the frame form a semi-enclosed space, which is the test section. The side plate 14 causes the incoming airflow to concentrate in the test section.

[0050] In some embodiments, the transmission mechanism 30 includes a connecting plate 31, a rack 32, and two second connecting rods 33. Each plate unit 20 is hinged to a second connecting rod 33, and the other end of the second connecting rod 33 is hinged to the connecting plate 31. One end of the rack 32 is fixed to the connecting plate 31. The drive unit 40 includes a drive assembly 41 and a gear 42. The output end of the drive assembly 41 is connected to the gear 42, and the gear 42 is configured to cooperate with the rack 32.

[0051] Reference Figure 2 , Figure 6 , Figure 7 The second connecting rod 33 is hinged to the movable plate 22. Each movable plate 22 is hinged to a corresponding second connecting rod 33. (Refer to...) Figure 5 The drive assembly 41 can drive the gear 42 to rotate in different directions. The gear 42 and rack 32 cooperate, causing the rack 32 to move back and forth. The connecting plate 31, which is fixedly connected to the rack 32, moves with the rack 32. That is, the movable plate 22 can be moved by the second connecting rod 33 on the connecting plate 31, opening or closing the two movable plates 22 and changing the opening and closing angle of the two movable plates 22. The guide plate 21 also opens or closes under the action of the movable plate 22 and the first connecting rod 24.

[0052] Furthermore, there are two transmission mechanisms 30, one on each side of the plate unit 20 near the frame. That is, both sides of the movable plate 22 are hinged to the transmission mechanism 30, i.e., the second connecting rod 33. The transmission mechanisms 30 on both sides simultaneously push the movable plate 22 to move. Compared to a single transmission mechanism 30, two transmission mechanisms 30 provide a more balanced force on the movable plate 22, resulting in better stability during movement.

[0053] In some embodiments, the transmission mechanism 30 further includes a first guide rod 34, which is provided on the frame on both sides of the incoming airflow direction; a first groove 311 is provided on the side of the connecting plate 31 opposite to the first guide rod 34, and the first guide rod 34 is installed in the first groove 311 so that the connecting plate 31 slides along the first guide rod 34.

[0054] Reference Figure 6A first groove 311 is formed on the connecting plate 31. First guide rods 34 are installed on the frames on both sides of the incoming airflow. An intermediate frame can be set between two adjacent side frames 13, and the first guide rods 34 are installed on the intermediate frame. The first groove 311 on the connecting plate 31 is opposite to the first guide rod 34, and the first guide rod 34 can be installed within the first groove 311. When the connecting plate 31 moves, the first guide rod 34 moves within the first groove 311. The cooperation between the first guide rod 34 and the first groove 311 makes the movement of the connecting plate 31 smoother, reducing friction and vibration.

[0055] Furthermore, there are two first guide rods 34 and two first slide grooves 311, with each first guide rod 34 corresponding to a first slide groove 311. Understandably, each first guide rod 34 is installed within a corresponding first slide groove 311 and moves along the first slide groove 311, increasing the reliability of the connecting plate 31's movement.

[0056] In some embodiments, the transmission mechanism 30 further includes a second guide rod 35, which is arranged side-by-side with the rack 32 and located on the back of the rack 32. The second guide rod 35 is connected to the rack 32, and a second sliding groove is provided on the side frame 13, within which the second guide rod 35 slides. (Refer to...) Figure 6 A rack 32 and a second guide rod 35 can be simultaneously installed on a steel section. The rack 32 and the second guide rod 35 are arranged back-to-back, that is, the second guide rod 35 is positioned opposite the side plate 14 adjacent to it. The rack 32 faces away from the side plate 14 adjacent to it. The second guide rod 35 is installed in a second sliding groove. When the rack 32 reciprocates, the second guide rod 35 slides within the second sliding groove. The arrangement of the second guide rod 35 and the second sliding groove increases the stability and reliability of the rack 32's movement and reduces friction and vibration.

[0057] In some embodiments, the transmission mechanism 30 further includes a limiting member 36, which is mounted on the side frame 13, and the rack 32 moves to abut against the limiting member 36 on the side frame 13. Understandably, the limiting member 36 is used to limit the movement of the rack 32, thereby restricting its position. Preferably, the transmission mechanism 30 includes a third guide rod, which is mounted on the rack 32 at the end away from the plate unit 20; a through hole is formed on the limiting member 36, through which the third guide rod passes. The cooperation between the third guide rod on the rack 32 and the through hole on the limiting member 36 further provides stability for the movement of the rack 32.

[0058] In this embodiment, the drive component 41 may include a servo motor and a transmission rod. The drive component 41 can control the rotation direction and speed of the gear 42 through the transmission rod, and control its start or stop at any time. The cooperation between the servo motor and the gear 42 rack 32 structure makes the transmission efficiency higher, enabling the wind speed change process to be completed faster, that is, the acceleration of the wind speed change is large; and the wind field quality is good, improving the accuracy and precision of the test.

[0059] According to the principle of fluid continuity, when a fluid flows continuously and stably through a pipe of varying diameter, since no part of the fluid in the pipe can be interrupted or compressed, the flow rate entering any cross-section and the flow rate exiting from another cross-section should be equal in the same time interval. This is due to the incompressibility of an ideal fluid, and since the fluid will not pass through the wall of the pipe, the flow rate is conserved during movement. Therefore, Q1 = V1*S1, Q2 = V2*S2, Q1 = Q2, and V1*S1 = V2*S2. Since the area of ​​the movable plate 22 is variable while the space of the test section remains constant, the wind speed in the test section can be controlled simply by controlling the flow rate of the fluid flowing into the test section.

[0060] At the start of the experiment, the movable plate 22 is stopped at any angle by controlling the rotation of the motor. At this time, the total flow rate of the wind tunnel is Q, and the velocity is V. The flow rate through the guide plate 21 is recorded as Q1, and the flow rate through the overflow channels on both sides is recorded as Q2. After Q1 diffuses through the movable plate 22 to the test section, Q1 remains unchanged due to the increase in area, Q1 = V1 * S1 = V2 * S2, and the velocity decreases to V2. At this time, V2 is less than V1, and the velocity at this time is the initial velocity of the test section. By calculating the flow rate and the wind speed in the wind tunnel, any initial velocity can be achieved during the experiment. When the guide plate 21 is completely closed, the initial velocity of the experiment can be 0 m / s.

[0061] Sudden change process: The motor rotates to control the gear 42 to rotate, which pushes the rack 32 that cooperates with the gear 42 to move towards the movable plate 22, so that the angle between the movable plate 22 and the incoming airflow becomes smaller rapidly, the flow rate Q1 flowing into the test section increases, and the wind speed increases.

[0062] After the sudden change ends, the movable plate 22 is parallel to the direction of the incoming airflow, and the guide plate 21, movable plate 22, and test plate 23 are on a straight line. The flow rate Q1 flowing into the test section reaches its maximum, and the wind speed V1 = V2 = V.

[0063] To verify the sudden wind simulation test device in this embodiment, the following test was conducted: the movable plate 22 was set to be able to go from fully closed to fully open within 0.8 seconds; the wind tunnel wind speed was set to 20 m / s; the initial velocity was 0 m / s; and the final velocity was 20 m / s. This test measured the wind speed at nine test points on the same plane within the test section to determine whether a sudden wind speed change could be achieved, the magnitude of the sudden acceleration, and the uniformity of the sudden wind speed change at each point within the test section.

[0064] Figure 8 This is a schematic diagram of the test point locations in this embodiment, where the origin is the center of the test section. Figure 9 The wind speed time-varying mean curves at 9 test points are given by... Figure 9 As can be seen, the sudden wind simulation test device in this embodiment can achieve large sudden changes in wind speed, the sudden change process of wind speed at each point is relatively consistent, and the acceleration of the sudden change is large, with the maximum acceleration reaching 57.10 m / s² during the sudden change. 2 .

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sudden wind simulation test device, characterized in that: The system includes a frame, panel units, a transmission mechanism, and a drive unit. The frame includes a top frame, a bottom frame, and side frames, which enclose a space. The panel units are respectively installed on the top frame and the bottom frame, and the two panel units are symmetrically arranged and located within the space of the frame. The output end of the drive unit is connected to the transmission mechanism, and the output end of the transmission mechanism is hinged to the two plate units respectively to control the opening or closing of the two plate units in the direction of the incoming airflow. The plate unit includes a guide plate, a movable plate, a test plate, and a first connecting rod. One end of the movable plate is hinged to the guide plate, and the other end is hinged to the test plate, which is fixed to the top frame or the base frame. The first connecting rod is arranged parallel to the movable plate, with one end of each first connecting rod hinged to the corresponding guide plate and the other end hinged to the top frame or the base frame. The output end of the transmission mechanism is hinged to the two movable plates respectively to control the opening and closing angle of the two movable plates in the direction of the incoming airflow, so that the two guide plates open or close. During the opening process of the plate unit, the first connecting rod and the plane where the movable plate is located always remain parallel. The angle between the movable plate and the direction of the incoming airflow is 0° to 30°. The sudden wind simulation test device also includes side plates, which are installed on the frame on both sides of the incoming wind direction.

2. The sudden wind simulation test device according to claim 1, characterized in that, The transmission mechanism includes a connecting plate, a rack, and two second connecting rods. Each plate unit is hinged to one of the second connecting rods, and the other end of the second connecting rod is hinged to the connecting plate. One end of the rack is fixed to the connecting plate. The drive unit includes a drive assembly and a gear. The output end of the drive assembly is connected to the gear, and the gear is configured to cooperate with the rack.

3. The sudden wind simulation test device according to claim 2, characterized in that, The number of transmission mechanisms is two, and the transmission mechanisms are respectively arranged on both sides of the plate unit near the frame.

4. The sudden wind simulation test device according to claim 2, characterized in that, The transmission mechanism further includes a first guide rod, which is provided on both sides of the frame in the direction of the incoming airflow; a first sliding groove is provided on the side of the connecting plate opposite to the first guide rod, and the first guide rod is installed in the first sliding groove so that the connecting plate slides along the first guide rod.

5. The sudden wind simulation test device according to claim 4, characterized in that, There are two first guide rods and two first slide grooves, with each guide rod and slide groove corresponding to the other.

6. The sudden wind simulation test device according to claim 2, characterized in that, The transmission mechanism further includes a second guide rod, which is arranged side by side with the rack and located on the back of the rack. The second guide rod is connected to the rack, and a second slide groove is provided on the side frame, in which the second guide rod slides.

7. The sudden wind simulation test device according to claim 2, characterized in that, The transmission mechanism also includes a limiting member, which is mounted on the side frame, and the rack moves to the side frame to abut against the limiting member.

Images