A wind tunnel fan section inclined ladder hatch door

Abstract

The utility model relates to a cabin door structure, specifically disclose a wind tunnel fan section inclined ladder cabin door, including the import and export of wind tunnel bottom wall, the sealing plate of import and export department, to connect the hinge piece of sealing plate one end with the wind tunnel bottom wall, to drive the first drive arrangement of sealing plate rotation around the hinge piece, the slide plate of sliding in the sealing plate close to the inside of wind tunnel, a plurality of footboard on the slide plate, and to drive the second drive arrangement of slide plate along the length direction of sealing plate moves, when sealing plate is completely in the inside of import and export, the slide plate can slide to the wind tunnel bottom wall. The utility model discloses a wind tunnel fan section inclined ladder cabin door, and it can be efficient automation open and close, and personnel and equipment are convenient for in and out.

Description

Technical Field

[0001] This utility model relates to the technical field of cabin door structures, and more specifically, to a wind tunnel fan section inclined ladder cabin door. Background Technology

[0002] As a core piece of equipment for aerodynamic research and product testing, the performance of wind tunnels directly determines the accuracy and reliability of test data. For large wind tunnels, which need to simulate high-velocity and wide-range airflow environments, the power output of a single fan is far from sufficient. Therefore, the industry generally adopts an array-type air supply system composed of multiple fans. Throughout the entire lifecycle of a large wind tunnel, the initial installation and commissioning, as well as the subsequent operation and maintenance, are crucial for ensuring the long-term stable operation of the equipment. Due to the very large diameter and volume of individual wind tunnels, independent access channels are necessary for convenient installation and maintenance. Therefore, independent hatch structures are typically installed on the sidewalls of the wind tunnel for personnel and equipment access. However, traditional hatch structures are mostly semi-automatic, making opening and closing inconvenient, and requiring a separate ladder for entry and exit after opening. Therefore, a hatch structure that allows for more convenient access can be designed. Utility Model Content

[0003] The purpose of this invention is to provide a wind tunnel fan section inclined ladder cabin door that can be opened and closed automatically and efficiently, facilitating the entry and exit of personnel and equipment.

[0004] This utility model is achieved through the following technical solution: The inclined ladder door of the wind tunnel fan section of this utility model includes an inlet and outlet opened on the bottom wall of the wind tunnel, a sealing plate provided at the inlet and outlet, a hinge for connecting one end of the sealing plate to the bottom wall of the wind tunnel, a first driving device for driving the sealing plate to rotate around the hinge, a sliding plate slidably provided on the sealing plate near the inside of the wind tunnel, a plurality of foot pedals provided on the sliding plate, and a second driving device for driving the sliding plate to move along the length direction of the sealing plate; when the sealing plate is completely inside the inlet and outlet, the sliding plate can slide onto the bottom wall of the wind tunnel.

[0005] Furthermore, the hinge includes a first hinge block disposed on the sidewall of the wind tunnel near the inlet and outlet, a second hinge block disposed on the sealing plate near the first hinge block, and a rotating shaft rotatably connected to both the first hinge block and the second hinge block; the first hinge block is fixedly connected to the sidewall of the wind tunnel, and the second hinge block is fixedly connected to the sealing plate; the axial direction of the rotating shaft is perpendicular to the moving direction of the slide plate.

[0006] Furthermore, there are multiple first hinge blocks, which are distributed along the axial direction of the rotating shaft; there are also multiple second hinge blocks, which are distributed along the axial direction of the rotating shaft.

[0007] Furthermore, the first driving device includes a support base fixedly disposed on the inner wall of the wind tunnel, a first telescopic cylinder hinged to the support base, and a connecting block fixedly disposed on the upper side of the sealing plate near one end of the support base; the cylinder body of the first telescopic cylinder is hinged to the support base, and the movable end of the first telescopic cylinder is hinged to the connecting block.

[0008] Furthermore, the first driving device is provided in pairs, with the pair of first driving devices respectively located on opposite sides of the sealing plate.

[0009] Furthermore, the sealing plate is provided with a pair of slide rails on the side near the slide plate, and the slide plate is provided with a pair of slide bars on the side near the sealing plate; one slide bar is slidably disposed in one of the slide rails; the length direction of the slide rail is parallel to the movement direction of the slide plate.

[0010] Furthermore, the second driving device includes a second telescopic cylinder disposed on the sealing plate, and a driving plate fixedly disposed on the side of the slide plate near the sealing plate; the cylinder body of the second telescopic cylinder is fixedly connected to the sealing plate, and the movable end of the second telescopic cylinder is fixedly connected to the driving plate.

[0011] Furthermore, a rubber pad is attached to the surface of the foot pedal.

[0012] The technical solution of this utility model has at least the following advantages and beneficial effects: The inclined ladder door of the wind tunnel fan section of this utility model can seal the inlet and outlet through a sealing plate. When personnel do not need to use the inlet and outlet for entry and exit, the sealing plate can be used to prevent air from passing through the inlet and outlet, preventing the inlet and outlet from affecting the airflow. When personnel need to enter and exit, the first driving device can be used to drive the sealing plate to rotate around the hinge, so that the sealing plate, sliding plate and foot pedal are lowered, and then personnel can step on the foot pedal to enter and exit the wind tunnel. After use, the first driving device is used to pull the sealing plate back into the inlet and outlet, and then the second driving device drives the sliding plate to move to the inner wall of the wind tunnel. The sliding plate supports the sealing plate by pressing against the inner wall of the wind tunnel, reducing the burden on the first driving device and locking the sealing plate. Furthermore, the extension length of the foot pedal can be extended by sliding the sliding plate. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the inclined ladder cabin door of the wind tunnel fan section provided in an embodiment of this utility model; Figure 2 for Figure 1Another structural diagram from another perspective; Figure 3 A schematic diagram of the two states of the inclined ladder cabin door of the wind tunnel fan section provided in an embodiment of this utility model; Figure 4 A schematic diagram of the three states of the inclined ladder cabin door of the wind tunnel fan section provided for an embodiment of this utility model; Figure 5 A schematic diagram of the four states of the inclined ladder cabin door of the wind tunnel fan section provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the unfolded structure of the sealing plate and sliding plate provided in an embodiment of the present utility model; Figure 7 for Figure 6 Another structural diagram from another perspective; Figure 8 for Figure 2 Enlarged view of section A.

[0014] Icons: 10-Wind tunnel, 11-Inlet / outlet, 12-Sealing plate, 13-Skateboard, 14-Foot pedal, 15-Slide rail, 16-Slide bar, 20-Hinge, 21-First hinge block, 22-Second hinge block, 23-Shaft, 30-First drive unit, 31-Support base, 32-First telescopic cylinder, 33-Connecting block, 40-Second drive unit, 41-Second telescopic cylinder, 42-Drive plate. Detailed Implementation

[0015] Example The following description, in conjunction with specific embodiments, further illustrates the points, as shown in the appendix. Figure 1 -Appendix Figure 8 As shown, the inclined ladder door of the wind tunnel fan section in this embodiment includes an inlet / outlet 11 formed on the bottom wall of the wind tunnel 10, a sealing plate 12 disposed at the inlet / outlet 11, a hinge 20 connecting one end of the sealing plate 12 to the bottom wall of the wind tunnel 10, a first drive device 30 for driving the sealing plate 12 to rotate around the hinge 20, a sliding plate 13 slidably disposed on the sealing plate 12 near the inside of the wind tunnel 10, multiple foot pedals 14 disposed on the sliding plate 13, and a second drive device 40 for driving the sliding plate 13 to move along the length direction of the sealing plate 12; when the sealing plate 12 is completely inside the inlet / outlet 11, the sliding plate 13 can slide onto the bottom wall of the wind tunnel 10. Specifically, the sealing plate 12 can seal the inlet / outlet 11. When the inlet / outlet 11 is not needed for personnel access, the sealing plate 12 can be used to prevent air from passing through the inlet / outlet 11 and prevent the inlet / outlet 11 from affecting the airflow. When personnel need to enter or exit, the first drive device 30 can be used to drive the sealing plate 12 to rotate around the hinge 20, so that the sealing plate 12, the slide plate 13, and the foot pedal 14 are lowered (as shown in the attached diagram). Figure 1-2(As shown), then personnel can step on foot pedal 14 to enter and exit the wind tunnel 10. After use, the first drive device 30 is used to pull the sealing plate 12 back into the inlet / outlet 11 (as shown in the attached diagram). Figure 4 (As shown), then the second drive unit 40 drives the slide plate 13 to move to the inner wall of the wind tunnel 10 (as shown in the attached diagram). Figure 5 As shown, the sealing plate 12 is supported by the sliding plate 13 against the inner wall of the wind tunnel 10, reducing the burden on the first drive device 30 and locking the sealing plate 12. Furthermore, the extension length of the foot pedal 14 can be extended by sliding the sliding plate 13 (as shown in the attached diagram). Figure 3 (As shown).

[0016] The hinge component 20 in this embodiment includes a first hinge block 21 located on the side wall of the wind tunnel 10 near the inlet / outlet 11, a second hinge block 22 located on the sealing plate 12 near the first hinge block 21, and a rotating shaft 23 rotatably connected to both the first hinge block 21 and the second hinge block 22. The first hinge block 21 is fixedly connected to the side wall of the wind tunnel 10, and the second hinge block 22 is fixedly connected to the sealing plate 12. The axial direction of the rotating shaft 23 is perpendicular to the moving direction of the slide plate 13. Multiple first hinge blocks 21 are provided, distributed along the axial direction of the rotating shaft 23; multiple second hinge blocks 22 are also provided, distributed along the axial direction of the rotating shaft 23. Specifically, the rotation of the sealing plate 12 can be achieved through the first hinge block 21, the second hinge block 22, and the rotating shaft 23. Providing multiple first hinge blocks 21 and second hinge blocks 22 can effectively improve the support for the sealing plate 12.

[0017] In this embodiment, the first driving device 30 includes a support base 31 fixedly disposed on the inner wall of the wind tunnel 10, a first telescopic cylinder 32 hinged to the support base 31, and a connecting block 33 fixedly disposed on the upper side of the sealing plate 12 near the support base 31. The cylinder body of the first telescopic cylinder 32 is hinged to the support base 31, and the movable end of the first telescopic cylinder 32 is hinged to the connecting block 33. Specifically, the first telescopic cylinder 32 and the connecting block 33 can drive the sealing plate 12 to rotate around the rotating shaft 23, wherein the connecting block 33 is disposed closer to the support base 31, and the first telescopic cylinder 32 can rotate hydraulic cylinders, electric push rods, etc. Furthermore, the first telescopic cylinder 32 needs to be set with an upper limit and a lower limit to avoid excessive extension or excessive contraction.

[0018] In this embodiment, a pair of first driving devices 30 are provided, with the pair of first driving devices 30 respectively located on opposite sides of the sealing plate 12. Specifically, by providing first telescopic cylinders 32 on both sides of the sealing plate 12, the force on the sealing plate 12 can be more balanced, and the burden on the first telescopic cylinders 32 can be reduced. However, this requires the pair of first telescopic cylinders 32 to operate synchronously. Therefore, the first telescopic cylinders 32 can adopt an electric push rod structure, similar to a ball screw structure. In this way, the same motor can be used to drive the pair of first telescopic cylinders 32 to operate completely synchronously through gears or chains. Alternatively, a high-precision synchronously controlled hydraulic cylinder can be used.

[0019] In this embodiment, the sealing plate 12 is provided with a pair of slide rails 15 on the side near the slide plate 13, and the slide plate 13 is provided with a pair of slide bars 16 on the side near the sealing plate 12; one slide bar 16 is slidably disposed in one slide rail 15; the length direction of the slide rail 15 is parallel to the moving direction of the slide plate 13. Specifically, through the cooperation of the slide rail 15 and the slide bar 16, the slide plate 13 can slide on the sealing plate 12, and the slide bar 16 can adopt an L-shaped structure or a T-shaped structure so that it can be locked in the slide rail 15 and will not come out of the slide rail 15. Furthermore, both ends of the slide rail 15 are closed ends, which can limit the range of movement of the slide bar 16 and prevent it from coming out of the slide rail 15.

[0020] In this embodiment, the second driving device 40 includes a second telescopic cylinder 41 mounted on the sealing plate 12 and a driving plate 42 fixedly mounted on the side of the slide plate 13 near the sealing plate 12. The cylinder body of the second telescopic cylinder 41 is fixedly connected to the sealing plate 12, and the movable end of the second telescopic cylinder 41 is fixedly connected to the driving plate 42. Specifically, the second telescopic cylinder 41 is connected to the driving plate 42, and the driving plate 42 can push the slide plate 13 to move on the sealing plate 12. The second telescopic cylinder 41 can be a hydraulic cylinder, a pneumatic cylinder, an electric push rod, or the like.

[0021] In this embodiment, the surface of the foot pedal 14 is covered with a rubber pad.

[0022] In summary, the inclined ladder door of the wind tunnel fan section in this embodiment can seal the inlet and outlet 11 through the sealing plate 12. When personnel do not need to use the inlet and outlet 11 for entry and exit, the sealing plate 12 can be used to prevent air from passing through the inlet and outlet 11 and prevent the inlet and outlet 11 from affecting the airflow. When personnel need to enter and exit, the first drive device 30 can be used to drive the sealing plate 12 to rotate around the hinge 20, so that the sealing plate 12, the sliding plate 13, and the foot pedal 14 are lowered, and then personnel can step on the foot pedal 14 to enter and exit the wind tunnel 10. After use, the first drive device 30 is used to pull the sealing plate 12 back into the inlet and outlet 11, and then the second drive device 40 drives the sliding plate 13 to move to the inner wall of the wind tunnel 10. The sliding plate 13 supports the sealing plate 12 by pressing against the inner wall of the wind tunnel 10, reducing the burden on the first drive device 30 and locking the sealing plate 12. Furthermore, the extension length of the foot pedal 14 can be extended by sliding the sliding plate 13.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sloping ladder cabin door for a wind tunnel fan section, characterized in that: comprising an access opening (11) formed in the bottom wall of the wind tunnel (10), a sealing plate (12) arranged at the access opening (11), a hinge member (20) for connecting one end of the sealing plate (12) to the bottom wall of the wind tunnel (10), a first driving device (30) for driving the sealing plate (12) to rotate around the hinge member (20), a sliding plate (13) slidably arranged on the side of the sealing plate (12) close to the inner side of the wind tunnel (10), a plurality of foot pedals (14) arranged on the sliding plate (13), and a second driving device (40) for driving the sliding plate (13) to move along the length direction of the sealing plate (12); When the sealing plate (12) is completely located inside the access opening (11), the sliding plate (13) can slide onto the bottom wall of the wind tunnel (10).

2. The inclined ladder cabin door of the wind tunnel fan section according to claim 1, characterized in that: The hinge member (20) comprises a first hinge block (21) arranged on the side wall of the wind tunnel (10) at a position close to the access opening (11), a second hinge block (22) arranged on the sealing plate (12) at a position close to the first hinge block (21), and a rotating shaft (23) which is rotatably connected with both the first hinge block (21) and the second hinge block (22); The first hinge block (21) is fixedly connected to the side wall of the wind tunnel (10), and the second hinge block (22) is fixedly connected to the sealing plate (12); The axial direction of the rotating shaft (23) is perpendicular to the moving direction of the sliding plate (13).

3. The inclined ladder cabin door of the wind tunnel fan section according to claim 2, characterized in that: A plurality of the first hinge blocks (21) are provided, and the plurality of first hinge blocks (21) are distributed along the axial direction of the rotating shaft (23); A plurality of the second hinge blocks (22) are provided, and the plurality of second hinge blocks (22) are distributed along the axial direction of the rotating shaft (23).

4. The inclined ladder cabin door of the wind tunnel fan section according to claim 1, characterized in that: The first driving device (30) comprises a support base (31) fixedly arranged on the inner wall of the wind tunnel (10), a first telescopic cylinder (32) hinged to the support base (31), and a connecting block (33) fixedly arranged on the upper side of the end of the sealing plate (12) close to the support base (31); The cylinder body of the first telescopic cylinder (32) is hinged to the support base (31), and the movable end of the first telescopic cylinder (32) is hinged to the connecting block (33).

5. The inclined ladder cabin door of the wind tunnel fan section according to claim 4, characterized in that: A pair of the first driving devices (30) are provided, and the pair of first driving devices (30) are respectively arranged on two opposite sides of the sealing plate (12).

6. The inclined ladder cabin door of the wind tunnel fan section according to claim 1, characterized in that: A pair of sliding rails (15) are arranged on the side of the sealing plate (12) close to the sliding plate (13), and a pair of sliding strips (16) are arranged on the side of the sliding plate (13) close to the sealing plate (12); One sliding strip (16) is slidably arranged in one sliding rail (15); the length direction of the sliding rail (15) is parallel to the moving direction of the sliding plate (13).

7. The inclined ladder cabin door of the wind tunnel fan section according to claim 1, characterized in that: The second driving device (40) comprises a second telescopic cylinder (41) arranged on the sealing plate (12), and a driving plate (42) fixedly arranged on the side of the sliding plate (13) close to the sealing plate (12); The cylinder body of the second telescopic cylinder (41) is fixedly connected to the sealing plate (12), and the movable end of the second telescopic cylinder (41) is fixedly connected to the drive plate (42).

8. The inclined ladder cabin door of the wind tunnel fan section according to claim 1, characterized in that: The foot pedal (14) is covered with a rubber pad.

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