Air flow guiding curved pipe axial flow air cylinder for tunnel engineering and using method

Abstract

The invention relates to the technical field of tunnel engineering, in particular to an airflow guiding curved pipe axial flow air cylinder for tunnel engineering and a using method. The airflow guiding curved pipe axial flow air cylinder comprises an annular shell, an elastic inner ring and a protective outer ring. According to the device, the rotation driving assembly, the angle adjusting assembly and the distance adjusting assembly are arranged, rotation of an annular plate in an annular shell can be achieved through driving of a first motor, a circular plate in a spherical shell can be adjusted to a proper position, and rotation adjustment of the circular plate can be achieved through driving of a second motor; according to the tunnel engineering bending and height difference adjusting device, deflection adjustment is conducted on the adjacent annular shells, adaptive adjustment of bending and height difference of tunnel engineering is achieved, then driving of a third motor is combined, the distance between the annular shells can be adjusted, and therefore airflow of a draught fan can be guided and conveyed to a proper position conveniently; automatic route planning and adjusting operation can be achieved, and ventilation of tunnel engineering is facilitated.

Description

Technical Field

[0001] The invention relates to an axial flow air duct, in particular to an airflow guiding curved tube axial flow air duct for tunnel engineering and a use method thereof. Background Art

[0002] In tunnel engineering, ventilation can effectively reduce the concentration of harmful gases in the tunnel, such as gas and carbon monoxide. It can also reduce the temperature and humidity in the tunnel, improve the working conditions of construction workers, and reduce their physical exertion to ensure the safety of workers and maintain a good working environment. Therefore, good ventilation is very important to improve work efficiency.

[0003] Traditional ventilation methods mostly use straight pipe ducts and fans for air circulation. However, in the actual tunnel construction process, there are generally many bending positions and height differences. Straight pipe ducts are difficult to flexibly adapt to complex pipeline layouts, which is not conducive to airflow guidance operations for tunnel projects, greatly limiting the realization of tunnel ventilation. Based on the above reasons, the present invention proposes an airflow guidance curved pipe axial flow fan for tunnel projects and a method of use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an airflow-guiding curved-tube axial-flow air duct for tunnel engineering and a method of using the same.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A curved tube axial flow wind duct for air flow guidance for tunnel engineering comprises an annular shell, wherein the annular shells are evenly distributed with a plurality of them, an elastic inner ring and a protective outer ring are fixedly connected between two adjacent annular shells, an annular plate is movably connected inside the annular shell, a rotation driving assembly is arranged on the annular plate, a plurality of fixing rods are evenly distributed and fixedly connected on the inner side wall of the annular plate, a plurality of fixing rods are fixedly connected to the same spherical shell at one end away from the annular plate, a control module is arranged in the inner cavity of the spherical shell, a through groove is opened on the side wall of the spherical shell, a clamping assembly is arranged on the side walls of the through groove, a circular plate is arranged in the through groove, a vertical axis is fixedly connected to the center of the side wall of the circular plate, the vertical axis is movably connected to the inner wall of the spherical shell, an angle adjustment assembly is arranged on the circular plate located in the inner cavity of the spherical shell, and a spacing adjustment assembly is arranged between two adjacent spherical shells.

[0006] As a preferred technical solution of the present invention, the rotating drive assembly includes a ring gear, a ring gear is fixedly connected to the outer wall of the ring plate, a number of first gears are evenly distributed and meshed on the ring gear, a rotating shaft is fixedly connected to the center of the side wall of the first gear, one end of the rotating shaft is movably connected to the inner wall of the ring shell, and the other end of the rotating shaft is fixedly connected to the first motor, and the first motor is fixedly connected to the inner wall of the ring shell.

[0007] As a preferred technical solution of the present invention, the clamping assembly includes an arc groove, and arc grooves are opened on the two side walls of the through groove perpendicular to the circular plate. The arc grooves are movably connected with arc plates, and the arc plates are located on the side walls of the inner cavity of the arc groove and are evenly distributed and fixedly connected with a plurality of springs, the other end of the spring is fixedly connected to the inner wall of the arc groove, and the arc plate extends away from one end of the spring and is fixedly connected with a leather pad.

[0008] As a preferred technical solution of the present invention, the angle adjustment assembly includes a second motor, the second motor is fixedly connected to the inner cavity of the spherical shell, a movable shaft is fixedly connected to the rotor of the second motor, a second gear is fixedly connected to the other end of the movable shaft, a third gear is meshed with one side of the second gear, a worm is fixedly connected to the center of the side wall of the third gear, both ends of the worm are movably connected to the inner wall of the spherical shell, and an arc-shaped rack is meshed with one side of the worm.

[0009] As a preferred technical solution of the present invention, the spacing adjustment component includes a fixed tube, one end of the fixed tube is fixedly connected to the circular plate, a movable rod is movably connected inside the fixed tube, the movable rod is fixedly connected to the spherical shell at one end away from the fixed tube, a threaded rod is threadedly connected to the movable rod, and a third motor is fixedly connected to one end of the threaded rod located in the inner cavity of the fixed tube, and the third motor is fixedly connected to the inner wall of the fixed tube.

[0010] As a preferred technical solution of the present invention, the inner cavity of the fixed tube is arranged in a rectangular shape, and the cross section of the movable rod is arranged to match the cross section of the inner cavity of the fixed tube.

[0011] As a preferred technical solution of the present invention, two annular grooves are symmetrically provided on the inner side wall of the annular shell, two annular plates are symmetrically fixedly connected to the side wall of the annular plate, and the annular plates are movably connected to the annular grooves.

[0012] A method for using an airflow-guiding curved-tube axial-flow air duct for tunnel engineering comprises the following steps: S1: According to the actual length of the airflow guide or the power of the fan, the axial flow fan duct with a suitable number of annular shells is selected, and the annular shell at one end of the axial flow fan duct is connected to the external fan, and then the internal control module is connected to the external control device, and the airflow guide line is planned according to the actual situation, and the planned line is input into the control module, and the control module is used to control the internal equipment of the axial flow fan duct; S2: Start the first motor, the first motor drives the first gear to rotate, the first gear meshes with the ring gear to rotate, the ring gear drives the ring plate to rotate inside the ring shell, the ring plate drives the spherical shell to rotate through the fixing rod, and the rotation of the spherical shell can rotate the circular plate to a suitable direction; S3: Start the second motor, the second motor drives the second gear to rotate through the movable shaft, the second gear meshes with the third gear to rotate, the third gear drives the worm to rotate, the worm meshes with the arc-shaped rack to move, the arc-shaped rack drives the circular plate to rotate around the vertical axis, and the circular plate drives the fixed pipe thereon to rotate, so as to adjust the deflection angle between adjacent annular shells, so as to adapt to the bending conveying function during airflow guidance; S4: Start the third motor, the third motor drives the threaded rod to rotate, the threaded rod engages the movable rod to move, so that the movable rod extends out of the length specified by the fixed tube, and the spacing between adjacent annular shells is adjusted, so that the axial flow fan is adjusted to a suitable length, which is convenient for guiding the airflow; S5: Start the external fan, which blows the external airflow into the interior of the axial flow wind tube. Under the restriction of the elastic inner ring, the airflow can move in the axial flow wind tube, realizing precise airflow guiding operation, which is convenient for use in tunnel engineering construction.

[0013] The embodiment of the present invention provides an airflow guiding curved tube axial flow duct for tunnel engineering and a use method thereof, which has the following beneficial effects: 1. The present invention is provided with a rotation drive component, an angle adjustment component and a spacing adjustment component. The first motor is driven to realize the rotation of the annular plate in the annular shell, and the circular plate in the spherical shell can be adjusted to a suitable position. The second motor is driven to realize the rotation adjustment of the circular plate, so that the adjacent annular shells are deflected and adjusted, thereby realizing adaptive adjustment of the curvature and height difference of the tunnel project. Combined with the drive of the third motor, the spacing between the annular shells can be adjusted, so that the airflow of the fan is conveniently guided and transported to a suitable position, and the automatic route planning adjustment operation can be realized, which is convenient for the ventilation of the tunnel project; 2. The present invention is provided with an annular shell, an elastic inner ring and a protective outer ring. The annular shell can support the elastic inner ring to form a conveying air duct structure. The elastic inner ring can not only adapt to the bending of the route in the tunnel, but also seal the airflow and reduce the loss of airflow leakage, which has a good use effect. The protective outer ring can protect the internal structure and reduce the influence of the axial flow air duct on the tunnel construction team, which has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the internal structure of the present invention; Figure 4 It is a schematic diagram of the internal structure of the spherical shell of the present invention; Figure 5 is a schematic structural diagram of a rotary drive assembly of the present invention; Figure 6 is a schematic structural diagram of a spacing adjustment assembly of the present invention; Figure 7 The present invention Figure 2 Enlarged view of point A.

[0015] In the figure: 1. annular shell; 2. elastic inner ring; 3. protective outer ring; 4. annular plate; 5. rotary drive assembly; 6. fixed rod; 7. spherical shell; 8. control module; 9. through groove; 10. clamping assembly; 11. circular plate; 12. vertical axis; 13. angle adjustment assembly; 14. spacing adjustment assembly; 15. annular gear; 16. first gear; 17. rotating shaft; 18. first motor; 19. arc groove; 20. arc plate; 21. spring; 22. leather pad; 23. second motor; 24. movable shaft; 25. second gear; 26. third gear; 27. worm; 28. arc rack; 29. ​​fixed tube; 30. movable rod; 31. threaded rod; 32. third motor; 33. annular groove; 34. annular plate. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] Example: Figure 1-7 As shown, an airflow guiding curved tube axial flow wind tube for tunnel engineering comprises an annular shell 1, wherein a plurality of annular shells 1 are evenly distributed, and an elastic inner ring 2 and a protective outer ring 3 are fixedly connected between two adjacent annular shells 1; In the technical solution of this embodiment, the elastic inner ring 2 can not only adapt to the bending of the route in the tunnel, but also realize the sealing of the airflow, reduce the airflow leakage loss, and have a good use effect. The protective outer ring 3 can protect the internal structure and reduce the influence of the axial flow wind tube of the tunnel construction team, and has a good use effect. An annular plate 4 is movably connected in the annular shell 1, and a rotation drive assembly 5 is arranged on the annular plate 4. A plurality of fixed rods 6 are evenly distributed and fixedly connected on the inner side wall of the annular plate 4, and a plurality of fixed rods 6 are fixedly connected to the same spherical shell 7 at one end away from the annular plate 4. The rotation drive assembly 5 includes an annular gear 15, and an annular gear 15 is fixedly connected to the outer side wall of the annular plate 4. A plurality of first gears 16 are evenly distributed and meshed on the annular gear 15. A rotating shaft 17 is fixedly connected to the center of the side wall of the first gear 16, and one end of the rotating shaft 17 is movably connected to the inner wall of the annular shell 1, and the other end of the rotating shaft 17 is fixedly connected to a first motor 18, and the first motor 18 is fixedly connected to the inner wall of the annular shell 1; In the technical solution of this embodiment, the first motor 18 is started, the first motor 18 drives the first gear 16 to rotate, the first gear 16 engages the ring gear 15 to rotate, the ring gear 15 drives the ring plate 4 to rotate inside the ring shell 1, the ring plate 4 drives the spherical shell 7 to rotate through the fixing rod 6, and the rotation of the spherical shell 7 can rotate the circular plate 11 to a suitable direction; Furthermore, two annular grooves 33 are symmetrically provided on the inner side wall of the annular shell 1, and two annular plates 34 are symmetrically fixedly connected to the side wall of the annular plate 4. The annular plates 34 are movably connected to the annular grooves 33, so as to ensure the stable rotation of the annular plate 4 in the annular shell 1. A control module 8 is provided in the inner cavity of the spherical shell 7, a through groove 9 is provided on the side wall of the spherical shell 7, and a clamping assembly 10 is provided on both side walls of the through groove 9. The clamping assembly 10 includes an arc groove 19. The through groove 9 is provided on both side walls perpendicular to the circular plate 11, and an arc plate 20 is movably connected in the arc groove 19. The arc plate 20 is located on the side wall of the inner cavity of the arc groove 19 and is evenly distributed and fixedly connected with a plurality of springs 21. The other end of the spring 21 is fixedly connected to the inner wall of the arc groove 19, and the arc plate 20 extends away from one end of the spring 21 to the arc groove 19 and is fixedly connected with a leather pad 22. In the technical solution of this embodiment, the leather pad 22 can be pressed against the side wall of the circular plate 11 under the action of the spring 21, which can not only effectively realize the positioning and maintenance of the circular plate 11, but also reduce the entry of external impurities into the inner cavity of the spherical shell 7, reduce the probability of damage to the internal structure of the spherical shell 7, and improve the stability of the use of the device; A circular plate 11 is provided in the through groove 9, and a vertical shaft 12 is fixedly connected to the center of the side wall of the circular plate 11, and the vertical shaft 12 is movably connected to the inner wall of the spherical shell 7. The circular plate 11 is located in the inner cavity of the spherical shell 7 and is provided with an angle adjustment component 13. The angle adjustment component 13 includes a second motor 23, and the inner cavity of the spherical shell 7 is fixedly connected to the second motor 23. A movable shaft 24 is fixedly connected to the rotor of the second motor 23, and a second gear 25 is fixedly connected to the other end of the movable shaft 24. A third gear 26 is meshed with one side of the second gear 25, and a worm 27 is fixedly connected to the center of the side wall of the third gear 26. Both ends of the worm 27 are movably connected to the inner wall of the spherical shell 7, and an arc-shaped rack 28 is meshed with one side of the worm 27. In the technical solution of this embodiment, the second motor 23 is started, and the second motor 23 drives the second gear 25 to rotate through the movable shaft 24, and the second gear 25 meshes with the third gear 26 to rotate, and the third gear 26 drives the worm 27 to rotate, and the worm 27 meshes with the arc-shaped rack 28 to move, and the arc-shaped rack 28 drives the circular plate 11 to rotate around the vertical axis 12, and the circular plate 11 drives the fixed pipe 29 thereon to rotate, so that the deflection angle between adjacent annular shells 1 can be adjusted, so as to adapt to the bending conveying function when the airflow is guided; A spacing adjustment component 14 is provided between two adjacent spherical shells 7. The spacing adjustment component 14 includes a fixed tube 29. One end of the fixed tube 29 is fixedly connected to the circular plate 11. A movable rod 30 is movably connected in the fixed tube 29. One end of the movable rod 30 away from the fixed tube 29 is fixedly connected to the spherical shell 7. A threaded rod 31 is threadedly connected to the movable rod 30. One end of the threaded rod 31 located in the inner cavity of the fixed tube 29 is fixedly connected to a third motor 32. The third motor 32 is fixedly connected to the inner wall of the fixed tube 29. In the technical solution of this embodiment, the third motor 32 is started, the third motor 32 drives the threaded rod 31 to rotate, and the threaded rod 31 engages the movable rod 30 to move, so that the movable rod 30 extends the length specified by the fixed tube 29, and the spacing between adjacent annular shells 1 is adjusted, so that the axial flow air duct is adjusted to a suitable length, which is convenient for guiding the airflow; Furthermore, the inner cavity of the fixed tube 29 is rectangular, and the cross section of the movable rod 30 is matched with the inner cavity cross section of the fixed tube 29 to prevent the movable rod 30 from rotating in the fixed tube 29, thereby facilitating the adjustment of the spacing between the annular shells 1.

[0018] A method for using an airflow-guiding curved-tube axial-flow air duct for tunnel engineering comprises the following steps: S1: According to the actual length of the airflow guide or the power of the fan, the axial flow fan duct with a suitable number of annular shells 1 is selected, and the annular shell 1 at one end of the axial flow fan duct is connected to the external fan, and then the internal control module 8 is connected to the external control device, and the airflow guide line is planned according to the actual situation, and the planned line is input into the control module 8, and the control module 8 is used to control the internal equipment of the axial flow fan duct; S2: Start the first motor 18, the first motor 18 drives the first gear 16 to rotate, the first gear 16 engages the ring gear 15 to rotate, the ring gear 15 drives the ring plate 4 to rotate inside the ring shell 1, the ring plate 4 drives the spherical shell 7 to rotate through the fixing rod 6, and the rotation of the spherical shell 7 can rotate the circular plate 11 to a suitable direction; S3: Start the second motor 23, the second motor 23 drives the second gear 25 to rotate through the movable shaft 24, the second gear 25 engages with the third gear 26 to rotate, the third gear 26 drives the worm 27 to rotate, the worm 27 engages with the arc-shaped rack 28 to move, the arc-shaped rack 28 drives the circular plate 11 to rotate around the vertical axis 12, and the circular plate 11 drives the fixed pipe 29 thereon to rotate, so as to realize the adjustment operation of the deflection angle between adjacent annular shells 1, so as to adapt to the bending conveying function during airflow guidance; S4: starting the third motor 32, the third motor 32 drives the threaded rod 31 to rotate, the threaded rod 31 engages the movable rod 30 to move, so that the movable rod 30 extends to the length specified by the fixed tube 29, and the spacing between adjacent annular shells 1 is adjusted, so that the axial flow air duct is adjusted to a suitable length, which is convenient for guiding the airflow; S5: Start the external fan, which blows the external airflow into the interior of the axial flow wind tube. Under the restriction of the elastic inner ring 2, the airflow can move in the axial flow wind tube, realizing precise airflow guiding operation, which is convenient for use in tunnel engineering construction.

[0019] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An airflow guiding curved tube axial flow duct for tunnel engineering, comprising an annular shell (1), characterized in that: The annular shells (1) are evenly distributed and provided with a plurality of them. An elastic inner ring (2) and a protective outer ring (3) are fixedly connected between two adjacent annular shells (1). An annular plate (4) is movably connected inside the annular shells (1). A rotation drive assembly (5) is provided on the annular plate (4). A plurality of fixing rods (6) are evenly distributed and fixedly connected to the inner side wall of the annular plate (4). The ends of the plurality of fixing rods (6) away from the annular plate (4) are fixedly connected to the same spherical shell (7). The inner cavity of the spherical shell (7) is provided with A control module (8), wherein a through slot (9) is provided on a side wall of the spherical shell (7), and a clamping assembly (10) is provided on both side walls of the through slot (9). A circular plate (11) is provided in the through slot (9), and a vertical shaft (12) is fixedly connected to the center of the side wall of the circular plate (11), and the vertical shaft (12) is movably connected to the inner wall of the spherical shell (7). The circular plate (11) is located in the inner cavity of the spherical shell (7) and is provided with an angle adjustment assembly (13), and a spacing adjustment assembly (14) is provided between two adjacent spherical shells (7).

2. The airflow-guiding curved-tube axial-flow duct for tunnel engineering according to claim 1, characterized in that: The rotary drive assembly (5) comprises a ring gear (15), the outer wall of the ring plate (4) being fixedly connected to the ring gear (15), a plurality of first gears (16) being evenly distributed and meshed on the ring gear (15), the center of the side wall of each of the first gears (16) being fixedly connected to a rotating shaft (17), one end of the rotating shaft (17) being movably connected to the inner wall of the ring shell (1), the other end of the rotating shaft (17) being fixedly connected to a first motor (18), and the first motor (18) being fixedly connected to the inner wall of the ring shell (1).

3. The airflow-guiding curved-tube axial-flow duct for tunnel engineering according to claim 1, characterized in that: The clamping assembly (10) includes an arc groove (19), and the two side walls of the through groove (9) perpendicular to the circular plate (11) are each provided with an arc groove (19), and an arc plate (20) is movably connected in the arc groove (19), and the arc plate (20) is evenly distributed and fixedly connected with a plurality of springs (21) on the side wall of the inner cavity of the arc groove (19), and the other end of the spring (21) is fixedly connected to the inner wall of the arc groove (19), and the arc plate (20) extends away from one end of the spring (21) and is fixedly connected with a leather pad (22).

4. The airflow-guiding curved-tube axial-flow duct for tunnel engineering according to claim 1, characterized in that: The angle adjustment assembly (13) comprises a second motor (23), the inner cavity of the spherical shell (7) is fixedly connected to the second motor (23), the rotor of the second motor (23) is fixedly connected to a movable shaft (24), the other end of the movable shaft (24) is fixedly connected to a second gear (25), one side of the second gear (25) is meshed with a third gear (26), the center of the side wall of the third gear (26) is fixedly connected to a worm (27), both ends of the worm (27) are movably connected to the inner wall of the spherical shell (7), and one side of the worm (27) is meshed with an arc-shaped rack (28).

5. The airflow-guiding curved-tube axial-flow duct for tunnel engineering according to claim 1, characterized in that: The spacing adjustment assembly (14) comprises a fixed tube (29), one end of the fixed tube (29) is fixedly connected to the circular plate (11), a movable rod (30) is movably connected inside the fixed tube (29), one end of the movable rod (30) away from the fixed tube (29) is fixedly connected to the spherical shell (7), a threaded rod (31) is threadedly connected to the movable rod (30), one end of the threaded rod (31) located in the inner cavity of the fixed tube (29) is fixedly connected to a third motor (32), and the third motor (32) is fixedly connected to the inner wall of the fixed tube (29).

6. The airflow-guiding curved-tube axial-flow air duct for tunnel engineering according to claim 5, characterized in that: The inner cavity of the fixed tube (29) is arranged in a rectangular shape, and the cross section of the movable rod (30) is arranged to match the cross section of the inner cavity of the fixed tube (29).

7. The airflow-guiding curved-tube axial-flow air duct for tunnel engineering according to claim 1, characterized in that: Two annular grooves (33) are symmetrically formed on the inner side wall of the annular shell (1), and two annular plates (34) are symmetrically fixedly connected to the side wall of the annular plate (4), and the annular plates (34) are movably connected to the annular grooves (33).

8. The method for using the airflow-guiding curved-tube axial-flow air duct for tunnel engineering according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: According to the actual length of the air flow guide or the power of the fan, an axial flow fan duct having a suitable number of annular shells (1) is selected, and the annular shell (1) at one end of the axial flow fan duct is connected to the external fan, and then the internal control module (8) is connected to the external control device, and the air flow guide line is planned according to the actual situation, and the planned line is input into the control module (8), and the control module (8) is used to control the internal equipment of the axial flow fan duct; S2: starting the first motor (18), the first motor (18) drives the first gear (16) to rotate, the first gear (16) meshes with the ring gear (15) to rotate, the ring gear (15) drives the ring plate (4) to rotate inside the ring shell (1), the ring plate (4) drives the spherical shell (7) to rotate via the fixing rod (6), and the rotation of the spherical shell (7) can rotate the circular plate (11) to a suitable direction; S3: starting the second motor (23), the second motor (23) drives the second gear (25) to rotate via the movable shaft (24), the second gear (25) meshes with the third gear (26) to rotate, the third gear (26) drives the worm (27) to rotate, the worm (27) meshes with the arc-shaped rack (28) to move, the arc-shaped rack (28) drives the circular plate (11) to rotate around the vertical axis (12), the circular plate (11) drives the fixed pipe (29) thereon to rotate, and the deflection angle between adjacent annular shells (1) can be adjusted, so as to adapt to the curved conveying function when the airflow is guided; S4: starting the third motor (32), the third motor (32) drives the threaded rod (31) to rotate, the threaded rod (31) engages the movable rod (30) to move, so that the movable rod (30) extends to a length specified by the fixed tube (29), thereby adjusting the spacing between adjacent annular shells (1), thereby adjusting the axial flow air duct to a suitable length, and facilitating the guidance of the air flow; S5: Start the external fan, which blows the external airflow into the interior of the axial flow wind tube. Under the restriction of the elastic inner ring (2), the airflow can move in the axial flow wind tube, thereby achieving precise airflow guidance operation, which is convenient for use in tunnel engineering construction.

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