Tunnel fan and control method

Abstract

The invention provides a tunnel draught fan and a control method, the tunnel draught fan comprises a fixed arc plate and a draught fan body, the draught fan body comprises an operation part and silencing parts arranged on the two sides of the operation part, the tail ends of the silencing parts are provided with automatic barrel covers, and the tunnel draught fan further comprises a damping warning mechanism arranged on the peripheries of the silencing parts, comprising a vibration sensor arranged in an inner cavity of a silencing part, a hidden air door and a pneumatic telescopic mechanism arranged on the periphery of the silencing part, and a warning light bar is arranged on the pneumatic telescopic mechanism; and the wind gathering and direction adjusting mechanism is arranged on the automatic barrel cover. According to the tunnel fan, internal air flow can be guided to the pneumatic telescopic mechanism, the flow direction of internal air is changed, turbulence caused by unstable internal air flow can be eliminated, the warning lamp strip is driven to move through stretching and retracting, lamplight warning is conducted on overspeed vehicles, the wind gathering and direction adjusting mechanism can be controlled to flexibly adjust the direction of an air opening, and the use scene of the tunnel fan is expanded.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel fans, and in particular to a tunnel fan and a control method thereof. Background Art

[0002] The statements in this section merely provide background technical information related to the present application and do not necessarily constitute prior art.

[0003] Tunnel fans, also known as jet fans, are a special type of axial flow fans, mainly used in the longitudinal ventilation systems of highway, railway and subway tunnels. They can suck part of the air in the tunnel from one end of the fan, accelerate it through the impeller, and then eject it at high speed from the other end of the fan, thereby promoting the air flow in the tunnel and achieving the purpose of ventilation. During tunnel construction, tunnel fans can also discharge harmful gases generated by explosive explosions and the use of internal combustion engines, providing a good construction environment for tunnel construction, maintaining the health of operators, and ensuring normal and smooth construction.

[0004] The existing fans have the following problems during use:

[0005] In order to reduce noise, existing tunnel fans will install silencer pipes on both sides of the original operating air duct. When the internal air pressure of the fan is unstable due to a sharp change in motor speed, loose internal connections or other reasons, the fan is prone to internal air flow instability, causing violent turbulence and damage to the fan body. In particular, the lack of mechanical parts connection inside the silencer will cause greater damage to the side wall deformation caused by vibration.

[0006] In addition, when the fan is running at high speed, the gas velocity nearby will increase, which may easily affect the driving of heavy-loaded vehicles that are close to it.

[0007] At the intersections inside the tunnel or at both ends of the tunnel, eddies and swirls are easily generated due to the convergence of airflows and the high-speed operation of vehicles, which affect the normal driving of vehicles in the tunnel. Summary of the invention

[0008] In order to solve the problems in the background technology, the present application proposes a tunnel fan and a control method.

[0009] The present application provides a tunnel fan, comprising a fixed arc plate and a fan body, wherein the fan body comprises an operating part and a muffler part arranged on both sides of the operating part, an automatic cylinder cover is arranged at the end of the muffler part, and further comprises:

[0010] A vibration-absorbing warning mechanism is arranged on the periphery of the muffler, comprising a vibration sensor arranged in the inner cavity of the muffler, a hidden damper, and a pneumatic telescopic mechanism arranged on the periphery of the muffler, wherein a warning light bar is arranged on the pneumatic telescopic mechanism;

[0011] The wind gathering and direction adjustment mechanism is arranged on the automatic cylinder cover.

[0012] Preferably, the pneumatic telescopic mechanism comprises a connecting seat embedded in the outer peripheral side wall of the muffler, a plurality of telescopic tubes are vertically arranged on the end surface of the connecting seat away from the muffler, an arc-shaped connecting seat is arranged at the end of the telescopic part of the telescopic tube, elastic folding airbags are arranged on both sides of the extending direction of the arc-shaped connecting seat, and the warning light bar is arranged on the outer periphery of the elastic folding airbag;

[0013] The telescopic cylinder, the arc-shaped connecting seat, and the elastic folding airbag are provided with interconnected inner cavities, and the connecting seat is provided with interconnected main air ducts and connecting air ducts. The main air duct runs through the inner cavity of the muffler part. The hidden damper is arranged at the end of the main air duct close to the inner cavity of the muffler part. A vibration sensor is also provided at the corresponding end. The connecting air duct is connected to each telescopic cylinder.

[0014] Preferably, the hidden damper includes a vibration-absorbing main valve disposed at the end of the main air duct and an automatic air guide canopy movably covered at the end of the main air duct;

[0015] The automatic wind-guiding awning includes an arc-shaped folding and telescopic awning and a folding drive motor. When the folding and telescopic awning is opened, its opening faces the working part. One side of the folding and telescopic awning is fixed at the end of the main air duct away from the working part, and the other side is connected to the output shaft of the folding drive motor.

[0016] Preferably, the telescopic cylinder comprises an outer sleeve and an inner insert sleeve, and a return spring is arranged between the inner cavities of the inner insert sleeve and the outer sleeve;

[0017] A selection valve is arranged at the connection point between the connecting air duct and each telescopic cylinder.

[0018] Preferably, the automatic drum cover comprises a drum cover body and a door machine driving mechanism for driving the drum cover body to open and close;

[0019] The cylinder cover body comprises a main cover plate and a rotating cover plate rotatably embedded on the main cover plate, the rotating cover plate is provided with an active hole, a plurality of direction adjustment holes are opened on the inner side of the main cover plate, each direction adjustment hole is movably connected with the active hole, and the wind gathering and direction adjustment mechanism comprises a rotary drive mechanism for driving the rotating cover plate to rotate and a variable air guide mechanism covered on the outer side of the active hole;

[0020] The variable air guide mechanism comprises a fixing ring arranged outside the active hole, a folding sleeve is sleeved on the inner hole of the fixing ring, and a direction-changing driving mechanism for driving the end surface of the folding sleeve to move is arranged on one side of the fixing ring.

[0021] Preferably, the rotary drive mechanism comprises a rotary drive motor embedded in the main cover plate and a gear arranged on the output shaft of the rotary motor. A driven rack is arranged on the outer circumference of the rotary cover plate close to one side, and the gear meshes with the driven rack.

[0022] Preferably, the direction-changing drive mechanism includes a flipping motor and two L-shaped connecting rods, one end of the two connecting rods are respectively connected to the symmetrical sides of the end surface of the folding sleeve, the other end of one of the connecting rods is connected to the output shaft of the flipping motor, and the other end of the other connecting rod is rotatably connected to the other side of the flipping motor symmetrical to the output shaft.

[0023] Preferably, there are three vibration-absorbing warning mechanisms, which are respectively arranged on both sides and the bottom of the outer wall of the sound-absorbing part.

[0024] Preferably, an airtight rubber ring is provided on the inner side of the automatic drum cover close to its outer circumference.

[0025] The present application also provides a method for controlling a tunnel fan, the specific method is as follows:

[0026] S100: After receiving the vortex or swirl position information detected by the external sensor, the fan control system controls the wind gathering and direction adjustment mechanism to adjust the direction of the air outlet of the fan body, controls the fan body to exhaust air toward the corresponding position, and disperses the vortex or swirl;

[0027] S200: When the fan control system receives a signal from the vibration sensor that the fan is vibrating internally, it controls the hidden damper of the vibration suppression warning mechanism to open, and directs the internal wind force into the pneumatic telescopic mechanism.

[0028] S300: When the fan control system receives an external control command, it controls the wind gathering and direction adjustment mechanism to adjust the direction of the fan body air outlet, purge the tunnel side wall, or perform other operations that require adjusting the fan exhaust direction;

[0029] S400: When the fan control system receives the vehicle speeding information detected by the external sensor, it controls the hidden damper of the vibration reduction warning mechanism to open, and introduces the internal wind force into the pneumatic telescopic mechanism, and warns the vehicle through the extension and retraction of the pneumatic telescopic mechanism.

[0030] Compared with the prior art, the beneficial effects of this application are:

[0031] (1) The vibration-absorbing warning mechanism of the present application can guide the internal airflow to the pneumatic telescopic mechanism, change the internal gas flow direction, help eliminate the turbulence caused by the unstable internal airflow, and buffer the impact of the internal airflow on the side wall of the fan, especially the side wall of the muffler part, through the expansion and contraction of the pneumatic telescopic mechanism, thereby improving the service life of the fan; at the same time, the internal airflow can be actively guided to the pneumatic telescopic mechanism, and the warning light bar can be driven to move through its expansion and contraction to provide a light warning to speeding vehicles.

[0032] (2) The wind focusing and direction-adjusting mechanism of the present application can adjust the direction of the air outlet and accelerate the wind speed of the fan by reducing the inner diameter of the air outlet. After receiving the vortex and swirl position information detected by the external sensor, the wind focusing and direction-adjusting mechanism is controlled to adjust the direction of the air outlet of the fan body, and the fan body is controlled to exhaust air toward the corresponding position to break up the vortex or swirl. In addition, the wind focusing and direction-adjusting mechanism can be controlled to flexibly blow during operations such as cleaning tunnels, thereby expanding the use scenarios of tunnel fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0034] Figure 1 This is the overall structure front view of this application.

[0035] Figure 2 This is a side view of the overall structure of this application.

[0036] Figure 3 This is a schematic diagram of the automatic drum cover opening state of this application.

[0037] Figure 4 This is a bottom view of the overall structure of this application.

[0038] Figure 5 This is a top view of the automatic drum cover of this application.

[0039] Figure 6 This is a cross-sectional view of the automatic drum cover of this application.

[0040] Figure 7 This is a partial enlarged view A of this application.

[0041] Figure 8 This is the enlarged partial view B of this application.

[0042] Fig. 9 This is a cross-sectional view of the vibration elimination warning mechanism of the present application.

[0043] In the figure:

[0044] 1. Fan body, 2. Fixed arc plate, 3. Cylinder cover body, 4. Door machine drive mechanism, 5. Vibration elimination warning mechanism, 11. Operation part, 12. Silence part, 31. Main cover plate, 32. Rotating cover plate, 33. Rotary drive motor, 34. Variable air guide mechanism, 41. Drive seat, 42. Connecting rod, 51. Connecting seat, 52. Telescopic cylinder, 53. Arc connecting seat, 54. Elastic folding airbag, 55. Automatic air guide canopy, 56. Vibration elimination main valve;

[0045] 311. Direction adjustment hole; 312. Airtight rubber ring; 321. Active hole; 322. Exhaust valve; 323. Driven rack; 341. Fixed ring; 342. Folding sleeve; 343. Flip motor; 344. Connecting rod; 511. Air duct; 512. Selector valve; 521. Return spring; 541. Warning light bar. DETAILED DESCRIPTION

[0046] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure and should not be understood as limitations on the present disclosure.

[0049] Example 1

[0050] like Figures 1 to 4 As shown, the present application provides a tunnel fan, including a fixed arc plate 2 and a fan body 1, wherein the fan body 1 includes an operating part 11 and a muffler part 12 arranged on both sides of the operating part 11, an automatic cylinder cover is arranged at the end of the muffler part 12, and also includes a vibration elimination warning mechanism and a wind gathering and direction adjustment mechanism, which are specifically as follows:

[0051] A vibration-absorbing warning mechanism is arranged on the outer periphery of the muffler 12, including a vibration sensor arranged in the inner cavity of the muffler 12, a hidden damper, and a pneumatic telescopic mechanism arranged on the outer periphery of the muffler 12, and a warning light bar 541 is arranged on the pneumatic telescopic mechanism;

[0052] The wind gathering and direction adjustment mechanism is arranged on the automatic cylinder cover.

[0053] Specifically, the pneumatic telescopic mechanism includes a connecting seat 51 embedded in the outer peripheral side wall of the muffler part 12, and a plurality of telescopic cylinders 52 are vertically arranged on the end surface of the connecting seat 51 away from the muffler part 12, and an arc-shaped connecting seat 53 is arranged at the end of the telescopic part of the telescopic cylinder 52, and elastic folded airbags 54 are arranged on both sides of the extension direction of the arc-shaped connecting seat 53. The warning light bar 541 is arranged on the outer periphery of the elastic folded airbag 54, and the telescopic cylinder 52, the arc-shaped connecting seat 53, and the elastic folded airbag 54 are internally provided with interconnected inner cavities, and the connecting seat 51 is internally provided with a main air duct and a connecting air duct 511 that are interconnected, and the main air duct runs through the inner cavity of the muffler part 12, and the hidden damper is arranged at the end of the main air duct close to the inner cavity of the muffler part 12, and a vibration sensor is also provided at the corresponding end, and the connecting air duct 511 is connected to each telescopic cylinder 52.

[0054] When the vibration sensor detects the internal vibration of the fan, the fan control system opens the hidden damper, and the internal wind force passes through the hidden damper, the main air duct, the connecting air duct 511, and the telescopic tube 52 to the elastic folding airbag 54, thereby changing the direction of the airflow inside the fan and eliminating the internal turbulence. At the same time, the elastic folding airbag 54 stretches to drive the warning light bar 541 to operate, which can provide light warnings to nearby vehicles.

[0055] Specifically, the hidden damper includes a vibration-damping main valve 56 arranged at the end of the main air duct and an automatic air guide canopy 55 movably covered at the end of the main air duct. The automatic air guide canopy 55 includes an arc-shaped folding and telescopic canopy and a folding drive motor. When the folding and telescopic canopy is opened, its opening faces the working part 11. One side of the folding and telescopic canopy is fixed at the end of the main air duct away from the working part 11, and the other side is connected to the output shaft of the folding drive motor.

[0056] The automatic wind guide tent 55 can effectively guide the airflow inside the fan when it is opened, and will not affect the normal operation of the internal airflow when it is closed, thereby reducing the impact on the normal operation of the fan. Figure 7 The automatic wind guide awning 55 shown is widely used in the fields of electric awnings, rainproof awnings, etc., and the specific structure will not be repeated in this application.

[0057] Furthermore, the telescopic cylinder 52 includes an outer sleeve and an inner insert sleeve, a return spring 521 is provided between the inner cavities of the inner insert sleeve and the outer sleeve, and a selection valve 512 is provided at the connection point between the connecting air duct 511 and each telescopic cylinder 52 .

[0058] The return spring 521 is used for the elastic extension and retraction of the telescopic tube 52, increasing the movement amplitude of the warning light bar of the elastic folded airbag 54. The alternating opening and closing of the selection valve 512 helps the alternating extension and retraction of each telescopic tube 52 and the elastic folded airbag 54, thereby improving the warning effect on the vehicle.

[0059] Specifically, the automatic drum cover comprises a drum cover body 3 and a door machine driving mechanism 4 for driving the drum cover body 3 to open and close.

[0060] like Figure 2 As shown, the door machine driving mechanism 4 includes a driving seat 41 arranged on the fixed arc plate 2 and a connecting rod 42 connected to the cylinder cover body 3, the driving seat includes two fixed sub-seats, and the opposite end faces thereof are provided with connecting shafts, one of the fixed sub-seats is provided with a door machine motor for driving the connecting shaft to rotate, and the connecting rod 42 is sleeved on the connecting shaft.

[0061] Specifically, the barrel cover body 3 includes a main cover plate 31 and a rotating cover plate 32 rotatably embedded on the main cover plate 31, the rotating cover plate 32 is provided with an active hole 321, and a plurality of adjustment holes 311 are opened on the inner side of the main cover plate 31, and each adjustment hole 311 is movably connected with the active hole 321. The wind gathering and adjustment mechanism includes a rotary drive mechanism for driving the rotating cover plate 32 to rotate and a variable air guide mechanism 34 covered on the outer side of the active hole 321.

[0062] The variable air guide mechanism 34 includes a fixing ring 341 disposed outside the active hole 321 , a folding sleeve 342 is sleeved on the inner hole of the fixing ring 341 , and a direction-changing driving mechanism for driving the end surface of the folding sleeve 342 to move is disposed on one side of the fixing ring 341 .

[0063] The rotary drive mechanism includes a rotary drive motor 33 embedded in the main cover plate 31 and a gear arranged on the output shaft of the rotary motor. A driven rack 323 is arranged on the outer circumference of the rotary cover plate 32 near one side, and the gear is meshed with the driven rack 323 .

[0064] The direction-changing drive mechanism includes a flipping motor 343 and two L-shaped connecting rods 344, one end of the two connecting rods 344 are respectively connected to the symmetrical two sides of the end surface of the folding sleeve 342, the other end of one of the connecting rods 344 is connected to the output shaft of the flipping motor 343, and the other end of the other connecting rod 344 is rotatably connected to the other side of the flipping motor 343 symmetrical to the output shaft.

[0065] like Figures 3 to 6As shown, the central axes of the main cover plate 31 and the rotating cover plate 32 are colinear, and the adjustment holes 311 are evenly distributed around the central axis of the main cover plate 31. The distance between them and the central axis of the main cover plate 31 is consistent with the distance between the active hole 321 and the rotating cover plate 32. The fixing ring 341 is located on the connecting line between the flip motor 343 and the central axis of the main cover plate 31. When it is necessary to adjust the port orientation of the folding sleeve 342, the rotary drive motor 33 drives the rotating cover plate 32 to rotate, so that the active hole 321 is connected with the adjustment hole 311 at the appropriate position, and the flip motor 343 then drives the port of the folding sleeve 342 to rotate through the L-shaped connecting rod 344, so that the orientation of the port of the folding sleeve 342 can be flexibly adjusted.

[0066] The wind gathering and direction-adjusting mechanism of the present application can adjust the direction of the air outlet and accelerate the wind speed of the fan by reducing the inner diameter of the air outlet. After receiving the vortex and swirl position information detected by the external sensor, the wind gathering and direction-adjusting mechanism is controlled to adjust the direction of the air outlet of the fan body 1, and the fan body 1 is controlled to exhaust air toward the corresponding position to break up the vortex or swirl. In addition, the wind gathering and direction-adjusting mechanism can be controlled to blow flexibly during operations such as cleaning tunnels, thereby expanding the use scenarios of tunnel fans.

[0067] Preferably, an exhaust valve 322 is disposed inside the active hole 321 to improve flexibility when using the variable air guide mechanism 34 .

[0068] Furthermore, there are three vibration-absorbing warning mechanisms, which are respectively arranged on both sides and the bottom of the outer wall of the muffler part 12, and an airtight rubber ring 312 is arranged on the inner side of the automatic cylinder cover near its outer circumference.

[0069] Based on the above tunnel fan, the present application also provides a control method for the tunnel fan, the specific method is:

[0070] S100: After receiving the eddy current or swirl position information detected by the external sensor, the fan control system controls the wind gathering and direction adjustment mechanism to adjust the direction of the air outlet of the fan body 1, controls the fan body 1 to exhaust air toward the corresponding position, and breaks up the eddy current or swirl;

[0071] S200: When the fan control system receives a signal from the vibration sensor that the fan is vibrating internally, it controls the hidden damper of the vibration suppression warning mechanism to open, and directs the internal wind force into the pneumatic telescopic mechanism.

[0072] S300: When the fan control system receives an external control command, it controls the wind gathering and direction adjustment mechanism to adjust the direction of the air outlet of the fan body 1, to purge the tunnel side wall or perform other operations that require adjusting the exhaust direction of the fan;

[0073] S400: When the fan control system receives the vehicle speeding information detected by the external sensor, it controls the hidden damper of the vibration reduction warning mechanism to open, and introduces the internal wind force into the pneumatic telescopic mechanism, and warns the vehicle through the extension and retraction of the pneumatic telescopic mechanism.

[0074] In the step S100, the method of detecting the eddy current and swirl position information by the external sensor includes infrared measurement of the temperature distribution of the flowing air, ultrasonic measurement of the air flow rate at each position, etc.

[0075] In the step S300, other operations that require adjustment of the exhaust direction of the fan include adjusting the exhaust direction of the fan as needed when the present application is set at a fork in the tunnel, thereby avoiding the inconvenience of moving the fan as a whole.

[0076] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0077] Although the above describes the specific implementation methods of the present application in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present application. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present application, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present application.

Claims

1. A tunnel fan, comprising a fixed arc plate (2) and a fan body (1), wherein the fan body (1) comprises an operating part (11) and a muffler part (12) arranged on both sides of the operating part (11), and an automatic cylinder cover is arranged at the end of the muffler part (12), characterized in that: A vibration-absorbing warning mechanism is arranged on the periphery of the muffler (12), comprising a vibration sensor arranged in the inner cavity of the muffler (12), a hidden damper, and a pneumatic telescopic mechanism arranged on the periphery of the muffler (12), wherein a warning light bar (541) is arranged on the pneumatic telescopic mechanism; The wind gathering and direction adjustment mechanism is arranged on the automatic cylinder cover.

2. A tunnel fan according to claim 1, characterized in that: The pneumatic telescopic mechanism comprises a connecting seat (51) embedded in the outer peripheral side wall of the muffler (12), a plurality of telescopic cylinders (52) are vertically arranged on the end surface of the connecting seat (51) away from the muffler (12), an arc-shaped connecting seat (53) is arranged at the telescopic end of the telescopic cylinder (52), elastic folding airbags (54) are arranged on both sides of the extending direction of the arc-shaped connecting seat (53), and the warning light bar (541) is arranged on the outer periphery of the elastic folding airbag (54); The telescopic cylinder (52), the arc-shaped connecting seat (53), and the elastic folding airbag (54) are provided with inner cavities that are interconnected, and the connecting seat (51) is provided with a main air duct and a connecting air duct (511) that are interconnected. The main air duct runs through the inner cavity of the muffler (12). The hidden air door is provided at the end of the main air duct close to the inner cavity of the muffler (12). A vibration sensor is also provided at the corresponding end. The connecting air duct (511) is connected to each telescopic cylinder (52).

3. A tunnel fan according to claim 2, characterized in that: The hidden air door comprises a vibration-damping main valve (56) arranged at the end of the main air duct and an automatic air guide canopy (55) movably covered at the end of the main air duct; The automatic wind guide awning (55) comprises an arc-shaped folding telescopic awning and a folding drive motor. When the folding telescopic awning is opened, its opening faces the working part (11). One side of the folding telescopic awning is fixedly arranged at the end of the main air duct away from the working part (11), and the other side is connected to the output shaft of the folding drive motor.

4. A tunnel fan according to claim 2, characterized in that: The telescopic cylinder (52) comprises an outer sleeve and an inner insert cylinder, and a return spring (521) is arranged between the inner cavities of the inner insert cylinder and the outer sleeve; A selection valve (512) is provided at the connection point between the connecting air passage (511) and each telescopic cylinder (52).

5. A tunnel fan according to claim 1, characterized in that: The automatic drum cover comprises a drum cover body (3) and a door machine driving mechanism (4) for driving the drum cover body (3) to open and close; The cylinder cover body (3) comprises a main cover plate (31) and a rotating cover plate (32) rotatably embedded on the main cover plate (31); an active hole (321) is provided on the rotating cover plate (32); a plurality of direction adjustment holes (311) are provided on the inner side of the main cover plate (31); each direction adjustment hole (311) is movably connected with the active hole (321); the wind gathering and direction adjustment mechanism comprises a rotation drive mechanism for driving the rotating cover plate (32) to rotate and a variable air guide mechanism (34) covered on the outer side of the active hole (321); The variable air guide mechanism (34) comprises a fixed ring (341) arranged outside the active hole (321), a folding sleeve (342) is sleeved on the inner hole of the fixed ring (341), and a direction-changing driving mechanism for driving the end surface of the folding sleeve (342) to move is arranged on one side of the fixed ring (341).

6. A tunnel fan according to claim 5, characterized in that: The rotary drive mechanism comprises a rotary drive motor (33) embedded in the main cover plate (31) and a gear arranged on the output shaft of the rotary motor; a driven rack (323) is arranged on the outer circumference of one side of the rotary cover plate (32); and the gear is meshed with the driven rack (323).

7. A tunnel fan according to claim 5, characterized in that: The direction-changing drive mechanism comprises a flip motor (343) and two L-shaped connecting rods (344), one end of the two connecting rods (344) are respectively connected to two symmetrical sides of the end surface of the folding sleeve (342), the other end of one of the connecting rods (344) is connected to the output shaft of the flip motor (343), and the other end of the other connecting rod (344) is rotatably connected to the other side of the flip motor (343) symmetrical to the output shaft.

8. The tunnel fan according to claim 1, characterized in that: There are three vibration-damping warning mechanisms, which are respectively arranged on both sides and the bottom of the outer side wall of the sound-damping part (12).

9. The tunnel fan according to claim 1, characterized in that: An airtight rubber ring (312) is arranged on the inner side of the automatic cylinder cover near its outer circumference.

10. The control method of a tunnel fan according to claims 1 to 9, characterized in that: S100: After receiving the eddy or swirl position information detected by the external sensor, the fan control system controls the wind gathering and direction adjustment mechanism to adjust the direction of the air outlet of the fan body (1), controls the fan body (1) to exhaust air toward the corresponding position, and breaks up the eddy or swirl; S200: When the fan control system receives a signal from the vibration sensor that the fan is vibrating internally, it controls the hidden damper of the vibration suppression warning mechanism to open, and directs the internal wind force into the pneumatic telescopic mechanism. S300: When the fan control system receives an external control command, it controls the wind gathering and direction adjustment mechanism to adjust the direction of the air outlet of the fan body (1) to purge the tunnel side wall or perform other operations that require adjusting the exhaust direction of the fan; S400: When the fan control system receives the vehicle speeding information detected by the external sensor, it controls the hidden damper of the vibration reduction warning mechanism to open, and introduces the internal wind force into the pneumatic telescopic mechanism, and warns the vehicle through the extension and retraction of the pneumatic telescopic mechanism.

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