Multi-angle adjustable ventilation fan for tunnel face

Abstract

The utility model relates to the technical field of ventilation fans, and provides a tunnel face multi-angle adjustable ventilation fan which comprises two fan pipes, an adjusting mechanism is arranged at the bottoms of the two fan pipes and used for adjusting the angles of the fan pipes, a connecting plate is arranged at the top of the adjusting mechanism, and the fan pipes are connected with the connecting plate. Mounting mechanisms are arranged on the left side and the right side of the top of the connecting plate, the mounting mechanisms are used for conveniently mounting two fan pipes, the adjusting mechanism comprises a placing box, the top of the placing box is arranged at the bottoms of the fan pipes, and a motor is fixedly connected to the front side of the top of the placing box. By means of the technical scheme, the technical problems that in the prior art, the ventilation direction is limited within a fixed range, when corners or steps or obstacles appear on the tunnel face, airflow at the fixed angle is difficult to cover all operation areas, the airflow cannot bypass the obstacles to reach dead angle areas, and the ventilation effect is remarkably reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation fan technology, specifically to a multi-angle adjustable ventilation fan for tunnel face. Background Technology

[0002] The tunnel face is the core working area in tunnel construction, and its ventilation effect directly affects the construction environment and work safety. During tunnel construction, dust, harmful gases and water vapor will be continuously generated at the tunnel face. If they are not discharged in time, they will lead to the deterioration of air quality, threaten the health of construction workers, and affect construction efficiency. By using forced airflow circulation, fresh air is sent into the tunnel face and polluted air is discharged from the tunnel.

[0003] Existing tunnel face ventilation fans mostly use a fixed-angle installation method. Their fan ducts are fixed to the tunnel structure by brackets. During operation, the fan itself is used to transport airflow in a fixed direction. The air pressure generated by the rotation of the fan blades causes the airflow to blow directly onto the tunnel face through the fan duct, achieving air circulation in the designated area and improving the air quality at the tunnel face to a certain extent. However, since the angle of the fan duct of existing fans cannot be flexibly adjusted, the ventilation direction is limited to a fixed range. When there are corners, steps, or obstacles at the tunnel face, the fixed-angle airflow is difficult to cover all working areas, causing the airflow to be unable to bypass obstacles and reach dead corner areas, which significantly reduces the ventilation effect. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a multi-angle adjustable ventilation fan for tunnel faces, which solves the technical problem that in the prior art, the ventilation direction is limited to a fixed range. When there are corners, steps or obstacles at the tunnel face, the airflow at a fixed angle is difficult to cover all working areas, resulting in the airflow being unable to bypass the obstacles and reach dead corner areas, which significantly reduces the ventilation effect.

[0005] According to one aspect, at least one embodiment of the present invention provides a multi-angle adjustable ventilation fan for a tunnel face, comprising: two fan pipes, an adjustment mechanism provided at the bottom of the two fan pipes, the adjustment mechanism being used to adjust the angle of the fan pipes, a connecting plate provided at the top of the adjustment mechanism, and mounting mechanisms provided on the left and right sides of the top of the connecting plate, the mounting mechanisms being used to facilitate the installation of the two fan pipes;

[0006] The adjustment mechanism includes a placement box, the top of which is located at the bottom of the fan pipe. A motor is fixedly connected to the front top of the placement box, and the output end of the motor passes through the front top of the fan pipe. A connecting rod is fixedly connected to the output end of the motor. A gear one is fixedly connected to the middle of the outer wall of the connecting rod. A transmission belt is meshed with the outer wall of the gear one. A gear two is meshed with the rear inner side of the transmission belt. A rotating rod is fixedly connected to the inside of the gear two. A sliding assembly is provided on the top of the placement box. The top of the rotating rod is fixedly connected to the bottom of the connecting plate. A protective assembly is provided on the front left side of the placement box.

[0007] For example, in at least one embodiment of the present invention, the multi-angle adjustable ventilation fan for the tunnel face further includes: multiple positioning blocks, the bottoms of the multiple positioning blocks being fixedly connected to the top four corners of the connecting plate, the outer walls of the two positioning blocks on the left and the two positioning blocks on the right being slidably connected to the same connecting frame, the interior of the multiple positioning blocks being provided with slots, the interiors of the two slots on the left and the two slots on the right being slidably connected to the same card plate, and the front and rear sides of the top of the two card plates being provided with anti-loosening components.

[0008] According to another aspect, at least one embodiment of the present invention also provides a multi-angle adjustable ventilation fan for tunnel face, comprising: a plurality of limiting blocks, the bottom of the plurality of limiting blocks being rotatably connected to the top of a placement box, a semi-circular groove being provided between adjacent connecting plates and the placement box, and the bottom of the plurality of limiting blocks being rotatably connected to the inside of the bottom semi-circular groove.

[0009] For example, in at least one embodiment of the present invention, the multi-angle adjustable ventilation fan for the tunnel face further includes: a hinge, the rear right side of which is fixedly connected to the front left side of the placement box, and a cover plate is fixedly connected to the front right side of the hinge.

[0010] According to another aspect, at least one embodiment of the present invention also provides a multi-angle adjustable ventilation fan for tunnel face, comprising: a buckle fastener, wherein the left side of the buckle fastener is fixedly connected to the front right side of the placement box, and a pipe clamp is fixedly connected to the right side of the cover plate.

[0011] For example, in at least one embodiment of the present invention, the multi-angle adjustable ventilation fan for the tunnel face further includes: a sealing ring, the front side of which is fixedly connected to the rear side of the cover plate, and a sealing groove is provided on the front side of the placement box.

[0012] According to another aspect, at least one embodiment of the present invention also provides a multi-angle adjustable ventilation fan for tunnel face, comprising: a plurality of bolts, the outer walls of the plurality of bolts being threadedly connected to the front and rear sides of the top of two connecting frames respectively, and two threaded holes being opened on the inner bottom of the two connecting frames respectively, and the outer walls of the plurality of bolts being threadedly connected to the inner threads of the plurality of threaded holes respectively.

[0013] For example, in at least one embodiment of the present invention, the multi-angle adjustable ventilation fan for the tunnel face further includes: a plurality of rotating beads, the bottom of which is fixedly connected to the bottom of the inner side of the semi-circular groove, and the outer walls of the plurality of limiting blocks are respectively rotatably connected between the adjacent rotating beads.

[0014] According to another aspect, at least one embodiment of the present invention also provides a multi-angle adjustable ventilation fan for tunnel face, comprising: two circular plates fixedly connected to the top of each of the two fan pipes, and lifting lugs fixedly connected to the top of each of the plurality of circular plates.

[0015] For example, in at least one embodiment of the present invention, a multi-angle adjustable ventilation fan for a tunnel face is provided, which further includes: a connecting ring fixedly connected between adjacent fan pipes, and multiple bolts threadedly connected to the opposite side of the two connecting rings.

[0016] The beneficial effects of the embodiments of this utility model are as follows:

[0017] 1. In this utility model, the starting motor drives the connecting rod and gear one to rotate, and the transmission belt meshes with gear two, causing the rotating rod to rotate, which in turn drives the placement box and fan pipe to rotate relative to the connecting plate. The sliding component reduces friction, the protective component blocks impurities, and the angle can be adjusted. This allows for flexible adjustment of the fan pipe angle, ensuring smooth and stable rotation, maintaining the stability of the internal transmission structure, meeting the needs of different ventilation directions at the tunnel face, and improving the ventilation effect.

[0018] 2. By sliding the connecting frame along the positioning block to the top of the connecting plate, inserting the card plate into the slot, the vertical and horizontal movement of the connecting frame is restricted. The anti-loosening component enhances the connection between the card plate and the slot. Disassembly can be performed by reversing the operation. This achieves a stable connection between the fan pipe and the connecting plate, which is convenient for installation and disassembly, prevents loosening caused by working vibration, ensures structural stability, and meets the installation requirements of tunnel ventilation fans. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0020] Figure 1 This is a three-dimensional view of the multi-angle adjustable ventilation fan for the tunnel face proposed in this utility model;

[0021] Figure 2 This is a front view of the multi-angle adjustable ventilation fan for the tunnel face proposed in this utility model;

[0022] Figure 3 This is a diagram of the box placed in the multi-angle adjustable ventilation fan at the tunnel face proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the gear 2 in the multi-angle adjustable ventilation fan at the tunnel face proposed in this utility model;

[0024] Figure 5 This is an exploded view of the installation mechanism in the multi-angle adjustable ventilation fan at the tunnel face proposed in this utility model;

[0025] In the diagram: 1. Fan duct; 2. Adjustment mechanism; 21. Placement box; 22. Motor; 23. Connecting rod; 24. Gear 1; 25. Transmission belt; 26. Gear 2; 27. Rotating rod; 28. Sliding assembly; 281. Semicircular groove; 282. Limiting block; 283. Rotating ball; 29. ​​Protective assembly; 291. Hinge; 292. Cover plate; 293. Clip fastener; 294. Pipe clamp; 295. Sealing ring; 296. Sealing groove; 3. Connecting plate; 4. Installation mechanism; 41. Positioning block; 42. Connecting frame; 43. Slot; 44. Clip plate; 45. Anti-loosening assembly; 451. Bolt 1; 452. Threaded hole; 5. Round plate; 6. Lifting lug; 7. Connecting ring; 8. Bolt 2. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0027] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0028] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 utility model.

[0031] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] like Figures 1-3 As shown, it illustrates a multi-angle adjustable ventilation fan for the tunnel face in one embodiment of this utility model.

[0033] In some examples, there are two fan pipes 1, and an adjustment mechanism 2 is provided at the bottom of the two fan pipes 1. The adjustment mechanism 2 is used to adjust the angle of the fan pipe 1. A connecting plate 3 is provided at the top of the adjustment mechanism 2. The left and right sides of the top of the connecting plate 3 are provided with mounting mechanisms 4. The mounting mechanisms 4 are used to facilitate the installation of the two fan pipes 1.

[0034] The adjustment mechanism 2 includes a placement box 21. The top of the placement box 21 is located at the bottom of the fan pipe 1. A motor 22 is fixedly connected to the front top of the placement box 21. The output end of the motor 22 passes through the front top of the fan pipe 1. A connecting rod 23 is fixedly connected to the output end of the motor 22. A gear 24 is fixedly connected to the middle of the outer wall of the connecting rod 23. A transmission belt 25 is meshed with the outer wall of the gear 24. A gear 26 is meshed with the rear inner side of the transmission belt 25. A rotating rod 27 is fixedly connected to the inner side of the gear 26. A sliding component 28 is provided on the top of the placement box 21. The top of the rotating rod 27 is fixedly connected to the bottom of the connecting plate 3. A protective component 29 is provided on the front left side of the placement box 21.

[0035] Specifically, when the angle of the fan pipe 1 needs to be adjusted, the motor 22 is started. The output end of the motor 22 drives the connecting rod 23 to rotate. The connecting rod 23 drives the gear 24 in the middle of the outer wall to rotate synchronously. Since the gear 24 meshes with the transmission belt 25, the rotation of the gear 24 is transmitted to the gear 26 through the transmission belt 25, so that the gear 26 rotates with the movement of the transmission belt 25. The rotating rod 27 fixed inside the gear 26 rotates synchronously with the gear 26. Since the top of the rotating rod 27 is fixed to the bottom of the connecting plate 3, the connecting plate 3 is connected to the mounting mechanism 4, and the mounting mechanism 4 is connected to the fan pipe 1, the rotation of the rotating rod 27 drives the placement box 21 to rotate relative to the connecting plate 3, thereby causing the fan pipe 1 to rotate around the axis of the rotating rod 27, thus realizing the angle adjustment.

[0036] During rotation, the sliding component 28 on the top of the placement box 21 contacts the bottom of the connecting plate 3. The sliding friction replaces the direct friction between the sliding component 28 and the connecting plate 3, reducing the friction force when the placement box 21 rotates and ensuring a smooth and stable rotation process. The protective component 29 covers the left front opening of the placement box 21, preventing external dust and impurities from entering the interior of the placement box 21 and avoiding them from adhering to the surface of gear 1 24, transmission belt 25 or gear 26, thus preventing transmission obstruction.

[0037] The motor 22 drives the connecting rod 23 and gear 24 to rotate, and the transmission belt 25 meshes with gear 26 to drive the rotation of the rotating rod 27. The fixed connection between the rotating rod 27 and the connecting plate 3 drives the placement box 21 and the fan pipe 1 to rotate relative to each other, thereby achieving angle adjustment. The friction reduction effect of the sliding component 28 ensures smooth rotation. The shielding protection of the protective component 29 maintains the stability of the internal transmission structure, allowing the adjustment mechanism 2 to flexibly adjust the angle of the fan pipe 1 to meet the needs of different ventilation directions at the tunnel face.

[0038] like Figures 2-5 As shown, it illustrates a multi-angle adjustable ventilation fan for the tunnel face in another embodiment of the present invention. The installation mechanism 4 includes multiple positioning blocks 41. The bottom of the multiple positioning blocks 41 is fixedly connected to the top four corners of the connecting plate 3. The outer walls of the two positioning blocks 41 on the left and the two positioning blocks 41 on the right are slidably connected to the same connecting frame 42. The interior of the multiple positioning blocks 41 is provided with slots 43. The interiors of the two slots 43 on the left and the two slots 43 on the right are slidably connected to the same card plate 44. The front and rear sides of the top of the two card plates 44 are provided with anti-loosening components 45.

[0039] Specifically, when installing the fan duct 1, align the connecting bracket 42 with the outer wall of the positioning block 41, slide the connecting bracket 42 downward along the positioning block 41 so that the connecting bracket 42 fits against the top of the connecting plate 3. Then, align the clamping plate 44 with the clamping groove 43 of the positioning block 41, insert the clamping plate 44 along the clamping groove 43 until the clamping plate 44 is completely embedded in the clamping groove 43. The cooperation between the clamping plate 44 and the clamping groove 43 restricts the connecting bracket 42 from sliding up and down along the positioning block 41, and the sliding cooperation between the positioning block 41 and the connecting bracket 42 restricts the horizontal displacement of the connecting bracket 42. The two work together to fix the connecting bracket 42 to the top of the connecting plate 3, thereby connecting the fan duct 1 and the connecting plate 3 through the connecting bracket 42.

[0040] After installation, operate the anti-loosening component 45. The anti-loosening component 45 cooperates with the clamping plate 44 and the positioning block 41 to enhance the connection tightness between the clamping plate 44 and the slot 43, preventing the clamping plate 44 from sliding out of the slot 43 due to vibration generated by the operation of the fan pipe 1. When it is necessary to disassemble the fan pipe 1, operate the anti-loosening component 45 in reverse to release its constraint on the clamping plate 44, pull out the clamping plate 44 along the slot 43, and then slide the connecting bracket 42 upward to make it separate from the positioning block 41, thus completing the disassembly.

[0041] The initial positioning of the connecting frame 42 is achieved through the sliding engagement of the positioning block 41 and the connecting frame 42; the connecting frame 42 is fixed through the embedded connection of the clamping plate 44 and the clamping groove 43; the clamping plate 44 is prevented from loosening through the constraint of the anti-loosening component 45, so that the installation mechanism 4 can easily complete the installation and disassembly of the fan pipe 1, while ensuring the structural stability after installation and meeting the installation requirements of the ventilation fan at the tunnel face.

[0042] like Figure 3 As shown, this invention illustrates a multi-angle adjustable ventilation fan for the tunnel face in another embodiment of the present invention. The sliding component 28 includes multiple limiting blocks 282, the bottom of which is rotatably connected to the top of the placement box 21. A semi-circular groove 281 is provided between the adjacent connecting plate 3 and the placement box 21. The bottom of the multiple limiting blocks 282 is rotatably connected to the inside of the bottom semi-circular groove 281. The protective component 29 includes a hinge 291, the rear right end of which is fixedly connected to the front left end of the placement box 21. A cover plate 292 is fixedly connected to the front right end of the hinge 291. The protective component 29 also includes a buckle fastener 293, the left side of which is fixedly connected to the front right end of the placement box 21. A pipe clamp 294 is fixedly connected to the right side of the cover plate 292. The protective component 29 also includes a sealing ring 295, the front side of which is fixedly connected to the rear side of the cover plate 292. A sealing groove 296 is provided on the front side of the placement box 21.

[0043] Specifically, when the adjusting mechanism 2 drives the placement box 21 to rotate relative to the connecting plate 3, the limiting block 282 moves synchronously with the placement box 21. Its top slides in the semi-circular groove 281 at the bottom of the connecting plate 3. The cooperation between the limiting block 282 and the two semi-circular grooves 281 converts the sliding friction between the placement box 21 and the connecting plate 3 into the rotational friction of the limiting block 282 itself, reducing the friction during rotation and ensuring that the placement box 21 and the fan pipe 1 rotate smoothly.

[0044] When protecting the internal structure, rotate the cover plate 292 around the hinge 291 so that the cover plate 292 fits against the front side of the placement box 21, and the sealing ring 295 is embedded in the sealing groove 296 to enhance the sealing performance between the cover plate 292 and the placement box 21. Then, insert the pipe clamp 294 into the buckle retainer 293. The cover plate 292 is fixed by the cooperation of the buckle retainer 293 and the pipe clamp 294, preventing external dust and moisture from entering the interior of the placement box 21 and avoiding contamination of components such as gear 24 and transmission belt 25. When it is necessary to maintain the internal structure, release the engagement between the pipe clamp 294 and the buckle retainer 293, rotate the cover plate 292 around the hinge 291 to open it, and then the internal components can be operated.

[0045] The rotation and sliding of the limiting block 282 within the semi-circular groove 281 reduces friction during the rotation of the placement box 21; the rotational cooperation between the cover plate 292 and the hinge 291, combined with the engagement of the snap fastener 293 and the pipe clamp 294, achieves closed protection for the placement box 21; the embedding of the sealing ring 295 and the sealing groove 296 enhances the sealing performance, ensuring smooth adjustment of the fan pipe 1 angle, while protecting the internal transmission structure and improving the operational stability and service life of the ventilation fan.

[0046] like Figures 2-5 As shown, it illustrates a multi-angle adjustable ventilation fan for the tunnel face in another embodiment of the present invention. The anti-loosening component 45 includes multiple bolts 451, the outer walls of which are threaded to the front and rear sides of the top of two connecting frames 42 respectively. Two threaded holes 452 are opened on the bottom inner side of each of the two connecting frames 42. The outer walls of the multiple bolts 451 are threaded to the inside of the multiple threaded holes 452 respectively. The sliding component 28 includes multiple balls 283, the bottom of which is fixedly connected to the bottom inner side of the semi-circular groove 281. The outer walls of multiple limiting blocks 282 are rotatably connected to the adjacent balls 283 respectively. Two circular plates 5 are fixedly connected to the top of each of the two fan pipes 1. Lifting lugs 6 are fixedly connected to the top of each of the multiple circular plates 5. Connecting rings 7 are fixedly connected between the adjacent fan pipes 1. Multiple bolts 8 are threadedly connected to the opposite side of each of the two connecting rings 7.

[0047] Specifically, the anti-loosening component 45 uses multiple bolts 451 as its core components. Its outer wall is threaded to the front and rear sides of the top of the two connecting brackets 42, and is threaded to the threaded hole 452 at the bottom of the inner side of the connecting bracket 42. When the clamping plate 44 is inserted into the clamping groove 43, the bolts 451 are screwed into the threaded hole 452. The end of the bolts 451 abuts against the top of the clamping plate 44, restricting the clamping plate 44 from sliding along the clamping groove 43, enhancing the tightness of the connection between the clamping plate 44 and the positioning block 41, and preventing the connecting bracket 42 from loosening.

[0048] In the sliding assembly 28, the bottom of multiple rotating beads 283 is fixed to the bottom of the inner side of the semi-circular groove 281. The outer wall of the limiting block 282 is rotatably connected between adjacent rotating beads 283. When the placement box 21 rotates relative to the connecting plate 3, the limiting block 282 moves with the placement box 21, and its outer wall contacts the rotating beads 283. The rolling of the rotating beads 283 converts the sliding friction between the limiting block 282 and the semi-circular groove 281 into rolling friction, further reducing the rotational friction and ensuring that the placement box 21 and the fan pipe 1 rotate more smoothly.

[0049] A circular plate 5 is fixed to the top of the fan pipe 1, and a lifting lug 6 is fixed to the top of the circular plate 5 to facilitate the hoisting and movement of the fan through the lifting lug 6. A connecting ring 7 is fixed to the adjacent side of the two fan pipes 1. Multiple bolts 8 are threaded to the side of the connecting ring 7 that is far away from each other. Tightening the bolts 8 makes the two connecting rings 7 fit tightly together, realizing the fixed connection of the two fan pipes 1 and ensuring stable airflow during ventilation.

[0050] The position of the clamping plate 44 is locked by the threaded connection of bolt 451 and threaded hole 452 to prevent the connecting frame 42 from loosening; the cooperation between the ball bearing 283 and the limit block 282 reduces rotational friction and ensures smooth angle adjustment; the connection between the connecting ring 7 and bolt 8 securely fixes the two fan pipes 1, improving the stability of fan installation, adjustment flexibility and structural integrity, and meeting the ventilation needs of the tunnel face.

[0051] Working principle: When installing the fan duct 1, align the connecting bracket 42 of the installation mechanism 4 with the outer wall of the positioning block 41, slide the connecting bracket 42 down along the positioning block 41 so that the connecting bracket 42 fits against the top of the connecting plate 3, then align the clamping plate 44 with the clamping groove 43 of the positioning block 41, insert the clamping plate 44 along the clamping groove 43 until the clamping plate 44 is completely embedded in the clamping groove 43. The cooperation between the clamping plate 44 and the clamping groove 43 restricts the connecting bracket 42 from sliding up and down along the positioning block 41, and the sliding cooperation between the positioning block 41 and the connecting bracket 42 restricts the horizontal displacement of the connecting bracket 42, thus fixing the connecting bracket 42 to the top of the connecting plate 3, thereby connecting the fan duct 1 and the connecting plate 3 through the connecting bracket 42;

[0052] After installation, operate the anti-loosening component 45 and screw multiple bolts 451 into the threaded holes 452 on the front and rear sides of the top of the two connecting brackets 42 respectively. The ends of the bolts 451 abut against the top of the clamping plate 44, restricting the clamping plate 44 from sliding along the groove 43, enhancing the connection tightness between the clamping plate 44 and the positioning block 41, and preventing the connecting bracket 42 from loosening due to vibration generated by the operation of the fan pipe 1. When it is necessary to disassemble the fan pipe 1, unscrew the bolts 451 in the opposite direction to release their constraint on the clamping plate 44, pull out the clamping plate 44 along the groove 43, and then slide the connecting bracket 42 upward to make it separate from the positioning block 41, thus completing the disassembly. At the same time, the adjacent sides of the two fan pipes 1 are connected and fixed by the connecting rings 7 and bolts 8. Tighten the bolts 8 to make the two connecting rings 7 fit tightly, ensuring stable airflow transmission during ventilation. The round plate 5 and the lifting lugs 6 on the top of the fan pipe 1 facilitate the hoisting and movement of the fan through the lifting lugs 6.

[0053] When the angle of the fan duct 1 needs to be adjusted, the motor 22 of the adjustment mechanism 2 is started. The output end of the motor 22 drives the connecting rod 23 to rotate. The gear 24 in the middle of the outer wall of the connecting rod 23 rotates synchronously with it. Since the gear 24 meshes with the transmission belt 25, the rotation of the gear 24 is transmitted to the gear 26 through the transmission belt 25, causing the gear 26 to rotate with the movement of the transmission belt 25. The rotating rod 27 fixed inside the gear 26 rotates synchronously with it. Since the top of the rotating rod 27 is fixed to the bottom of the connecting plate 3, the connecting plate 3 is connected to the mounting mechanism 4, and the mounting mechanism 4 is connected to the fan duct 1, the rotation of the rotating rod 27 causes the placement box 21 to rotate relative to the connecting plate 3. The fan pipe 1 rotates around the axis of the rotating rod 27 to achieve angle adjustment. During the rotation, the sliding component 28 plays a role. In the semi-circular groove 281 at the top of the placement box 21 and the bottom of the connecting plate 3, the bottom of multiple rotating balls 283 are fixed to the bottom of the inner side of the semi-circular groove 281. The outer wall of the limiting block 282 is rotatably connected between the adjacent rotating balls 283. When the placement box 21 rotates relative to the connecting plate 3, the limiting block 282 moves with the placement box 21, and its outer wall contacts the rotating balls 283. The rolling of the rotating balls 283 converts the sliding friction between the limiting block 282 and the semi-circular groove 281 into rolling friction, reducing the friction during the rotation process and ensuring that the placement box 21 and the fan pipe 1 rotate smoothly.

[0054] The protective component 29 protects the internal structure of the placement box 21. The cover plate 292 is rotated around the hinge 291 so that the cover plate 292 fits against the front side of the placement box 21. The sealing ring 295 on the rear side of the cover plate 292 is embedded in the sealing groove 296 on the front side of the placement box 21 to enhance the sealing between the cover plate 292 and the placement box 21. Then, the pipe clamp 294 on the right side of the cover plate 292 is inserted into the buckle retainer 293 at the front right side of the placement box 21 to fix the cover plate 292, preventing external dust and moisture from entering the interior of the placement box 21 and avoiding them from adhering to the surface of gear 1 24, transmission belt 25 or gear 26 to prevent transmission obstruction. When it is necessary to maintain the internal structure, the pipe clamp 294 is released from the buckle retainer 293, and the cover plate 292 is rotated around the hinge 291 to open it, so that the internal components can be operated.

[0055] It enables convenient installation and disassembly of the fan duct 1, flexible adjustment at multiple angles, and effective protection of the internal structure, ensuring stable operation of the ventilation fan and meeting the needs of different ventilation directions at the tunnel face.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-angle adjustable ventilation fan for tunnel face, comprising two fan pipes (1), characterized in that: An adjustment mechanism (2) is provided at the bottom of the two fan pipes (1). The adjustment mechanism (2) is used to adjust the angle of the fan pipe (1). A connecting plate (3) is provided at the top of the adjustment mechanism (2). An installation mechanism (4) is provided on the left and right sides of the top of the connecting plate (3). The installation mechanism (4) is used to facilitate the installation of the two fan pipes (1). The adjustment mechanism (2) includes a placement box (21), the top of which is located at the bottom of the fan pipe (1). A motor (22) is fixedly connected to the front top of the placement box (21). The output end of the motor (22) passes through the front top of the fan pipe (1). A connecting rod (23) is fixedly connected to the output end of the motor (22). A gear (24) is fixedly connected to the middle of the outer wall of the connecting rod (23). A transmission belt (25) is meshed with the outer wall of the gear (24). A gear (26) is meshed with the rear inner side of the transmission belt (25). A rotating rod (27) is fixedly connected to the inner side of the gear (26). A sliding component (28) is provided on the top of the placement box (21). The top of the rotating rod (27) is fixedly connected to the bottom of the connecting plate (3). A protective component (29) is provided on the left front end of the placement box (21).

2. The multi-angle adjustable ventilation fan for the tunnel face according to claim 1, characterized in that: The installation mechanism (4) includes multiple positioning blocks (41). The bottom of the multiple positioning blocks (41) is fixedly connected to the top four corners of the connecting plate (3). The outer walls of the two positioning blocks (41) on the left and the two positioning blocks (41) on the right are slidably connected to the same connecting frame (42). The interior of the multiple positioning blocks (41) is provided with slots (43). The interiors of the two slots (43) on the left and the two slots (43) on the right are slidably connected to the same card plate (44). The front and rear sides of the top of the two card plates (44) are provided with anti-loosening components (45).

3. The multi-angle adjustable ventilation fan for the tunnel face according to claim 1, characterized in that: The sliding component (28) includes multiple limiting blocks (282), the bottom of which is rotatably connected to the top of the placement box (21). A semi-circular groove (281) is provided between the adjacent connecting plate (3) and the placement box (21), and the bottom of which is rotatably connected to the inside of the bottom semi-circular groove (281).

4. The multi-angle adjustable ventilation fan for the tunnel face according to claim 1, characterized in that: The protective component (29) includes a hinge (291), the right rear end of which is fixedly connected to the left front end of the placement box (21), and a cover plate (292) is fixedly connected to the right front end of the hinge (291).

5. The multi-angle adjustable ventilation fan for the tunnel face according to claim 4, characterized in that: The protective component (29) also includes a snap fastener (293), the left side of which is fixedly connected to the front right side of the placement box (21), and the right side of the cover plate (292) is fixedly connected to a pipe clamp (294).

6. The multi-angle adjustable ventilation fan for the tunnel face according to claim 4, characterized in that: The protective component (29) also includes a sealing ring (295), the front side of which is fixedly connected to the rear side of the cover plate (292), and a sealing groove (296) is provided on the front side of the placement box (21).

7. The multi-angle adjustable ventilation fan for the tunnel face according to claim 2, characterized in that: The anti-loosening component (45) includes multiple bolts (451), the outer walls of the multiple bolts (451) are respectively threaded to the front and rear sides of the top of the two connecting brackets (42), and the inner bottom of the two connecting brackets (42) are provided with two threaded holes (452), and the outer walls of the multiple bolts (451) are respectively threaded to the inner threads of the multiple threaded holes (452).

8. The multi-angle adjustable ventilation fan for the tunnel face according to claim 3, characterized in that: The sliding component (28) includes multiple rotating beads (283), the bottom of which is fixedly connected to the bottom of the inner side of the semi-circular groove (281), and the outer walls of the multiple limiting blocks (282) are rotatably connected between the adjacent rotating beads (283).

9. The multi-angle adjustable ventilation fan for the tunnel face according to claim 1, characterized in that: Two circular plates (5) are fixedly connected to the top of each of the two fan pipes (1), and a lifting lug (6) is fixedly connected to the top of each of the multiple circular plates (5).

10. The multi-angle adjustable ventilation fan for the tunnel face according to claim 1, characterized in that: Each of the two fan pipes (1) is fixedly connected with a connecting ring (7), and each of the two connecting rings (7) is threaded with a plurality of bolts (8) on the opposite side.

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