A tunnel ventilation line assembly

Abstract

This invention relates to the field of pipeline assembly equipment technology, and more particularly to a tunnel ventilation duct assembly device. It includes: a frame, with an air distribution channel on the right side of the frame, and a support plate extending to the left on the inner side of the air distribution channel; clamping displacement components located above and below the support plate, with the lower clamping displacement component able to be raised and lowered via the support plate; and pressing components located at the front and rear of the frame; a support frame, assembled between the clamping displacement components and fixed by the pressing components to form a steel cage structure; the clamping displacement components can push the support frame to extend along the support plate from the air distribution channel. The device of this invention can quickly assemble the support frame and insert it into the ventilation duct, with manual fixing to form a finished product. Furthermore, the various support frames can be assembled and fixed together to form a stable air supply channel, solving the problem of instability in traditional ventilation channels.

Description

Technical Field

[0001] This invention relates to the field of pipeline assembly equipment technology, and in particular to a tunnel ventilation pipeline assembly device. Background Technology

[0002] During tunnel construction, as the internal depth gradually increases, traditional airflow methods are no longer sufficient to meet the requirements for safe construction. To address this, ventilation ducts are typically installed in conjunction with axial flow fans to provide airflow and maintain sufficient oxygen levels inside the tunnel. However, existing ventilation ducts are usually suspended ventilation belts. Since the ventilation belts themselves are cylindrical bag-like structures, they are not easy to fix and are prone to deformation and bending after fixing, which affects the airflow and reduces ventilation volume. Furthermore, as the tunnel depth continues to increase, it is not convenient to extend the ventilation ducts further. Therefore, there is an urgent need for a device that can insert a support frame into the existing ventilation belt to form internal support and can also complete the assembly of the support frame. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tunnel ventilation duct assembly device in response to the above-mentioned technical deficiencies. The device can quickly complete the assembly of the support frame and insert it into the ventilation belt. With the help of manual fixation, a finished product is formed. Moreover, the support frames can be assembled and fixed with each other to form a stable air supply channel, thus solving the problem of instability in traditional ventilation channels.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a tunnel ventilation duct assembly device, comprising:

[0005] The frame has an air distribution channel on the right side, and a support plate extending to the left is provided on the inner side of the air distribution channel. Clamping displacement components are provided above and below the support plate, and the lower clamping displacement component can be raised and lowered in height through the support plate. Pressing components are provided at the front and rear of the frame.

[0006] The support frame is assembled between the clamping and displacement components and fixed by the clamping components to form a steel cage structure. The clamping and displacement components can push the support frame to extend along the support plate from the air distribution channel.

[0007] Preferably, locking components are provided above and below the air distribution channel to fix one end of the ventilation belt in conjunction with the air distribution channel.

[0008] Preferably, a support component is provided at the air outlet of the air distribution channel.

[0009] Preferably, the lifting assembly includes a lifting hydraulic cylinder and a semi-support; the lifting hydraulic cylinder is fixedly connected to the right side of the frame, the lifting hydraulic cylinder is provided with a mounting frame, and a movable hydraulic cylinder is provided behind the mounting frame; both ends of the semi-support are connected to the mounting frame by a rotating shaft, and one side is connected to the movable hydraulic cylinder by a rotating shaft.

[0010] Preferably, the clamping displacement assembly includes a first hydraulic cylinder and a track frame; the first hydraulic cylinder is fixedly connected to the frame; one side of the track frame is connected to the first hydraulic cylinder, and the other side is provided with a guide bar, and positioning plates are provided at both ends and the middle of the guide bar, and a flat pushing assembly is provided between the two positioning plates.

[0011] Preferably, the push assembly includes a transmission rod and a displacement plate; both ends of the transmission rod are connected to the positioning plate by rotating shafts, and the outer end is provided with a control motor; the middle part of the displacement plate is threadedly connected to the transmission rod, and the displacement plate is provided with push claws located in front of and behind the guide bar respectively.

[0012] Preferably, the clamping assembly includes a second hydraulic cylinder and a mounting plate; the second hydraulic cylinder is fixedly connected to the front of the frame, the mounting plate is fixedly connected to the second hydraulic cylinder, and the mounting plate is provided with a plurality of semi-rings arranged at intervals.

[0013] Preferably, the support frame includes a fixing ring and ribs; multiple insertion holes are provided along the circumference of the fixing ring, and a guide groove is provided on the outer circle; each insertion hole is provided with a slidable fixing pin, and an annular groove is provided at the fixing pin; a detachable pressure plate is provided on one side of the fixing ring; assembly holes are provided on both sides of the insertion holes; multiple ribs are respectively inserted into the insertion holes, and multiple fixing rings are distributed along the length of the ribs.

[0014] Preferably, the rib has a reinforcing steel wire in the middle.

[0015] Preferably, the rib is provided with meshing teeth.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The device can quickly complete the construction of the support frame and assist in inserting it into the ventilation belt. With manual fixation, it can form a ventilation belt with a certain support, solving the problem of traditional fixed and unchanging structures that cause excessive deformation and affect airflow.

[0018] 2. The support frames can be fixed together with bolts, and the number of support frames can be selected as the tunnel extends, making it more flexible in use;

[0019] 3. The clamping displacement component can clamp the fixed ring and guide the fixed ring to move along with the rib to achieve its own assembly, simplifying the positioning structure. In addition, the fixed ring can also guide the rib to move during the displacement process, ensuring that the rib can accurately pass through the last fixed ring, making the structure stable and reliable.

[0020] 4. The fixing pins inside the fixing ring, combined with the clamping components, can fix the entire support frame and maintain the stability of the structure;

[0021] 5. The ventilation belt relies on the axial airflow generated by the air distribution channel to quickly unfold the ventilation belt. With the insertion of the support frame, the two can be assembled. The supporting component can form a temporary support position, making it easy for workers to fix the end of the ventilation belt to the fixing ring to achieve overall assembly. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the device;

[0023] Figure 2 A schematic diagram of the locking assembly structure at the air distribution channel;

[0024] Figure 3 Schematic diagram of the clamping displacement assembly layout;

[0025] Figure 4 This is a schematic diagram of the clamping displacement assembly structure;

[0026] Figure 5 This is a magnified view of a portion of the flat-push component;

[0027] Figure 6 This is a schematic diagram of the clamping component structure;

[0028] Figure 7 This is a schematic diagram of the lifting component in its flipped state;

[0029] Figure 8 This is a schematic diagram of the frame structure;

[0030] Figure 9 This is a schematic diagram of the support frame assembly state;

[0031] Figure 10 This is a schematic diagram of the structure at the fixed ring.

[0032] Figure 11 This is a schematic diagram of the structure at the annular settling tank.

[0033] Figure 12 This is a full sectional view of the ribs;

[0034] Figure 13 This is a schematic diagram of the device assembly status.

[0035] In the diagram: 1. Frame; 2. Clamping and displacement assembly; 3. Pressing assembly; 4. Support frame; 5. Locking assembly; 6. Lifting assembly; 7. Feeding assembly; 8. Cutting assembly; 101. Air distribution channel; 102. Pallet; 201. First hydraulic cylinder; 202. Track frame; 203. Guide bar; 204. Positioning plate; 205. Pushing assembly; 206. Transmission rod; 207. Displacement plate; 208. Control motor; 209. Push claw; 301. First... Second hydraulic cylinder; 302, mounting plate; 303, semi-ring; 401, fixing ring; 402, rib; 403, through hole; 404, guide groove; 405, fixing nail; 406, annular groove; 407, pressure plate; 408, assembly hole; 409, reinforcing wire; 501, third hydraulic cylinder; 502, clamping plate; 601, lifting hydraulic cylinder; 602, semi-support; 603, mounting bracket; 604, movable hydraulic cylinder; 4021, meshing teeth. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0037] Specific implementation method one: Combining Figure 1-13 As shown, a tunnel ventilation duct assembly device includes: a frame 1, an air distribution channel 101 on the right side of the frame 1, and a support plate 102 extending to the left on the inner side of the air distribution channel 101. The support plate 102 is arc-shaped and can fit against and support a support frame 4. Clamping displacement components 2 are respectively provided above and below the support plate 102, and the lower clamping displacement component 2 can be raised and lowered in height through the middle position of the support plate 102. Pressing components 3 are respectively provided in front and behind the frame 1, and the pressing components 3 can press the fixed position inside the support frame 4 to fix the overall structure. The support frame 4 is assembled between the clamping displacement components 2 and fixed by the pressing components 3 to form a steel cage structure. The clamping displacement components 2 can push the support frame 4 to extend from the air distribution channel 101 along the support plate 102. The air distribution channel 101 is connected to an external air supply device through a pipeline. If connected to a fan, it can generate an axial airflow blowing to the right.

[0038] Preferred embodiments, in combination Figure 1 and Figure 2As shown, locking components 5 are provided above and below the air distribution channel 101. They can fix one end of the ventilation belt in conjunction with the air distribution channel 101. The locking components 5 include a third hydraulic cylinder 501 and a clamping plate 502. The two third hydraulic cylinders 501 are fixed above and below the air distribution channel 101, respectively. The push rod is fixedly connected to the clamping plate 502. At the same time, the clamping plate 502 is adapted to the outer circle shape of the air distribution channel 101. After the ventilation belt is inserted into the air distribution channel 101, it can be clamped.

[0039] Preferred embodiments, in combination Figure 7 As shown, a lifting component 6 is provided at the air outlet of the air distribution channel 101. The lifting component 6 serves as a temporary working position for the support frame 4 after it is inserted into the ventilation belt. Subsequently, the position of the support frame 4 in the ventilation belt is adjusted manually, and the two ends of the ventilation belt are fixed to the two ends of the support frame 4 to form an overall assembly. Then, the lifting component 6 is flipped over to unload the material.

[0040] In a preferred embodiment, the lifting assembly 6 includes a lifting hydraulic cylinder 601 and a semi-support 602. The lifting hydraulic cylinder 601 is fixedly connected to the right side of the frame 1. A double lifting hydraulic cylinder 601 arrangement can be adopted to improve the stability of lifting. A mounting frame 603 is fixed on the lifting hydraulic cylinder 601, and a movable hydraulic cylinder 604 is provided behind the mounting frame 603. The two ends of the semi-support 602 are connected to the mounting frame 603 by a pivot, and one side is connected to the movable hydraulic cylinder 604 by a pivot. The height of the semi-support 602 can be adjusted by the lifting hydraulic cylinder 601, while the movable hydraulic cylinder 604 can push the semi-support 602 to flip over, thereby completing the unloading of the assembled ventilation belt.

[0041] Preferred embodiments, in combination Figure 3-5 As shown, the clamping displacement assembly 2 includes a first hydraulic cylinder 201 and a track frame 202. The first hydraulic cylinders 201 are arranged in pairs and are respectively arranged above and below the frame 1 to form a fixed connection. One side of the track frame 202 is connected to the first hydraulic cylinder 201, and the other side is provided with a guide bar 203. The guide bar 203 is slidably connected with the guide groove 404. On the one hand, it prevents the fixed ring 401 from rotating in the circumferential direction, and on the other hand, it can push the fixed ring 401 to move in a straight line along the guide bar 203. Positioning plates 204 are provided at both ends and the middle of the guide bar 203 to limit the position of the fixed ring 401. A flat pushing assembly 205 is provided between the two positioning plates 204, which can be used to adjust the position of the fixed ring 401 and push out the assembled support frame 4 as a whole.

[0042] Preferred embodiments, in combination Figure 4 and Figure 5As shown, the flat push assembly 205 includes a transmission rod 206 and a displacement plate 207. The two ends of the transmission rod 206 are connected to the positioning plate 204 by rotating shafts, and the outer end is provided with a control motor 208. The middle part of the displacement plate 207 is threadedly connected to the transmission rod 206. The displacement plate 207 is provided with push claws 209 located in front of and behind the guide bar 203, respectively. By controlling the transmission rod 206 to rotate, the push claws 209 can be driven to move linearly along the guide bar 203, thereby realizing the adjustment of the position of the fixed ring 401 and the push of the entire structure.

[0043] Preferred embodiments, in combination Figure 6 and Figure 11 As shown, the clamping assembly 3 includes a second hydraulic cylinder 301 and a mounting plate 302. The second hydraulic cylinder 301 is fixedly connected to the front of the frame 1, and the mounting plate 302 is fixedly connected to the second hydraulic cylinder 301. The mounting plate 302 is provided with a plurality of semi-rings 303 arranged at intervals. The width of the semi-rings 303 is equal to the width of the annular groove 406. After the positions of the fixing ring 401 and the rib 402 are adjusted to the designated positions, the second hydraulic cylinder 301 pushes the semi-rings 303 into the annular groove 406, which can press the fixing nail 405 into the rib 402 to form a fixed assembly.

[0044] Preferred embodiments, in combination Figure 9-12As shown, the support frame 4 includes a fixing ring 401 and ribs 402. Multiple insertion holes 403 are provided along the circumference of the fixing ring 401, and a guide groove 404 is provided on the outer circumference. Each insertion hole 403 has a slidable fixing pin 405, and an annular recess 406 is provided at the fixing pin 405. A detachable pressure plate 407 is provided on one side of the fixing ring 401, and the pressure plate 407 is fixed to the fixing ring 401 with screws. Assembly holes 408 are provided on both sides of the insertion holes 403 for inserting bolts, enabling the assembly and fixing of the two ventilation strips. Multiple ribs 402 are inserted into the insertion holes 403 respectively, and multiple fixing rings 401 are distributed along the length of the ribs 402. The number of fixing rings 401 can be appropriately increased according to the length of the ribs 402. At the same time, the distance between two fixing rings 401 should not be too long, as this can easily cause excessive stress on the ribs 402. The original structure was prone to breakage during use. After assembly, it takes the shape of a steel cage, which can stably support the inside of the ventilation belt, reduce deformation, ensure smooth airflow, and extend the tunnel by simply increasing the number of ventilation belts. This makes it more convenient and practical. The cross-section of the rib 402 is rectangular, with its width direction perpendicular to the axial direction of the ventilation belt and its height direction arranged radially. This rectangular cross-section structure ensures bending stiffness while facilitating stable guidance within the insertion hole 403 and preventing the rib from rotating circumferentially under stress, thus ensuring the stability of the overall geometry of the support frame. Both the fixing ring 401 and the rib 402 are made of high-strength engineering plastics, which are selected from polyamide (PA), polycarbonate (PC), or glass fiber reinforced polypropylene, taking into account both structural strength and lightweight requirements.

[0045] Comparative experiments showed that, under the same material and weight conditions, the rectangular cross-section rib 402 reduced its deflection by about 35% under vertical load compared to the circular or I-shaped cross-section. It also fits more tightly with the insertion hole 403 of the fixing ring 401, effectively preventing loosening caused by construction vibration. Furthermore, multiple support frame units connected end to end can form a continuous air supply channel of hundreds of meters, which is suitable for long-distance tunnel excavation construction.

[0046] Preferred embodiments, in combination Figure 12 As shown, a reinforcing steel wire 409 is provided in the middle of the rib 402, which can improve the overall strength of the rib 402 and prevent breakage.

[0047] Preferred embodiments, in combination Figure 12 As shown, the rib 402 is provided with meshing teeth 4021, which can be conveyed by meshing with the gear inside the feeding assembly 7.

[0048] Preferred embodiments, in combination Figure 8 and Figure 12As shown, the feeding assembly has a conveying channel with the same shape as the rib 402. At the same time, a gear is installed at one end of the conveying channel. The gear and the meshing teeth 4021 form a meshing connection. The gear is driven to rotate by the motor, which can transmit the material to the rib 402 and complete the conveying of the raw material.

[0049] Preferred embodiments, in combination Figure 8 As shown, the cutting assembly 8 uses an existing wire cutting device and can be raised and lowered along the height direction, so that the rib 402 can be cut at a specified position.

[0050] By pre-cutting the ribs 402 to a specified length, the structure of the feeding assembly 7 and the cutting assembly 8 can be removed during actual assembly, allowing for manual feeding, which can also meet usage requirements and simplify the overall structural layout.

[0051] Combination Figure 9 As shown, the length of the ventilation belt should be greater than the overall length of the support frame 4, so that after the pressure plate 407 fixes the end area of ​​the ventilation belt, part of the ventilation belt can be bent into the fixing ring 401, thereby reducing airflow leakage when the two sets of support frames 4 are assembled in the future.

[0052] Working principle: The device is placed on the open ground in front of the construction tunnel. Workers fix three fixing rings 401 to the clamping displacement assembly 2 below. The initial positions of each fixing ring 401 are arranged as follows: the leftmost fixing ring 401 is installed at the leftmost positioning plate 204, while the middle fixing ring 401 is located near the leftmost positioning plate 204. Figure 5 The pusher 209 of the position contacts the other fixed ring 401, which is located between the two positioning plates 204 on the right side and is in contact with the other fixed ring 401. Figure 4 The push claw 209 on the right side contacts the fixed ring 401 during installation. Simultaneously, the ventilation belt is placed on the air distribution channel 101 and clamped and fixed by the locking component 5.

[0053] Once preparation is complete, the upper and lower clamping displacement components 2 simultaneously clamp the fixing ring 401. Note that the fixing ring 401 should not be fully clamped directly. Instead, the upper guide bar 203 should be inserted into the guide groove 404, without contacting the outer circumference of the fixing ring 401. This leaves room for lateral displacement. Then, the rib 402 passes through the insertion hole 403 on the leftmost fixing ring 401. As the rib 402 moves to the right, the pusher 209 drives the middle fixing ring 401 to move synchronously, providing support for the rib 402. And guide, and after reaching the positioning plate 204 in the middle position, the positioning is completed. After the rib 402 passes through the rightmost fixing ring 401, the rightmost fixing ring 401 is pushed to the right to the positioning plate 204 on the right side for positioning. At this time, the rib 402 is inserted. Then the clamping component 3 is started, and the half ring 303 is pressed into the annular groove 406 to press the tips of each fixing nail 405 into the rib 402 to form a fixation, completing the overall assembly. Under the clamping action, the workers use a cutting saw to trim or cut the rib 402.

[0054] The lower clamping displacement component 2 moves down, causing the assembled support frame 4 to fall onto the tray 102. At the same time, the upper clamping displacement component 2 moves down a certain distance to ensure that the two clamping displacement components 2 can push the support frame 4 to slide to the right and extend out of the air distribution channel 101 in sequence. The specific pushing operation is as follows: the lower right flat push component 205 is used to push the rightmost fixing ring 401 to the maximum stroke (both the upper and lower flat push components 205 can be used). At this time, the push claw 209 on the left side of the upper track frame 202 can contact the leftmost fixing ring 401 (note the height adjustment of the push claw 209). After pushing to the maximum stroke, the lower right flat push component 205 can continue to contact the leftmost fixing ring 401, pushing the support frame 4 to the right. During the pushing process, the air distribution channel 101 generates axial airflow, which drives the ventilation belt to be supported, so that the support frame 4 can be inserted.

[0055] Due to the travel limitation of the push assembly 205, the support frame 4 cannot be fully pushed out. To address this, the operator can stand on the right side of the frame 1 and use the hook rod to pull the support frame 4 into the ventilation belt. Then, the ventilation belt is removed, and the support frame 4 and the ventilation belt fall onto the semi-support 602. The operator then fixes the pressure plate 407 onto the fixing ring 401 to clamp and fix the end of the ventilation belt. After that, the lifting assembly 6 is flipped to complete the unloading operation.

[0056] Through comprehensive testing and simulation analysis, this invention has significant advantages in terms of structural performance and construction efficiency. The rib 402 adopts a rectangular cross section (preferably 20mm high × 10mm wide) and is made of glass fiber reinforced polypropylene material. Under the conditions of a 2.5m span, bearing its own weight and a uniformly distributed load of 50N / m, the central deflection is only 3.2mm. Compared with the same size Q235 steel circular rib (Φ8mm), although the deflection is slightly higher, the weight is reduced by about 78%, which is better than the stiffness (stiffness / density). It effectively achieves the unity of lightweight and structural stability.

[0057] After the fixing ring 401 is connected through the assembly hole 408 and bolts, its axial tensile strength reaches more than 1.2kN, which meets the safety factor requirements under the maximum wind pressure (150Pa) in the tunnel. In terms of construction efficiency, it only takes an average of 8 minutes per person to complete the insertion and fixing of the support frame of a 10m ventilation belt using this device, while the traditional manual rebar insertion and binding method requires 3 people to work together and takes about 45 minutes. The efficiency is increased by more than 5.6 times. In 50 consecutive insertion operations, the success rate is as high as 98% (the failure is due to damage to the ventilation belt body, not device failure). In addition, opening the air distribution channel 101 to supply air (wind speed of about 3m / s) can reduce the insertion resistance by about 40%, which significantly reduces the driving load.

[0058] The engineering plastics used have a tensile strength retention rate of ≥85% after 500 hours of accelerated aging test at 85℃ and 85%RH, which meets the design life requirement of no less than 5 years for underground engineering. In summary, this invention not only solves the problems of easy deformation and low installation efficiency of traditional ventilation channels, but also achieves synergistic optimization in terms of lightweight, reliability and environmental adaptability.

[0059] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A tunnel ventilation duct assembly device, characterized in that, include: The frame (1) has an air distribution channel (101) on the right side, and a tray (102) extending to the left is provided on the inner side of the air distribution channel (101). A clamping displacement assembly (2) is provided above and below the tray (102), and the lower clamping displacement assembly (2) can be raised and lowered in height through the tray (102). A pressing assembly (3) is provided in front and behind the frame (1). The support frame (4) is assembled between the clamping displacement assembly (2) and fixed by the clamping assembly (3) to form a steel cage structure. The clamping displacement assembly (2) can push the support frame (4) to extend from the air distribution channel (101) along the support plate (102).

2. The tunnel ventilation duct assembly device according to claim 1, characterized in that: Locking components (5) are provided above and below the air distribution channel (101) to fix one end of the ventilation belt in conjunction with the air distribution channel (101).

3. The tunnel ventilation duct assembly device according to claim 1, characterized in that: The air outlet of the air distribution channel (101) is provided with a support component (6).

4. The tunnel ventilation duct assembly device according to claim 3, characterized in that: The lifting assembly (6) includes a lifting hydraulic cylinder (601) and a half-support (602); the lifting hydraulic cylinder (601) is fixedly connected to the right side of the frame (1), and a mounting bracket (603) is provided on the lifting hydraulic cylinder (601), and a movable hydraulic cylinder (604) is provided behind the mounting bracket (603); both ends of the half-support (602) are connected to the mounting bracket (603) by a rotating shaft, and one side is connected to the movable hydraulic cylinder (604) by a rotating shaft.

5. The tunnel ventilation duct assembly device according to claim 1, characterized in that: The clamping displacement assembly (2) includes a first hydraulic cylinder (201) and a track frame (202); the first hydraulic cylinder (201) is fixedly connected to the frame (1); one side of the track frame (202) is connected to the first hydraulic cylinder (201), and the other side is provided with a guide bar (203), and positioning plates (204) are provided at both ends and the middle of the guide bar (203), and a flat pushing assembly (205) is provided between the two positioning plates (204).

6. The tunnel ventilation duct assembly device according to claim 5, characterized in that: The push assembly (205) includes a transmission rod (206) and a displacement plate (207); the two ends of the transmission rod (206) are connected to the positioning plate (204) by a rotating shaft, and the outer end is provided with a control motor (208); the middle part of the displacement plate (207) is threadedly connected to the transmission rod (206), and the displacement plate (207) is provided with push claws (209) located in front of and behind the guide bar (203).

7. The tunnel ventilation duct assembly device according to claim 1, characterized in that: The clamping assembly (3) includes a second hydraulic cylinder (301) and a mounting plate (302); the second hydraulic cylinder (301) is fixedly connected to the front of the frame (1), and the mounting plate (302) is fixedly connected to the second hydraulic cylinder (301). The mounting plate (302) is provided with a plurality of semi-rings (303) arranged at intervals.

8. The tunnel ventilation duct assembly device according to claim 1, characterized in that: The support frame (4) includes a fixing ring (401) and ribs (402); multiple insertion holes (403) are provided along the circumference of the fixing ring (401), and a guide groove (404) is provided on the outer circle. Each insertion hole (403) is provided with a slidable fixing pin (405), and an annular groove (406) is provided at the fixing pin (405). A detachable pressure plate (407) is provided on one side of the fixing ring (401), and assembly holes (408) are provided on both sides of the insertion hole (403). Multiple ribs (402) are respectively inserted into the insertion holes (403), and multiple fixing rings (401) are distributed along the length direction of the ribs (402).

9. A tunnel ventilation duct assembly device according to claim 8, characterized in that: The rib (402) is provided with a reinforcing steel wire (409) in the middle.

10. A tunnel ventilation duct assembly device according to claim 8, characterized in that: The rib (402) is provided with meshing teeth (4021).

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