A tunnel ventilation air duct arrangement

Abstract

This utility model relates to the technical field of ventilation equipment for tunnel construction, and discloses a ventilation duct device for tunnels, including multiple duct bodies connected in sequence. A main zipper connects the first and second duct bodies in adjacent duct bodies. An inner sealing element is connected to the inner wall of the end of the first duct body, extending into the end of the second duct body. A flexible outer sealing strip for covering the main zipper is connected between adjacent duct bodies. One side of the flexible outer sealing strip is fixedly connected to the outer side of the end of one of the duct bodies, and a fixing mechanism is detachably connected between the two ends of the flexible outer sealing strip. This utility model patent solves the problem of air leakage in existing tunnel ventilation ducts during use by setting the inner sealing element and the flexible outer sealing strip.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation equipment for tunnel construction, and specifically to a ventilation duct device for tunnel ventilation. Background Technology

[0002] Ventilation ducts are installed during tunnel construction to supply fresh air into the tunnel or expel stale air, ensuring safe tunnel construction. Currently, ventilation ducts consist of multiple air ducts connected sequentially along the tunnel's length. For ease of connection and installation, adjacent air ducts are currently connected via a zipper structure. To ensure structural stability, support rings are installed on the inner wall of each air duct end, and the zipper is then fixed to the outside of these support rings. Connecting adjacent air ducts is as simple as pulling or closing the zipper.

[0003] While existing technologies using zippers can connect adjacent ventilation ducts, they present several problems in practical use: 1. The zipper structure is exposed, affecting the aesthetics of the connection; 2. Gaps exist in the zipper after it is closed, leading to air leakage during use; 3. The exposed zipper is susceptible to damage from external impacts and the significant tensile forces it experiences during use, resulting in unstable connections and air leakage. Therefore, it is necessary to improve the existing structure connecting adjacent ventilation ducts to enhance structural stability and improve sealing against air leakage. Utility Model Content

[0004] The present invention aims to provide a ventilation duct device for tunnels to solve the problem of air leakage in existing tunnel ventilation ducts during use.

[0005] To solve the above problems, the present invention adopts the following technical solution: a ventilation duct device for tunnels, comprising multiple ventilation duct bodies connected in sequence, a main zipper connecting the first and second ventilation duct bodies in adjacent ventilation duct bodies, an inner sealing element connected to the inner wall of the end of the first ventilation duct body, the inner sealing element extending into the end of the second ventilation duct body; a flexible outer sealing strip for shielding and covering the main zipper connecting adjacent ventilation duct bodies, one side of the flexible outer sealing strip being fixedly connected to the outer side of the end of one of the ventilation duct bodies, and a fixing mechanism being detachably connected between the two ends of the flexible outer sealing strip.

[0006] The principles and beneficial effects of this application are as follows:

[0007] In this application, the adjacent first and second ventilation duct bodies are connected by a main zipper. At the same time, an inner sealing element is connected to the inner wall of the end of the first ventilation duct body, and the side of the inner sealing element away from the first ventilation duct body extends into the second ventilation duct body. Therefore, when the first and second ventilation duct bodies are connected by the main zipper, the inner sealing element can play an auxiliary sealing role on the main zipper position from the inside of the ventilation duct formed by the first and second ventilation duct bodies, reducing air leakage at the main zipper position and improving the tunnel ventilation quality.

[0008] In addition, this application includes a flexible outer sealing strip connecting adjacent duct bodies. One side of the flexible outer sealing strip is fixedly connected to one of the duct bodies. When the main zipper is operated to connect the first and second duct bodies, the flexible outer sealing strip can be flipped to the outside of the duct body fixedly connected to one side, allowing the operator to easily pull the main zipper. After the first and second duct bodies are fixed together by the main zipper, the flexible outer sealing strip can be flipped to the outside of the connection end between the first and second duct bodies, and the two ends of the flexible outer sealing strip are fixedly connected using a fixing mechanism. This allows the flexible outer sealing strip to cover the main zipper, preventing it from being exposed during use. This not only improves the appearance quality of the connected duct bodies but also protects the main zipper, ensuring a stable and long-term seal between adjacent duct bodies. Furthermore, fixing the flexible outer sealing strip in this application also provides auxiliary sealing for the main zipper, further enhancing the sealing effect at the connection point of adjacent duct bodies and effectively ensuring ventilation stability.

[0009] Preferably, as an improvement, the main zipper includes a first fabric strip, a second fabric strip, zipper teeth, and a zipper head. An inner support ring is fixedly connected to the inner wall of the end of the first air duct body. The first fabric strip and the zipper head are connected to the end of the first air duct body, and the second fabric strip is connected to the end of the second air duct body.

[0010] In this solution, an inner support ring is fixedly connected to the inner wall of the end of the first air duct body. The inner support ring supports the first air duct body. Then, the first fabric tape and the pull head are connected to the end of the first air duct body. The inner support ring can also support the first fabric tape and the pull head. When the main zipper is manually pulled and closed, it is easier to apply force to complete the pulling and sealing of the main zipper.

[0011] Preferably, as an improvement, the inner sealing element includes an inner annular cloth strip, one side of which is fixedly connected to the first air duct body, and the other side is inserted into the second air duct body.

[0012] In this design, the inner sealing element is an inner annular cloth strip in the shape of a ring. When in use, the inner annular cloth strip acts as a shielding and auxiliary sealing element along the annular seam connecting the first and second air duct bodies to the area connected by the main zipper. The structure is simple and the sealing effect is obvious.

[0013] Preferably, as an improvement, the ventilation direction within the first and second duct bodies is from the first duct body to the second duct body.

[0014] In this design, after the first and second air duct bodies are connected, the internal ventilation direction is from the first air duct body to the second air duct body. One side of the inner annular cloth strip is fixedly connected to the first air duct body. Therefore, the gas flowing inside flows from the side where the inner annular cloth strip is fixed to the first air duct body to the other side. The inner annular cloth strip automatically adheres to the inner wall of the first and second air duct bodies under the pressure of the airflow, which can better achieve the sealing and leak-proof effect.

[0015] Preferably, as an improvement, the inner support ring is located between the first air duct body and the inner annular fabric strip.

[0016] In this design, the inner support ring is placed between the first duct body and the inner annular fabric strip, which can prevent the inner support ring from being in contact with the ventilation airflow for a long time and can play a certain auxiliary protection role for the inner support ring.

[0017] Preferably, as an improvement, the fixing mechanism includes Velcro disposed between the two ends of the flexible outer sealing strip.

[0018] In this solution, the fixing mechanism uses Velcro, which has a simple structure and is easy to fix. When it is necessary to connect the two ends of the flexible outer sealing strip, the bonding connection can be completed quickly.

[0019] Preferably, as an improvement, the fixing mechanism includes a hook and a hanging hole that are engaged with each other, the hook being fixedly connected to one end of the flexible outer sealing strip, and the hanging hole being located at the other end of the flexible outer sealing strip.

[0020] The fixing mechanism in this solution includes hooks and holes that engage with each other, which can more securely connect the two ends of the flexible outer sealing strip. Even under the action of a small external force, the two ends of the flexible outer sealing strip will remain connected under the action of the hooks, thereby ensuring that the flexible outer sealing strip can provide stable protection for the main zipper.

[0021] Preferably, as an improvement, the number of hooks is at least two, and all hooks are arranged along the width direction of the flexible outer sealing strip.

[0022] In this solution, multiple hooks are installed to further improve the stability of the connection between the two ends of the flexible outer sealing strip.

[0023] Preferably, as an improvement, one side of the flexible outer sealing strip is fixedly connected to the second air duct body.

[0024] In this solution, one side of the flexible outer sealing strip is fixedly connected to the second duct body, and one side of the inner annular cloth strip is fixedly connected to the first duct body. This results in additional cloth strip structures being fixedly connected to the ends of both the first and second duct bodies, making the end structures of the first and second duct bodies more stable and facilitating quick and stable connection between the ends of adjacent duct bodies.

[0025] Preferably, as an improvement, an auxiliary zipper is connected between the side of the flexible outer sealing strip away from the second air duct body and the first air duct body.

[0026] In this design, an auxiliary zipper is connected between the flexible outer sealing strip and the first air duct body on the side away from the second air duct body. This makes the flexible outer sealing strip better at blocking and sealing the main zipper. After the flexible outer sealing strip is connected, it fits neatly on the outside of the first and second air duct bodies, making the overall appearance more regular. At the same time, the connection between the ends of the first and second air duct bodies is also more stable. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the connection between the first and second air duct bodies in Embodiment 1 of this utility model.

[0028] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 for Figure 2 Sectional view along the middle AA.

[0030] Figure 4 This is a schematic diagram of the flexible outer sealing strip in Embodiment 1 of this utility model.

[0031] Figure 5 This is a schematic diagram of the flexible outer sealing strip in Embodiment 2 of this utility model.

[0032] Figure 6 The same as in Embodiment 3 of this utility model Figure 1 A magnified view of a portion of point A in the middle. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method:

[0034] The reference numerals in the accompanying drawings include: first air duct body 1, second air duct body 2, main zipper 3, first fabric tape 301, second fabric tape 302, zipper teeth 303, zipper head 304, inner support ring 4, inner annular fabric tape 5, flexible outer sealing tape 6, Velcro 7, hook 8, auxiliary zipper 9.

[0035] Example 1

[0036] This embodiment is as shown in the attached figure. Figure 1 As shown: A tunnel ventilation duct device includes multiple duct bodies connected in sequence, wherein two adjacent duct bodies are respectively a first duct body 1 and a second duct body 2, combined with... Figure 2 and Figure 3 A main zipper 3 connects the end of the first ventilation duct body 1 and the end of the second ventilation duct body 2. The main zipper 3 secures the end of the first ventilation duct body 1 to the end of the second ventilation duct body 2. To facilitate a more convenient and stable connection between the first ventilation duct body 1 and the second ventilation duct body 2, in this embodiment, an annular inner support ring 4 is fixedly connected to the inner wall of the end of the first ventilation duct body 1 by bonding or covering and sewing. The inner support ring 4 can be made of a metal material with good strength, and one side of the inner support ring 4 extends beyond the end of the first ventilation body to provide better support for the main zipper 3. The main zipper 3 is located outside the inner support ring 4. Specifically, the main zipper 3 includes a first fabric strip 301, a second fabric strip 302, zipper teeth 303, and a zipper head 304. The first fabric strip 301 is sewn and fixed circumferentially along the end of the first air duct body 1, and the second fabric strip 302 is sewn and fixed circumferentially along the end of the second air duct body 2. There are two zipper teeth 303, and the two zipper teeth 303 are fixed to the first fabric strip 301 and the second fabric strip 302 respectively. The zipper head 304 is connected to the zipper strip of the first fabric strip 301.

[0037] An inner sealing element is connected to the inner wall of the end of the first air duct body 1, and the inner sealing element extends into the end of the second air duct body 2. Figure 2 and Figure 3 The inner sealing element includes an inner annular fabric strip 5 in the shape of a ring. The inner annular fabric strip 5 is made of the same material as the air duct body. One side of the inner annular fabric strip 5 is fixedly connected to the inner side of the end of the first air duct body 1 by sewing. The inner support ring 4 is located between the inner annular fabric strip 5 and the first air duct body 1. When the first air duct body 1 and the second air duct body 2 are connected to each other, the other side of the inner annular fabric strip 5 extends into the second air duct body 2. In this embodiment, after the first air duct body 1 and the second air duct body 2 are connected, the internal gas flow direction is from the first air duct body 1 to the second air duct body 2 (i.e., Figure 2(From left to right in the middle), therefore, in actual use, the side of the inner ring cloth strip 5 that is fixed to the first air duct body 1 first comes into contact with the airflow. Under the action of gas blowing and the air pressure of the flowing gas, the inner ring cloth strip 5 can be stably attached to the connection position of the ends of the first air duct body 1 and the second air duct body 2, effectively reducing air leakage during ventilation.

[0038] Combination Figure 3 and Figure 4 In this embodiment, a flexible outer sealing strip 6 for shielding and covering the main zipper 3 is connected between two adjacent air duct bodies. The material of the flexible outer sealing strip 6 is the same as that of the air duct body, such as fiberglass cloth or rubber-coated cloth. One side of the flexible outer sealing strip 6 is fixedly connected to the outer wall of the end of the second air duct body 2 by sewing. The other side of the flexible outer sealing strip 6 can be folded relative to the second air duct body 2 to adjust its position, and can be rotated to fit against the outer wall of the end of the first air duct body 1 (e.g., ...). Figure 2 The flexible outer sealing strip 6 covers and seals the main zipper 3 circumferentially. Simultaneously, to ensure the flexible outer sealing strip 6 stably covers and seals the main zipper 3, a fixing mechanism is detachably connected between the two ends of the flexible outer sealing strip 6. In this embodiment, the fixing mechanism includes Velcro 7. The hook side of the Velcro 7 is sewn to one end of the flexible outer sealing strip 6, and the fiber side of the Velcro 7 is sewn to the other end of the flexible outer sealing strip 6. To fix both ends of the flexible outer sealing strip 6, simply attach the Velcro 7.

[0039] The specific implementation process is as follows:

[0040] In this embodiment, when installing and connecting the first air duct body 1 and the second air duct body 2, firstly, align the ends of the first air duct body 1 and the second air duct body 2. Then, insert the side of the inner annular fabric tape 5 away from the first air duct body 1 into the end of the second air duct body 2. Next, pull the pull head 304 of the main zipper 3 to make the two zipper teeth 303 engage and fix, thereby connecting and fixing the ends of the first air duct body 1 and the second air duct body 2 together. Finally, flip the flexible outer sealing tape 6 to cover the main zipper 3, and use Velcro 7 to fix both ends of the flexible outer sealing tape 6, so that the entire flexible outer sealing tape 6 fits and connects to the outside of the main zipper 3, thus completing the installation and connection of the first air duct body 1 and the second air duct body 2.

[0041] During tunnel ventilation, gas flows from the first ventilation duct body 1 to the second ventilation duct body 2. Under the action of airflow and air pressure, the inner annular cloth strip 5 can stably fit the joint at the connection end of the first ventilation duct body 1 and the second ventilation duct body 2, effectively reducing air leakage. In addition, the flexible outer sealing strip 6 is connected to the outside of the main zipper 3, which not only shields and protects the main zipper 3 and improves the appearance quality of the ventilation duct device, but also plays an auxiliary sealing role, making the connection between the first ventilation duct body 1 and the second ventilation duct body 2 more airtight, thus better completing the tunnel ventilation work.

[0042] Example 2

[0043] The difference between Example 2 and Example 1 is that the fixing mechanism in Example 1 is Velcro 7, such as... Figure 5 As shown, in this embodiment, the fixing mechanism consists of hooks 8 and hanging holes that are connected to each other. The hooks 8 are fixedly connected to one end of the flexible outer sealing strip 6 by means of bonding, snapping, etc., and the hanging holes are opened at the other end of the flexible outer sealing strip 6. In order to improve the stability when the two ends of the flexible outer sealing strip 6 are connected, there are multiple hooks 8 in this embodiment. The multiple hooks 8 are evenly spaced along the width direction of the flexible outer sealing strip 6.

[0044] In Embodiment 1, the fixing mechanism uses Velcro 7, which can easily bond and fix the two ends of the flexible outer sealing strip 6. However, the flexible outer sealing strip 6 is prone to loosening when subjected to pulling or other forces from other objects. In this embodiment, hooks 8 are used to attach to the hanging holes, making the connection between the two ends of the flexible outer sealing strip 6 more stable. Even if subjected to external forces, it will not easily loosen, effectively ensuring the protective function of the flexible outer sealing strip 6 on the main zipper 3.

[0045] Example 3

[0046] The difference between Example 3 and Example 1 is as follows: Figure 6As shown, in this embodiment, an auxiliary zipper 9 is connected between the flexible outer sealing strip 6 on the side away from the second air duct body 2 and the end outer wall of the first air duct body 1. The structure of the auxiliary zipper 9 is similar to that of the main zipper 3, and its specific connection method will not be described here. In this embodiment, by setting an auxiliary zipper 9 structure, after the flexible outer sealing strip 6 covers the outside of the main zipper 3, the auxiliary zipper 9 is pulled closed, making the connection between the flexible outer sealing strip 6 and the first air duct body 1 and the second air duct body 2 more stable, providing better shielding and protection for the main zipper 3, and the auxiliary sealing effect of the flexible outer sealing strip 6 is also better. Of course, in order to ensure the appearance of the air duct device and the connection cost, in this embodiment, the auxiliary zipper 9 can also be set as a hidden zipper tooth zipper structure. At the same time, the zipper teeth in the auxiliary zipper 9 are smaller than the zipper teeth 303 of the main zipper 3. It is sufficient to connect one side of the flexible outer sealing strip 6 to the outside of the first air duct body 1, without the need for the main zipper 3 to be connected to the first air duct body 1 and the second air duct body 2 and subjected to greater pulling force, effectively saving costs.

[0047] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tunnel ventilation duct apparatus comprising a plurality of duct bodies connected in series, characterized in that: A main zipper connects the first and second duct bodies in adjacent duct bodies. An inner seal is connected to the inner wall of the end of the first duct body, and the inner seal extends into the end of the second duct body. A flexible outer sealing strip is connected between adjacent duct bodies to cover the main zipper. One side of the flexible outer sealing strip is fixedly connected to the outer side of the end of one of the duct bodies, and a fixing mechanism is detachably connected between the two ends of the flexible outer sealing strip.

2. A duct for tunnel ventilation according to claim 1, characterized in that The main zipper includes a first fabric strip, a second fabric strip, zipper teeth, and a zipper head. An inner support ring is fixedly connected to the inner wall of the end of the first air duct body. The first fabric strip and the zipper head are connected to the end of the first air duct body, and the second fabric strip is connected to the end of the second air duct body.

3. A duct for tunnel ventilation according to claim 2, characterized in that: The inner sealing element includes an inner annular cloth strip, one side of which is fixedly connected to the first air duct body, and the other side is inserted into the second air duct body.

4. A duct for tunnel ventilation according to claim 3, characterized in that: The ventilation direction inside the first and second air duct bodies is from the first air duct body to the second air duct body.

5. A duct for tunnel ventilation according to claim 4, characterized in that: The inner support ring is located between the first air duct body and the inner annular fabric strip.

6. A duct for tunnel ventilation according to claim 1, characterized in that: The fixing mechanism includes Velcro straps disposed between the two ends of the flexible outer sealing strip.

7. A duct for tunnel ventilation according to claim 1, characterized in that: The fixing mechanism includes hooks and hanging holes that are connected to each other. The hooks are fixedly connected to one end of the flexible outer sealing strip, and the hanging holes are located at the other end of the flexible outer sealing strip.

8. A duct for tunnel ventilation according to claim 7, characterized in that: The number of hooks is at least two, and all hooks are arranged along the width direction of the flexible outer sealing strip.

9. A ventilation duct device for tunnel ventilation according to any one of claims 1-8, characterized in that: One side of the flexible outer sealing strip is fixedly connected to the second air duct body.

10. A duct for tunnel ventilation according to claim 9, characterized in that: An auxiliary zipper connects the flexible outer sealing strip away from the second air duct body to the first air duct body.

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