Ventilation device for tunnel construction

Abstract

The utility model relates to the technical field of tunnel ventilation equipment, and discloses a ventilation device for tunnel construction, which comprises a fan, the outlet end of the fan is connected with air duct cloth, a plurality of wind scoopers are arranged on the air duct cloth at intervals along the length direction of the air duct cloth, a flow guide cavity for airflow to pass through is formed in each wind scooper, and the air duct cloth is connected with the fan. An air pipe is arranged at the bottom of the wind scooper in a communicating mode, an exhaust outlet is formed in the bottom of the air pipe, and a switch assembly for connecting or disconnecting the air pipe and the wind scooper is arranged on the wind scooper; according to the tunnel ventilation device, ventilation sites in a tunnel can be flexibly adjusted according to requirements, the construction environment in the tunnel is effectively improved, and favorable conditions are provided for construction operation in the tunnel.

Description

Technical Field

[0001] This utility model relates to the field of tunnel ventilation equipment technology, and in particular to a ventilation device for tunnel construction. Background Technology

[0002] During tunnel construction, ventilation is necessary to reduce the concentration of harmful gases and dust, and to regulate temperature and humidity, ensuring safe construction. Current technology typically uses a combination of fans and ventilation ducts to introduce fresh air into the tunnel. However, because the ventilation ducts are foldable structures made of synthetic, natural, or man-made fibers, they must be supported to allow airflow into the tunnel and out through the ends. This usually limits ventilation to the end of the duct furthest from the fan, making it difficult to ventilate other areas within the tunnel as needed, hindering the regulation of the construction environment. Therefore, there is an urgent need for a tunnel construction ventilation device that allows for flexible adjustment of ventilation points according to requirements. Utility Model Content

[0003] The purpose of this invention is to provide a ventilation device for tunnel construction, which can flexibly adjust the ventilation points inside the tunnel according to the needs, effectively improve the construction environment inside the tunnel, and provide favorable conditions for construction operations inside the tunnel.

[0004] The present invention adopts the following technical solution:

[0005] A ventilation device for tunnel construction includes a fan, an outlet end of which is connected to a duct cloth, a plurality of air guide hoods are spaced apart along the length of the duct cloth, an air guide cavity is formed inside the air guide hood for airflow to pass through, an air duct is provided at the bottom of the air guide hood, an exhaust port is opened at the bottom of the air duct, and a switch assembly is provided on the air guide hood to connect or disconnect the air duct from the air guide hood.

[0006] Preferably, a flow guide groove is provided on one side of the air guide shroud, and the air duct is connected to the flow guide groove. A connecting pipe connected to the flow guide cavity is provided in the middle of the flow guide groove. A flow guide hole connected to the flow guide cavity is provided on the flow guide groove on one side of the connecting pipe. The switch assembly includes a sealing baffle rotatably disposed outside the connecting pipe. A ventilation hole is provided through the sealing baffle. The air duct is opened or closed by rotating the sealing baffle to achieve misalignment or overlap between the ventilation hole and the flow guide hole.

[0007] Preferably, a drive gear plate is coaxially arranged on the sealing baffle, a movable groove is provided through the air guide shroud, one side of the movable groove is connected to the flow channel, and a drive gear plate that meshes with the drive gear plate is slidably arranged in the movable groove.

[0008] Preferably, the drive tooth plate is provided with a sealing plate, and when the ventilation hole corresponds to the drainage hole, the two sealing plates seal the upper and lower ends of the moving groove.

[0009] Preferably, a positioning block is elastically provided on the air guide cover, and one end of the positioning block extends into the moving groove and abuts against the drive tooth plate.

[0010] Preferably, the end face of the positioning block that contacts the drive tooth plate is provided with mutually meshing positioning teeth.

[0011] Preferably, the connecting pipe is provided with an internal thread, and the corresponding end of the air duct cloth is provided with a threaded connecting cylinder that connects to the connecting pipe; an extension pipe is slidably provided in the flow guiding cavity, and in the initial state, the extension pipe extends out of the flow guiding cavity, and a positioning rod for positioning the extension pipe is elastically provided on the air guide cover; one end of the air duct cloth is detachably connected to the extension pipe.

[0012] Preferably, a slider is provided along the axial direction of the extended pipe, a groove is provided inside the air guide shroud for the slider to slide, the positioning rod is provided through the groove, and a positioning rack that meshes with each other is provided on the side wall of the slider and the end face of the positioning rod.

[0013] Preferably, the top of the air guide cover is provided with a hanging part with an adjustable length.

[0014] Preferably, a guide net is provided inside the air duct.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting multiple air guide hoods at intervals on the ventilation duct cloth, this utility model can utilize the air duct at the bottom of the air guide hood to guide the flow of gas, thereby flexibly increasing the ventilation points inside the tunnel according to the needs, effectively improving the construction environment inside the tunnel, and providing favorable conditions for tunnel construction; the setting of the switch component can open or close the connection between the air guide hood and the air duct as needed, enhancing the flexibility of the use of this utility model, with a simple structure and easy operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0017] Figure 2 This is a front sectional view of the air guide shroud according to an embodiment of this application;

[0018] Figure 3 This is a side sectional view of the air guide cover according to an embodiment of this application. Detailed Implementation

[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0020] like Figures 1 to 3 As shown, the ventilation device for tunnel construction according to this utility model includes a fan 1. The fan 1 adopts a tunnel ventilation fan commonly used in tunnel construction in the prior art. The outlet end of the fan 1 is connected to a duct cloth 2. Multiple air guide hoods 3 are arranged at intervals along the length of the duct cloth 2. The air guide hood 3 has a guide cavity 4 formed inside for airflow to pass through. An air duct 5 is provided at the bottom of the air guide hood 3. An exhaust port is opened at the bottom of the air duct 5 to draw out the airflow entering the air guide hood 3, so as to realize the ventilation operation at the corresponding position in the tunnel. Preferably, a guide net 6 is provided in the air duct 5 to realize the uniform flow of airflow. A switch assembly is provided on the air guide hood 3 to connect or disconnect the air duct 5 and the air guide hood 3, thereby meeting different ventilation needs and enhancing the practicality of this utility model.

[0021] Furthermore, a flow channel 7 is provided on one side of the air guide shroud 3, and a cover plate 8 is detachably provided on the air guide shroud 3 at the corresponding end of the flow channel 7. The cover plate 8 has an installation hole in the middle for the air duct cloth 2 to pass through. The cover plate 8 is provided to facilitate the disassembly and maintenance of the structure set in the flow channel 7. The air duct 5 is connected to the flow channel 7, and a connecting pipe 9 connected to the flow cavity 4 is provided in the middle of the flow channel 7. The air duct cloth 2 is connected to the flow cavity 4 through the connecting pipe 9. A flow hole 10 connected to the flow cavity 4 is provided on the flow channel 7 on one side of the connecting pipe 9. The switch assembly includes a sealing baffle 11 rotatably set outside the connecting pipe 9. A ventilation hole 12 is provided through the sealing baffle 11. During operation, the ventilation hole 12 and the flow hole 10 are misaligned or coincident by rotating the sealing baffle 11, thereby realizing the opening or closing of the air duct 5.

[0022] Preferably, a drive gear plate 13 is coaxially arranged on the sealing baffle 11, and the sealing baffle 11 and the drive gear plate 13 are integrated. The sealing baffle 11 has a fan-shaped structure, and a moving groove 14 is provided through the air guide shroud 3. One side of the moving groove 14 is connected to the diversion groove 7, and a drive gear plate 15 that meshes with the drive gear plate 13 is slidably arranged in the moving groove 14. When the sealing baffle 11 needs to be adjusted, the upper and lower drive gear plates 15 will mesh with the drive gear plate 13 to rotate, thereby realizing the overlap or misalignment of the ventilation hole 12 and the diversion hole 10, thereby realizing the opening or closing operation of the air duct 5. Specifically, a sealing plate 16 is provided on the drive gear plate 15. When the ventilation hole 12 corresponds to the diversion hole 10, the two sealing plates 16 seal the upper and lower ends of the moving groove 14 to prevent the airflow from leaving the moving groove 14, and also help to sense whether the sealing baffle 11 is adjusted in place. In addition, a positioning block 17 is elastically provided on the air guide cover 3 by means of a spring. One end of the positioning block 17 extends movably into the moving groove 14 and abuts against the drive tooth plate 15 to position the adjusted drive tooth plate 15 and ensure the stability of the drive tooth plate 15. Preferably, the end face of the positioning block 17 that contacts the drive tooth plate 15 is also provided with mutually meshing positioning teeth to further enhance the stability of the positioning of the drive tooth plate 15 by the positioning block 17.

[0023] Furthermore, the connecting pipe 9 is provided with an internal thread, and the corresponding end of the duct cloth 2 is provided with a threaded connecting cylinder that connects to the connecting pipe 9, so as to facilitate the installation and disassembly of the duct cloth 2 and the air guide shroud 3; in addition, an extension pipe 18 is slidably provided in the guide cavity 4. In the initial state, the extension pipe 18 extends out of the guide cavity 4, and the air guide shroud 3 is provided with a positioning rod 19 for positioning the extension pipe 18 by means of a spring elasticity; one end of the duct cloth 2 is detachably connected to the extension pipe 18. Preferably, the end of the duct cloth 2 connected to the extension pipe 18 is provided with a threaded head 20 for quick installation or disassembly of the duct cloth 2 and the extension pipe 18. The sliding arrangement of the extension pipe 18 in the air guide shroud 3 makes it easy to adjust the distance of the extension pipe 18 into the air guide shroud 3 to achieve tension of the corresponding section of the duct cloth 2, avoiding the situation where the duct cloth 2 is not tensioned after installation due to the error of the fixing point of the air guide shroud 3, which would cause wrinkles and dead points during ventilation and damage to the duct cloth 2.

[0024] Preferably, a slider 21 is provided on the extension pipe 18 along its axial direction, and a groove 22 is provided inside the air guide shroud 3 for the slider 21 to slide. The end face of the slider 21 away from the outer wall of the extension pipe 18 does not contact the inner wall of the groove 22. The positioning rod 19 is provided through the groove 22. The side wall of the slider 21 and the end face of the positioning rod 19 are provided with mutually meshing positioning racks 23 to further enhance the stability of the position of the extension pipe 18 during operation.

[0025] Furthermore, in this embodiment, the top of the air guide shroud 3 is provided with an adjustable-length hanging part for hanging and installing the air guide shroud 3. Preferably, the hanging part includes a sleeve 24, in which a hanging rod 25 is slidably disposed. A locking bolt 26 is provided on the sleeve 24 to fix the adjusted hanging rod 25. A mounting plate 27 is provided at the top of the hanging rod 25. The optimized design of the hanging part facilitates the adjustment of its hanging height, thereby improving the convenience of installation and use of the entire device. In addition, the top of the air guide shroud 3 is preferably provided with a storage groove 28, in which the sleeve 24 is hinged. After use, the hanging part can be laid flat in the storage groove 28 for convenient storage and transportation.

[0026] In use, the fan 1 and the air guide cover 3 are installed at a designated height, and the air duct cloth 2 is connected to the fan 1 and the air guide cover 3. When it is necessary to open the air duct 5 on the air guide cover 3 for ventilation, the positioning block 17 is moved out to position the drive tooth plate 15. The drive tooth plate 15 drives the drive tooth disk 13 to move so that the ventilation hole 12 on the sealing baffle 11 coincides with the drainage hole 10 in the drainage groove 7. The operation is simple and quick, and it is highly practical.

Claims

1. A ventilation device for tunnel construction, comprising a fan, wherein the outlet end of the fan is connected to a ventilation duct cloth, characterized in that: The air duct fabric is provided with multiple air guide hoods at intervals along its length. The air guide hood has a flow guide cavity inside for airflow to pass through. An air duct is provided at the bottom of the air guide hood. An exhaust port is opened at the bottom of the air duct. The air guide hood is provided with a switch assembly that connects or disconnects the air duct from the air guide hood.

2. The ventilation device for tunnel construction according to claim 1, characterized in that: The air guide shroud has a flow channel on one side, and the air duct is connected to the flow channel. A connecting pipe connected to the flow cavity is provided in the middle of the flow channel. A flow hole connected to the flow cavity is provided on the flow channel on one side of the connecting pipe. The switch assembly includes a sealing baffle that is rotatably disposed outside the connecting pipe. A ventilation hole is provided through the sealing baffle. The air duct is opened or closed by rotating the sealing baffle to achieve misalignment or overlap between the ventilation hole and the flow hole.

3. The ventilation device for tunnel construction according to claim 2, characterized in that: A drive gear plate is coaxially arranged on the sealing baffle, and a moving groove is provided through the air guide shroud. One side of the moving groove is connected to the flow channel, and a drive gear plate that meshes with the drive gear plate is slidably arranged in the moving groove.

4. The ventilation device for tunnel construction according to claim 3, characterized in that: The drive tooth plate is provided with a sealing plate. When the ventilation hole corresponds to the drainage hole, the two sealing plates seal the upper and lower ends of the moving groove.

5. The ventilation device for tunnel construction according to claim 3, characterized in that: The air guide cover is elastically provided with a positioning block, one end of which extends into the moving groove and abuts against the drive tooth plate.

6. The ventilation device for tunnel construction according to claim 5, characterized in that: The positioning block has meshing positioning teeth on the end face that contacts the drive tooth plate.

7. The ventilation device for tunnel construction according to claim 2, characterized in that: The connecting pipe is provided with an internal thread, and the corresponding end of the air duct cloth is provided with a threaded connecting cylinder that connects to the connecting pipe; an extension pipe is slidably provided in the flow guiding cavity, and in the initial state, the extension pipe extends out of the flow guiding cavity; a positioning rod for positioning the extension pipe is elastically provided on the air guide cover; one end of the air duct cloth is detachably connected to the extension pipe.

8. The ventilation device for tunnel construction according to claim 7, characterized in that: The extension pipe is provided with a slider along its axial direction, the air guide shroud is provided with a groove for the slider to slide, the positioning rod is provided through the groove, and the slider sidewall and the positioning rod end face are provided with mutually meshing positioning racks.

9. The ventilation device for tunnel construction according to claim 1, characterized in that: The top of the air guide cover is equipped with an adjustable hanging part.

10. The ventilation device for tunnel construction according to claim 1, characterized in that: The air duct is equipped with a flow guide net.

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