Tunnel combined air valve with fireproof function

Abstract

The invention relates to the technical field of tunnel air valves, and discloses a tunnel combined air valve with a fireproof function, a first motor assembly is fixedly connected to the top position of an air bellow, ventilation pipelines are arranged on the two sides of the surface of the air bellow and close to the top position, and an air valve body is movably connected to the position, close to the bottom end, in the air bellow in a sleeving mode; the first telescopic assemblies are arranged at the positions, located on the two sides of the interior of the air bellow, of the first motor assembly, the second motor assemblies are arranged at the two sides of the top of the air valve body, and the air direction adjusting assembly, the first air exhaust hole and the second air exhaust hole are arranged, so that when the large-size combined air valve, especially the air valve for a tunnel, is used, the large-size combined air valve is convenient to use; the air direction adjusting assembly ascends and descends in the air valve body, then the air exhausting direction of the first air exhausting hole and the second air exhausting hole is changed, and meanwhile when the air direction is changed through the transverse air exhausting pipe and the main air exhausting pipe at the bottom of the air direction adjusting assembly, the problem of sealing failure caused by blade vibration or frame deformation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air valves for tunnels, and more particularly to a combined tunnel air valve with a fire prevention function. Background Art

[0002] The combined tunnel air valve is a modular air volume regulating device for tunnel ventilation systems. It is usually composed of multiple independently controllable air valve units. By electrically or manually driving to adjust the blade angle, it can accurately control the air flow direction, wind speed and air volume in the tunnel. It has characteristics such as fire prevention, moisture resistance and corrosion resistance, and is widely used in scenarios such as highway tunnels and subway tunnels. Cooperating with an intelligent control system, it can dynamically optimize the ventilation efficiency, ensure air circulation and meet emergency requirements such as fire smoke exhaust. It is one of the key devices for the safe operation of tunnels. Most of the current combined air valves control the air flow direction, wind speed and air volume in the tunnel by adjusting the blade angle. For large-size combined air valves, especially those for tunnels, blade flutter or frame deformation is likely to occur under high-speed air flow, resulting in seal failure. In addition, the position of the traditional air valve is fixed after installation. During later maintenance and repair, it is necessary for workers to climb high and disassemble the fixed bolts one by one, with cumbersome operation steps and a risk of falling from a height. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a combined tunnel air valve with a fire prevention function to solve the technical problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined tunnel air valve with a fire prevention function, comprising a bellows, a first motor assembly is fixedly connected to the top of the bellows, ventilation ducts are provided on both sides of the bellows surface near the top, a wind valve body is movably sleeved inside the bellows and near the bottom, first telescopic assemblies are provided on both sides of the first motor assembly inside the bellows, second motor assemblies are provided on both sides of the top of the wind valve body, the bottom of the second motor assembly is transmission-connected to a second telescopic assembly, the second telescopic assemblies are movably sleeved inside the wind valve body, and the wind valve body is inside and near the bottom. A wind direction adjustment component is movably sleeved near the bottom end, and telescopic screws are fixedly connected to both sides of the top of the air valve body. The telescopic screws are sleeved on the inside of the first telescopic component through surface threads. By providing a wind direction adjustment component, a first exhaust hole and a second exhaust hole, it is beneficial for a large-sized combined air valve, especially a tunnel air valve, to be raised and lowered inside the air valve body through the wind direction adjustment component during use, thereby changing the exhaust wind direction of the first exhaust hole and the second exhaust hole. At the same time, the horizontal exhaust duct at the bottom of the wind direction adjustment component and the main exhaust duct can prevent the problem of sealing failure caused by blade vibration or frame deformation when the wind direction changes.

[0005] In a preferred embodiment, an air volume adjusting disk is movably connected to the top position of the air valve body, an adjusting gear is movably connected to the side position of the air volume adjusting disk inside the air valve body, and a fixed disk is fixedly connected to the bottom position of the air volume adjusting disk inside the air valve body. The air volume adjusting disk and the fixed disk are helpful for controlling the air volume through the rotation of the air volume adjusting disk, thereby avoiding the vibration of traditional blades that affects their normal use.

[0006] In a preferred embodiment, an air inlet cavity is provided inside the air valve body and near the top, a limiting groove is provided on the inner wall of the air volume adjustment disk that is movably sleeved in the air inlet cavity, a transmission groove is provided inside the air valve body at the position of the movably sleeved adjustment gear, and telescopic grooves are provided at the positions on both sides of the air valve body where the second telescopic component is movably sleeved. Through the telescopic grooves, the second telescopic component can rotate inside the air valve body to drive the wind direction adjustment component inside the air valve body to rise and fall, thereby completing the wind direction adjustment operation.

[0007] In a preferred embodiment, an exhaust cavity is provided inside the air valve body at the position where the wind direction adjusting assembly is movably connected. Limiting chutes are provided on both sides of the inner wall of the exhaust cavity. First exhaust holes are provided around the surface of the air valve body near the bottom. Second exhaust holes are provided around the position at the bottom of the air valve body where the first exhaust holes are opened. Through the first exhaust holes and the second exhaust holes, it is beneficial to send air through the first exhaust holes and the second exhaust holes when the wind direction adjusting assembly moves up and down, and complete the wind direction adjustment operation.

[0008] In a preferred embodiment, the first exhaust holes are all inclined outward at an angle of 45 degrees, and the second exhaust holes are all inclined outward at an angle of 20 degrees. By the first exhaust holes being all inclined outward at an angle of 45 degrees and the second exhaust holes being all inclined outward at an angle of 20 degrees, it is beneficial to further increase the wind direction position when the descending amplitude of the wind direction adjusting assembly increases.

[0009] In a preferred embodiment, an electric motor is drivingly connected to the top of the adjusting gear, and the electric motor is fixedly connected to one side of the top of the air valve body. Through the adjusting gear, it is beneficial to drive the air volume adjusting disc to rotate to complete the change of the air volume.

[0010] In a preferred embodiment, regularly arranged circular through holes are provided inside both the air volume adjusting disc and the fixed disc. A meshing gear is fixedly sleeved on the surface of the air volume adjusting disc, and the meshing gear meshes with the adjusting gear. The circular through holes on the surfaces of the air volume adjusting disc and the fixed disc are staggered with each other. By the circular through holes on the surfaces of the air volume adjusting disc and the fixed disc being staggered with each other, it is beneficial to change the air volume by rotating the air volume adjusting disc to change the coincidence degree with the circular through holes on the surface of the fixed disc.

[0011] In a preferred embodiment, limiting sliders are provided on both sides of the surface of the wind direction adjusting assembly. Adjusting screws are fixedly connected to both sides of the top of the wind direction adjusting assembly. The adjusting screws are all threadedly sleeved inside the second telescopic assembly through their surfaces. Regularly arranged transverse exhaust pipes are provided around the bottom of the wind direction adjusting assembly near the edge. Main exhaust pipes are provided around the inside of the transverse exhaust pipes at the bottom of the wind direction adjusting assembly. By the adjusting screws being all threadedly sleeved inside the second telescopic assembly through their surfaces, it is beneficial to drive the adjusting screws to expand and contract by rotating the second telescopic assembly, thereby changing the wind direction adjustment operation.

[0012] In a preferred embodiment, the transverse exhaust air ducts are all inclined outward by 50 degrees, and the main exhaust air ducts are all inclined outward by 15 degrees. By the transverse exhaust air ducts being inclined outward by 50 degrees and the main exhaust air ducts being inclined outward by 15 degrees, when the wind direction adjusting assembly is located inside the air valve body, the wind discharged through the transverse exhaust air ducts is blocked and converged by the inner wall of the air valve body, and the converged air flow is vertically sent into the tunnel interior, enabling the wind direction to be sent in a directional manner.

[0013] Technical effects and advantages of the present invention: 1. By providing a wind direction adjusting assembly, a first exhaust air hole, and a second exhaust air hole, the present invention is conducive to the use of a large-size combined air valve, especially an air valve for a tunnel. When in use, the wind direction adjusting assembly moves up and down inside the air valve body, thereby changing the exhaust air direction change of the first exhaust air hole and the second exhaust air hole. At the same time, when the wind direction changes through the transverse exhaust air ducts and the main exhaust air ducts at the bottom of the wind direction adjusting assembly, the problem of sealing failure caused by blade tremor or frame deformation is avoided. 2. By providing a first motor assembly and a first telescopic assembly, the present invention is conducive to the subsequent maintenance and repair of the air valve. The first motor assembly drives the first telescopic assembly to operate, enabling the air valve body to be quickly separated and disassembled from the air box, reducing the steps of manual disassembly and lowering the labor intensity of the workers. 3. By providing a first motor assembly, a first telescopic assembly, a telescopic screw rod, and an air valve body, the present invention is conducive to the maintenance of the air valve at a high position. The first motor assembly drives the first telescopic assembly to rotate, enabling the telescopic screw rod to push the air valve body to descend, thereby reducing the distance between the air valve body and the ground, avoiding the operation of manual climbing for maintenance, and thus avoiding the risk of falling from a height. Description of the drawings

[0014] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention.

[0015] Figure 2 It is a schematic view of the overall structure of the present invention.

[0016] Figure 3 It is a schematic cross-sectional view of the air box structure of the present invention.

[0017] Figure 4 It is a schematic view of the air valve body structure of the present invention.

[0018] Figure 5 It is a schematic cross-sectional view of the air valve body structure of the present invention.

[0019] Figure 6 It is a schematic view of the air volume adjusting disc structure of the present invention.

[0020] Figure 7It is a schematic diagram of the structure of the wind direction adjustment component of the present invention.

[0021] The accompanying drawings are marked as follows: 1. bellows; 2. first motor assembly; 3. ventilation duct; 4. first telescopic assembly; 5. air valve body; 501. air inlet chamber; 502. limiting groove; 503. transmission groove; 504. telescopic groove; 505. exhaust chamber; 506. limiting slide groove; 507. first exhaust hole; 508. second exhaust hole; 6. second motor assembly; 7. second telescopic assembly; 8. wind direction adjustment assembly; 801. limiting slide block; 802. adjusting screw; 803. horizontal exhaust duct; 804. main exhaust duct; 9. telescopic screw; 10. air volume adjustment disk; 1001. circular through hole; 1002. meshing gear; 11. fixed disk; 12. adjusting gear; 1201. electric motor. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The tunnel combined air valve with a fire protection function involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0023] Reference Figures 1-7 As shown, the present invention provides a combined tunnel air valve with a fire prevention function, including a bellows 1, a first motor assembly 2 is fixedly connected to the top position of the bellows 1, ventilation ducts 3 are provided on both sides of the surface of the bellows 1 and near the top position, a wind valve body 5 is movably sleeved inside the bellows 1 and near the bottom end, the first motor assembly 2 is provided with a first telescopic assembly 4 on both sides of the inside of the bellows 1, a second motor assembly 6 is provided on both sides of the top of the wind valve body 5, the second motor assembly 6 is transmission-connected with a second telescopic assembly 7 at the bottom position, the second telescopic assembly 7 is movably sleeved inside the wind valve body 5, a wind direction adjustment assembly 8 is movably sleeved inside the wind valve body 5 and near the bottom end, telescopic screws 9 are fixedly connected to both sides of the top of the wind valve body 5, and the telescopic screws 9 are sleeved inside the first telescopic assembly 4 through surface threads; In the present embodiment: by providing a wind direction regulating component 8, a first exhaust hole 507, and a second exhaust hole 508, it is beneficial for a large-sized combined air valve, especially a tunnel air valve, to be raised and lowered inside the air valve body 5 through the wind direction regulating component 8 during use, thereby changing the exhaust wind direction of the first exhaust hole 507 and the second exhaust hole 508. At the same time, through the transverse exhaust duct 803 at the bottom of the wind direction regulating component 8 and the main exhaust duct 804, when the wind direction changes, the problem of sealing failure caused by blade vibration or frame deformation can be avoided.

[0024] The top of the air valve body 5 is movably sleeved with an air volume adjustment disk 10, a side of the air volume adjustment disk 10 is movably sleeved with an adjustment gear 12, and the bottom of the air volume adjustment disk 10 is fixedly sleeved with a fixed disk 11. In this embodiment, the air volume regulating disk 10 and the fixed disk 11 are used to control the air volume through the rotation of the air volume regulating disk 10, thereby avoiding vibration of traditional blades that affects their normal use.

[0025] An air inlet cavity 501 is provided inside the air valve body 5 and near the top, a limit groove 502 is provided on the inner wall of the air inlet cavity 501 at a position where the air volume adjustment disk 10 is movably sleeved, a transmission groove 503 is provided inside the air valve body 5 at a position where the adjustment gear 12 is movably sleeved, and telescopic grooves 504 are provided on both sides of the air valve body 5 at positions where the second telescopic assembly 7 is movably sleeved; In this embodiment, the telescopic groove 504 is conducive to the rotation of the second telescopic component 7 inside the air valve body 5 to drive the wind direction adjustment component 8 inside the air valve body 5 to rise and fall, thereby completing the wind direction adjustment operation.

[0026] An exhaust cavity 505 is provided inside the air valve body 5 at a position where the air direction adjustment component 8 is movably connected, and limited sliding grooves 506 are provided at both sides of the inner wall of the exhaust cavity 505. First exhaust holes 507 are provided on the surface of the air valve body 5 and near the bottom, and second exhaust holes 508 are provided at the bottom of the air valve body 5 and around the first exhaust hole 507. In this embodiment, the first air exhaust hole 507 and the second air exhaust hole 508 facilitate the wind to be sent in through the first air exhaust hole 507 and the second air exhaust hole 508 when the wind direction adjustment component 8 is raised or lowered, and the wind direction adjustment operation is completed.

[0027] The first air outlet holes 507 are all inclined outward at 45 degrees, and the second air outlet holes 508 are all inclined outward at 20 degrees; In this embodiment: the first air exhaust holes 507 are inclined outwardly at forty-five degrees, and the second air exhaust holes 508 are inclined outwardly at twenty degrees, which is beneficial for further increasing the wind direction position when the wind direction adjustment component 8 increases in the degree of descent.

[0028] The top position of the adjusting gear 12 is connected to an electric motor 1201, and the electric motor 1201 is fixedly connected to one side of the top of the air valve body 5; In this embodiment, the air volume can be changed by adjusting the gear 12 to drive the air volume adjustment disk 10 to rotate.

[0029] Among them, both the air volume adjustment disc 10 and the fixed disc 11 are internally provided with regularly arranged circular through holes 1001. A meshing gear 1002 is fixedly sleeved on the surface of the air volume adjustment disc 10. The meshing gear 1002 meshes with the adjustment gear 12. The circular through holes 1001 on the surfaces of the air volume adjustment disc 10 and the fixed disc 11 are staggered with each other. In this embodiment: By staggering the circular through holes 1001 on the surfaces of the air volume adjustment disc 10 and the fixed disc 11, it is beneficial to change the air volume by rotating the air volume adjustment disc 10 to change the coincidence degree with the circular through holes 1001 on the surface of the fixed disc 11.

[0030] Among them, limiting sliders 801 are provided on both sides of the surface of the wind direction adjustment component 8. Adjusting screws 802 are fixedly connected to both sides of the top of the wind direction adjustment component 8. The adjusting screws 802 are threadedly sleeved on the inner part of the second telescopic component 7 through their surfaces. Regularly arranged transverse exhaust pipes 803 are provided around the bottom of the wind direction adjustment component 8 near the edge. Regularly arranged main exhaust pipes 804 are provided around the inner side of the bottom of the wind direction adjustment component 8 at the transverse exhaust pipes 803. In this embodiment: By threadedly sleeving the adjusting screws 802 on the inner part of the second telescopic component 7 through their surfaces, it is beneficial to drive the adjusting screws 802 to expand and contract by rotating the second telescopic component 7, thereby changing the adjustment operation of the wind direction.

[0031] Among them, the transverse exhaust pipes 803 are all inclined outward by 50 degrees, and the main exhaust pipes 804 are all inclined outward by 15 degrees. In this embodiment: By inclining the transverse exhaust pipes 803 outward by 50 degrees and the main exhaust pipes 804 outward by 15 degrees, when the wind direction adjustment component 8 is located inside the air valve body 5, the wind discharged through the transverse exhaust pipes 803 is blocked and converged by the inner wall of the air valve body 5, and the converged air flow is vertically sent into the tunnel, so that the wind direction can be sent in a specific direction.

[0032] The working principle of the present invention: First, when ventilating inside the tunnel, external air enters the inner part of the air box 1 through the ventilation pipe 3, then enters the position of the air volume adjustment disc 10 at the top of the air valve body 5 through the air box 1, then enters the circular through holes 1001 opened in the fixed disc 11 through the circular through holes 1001 on the surface of the air volume adjustment disc 10, then enters the air inlet cavity 501 and the exhaust cavity 505, and then the air is discharged into the tunnel through the main exhaust pipes 804 and the transverse exhaust pipes 803 at the bottom of the wind direction adjustment component 8 movably sleeved inside the exhaust cavity 505. Then, when it is necessary to adjust the wind force, the electric motor 1201 is started at this time, so that the electric motor 1201 drives the adjusting gear 12 to rotate. Then, the adjusting gear 12 drives the meshing gear 1002 on one side that meshes with each other, and further enables the meshing gear 1002 to drive the entire air volume adjusting disc 10 to rotate. Then, the rotation of the air volume adjusting disc 10 causes the circular through holes 1001 on the surface of the air volume adjusting disc 10 to gradually coincide with the circular through holes 1001 on the surface of the fixed disc 11, thereby increasing the amount of air entering the position of the air inlet cavity 501 inside the air box 1. Then, when the entering air is discharged through the main exhaust pipe 804 and the transverse exhaust pipe 803 respectively, at this time, since the transverse exhaust pipe 803 is inclined outward by 50 degrees, the air discharged through the transverse exhaust pipe 803 collides with the inner wall of the exhaust cavity 505, and then the air rebounded from the inner wall of the exhaust cavity 505 converges towards the middle position below the main body 5 of the air valve. Then, driven by the air discharged through the main exhaust pipe 804, the air is exhausted towards the vertical part of the main body 5 of the air valve; Then, when it is necessary to adjust the direction of the discharged air, the second motor assembly 6 at the top of the wind direction adjusting assembly 8 is started at this time, so that the second motor assembly 6 drives the second telescopic assembly 7 to rotate. Then, the second telescopic assembly 7 rotates to drive the adjusting screw 802 inside it. Then, restricted by the wind direction adjusting assembly 8 and the limit slider 801, the adjusting screw 802 causes the wind direction adjusting assembly 8 to vertically descend inside the exhaust cavity 505. Then, when the wind direction adjusting assembly 8 reaches the bottom position of the first exhaust hole 507 opened on the main body 5 of the air valve, at this time, the air inside the exhaust cavity 505 is discharged towards the positions of the transverse exhaust pipe 803, the main exhaust pipe 804, and the first exhaust hole 507 respectively. Then, since the first exhaust hole 507 is inclined outward by 45 degrees, the range of the discharged air increases at this time. Then, when the wind direction adjusting assembly 8 continues to descend to the bottom position of the second exhaust hole 508, so that at this time, the transverse exhaust pipe 803 and the main exhaust pipe 804 are separated from the inside of the exhaust cavity 505. At this time, the air is discharged through the transverse exhaust pipe 803, the main exhaust pipe 804, the first exhaust hole 507, and the second exhaust hole 508. At this time, since the transverse exhaust pipe 803 is separated from the exhaust cavity 505, the air discharged through it diffuses in all directions. Then, because the second exhaust hole 508 is inclined by 20 degrees, the air is discharged horizontally, thereby increasing the air discharge range; Then, when the entire main body 5 of the air valve needs to be overhauled, the first motor assembly 2 at the top of the air box 1 is started at this time, so that the first motor assembly 2 drives the first telescopic assembly 4 to rotate. Then, the rotation of the first telescopic assembly 4 drives the telescopic screw 9. Then, the telescopic screw 9 restricts the telescopic screw 9 on the other side at the top of the main body 5 of the air valve, so that the main body 5 of the air valve vertically descends. Then, when the main body 5 of the air valve is close to the ground, manual daily maintenance and overhaul of the main body 5 of the air valve can be carried out. The operation is simple and convenient, and it avoids the occurrence of potential safety hazards caused by manual climbing.

[0033] Finally, the above are only preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A combined tunnel air valve with a fire prevention function, comprising an air box (1), characterized in that: A first motor assembly (2) is fixedly connected to the top position of the bellows (1). Ventilation ducts (3) are provided on both sides of the surface of the bellows (1) near the top position. A valve main body (5) is movably sleeved inside the bellows (1) near the bottom position. First telescopic assemblies (4) are provided on both sides inside the bellows (1) where the first motor assembly (2) is located. Second motor assemblies (6) are provided on both sides of the top of the valve main body (5). Second telescopic assemblies (7) are drivingly connected to the bottom positions of the second motor assemblies (6). The second telescopic assemblies (7) are movably sleeved inside the valve main body (5). A wind direction adjustment assembly (8) is movably sleeved inside the valve main body (5) near the bottom position. Telescopic screws (9) are fixedly connected to both sides of the top of the valve main body (5). The telescopic screws (9) are threadedly sleeved on the surface inside the first telescopic assemblies (4).

2. The combined tunnel air valve with fire prevention function according to claim 1, characterized in that: An air volume adjustment disc (10) is movably sleeved at the top end inside the valve main body (5). An adjustment gear (12) is movably sleeved on one side of the air volume adjustment disc (10) inside the valve main body (5). A fixed disc (11) is fixedly sleeved at the bottom position of the air volume adjustment disc (10) inside the valve main body (5).

3. The combined tunnel air valve with fire prevention function according to claim 1, characterized in that: An air inlet cavity (501) is provided inside the valve main body (5) near the top position. A limiting groove (502) is provided on the inner wall of the air inlet cavity (501) where the air volume adjustment disc (10) is movably sleeved. A transmission groove (503) is provided inside the valve main body (5) where the adjustment gear (12) is movably sleeved. Telescopic grooves (504) are provided on both sides inside the valve main body (5) where the second telescopic assemblies (7) are movably sleeved.

4. The tunnel combined air valve with fire prevention function according to claim 1, characterized in that: An air exhaust cavity (505) is provided inside the valve main body (5) where the wind direction adjustment assembly (8) is movably connected. Limiting sliding grooves (506) are provided on both sides of the inner wall of the air exhaust cavity (505). First air exhaust holes (507) are provided around the surface of the valve main body (5) near the bottom position. Second air exhaust holes (508) are provided around the bottom position of the valve main body (5) where the first air exhaust holes (507) are provided.

5. The combined tunnel air valve with fire prevention function according to claim 4, characterized in that: The first air exhaust holes (507) are inclined 45 degrees outward. The second air exhaust holes (508) are inclined 20 degrees outward.

6. The combined tunnel air valve with fire prevention function according to claim 3, characterized in that: An electric motor (1201) is drivingly connected to the top position of the adjustment gear (12). The electric motor (1201) is fixedly connected to one side of the top of the valve main body (5).

7. The combined tunnel air valve with fire prevention function according to claim 2, wherein: Regularly arranged circular through holes (1001) are provided inside both the air volume adjustment disc (10) and the fixed disc (11). A meshing gear (1002) is fixedly sleeved on the surface of the air volume adjustment disc (10). The meshing gear (1002) meshes with the adjustment gear (12). The circular through holes (1001) on the surfaces of the air volume adjustment disc (10) and the fixed disc (11) are staggered with each other.

8. The combined tunnel air valve with fire prevention function according to claim 1, characterized in that: On both sides of the surface of the wind direction adjustment component (8), limit sliders (801) are provided. On both sides of the top of the wind direction adjustment component (8), adjustment screws (802) are fixedly connected. The adjustment screws (802) are threadedly sleeved on the inner part of the second telescopic component (7) through the surface. On the periphery of the bottom of the wind direction adjustment component (8) near the edge, regularly arranged transverse exhaust ducts (803) are provided. Inside the transverse exhaust ducts (803) on the periphery of the bottom of the wind direction adjustment component (8), regularly arranged main exhaust ducts (804) are provided.

9. The tunnel combined air valve with fire prevention function according to claim 8, characterized in that: The transverse exhaust ducts (803) are inclined 50 degrees outward, and the main exhaust ducts (804) are inclined 15 degrees outward.

Images