Flue gas isolation air curtain diversion system in tunnel

Abstract

The invention relates to the field of tunnel fire prevention and control, and particularly discloses an in-tunnel smoke isolation air curtain diversion system which comprises an air curtain generation device, the air curtain generation device comprises a plurality of air curtain electric control sprayers which are evenly arranged and used for generating air curtains on the two sides of a plurality of smoke control subareas of a tunnel, a groove is transversely formed in the position, corresponding to the tunnel road surface, of the lower portion of the air curtain, a turnover flow guide plate is laid on the groove, when the air curtain is started, the flow guide plate turns over from the state of covering the groove to the state of opening the groove, and a plurality of exhaust holes are formed in the bottom of the groove and connected to an exhaust pipe. The groove with the turnover guide plate and the exhaust hole are formed below the air curtain, so that the flowing direction of the air curtain can be guided and controlled, the problem that a traditional air curtain system cannot control the air flowing direction can be effectively solved, unorganized air is prevented from flowing to a fire source area, extra oxygen is provided for a fire source, and the safety of the fire source is improved. Therefore, the fire hazard and the control difficulty are reduced.

Description

Technical Field

[0001] This application belongs to the technical field of prevention and control of tunnel fires, and specifically relates to a smoke isolation air curtain diversion system in a tunnel. Background Art

[0002] In the modern urban transportation system, road tunnels and highway tunnels play an indispensable role. They not only effectively save urban transportation space, relieve traffic pressure, but also significantly shorten the distance between cities, greatly improving the efficiency and convenience of transportation. In a closed or semi-closed space such as a tunnel, the occurrence of a fire will quickly cause the diffusion of smoke and harmful gases, posing a great threat to the safety of personnel. To address this challenge, air curtain technology has been developed and applied, aiming to isolate smoke by generating a barrier composed of air to prevent it from entering other parts of the tunnel. This technology can theoretically effectively reduce the diffusion of smoke and improve the safety inside the tunnel.

[0003] However, the traditional air curtain system design does not fully consider the control of air flow direction. As a technology that isolates smoke and the fire source through a rapidly flowing air layer, the air curtain essentially relies on the continuous supply of a large amount of air. Since the air curtain itself is composed of air, when the air curtain is activated, some air will inevitably flow into the combustion area, especially between the fire area and the safe area that the air curtain attempts to isolate. This uncontrolled air flow may provide additional oxygen to the fire source, fuel the fire, and instead increase the danger and control difficulty of the fire. In addition, this uncontrolled air flow may lead to a reduction in the efficiency of the air curtain and poor isolation effect of smoke and harmful gases, thus affecting the safe evacuation of personnel inside the tunnel and the progress of rescue operations. Summary of the Invention

[0004] Aiming at the above defects or requirements for improvement in the existing technical solutions, the purpose of the present invention is to overcome the limitations of the traditional tunnel air curtain technology and propose an improved smoke isolation air curtain diversion system in a tunnel. This system can not only effectively isolate smoke, but also precisely control the air flow in the air curtain to prevent it from flowing into the combustion area to assist combustion.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows: A smoke isolation air curtain diversion system in a tunnel includes an air curtain generating device. The air curtain generating device includes a plurality of evenly arranged air curtain electric control nozzles for generating air curtains on both sides of multiple smoke control zones in the tunnel. A groove is horizontally arranged on the lower part of the air curtain corresponding to the tunnel road surface. A flip-up diversion plate is laid on the groove. When the air curtain is activated, the diversion plate flips from the state of covering the groove to the state of opening the groove. A plurality of exhaust holes are arranged at the bottom of the groove, and the plurality of exhaust holes are connected to an exhaust pipe.

[0006] Preferably, turning shafts are provided on both sides of the deflector, and the deflector is driven by a motor to achieve turning.

[0007] Preferably, the turning angle of the deflector is 0° to 135°.

[0008] Preferably, the deflector includes a first deflector and a second deflector arranged symmetrically. The first deflector and the second deflector turn from the state of covering the trench to the state of opening the trench, which means opening the trench from the middle.

[0009] Preferably, at least one extended deflector is built in each of the first deflector and the second deflector, and the extended deflector is connected to the corresponding first deflector and second deflector by a hinged manner.

[0010] Preferably, the air curtain generating device further includes a compressed air source, and the exhaust pipe is communicated with the input port of the compressed air source.

[0011] Preferably, an axial flow fan is arranged in the exhaust pipe.

[0012] Preferably, a stainless steel filter screen is arranged at the opening of the trench, and the deflector fits with the stainless steel filter screen when covering the trench.

[0013] Preferably, a plurality of support ribs are arranged at intervals in the trench. One end of the support rib is fixed on the bottom plate of the trench, and the other end contacts the stainless steel filter screen.

[0014] Preferably, a plug for blocking the exhaust hole is further included, and drain holes are arranged on both sides of the trench.

[0015] The beneficial effects of the present invention are as follows: The present invention can effectively solve the problem that the traditional air curtain system cannot control the air flow direction. By arranging a trench with a turnable deflector and an exhaust hole below the air curtain, the air curtain flow direction can be guided and controlled, avoiding unorganized air flow to the fire source area and providing additional oxygen to the fire source, thereby reducing the fire risk and control difficulty. At the same time, due to the precise control of the air flow direction, the isolation efficiency of the air curtain is improved, and the smoke and harmful gases can be better concentrated in the designated area to ensure the air quality of other safe areas. Through the design of configuring an axial flow fan and an exhaust pipe connected to a compressed air source, the continuous and stable supply of the air curtain is ensured, enhancing the reliability and efficiency of the system during long-term operation. In addition, by arranging drain holes on both sides of the trench and a plug at the exhaust hole, while providing the function of smoke isolation, the present system can also effectively drain the accumulated water at the fire scene, avoiding the influence of water accumulation on rescue operations and tunnel use. Description of the Drawings

[0016] Figure 1Overall schematic diagram of the smoke isolation air curtain diversion system in a tunnel shown in an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the groove of the smoke isolation air curtain diversion system in a tunnel shown in an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the closure of the deflector of the groove shown in an embodiment of the present invention.

[0019] Figure 4 Schematic diagram of the opening of the deflector of the groove shown in an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of the deployment of the extended deflector of the deflector shown in an embodiment of the present invention.

[0021] Explanation of reference numerals: 1 - air curtain generating device, 2 - air curtain, 3 - groove, 4 - deflector, 41 - first deflector, 42 - second deflector, 5 - exhaust hole, 6 - exhaust pipe, 7 - extended deflector, 8 - stainless steel filter screen, 9 - support rib, 10 - drain hole. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the present invention.

[0023] In addition, the described features, structures or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a full understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present application.

[0024] Please refer to Figures 1-3, this embodiment provides a smoke isolation air curtain diversion system in a tunnel. The tunnel includes multiple smoke control zones. The smoke isolation air curtain diversion system in the tunnel includes an air curtain generating device 1. The air curtain generating device 1 includes a plurality of uniformly arranged air curtain electric control nozzles, which are used to generate an air curtain 2 on both sides of multiple smoke control zones in the tunnel. The air curtain 2 is a gas curtain wall formed by high-speed airflows, which can be used to isolate smoke and fire sources. A groove 3 is horizontally arranged on the tunnel road surface corresponding to the lower part of the air curtain 2. The opening of the groove 3 is arranged parallel to the bottom of the air curtain 2, which is convenient for cooperation with the air curtain 2. A flip-up diversion plate 4 is laid on the groove 3. When the air curtain 2 is activated, the diversion plate 4 flips from the closed state covering the groove 3 to the state of opening the groove 3. By flipping the diversion plate 4 and opening the groove 3, the guiding direction of the airflow can be controlled. When the diversion plate 4 is in the closed state covering the groove 3, the diversion plate 4 is flush with the tunnel road surface and does not affect vehicle passage. The diversion plate 4 can be made of strong and durable materials such as steel plates.

[0025] Please refer to Figure 2 , a plurality of exhaust holes 5 are arranged at the bottom of the groove 3, and the plurality of exhaust holes 5 are connected to an exhaust pipe 6. When the air curtain is working, the airflow enters the groove 3 under the guidance of the diversion plate 4, and then is discharged through the exhaust holes 5 and the exhaust pipe 6. In this way, the diversion and control of the air curtain airflow are realized, and the unorganized airflow is prevented from flowing to the fire source area.

[0026] Furthermore, turning shafts are arranged on both sides of the diversion plate 4. The diversion plate 4 is driven by a motor to flip, and the flipping angle of the diversion plate is 0° to 135°. The diversion plate 4 can quickly adjust its position according to the actual situation of the fire in the tunnel, so as to effectively isolate or guide the flow direction of the smoke.

[0027] Please refer to Figure 4 , in some embodiments, the diversion plate 4 includes a first diversion plate 41 and a second diversion plate 42 arranged symmetrically. Turning shafts are hinged on both sides of the first diversion plate 41 and the second diversion plate 42. Driven by a motor, the first diversion plate 41 and the second diversion plate 42 can flip independently, which is convenient for quickly adjusting the direction and distribution of the airflow to cope with different fire situations. The first diversion plate 41 and the second diversion plate 42 flip from the state of covering the groove to the state of opening the groove, which is to open the groove from the middle. By separating from the middle, the formation area of the air curtain can be controlled from both sides, effectively isolating the smoke and the fire source. When the first diversion plate 31 and the second diversion plate 32 are in the closed state covering the groove 3, their surfaces are flush with the road surface and do not affect vehicle passage.

[0028] Please refer to Figure 5, Further, each of the first deflector 41 and the second deflector 42 is internally provided with an extended deflector 7. The extended deflector 7 is connected to the corresponding first deflector 41 and second deflector 42 by a hinged manner. The connection manner between the extended deflector 7 and the first deflector 41 and the second deflector 42 is a folding and storage manner. When the first deflector 41 or the second deflector 42 is flipped to the vertical state, it can be driven by another motor, and the extended deflector 5 extends from the storage state, and the corresponding extended deflector 5 also flips and opens accordingly, thereby further expanding the channel area for guiding the air flow, improving the air flow guiding efficiency of the system, and overcoming the limitation of the size of the deflector itself.

[0029] The air curtain generating device 1 further includes a compressed air source. The exhaust pipe 6 is communicated with the input port of the compressed air source. An axial flow fan is arranged in the exhaust pipe 6. Installing the axial flow fan can enhance the exhaust efficiency. This design can provide continuous air flow supply for the system, form a gas cycle, recycle the gas in the air curtain 2, and realize the recycling of the gas source. By introducing the gas discharged from the exhaust pipe 6 into the compressed air source and spraying it again after compression treatment to form the air curtain 2, a gas circulation loop is thus constituted. This design can effectively reduce the consumption of fresh air, reduce the energy and resource requirements for the system operation, improve the gas source utilization rate, and has the effect of energy conservation and environmental protection.

[0030] Please refer to Figure 3 , In some embodiments, a stainless steel filter screen 8 is arranged at the opening of the groove 3. When the deflector 4 covers the groove 3, it fits with the stainless steel filter screen 8. The stainless steel filter screen 8 can prevent foreign objects carried by the air curtain 2 from entering the inside of the groove 3. When the deflector 4 is in the closed state, its surface fits with the stainless steel filter screen 8, and their settings do not interfere with each other. A plurality of support ribs 9 are arranged at intervals in the groove 3. One end of the support rib 9 is fixed on the bottom plate of the groove 3, and the other end contacts the stainless steel filter screen 8. At the same time, the deflector 4 is attached to the stainless steel filter screen 8. The support rib 9 plays a supporting role. This design enhances the structural stability of the tunnel smoke isolation air curtain diversion system, ensures that the stainless steel filter screen 8 and the deflector 4 maintain their shapes and functions under extreme conditions, and avoids deformation due to the smoke environment or vibration.

[0031] Please refer to Figure 2, and further includes a plug for blocking the exhaust hole 5. Drain holes 10 are provided on both sides of the groove 3. The plug and the drain holes 10 have two functions. The first function is that when a water curtain is equipped in the smoke control zone or water spray extinguishing is adopted, the exhaust hole 5 is closed by the plug to protect the air flow channel. The groove 3 can become a drain trough, and the drain holes 10 drain the water generated during the water curtain or fire fighting process to ensure that there is no water accumulation inside the groove 3. The second function is to repair and clean the inside of the groove. The plug can temporarily block the exhaust hole 5 to prevent sundries from entering the exhaust hole 5 during water washing and cleaning. The drain holes 10 on the side of the groove facilitate draining the water with impurities out of the groove 3 to maintain the dry and clean inside of the groove 3.

[0032] The implementation process of the present invention is as follows: When a fire is detected in the tunnel, the air curtain generating device 1 is automatically started, and a plurality of evenly arranged air curtain electric control nozzles start to generate continuous air curtains 2 on both sides of the smoke control zone of the tunnel to isolate the smoke and the fire source; according to the position of the fire source, the motor of the deflector 4 drives the rotating shaft so that the deflector 4 flips from the state of covering the groove 3 to the state of opening the groove 3. The deflector 4 is composed of a first deflector 41 and a second deflector 42 arranged symmetrically, and they can open the groove 3 from the middle to both sides to guide the direction and distribution of the air flow. If necessary, the flipping angle of the deflector can be adjusted between 0° and 135° to optimally control the air flow. In specific situations, in order to increase the smoke isolation area or more precisely control the air flow direction, the extended deflectors 5 in the first deflector 41 and the second deflector 42 are unfolded by means of hinge. The angle between the extended deflectors 5 and the first deflector 41 and the second deflector 42 can be adjusted between 0° and 135° to assist in controlling the air flow and further enhance the smoke isolation effect of the system. When the deflector 4 is in the state of covering the groove 3, it fits with the stainless steel filter screen 8 at the opening of the groove 3 to prevent large particle sundries from entering. The deflector 4 is flush with the road surface of the tunnel and does not affect the vehicle passage. In addition, the water generated during the fire fighting process (whether it is a water curtain or fire extinguishing water spray) can be discharged through the drain holes 5 on both sides of the groove 3 to prevent water accumulation phenomenon. In addition, the groove 3 can also be cleaned through the drain holes 5.

[0033] In summary, the present invention discloses a smoke isolation air curtain deflector system in a tunnel. The system realizes the precise control and guidance of the air curtain air flow direction by setting a groove 3 with a flip-up deflector 4 and an exhaust pipeline under the air curtain 2, avoiding the problem of unorganized air flow flowing to the fire source area in the traditional air curtain system, and fundamentally reducing the fire risk. In addition, the system connects the exhaust pipe with the compressed air source to form a gas cycle, realizing the recycling of the gas source, not only saving fresh air resources, reflecting the concept of green environmental protection, reducing the system operation cost, having good economy and sustainability, but also considering the drainage requirements and the easy maintainability of the system to ensure efficient operation in case of fire.

[0034] The invention comprehensively considers various factors such as practicability, reliability, economy, and environmental protection. Its structural design is scientific and reasonable, and it is convenient to operate and use, being applicable to various tunnel environments. Through the application of this system, the emergency rescue level during tunnel fires will surely be greatly improved, ensuring the safety of personnel and property, and it has broad application prospects and important practical significance.

[0035] It should be noted that for the specific mechanism by which the motor drives the deflector and its extended part to achieve flipping rotation, as well as the linkage start control of the air curtain during a fire in the present invention, existing mature technical routes are adopted. This patent focuses on the innovative design of the overall structural layout, so it will not be elaborated here. Those skilled in the art can, based on the overall concept disclosed in the present invention, select and implement the best combination with existing conventional technical means.

[0036] The above-mentioned drawings are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, rather than for limiting purposes. It is easy to understand that the processes shown in the above-mentioned drawings do not indicate or limit the chronological order of these processes. Additionally, it is also easy to understand that these processes can be executed, for example, synchronously or asynchronously in multiple modules.

[0037] It should be understood that the present application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A smoke isolation air curtain diversion system in a tunnel, comprising an air curtain generating device (1), the air curtain generating device (1) including a plurality of evenly arranged air curtain electric control nozzles for generating air curtains (2) on both sides of a plurality of smoke control zones in the tunnel, characterized in that, A groove (3) is horizontally arranged on the lower part of the air curtain (2) corresponding to the tunnel road surface. A turnable flow guide plate (4) is laid on the groove (3). When the air curtain (2) is started, the flow guide plate (4) turns from the state of covering the groove (3) to the state of opening the groove (3). A plurality of exhaust holes (5) are arranged at the bottom of the groove (3), and the plurality of exhaust holes (5) are connected to an exhaust pipe (6).

2. The smoke isolation air curtain diversion system in the tunnel according to claim 1, characterized in that: Turning shafts are arranged on both sides of the flow guide plate (4), and the flow guide plate (4) is turned by a motor drive.

3. The smoke isolation air curtain diversion system in the tunnel according to claim 1, characterized in that: The turning angle of the flow guide plate (4) is 0° to 135°.

4. The smoke isolation air curtain diversion system in the tunnel according to claim 2, characterized in that: The flow guide plate (4) includes a first flow guide plate (41) and a second flow guide plate (42) which are symmetrically arranged. The first flow guide plate (41) and the second flow guide plate (42) turn from the state of covering the groove (3) to the state of opening the groove (3) by opening the groove (3) from the middle.

5. The smoke isolation air curtain diversion system in the tunnel according to claim 4, characterized in that: An extension flow guide plate (7) is built in each of the first flow guide plate (41) and the second flow guide plate (42), and the extension flow guide plate (7) is connected to the corresponding first flow guide plate (41) and second flow guide plate (42) by a hinged manner.

6. The smoke isolation air curtain diversion system in the tunnel according to claim 1, wherein: The air curtain generating device (1) further includes a compressed air source, and the exhaust pipe (6) is communicated with the input port of the compressed air source.

7. The smoke isolation air curtain diversion system in the tunnel according to claim 1, characterized in that: An axial flow fan is arranged in the exhaust pipe (6).

8. The smoke isolation air curtain diversion system in the tunnel according to claim 1, characterized in that: A stainless steel filter screen (8) is arranged at the opening of the groove (3), and the flow guide plate (4) is attached to the stainless steel filter screen (8) when covering the groove (3).

9. The smoke isolation air curtain diversion system in the tunnel according to claim 8, characterized in that: A plurality of support ribs (9) are arranged at intervals in the groove (3). One end of the support rib (9) is fixed on the bottom plate of the groove (3), and the other end contacts the stainless steel filter screen (8).

10. The smoke isolation air curtain diversion system in the tunnel according to claim 1, wherein: A plug for blocking the exhaust hole (5) is further included, and drain holes (10) are arranged on both sides of the groove.

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