An inflatable sealing structure for the full cross-section of a tunnel under extreme fire

Abstract

The present invention discloses an inflatable plugging structure for the entire section of a tunnel under extreme fire conditions, comprising an inflatable main structure arranged along the boundary of the tunnel structure in the tunnel section after inflation, a flexible plugging roller shutter connected to the bottom of the inflatable main structure, a water storage air cushion connected to the bottom of the flexible plugging roller shutter, a water pipe connected to the inflatable main structure, and a nozzle connected to the water pipe for spraying water to cool the inflatable main structure and the flexible plugging roller shutter. The inflatable plugging structure of the present invention is used to be arranged in a tunnel. When a fire occurs, if conventional fire-fighting facilities or equipment cannot effectively suppress the fire source, the fire source can be isolated from the outside world, that is, the inflatable plugging structures arranged on both sides of the fire source are used to suffocate the fire in the tunnel. In the case of a large amount of full-section plugging engineering for the tunnel, the adoption of this scheme has significant advantages such as fast implementation speed, good plugging effect, and less manpower required, and can be used as a standing fire-fighting facility for some major tunnel projects.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and specifically, to an inflatable plugging structure for the full cross-section of a tunnel under extreme fire conditions. Background Art

[0002] There are a large number of long traffic tunnels in our country, and many of them are far from cities. In case of a fire, it may not be possible to handle it in time, resulting in heavy casualties and serious damage to the tunnel structure, with serious consequences.

[0003] In some highway or railway tunnels, fire extinguishers and automatic fire extinguishing systems are equipped, but there are also some long tunnels built for a long time without an automatic fire extinguishing system. Even if there are automatic fire extinguishing facilities, there are still dead corners that cannot be covered by the fire extinguishing system, and it can only play a role in controlling the fire under high fire load conditions and cannot effectively extinguish the fire.

[0004] Currently, there are already cases of using sandbags to block tunnels, but for large cross-section tunnels (such as: 7m high and 10m wide), it is time-consuming and laborious, with low plugging efficiency, and it is extremely difficult for personnel to continuously operate under high-temperature and thick-smoke conditions. Summary of the Invention

[0005] The purpose of the present invention is to provide an inflatable plugging structure for the full cross-section of a tunnel under extreme fire conditions, mainly solving the problems of low plugging efficiency, time-consuming and laborious when blocking large cross-section tunnels in case of a fire.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] An inflatable plugging structure for the full cross-section of a tunnel under extreme fire conditions includes an inflatable main structure arranged along the tunnel structure boundary in the tunnel cross-section after inflation, a flexible plugging rolling curtain connected to the lower part of the inflatable main structure, a water storage air cushion symmetrically arranged at the bottom of the flexible plugging rolling curtain and internally connected, a water pipe connected to the inflatable main structure and extending from both left and right ends to the bottom of both sides of the tunnel, and a nozzle connected to the water pipe for spraying water to cool down the inflatable main structure and the flexible plugging rolling curtain.

[0008] Further, in the present invention, the flexible plugging rolling curtain is adapted to the shape of the tunnel cross-section.

[0009] Further, in the present invention, when the inflatable main structure is not inflated, the flexible plugging rolling curtain is rolled up and stored from bottom to top and tied to the inflatable main structure.

[0010] Further, in the present invention, a temperature sensor is provided at the top of the inflatable main structure.

[0011] Furthermore, in the present invention, a high-temperature resistant heat insulation layer is provided on the top of the inflatable main body structure.

[0012] Furthermore, in the present invention, the bottom surface height of the water storage air cushion on the fire-affected side is higher than that of the water storage air cushion on the non-fire-affected side.

[0013] Furthermore, in the present invention, a water overflow hole is provided at the same height as the bottom surface of the water storage air cushion on the fire-affected side of the flexible sealing rolling curtain.

[0014] Furthermore, in the present invention, the inflatable main body structure, the water storage air cushion and the flexible sealing rolling curtain are all made of airtight high-temperature resistant flexible materials.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The inflatable sealing structure of the present invention is used to be arranged in a tunnel. In the case where conventional fire extinguishing facilities or equipment cannot effectively suppress the fire source during a fire, it can isolate the fire source from the outside world, that is, use the inflatable sealing structures arranged on both sides of the fire source to achieve asphyxiating fire extinguishing in the tunnel. For the situation where the full-section sealing project of the tunnel is large, adopting this solution has significant advantages such as fast implementation speed, good sealing effect, and less manpower required, and can be used as a standing fire extinguishing facility for some major tunnel projects.

[0017] (2) When the inflatable sealing structure of the present invention is not in use, the system has a small volume, which is convenient for storage, movement and carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 It is an application schematic diagram of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the present invention in the tunnel cross-section.

[0021] Among them, the names corresponding to the reference numerals are:

[0022] 1 - inflatable main body structure, 2 - flexible sealing rolling curtain, 3 - water storage air cushion, 4 - water pipe, 5 - sprinkler head, 6 - high-temperature resistant heat insulation layer, 7 - water overflow hole, 8 - tunnel structure boundary. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments. The implementation manners of the present invention include but are not limited to the following embodiments.

[0024] Embodiment

[0025] As Figures 1 to 3As shown in the figure, an inflatable sealing structure for the full cross-section of a tunnel under extreme fire conditions disclosed by the present invention is used in tunnel fire extinguishing and is equipped with an air pump and a water pump. The inflatable sealing structure includes an inflatable main structure 1 arranged along the tunnel structure boundary 8 in the tunnel cross-section, a flexible sealing rolling curtain 2 connected to the inflatable main structure 1, a water storage air cushion 3 connected to the bottom of the flexible sealing rolling curtain 2 and symmetrically arranged relative to the flexible sealing rolling curtain 2 with internal communication, a water pipe 4 connected to the inflatable main structure 1 and extending from both left and right ends to the bottom of both sides of the tunnel, and a nozzle 5 connected to the water pipe 4 for spraying water to cool the inflatable main structure 1 and the flexible sealing rolling curtain 2. When a fire occurs and the fire source cannot be effectively suppressed by the fire fighting water source, after the firefighters arrive at the scene, the inflatable sealing structure is arranged at appropriate positions on both sides of the fire source. The inflatable main structure 1 is inflated through the air pump to make it expand rapidly. After the inflatable main structure 1 is inflated, it forms a tight contact with the inner boundary of the tunnel to achieve suffocating fire extinguishing of the fire source. In the case of a large amount of work for full cross-section sealing of the tunnel, this solution has significant advantages such as fast implementation speed, good sealing effect, and less manpower required, and can be used as a standing fire extinguishing facility for some major tunnel projects.

[0026] In this embodiment, when the inflatable main structure 1 is not inflated, the flexible sealing rolling curtain 2 is rolled up and stored and connected to the inflatable main structure 1 through simple bundling. When arranging the inflatable structure, the flexible sealing rolling curtain is loosened. When the inflatable main structure is inflated and expanded, the flexible sealing rolling curtain naturally hangs down to complete the sealing. Subsequently, when inflating and storing water in the water storage air cushion, the firefighters introduce the water on the fire truck into the water storage air cushion through a water hose. On the one hand, water can be sprayed onto the fire side of the inflatable main structure and the flexible sealing rolling curtain by using the nozzle after connecting an external water pump to the bottom of the water pipe to cool them. And the sprayed cooling water can also flow back to the water storage air cushion on the back fire side through the overflow holes 7 arranged at the same height as the bottom surface of the water storage air cushion 3 on the side of the flexible sealing rolling curtain 2 facing the fire, realizing the recycling of the cooling water. On the other hand, after the water storage air cushion is filled with water, it will also increase the pressure on the tunnel floor to play a certain sealing effect, and can also increase the weight under the flexible sealing rolling curtain to prevent the air in the sealed space from burning to form a negative pressure and increasing the gap between the flexible sealing rolling curtain and the inflatable main structure, thereby weakening the sealing effect.

[0027] In this embodiment, a high-temperature resistant heat insulation layer 6, such as inorganic fiber felt, is provided on the top of the inflatable main structure 1. When the inflatable main structure is inflated and expanded, the top of the inflatable main structure is in close contact with the inner wall of the tunnel, and the high-temperature resistant heat insulation layer 6 can prevent the high-temperature tunnel inner wall from damaging the inflatable structure.

[0028] In this embodiment, the inflatable main structure 1, the water storage air cushion 3, and the flexible sealing rolling curtain 2 are all made of airtight high-temperature resistant flexible materials.

[0029] Through the above design, the inflatable sealing structure of the present invention is used to be arranged in a tunnel. When a fire occurs and the fire source cannot be effectively suppressed by the fire-fighting water source, it can isolate the fire source from the outside world, that is, use the inflatable sealing structures arranged on both sides of the fire source to achieve asphyxiating fire extinguishing in the tunnel. In the case where the engineering quantity of full-section sealing of the tunnel is large, adopting this solution has significant advantages such as fast implementation speed, good sealing effect, and less manpower required, and can be used as a standing fire extinguishing facility for some major tunnel projects.

[0030] The above embodiments are only one of the preferred embodiments of the present invention and should not be used to limit the protection scope of the present invention. Any meaningless changes or touch-ups made on the main design concept and spirit of the present invention, as long as the technical problems solved are still consistent with the present invention, should be included in the protection scope of the present invention.

Claims

1. An inflatable sealing structure for the full cross-section of a tunnel under extreme fire conditions, characterized in that It includes an inflatable main structure (1) arranged along the tunnel structure boundary in the tunnel cross-section after inflation, a flexible sealing rolling curtain (2) connected to the lower part of the inflatable main structure (1), a water storage air cushion (3) connected to the bottom of the flexible sealing rolling curtain (2) and symmetrically arranged relative to the flexible sealing rolling curtain (2) with internal communication, a water pipe (4) connected to the inflatable main structure (1) and extending from both left and right ends to the bottom of both sides of the tunnel, and a nozzle (5) connected to the water pipe (4) for spraying water to cool the inflatable main structure (1) and the flexible sealing rolling curtain (2); The flexible sealing rolling curtain (2) is adapted to the shape of the tunnel cross-section; When the inflatable main structure (1) is not inflated, the flexible sealing rolling curtain (2) is rolled up and stored from bottom to top and strapped to the inflatable main structure (1); The bottom surface height of the water storage air cushion (3) on the fire-exposed side is higher than the bottom surface height of the water storage air cushion (3) on the non-fire-exposed side; A water overflow hole (7) is provided at the same height as the bottom surface of the water storage air cushion (3) on the fire-exposed side of the flexible sealing rolling curtain (2); When the inflatable main structure is inflated and expanded, the flexible sealing rolling curtain naturally droops to complete the sealing. Firefighters introduce the water from the fire truck into the water storage air cushion through a fire hose. After connecting an external water pump to the bottom of the water pipe, the nozzle sprays water onto the fire-exposed side of the inflatable main structure and the flexible sealing rolling curtain to cool them; the sprayed cooling water flows back to the water storage air cushion on the non-fire-exposed side through the water overflow hole provided at the same height as the bottom surface of the flexible sealing rolling curtain and the water storage air cushion on the fire-exposed side, realizing the recycling of the cooling water; when the water storage air cushion is full of water, it also increases the pressure on the tunnel floor and plays a certain sealing effect.

2. The inflatable plugging structure for the full cross-section of a tunnel under extreme fire according to claim 1, wherein, A temperature sensor is provided at the top of the inflatable main structure (1).

3. The inflatable plugging structure for the full cross-section of a tunnel under extreme fire according to claim 2, characterized in that, A high-temperature resistant heat insulation layer (6) is provided at the top of the inflatable main structure (1).

4. The inflatable plugging structure for the full cross-section of a tunnel under extreme fire according to claim 3, characterized in that, The inflatable main structure (1), the water storage air cushion (3) and the flexible sealing rolling curtain (2) are all made of airtight high-temperature resistant flexible materials.

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