Fire extinguishing device and fire extinguishing method suitable for tunnel

Abstract

The invention relates to a fire extinguishing device suitable for a tunnel and a fire extinguishing method. The fire extinguishing device comprises a plurality of mounting seats and plugging devices mounted on the mounting seats; the mounting seat is mounted on a side wall of a tunnel; the plugging device comprises fireproof film cloth which has a folded state and an unfolded state; when the fireproof film cloth is in a storage state, the fireproof film cloth is stored in the mounting seat; when the fireproof film cloth is in an unfolded state, the fireproof film cloth forms a blocking wall; the trigger mechanism is mounted on the mounting seat or the side wall of the tunnel; the triggering mechanism is used for supporting the fireproof film cloth, so that the fireproof film cloth is in a storage state; and after the triggering mechanism is triggered, the fireproof film cloth enters an unfolded state. The blocking devices on the two sides of the fire source form the blocking walls, the two blocking walls isolate the fire source in a closed space, when the oxygen concentration in the space is reduced to a threshold value, the fire source is automatically extinguished, the effect of rapidly extinguishing the fire can be achieved, the safety of personnel is guaranteed, and meanwhile the tunnel structure can be prevented from being greatly damaged.

Description

Technical Field

[0001] This invention relates to the field of tunnel technology, and in particular to a fire extinguishing device and method suitable for use in tunnels. Background Technology

[0002] The unique characteristics of long tunnels pose significant risks when they catch fire. In reality, there have been tragic incidents where fires in long tunnels prevented firefighters from reaching the scene in time. The narrow, enclosed structure of long tunnels (>3km) leads to heat accumulation during a fire; in truck fires, the temperature of the ignition source exceeds 1000℃, and within 30 minutes, the temperature of the secondary lining of the tunnel arch reaches 363℃ (the critical value for concrete bursting is 250℃), causing concrete spalling to a depth of 1-3cm. Incomplete combustion produces high concentrations of CO (lethal concentration 0.1%, reaching 1% in a fire) and HCN. Smoke spreads five times faster than the fire, reaching peak concentration within 15 minutes, resulting in visibility of less than 1 meter and a dramatically increased risk of asphyxiation.

[0003] Based on the characteristics of fires in long tunnels, the sealing and suffocation method can be used: sealing the entrances and exits and injecting inert gas to extinguish the fire (as is commonly used in railway tunnels). However, highway tunnels have many cross passages, and it is difficult to ensure airtightness, making this method less effective.

[0004] Therefore, it is necessary to propose a fire extinguishing device and method suitable for use in tunnels to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0005] The main objective of this invention is to provide a fire extinguishing device and method suitable for use in tunnels, in order to solve the problems in the prior art.

[0006] To achieve the above objectives, the first aspect of the present invention provides a fire extinguishing device suitable for use in tunnels, comprising a plurality of mounting seats spaced apart along the extension direction of the tunnel and a sealing device installed on the mounting seats; The mounting base is installed on the sidewall of the tunnel; The sealing device includes: The fireproof membrane fabric has a stowed state and an unfolded state; when the fireproof membrane fabric is in the stowed state, it is stowed in the mounting base; when the fireproof membrane fabric is in the unfolded state, it forms a sealing wall. A triggering mechanism is installed on the mounting base or the side wall of the tunnel; the triggering mechanism is used to support the fireproof membrane, so that the fireproof membrane is in a retracted state; and when the triggering mechanism is triggered, the fireproof membrane is put into an unfolded state.

[0007] Preferably, the sealing device further includes a water-swellable structure and a water spraying mechanism; The water-swellable structure is installed on the mounting base; when the water-swellable structure comes into contact with water, it expands and fills the fireproof membrane. The water spraying mechanism is mounted on the mounting base; the water spraying direction of the water spraying mechanism is towards the water-swellable structure.

[0008] Preferably, the bottom of the fireproof membrane is connected to at least one base plate, which is used to house the fireproof membrane in the mounting base; The side of the base plate is bent to form a track section, which is connected to the triggering mechanism.

[0009] Preferably, the triggering mechanism includes a drive component and a support component; The output end of the drive component is connected to the support member and is used to drive the support member to move; The support member is used to support the track section, and when the drive assembly drives the support member to move to the target position, the support member disengages from the track section.

[0010] Preferably, the mounting base is equipped with a plurality of the sealing devices; the plurality of sealing devices are arranged sequentially along the length direction of the mounting base; the plurality of fireproof membranes together form a sealing wall after being unfolded, and adjacent fireproof membranes are squeezed against each other.

[0011] A second aspect of the present invention provides a fire extinguishing method suitable for tunnels, which extinguishes a fire source in a tunnel by using a fire extinguishing device suitable for tunnels, including the following steps: S1, responds to tunnel fire alarm signal and determines the location of the fire source; S2, Based on the location of the fire source, determine the two blocking devices that need to be triggered; S3, Evacuate the crowd between the two blocking devices in step S2; S4, once it is determined that all the people between the two blocking devices have been evacuated, the corresponding two blocking devices are triggered to form a sealed space between the two blocking devices, and the fire source is located in the sealed space.

[0012] Preferably, triggering the two corresponding blocking devices in step S4 includes the following steps: When the corresponding triggering mechanism is activated, the bottom of the fireproof membrane fabric falls and unfolds under its own weight and the weight of the base plate. The corresponding water spray mechanism is activated, spraying water onto the water-swellable structure. The water-swellable structure fills the fireproof membrane and accelerates its unfolding.

[0013] Preferably, after step S4, the following steps are further included: S41, determine two blocking devices adjacent to the two already triggered blocking devices as safety redundancy blocking devices; S42, continue to evacuate the crowd between the two safety redundancy blocking devices in step S41; S43, after it is determined that all the people between the two safety redundancy blocking devices in step S42 have been evacuated, the two safety redundancy blocking devices are triggered; at this time, two more sealed spaces are established on both sides of the sealed space where the fire source is located as safety redundancy.

[0014] Preferably, the design steps for the spacing between two adjacent mounting bases are as follows: Using formula Calculate the spacing between two adjacent mounting bases in the standard area, where, This represents the distance (m) between two adjacent mounting bases in the standard area, where min indicates the minimum value. denoted as maximum ignition power (MW), and v as longitudinal wind speed (m / s). The critical temperature for the secondary lining of the tunnel is 250℃. The distance (m) from which the lethal concentration of flue gas diffuses. The formula for calculating the distance between two adjacent mounting bases in the hazardous area is as follows: ;in, The distance (m) between two adjacent mounting bases in a standard area. The distance between two adjacent mounting bases in the hazardous area; wherein the hazardous area includes the cross passageway area and the power distribution room area.

[0015] Preferably, the mounting base has a built-in temperature sensor and a smoke detector; The system acquires the real-time temperature detected by the temperature sensor and the real-time carbon monoxide content detected by the smoke detector. When the real-time temperature is greater than the preset maximum temperature, or when the real-time carbon monoxide content is greater than the preset maximum carbon monoxide concentration, a fire alarm will be automatically triggered. Upon receiving a fire alarm signal, proceed to step S2.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The sealing devices on both sides of the fire source form a sealing wall. The two sealing walls isolate the fire source in a closed space. Then, by injecting inert gas to extinguish the fire, the fire can be extinguished quickly, ensuring the safety of personnel and preventing the tunnel structure from being damaged further. (2) The triggering mechanism is activated after the crowd is evacuated. The fireproof membrane forms a sealing wall, isolating the crowd from the fire source, which can ensure the safety of personnel and reduce property loss. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the mounting base installed inside a tunnel in one embodiment of the present invention; Figure 2 This is a schematic diagram of the fireproof membrane fabric after it has been unfolded inside a tunnel according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the unfolded fireproof membrane on both sides of the fire source point in one embodiment of the present invention; Figure 4 This is a schematic diagram showing the unfolded fireproof membrane on both sides of the fire source point when the fire source point is located under the mounting base in one embodiment of the present invention. Figure 5 This is a schematic diagram of the layout of a fire extinguishing device in a cross passage according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the fireproof membrane fabric in a stored state according to one embodiment of the present invention; Figure 7 This is a schematic diagram of the fireproof membrane fabric in an unfolded state according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the fireproof membrane after being filled with a water-swellable structure in one embodiment of the present invention. Figure 9 This is a schematic diagram of the installation of the triggering mechanism in one embodiment of the present invention; Figure 10 This is a flowchart of a fire extinguishing method applicable to tunnels according to the present invention.

[0019] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0020] Explanation of icon numbers: 1. Mounting bracket; 2. Sealing device; 201. Fireproof membrane cloth; 202. Triggering mechanism; 2021. Drive assembly; 2022. Support component; 203. Water-swellable structure; 204. Water spraying mechanism; 205. Base plate; 2051. Track section; 3. Fire extinguishing equipment. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] Example 1 Please see the appendix Figures 1 to 9 A fire extinguishing device suitable for use in tunnels, provided in one embodiment of the present invention, includes a plurality of mounting seats 1 spaced apart along the extension direction of the tunnel and a sealing device 2 installed on the mounting seats 1. The mounting base 1 is installed on the sidewall of the tunnel; specifically, the mounting base 1 is made of 5# lightweight channel steel and is arranged in a ring along the sidewall of the tunnel. The sealing device 2 includes: The fireproof membrane 201 has a retracted state and an unfolded state. When the fireproof membrane 201 is in the retracted state, it is stored in the mounting base 1. When the fireproof membrane 201 is in the unfolded state, it forms a sealing wall. Specifically, the fireproof membrane 201 can be made of fireproof silicone coated fabric, which is high temperature resistant and lightweight, with a fire resistance limit >2h and a unit weight <2kg / m². When the fireproof membrane 201 is in the retracted state, it is a compact roll type, occupying little space (thickness <10cm) and does not affect tunnel passage.

[0025] A triggering mechanism 202 is installed on the mounting base 1 or the side wall of the tunnel; the triggering mechanism 202 is used to support the fireproof membrane 201, so that the fireproof membrane 201 is in a retracted state; and when the triggering mechanism 202 is triggered, the fireproof membrane 201 is put into an unfolded state.

[0026] Specifically, when the triggering mechanism 202 is activated, the bottom of the fireproof membrane 201 falls down, forming a sealing wall. It should be noted that when a vehicle is at the bottom of the fireproof membrane 201, because the fireproof membrane 201 is a flexible material, the fireproof membrane 201 and the vehicle will together form a sealing wall; a sealed space is formed between the two sealing devices 2. It should be noted that the triggering mechanism 202 needs to be activated after the evacuation of people. While a sealed space is formed between the two sealing devices 2, it should be noted that in actual use, a 100% sealing effect is not achieved. For example, cable trenches and drainage ditches in tunnels may not be sealed, but this small space will not affect the actual fire extinguishing effect. Simultaneously, to accelerate fire extinguishing, fire extinguishing devices 3 can be installed inside the tunnel. These devices inject inert gas into the sealed space where the fire source is located, which can accelerate fire extinguishing. It should also be noted that, if... Figure 5 As shown, sealing devices 2 need to be installed on both sides of the tunnel cross passage and inside the cross passage.

[0027] The advantages of adopting the proposed solution are as follows: (1) The sealing devices 2 on both sides of the fire source form a sealing wall. The two sealing walls isolate the fire source in a closed space. Then, by injecting inert gas to extinguish the fire, the fire can be extinguished quickly, ensuring the safety of personnel and preventing the tunnel structure from being damaged further. (2) After the crowd is evacuated, the triggering mechanism 202 is activated, and the fireproof membrane 201 forms a sealing wall to isolate the crowd from the fire source, which can ensure the safety of the people and reduce the loss of property.

[0028] In a preferred embodiment, the sealing device 2 further includes a water-swellable structure 203 and a water spraying mechanism 204; The water-swellable structure 203 is installed on the mounting base 1; when the water-swellable structure 203 comes into contact with water, it expands and fills the fireproof membrane 201; The water spraying mechanism 204 is installed on the mounting base 1; the water spraying direction of the water spraying mechanism 204 is towards the water-swellable structure 203.

[0029] Specifically, the water-swellable structure 203 can be made of CSM-G series water-swellable materials; The material properties and parameters of CSM-G series water-swellable materials are as follows: Expansion performance: expansion ratio 180-320 times (adjustable), expands rapidly within 3-5 seconds upon contact with water, and the density after expansion is 0.06g / cm³.

[0030] Temperature resistance: Short-term temperature resistance up to 350℃, can withstand high temperature of 1000℃ fire source; long-term operating temperature up to 200℃.

[0031] Mechanical properties: Shore hardness of 82HA after solidification, compressive strength ≥1.8MPa.

[0032] Safety: Non-toxic, combustion flue gas rating meets GB8624 Class A.

[0033] The water-swellable structure 203 can also be made of SWELL-RF graphene-modified expandable rubber; The material properties and parameters of SWELL-RF graphene-modified expanded rubber are as follows: Expansion performance: expansion ratio of 200-350 times, expansion time shortened to 3 seconds under graphene reinforcement; Temperature resistance: Short-term temperature resistance up to 400℃; the graphene thermally conductive structure accelerates heat dissipation and avoids localized high-temperature failure. Mechanical properties: Hardness 85HA, tensile strength 2.2MPa; Intelligent response: Temperature-sensitive microparticles can be added, and expansion is automatically activated above 60°C.

[0034] Of course, other water-swellable materials can also be used, but they will not be listed here.

[0035] In a preferred embodiment, the bottom of the fireproof membrane 201 is connected to at least one base plate 205, and the base plate 205 is used to house the fireproof membrane 201 in the mounting base 1. The side of the base plate 205 is bent to form a track section 2051, which is connected to the triggering mechanism 202.

[0036] Specifically, the base plate 205 can accelerate the unfolding of the fireproof membrane 201 and facilitate the storage of the fireproof membrane 201 in the mounting base 1; at the same time, the side of the base plate 205 is bent to form a track part 2051, which can facilitate the connection with the triggering mechanism 202; it should be noted that the base plate 205 is relatively short, which can be set to 10 centimeters, or other lengths. Because the base plate 205 is relatively short, even if there are obstacles under the fireproof membrane 201, such as vehicles, it will not affect the fireproof membrane 201 from forming a sealing wall.

[0037] In a preferred embodiment, the triggering mechanism 202 includes a driving component 2021 and a support member 2022; The output end of the drive component 2021 is connected to the support member 2022 and is used to drive the support member 2022 to move. The support member 2022 is used to support the track section 2051, and when the drive assembly 2021 drives the support member 2022 to move to the target position, the support member 2022 disengages from the track section 2051.

[0038] Specifically, the support member 2022 serves to support the base plate 205. When the drive assembly 2021 drives the support member 2022 to move, causing the support member 2022 to detach from the track part 2051, the base plate 205 will lose the support of the support member 2022 and thus fall down together with the fireproof membrane 201 under its own gravity, causing the fireproof membrane 201 to unfold. The drive assembly 2021 can be a linear motor, cylinder, oil cylinder, gear rack assembly, crank slider or other structure that can perform linear reciprocating motion.

[0039] In a preferred embodiment, the mounting base 1 is equipped with a plurality of sealing devices 2; the plurality of sealing devices 2 are arranged sequentially along the length direction of the mounting base 1; the plurality of fireproof membrane fabrics 201 together form a sealing wall after being unfolded, and adjacent fireproof membrane fabrics 201 are squeezed against each other.

[0040] Specifically, if only one sealing device 2 is installed on a mounting base 1, the area and weight of a single fireproof membrane 201 will be very large, making it inconvenient to process and install. Furthermore, the arched design inside the tunnel makes it difficult to process and store the fireproof membrane 201. Therefore, by setting multiple sealing devices 2, each with a separate fireproof membrane 201, the processing, installation, and storage of the fireproof membrane 201 are facilitated. Additionally, after the fireproof membrane 201 is unfolded, adjacent fireproof membranes 201 will be compressed against each other. Especially after the water-swellable structure 203 expands and fills the fireproof membrane 201, the compression between adjacent fireproof membranes 201 becomes even more compact, thus eliminating the problem of poor sealing. Figure 2 As shown, six fireproof membrane sheets 201 were used in this embodiment; in other embodiments, other different numbers of fireproof membrane sheets 201 may also be used.

[0041] Example 2 Please see the appendix Figure 10 The present invention provides a fire extinguishing method suitable for tunnels in one embodiment, which extinguishes a fire source in a tunnel by using a fire extinguishing device suitable for tunnels as described in Embodiment 1, including the following steps: S1 responds to tunnel fire alarm signals to determine the location of the fire source. Specifically, the location of the fire source can be determined through fire alarm sensors, integrated radar-visual equipment, fire monitors, etc., or it can be determined through manual alarm.

[0042] S2, based on the location of the fire source, determine the two blocking devices 2 that need to be triggered; specifically, the two blocking devices 2 that need to be triggered are two blocking devices 2 located on both sides of the fire source. When these two blocking devices 2 are activated, the fire source will be in the closed space formed by these two blocking devices 2; it should be noted that if the fire source is directly below the blocking device 2, the blocking device 2 above the fire source will be considered an invalid blocking device 2.

[0043] S3, Evacuate the crowd between the two blocking devices 2 in step S2; specifically, the crowd can be evacuated through the emergency broadcast built into the tunnel.

[0044] S4, once it is confirmed that all people between the two sealing devices 2 have been evacuated, the corresponding two sealing devices 2 are triggered to form a sealed space between them, and the fire source is located within this sealed space. Specifically, the evacuation status can be determined through emergency broadcasts within the tunnel or through thermal imaging technology. The fire source will automatically extinguish itself once the oxygen concentration drops to a preset value within the sealed space.

[0045] The advantages of adopting the proposed solution are as follows: (1) Compared with the traditional method of waiting for firefighters to put out the fire, the fire extinguishing method of this plan is very efficient. Through model deduction, it can be guaranteed that the fire can be extinguished within 30 minutes of the golden rescue event.

[0046] (2) Compared with the traditional method of waiting for firefighters to put out the fire, the fire extinguishing method of this plan is safer and does not require firefighters to go deep into the tunnel to put out the fire.

[0047] In a preferred embodiment, triggering the two corresponding blocking devices 2 in step S4 includes the following steps: When the corresponding triggering mechanism 202 is activated, the bottom of the fireproof membrane 201 falls and unfolds under its own weight and the weight of the base plate 205. The corresponding water spraying mechanism 204 is activated, and the water spraying mechanism 204 sprays water onto the water-swellable structure 203. The water-swellable structure 203 fills the fireproof membrane and accelerates the unfolding of the fireproof membrane 201.

[0048] In a preferred embodiment, after step S4, the following step is also included: S41, each of the two blocking devices 2 adjacent to the two already triggered blocking devices 2 is determined as a safety redundancy blocking device 2; S42, continue to evacuate the crowd between the two safety redundancy blocking devices 2 in step S41; S43, after it is determined that all the people between the two safety redundancy blocking devices 2 in step S42 have been evacuated, the two safety redundancy blocking devices 2 are triggered; at this time, two more sealed spaces are established on both sides of the sealed space where the fire source is located as safety redundancy.

[0049] Specifically, two additional sealed spaces are built on either side of the sealed space where the fire source is located as a safety redundancy. The purpose of this is to prevent the sealed space where the fire source is located from being incompletely sealed due to special circumstances.

[0050] As a preferred embodiment, the design steps for the spacing between two adjacent mounting bases 1 are as follows: Using formula Calculate the distance between two adjacent mounting bases 1 in the normal area, where, This represents the distance (m) between two adjacent mounting bases in the standard area, where min indicates the minimum value. denoted as maximum ignition power (MW), and v as longitudinal wind speed (m / s). The critical temperature for the secondary lining of the tunnel is 250℃. The distance (m) from which the lethal concentration of flue gas diffuses. The formula for calculating the distance between two adjacent mounting bases 1 in the hazardous area is as follows: ;in, The distance (m) between two adjacent mounting bases in a standard area. The distance between two adjacent mounting bases in the hazardous area; wherein the hazardous area includes the cross passageway area and the power distribution room area.

[0051] Specifically, the spacing between mounting bases 1, obtained through scientific calculations, balances safety and economy. The maximum fire source power and longitudinal wind speed can be obtained from collecting current tunnel fire case studies; while the critical temperature of the tunnel secondary lining is a constant, determined by the structure of the tunnel secondary lining.

[0052] In a preferred embodiment, the mounting base 1 has a built-in temperature sensor and a smoke detector; The system acquires the real-time temperature detected by the temperature sensor and the real-time carbon monoxide content detected by the smoke detector. When the real-time temperature is greater than the preset maximum temperature, or when the real-time carbon monoxide content is greater than the preset maximum carbon monoxide concentration, a fire alarm will be automatically triggered. Upon receiving a fire alarm signal, proceed to step S2.

[0053] Specifically, by incorporating a temperature sensor and a smoke detector in mounting base 1, a fire alarm can be automatically triggered; the temperature sensor can be a PT100 type temperature sensor with a temperature resistance of 500℃; the smoke detector can be a laser scattering smoke detector.

[0054] As a preferred implementation, in response to a tunnel fire alarm signal, firstly, a fire alarm signal needs to be received, and then the fire alarm signal needs to be manually verified or verified by analyzing the video through AI algorithms to determine whether it is a real fire or a false alarm.

[0055] As a preferred implementation, the fire alarm device in the tunnel has a built-in self-test program. If the fire alarm device malfunctions (such as a short circuit or drift), the system automatically locks the trigger function and sounds an alarm to avoid false alarms. At the same time, multi-point backup redundancy is employed to ensure that a single point of failure does not affect the overall operation.

[0056] The above are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A fire extinguishing apparatus suitable for use in a tunnel, characterised in that, The blocking device comprises a plurality of mounting seats arranged at intervals along the extension direction of the tunnel and a blocking device mounted on the mounting seat; The mounting seat is mounted on the side wall of the tunnel; The blocking device comprises: A fireproof membrane cloth having a storage state and an unfolded state; when the fireproof membrane cloth is in the storage state, the fireproof membrane cloth is stored in the mounting seat; when the fireproof membrane cloth is in the unfolded state, the fireproof membrane cloth forms a blocking wall; A triggering mechanism mounted on the mounting seat or the side wall of the tunnel; the triggering mechanism is used to support the fireproof membrane cloth, so that the fireproof membrane cloth is in the storage state; and when the triggering mechanism is triggered, the fireproof membrane cloth enters the unfolded state.

2. A fire extinguishing apparatus suitable for use in a tunnel according to claim 1, characterised in that, The blocking device further comprises a water-swelling structure and a water spraying mechanism; The water-swelling structure is mounted on the mounting seat; when the water-swelling structure encounters water, it swells and fills in the fireproof membrane cloth; The water spraying mechanism is mounted on the mounting seat; the water spraying direction of the water spraying mechanism is towards the water-swelling structure.

3. The fire extinguishing apparatus suitable for use in a tunnel according to claim 1, wherein The bottom of the fireproof membrane cloth is connected with at least one bottom plate, which is used to store the fireproof membrane cloth in the mounting seat; The side edge of the bottom plate is bent to form a track part, which is connected with the triggering mechanism.

4. A fire extinguishing apparatus suitable for use in a tunnel according to claim 3, characterised in that, The triggering mechanism comprises a driving assembly and a support; The output end of the driving assembly is connected with the support, which is used to drive the support to move; The support is used to support the track part, and when the driving assembly drives the support to move to a target position, the support is separated from the track part.

5. The fire extinguishing apparatus suitable for use in a tunnel according to claim 1, wherein, A plurality of blocking devices are mounted on the mounting seat; the plurality of blocking devices are arranged in sequence along the length direction of the mounting seat; a plurality of fireproof membrane cloths collectively form a blocking wall after being unfolded, and adjacent two fireproof membrane cloths are pressed against each other.

6. A method for extinguishing a fire in a tunnel by using the fire extinguishing device for use in a tunnel according to any one of claims 1 to 5 to extinguish a fire source in the tunnel, characterized in that, The method comprises the following steps: S1, in response to a tunnel fire alarm signal, determining the location of the fire source; S2, according to the location of the fire source, determining two blocking devices that need to be triggered; S3, evacuating people between the two blocking devices in step S2; S4, after determining that all people between the two blocking devices have been evacuated, triggering the corresponding two blocking devices to form a closed space between the two blocking devices, and the fire source is located in the closed space.

7. A method of extinguishing a fire suitable for use in a tunnel according to claim 6 wherein, The step S4 of triggering the corresponding two blocking devices comprises the following steps: Starting the corresponding triggering mechanism, and the bottom of the fireproof membrane cloth falls and unfolds under the action of its own gravity and the gravity of the bottom plate; Starting the corresponding water spraying mechanism, and the water spraying mechanism sprays water to the water-swelling structure, the water-swelling structure fills the fireproof membrane cloth and accelerates the unfolding of the fireproof membrane cloth.

8. The method for extinguishing a fire in a tunnel according to claim 6, wherein After step S4, the following steps are further included: S41, determining two blocking devices adjacent to the two triggered blocking devices as safety redundant blocking devices; S42, continuing to evacuate people between the two safety redundant blocking devices in step S41. S43, when determining that the crowd between the two safety redundant blocking devices in step S42 is all evacuated, triggering the two safety redundant blocking devices; at this time, two closed spaces are established on both sides of the closed space where the fire source is located as safety redundancy.

9. The method for extinguishing a fire in a tunnel according to claim 6, wherein The design steps of the spacing between the two adjacent mounting seats are as follows: The spacing between two adjacent mounting seats in the regular area is calculated by the formula wherein, is the spacing between two adjacent mounting seats in the regular area, and min represents taking the minimum value, is the maximum fire source power, and v is the longitudinal wind speed, is the critical temperature of the second lining of the tunnel, is the smoke lethal concentration diffusion distance; The interval between two adjacent mounting seats in the dangerous area is calculated by the formula, ; wherein, is the interval between two adjacent mounting seats in the normal area, is the interval between two adjacent mounting seats in the dangerous area; wherein the dangerous area includes the area of the cross passage opening and the area of the power distribution room.

10. The method for extinguishing a fire in a tunnel according to claim 6, wherein The mounting seat is provided with a temperature sensor and a smoke detector; The real-time temperature detected by the temperature sensor and the real-time carbon monoxide content detected by the smoke detector are obtained; When the real-time temperature is greater than the preset maximum temperature, or the real-time carbon monoxide content is greater than the preset maximum carbon monoxide concentration, the fire alarm is automatically triggered; After receiving the fire alarm signal, step S2 is entered.

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