CN105749449A - Funnel fire extinguishing system and fire extinguishing method - Google Patents

Abstract

The invention relates to a tunnel fire extinguishing system and a fire extinguishing method. When a fire breaks out in the tunnel, press the start button, or the compressed air foam cannon automatically finds the fire area and starts automatically, or the staff starts the compressed air foam cannon remotely, and the system controller starts the compressed air foam generating device and opens the zone control valve At the same time, the water flow is automatically adjusted, and the foam liquid and gas flow are also automatically adjusted according to the water flow to form compressed air foam. The on-site personnel hold the foam gun in the box and aim at the fire area for fire fighting, or the compressed air foam gun is automatically aimed at the fire area. Spray the fire, or the staff can remotely control the compressed air foam cannon to spray the fire at the fire area; after the fire is extinguished, the system returns to the initial state under normal conditions. It solves the problems of single fire extinguishing mode, low fire extinguishing efficiency, and unfavorable for safe evacuation of personnel in the existing fire extinguishing technology in the tunnel, and ensures the high efficiency of fire extinguishing system.

Description

A kind of tunnel fire extinguishing system and fire extinguishing method

technical field

The invention belongs to the technical field of fire-fighting fixed fire extinguishing, and in particular relates to a tunnel fire extinguishing system and a fire extinguishing method.

Background technique

With the rapid development of traffic construction such as highways, railways, and subways, there are more and more long tunnels. While these long tunnels bring convenience to transportation, they also put forward higher requirements for tunnel disaster prevention and rescue. Especially for long underwater tunnels, once a fire accident occurs, it will not only cause a large number of casualties, but also damage the tunnel structure and affect transportation. For example, for an extra-long railway tunnel with a length of more than 20km, once a train fire accident occurs in the tunnel, it is difficult to drive out of the tunnel relying only on residual power, and it is necessary to carry out fire fighting in the tunnel. Therefore, from the perspective of protecting the tunnel and ensuring the safety of personnel and property, efficient and reliable fixed fire extinguishing facilities should be installed in the tunnel.

At present, the tunnel fire extinguishing technology researched and applied more at home and abroad is mainly the high-pressure water mist fire extinguishing technology. This fire extinguishing technology mainly uses the dual functions of cooling and isolating oxygen to extinguish the fire. At the same time, the fine water mist can also block heat radiation, cool down and wash dust. It has the characteristics of water saving and environmental protection. However, the high-pressure water mist fire extinguishing technology has the following disadvantages when used in tunnels:

(1) Fine water mist mainly uses physical methods to extinguish fire, and the particle size of fine water mist is small, which is easily affected by the ventilation and smoke exhaust in the tunnel, and it is difficult to penetrate the fire plume of the train fire. The actual fire extinguishing efficiency is not high;

(2) The fire extinguishing medium of ordinary fine water mist is still water, and its wetting and penetration ability is average, so the fire extinguishing effect on solid deep fires in tunnels is not good, and it can only play a role in suppressing or controlling fires, but very It is difficult to completely extinguish the fire;

(3) Spraying fine water mist in the tunnel can easily disturb the smoke layer at the top of the tunnel, causing high-temperature and toxic smoke to fill the entire tunnel, greatly reducing the visibility in the tunnel, which is not conducive to the escape and safe evacuation of personnel.

Fixed compressed air foam fire extinguishing technology is a new type of foam fire extinguishing technology gradually developed in recent years. It has fine and uniform foam structure, long liquid analysis time, high stability, and can cover the surface of the protected object for a long time. For Class A Fires, Class B fires, and fires with the characteristics of Class A and Class B mixed fires all have high fire extinguishing efficiency, and the water consumption is small, so they are suitable for use in tunnels where water resources are scarce. Therefore, fixed compressed air foam fire extinguishing technology has the ability to solve tunnel Advantages of fire fighting technical difficulties. The existing compressed air foam fire extinguishing equipment is divided into two types: mobile (such as compressed air foam fire truck) and fixed type. Among them, the mobile compressed air foam fire truck has a complex structure and requires fire fighting professionals to control the fire; the existing fixed type The compressed air foam fire extinguishing device is mainly a deluge system, that is, the fire extinguishing protection of the partition is carried out through the foam nozzle. After the compressed air foam fire extinguishing device is started, all the nozzles in a partition will spray together, and the water flow and foam state cannot be changed. In addition, since fires in trains, subway cars and other vehicles mainly occur inside the car, and the metal body of the vehicle blocks the foam, making it difficult for the foam to be applied to the inside of the car, so this deluge system is not effective for fire extinguishing in tunnels.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the existing fire extinguishing technology, and provide a tunnel fire extinguishing system and fire extinguishing method with high fire extinguishing efficiency, no damage to the high-temperature smoke layer in the tunnel, safe and reliable, and various fire extinguishing modes. The on-site personnel can manually control the fire, and can also automatically detect and track and locate the fire for targeted fire extinguishing, or manually control the fire remotely.

In order to achieve the above object, the present invention adopts a specific technical solution as follows: a tunnel fire extinguishing system, including a compressed air foam generating device, a system controller, and a compressed air foam cannon, characterized in that: it also includes a compressed air foam plug box, the The compressed air foam generating device and the system controller are arranged in the equipment chamber in the tunnel, and several compressed air foam plug boxes and several compressed air foam cannons are respectively arranged on the two side walls of the tunnel, and several compressed air foam The air foam plug box and several compressed air foam guns are respectively connected to the compressed air foam generating device through foam pipelines, and the several compressed air foam plug boxes and several compressed air foam guns are respectively connected to the system controller through signal control lines. The compressed air foam generating device is connected with the system controller through a signal control line.

A fire extinguishing method using a tunnel fire extinguishing system, characterized in that: the steps are as follows,

A) Under normal circumstances, the system is charged and the air compressor is running to ensure that the buffer gas tank and gas pipeline maintain a certain pressure of gas, and the fire pump and foam pump are on standby;

B). When a fire breaks out in the tunnel, there are three system startup modes to choose from:

①On-site personnel open one or several compressed air foam plug boxes nearby, press the start button of the alarm control unit, the alarm signal is automatically sent to the system controller through the signal control line, and the system controller opens the corresponding compressed air foam plug after receiving the signal Zone control valve of the box, and start the compressed air foam generating device;

② One or several compressed air foam cannons use their own infrared flame detectors or ultraviolet flame detectors or digital image fire detectors to automatically detect and track and locate fires, and automatically send fire alarm signals to the system controller through signal control lines, After receiving the signal, the system controller opens the zone control valve corresponding to the compressed air foam gun, and starts the compressed air foam generating device;

③ After receiving the fire alarm, the staff of the tunnel remote monitoring center can remotely start and control one or several compressed air foam cannons, and start the compressed air foam generating device;

C), the system controller automatically adjusts the water flow to the total water flow required by the activated compressed air foam plug boxes and compressed air foam guns according to the number of signals fed back by each compressed air foam plug box or compressed air foam gun, and at the same time The foam liquid and gas flow are also automatically adjusted according to the water flow, so that they are mixed according to the preset foam solution mixing ratio and gas-liquid ratio to form compressed air foam, which is sent to the compressed air foam plug box or compressed air foam gun through the foam pipeline ;

D), There are three fire extinguishing modes to choose from:

① The on-site personnel hold the foam gun in the box and spray compressed air foam at the fire area to carry out targeted fire fighting;

②The compressed air foam cannon is automatically tracked and aimed at the fire area to spray compressed air foam to extinguish the fire;

③ The staff remotely controls the compressed air foam cannon to spray compressed air foam at the fire area to extinguish the fire;

E) After the fire is extinguished, the on-site personnel press the stop button of the alarm control unit of the compressed air foam plug box to send a stop signal to the system controller, or the compressed air foam cannon can automatically send a stop signal to the system controller if it cannot detect a fire , or the staff can remotely stop each compressed air foam monitor and send a stop signal to the system controller. Liquid ratio, when all alarm control units and compressed air foam guns are stopped, the system controller will automatically shut down the compressed air foam generating device, and at the same time close the partition control valves of the compressed air foam plug box and the compressed air foam gun, and the system will return to normal the initial state of .

Beneficial effect and advantage of the present invention are:

1. The present invention adopts a fire extinguishing method combining a compressed air foam plug box and a compressed air foam cannon. Three fire extinguishing modes can be selected according to the actual fire situation in the tunnel to comprehensively ensure the fire safety of the tunnel. Fire extinguishing with foam plug box, or automatic fire extinguishing by compressed air foam cannon, or remote control of compressed air foam cannon for fire extinguishing by staff, with various fire extinguishing modes, and will not destroy and disturb the high temperature smoke layer at the top of the tunnel, which solves the problem of existing tunnel fire extinguishing The technical fire extinguishing mode is single, the fire extinguishing efficiency is low, and it is not conducive to the safe evacuation of personnel.

2. The present invention can automatically adjust the water flow according to the number of foam plug boxes and foam guns used in the actual fire scene, and automatically and accurately control the foam liquid mixing ratio and gas-liquid ratio, so that the generated compressed air foam has a stable state and good performance, ensuring The fire extinguishing efficiency of the system is improved.

3. The present invention has the advantages of simple operation, safety and reliability, and high fire extinguishing efficiency, and can be used in new tunnels or existing tunnels.

4. The compressed air foam produced by the present invention has a long liquid separation time and high stability, and can maintain a stable foam state under different water flow rates, and can effectively extinguish Class A fires, Class B fires and mixed Class A and B fires in trains. It is especially suitable for use in rescue stations with a length of 450m to 600m in extra-long railway tunnels.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention;

Fig. 2 is the structural representation of compressed air foam generating device of the present invention;

Fig. 3 is the structural representation of single foam gun compressed air foam plug box of the present invention;

Fig. 4 is the structural principle diagram of double foam gun compressed air foam plug box of the present invention;

Fig. 5 is a schematic structural diagram of the system with two compressed air foam cannons installed in the present invention.

detailed description

Further illustrate the present invention below in conjunction with embodiment and accompanying drawing.

As shown in FIG. 1 , a tunnel fire extinguishing system includes a compressed air foam generating device 1 , a system controller 2 , a compressed air foam cannon 6 , and a compressed air foam plug box 5 .

Set the compressed air foam generating device 1 and the system controller 2 in the equipment cavern in the tunnel, and install several compressed air foam plug boxes 5 alternately and fixedly on the two side walls of the tunnel according to the same distance, that is, the tunnel on one side Several compressed air foam plug boxes 5 are arranged at the same distance on the wall, and one compressed air foam plug box 5 is arranged on the tunnel wall on the other side corresponding to the middle position between every two compressed air foam plug boxes 5, and the same side The distance between two adjacent compressed air foam plug boxes 5 is 30m to 60m, and each compressed air foam plug box 5 is 0.5m to 1.5m away from the ground.

A compressed air foam cannon 6 is installed above each compressed air foam plug box 5, and the compressed air foam cannon 6 is 3m～6m away from the ground.

Several compressed air foam plug boxes 5 and several compressed air foam cannons 6 are respectively connected to the compressed air foam generating device 1 through the foam pipeline 3, and the compressed air foam generated by the compressed air foam generating device 1 is transported to each The compressed air foam plug box 5 and the compressed air foam gun 6, several compressed air foam plug boxes 5 and several compressed air foam guns 6 are respectively connected with the system controller 2 through the signal control line 4, and the compressed air foam generating device 1 passes the signal The control line 4 is connected to the system controller 2 .

The system controller 2 is connected to the tunnel remote monitoring center through the signal control line. After the staff receives the fire alarm, they can remotely start and control the compressed air foam cannons 6 for manual spraying to extinguish the fire.

As shown in Figure 2, the compressed air foam generating device 1 includes a fire pump 1-4, a foam liquid tank 1-5, a foam liquid pump 1-8, an air compressor 1-12, a buffer gas tank 1-13, and a foam generating Device 1-17, also includes water tank 1-1, shut-off valve I1-2, filter I1-3, shut-off valve II1-6, filter II1-7, one-way valve I1-9, water flow regulating valve 1- 10. Water flow meter 1-11, gas flow meter 1-14, gas flow regulating valve 1-15, one-way valve II 1-16, foam main pipe 1-18, the outlet of the water tank 1-1 passes through the stop valve in turn I1-2, filter I1-3 are connected to the inlet of the fire pump 1-4, and the outlet of the fire pump 1-4 passes through the water flow regulating valve 1-10, the water flow meter 1-11 and the foam generator 1-17 The water flow inlet is connected, and the outlet of the foam liquid tank 1-5 passes through the shut-off valve II1-6, the filter II1-7, the foam liquid pump 1-8, the one-way valve I1-9, the water flow regulating valve 1-10 and the water The pipeline connection between the flow meters 1-11, the outlet of the air compressor 1-12 passes through the buffer gas tank 1-13, the gas flow meter 1-14, the gas flow regulating valve 1-15, and the one-way valve II 1- 16 is connected to the gas inlet of the foam generator 1-17; the system controller 2 is respectively connected to the output signal end of the gas flowmeter 1-14, the flow control input end of the foam liquid pump 1-8, and the water flow rate through the signal control line. The control input end of the regulating valve 1-10, the signal output end of the water flow meter 1-11, and the control input end of the gas flow regulating valve 1-15 are connected; the foam outlet of the foam generator 1-17 passes through the foam dry pipe 1-18 It communicates with foam line 3.

As shown in Fig. 3 and Fig. 4, the compressed air foam plug box 5 includes a single foam gun compressed air foam plug box 5-1 and a double foam gun compressed air foam plug box 5-2.

The single foam gun compressed air foam plug box 5-1 includes a set of compressed air foam plugs installed in the box body 5-11, and a set of compressed air foam plugs includes a movable joint 5-12, a foam branch pipe 5-13, and an alarm control unit 5-14, side arm 5-15, zone control valve 5-16, fire hose reel 5-17, fire hose 5-18, foam gun 5-19.

The fire-fighting hose reel 5-17 is fixed in the casing 5-11 by side arm 5-15 and movable joint 5-12, is provided with fire-fighting hose 5-18 on the fire-fighting hose reel 5-17, and fire-fighting soft One end of the pipe 5-18 is connected to the foam gun 5-19, and the other end of the fire hose 5-18 is connected to the outlet of the foam branch pipe 5-13 fixed on the box body 5-11 through the partition control valve 5-16, and the foam branch pipe 5 -13 The entrance extends out of the box body 5-11 and communicates with the foam pipeline 3 of the system, the alarm control unit 5-14 is fixed in the box body 5-11, and the first signal output terminal of the alarm control unit 5-14 is connected with the partition control The valves 5-16 are connected, and the second signal output end is connected with the system controller 2 through the signal control line 4 .

As shown in Figure 4, the composition of the double foam gun compressed air foam plug box 5-2 is to install two sets of independent compressed air foam plugs with the same structure in a box body 5-11. This can not only prevent the failure of the entire hitch box due to failure of one set, and ensure the safety and reliability of the system, but also reduce the foam flow rate of a single foam gun, making it easier to control.

The above-mentioned fire-fighting water pumps 1-4 adopt fire-fighting centrifugal pumps or variable-frequency water pumps, and the outlet pressure is 0.4-1.6Mpa.

As shown in Figure 5, on the top of each compressed air foam plug box 5, two compressed air foam guns 6 are installed symmetrically with the compressed air foam plug box 5, and the distance between the two compressed air foam guns 6 is the same Half of the distance between two adjacent compressed air foam plug boxes 5 on the side, the compressed air foam cannon 6 is fixed on the tunnel wall, 3m～6m above the ground. For example, when the distance d between two adjacent compressed air foam plug boxes 5 on the same side is 60m, then the distance d between two compressed air foam cannons 6 installed symmetrically with a certain compressed air foam plug box 5 as the center The distance is d/2=30m.

The above-mentioned foam liquid pumps 1-8 adopt gear pumps, diaphragm pumps, plunger pumps or metering pumps, and the pressure of the foam liquid is 0.4-2.5Mpa.

The above-mentioned air compressors 1-12 are screw air compressors or vane air compressors, and the air supply pressure range is 0.4-1.6Mpa.

The above-mentioned water flowmeter 1-11 adopts a liquid turbine flowmeter or an electromagnetic flowmeter or a vortex flowmeter.

Above-mentioned gas flowmeter 1-14 adopts vortex flowmeter or turbine flowmeter.

The above-mentioned water flow regulating valve adopts an electric metering control valve, such as the 381LSA electric metering control valve.

The above-mentioned gas flow regulating valve adopts an electric metering control valve, such as the 381LSB electric metering control valve.

The above-mentioned partition control valves 5-16 adopt electric control valves.

The length of the fire hose 5-18 provided on the fire hose reel 5-17 is 10m～40m.

The above-mentioned compressed air foam cannon 6 adopts the prior art, such as the compressed air foam intelligent cannon or the compressed air foam automatic search gun in the patent No. 201510183844.9, its working principle is as follows: the compressed air foam cannon 6 utilizes its own infrared flame detector Ultraviolet flame detectors and digital image fire detectors automatically detect and track early fires in the tunnel, and automatically send alarm signals to the system controller 2 through the signal control line, and the system controller 2 controls the opening and closing of its partition control valves. Closing and starting and stopping of the compressed air foam generating device 1.

In addition, each compressed air foam cannon 6 and system controller 2 are connected to the tunnel remote monitoring center through a signal control line. After receiving a fire alarm, the staff can remotely start and control each compressed air foam cannon 6 for manual spraying to extinguish the fire.

The above-mentioned system controller 2 adopts industrially mature PLC control technology, such as CP1H PLC of Omron Corporation.

The system controller 2 programs and presets basic parameters such as alarm signals, zone control valves, water flow, foam liquid flow, and gas flow. Number of signals, automatically open the zone control valves corresponding to each compressed air foam plug box 5 and compressed air foam gun 6, start the compressed air foam generating device 1, and automatically adjust the speed of the fire pump 1-4 or the water flow regulating valve 1-10 Adjust the water flow to the total water flow required by the activated compressed air foam plug box 5 and compressed air foam cannon 6; at the same time, the system controller 2 adjusts the speed of the foam liquid pump 1-8 in real time according to the change of water flow , automatically adjust the flow rate of the foam solution so that it injects the foam solution according to the preset mixing ratio of the foam solution. The gas flow rate makes it inject compressed air according to the preset gas-liquid ratio, and the gas-liquid is fully mixed to generate compressed air foam, which is transported to each compressed air foam plug box 5 and compressed air foam cannon 6 through the foam pipeline for spraying fire extinguishing.

A fire extinguishing method of a tunnel fire extinguishing system, the steps are as follows:

A) Under normal circumstances, the system is charged and the air compressor 1-12 is running to ensure that the buffer gas tank 1-13 and the gas pipeline maintain a certain pressure of gas. The fire pump 1-4 and the foam liquid Pumps 1-8 are on standby.

B). When a fire breaks out in the tunnel, there are three system startup modes to choose from:

①On-site personnel open one or several compressed air foam plug boxes 5 nearby, press the start button of the alarm control unit 5-14, the alarm signal is automatically sent to the system controller 2 through the signal control line, and the system controller 2 receives the signal Open the zone control valve 5-16 corresponding to the compressed air foam plug box 5, and start the compressed air foam generating device 1.

② One or several compressed air foam cannons 6 use their own infrared flame detectors or ultraviolet flame detectors or digital image fire detectors to automatically detect and track and locate fires, and automatically send fire alarm signals to the system controller through signal control lines 2. The system controller 2 opens the zone control valve corresponding to the compressed air foam cannon 6 after receiving the signal, and starts the compressed air foam generating device 1 .

③ The staff of the tunnel remote monitoring center can remotely start and control one or several compressed air foam cannons 6 and start the compressed air foam generating device 1 after receiving the fire alarm.

C), the system controller 2 automatically adjusts the water flow rate to the activated compressed air foam plug box 5 and compressed air foam gun 6 according to the number of signals fed back by each compressed air foam plug box 5 or compressed air foam gun 6 The total water flow, and the foam liquid and gas flow are also automatically adjusted according to the water flow, so that they are mixed according to the preset foam solution mixing ratio and gas-liquid ratio to form compressed air foam, which is sent to the compressed air foam plug through the foam pipeline 3 box 5 or compressed air foam cannon 6.

D), There are three fire extinguishing modes to choose from:

① Use the foam gun 5-19 in the box 5-11 held by the on-site personnel to spray compressed air foam at the fire area to carry out targeted fire fighting.

②The compressed air foam cannon 6 is automatically tracked and aimed at the fire area to spray compressed air foam to extinguish the fire.

③ The staff remotely controls the compressed air foam cannon 6 to spray compressed air foam at the fire area to extinguish the fire.

E) After the fire extinguishing is completed, the on-site personnel press the stop button of the alarm control unit 5-14 of the compressed air foam plug box 5 to send a stop signal to the system controller 2, or the compressed air foam cannon 6 will automatically send a signal to the system controller if the fire is not detected. The system controller 2 sends a stop signal, or the staff remotely stops each compressed air foam cannon 6 and sends a stop signal to the system controller 2, and the system controller 2 is based on the signals fed back by each compressed air foam plug box 5 and compressed air foam cannon 6 Quantity, adjust the water flow rate, foam solution mixing ratio and gas-liquid ratio in time, when all alarm control units 5-14 and compressed air foam gun 6 are stopped, the system controller 2 automatically turns off the compressed air foam generating device 1, and at the same time turns off the compressed air The partition control valves of the foam plug box 5 and the compressed air foam gun 6, the system returns to the initial state under normal conditions.

In the above-described embodiment, the compressed air foam generating device 1 adopts a hierarchical mode to control the water flow according to the number of starting signals fed back by the system controller 2, that is, the system controller 2 controls the water flow according to the starting compressed air foam plug box 5 foam gun 5-19 and the compressed air The quantity of the foam cannon 6 automatically adjusts the basic parameters of the compressed air foam generating device 1, as shown in Table 1,

Example 1, when two compressed air foam plug boxes 5 are activated in an actual fire, the system controller 2 automatically adjusts the liquid flow rate to 2 according to the number of signals fed back by the control button 5-14 of the compressed air foam plug box 5 alarm control unit. Adjust to 480L/min, supply foam liquid and air according to 1% mixing ratio and 12:1 gas-liquid ratio at the same time, generate compressed air foam, and send it to the compressed air foam plug box 5 through the foam pipeline to meet the requirements of the two compressed air The use requirements of the foam suppository box 5.

Example 2, when eight compressed air foam plug boxes 5 are activated in an actual fire, the system controller 2 automatically adjusts the liquid flow rate to 8 according to the number of signals fed back by the control buttons of the compressed air foam plug box 5 alarm control unit 5-4. Adjust to 1920L/min, supply foam liquid and air according to 1% mixing ratio and 12:1 gas-liquid ratio at the same time, generate compressed air foam, and send it to compressed air foam plug box 5 through foam pipeline to meet the requirements of eight compressed air The use requirements of the foam suppository box 5.

Claims (6)

1. null1. a tunnel fire system，Including compressed-air foam generator (1)、System controller (2)、Compressed-air foam big gun (6)，It is characterized in that: also include compressed-air foam bolt housing (5)，Described compressed-air foam generator (1)、System controller (2) is arranged in the equipment cavern in tunnel，Several described compressed-air foam bolt housings (5)、Several compressed-air foam big guns (6) are separately positioned on the two side in tunnel，Several compressed-air foam bolt housings (5) and several compressed-air foam big gun (6) are connected with compressed-air foam generator (1) respectively through foam line (3)，Several compressed-air foam bolt housings (5) and several compressed-air foam big gun (6) are connected with system controller (2) respectively through signal control line (4)，Described compressed-air foam generator (1) is connected with system controller (2) by signal control line (4).
2. 2. a kind of tunnel fire system according to claim 1, it is characterized in that: several described compressed-air foam bolt housings (5) are alternately laid on the two side in tunnel according to uniform distances, namely the tunnel wall of side lays several compressed-air foam bolt housings (5) according to uniform distances, the tunnel wall of the opposite side corresponding to centre position between each two compressed-air foam bolt housing (5) is laid a compressed-air foam bolt housing (5), distance between two adjacent compressed-air foam bolt housings (5) of the same side is 30m～60m, each compressed-air foam bolt housing (5) is from ground 0.5m～1.5m；

   A compressed-air foam big gun (6) installed above or two compressed-air foam big guns (6) each compressed-air foam bolt housing (5), the half of the spacing of distance is the same side two adjacent compressed-air foam bolt housings (5) between two compressed-air foam big guns (6), compressed-air foam big gun (6) is fixed in tunnel wall, from ground 3m～6m.
3. null3. a kind of tunnel fire system according to claim 1，Described compressed-air foam generator (1)，Including fire pump (1-4)、Concentrated tank (1-5)、Foam pump (1-8)、Air compressor (1-12)、Buffering gas tank (1-13)、Foam producer (1-17)，It is characterized in that: also include water pot (1-1)、Stop valve I (1-2)、Filter I (1-3)、Stop valve II (1-6)、Filter II (1-7)、Check valve I (1-9)、Water flow adjusting valve (1-10)、Water ga(u)ge (1-11)、Gas flowmeter (1-14)、Gas flow regulating valve (1-15)、Check valve II (1-16)、Foam main (1-18)，Described water pot (1-1) outlet passes sequentially through stop valve I (1-2)、Filter I (1-3) is connected with the entrance of fire pump (1-4)，Described fire pump (1-4) exports by Water flow adjusting valve (1-10)、Water ga(u)ge (1-11) is connected with the flow inlet of foam producer (1-17)，Described concentrated tank (1-5) outlet passes sequentially through stop valve II (1-6)、Filter II (1-7)、Foam pump (1-8)、Pipeline between check valve I (1-9) with Water flow adjusting valve (1-10) and water ga(u)ge (1-11) is connected，Described air compressor (1-12) outlet passes sequentially through buffering gas tank (1-13)、Gas flowmeter (1-14)、Gas flow regulating valve (1-15)、Check valve II (1-16) is connected with the gas feed of foam producer (1-17)；Described system controller (2) by signal control line respectively with the output signal end of gas flowmeter (1-14), the flow-control input of foam pump (1-8), the control input of Water flow adjusting valve (1-10), the signal output part of water ga(u)ge (1-11), gas flow regulating valve (1-15) control input be connected；The foam outlet of foam producer (1-17) is connected with foam line (3) by foam main (1-18).
4. 4. a kind of tunnel fire system according to claim 1, it is characterised in that:

   nullDescribed compressed-air foam bolt housing (5) includes single foam gun compressed-air foam bolt housing (5-1) and double; two foam gun compressed-air foam bolt housing (5-2)，Described single foam gun compressed-air foam bolt housing (5-1) includes being provided with a set of compressed-air foam bolt in casing (5-11)，A set of compressed-air foam bolt includes moveable hinge joint (5-12)、Foam arm (5-13)、Alarm control unit (5-14)、Side arm (5-15)、Partitioning control valve (5-16)、Fire hose reel (5-17)、Fire hose (5-18)、Foam gun (5-19)，Described fire hose reel (5-17) is fixed in casing (5-11) by side arm (5-15) and moveable hinge joint (5-12)，Fire hose reel (5-17) is provided with fire hose (5-18)，One end of fire hose (5-18) connects foam gun (5-19)，The other end of fire hose (5-18) is connected with foam arm (5-13) outlet being fixed on casing (5-11) by partitioning control valve (5-16)，Foam arm (5-13) entrance stretches out casing (5-11) and connects with the foam line (3) of system outward，Described alarm control unit (5-14) is fixed in casing (5-11)，First signal output part of described alarm control unit (5-14) is connected with partitioning control valve (5-16)，Secondary signal outfan is connected with system controller (2) by signal control line (4)；

   Described pair of foam gun compressed-air foam bolt housing (5-2) includes being provided with two set compressed-air foam bolts in casing (5-11).
5. 5. a kind of tunnel fire system according to claim 4, it is characterised in that: the length of the fire hose (5-8) that described fire hose reel (5-17) is provided with is 10m～40m.
6. 6. the extinguishing method of the tunnel fire system that a kind adopts described in claim 1, it is characterised in that: step is as follows,

   A), under normal circumstances, system is in electriferous state, air compressor (1-12) is in running status, and to ensure to maintain in buffering gas tank (1-13) and gas piping the gas of certain pressure, fire pump (1-4) and foam pump (1-8) are in holding state；

   B), when breaking out of fire in tunnel, have three kinds of system start-up mode selective:

   1. Field Force opens one or several compressed-air foam bolt housing (5) nearby, the startup button of the control unit that pushes for emergency (5-14), alarm signal is sent automatically to system controller (2) by signal control line, system controller (2) opens the partitioning control valve (5-16) of corresponding compressed-air foam bolt housing (5) after receiving signal, and starts contracting air foam generator (1)；

   2. one or several compressed-air foam big gun (6) utilize self infrared flame detector or ultraviolet flame detector or digital picture fire detector automatic acquisition location fire, and fire alarm signal is sent automatically to system controller (2) by signal control line, system controller (2) opens the partitioning control valve of corresponding compressed-air foam big gun (6) after receiving signal, and starts contracting air foam generator (1)；

   3. after remote monitoring center staff in tunnel receives fire alarm, it is possible to remote activation and manipulation one or several compressed-air foam big gun (6), and contracting air foam generator (1) is started；

   C), the number of signals that system controller (2) feeds back according to each compressed-air foam bolt housing (5) or each compressed-air foam big gun (6), automatically discharge is adjusted to the total water current amount needed for the compressed-air foam bolt housing (5) having been turned on and compressed-air foam big gun (6), foam solution and gas flow adjust automatically also according to discharge simultaneously, it is made to mix according to default foam solution mixing ratio and gas liquid ratio, form compressed-air foam, and be delivered to compressed-air foam bolt housing (5) or compressed-air foam big gun (6) by foam line (3)；

   D), have three kinds of modes of fire suppression selective:

   1. it is directed at fire area jet compression air foam by the foam gun (5-19) in the hand-held casing of Field Force (5-11), carries out fire extinguishing targetedly and put out a fire to save life and property；

   2. it is directed at fire area jet compression air foam by compressed-air foam big gun (6) from motion tracking, puts out a fire；

   3. by staff's remote control compressed-air foam big gun (6) alignment fire area jet compression air foam, put out a fire；

   nullE)、After fire extinguishing，Field Force presses the stop button of compressed-air foam bolt housing (5) alarm control unit (5-14)，Stop signal is sent to system controller (2)，Or compressed-air foam big gun (6) detection sends stop signal less than fire from trend system controller (2)，Or staff remotely stops each compressed-air foam big gun (6)，Stop signal is sent to system controller (2)，The number of signals that system controller (2) feeds back according to each compressed-air foam bolt housing (5) and compressed-air foam big gun (6)，Adjust discharge in time、Foam solution mixing ratio and gas liquid ratio，When All Alerts control unit (5-14) and compressed-air foam big gun (6) all stop，System controller (2) is automatically switched off compressed-air foam generator (1)，Simultaneously close off compressed-air foam bolt housing (5) and the partitioning control valve of compressed-air foam big gun (6)，System recovery original state under normal circumstances.