CN214376834U - Fire safety system for vehicle - Google Patents

Abstract

The utility model provides a vehicle fire safety system, it includes power, panel module, data processing module, detection control module, fire extinguishing module includes the fire extinguishing pipe of predetermined quantity, and the fire extinguishing pipe includes polyamide body, ooff valve, one-way seal valve, and when the predetermined conflagration breaing out, detection control module control ooff valve opens and thereby initiatively releases fire extinguishing medium and put out a fire the action, or burns to polyamide body local bursting passively releases fire extinguishing medium and put out a fire the action by the conflagration; the detection control module comprises detection controllers which correspond to the fire extinguishing pipes one by one, and the detection controllers are used for detecting fire early warning information of a preset part and uploading the fire early warning information to the data processing module; the data processing module is used for receiving the fire early warning information, collecting and processing the fire early warning information to form a fire early warning signal and sending the fire early warning signal to the panel module; the panel module is used for a user to check fire early warning information of each preset part of the vehicle body.

Description

Fire safety system for vehicle

Technical Field

The utility model relates to a fire control technical field, especially an automobile-used fire control safety coefficient.

Background

Nowadays, the ignition phenomenon of vehicles is frequent, the aging of circuits and oil circuits of traditional vehicles causes electric leakage and oil leakage, and the ignition is caused by the overheating of tires; when the engine works, the temperature of the ignition coil is very high, the temperature of the electric leakage part is increased, and the ignition can be realized when oil sludge and the like are encountered; when a low-voltage line is aged, overloaded or worn, a grounding piece leaks electricity, and a large amount of heat energy is generated at the grounding piece, so that if the grounding piece is contacted with inflammable substances, a fire can be caused; fire may also occur when a vehicle is hit, causing a combustible to leak and come into contact with a fire source; in addition, due to the rapid development of electric vehicles, batteries of pure electric vehicles and hybrid electric vehicles can be ignited due to thermal runaway, which means that the current and the battery temperature of a storage battery generate an accumulative enhancement effect during constant-voltage charging and are gradually damaged to cause fire; and large transport vehicles such as high-speed rails, motor trains and the like not only have a large number of storage batteries/lithium batteries, but also have a large number of electrical devices arranged on the vehicle body, so that irremediable loss can be caused once a fire disaster is not quickly extinguished.

At present, aiming at fire extinguishing of large vehicles, a general fire extinguishing system adopts the matching of a fire extinguishing pipeline and a fire extinguishing tank to realize fire extinguishing, and small vehicles are provided with traditional portable fire extinguishers due to small size, all fire extinguishing methods have hysteresis, so that the fire extinguishing system is difficult to quickly extinguish and further causes loss when a fire disaster occurs, particularly, large vehicles cannot extinguish the fire when control signals of the fire extinguishing tank are lost when the fire disaster occurs, therefore, the existing large vehicle fire extinguishing system has low safety and relatively high maintenance cost, and small vehicles are artificially extinguished, so that the safety and the fire extinguishing efficiency are also low, therefore, aiming at the problems of fire extinguishing efficiency and safety, a new fire extinguishing safety system suitable for various types of vehicles needs to be provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a fire safety system for a vehicle.

The utility model provides a technical scheme that its technical problem adopted is: provides a fire-fighting safety system for a vehicle, which comprises a power supply, a panel module, a data processing module, a detection control module and a fire extinguishing module which are sequentially and electrically connected through a CAN bus, wherein the fire extinguishing module comprises a predetermined number of fire extinguishing pipes which are respectively installed at predetermined positions of a vehicle body, the fire extinguishing pipe comprises a polyamide pipe body, a switch valve and a one-way sealing valve which are respectively arranged at two ends of the polyamide pipe body, fire extinguishing medium is filled into the polyamide pipe body through the one-way sealing valve from the outside, when the detection control module detects that the preset part of the vehicle body is in fire, the detection control module controls the switch valve to be opened, so that the fire extinguishing medium is actively released to extinguish the fire, or the fire burns the polyamide tube body to locally burst, thereby passively releasing the fire extinguishing medium to carry out fire extinguishing action; the detection control module comprises a preset number of detection controllers which correspond to the fire extinguishing pipes one by one, the detection controllers are respectively connected with the switch valves of the fire extinguishing pipes one by one and are installed at preset positions of a vehicle body, and the detection controllers are used for detecting fire early warning information of the preset positions, uploading the fire early warning information to the data processing module and controlling the switch valves to be opened actively; the data processing module is used for receiving the fire early warning information sent by the detection control module, collecting and processing the fire early warning information to form a fire early warning signal and sending the fire early warning signal to the panel module; the panel module is used for a user to check fire early warning information of each preset part of the vehicle body.

Preferably, the detection controller comprises a temperature sensor, a smoke concentration sensor and a carbon monoxide concentration sensor, when the detection controller detects that the temperature, the smoke concentration or the carbon monoxide concentration of a preset part exceeds a first preset value, the data processing module sends a fire early warning signal to a user through the panel module, when the detection controller detects that the temperature, the smoke concentration or the carbon monoxide concentration of the preset part exceeds a second preset value, the switching valve is controlled to be opened, so that a fire extinguishing medium is actively released to perform fire extinguishing/cooling actions, and the carbon monoxide is determined to be a typical detection basis through the result of gas analysis in a gas production test so as to judge a battery thermal runaway precursor, so as to be applied to the fire prevention technology of the power battery of the electric vehicle, wherein the data processing module redundantly fits data of a plurality of groups of sensors in the same environment through data of a plurality of longitudinal sensors, simulating data characterization curves of different materials and different environments; the continuous time algorithm is transversely carried out on the historical data of the sensor, noise interference is eliminated, and the problems of missing report, false report and early warning lag of the traditional threshold value method monitoring mode are effectively solved; different methods such as puncture, blunt needle backlog and the like are vertically adopted to simulate thermal runaway processes of different types of power batteries with different capacities, internal relations among various variables caused by thermal runaway are summarized by three-dimensional fusion and mathematical means on the basis of a large amount of experimental and real operation data, and an extremely early, highly reliable and self-operating lithium ion battery thermal runaway model is formed by adopting a neurology principle so as to ensure that different types of environments can accurately perform fire early warning in real time and realize early warning and intelligent control of fire hidden dangers of the batteries.

Preferably, the fire-fighting safety system further comprises a 4G communication module and a GPS positioning module, the 4G communication module is used for realizing data communication between the fire-fighting safety system and the internet, the data processing module uploads fire early warning information to a cloud server through the 4G communication module for a big data platform to perform fire early warning analysis, and a user or a fireman realizes rapid positioning of a fire pre-occurrence place according to the GPS positioning module.

Preferably, the fire extinguishing system further comprises an emergency starting button, the emergency starting button is electrically connected with the data processing module and sends an emergency control signal to the detection control module through the data processing module, and the detection control module controls the fire extinguishing module to carry out active fire extinguishing operation according to the emergency control signal.

Preferably, the switching valve is provided with an electric control connecting wire connected with the detection controller, the electric control connecting wire is connected with the firing pin device, the bottom of the firing pin device is provided with a spring, the bottom of the spring is connected with the firing pin, the lower end of the firing pin is provided with a sealing membrane and a pressing ring, the switching valve comprises an outlet interface, the outlet interface is provided with a fire extinguishing medium outlet, the outlet interface is connected with a fire extinguishing medium outlet cavity, the sealing membrane and the pressing ring are fixed on the lower side inside the switching valve through a pressing bolt, the lower side of the switching valve is of a hollow structure, the switching valve is controlled through electric control connection with the detection controller to push the firing pin to puncture the sealing membrane and then reset, and the fire extinguishing medium is released to the outside through the fire extinguishing medium outlet to achieve a fire extinguishing effect.

Preferably, the pressing ring is a fixed gasket.

Preferably, the sealing membrane is fixed between fixing gaskets, and the fixing gaskets are fixed below the compression bolts.

Preferably, the center of the compression bolt is of a hollow structure, and the center of the compression bolt is a firing pin hole.

Preferably, the connecting pieces are arranged on the lower sides of the sealing diaphragm and the pressing ring, the outer portion of each connecting piece is connected with the corresponding pipe body, a buckling piece is further arranged outside each pipe body, a port of each pipe body is arranged between each connecting piece and the corresponding buckling piece, and the buckling pieces are fixedly connected with the bottom of the switch valve to enable the pipe bodies to be in sealing connection with the switch valve.

Preferably, the connecting piece is of a hollow structure, and a fire extinguishing medium channel is reserved.

Preferably, the plug comprises a second connecting piece, a valve core is arranged on the second connecting piece, the outer portion of the second connecting piece is connected with the pipe body, a second buckling piece is further arranged outside the pipe body and fixed on the plug, and the plug is connected with the pipe body in a sealing mode.

Preferably, the striker hole diameter is larger than the outer diameter of the striker.

Preferably, the fire extinguishing medium is hexafluoropropane or heptafluoropropane or perfluorohexanone, hexafluoropropane is often used for portable fire extinguisher equipment, is applicable to open, half open space and put out a fire, heptafluoropropane is a clean gas chemical fire extinguishing agent which mainly has chemical fire extinguishing and physical fire extinguishing, has the characteristics of no color, no odor, low toxicity, no electricity and no pollution, is liquefied and stored at normal temperature, has no destructive effect on the atmospheric ozone layer, perfluorohexanone is clear, colorless and tasteless liquid, achieves the effect of putting out a fire mainly by means of heat absorption, lithium ion battery fire has the relighting property, the cooling is an effective means after the fire is formed, and the heptafluoropropane has excellent environmental performance and is a green environment-friendly fire extinguishing agent.

Preferably: the fire extinguishing module is arranged in the battery box.

The utility model provides a vehicle fire safety system, through fixed point arrangement detection control module and fire extinguishing module, realize point-to-point conflagration high-arouse fire extinguishing, simultaneously, based on the characteristic of polyamide body, when the control of collection control module became invalid, the conflagration emergence point made the pressure increase in the fire extinguishing pipe in the process that the temperature rose rapidly, in the moment that the conflagration burns out the fire tube, the fire extinguishing medium in the fire extinguishing pipe erupted in the twinkling of an eye and realizes putting out a fire passively, this vehicle fire safety system has higher reliability and fire extinguishing efficiency, simultaneously, detection control module and fire extinguishing module are compared with the fire extinguishing system of current fire extinguishing tank system type, and the volume is less, and the pipe arrangement is simple, has the characteristics of dexterous easy installation, and the commonality is stronger, in addition, data processing module can carry out collection processing to conflagration early warning information, cooperation panel module lets the user detect the early warning to predetermined position, the quality of fire early warning is improved, and finally, the maintenance cost of the fire safety system for the user can be reduced by the modularized fire safety system.

Drawings

Fig. 1 is a schematic structural view of a fire safety system for a vehicle according to the present invention;

FIG. 2 is a diagram of a specific implementation of the vehicular fire safety system according to the present invention;

FIG. 3 is a schematic view of the overall structure of the fire extinguishing tube of the present invention;

FIG. 4 is a schematic view of a partial structure of the fire extinguishing tube of the present invention;

FIG. 5 is a schematic view showing the internal structure of the fire extinguishing tube of FIG. 4;

fig. 6 is a partial schematic view of portion a of fig. 5.

Detailed Description

The invention will now be further described with reference to the accompanying drawings, in which:

referring to fig. 1, the utility model provides a vehicular fire safety system, including a power, and panel module, data processing module, detection control module, the fire extinguishing module that connects gradually the electricity through the CAN bus, wherein, the fire extinguishing module includes the fire extinguishing pipe of predetermined quantity, and these fire extinguishing pipes are installed respectively at the predetermined position of automobile body, the fire extinguishing pipe includes a polyamide body and installs a ooff valve and a one-way seal valve at this polyamide body both ends respectively, the outside is through one-way seal valve fills into fire extinguishing medium to the polyamide body, when the detection control module detects the predetermined position of automobile body and breaks out the fire, control module control ooff valve opens by detection to initiatively release fire extinguishing medium and carry out the action of putting out the fire, or burn to polyamide body local bursting by the fire, thereby release passive fire extinguishing medium and carry out the action of putting out the fire, the fire extinguishing tube is characterized in that for vehicles of different sizes, the preset part of a small vehicle can be under a hood of the vehicle, a large vehicle can be near an oil tank and a battery, a high-speed rail or a motor car can be a carriage part close to electrical equipment, and the size of the fire extinguishing tube can be customized according to the space of the installation part; the detection control module comprises a preset number of detection controllers which correspond to the fire extinguishing pipes one by one, the detection controllers are respectively connected with the switch valves of the fire extinguishing pipes one by one and are installed at preset positions of a vehicle body, and the detection controllers are used for detecting fire early warning information of the preset positions, uploading the fire early warning information to the data processing module and controlling the switch valves to be opened actively; the data processing module is used for receiving the fire early warning information sent by the detection control module, collecting and processing the fire early warning information to form a fire early warning signal and sending the fire early warning signal to the panel module; the panel module is used for a user to check fire early warning information of each preset part of the vehicle body.

Referring to fig. 2, the vehicular fire safety system will be further described with respect to an embodiment in which the vehicular fire safety system is a battery pack of an electric vehicle, the electric vehicle further includes a BCU battery management unit connected via a BAT CAN bus and a plurality of BMU battery detection units in the battery packs, wherein the detection controller and the fire extinguishing pipes are respectively installed in the corresponding battery packs in a one-to-one correspondence manner and connected to a data processing module via the fire extinguishing CAN bus, the data processing module is connected to a panel module via the EV CAN bus, the panel module is a central control panel of the vehicle, and in the present embodiment, the data processing module is further electrically connected to an emergency start button, which sends an emergency control signal to the detection control module via the data processing module, the detection control module controls the fire extinguishing module to actively extinguish fire according to the emergency control signal.

Specifically, the detection controller comprises a temperature sensor, a smoke concentration sensor and a carbon monoxide concentration sensor, when the detection controller detects that the temperature, the smoke concentration or the carbon monoxide concentration of a preset part exceeds a first preset value, the data processing module sends a fire early warning signal to a user through the panel module, when the detection controller detects that the temperature, the smoke concentration or the carbon monoxide concentration of the preset part exceeds a second preset value, the switching valve is controlled to be opened, so that a fire extinguishing medium is actively released to perform fire extinguishing/cooling actions, and the carbon monoxide is determined to be a typical detection basis through the result of gas analysis in a gas production test to judge a battery thermal runaway precursor so as to be applied to the power battery fire prevention technology of the electric vehicle, wherein the data processing module performs data redundancy through a plurality of longitudinal sensors, namely performs multiple fitting on a plurality of groups of sensor data under the same environment, simulating data characterization curves of different materials and different environments; the continuous time algorithm is transversely carried out on the historical data of the sensor, noise interference is eliminated, and the problems of missing report, false report and early warning lag of the traditional threshold value method monitoring mode are effectively solved; different methods such as puncture, blunt needle backlog and the like are vertically adopted to simulate thermal runaway processes of different types of power batteries with different capacities, internal relations among various variables caused by thermal runaway are summarized by three-dimensional fusion and mathematical means on the basis of a large amount of experimental and real operation data, and an extremely early, highly reliable and self-operating lithium ion battery thermal runaway model is formed by adopting a neurology principle so as to ensure that different types of environments can accurately perform fire early warning in real time and realize early warning and intelligent control of fire hidden dangers of the batteries.

Preferably, the vehicular fire safety system further comprises a 4G communication module and a GPS positioning module, the 4G communication module is used for realizing data communication between the fire safety system and the internet, the data processing module uploads fire early warning information to a cloud server through the 4G communication module for a big data platform to perform fire early warning analysis, and a user or a fireman realizes rapid positioning of a fire pre-occurrence place according to the GPS positioning module.

Referring to fig. 3, 4, 5 and 6, the fire extinguishing tube is further described with reference to an embodiment, the fire extinguishing tube includes a polyurethane tube 1, a switch valve 2 is disposed at one end of the polyurethane tube 1, an electronic control connecting line 21 connected to a detection controller is disposed on the switch valve 2, the electronic control connecting line 21 is connected to a striker device 22, a spring 23 is disposed at the bottom of the striker device 22, the bottom of the spring 23 is connected to a striker 24, a sealing diaphragm 25 and a pressing ring 26 are disposed at the lower end of the striker 24, the switch valve 2 includes an outlet port 27, a fire extinguishing medium outlet 28 is disposed on the outlet port 27, the outlet port 27 is connected to a fire extinguishing medium outlet chamber 201, the sealing diaphragm 25 and the pressing ring are fixed at the lower side of the inside of the switch valve 2 by a pressing bolt 29, the lower side of the switch valve is a hollow structure, a one-way sealing valve 3 is disposed at the other end of the polyurethane tube 1, the polyurethane pipe body 1 is filled with fire extinguishing medium through a one-way sealing valve 3.

Specifically, the pressing ring 26 is a fixed gasket, the sealing membrane 25 is fixed between the fixed gaskets, the fixed gasket is fixed below the pressing bolt 29, a pre-striking pin hole is formed in the center of the fixed gasket, and the diameter of the pre-striking pin hole is larger than the outer diameter of the striking pin 24.

Specifically, the center of the hold-down bolt 29 is a hollow structure, and the center of the hold-down bolt 29 is a striker hole 291; the striker hole 291 has a diameter larger than the outer diameter of the striker 24.

Specifically, the lower sides of the sealing diaphragm 25 and the pressing ring 26 are provided with connecting pieces 202, the outside of each connecting piece 202 is connected with the polyurethane tube body 1, the polyurethane tube body 1 is further provided with a pressing piece 203, a port of the polyurethane tube body 1 is arranged between the connecting piece 202 and the pressing piece 203, the pressing piece 203 is fixedly connected with the bottom of the switch valve 2, the polyurethane tube body 1 is hermetically connected with the switch valve 2, and the connecting piece 202 is of a hollow structure and is provided with a fire extinguishing medium channel.

Specifically, the one-way sealing valve 3 includes a second connecting member 31, a valve core 32 is disposed on the second connecting member 31, the exterior of the second connecting member 31 is connected to the polyurethane tube 1, a second buckling member 33 is further disposed outside the polyurethane tube 1, the second buckling member 33 is fixed to the one-way sealing valve 3, and the one-way sealing valve 3 is hermetically connected to the polyurethane tube 1.

In order to enable the firing pin to effectively break the sealing membrane to release the fire extinguishing medium, a pre-firing pin hole is formed in the center of the fixing gasket, the diameter of the pre-firing pin hole is larger than the outer diameter of the firing pin, the center of the compression bolt is of a hollow structure, and a firing pin hole 291 is formed in the center of the compression bolt; the striker hole diameter is greater than the outer diameter of the striker.

In order to reset the striker after impact and not obstruct the release of the fire extinguishing medium, the striker is connected with a spring, the spring is arranged in a spring reset cavity at the upper part of the switch valve, and the spring pushes the striker to be compressed and reset after being detonated by a striker device so as to reset the striker to the original position.

In this embodiment, the fire extinguishing medium is heptafluoropropane, and this heptafluoropropane is a clean gaseous chemical fire extinguishing agent who mainly has the physics to put out a fire with chemical fire extinguishing, has colourless, tasteless, low toxicity, nonconducting, pollution-free characteristics, also liquefies the storage at normal atmospheric temperature, does not have the destructive action to the atmospheric ozone layer, perfluorohexanone is a limpid, colourless, tasteless liquid, mainly relies on the heat absorption to reach the effect of putting out a fire, and lithium ion battery conflagration has the relighting nature, and cooling is effective means after the conflagration forms, and this heptafluoropropane has excellent environmental protection performance, is green fire extinguishing agent.

Preferably, the fire extinguishing pipe is internally provided with a pressure sensor which is electrically connected with the data processing module, the data processing module displays pressure data in the fire extinguishing pipe through the panel module, so that a user can check the working state of the fire extinguishing pipe, the fire extinguishing pipe can be replaced in time when the service life is long, the pipe body is aged, and the pressure is lower than a normal value, and when the pressure is rapidly increased, the fire extinguishing pipe can be used as a fire early warning signal to alarm so as to ensure the stable operation of the vehicular fire safety system.

The utility model provides an automobile-used fire safety coefficient, arrange detection control module and fire extinguishing module through the fixed point, realize that point-to-point conflagration high provenance is put out a fire, and simultaneously, material characteristic based on the polyamide body, this fire extinguishing pipe is equal stable work under-40 ℃ -70 ℃ of environment, when acquisition control module's control became invalid, the conflagration emergence point is at the in-process that the temperature rised rapidly, make the pressure increase in the fire extinguishing pipe, when the temperature reaches 110 ℃, the fire extinguishing pipe breaks, the diameter of breaking is 10 ~ 15mm, liquid fire extinguishing agent vaporizes into the gaseous state under high temperature, intraductal pressure can rise, with 2.9Mpa pressure release, high fire extinguishing efficiency, high reliability, and simultaneously, this fire safety coefficient maintains the characteristics with low costs, and be applicable to all types's big or small vehicle, the commonality is strong.

In conclusion, after the ordinary skilled in the art reads the document of the present invention, according to the present invention, the technical solution and technical concept of the present invention do not need creative mental labor to make other various corresponding transformation schemes, which all belong to the protection scope of the present invention.

Claims (10)

1. A fire-fighting safety system for vehicles is characterized by comprising a power supply, a panel module, a data processing module, a detection control module and a fire extinguishing module which are sequentially and electrically connected through a CAN bus, wherein,

the fire extinguishing module comprises a preset number of fire extinguishing pipes, the fire extinguishing pipes are respectively arranged at preset positions of a vehicle body, each fire extinguishing pipe comprises a polyamide pipe body, a switch valve and a one-way sealing valve, the switch valves and the one-way sealing valves are respectively arranged at two ends of the polyamide pipe body, fire extinguishing media are filled into the polyamide pipe body through the one-way sealing valves outside the polyamide pipe body, and when the detection control module detects that fire occurs at the preset positions of the vehicle body, the detection control module controls the switch valves to be opened, so that the fire extinguishing media are actively released to perform fire extinguishing action, or the polyamide pipe body is burned by open fire to be locally burst, so that the fire extinguishing media are passively released to perform fire extinguishing action;

the detection control module comprises a preset number of detection controllers which correspond to the fire extinguishing pipes one by one, the detection controllers are respectively connected with the switch valves of the fire extinguishing pipes one by one and are installed at preset positions of a vehicle body, and the detection controllers are used for detecting fire early warning information of the preset positions, uploading the fire early warning information to the data processing module and controlling the switch valves to be opened actively; the data processing module is used for receiving the fire early warning information sent by the detection control module, collecting and processing the fire early warning information to form a fire early warning signal and sending the fire early warning signal to the panel module;

the panel module is used for a user to check fire early warning information of each preset part of the vehicle body.

2. A fire safety system for vehicle as claimed in claim 1, wherein the detection controller comprises a temperature sensor, a smoke concentration sensor and a carbon monoxide concentration sensor, when the detection controller detects that the temperature, smoke concentration or carbon monoxide concentration of the predetermined portion exceeds a first preset value, the data processing module sends a fire warning signal to the user through the panel module, and when the detection controller detects that the temperature, smoke concentration or carbon monoxide concentration of the predetermined portion exceeds a second preset value, the control switch valve is opened, thereby actively releasing the fire extinguishing medium to perform fire extinguishing/cooling action.

3. The vehicular fire safety system according to claim 1, further comprising a 4G communication module and a GPS positioning module, wherein the 4G communication module is used for realizing data communication between the fire safety system and the internet, the data processing module uploads fire early warning information to a cloud server through the 4G communication module for a fire early warning analysis by a big data platform, and a user or a fireman realizes rapid positioning of a fire pre-occurrence place according to the GPS positioning module.

4. A fire safety system for a vehicle as claimed in claim 1, further comprising an emergency start button electrically connected to the data processing module and sending an emergency control signal to the detection control module via the data processing module, wherein the detection control module controls the fire extinguishing module to perform an active fire extinguishing operation according to the emergency control signal.

5. A fire safety system for a vehicle according to claim 1, wherein the switch valve is provided with an electric control connecting wire connected with the detection controller, the electric control connecting wire is connected with a firing pin device, a spring is arranged at the bottom of the firing pin device, the bottom of the spring is connected with the firing pin, a sealing diaphragm and a pressing ring are arranged at the lower end of the firing pin, the switch valve comprises an outlet port, a fire extinguishing medium outlet is arranged on the outlet port, the outlet port is connected with a fire extinguishing medium outlet cavity, the sealing diaphragm and the pressing ring are fixed on the lower side inside the switch valve through a pressing bolt, and the lower side of the switch valve is of a hollow structure.

6. A fire safety system for a vehicle as claimed in claim 5, wherein the pressure ring is a fixed shim.

7. A fire safety system for a vehicle as claimed in claim 6, wherein the sealing diaphragm is secured between fixing washers secured under the hold down bolts.

8. A fire safety system for a vehicle as claimed in claim 5, wherein the hold-down bolt is hollowed out at the centre of the hold-down bolt, and the hold-down bolt is provided with a striker hole at the centre of the hold-down bolt.

9. A fire safety system for a vehicle as recited in claim 8, wherein the striker hole has a diameter greater than an outer diameter of the striker.

10. A fire safety system for a vehicle as claimed in claim 1, wherein the fire extinguishing medium is hexafluoropropane or heptafluoropropane or perfluorohexanone.

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