226results about How to "Prevent re-ignition" patented technology

A fire suppressant system having a pipe system, spray nozzles connected to the pipe system and a control system for selectively charging the pipe system with foam. The control system includes a pilot line for generating a signal based upon sensing an environmental parameter and a first control valve for activating the system based upon the signal. Preferably, the first control valve forms i) an interior cavity for mixing the compressed air and compressed air liquid, ii) an outlet in fluid communication with the interior; iii) a first inlet, oriented substantially perpendicular to a flow through the outlet, in fluid communication with the interior and the compressed air; and iv) a second inlet, oriented substantially perpendicular to the flow, in fluid communication with the interior and the compressed air liquid.

A fire suppressant system having a pipe system, spray nozzles connected to the pipe system and a control system for selectively charging the pipe system with foam. The control system includes a pilot line for generating a signal based upon sensing an environmental parameter and a first control valve for activating the system based upon the signal. Preferably, the first control valve forms i) an interior cavity for mixing the compressed air and compressed air liquid, ii) an outlet in fluid communication with the interior; iii) a first inlet, oriented substantially perpendicular to a flow through the outlet, in fluid communication with the interior and the compressed air; and iv) a second inlet, oriented substantially perpendicular to the flow, in fluid communication with the interior and the compressed air liquid.

This invention relates to a formulation material and its method useful in forestry firefighting, the formulation material comprising: (a) an anhydride copolymer having a structural formula wherein a functional group X of said formula is at least one alkyl group selected from the family consisting of methyl, ethyl, and propyl groups! and (b) at least 0.1%, by weight, of at least one cross-linking agent for said anhydride copolymer, said agent selected from the group of cross-linking agents consisting of a biopolymer and a tannin, wherein a weight ratio of said anhydride copolymer to said cross-linking agent is at least 2:1, and wherein a total weight of said anhydride copolymer and said cross-linking agent, within the formulation, is at least 25% on an anhydrous basis.

The invention discloses a modular multilevel converter with a direct-current fault isolation function and a modular multilevel converter (MMC) submodule. The twin-submodule in series consists of a first to a fifth IGBT (insulated gate bipolar transistor) T1 to T5, a first to a sixth diodes D1 to D6, a first capacitor C1 and a second capacitor C2; the twin-submodule in series includes two operation modes: a normal operation mode and a blocked mode, under the blocked mode, all controllable switches, i.e. the first to the fifth IGBT T1 to T5 are completely switched off, and then the capacitance voltage of the submodule is accessed to a current circulating path in a reverse polarity manner. When a direct-current fault occurs, the submodule enters the blocked mode, and the capacitance voltage is accessed in the reverse polarity manner, so that the elimination of fault current and the fault isolation can be realized. A plurality of twin-modules in series are connected in series to form a bridge arm of the modular multilevel current converter, six bridge arms with the same topology form a three phase full bridge structure and from a modular multilevel current converter structure. The fault isolation speed and the fault recrudescence preventing capacity can be greatly improved, and the investment cost and switch loss are greatly reduced.

A method and device for suppression of fires related to heating appliances, vent hoods and work benches through deployment of very fine mist droplets, preferably less 100 micron diameter, into the firebase. A low momentum, high mist loading fine mist stream is introduced about the firebase. Mist is discharged to the firebase through diffusers or swirl channels so that the mist surrounding the firebase will be entrained into the firebase to secure and suppress the fire. After the fire is suppressed, the fine mist is further discharged to the hot oil surface for cooling.

The invention discloses an anti-reburning environment-friendly power transmission line forest fire extinguishing agent. The anti-reburning environment-friendly power transmission line forest fire extinguishing agent comprises the following components in parts by weight: 5-20 parts of ammonium carbonate, 10-45 parts of ammonium polyphosphate, 10-30 parts of sodium silicate, 1-10 parts of a foaming agent, 0.5-5 parts of polyethylene glycol, 1-5 parts of a thickening agent, 4-10 parts of a composite anti-freezing agent and 55-80 parts of water, wherein the foaming agent is selected from one of alkylethoxylate carboxylate, an imidazoline amphoteric surfactant and a biological surfactant; the composite anti-freezing agent is a compound which is prepared by compounding inorganic salt and polyhydric alcohol according to a mole ratio of (1 to 3)-(1 to 9). All the raw materials of the anti-reburning environment-friendly power transmission line forest fire extinguishing agent are environment-friendly materials, so that the fire extinguishing agent is free of fluorine compound, toxicity, smell and pollution; a fire retardant is added into the fire extinguishing agent, so that the fire extinguishing agent is capable of effectively preventing the fire from spreading and is high in fire extinguishing efficiency; the environment-friendly surfactant serves as the foaming agent, so that the fire extinguishing agent is high in foaming performance and is capable of effectively isolating contact between the combustion material and the air and accelerating the fire extinguishing speed; the anti-freezing agent is compounded by the inorganic salt and polyhydric alcohol, so that the freezing point of the fire extinguishing agent is reduced to be -30 DEG C.

The invention discloses a system and method method for drying and carbonizing a biomass raw material by using boiler flue gas. The invention relates to two processes of biomass drying as well as biomass carbonization and carbonization product utilization. In the process of biomass drying, the waste heat of rear flue gas of a boiler dust remover is used for drying the biomass raw material, so that the influence of the water content of the biomass raw material on a boiler system is avoided. In the process of biomass carbonization and carbonization product utilization, the heat of the flue gas at a boiler coal economizer is used for carrying out low-temperature pyrolysis carbonization treatment on the dried biomass so as to obtain biomass charcoals and a combustible pyrolysis gas with high heat values, high energy density and good hydrophobicity. By adopting the system and the method, the process of biomass drying and the process of carbonization are reasonably separated, the waste heat of the boiler flue gas is fully used, and the continuity of biomass drying and carbonization production is realized, so that the system and the method have the characteristics of wide raw material adaptability, high drying and carbonization efficiencies, stable carbonization product quality, convenience in operation, capability of scaling up easily and the like.

A solid propellant fire extinguisher or a hybrid fire extinguisher is incorporated into a vehicle fire suppression system. The system is activated according to at least one condition selected from the group consisting of acceleration, deceleration, speed, time, temperature, fuel, fuel level, fire, smoke, light transmittance and optical signature.

A method and device for suppression of fires related to heating appliances, vent hoods and work benches through deployment of very fine mist droplets, preferably less 100 micron diameter, into the firebase. A low momentum, high mist loading fine mist stream is introduced about the firebase. Mist is discharged to the firebase through diffusers or swirl channels so that the mist surrounding the firebase will be entrained into the firebase to secure and suppress the fire. After the fire is suppressed, the fine mist is further discharged to the hot oil surface for cooling.

The invention discloses an unmanned mechanical garage movable type fire fighting system and method. The system comprises a garage. The garage is provided with a plurality of parking positions, three stacking machine and a fire fighting water system. A temperature sensing detector and a smoke sensing detector are arranged on the top of each parking position. Among the parking positions, two are fire fighting emergency parking positions, and a fire fighting foam monitor is arranged in one fire fighting emergency parking position. Among the two stacking machines of the garage, one is a small specially-manufactured stacking machine which shares a track with the two stacking machines, and the small specially-manufactured stacking machine is provided with a movable automatic fire hydrant. The body of the fire fighting foam monitor is provided with an infrared thermal imaging detector, a horizontal detecting locator and a vertical detecting locator. A negative pressure type proportional mixeris installed on the top of a foam liquid storing tank and connected to a fire hydrant system through a fire fighting water belt. The system has the beneficial effects that the stacking machines serveas carriers of a fire fighting device, fixed-point spraying is carried out close to the fire extinguishing position, starting is fast, moving is flexible, and locating is accurate.

The invention relates to a program-controlled injection strategy used for fire suppression of an electrochemical energy storage system. A composite sensing fire monitoring module and a fire extinguishing system are mounted in a battery prefabricated cabin, the fire extinguishing system is connected with a fire alarm controller, and a distribution valve is mounted at the top of each battery module; when the composite sensing fire monitoring module sends out an alarm signal, the composite sensing fire monitoring module can rapidly acquire failures and failure positions of batteries; and the fire alarm controller is linked, the corresponding distribution valves are opened, the fire extinguishing system is quickly started, the fire position where the battery thermal runaway occurs is quickly extinguished and continuously cooled, and the batteries are prevented from reburning. According to the program-controlled injection strategy, a grading early warning mechanism is combined with a perfluorohexanone fire extinguishing agent to cooperate with the program-controlled injection strategy to achieve the fire extinguishing system, the lithium battery fire can be effectively suppressed, the characteristics of accurate positioning, efficient fire extinguishing, continuous cooling and environment friendliness are achieved, and electrical equipment is protected and explosion is controlled to the maximum extent through the grading linkage control signal strategy.

An apparatus for extinguishing fires in stoves used in food preparation. This invention detects a grease fire on the stovetop by detecting an elevated temperature associated with a grease fire and releases a fire suppression agent into the burning pan. A trigger mechanism retracts a restraining pin releasing the lever and cover A packet of dry fire suppression agent with a foil separator falls using gravity. The foil separator is folded in a manner that divides the fire suppression agent into smaller portions.

The invention discloses an automatic forest fire extinguishing method, and relates to the technical field of forest fire fighting. The method solves the technical problems that a fire head is difficult to extinguish and the safety of firefighters is prone to be threatened by using an existing fire extinguishing method. According to the method, a forest fire is monitored in real time and fed back to a command center in real time, the command center dispatches an unmanned aerial vehicle group to leave for extinguishing the fire, the fire head of a fire scene is extinguished at the first time after the unmanned aerial vehicle group arrives at the fire scene, and then the command center increases the dispatch of fire-extinguishing rescue according to the condition of the fire scene. The invention further discloses an automatic forest fire extinguishing device, automatic forest fire extinguishing equipment and a storage medium. According to the automatic forest fire extinguishing method, device and equipment as well as the storage medium, the forest fire can be effectively extinguished in time and extinguished the fire in the bud, life threats caused by the fact that the firefighters participate in the fire scene to extinguish the fire are avoided, the fire extinguishing safety is guaranteed, and the fire extinguishing efficiency is improved.

The invention discloses a bentonite reticular gel foam mud fire prevention and extinguishing agent, and the key point of the technical scheme is that the fire prevention and extinguishing agent is composed of a bentonite composite type flame-retardant foaming agent, an attapulgite clay powder with an air purifying function, inorganic fiber spraying cotton, a sodium-modified bentonite powder, a coal gangue powder, an expanded perlite powder, sodium alginate and water. The ingredients of the bentonite reticular gel foam mud fire prevention and extinguishing agent are inputted into a plow harrow type material mixing machine and are subjected to high speed mixing into the bentonite reticular gel foam mud fire prevention and extinguishing agent. Reticular gel foam mud is jetted to a burning coal layer by an inorganic fiber spraying machine, so as to be beneficial for generation of an integral reticular gel foam mud film in the fire prevention and extinguishing process, the integral reticular gel foam mud film covers and adheres to the surface of the ore layer all the time, contact of the burning coal layer with air is rapidly isolated, coal mines are prevented from continuing to burn, the coal layer is avoided from reburning, and the purposes of flame retardancy and fire prevention and extinguishing are reached; and the bentonite reticular gel foam mud fire prevention and extinguishing agent is applicable to coal mines, mine operating areas and forest fire prevention and extinguishing.

The invention discloses temperature-sensitive hydrogel and a preparation method thereof, and belongs to the technical field of hydrogel. The preparation method of the hydrogel comprises the followingsteps: (1) preparing reaction solution by using methyl cellulose and deionized water; (2) by using the reaction solution as a solvent, respectively preparing NaHCO3 solution and NaOH solution, and then mixing the NaHCO3 solution and the NaOH solution to carry out acid-base titration on a certain amount of acrylic acid, thus obtaining sodium-acrylate monomeric correction liquid with a PH value being 7.0; (3) adding N-isopropylacrylamide into a four-port bottle according to a certain proportion, and slowly dripping a certain amount of the sodium-acrylate monomeric correction liquid into the four-port bottle under the condition of nitrogen protection, thus obtaining dissolving liquid; (4) adding a crosslinking agnet, an initiator and a catalyst into the dissolving liquid to prepare the temperature-sensitive hydrogel. The temperature-sensitive hydrogel disclosed by the invention has good fire-extinguishing performance.

The invention provides an aqueous foaming Newtonian concentrate, an expanded foam composition and a process of forming a foam composition concentrate. The aqueous foaming concentrate includes a carbonized saccharide mixture, a surfactant, water and optionally further agents including cross-linking agents, thickeners, solvents, stabilizers, buffers, corrosion inhibitors and preservatives. Foaming concentrates of the present invention are free of fluorine and persistent organic pollutants and particularly suited for use in fire prevention, suppression and extinguishment, vapor suppression and wetting of surfaces at concentrations less than 1.3% by weight.

The invention relates to an equipment part of a foam fire-fighting system, in particular to a gas-liquid proportioning mixed foam maker of a compressed gas foam fire-fighting system. The gas-liquid proportioning mixed foam maker of the compressed gas foam fire-fighting system comprises a shell and a mixed foaming chamber, wherein the mixed foaming chamber fully occupies the middle inside the shell; the input end of the mixed foaming chamber is communicated with a foam liquid inlet pipe and a gas chamber; the gas chamber is communicated with a compressed gas inlet pipe; the output end of the mixed foaming chamber is communicated with an output chamber; and an auxiliary mixed foaming medium is arranged in the mixed foaming chamber. In the gas-liquid proportioning mixed foam maker disclosed by the invention, the mixed foaming chamber is additionally arranged, and the auxiliary mixed foaming medium is arranged in the mixed foaming chamber, therefore, foaming multiples are increased, foaming efficiency reaches 100 percent and high utilization ratio of water and foam liquid and a good fire-fighting effect are achieved; output fire-fighting foams can be adhered to protected objects and have long drainage time and burn resistant time, and therefore, after-combustion is effectively prevented; and the output fire-fighting foams have light weight so that a water hose filled with the fire-fighting foams is very light, and the water hose can be moved to a very high position and easily and forcedly deliver the fire-fighting foams to a height more than 200 meters.

The invention discloses a flame-retarding fire extinguishing agent for coal mines, which is prepared from distilled water, 0.5 to 5 percent of propylene glycol, 67.5 to 76 percent of high-hydroscopicity resin, 5 to 9 percent of potassium ferricyanide, 6 to 11 percent of tripolycyanamide and 8 to 12 percent of potassium bicarbonate, wherein the pH value of the flame-retarding fire extinguishing agent is regulated to 6 to 8.5 by oxalic acid or acetic acid. After vacuum dehydration, the flame-retarding fire extinguishing agent for coal mines, which is in form of water absorbing gel, is obtained.The flame-retarding fire extinguishing agent is used by mixing with water according to a ratio of 1:(1,000-10,000). The gel like product formed by water absorbing gel containing the high-hydroscopicity resin and absorbed water has high water retaining performance under a high-temperature condition and has a very high heat capacity. The flame-retarding fire extinguishing agent can form a stable gel layer on the surface of an object so as to insulate a fire source from the air, prevent fire from spreading and consequently extinguish the fire. Compared with common water, the flame-retarding fireextinguishing agent has a lower flowing rate and a high viscosity; and the flame-retarding fire extinguishing agent not only can reduce the temperature of the surface of coal and but also can permeate into the inside of the coal to cool the coal and to prevent the coal from burning again, so that the fire extinguishing effect is enhanced.

The invention belongs to the field of new emergency security materials, particularly relates to a water-based aerogel efficient fire extinguishing agent, and further discloses a preparation method thereof, According to the water-based aerogel efficient fire extinguishing agent, the inorganic aerogel powder, the template agent, the phosphorus-containing flame retardant, the nitrogen-containing flame retardant and the hydrophilic colloid stabilizer are used as raw materials, wherein the efficiency of the fire extinguishing agent is greatly improved by utilizing the ultralow heat conductivity coefficient and ultrahigh adsorption capacity of the inorganic nano porous aerogel; meanwhile, the phosphorus-containing flame retardant and the nitrogen-containing flame retardant are combined to serveas related functional components of the fire extinguishing agent, and the colloid stabilizer and the ion buffer agent are added into the water-based flame retardant, so that the uniformity and the expiration date of the flame retardant are increased, and the fire extinguishing agent has an efficient fire extinguishing function, a good fireproof function and a good flame retardant function; in addition, the fire extinguishing agent also has longer quality-guaranteeing storage life, and the fire extinguishing variety, efficiency and application range are effectively expanded.

The invention discloses a non-pressure storage type automatic fire extinguishing system. The non-pressure storage type automatic fire extinguishing system comprises a tank body, a piston, a reagent, a gas generator, a controller, a vehicle-mounted management system and a fire extinguishing pipeline. An upper end cover is mounted on an end portion of the tank body while a lower end cover is mounted on the other end portion; a piston is movably arranged in the tank body; a cover plate is mounted in the tank body between the piston and the lower end cover, and a through hole is formed in the plate body of the cover plate; the gas generator is mounted in a cavity between the cover plate and the lower end cover; the reagent is accommodated in the tank body between the piston and the upper end cover; the gas generator is connected to the controller; the controller is separately connected to an alarm and the vehicle-mounted management system; and one end of the fire extinguishing pipeline hermetically penetrates through the upper end cover and communicates with the inner part of the tank body. The invention also discloses a fire extinguishing method of the non-pressure storage type automatic fire extinguishing system. The non-pressure storage type automatic fire extinguishing system disclosed by the invention is good in sealing property, convenient to match and mount, free of an external gas source to push and safer and more reliable.

The invention discloses a firefighting compartment for mixing water and sand. The firefighting compartment comprises a compartment body (1), a water tank (2), a high-pressure pump (8), a high-pressurewater pipe (7) and a high-pressure water gun head (6), wherein the water tank (2) is located at the front side of the compartment body (1); the high-pressure water pipe (7) is connected with the high-pressure pump (8); and the high-pressure water gun head (6) is connected with the outer end of the high-pressure water pipe (7). The firefighting compartment further comprises a sand box (3), a stirring machine (10) and a caching box (5), wherein the stirring machine (10) is located behind the water tank (2) and provided with a water and sand feeding opening; and the sand box (3) is located abovethe water and sand feeding opening, and the lower end of the sand box (3) is provided with a sand box funnel controlled by an electromagnetic switch. The water tank (2) is provided with a water pipeleading to the water and sand feeding opening. The rear side of the stirring machine (10) is connected with the caching box (5) through a pipe. The caching box (5) is connected with the high-pressurewater pipe (7) through the high-pressure pump (8). By means of the firefighting compartment, after being mixed, the water and the sand can be sprayed out for fire extinguishment; reburning is effectively prevented; and fire extinguishment is conducted rapidly and efficiently.

The invention relates to a fire fighting system using superfine dry powder as an extinguishing agent. The fire fighting system comprises two parts, i.e., a delivery subsystem and a control subsystem, wherein parts of the control subsystem are connected with the delivery subsystem through a pipe network of the delivery subsystem; the delivery subsystem comprises an air compressor, a high-pressure gas cylinder, a safety valve, a check valve, the pipe network, a dry powder extinguishing agent spray nozzle and novel superfine monoammonium phosphate extinguishing power; and the control subsystem comprises a detector, an electric valve, an alarm and a fire fighting control center. A using method of the fire fighting system using the superfine dry powder as the extinguishing agent comprises seven major steps. The fire fighting system disclosed by the invention can be widely used for the extinguishment of the pipe network of a large-scale closed building and has an extensive application prospect and practical significance in the technical field of public security fire fighting.

The invention discloses a novel coal ash grouting material, which is composed of specific components by mass: 1 part of coal ash, 2 parts of water, liquid water glass occupying 5% to 10% of the coal ash and sepiolite occupying 2%. to 5%.of the coal ash. Improved coal ash grout has strong adhesion performance on firing articles, can evenly and effectively cover the surfaces of the firing articles, is strong in water-retaining performance and good in fire resistance, can effectively block leakage insulate oxygen to prevent grout from losing, and is low in price, environmental-friendly, good in stability and suitable for pipeline transportation.

The invention discloses a cooling and fire-fighting hybrid system for energy storage devices. The system comprises a box body, a plurality of energy storage devices are arranged in the box body, and cooling passages are arranged on the energy storage devices; a cooling circulation loop comprises a plurality of cooling branches communicated with the cooling passages, and is sequentially connected with a compressor, a condenser, a liquid storage tank, a throttle valve and a first switch valve used for controlling the on-off of the cooling circulation loop, and a flame-retardant refrigerant is stored in the liquid storage tank. The box body is internally provided with at least one spraying branch, the spraying branch is arranged above the energy storage devices and is communicated with the cooling circulation loop, and the spraying branch is provided with a plurality of spray heads and a second switch valve used for controlling the on-off of the spraying branch. The cooling and fire-fighting hybrid system further comprises a first fire extinguishing branch communicated with the cooling circulation loop, the other end of the first fire extinguishing branch is connected with a fire extinguishing agent tank, the first fire extinguishing branch is provided with a third switch valve used for controlling the on-off of the first fire extinguishing branch, and a temperature sensor is arranged in the box body.

The invention provides a battery box with a fire-fighting structure and an energy-storage battery cabinet. The battery box comprises a box body provided with an air inlet structure communicating withthe interior of the box body, an air outlet mechanism arranged on the box body and communicating with the interior of the box body, a fire-fighting pipeline communicating with the interior of the boxbody and close to the air outlet mechanism, wherein the air inlet structure and the air outlet mechanism are arranged on the two sides of the box body respectively. According to the battery box, the air inlet structure and the air outlet mechanism are arranged on the box body, so that on one hand, air in the box body can flow to cool the interior of the box body and ensure the temperature during operation of a battery, and on the other hand, a gaseous extinguishing agent can be introduced during battery burning to effectively extinguish open fire; a liquid extinguishing agent is introduced into the box body through the fire-fighting pipeline after the open fire is extinguished; the liquid extinguishing agent can be stored in an inner space of the box body; and the battery re-burning can beprevented under the soaking of the liquid extinguishing agent.

The invention belongs to the field of garbage cans, and particularly relates to a safe flame-retardant garbage can. The safe flame-retardant garbage can comprises a can body and a cover body, an annular cavity is formed in the side wall of the can body, a piston ring is slidably connected in the annular cavity in a sealing mode, an evaporation liquor fills a sealing space formed by the piston ringand the lower portion of the annular cavity, connecting pipes are fixedly connected to the four corners of the lower end of the cover body, the lower ends of the connecting pipes are fixedly connected with the upper end of the can body, the lower ends of the connecting pipes communicate with the annular cavity, a containing groove is formed in the lower surface of the cover body, a sealing movable plate matched with the can body is arranged in the containing groove, corrugated stretchable pipes are fixedly connected to the four corners of the upper end of the sealing movable plate, the four corrugated stretchable pipes are in one-to-one correspondence with the four connecting pipes correspondingly, channels for allowing the corrugated stretchable pipes and the connecting pipes to communicate are arranged in the cover body, two openings are formed in the sealing movable plate, and a one-way valve and a manual valve are installed in the two openings correspondingly. According to the safe flame-retardant garbage can, when the garbage can is combusted, an outlet can be automatically blocked for fire extinguishing.

The invention discloses a vehicle extinguishing system which comprises an extinguishant storage and drive bottle set, a conveying pipeline and a plurality of local pressure storage bottles. The conveying pipeline comprises a conveying main pipe and a plurality of conveying branched pipes separately provided with one-way valves. All the conveying branched pipes are in parallel connection with the conveying main pipe. The inlet end of the conveying main pipe is connected with the extinguishant storage and drive bottle set. The outlet ends of all the conveying branched pipes are connected with the inlet ends of the local pressure storage bottles, and the outlet ends of the local pressure storage bottles are connected with starting buttons and atomizing spray heads. According to the vehicle extinguishing system, through the method that the extinguishant storage and drive bottle set is combined with the local pressure storage bottles, when a local fire occurs, the local pressure storage bottles are manually opened to put out the local fire, and when a fire is severe, the extinguishant system is fully started to rapidly control fire deterioration, the purposes of local extinguishing and overall extinguishing are simultaneously achieved, and the adaptability is high. The vehicle extinguishing system is reasonable in structural arrangement, small in occupied space, easy to mount and wide in application prospect.

The invention discloses an intelligent kitchen equipment fire extinguishing system. The intelligent kitchen equipment fire extinguishing system comprises tensioning devices, a fire extinguishing mechanism, a water supply mechanism and spray nozzles. In this way, by the adoption of the intelligent kitchen equipment fire extinguishing system, when fires happen on a kitchen cooking bench and an exhaust flue of the kitchen cooking bench, and the temperature of the heat generated by flames is equal to the fusing temperature of temperature sensors, the temperature sensors are disconnected, the tensioning devices are loosened, a tail end signal sensor is triggered to output a fire signal to a controller, the controller opens fire extinguishing agent bottles, fire extinguishing agents can pass through a fire extinguishing pipeline and arrive at the spray nozzles to be sprayed out, the fires of the cooking bench and a smoke suction hood are extinguished at the same time, the follow-up cold water passes through the fire extinguishing pipeline and arrives at the spray nozzles to conduct cooling, and flame re-combustion is avoided; and when the controller receives a fire extinguishing starting signal, a fuel gas pipeline is closed, the fire signal is transmitted to a fire protection control center, an alarm is given, and the enlargement of the fire behavior and even the explosion are avoided. Fire extinguishment is timely and accurate, the loss is reduced, and the number of casualties is reduced.