351 results about "Flame spread" patented technology

A wildfire defense spraying system installed on property with combustible property surfaces, and adapted for spraying the combustible property surfaces with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying system includes: a storage tank containing a supply of environmentally-clean liquid fire inhibitor comprising an alkali metal salt of a nonpolymeric carboxylic acid, and triethyl citrate (TEC) dissolved in water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible surfaces. An electric-powered hydraulic pump system is connected to a remote power control switch employed to supply electrical power to the electric-powered hydraulic pump system. A plurality of spray heads are mounted about the property and any buildings thereon, and arranged in fluid communication with the storage tank and the hydraulic pump system. During operation, the hydraulic pump system automatically pumps environmentally-clean water-based liquid fire inhibitor from the storage tank and through the spray heads to generate a spray pattern of environmentally-clean water-based liquid fire inhibitor over all the combustible surfaces on the property. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, thin fire-inhibiting alkali metal salt crystalline coatings form on the combustible property surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

A wildfire defense spraying system installed on a property with combustible surfaces and adapted for spraying the property and combustible surfaces with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense system includes: a storage tank containing an environmentally-clean liquid fire inhibitor comprising a majority amount of tripotassium citrate (TPC) and minor amount of triethyl citrate (TEC) dissolved in a major amount of water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible surfaces. A hydraulic pump system is connected to remote power control switch employed to supply electrical power to the hydraulic pump, and remotely activated. A plurality of spray heads is mounted about the property, in fluid communication with the storage tank, and supplied with environmentally-clean water-based liquid fire inhibitor by the hydraulic pump system. During operation, the spray heads spray liquid fire inhibitor from the storage tank forming a spray pattern that covers the property and combustible surfaces to be defended against wildfire embers. When the hydraulic pump system completes pumping and spraying the environmentally-clean water-based liquid fire inhibitor in the storage tank, the hydraulic pump system automatically shuts off, and as water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, thin potassium salt crystalline coatings form on the sprayed combustible property surfaces, inhibiting fire ignition and flame spread in the presence of wildfire.

A wildfire defense spraying process for spraying and protecting property and combustible surfaces with an environmentally-clean water-based liquid fire inhibitor that inhibits fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying process involves maintaining a storage tank containing a supply of environmentally-clean water-based liquid fire inhibitor comprising a major amount of tripotassium citrate (TPC) and minor amount of triethyl citrate (TEC) dissolved in a major amount of water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible property. When a spraying-trigger signal is received by an automated wildfire detection system, a mobile phone or other intelligent source, an electric-powered hydraulic pump system is automatically energized and pumps environmentally-clean water-based liquid fire inhibitor from the storage tank through piping, under pressure, to spray heads mounted about the property, to produce a spray pattern of environmentally-clean water-based liquid fire inhibitor that covers all the property and combustible surfaces to be defended against wildfire. When the hydraulic pump system completes its pumping operations, the hydraulic pump system automatically shuts off. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporates to the environment, thin fire-inhibiting potassium salt crystalline coatings form on the sprayed combustible surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

A wildfire defense system trailer and method of installing an automated sprinkler¬ based wildfire defense system on a wood (home) building construction site before the starting of the construction phase of a home building project in a wildfire urban interface (WUI) region. The first commissioned automated sprinkler-based wildfire defense system will continue in operation all during the home building construction phase, and will only be decommissioned from operation, and removed from the premises, including the job-site wildfire defense system trailer being removed from the property, when construction of the wood building project is totally completed, and the wood building is ready for occupation. At the same time when the first system is decommissioned, a second permanently-installed automated sprinkler-based wildfire defense system will be completely installed within the new building construction, independent from the first system, and ready for commissioning to provide a new proactive measure of defense against a wildfire storm occurring after wood building construction has been completed, thereby protecting all wood and combustible surfaces on the home and surrounding property, and preventing fire ignition and flame spread until the wildfire storm passes through the WUI region. By virtue of the present invention, it is now possible to significantly reduce the risk of wood building construction projects occurring within a wildfire urban interface (WUI) region, and better support the underwriting of building construction and ownership insurance policies within such regions.

The embodiment of the invention relates to the technical field of fire spreading prediction, and particularly discloses a fire spreading trend AI prediction method and system based on a high-rise building. According to the embodiment of the invention, fire alarm information is received; acquiring smoke monitoring data of the target fire building, and performing smoke spreading prediction on the smoke monitoring data; selecting an auxiliary monitoring building; flame monitoring data transmitted by the auxiliary monitoring building are acquired, and flame spreading prediction is carried out; aI prediction of fire hazards and visual display of the fire spreading trend are carried out. Smoke monitoring data of a target fire building can be acquired, auxiliary monitoring analysis is performed, an auxiliary monitoring building is selected, flame monitoring data transmitted by the auxiliary monitoring building is acquired, and AI prediction of fire hazards and visual display of a fire spreading trend are performed by integrating a smoke prediction result and a flame prediction result. The defect of single data acquisition is overcome, and the accuracy of fire spreading trend prediction is effectively ensured in combination with flame monitoring of an auxiliary monitoring building.

The invention discloses an extruded and insulated flame-retardant power cable for on-line monitoring of rail transit, and relates to the technical field of power cables, serpentine springs are connected between two adjacent cavity frames and outside corresponding five conductors on the outer side, an outer plastic pipe is connected between two adjacent serpentine springs, the outer plastic pipe is filled with silicone fireproof adhesive, and the outer plastic pipe is connected with the outer side of the serpentine springs. According to the invention, through the cooperation of the cavity frame, the serpentine spring, the inner plastic pipe and the expanding and supporting strip, the outer side of the conductor is provided with a sufficient heat dissipation circulation gap, the heat dissipation speed of the cable is improved, and the inner parts of the outer plastic pipe and the inner plastic pipe are filled with silicone fireproof glue, so that the heat dissipation performance of the cable is improved. The silicone fireproof adhesive expands when meeting fire to form a compact fireproof layer which tightly wraps the outer side of the conductor, and the expanded fireproof layer can fill heat dissipation gaps among the conductors to prevent flame from spreading, so that the cable has good heat dissipation capability, and meanwhile, the flame retardant property of the cable is also ensured.

The invention discloses a lithium battery thermal runaway heat insulation buffer fire extinguishing protection device which comprises a box body and a box cover capable of being turned over to cover the box body in a sealing mode, a pressure relief opening is formed in the box cover or / and the box body, and a quenching flame arrester is installed in the pressure relief opening in a matched mode; wave energy absorption pieces are installed on the inner wall of the box body and are combined energy absorption pieces in a wave continuous shape or protruding single energy absorption pieces. According to the quenching flame arrester, nearby flames can be timely and effectively quenched, the flames are prevented from disordering and spreading, the fire extinguishing efficiency and the fire extinguishing strength are enhanced, and the quenching flame arrester located at the pressure relief opening or the exhaust opening not only has the flame quenching effect, but also has the pressure dredging or pressure relief effect; the explosion resistance is improved through the double-layer box plate, flame diffusion and explosion pressure dredging are jointly inhibited through the quenching flame arrester and the wave energy absorption piece, explosion impact and high-temperature conduction are resisted through the composite heat insulation buffer layer, the safety of a passenger cabin is guaranteed, and the device is suitable for aviation lithium battery emergency disposal scenes.

The invention discloses a low-smoke flame-retardant environment-friendly low-voltage power cable, and relates to the technical field of power cables, a plurality of thermal expansion flame-retardant strips are adhered to the inner side of a relay isolation sleeve at equal intervals, inner different buffer strips sleeve the inner sides of the plurality of thermal expansion flame-retardant strips, and corrugated metal outer guide sleeves are clamped to the inner sides of the plurality of inner different buffer strips; according to the cable, the problems that in the prior art, due to the fact that effective flame-retardant and heat-resistant components and oxygen and fire insulation components are not arranged in the cable, and a large amount of air is left in the cable, the cable is not prone to damage, and the cable is not prone to damage due to the fact that the cable is not internally provided with the effective flame-retardant and heat-resistant components and oxygen and fire insulation components are effectively solved. And through internal rapid self-extinguishing, the increase of the internal fire condition caused by flame spreading is reduced, the fire extinguishing speed of the cable is improved, and the situation that the overall body is greatly influenced when part of the cable is damaged due to insufficient fireproof and flame-retardant effects is reduced.

A system for forming and maintaining GPS tracked and mapped environmentally-clean chemical-based fire protection zones formed over property and ground surfaces in and about a neighborhood of homes, that proactively inhibit fire ignition and flame spread when exposed to wild fire. The system includes a GPS-tracking anti-fire (AF) liquid spraying system wirelessly connected to a wireless communication network supporting a network database. The GPS-tracked anti-fire liquid spraying system is used to spray particular GPS-specified ground surfaces in and about the neighborhood, with an environmentally-clean anti-fire chemical liquid so to form environmentally-clean chemical fire protection zones over the GPS-specified property surfaces, while generating GPS-coordinate and time / date stamped data records pertaining to the application of the environmentally-clean anti-fire chemical liquid spray during the formation of the environmentally-clean chemical fire protection zones. The GPS-coordinate and time / date stamped data records are transmitted over the wireless communication network for storage in the network database. A mobile computing system is used to access the GPS-coordinate and time / date stamped data records from the network database, relating to the formation of the GPS-specified environmentally-clean chemical fire protection zones, so as to verify that the GPS-specified environmentally-clean chemical fire protection zones were formed at the GPS-specified property surfaces on the particular date, to proactively inhibit fire ignition and flame spread when exposed to wild fire.

The invention belongs to the technical field of high polymer materials, and provides a high-flame-retardance degradable bio-based high polymer material and a preparation method thereof. Based on a degradable bio-based material polylactic acid, a bio-based flame retardant is introduced to realize the efficient flame retardant property of the material, and the preparation method comprises the following steps: firstly, carrying out esterification reaction on L-lactic acid and methacrylic acid under the action of an acid catalyst to obtain methacrylate lactate; and then reacting with 2-(2-ethoxyethoxy) ethanol to generate an ester compound with a long-chain structure and an unsaturated group. Then, a flame retardant containing a phosphaphenanthrene group and an ester compound are subjected to an addition reaction to prepare a bio-based flame retardant with a flame-retardant effect, so that the material has a relatively good carbonization effect and a relatively good capability of inhibiting flame spreading during combustion; polylactic acid, the bio-based flame retardant, the antioxidant, the lubricant, the ultraviolet light absorber and the modified compatilizer are mixed, and finally the biodegradable bio-based high polymer material with excellent flame retardance is obtained.

The invention belongs to the technical field of path planning, and particularly relates to an A * hybrid ant colony path planning method for simulating a flame spreading grid. Comprising the following steps: interactively setting a plurality of fire source positions in an obstacle environment of an initial static grid simulation map, and selecting a starting point; obtaining terrain analysis data and fuel model data of the map; calculating the spreading rate value of each basic grid, and constructing a conversion rule among a non-combustion state, a combustion state and a burnout state to simulate flame spreading; the map information is input into a function formed by nesting a simplified ant colony algorithm into a traditional A * algorithm, and the optimal path for the robot to go to a plurality of target points is planned; simulating the movement of the robot to dynamically present the optimal global path; the flame spreading model and the robot dynamic path planning model are input into a map function together, optimal path planning of the simulation robot in the dynamically changing flame spreading environment is achieved, and the environment and robot moving conditions are displayed in a basic grid map in real time. According to the invention, the optimal path planning for the robot to go to a plurality of target fire sources to implement the fire extinguishing activity under the obstacle and dynamic flame environment can be realized.

The attapulgite (HNTs) is modified by using the diethyl aluminum hypophosphite (ADP), so that the flame retardant property of the HNTs and the compatibility of the HNTs and a polypropylene matrix can be remarkably improved. Through thermal modification, the treated surfaces of the HNTs can effectively adsorb phosphorus elements, and ADP can form phosphate groups on the surfaces of the HNTs to enhance the flame inhibition effect of the HNTs. Due to the adsorption effect, the modified HNTs can form a carbonized layer more quickly at high temperature, flame spreading is prevented, and the flammability of the material in a fire disaster is reduced. The dispersity and compatibility of the modified HNTs in a polypropylene matrix are remarkably improved, the mechanical property and thermal stability of the composite material are enhanced, and the modification cost is effectively reduced by optimizing the modification method. Compared with a traditional high-content inorganic flame retardant, the ADP modified HNTs has the advantages that the flame retardant property is improved, and meanwhile, the requirement for using other expensive flame retardants is reduced, so that the cost of the composite material is effectively reduced.

The invention discloses preparation of isotropic flame-retardant bacterial cellulose aerogel and fire early warning application of the isotropic flame-retardant bacterial cellulose aerogel, and belongs to the technical field of aerogel materials. The preparation method of the aerogel comprises the following steps: (1) adding phosphorus / nitrogen-containing bridged organosiloxane and tetraethyl orthosilicate into bacterial cellulose dispersion liquid in proportion, and then stirring to obtain milk white uniform and stable turbid liquid; and (2) heating and curing the milky white turbid liquid, then precooling, and finally freeze-drying to obtain the isotropic flame-retardant bacterial cellulose aerogel. The aerogel disclosed by the invention is a cellulose-based aerogel material with flame-retardant and heat-insulating properties, has a remarkable isotropic flame-retardant characteristic, can effectively resist flame spread in all directions, is high in carbonization efficiency, can realize early detection and early warning of a fire disaster, and has a great application prospect in the field of fire disaster early warning.

The invention discloses a tunnel fire detection and simulation method and system driven by video data, belongs to the technical field of computer vision and machine learning, and solves the problem that the current tunnel fire target detection algorithm is easy to cause insufficient distinguishing capability of vehicles and flames in a complex multi-target scene environment. The method comprises the following steps: preprocessing an obtained original data set to obtain a target data set to train an improved YOLOv8 neural network model, and carrying out target detection on a to-be-detected tunnel fire scene disaster image to obtain a central coordinate of each preliminary disaster object target for correction; after correction, a monocular vision positioning method is adopted to carry out position calibration and distinguishing on the corrected disaster situation object target, and then real-time scene twinborn modeling is carried out, so that a tunnel fire scene twinborn model is obtained and dynamically updated; and performing flame spread analysis on the tunnel fire scene based on the tunnel fire scene twinborn model, and realizing dynamic updating in un ity. The method is used for tunnel fire detection and simulation driven by video data.

The utility model discloses a windproof butter candle lamp which comprises a base, the upper end of the base is fixedly sleeved with a high-temperature-resistant transparent cover, a cavity for containing a butter candle is formed between the high-temperature-resistant transparent cover and the base, the butter candle is fixedly arranged in the cavity, and a lamp wick is fixedly arranged in the butter candle. The high-temperature-resistant transparent cover comprises a transparent outer layer located outside and a high-temperature-resistant layer fixedly arranged inside the transparent outer layer, and the transparent outer layer and the high-temperature-resistant layer are bonded and fixed through glue. Stable combustion can still be ensured in an outdoor or ventilation environment, and extinguishment is not prone to occurring; the high-temperature-resistant layer in the high-temperature-resistant transparent cover is made of a biaxially oriented polyester material and has excellent flame retardance, the high-temperature-resistant layer is not prone to being ignited or damaged in the burning process of the candle, and flame spreading and cover body burning loss are effectively prevented.

The invention discloses a building fire safety management and control method based on a digital twinborn technology, and the method comprises the steps: constructing sensor-middle platform-model bidirectional mapping, and reconstructing a dynamic scene through employing a neural radiation field technology; fusing the cross-domain desensitization data based on federal transfer learning, and constructing a building total-factor dynamic digital mirror image; through a spectrum analysis algorithm, a fire source is positioned in real time, and a flame spreading track is predicted; performing fire simulation in linkage with a total-factor dynamic digital mirror image, and optimizing a fire-fighting resource scheduling path through a multi-target particle swarm optimization algorithm; a multi-target rescue scheme is generated, an asynchronous block chain is used for evidence storage of a fire-fighting decision instruction, a rescue key area is plotted, and an optimal evacuation route is planned; and converging federal node data to quantify the data contribution degree, reproducing a historical fire behavior and deducing a new scene to carry out iterative optimization. According to the method, the problems of data sensing fragmentation, difficulty in cross-domain fusion, fire prediction lag, underscientific resource scheduling, slow drill scheme iteration and the like in traditional management and control are solved.

The invention discloses a halogen-free flame-retardant fireproof cable material and a preparation method thereof, and relates to the technical field of cable materials, the material comprises the following components: 100 parts of polymer matrix resin, 50-80 parts of a halogen-free flame retardant, 5-15 parts of a magnetic material, 10-20 parts of a bio-based plasticizer, 1-3 parts of an antioxidant, and 1-3 parts of a lubricant. By adding the halogen-free flame retardant and the magnetic material subjected to specific treatment, the flame-retardant and fireproof performance of the cable material is remarkably improved, the additives can effectively absorb heat, inhibit flame spreading and reduce smoke and toxic gas in the combustion process, meanwhile, plasma is used for conducting surface treatment on the magnetic material, and the flame-retardant and fireproof performance of the cable material is improved. The compatibility and the interface bonding force between the magnetic material and other materials are enhanced, so that the flame retardant can be more uniformly dispersed in the cable material, and the flame-retardant effect is further improved.

The invention relates to the technical field of material compositing, and discloses a polyurethane composite insulation board with a good flame retardant effect, which comprises the steps of fireproof surface layer pretreatment, flame retardant core layer preparation, reinforced substrate layer treatment, lamination molding and post-treatment, by designing a unique three-layer composite structure and adopting a multi-component synergistic flame retardant system, the flame retardant effect is good, and the flame retardant effect is good. The heat insulation board can form a multi-stage flame-retardant barrier when encountering high temperature and open fire, the flame spreading speed is slowed down, the overall fireproof safety of the material is improved, and the durability and stability of the flame-retardant effect are enhanced through the synergistic effect of all the functional layers; through surface modification treatment on the functional reinforcing phase, the interface bonding force between the functional reinforcing phase and a polyurethane matrix is improved, so that the flame retardant and the reinforcing phase are uniformly dispersed in the matrix, and the performance defect caused by agglomeration is avoided, thereby enhancing the mechanical strength and structural integrity of the material while keeping excellent thermal insulation performance.

A wildfire defense system trailer for protecting a wood-building job-site from wildfire during the construction phase of a wood-building construction project located within a wildfire urban interface (WUI) region. The wildfire defense system trailer includes: a trailer framework provided with wheels; an adjustable stand mechanism adapted for coupling to a hitch mounted on the rear frame of a truck or tractor provided with an engine and drive train for pulling the trailer to its wood-building construction job-site destination(s); a cabin enclosure mounted on the trailer having a rear hinged door / loading ramp for loading and unloading equipment and supplies stored inside the cabin, and a sheltered interior volume for storing diverse kinds of equipment, and supplies of environmentally-clean water-based liquid wildfire inhibitor that is used for performing different functions, namely: (i) spraying on wood building materials to provide Class-fire protection to wood buildings as they are constructed on the on the wood building construction job-site; (ii) spraying on active fire outbreaks on the wood building construction job-site to extinguish the fire outbreaks; and (iii) spraying over the job-site construction area and wood building(s) being constructed thereon, prior to the occurrence of a wildfire outbreak, to inhibit fire ignition and flame spread. The spray application of said environmentally-clean water-based liquid wildfire inhibitor reduces and / or mitigates damage and / or destruction of property by wildfire.

The invention relates to a cable tunnel bridge fire prediction method and device, electronic equipment and a storage medium. The cable tunnel bridge fire hazard prediction method comprises the following steps: establishing a cable tunnel bridge fire hazard numerical simulation model, establishing a cable tunnel bridge fire hazard simulation model based on FDS software, obtaining key parameters such as heat release rate, temperature distribution and flame spread boundary under different working conditions, and constructing a multi-time sequence sample data set; performing state discretization on continuous variables such as temperature and a spreading range, and estimating a node prior probability in combination with a statistical frequency; constructing a dynamic Bayesian network topological structure according to a causal relationship among a heat source, temperature and spread, and setting a cross-time slice node dependence path to realize time sequence modeling; inputting a training sample and performing parameter learning to generate a conditional probability table; in the prediction stage, multi-step reasoning is achieved through forward propagation, flame spreading range probability distribution and interval estimation of multiple time steps in the future are obtained, and the specific position where the flame arrives is predicted.

The invention discloses an insulated high-voltage-resistant flame-retardant 10kV power cable, and relates to the technical field of power cables, a plurality of heat insulation protection sheets are arranged at the side ends of dense power transmission line cores, an elastic resistance sheath is mounted at the outer side ends of the heat insulation protection sheets, and a plurality of material storage thermosetting cavities are formed in the inner side of the elastic resistance sheath at equal intervals; according to the invention, through internal sealing press fit and oxygen uptake dehydration treatment, stable isolation of the battery cell is realized, the problem of internal short circuit or fire caused by discharging of the battery cell is reduced, and the reliability of the battery cell is improved. And through mutual cooperation of double-layer active flame-retardant fire extinguishing and double-layer passive flame-retardant arranged outside, the time for the cable to become a combustible material during combustion is slowed down, so that the flame spreading speed is slowed down, the fire extinguishing time is prolonged, the direct loss of the cable can be reduced when a fire breaks out, and the flame-retardant and internal insulation flame-retardant protection effects are improved.

The invention discloses a preparation method and application of a cable for a liquid-cooled high-power charging pile, belongs to the technical field of liquid-cooled cables, and aims to solve the technical problem that the flame retardance and fire resistance of a liquid-cooled cable in the prior art need to be further improved. The method comprises the following steps that a plurality of modified heat conduction pipes are spirally arranged on the surface of an insulating layer to obtain a heat exchange layer, the liquid-cooled cable has excellent fire resistance and flame retardance through the collaborative design of composite fiber cloth and the modified heat conduction pipes, glass fibers and a silicon-aluminum structure in the composite fiber cloth are decomposed at the high temperature, and the heat exchange layer is formed; the insulating layer is arranged on the insulating layer, a protective layer is formed, heat transfer and flame spreading are effectively blocked, the structural integrity of the heat conduction pipe is ensured, meanwhile, a cooling liquid circulating system rapidly takes away flame heat, the wire core layer and the insulating layer are further protected, and the secondary combustion phenomenon caused by leakage of organic cooling liquid is avoided.

The invention relates to the technical field of automobile battery fire prevention, and mainly discloses an anti-spontaneous combustion fire-retardant battery which comprises a battery shell, a plurality of battery packs are arranged in the battery shell, a plurality of pressure relief holes are further formed in the battery shell, and fire barriers are further arranged on the pressure relief holes; the flame arrester comprises a plurality of layers of barrier covers, a flame arresting disc is further arranged at the joint of the barrier covers and the pressure relief hole, and a flame arresting seam is formed in the flame arresting disc; wherein the barrier covers are provided with a plurality of flow-through hole layers in the flow measuring direction of the combustion medium, the flow-through hole layers in every two adjacent barrier covers are arranged in a staggered manner, and the flow-through hole layers and the fire-retardant seams are communicated with the inner space and the outer space of the battery shell, and the technology that after thermal failure of the battery, safe pressure relief can be achieved, and flames can be prevented from spreading outwards can be achieved.

The invention discloses a preparation method of an active fire extinguishing microcapsule, and particularly relates to a fire extinguishing technology, the preparation method comprises the following steps: mixing a first monomer, a second monomer and a fluorinated acrylate monomer, adding an initiator, uniformly mixing, heating and polymerizing to obtain a shell material, dissolving the shell material in an organic solvent to obtain a solution, adding an emulsifier and perfluorohexanone at a low temperature, stirring to obtain an emulsion, and drying to obtain the active fire extinguishing microcapsule. Adding a surfactant aqueous solution into the emulsion, continuously stirring after low-temperature high-speed stirring to obtain a three-phase suspension, heating, standing, collecting and drying to obtain an active fire extinguishing microcapsule finished product. According to the preparation method of the active fire extinguishing microcapsule disclosed by the invention, the active fire extinguishing microcapsule has an efficient active fire extinguishing function, and when encountering high temperature, the microcapsule can be broken to quickly release an efficient fire extinguishing core material perfluorohexanone contained in the microcapsule, so that flame spreading is directly inhibited at the initial stage of a fire; the perfluorohexanone is used as an efficient fire extinguishing agent, the usage amount is small, and pollution to the environment is reduced.

Environmentally-clean wildfire inhibitor liquid biochemical solutions produced from an aqueous mixture of alkali metal salt derived from a non-polymerized saturated carboxylic acid such as butyric acid, and dissolved in water along with a dispersing and coalescing agent, realized as an ester of a non-polymerized saturated carboxylic acid, and dissolved in the water to provide a liquid fire inhibitor solution that can be sprayed on combustible surfaces to form thin alkali metal salt crystalline coatings on the combustible surfaces when and as water molecules in the liquid fire inhibitor evaporate to the environment during drying operations, to inhibit fire ignition, flame spread and smoke development.

The invention discloses a heat-conducting high-temperature insulating fireproof ceramic tape and a preparation method and application thereof, and the heat-conducting high-temperature insulating fireproof ceramic tape comprises a glass fiber layer and fireproof organic coatings on the two sides of the glass fiber layer. The fireproof organic coating is prepared from the following raw material components in parts by weight: 40-50 parts of inorganic heat-conducting filler, 25-35 parts of inorganic ceramic filler, 20-30 parts of organic silicon rubber, 0.5-1 part of a curing agent, 0.5-1.5 parts of a coupling agent, 0.3-0.5 part of a reaction aid and 50-150 parts of a solvent. When the ceramic tape is faced with thermal runaway of a battery pack under an extreme working condition, the heat-conducting high-temperature insulating fire-resistant ceramic tape loses water quickly to take away part of heat in the face of quickly rising temperature, and meanwhile, a sufficiently dense ceramic shell structure is formed immediately to prevent flame spread, and meanwhile, the ceramic tape has extremely high insulation resistance and can be used for protecting the battery pack. The ceramic tape does not conduct electricity under extremely high voltage possibly generated when a battery pack is out of control, and the high-temperature fireproof and electricity-proof requirements of the market on the ceramic tape under extreme working conditions are met.

The invention relates to the technical field of nozzle fire extinguishing, in particular to an electric bicycle shed fire suppression system which comprises a temperature monitoring module, a fire source recognition module, a flame capturing module, a water spraying control module and a range adjusting module. According to the method, the temperature rise position is screened through synchronous temperature and position data, identification and marking are carried out in combination with a parking area and a charging area range, the risk of missing report of a fire source is avoided, flame continuous coordinates are recorded, a moving value is calculated to capture a flame deviation trend, and a deviation result and a nozzle coverage range are subjected to correlation judgment; water spraying control is only carried out in the coverage range and when the fire source deviates, dynamic association of coverage and the fire source is achieved by calculating the intersection area of the spraying range and the fire source range, the spraying angle is adjusted to complement the blind area when the area is insufficient, dynamic synchronization of the water spraying coverage range and the fire source state is formed, and the positioning accuracy and the response speed are improved. The local cooling capacity in fire treatment of the electric vehicle shed is enhanced, the flame spreading risk is reduced, and water sources are saved.

The invention discloses a halogen-free low-smoke flame-retardant polyolefin cable which comprises a composite cable core, a first flame-retardant wrapping tape layer, an inner sheath, a second flame-retardant wrapping tape layer, a waterproof layer, a metal sheath layer and an outer sheath which are sequentially arranged from inside to outside. The outer sheath is made of a ceramic polyolefin material which is extruded and covered on the metal sheath layer. According to the low-smoke halogen-free cable, the ceramic polyolefin outer sheath is introduced into the cable structure, so that the problems of sheath softening, insulating layer stripping, structure collapse and the like of a traditional low-smoke halogen-free cable during high-temperature combustion are effectively solved. The ceramic polyolefin material can be converted into a compact ceramic layer under the action of flame to form a firm heat insulation barrier, so that the integral structure of the cable is kept complete, flame spreading and conductor short circuit are prevented, and the fire resistance and continuous power supply performance are remarkably improved.

The utility model relates to the technical field of breather valves, in particular to a negative pressure end detection device of a breather valve. According to the scheme, the detection assembly can detect negative pressure changes in the storage tank, the fire retardant assembly can conduct active adjustment according to feedback of the detection assembly, and proper pressure in the storage tank is kept. By adopting the push rod and the push ball, the negative pressure change in the storage tank can be sensitively detected, and the detection precision is improved. The flame-retardant piece adopts a parallel structure of the supporting frame, the flame-retardant disc and the protection plate, even if the flame-retardant disc is heated to deform, a good flame-retardant channel can be kept, the problem that a single flame-retardant disc is prone to being blocked is avoided, the flame-retardant disc is formed by compounding a straight steel belt and a corrugated steel belt, multiple flame-retardant channels are formed, flame spreading can be effectively prevented, and the flame-retardant effect is improved.

The invention belongs to the field of fire simulation experiments, and provides a forest fire wind tunnel simulation experiment device and method, and the method comprises the steps: carrying out the combustion experiment of a self-designed combustion platform which fits the features of terrain and cover vegetation, so as to obtain the fire behavior duration, spreading trend, damage degree and the like of forest fire, and carrying out the data integration; according to the invention, wind tunnel simulation is utilized, influence factors of various forest fires are comprehensively considered for a simulation experiment, and the simulation experiment is closer to real forest fires through a series of methods; the fire behavior characteristics, the flame spreading rule, the fire influence range and the forest ecological vegetation damage condition after the forest fire is influenced by various factors are explored, and a powerful basis is provided for forest fire prevention and control.