825 results about "Fire spread" patented technology

The invention disclosed herein is directed to a fire retardant head-of-wall assembly configured to seal a linear head-of-wall construction joint or gap when exposed to a heat source such as a building fire. The inventive fire retardant head-of-wall assembly comprises a header track having an elongated intumescent strip affixed lengthwise on at least one of the outer sidewall surfaces of the header track and above a centrally located and outwardly protruding lengthwise corrugated groove. When exposed to a heat source such as a building fire, the intumescent strip is able to expand so as to at least partially fill the head-of-wall construction joint or gap; and in so doing, retard or prevent the spread of smoke and fire. The inventive fire retardant head-of-wall assembly has been certified as complaint with respect to Underwriters Laboratories, Inc.'s standards set forth in its Tests for Fire Resistance of Building Joint Systems—UL 2079.

The invention discloses a large high-rise building indoor fire urgent evacuation indication escape method and system, and belongs to the field of high-rise building fire safety. The large high-rise building indoor fire urgent evacuation indication escape method comprises the following steps: step 1, a fire source is located; step 2, a dynamic module of fire spread is set up; step 3, according to the dynamic module of fire spread in combination with the structural information of a building, the spatial position of an ignition point and the spatial position of fire-fighting equipment in a large high-rise building are determined, predictions are made over fire spread paths, and evacuation escape routes are planned; step 4, according to the designed escape routes, site equipment is controlled in a selective mode for assisting people in evacuation. According to the large high-rise building indoor fire urgent evacuation indication escape method and system, the fire control escape routes are made based on specific fire behavior, so that evacuation time is shortened; the existing problems that when a fire breaks out, a fire control evacuation escape way is crowded , low in efficiency and disorderly and stampedes easily occur are solved fundamentally; the practical significance of improving the safe evacuation performance of the large high-rise building and reducing the property loss and casualties caused by the fire in the large high-rise building is quite high.

The invention discloses a big data mining based integrated forest fire prevention informatization system. The big data mining based integrated forest fire prevention informatization system comprises a big data platform, and a multi-dimension perception subsystem, an early-warning prediction subsystem and a multi-hierarchy application subsystem, which are connected with the big data platform, respectively; the multi-dimension perception subsystem is used for acquiring various forest data, the big data platform is used for pre-processing and computing the data; the early-warning prediction subsystem can realize fire warning and prediction and forest fire spreading prediction; and the multi-hierarchy application subsystem is used for realizing forest resource planning, forest fire prevention management, and forest fire suppression dispatching and command. The big data mining based integrated forest fire prevention informatization system can realize multi-azimuth comprehensive monitoring on a forest, is used for mining and analyzing historical data and mass forestry data obtained by real-time monitoring to accurately predict forest fire and provide an early-warning function, can analyze the development tendency of the forest fire to provide aid in decision making, can put out the forest fire in an airland and multi-method manner, and can provide high-efficiency and accurate equipment and personnel assignment; and the system is integrated and has high informationization degree.

The invention discloses a stationary satellite-based fire remote sensing and monitoring method which solves the problem of automatic extraction of fire points in a forest and grassland, monitoring of a fire spreading situation and estimation of fire loss based on a stationary satellite. The method comprises the following steps: acquiring stationary satellite data, and calculating brightness temperature of image elements; judging latent fire point image elements from non-cloud and non-flare image elements in land image elements by using a method of a brightness temperature threshold value, and performing statistical judgment on the fire point image elements according to wave band information of background window image elements; culling out all-year-round high-temperature fire points based on a fixed fire point library and land utilization type data, and extracting positions and brightness temperatures of forest fire and grassland fire; providing a fire spreading situation sequence according to forest fire and grassland fire remote sensing and monitoring results of observation frequencies of the stationary satellite; estimating the loss caused by the forest fire or the grassland fire. The method disclosed by the invention quickly monitors a dynamic change of a disaster target, so that the efficiency for prewarning and emergently handling major disasters in China is further improved.

A smart alarm system determines when fire, carbon monoxide, or both are present in a specific area and responds accordingly. If fire is detected, alarms are activated, emergency services are notified, and ventilation, namely vents and fans, is cut off in the specific area where the hazard is detected. If carbon monoxide is detected, alarms are activated, emergency services are notified, and ventilation is increased by opening vents and activating exhaust fans to dissipate the gas from the area containing the gas. In the event both are detected, the system will keep the ventilation cut off to prevent the spread of fire.

Provision of an extension-type battery pack which is improved in safety thereof against dropping and impact application. Although a battery pack is susceptible to damage caused by an impact since partial battery cells are located outside the outline of a notebook PC when it is mounted on the notebook PC, the battery pack is provided with a partition wall structure including an air space and a fireproof wall formed of a material which does not melt at a temperature of combustible gas discharged from a gas discharge valve of the respective battery cells. The material of the fireproof wall is preferably mica or the like. The partition wall structure can be provided between an inside battery compartment and an outside battery compartment of the battery pack or can be provided among other battery cells. This prevents fire spreading to other battery cells even if high-temperature combustible gas is discharged from a battery cell damaged by an impact or the like.

The object of the present invention is to provide a fire extinguishing agent that can extinguish fire and check the spread of fire by easily containing water therein by means of heat due to the fire and solidifying thereby adhering to a burning object; a fire extinguishing water and a method for extinguishing fire by using it. Concretely, the present invention relates to a fire extinguishing agent comprising a thermosensitive polymer that is water-soluble at a temperature not more than a specific preset temperature and that gels or solidifies by containing water therein by means of heat due to a fire which attains to a temperature not less than the preset temperature; a fire extinguishing water obtained by dissolving the fire extinguishing agent into water optionally with a flameproofing agent or other fire extinguishing fire agent; and a method for extinguishing fire using the fire extinguishing water.

The present invention relates to one kind of super thin no-halogen less-smoke fireproof organic-inorganic composite paint and its preparation process. The composite paint is compounded with heat resistant organic and inorganic nanometer hybridized resin, organic resin, heat resistant pigment, heat resistant filler, carbon forming agent, foaming agent, catalyst, assistant, etc. In case of fire, the components of the paint synergy to swell, foam, isolate oxygen, delay heat transfer and inhibit fire spread. The fireproof paint may be used to form coating of controllable thickness in 0.2-2 mm, has fire resisting limit of 30-200 min, excellent heat resisting performance, excellent fire retarding performance, high fireproof performance, high anticorrosion performance and other advantages.

A low fire-spreading cigarette has a tobacco section including a columnar tobacco filler material, an inside wrapper paper sheer wrapping the outer circumferential surface of the columnar tobacco filler material and an outside wrapper paper sheet wrapping the outer circumferential surface of the inside wrapper paper sheet. The heat conductivity of the inside wrapper is 0.5 W.K<-1>.m<-1 >or more and the heat conductivity of the outside wrapper paper sheet is less than 0.5 W.K<-1>.m<-1>.

The invention provides a high-voltage high-power storage battery protection system, which is characterized by comprising a battery management control module, and a temperature control module, a smoke detection control module, an upper management system and a plurality of fire extinguishing devices which are respectively connected with the battery management control module through a circuit, wherein an input end of the temperature control module is connected with a plurality of temperature sensing devices through a circuit; and an input end of the smoke detection control module is connected with a plurality of smoke detection device through a circuit. By performing multi-point temperature monitoring on the storage battery, the high-voltage high-power storage battery protection system takes mean temperature as charging management of charging reference and simultaneously solves the problems of over-temperature and fire breakout of the storage battery through the temperature detection and smoke detection control in the using process, and the fire extinguishing devices are also arranged to effectively inhibit and prevent fire spreading after the storage battery is on fire.

The invention provides a battery cell able to avoid fire spreading or heating of the battery effectively, undergo fire extinguishment of a battery on fire, and may has compact structure so as to have high volume energy density. The battery cell of the invention is formed as follows, e.g., a spacer (52) interposed between a plurality of batteries in a battery module has an inner cavity. A filling agent having fire-extinguishing capability is filled in the inner cavity. An opening can be formed at a portion (low-melting point portion 14) of the spacer (52) by heat so that the filling agent can flow out of the spacer. The invention also provides a secondary battery packaged with flexible outer package; wherein a thermal conductive material layer formed of gelatinous matter is formed on a surface of the outer package.

System for assisting in reducing the spread of fire between adjacent rooms in a building proximate to the ceiling thereof includes an elongated header track, at least one elongated filler constructed at least partially of compressible or elastic material and at least one fire-blocker constructed at least partially of fire retarding material.

The invention provides a transmission line mountain fire spread warning method with the combination of public network weather. The method comprises a step of obtaining a fire point coordinate, a step of calculating the spread speed of a fire point spread direction based on the fire point coordinate, a step of calculating the linear position of the fire point in the spread direction after a spread time according to the spread speed, and obtaining a spread coordinate, a step of calculating the spread area of the fire point according to the spread coordinate, a step of carrying out warning level definition on the transmission line in the spread area according to the spread time and issuing warning. According to the method, an effective information support is provided for the judgment of a grid mountain fire disaster by a power department, the mountain fire spread speed from the fire point to the transmission line can be calculated, the warning level of the transmission line is judged through time according to the mountain fire spread speed, and the method has high accuracy and practicability and plays an important role in maintaining security and stability of a grid and reducing a disaster loss.

The invention discloses a hydrogel fire extinguishing agent. The hydrogel fire extinguishing agent is white powder and obtained in the manner that 5-10 parts of acrylic polymers, 10-15 parts of carboxy methyl cellulose, 10-15 parts of corn starch, 5-10 parts of dispersing agent, 10-20 parts of fire retardant, 1-3 parts of hydrocarbon surfactant and the like undergo modified treatment. The obtained fire extinguishing agent has the conventional water cooling fire extinguishment function, and the fire extinguishing agent and water can form a hydrogel film resistant to high temperature, good in fire resistance and high in coverage performance and adhesion performance, and the hydrogel film can isolate air, extinguish fire by smothering and effectively prevent the fire from burning again; if the fire extinguishing agent is sprayed to an unburned area close to the fire, an isolation strip can form, so that the spreading tendency of the fire can be effectively controlled, and the fire extinguishing efficiency can be significantly improved. Besides, fire extinguishment residues are free of pollution, easy to degrade, safe, environmentally friendly and free of doing harm to human beings, plants and the like. In this way, the hydrogel fire extinguishing agent is wide in application range, can be applied to civil facilities, public facilities, plant-station disaster relief, forest fire and the like, the dosage of the fire extinguishing agent is small, and therefore the hydrogel fire extinguishing agent has significant advantages.

The invention employs a blower of the type used by commercial landscapers. The device has an engine mounted on a frame. Shoulder straps attached to the frame allow the user to wear the device on his back leaving the hands of the operator free to operate other tools such as a chain saw or perform other tasks. Also, wearing the device on the back makes it easier to transport the device over long distances to the source of the fire or backfire to be started.The device's blower generates a stream of air at high speeds. This stream of air can be used to feed a fire when the air is directed at a fire. When used to extinguish a fire, air from the blower is tapped from a point 180 degrees removed from the blower output and mixed with exhaust from the engine. This mixture is diverted through a Y-shaped valve into the airstream coming out of the blower. When the device is used to start backfires a fire is started. The airstream, without the mixture of air and engine exhaust can be used to both encourage the propagation of the fire and direct the fire towards the main wild fire. The ability to quickly spread the backfire in the proper direction is imperative because a sudden change in wind direction or other weather conditions could cause the backfire to become as big a problem as the original fire.

The invention discloses an electric transmission line fire spreading predicating method and system based on a grid flow. The method includes the steps that firstly, fire point collecting equipment is used for obtaining fire point information; a GIS image of an affected zone is divided into a grid image, so that a grid terrain of the affected zone is obtained, the ground feature category of each grid is identified, grid-crossing fire spreading intensity is calculated under different meteorological conditions, and a fire spreading weighing grid chart of the affected zone is constructed; a fire spreading route from sources to sinks is searched for in the fire spreading weighing grid chart of the affected zone to establish a fire behavior spreading model, and coordinates of an affected pole tower, the zone area of spreading and the time for fire spreading to the pole tower are calculated; finally, corresponding alarms are given to different influence grades of fire spreading predicated according to the grid flow method. The electric transmission line fire spreading predicating method and system based on the grid flow have the advantages that the time for fire point spreading to an electric transmission line zone and fire behavior intensity can be rapidly calculated, fire behaviors are informed in time, and early warning is high in accuracy.

A fire resistant roofing tile which utilizes economical materials and is formed using an efficient manufacturing technique. The tile has components shaped to prevent fire spread significantly enough to achieve a Class A fire retardation rating. Recycled materials are used in a compression molding process for commercial appeal and benefit to the ecology.

The invention discloses a test device of transverse spreading of fire between bunched cables. The test device comprises a test bed main body and an assorted test and control system, wherein the test bed main body comprises a test bed top and a plurality of cable brackets; each cable bracket comprises a vertical rod and a plurality of transverse rods; the vertical rods can adjust the distance along the length direction of the test bed top; the transverse rods are mounted on the vertical rods and can adjust the distance along the height direction of the vertical rods; a plurality of cable fixing devices with adjustable positions are mounted on all the transverse rods; the assorted test and control system comprises a temperature acquisition system for acquiring and recording temperature data, a radiating heat flux acquisition system for acquiring and recording a radiating heat flux, a fire image acquisition system for recording fire spreading characteristics of the cables and analyzing and calculating a transverse spreading speed of the fire between the bunched cables, and an ignition system. The device can realize test analysis of the ignition risk and the fire spreading characteristics of the transversely adjacent cables under a condition of different positions of a faulted cable, and can comprehensively analyze the heat harm of fire in a region near to the bunched cables on fire.

A refrigerator reduces a quantity of deformation of a body by improving rigidity of the body using a reinforcement structure. The refrigerator may include an electric apparatus box in which electric apparatus components for controlling an operation of the refrigerator are accommodated. Electric apparatus components may be disposed in a hinge cover which is disposed in the front of the refrigerator to improve spatial utility and a reinforcement plate formed of a steel material may be disposed in the electric apparatus box to prevent a fire from spreading. A heating pipe fixed to a front edge of an inner case of the refrigerator prevents dew condensation in an outer case of the refrigerator. The heating pipe is mounted on a fixing groove formed in a mounting portion provided on the front edge of the inner case. The heating pipe is fixed to the mounting portion using a clip.

A composition which retards the spread of fire, protects assets at risk from fire damage and emits a material which aids in extinguishing the fire. The composition may be either in the form of a gel or a foam and may be used to protect any sort of object, such as personal property, real property or even humans, from fire. The gel form of the composition contains urea or a urea derivative that retains water and releases CO2 upon heating. In addition, a rheology modifier containing carboxyl groups is also employed. The foam form of the composition contains the urea or urea derivative and the rheology modifier, along with a foam generator such as sodium bicarbonate and citric acid. A method of retarding fire comprises the coating of an item with the fire retardant such that the retardant protects the item from the fire and aids in extinguishing the fire by releasing carbon dioxide.

The invention relates to the technical field of fire-fighting digitization, and provides a fire-fighting three-dimensional digital planning method fusing a fire behavior prediction model. The fire-fighting three-dimensional digital planning method comprises the steps: building a three-dimensional visualization model of a building structure according to a building structure drawing, and extractingthe internal layered structure information and fire-fighting information of the building structure; indoor panoramic image generation: collecting indoor information through a panoramic camera or a camera, and obtaining indoor material attributes and material parameters; and inputting the building structure internal layered structure information of the three-dimensional visualization model, the indoor material attribute and the material parameter information of the fire disaster and the weather information when the fire disaster occurs into the fire behavior prediction model to obtain a fire behavior spreading trend analysis result. By means of the three-dimensional visualization, indoor panorama and fire behavior prediction model technology, the fire-fighting three-dimensional digital planning method can be applied to various fire scenes in real time, can make corresponding adjustment of three-dimensional digitization and prediction models according to real-time fire scene dynamic changes, and can meet the fire fighting actual combat requirements. The fire-fighting three-dimensional digital planning method has the advantages of flexibility, convenience, accuracy, high efficiency, intelligent fire protection and scientific and technological fire protection.

The invention provides an intermittent high-rise building external wall automatic fire extinguishing system. The intermittent high-rise building external wall automatic fire extinguishing system comprises a plurality of fire detection devices, a control device, a plurality of fire extinguishing devices and a water supply device. The fire detection devices are distributed on the external wall of a building to form a fire detection network for detecting a fire situation at the outer wall of the intermittent high-rise building and transmitting the obtained information to the control device; the control device is used for acquiring a fire locus position of the intermittent high-rise building external wall according to the fire information of the fire detection devices and automatically controlling the water storage operation of the water supply device and the fire extinguishing operation of the fire extinguishing devices according to the preset procedure; the fire extinguishing devices located on the external wall of the building; each fire extinguishing device comprises a water curtain firefighting spray nozzle and a rain firefighting spray nozzle connected with a firefighting pipe in a controlling mode; the water supply device is connected with each fire extinguishing device through the fire pipe in a controlling mode to supply the water to the fire extinguishing device; the opening and closing of the firefighting pipe are controlled through the control device. According to the intermittent high-rise building external wall automatic fire extinguishing system, the role of effective fire retardance, cooling, isolation and fire fighting is achieved under the situation that the external wall of the building is on fire caused by the fire of some areas of the high-rise building or the external wall of the building is directly on fire, the spread of fire is avoided and the losses are reduced.

The invention discloses a fire-proof and water-proof evacuating and escaping elevator, which overcomes the defect that the traditional elevator always becomes a smoke and fire spreading channel in a fire disaster and the operation of the elevator is affected. The fire-proof and water-proof evacuating and escaping elevator comprises an elevator hoistway, a machine room, a fire-proof hall door and a car and has the technical key point that a fire control water pipe, a hoistway air supply duct and water guidance equipment composed of a water chute and a water duct communicated with the water chute are arranged in the elevator hoisway; a fire control shower nozzle connected with the first control water pipe is fixed on the upper part of the fire-proof hall door or the ceiling of the hall of an elevator waiting hall; the top of the car is provided with an air purification device for conveying fresh air into the car; the projection surfaces of the fire control water pipe, the hoistway air supply duct and the water guidance equipment in vertical direction are respectively positioned outside a car projection surface; and each landing in the elevator hoistway is provided with a temperature detection sensor. The fire-proof and water-proof evacuating and escaping elevator has the advantages of simple structure and reasonable layout, can reliably operate at the early stage of the fire disaster so as to quickly and safely perform the evacuating and rescuing functions, fire-fighting equipment of the elevator conforms to the standard specifications, and the fire-proof and water-proof performance is improved greatly.

The invention discloses a simulation experiment device of high-rise building three-dimensional fire behaviors under the effect of environment wind. The device comprises a high-rise building model, a rotary platform, a direction adjustable wind hole, a three-dimensional movable thermoelectric coupling frame and a fire source simulating device. The high-rise building model is a cuboid shell and is divided into four chambers, wherein the ignition experiment chamber is provided with the fire source simulating device and a size adjustable building window model. The bottom of the high-rise building model is connected with the rotary platform and matched with the external direction adjustable wind hole so that environment wind in any direction at any wind speed can be simulated. The three-dimensional movable thermoelectric coupling frame is of a combined rectangular structure, and the parameter measurement function of any position of an external wall surface can be achieved. The simulation experiment device for studying high-rise building three-dimensional fire spreading under the effect of environment wind is established for the first time, a wind direction adjusting system is safe, convenient to use and precise, the experiment device is provided with a complete parameter measuring system, and the complete process of a high-rise building from fire starting, flame spreading to final spreading towards the upper layer and adjacent side of the building can be studied.

The invention relates to a crown fire spread three-dimensional visualization method. The crown fire spread three-dimensional visualization method comprises estimating the fireline intensity, the flame length and the spread speed of a crown fire through an FARSITE forest fire spread simulation engine; establishing a fire and smoke particle system through a particle system; establishing a tree three-dimensional model and planting the tree model on a three-dimensional terrain landscape to form a virtual forest environment; customizing vertex shaders and fragment shaders of apparatuses of the model through a programmable pipeline and adopting a texture and color mixture method and an Alpha transparent texture method; setting a simulated starting and ending time, time step and space resolution and estimating a crown fire behavior and a fire field boundary so as to dynamically simulate the dynamic change process of the crown fire in the horizontal direction and the vertical direction. According to the crown fire spread three-dimensional visualization method, the spread process of the crown fire is simulated in a true three-dimensional visual mode and the crown fire spread three-dimensional visualization method can be applied to auxiliary fire-fighting decision, science popularization education, animation, games and the like.

The invention provides a method for evaluating the forest fire spreading risk of a power transmission channel. The method for evaluating the forest fire spreading risk of the power transmission channel is characterized by comprising the following steps that S101, a remote sensing image is preprocessed; S102, fire points and obstruction objective image elements are extracted based on the corrected remote sensing image; S103, fire outbreak point calculation is carried out; S104, the forest fire spreading speed is calculated; S105, burning range estimation is performed within predefined time duration; S106, a power transmission tower set affected by a fire is searched; S107, the forest fire spreading risk of the power transmission channel is evaluated. By the adoption of the method, various data of the wind speed and direction, the topographic slope, the vegetation type, ground barriers and the like are collected, so that a calculation method including forest fire spreading conditions and relevant factors for causing power transmission line tripping by the fire is established, hence, evaluating calculation of the forest fire spreading risk of the power transmission channel is achieved, and the national economy loss caused by large-area outage of a power grid can be effectively prevented and reduced.