523 results about "Open fire" patented technology

The invention discloses a forest fire detection and disappearance method and system, and relates to the technical field of forest fire prevention and data processing, and the method comprises the steps: carrying out the fire inspection of a planned forest region through a plurality of inspection unmanned planes, and transmitting an image and airborne sensor data back to a command center in real time; identifying a fire behavior by using an artificial intelligence method, and performing fire behavior judgment and fire hazard grade division; the command center screens fire points according to the thermal images and updates the positions of the fire points in real time; the fire scene spreading trend is judged according to the returned data, and a basis is provided for the dispatching task of throwing the fire extinguishing bombs by the fire extinguishing unmanned aerial vehicle; using an MAPPO multi-agent reinforcement learning algorithm to train an optimal dynamic fire point collaborative disappearance regulation strategy; and after the open fire is extinguished, the inspection unmanned aerial vehicle continues to inspect to identify a re-ignition point or a smoke point, and secondary large-area fire is prevented. According to the method, efficient collaborative fire extinguishing, dynamic environment adaptation and resource optimization configuration can be achieved, and robustness is kept when part of intelligent agents fail.

The invention provides a combustible gas leakage protection system, which is characterized in that a control module of the combustible gas leakage protection system judges whether the concentration of combustible gas is lower than a first concentration threshold value or not when receiving concentration information detected by a concentration detection module, and generates a first control instruction when the concentration of the combustible gas is not lower than the first concentration threshold value. The control module further generates a second control instruction when the combustible gas concentration is not lower than a second concentration threshold value and the flame detection module detects that no open fire exists, and generates a third control instruction when the combustible gas concentration is not lower than the second concentration threshold value and the open fire exists. And the protection module executes different protection actions according to different control instructions of the control module. According to the application, the response scheme is divided into three grades, and corresponding protection strategies are implemented according to the detection signals of different grades, so that the response sensitivity and accuracy when the combustible gas leaks can be remarkably improved.

The invention discloses a power distribution overhead conductor tree touch fault fire moment determination method and system, and the method comprises the following steps: building an experiment environment, and collecting whole-process data according to a preset sampling frequency in the experiment environment; obtaining the initial moisture content of the experimental tree, calculating the moisture evaporation heat absorption amount and the moisture evaporation mass of the tree model, updating the moisture content of the tree, and performing aligned storage according to time; fitting the relation of the conductivity, the moisture content and the temperature of the tree in the whole process to obtain a conductivity function; constructing a resistance simulation curve by using a conductivity function according to the moisture content and the temperature of the tree, and constructing a resistance actual measurement curve by using voltage and current data collected in an experimental environment; and comparing the resistance simulation curve with the resistance actual measurement curve, and judging the moment when the resistance simulation curve and the resistance actual measurement curve are obviously bifurcated as the moment when the open fire appears. The method is wide in application range and low in cost and maintenance difficulty, and high accuracy is guaranteed.

The invention provides a shallow coal seam hidden fire source full-field monitoring and early warning method and system, and belongs to the technical field of coal spontaneous combustion fire monitoring and early warning, and the method comprises the steps: S1, obtaining thermal infrared image and visible light image data; s2, eliminating redundant thermal imaging frames and fuzzy thermal imaging frames; s3, obtaining a preliminary surface temperature field distribution map; s4, an open fire source and a suspicious area are distinguished, and positions are marked; s5, acquiring surface temperature gradient distribution and indication gas concentration data of the suspicious area, and acquiring surface temperature data and underground temperature data of the verification point, indication gas data escaping from the detection hole and radioactive radon content data; s6, establishing identification indexes of the dark fire source; s7, establishing a dark fire source grading risk standard; and S8, outputting an early warning result. According to the method, full-time, full-field and three-dimensional monitoring is realized, the accuracy and the reliability are improved, intelligent graded early warning and decision support are realized, and the environmental adaptability and the automation level are enhanced.

The invention belongs to the technical field of unmanned aerial vehicle group control, and relates to a control method of a fire extinguishing unmanned aerial vehicle group. According to the method, a dynamic fire scene thermodynamic diagram, meteorological data and a fire scene terrain model are collected, and fire scene spreading core kinetic parameters are extracted to calculate a dynamic buffer area; and then predicting meteorological data of a buffer area, generating a combustible flammability index grid map, carrying out weighted fusion on a downsampling result of the dynamic fire scene thermodynamic diagram and the two, and constructing a dynamic fire danger intensity field in a prediction period, thereby solving the problem that multi-dimensional heterogeneous data cannot be effectively integrated in the prior art, and realizing accurate prediction of the dynamic evolution trend of the fire. Meanwhile, state data of the unmanned aerial vehicle group are collected in real time, open fire areas are divided in combination with a fire danger intensity field, reachability of the unmanned aerial vehicles is evaluated, the unmanned aerial vehicle group capable of being dispatched for the second time is screened, traditional strategy defects are overcome, resource allocation is optimized, timely intervention in key areas is ensured, and the overall fire fighting effect is improved.

The present invention belongs to the technical field of smart charging piles. Disclosed is a highly integrated smart charging pile, which aims to solve the problem whereby, when an open fire occurs in a smart charging pile, the open fire cannot be extinguished rapidly, and easily leads to the burnout of and damage to the charging pile. The highly integrated smart charging pile comprises a smart charging pile body, wherein a steel cylinder is fixed to the top of one side of the outer side wall of the smart charging pile body, and an output end of the steel cylinder passes through the smart charging pile body, and is connected to a U-shaped pipe in a penetrating manner. In the present invention, by means of a fuse wire provided therein, after the fuse wire is blown by an open fire, a movable electrical contact block can be in contact with a static electrical contact block to start an electric push rod; and by means of a gear and a rack provided therein, a valve can be opened, and carbon dioxide in the steel cylinder can then enter the U-shaped pipe and is discharged into the smart charging pile body through an exhaust hole, such that the open fire at the position where the smart charging pile body is connected to a plug connecting wire can be extinguished, thereby avoiding the situation where the charging pile is burnt and damaged when the open fire cannot be extinguished in a timely manner.

The invention discloses a lithium ion battery energy storage cabinet with a fire extinguishing function and a use method, and relates to the technical field of new energy battery energy storage, the lithium ion battery energy storage cabinet comprises a cabinet body, and a plurality of battery cabins and independent fire extinguishing agent storage tanks are arranged in the cabinet body. Through a highly integrated'early warning-fire extinguishing-cooling 'triple active safety mechanism, extremely high safety and reliability are achieved, after the fire detection unit gives out an early warning, a fire extinguishing agent is sprayed to an ignition point through a fire extinguishing agent release pipeline and a nozzle, open fire is rapidly extinguished, then the integrated cooling system works, and the fire extinguishing effect is achieved. The high-temperature battery module is continuously cooled through the atomization nozzle, the problem that a lithium ion battery is extremely prone to reburning is efficiently solved, the supercapacitor serves as a standby power source, it is ensured that the whole fire extinguishing system can still obtain instant and reliable emergency power under the extreme condition that a main power source is interrupted, and then the fire risk and secondary damage are reduced; and a solid foundation is provided for large-scale safe application of energy storage of the lithium ion battery.

The invention discloses a preparation method of a smokeless flame-retardant fire blanket, and relates to the field of fire-fighting facilities, and the smokeless flame-retardant fire blanket is formed by compounding a surface layer, a middle layer and an inner layer; the preparation method of the smokeless flame-retardant fire blanket comprises the following steps: S1, preparing the surface layer: mixing the high-temperature-resistant silicone rubber with the solvent, the curing agent, the filler and the auxiliary agent, and uniformly stirring to form a silicone rubber coating solution; the high-temperature-resistant silicone rubber coating and the glass fibers are used as base materials, the inner layer is the macromolecular fire extinguishing material coating and has excellent fire extinguishing, heat insulating and high-temperature-resistant performance, the product is coated with multiple organic high-temperature-resistant silicone rubber, so that the organic high-temperature-resistant silicone rubber is tightly attached to the surfaces of the glass fibers, and a high-strength composite protective layer is formed; and a special polymer fire extinguishing material coating is further applied, and when exposed to open fire, the functional coating can quickly generate thermal decomposition reaction, release non-combustible gas and effectively reduce local oxygen concentration, so that the flame-retardant and fire-extinguishing effects are realized.

The invention relates to the technical field of image processing, in particular to a fire early warning method based on video analysis, and the method comprises the steps: obtaining images containing open fire and smog and wind speed data in various scenes, constructing a data set, training a fire recognition network, and marking the open fire and smog in the current frame image; calculating the flame intensity by using the size of a flame target frame extracted by the fire identification network and the gray value of pixel points in the target frame; combining the smoke target frame, the flame intensity and the wind speed data to determine the smoke diffusion degree of the scene corresponding to the current frame image; the fire possibility is evaluated by analyzing the variation trend of the flame intensity degree and the smoke diffusion degree, and whether a fire alarm is given or not is judged. The fire behavior is comprehensively judged through the size and position change of the flame target frame and the area and diffusion degree of the smoke target frame in combination with the wind speed data, false alarms are reduced, and the detection accuracy is improved.

The invention discloses a flame-retardant functional diaphragm and a preparation method thereof, and relates to the technical field of lithium batteries. The flame-retardant functional diaphragm comprises a diaphragm base material and a flame-retardant ceramic coating arranged on one side of the diaphragm base material, the flame-retardant ceramic coating is obtained by coating and drying flame-retardant ceramic slurry, and the thickness of the flame-retardant ceramic coating is 1-20 microns; the flame-retardant ceramic slurry comprises the following raw materials in parts by mass: 20-55 parts of inorganic particles, 5-30 parts of a phosphorus-based flame retardant, 5-30 parts of a nitrogen-based flame retardant, 100 parts of a solvent, 0.1-1 part of a dispersing agent, 0.2-1 part of a thickening agent, 1-3 parts of a binder and 0.1-0.5 part of a wetting agent. The high-phosphorus and high-nitrogen flame retardants are introduced and compounded into a ceramic coating system, so that the problems of rapid carbonization and fragmentation after ignition of the ceramic diaphragm are solved, and meanwhile, the effects of ignition without open fire after ignition and self-extinguishing after being away from the fire can be achieved.

The invention relates to the technical field of marine transportation safety, and discloses an AI video-based cabin smoke and open fire identification alarm system, which comprises a shipborne system and a shore-based system, the shipborne system comprises an information acquisition unit used for acquiring video, temperature difference, audio and other information of a control area; the smoke open fire and temperature difference identification unit is used for identifying smoke open fire and temperature difference appearing in the control and management area; the fire development situation evaluation unit is used for evaluating the fire development situation of the control and management area based on a fire situation development evaluation model; the shore-based system and the information acquisition unit are used for training a ship smoke open fire identification standard model and a ship fire situation development evaluation standard model; and alarm management: generating a coping decision based on the shipborne fire asking-for-help information. The defect that an existing smoke and fire sensor is low in sensitivity can be overcome, fire hazards can be found as soon as possible without dead angles, ship-shore linkage scientific rescue can be carried out in time, and ship fire prevention and shore-based rescue efficiency is 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.

The utility model relates to a spinning box cleaning device which comprises a cleaning device body and a recovery device, one end of the cleaning device body is communicated with an assembly chamber connector at the lower end of a spinning box, and the other end of the cleaning device body is communicated with a cleaning liquid supply device. The cleaning device body is used for leading cleaning liquid in the cleaning liquid supply device into a spinning branch pipe in a spinning box through an assembly chamber connector, one end of the recycling device is connected with a metering pump base at the upper end of the spinning box, and the other end of the recycling device is communicated with a cleaning liquid recycling box. The metering pump base is communicated with the assembly chamber connector through a spinning branch pipe, and the recycling device is used for recycling cleaning liquid in the spinning box into the cleaning liquid recycling box. Glued spinning raw materials in the pipeline are dissolved through the cleaning liquid and then cleaned, and compared with the mode that the pipeline is cleaned through open fire calcination in the prior art, the pipeline cleaning device is safer, more efficient, more convenient to operate and lower in cost, and the service life of equipment is longer.

The invention belongs to the technical field of energy storage equipment, particularly relates to a combined type energy storage cabinet and an energy storage system, and aims to solve the problems that in an existing technical scheme, only a ventilation mode is adopted for heat dissipation, a battery is difficult to stably cool, and a related fire extinguishing device is not arranged in the energy storage cabinet, so that fire is difficult to extinguish in time when the battery is on fire. According to the scheme, the energy storage cabinet comprises an energy storage cabinet body, and two door plates are symmetrically hinged to one side of an opening of the energy storage cabinet body; the plurality of partition plates are arranged in the energy storage cabinet body at equal intervals; according to the technical scheme, a plurality of batteries can be cooled in a dispersed heat exchange mode, so that the batteries can operate stably, open fire can be extinguished in time when the batteries are overheated and are on fire, and therefore, in the actual use process of the technical scheme, the battery cooling device can be used for cooling the batteries, and the service life of the batteries is prolonged. The method has good stability and reliability.

The utility model provides an anti-spilling flow guide device of electric energy storage equipment. The anti-spilling flow guide device comprises a shell and a flow guide device, wherein an inner cavity is formed in the shell for accommodating the secondary battery, and the shell is provided with an exhaust port for communicating the inner cavity with the outside of the shell; the fluid director is arranged in the inner cavity of the shell, at least one part of the fluid director and the shell are arranged in a spaced mode, a fluid director channel extending towards the exhaust port is formed between the fluid director and the inner side wall of the shell, and the fluid director is provided with at least one fluid director blade arranged on one side corresponding to the positive electrode of the secondary battery; the guide vane is provided with an oblique angle for guiding flame or high-temperature gas generated by the secondary battery into the guide channel, so that the flame or the high-temperature gas is guided to the exhaust port and then discharged out of the shell; according to the invention, flames and high-temperature gas generated by thermal runaway of the secondary battery can be guided to the exhaust port, so that further damage caused by open fire is avoided.

The utility model provides a smoke exhaust flow guide cover, a battery and electric equipment, and relates to the technical field of battery safety. The smoke exhaust flow guide cover comprises a cover plate, a first cover body and a second cover body. Wherein the cover plate is used for being connected with a battery pack in a sealing manner, and an anti-explosion valve port for accommodating the anti-explosion valve is formed in the cover plate; the first cover bodies are connected with the cover plate and correspond to the anti-explosion valve ports one to one, first smoke outlets are formed in the first cover bodies, and the first smoke outlets and the anti-explosion valve ports are arranged in a staggered mode; the second cover body is arranged on the side, connected with the first cover body, of the cover plate and covers the first cover body, a second smoke exhaust port is formed in the second cover body, and the second smoke exhaust port and the first smoke exhaust port are arranged in a staggered mode. By using the smoke exhaust guide cover in the battery, when the battery is in thermal runaway, the exhaust direction of smoke is changed, the exhaust distance is prolonged, the resistance is increased, and the flowing speed and temperature of the smoke are reduced, so that the smoke is not easy to generate open fire with other combustibles after being exhausted, and the damage to personnel and property is reduced.

The utility model relates to the technical field of fireplace cabinets, and discloses a safety protection fireplace cabinet which comprises an equipment bottom plate, a protection cabinet is connected to the upper surface of the equipment bottom plate in an inserted mode, and a detector, a first alarm, a closing rod, a closing motor and a closing lead screw are sequentially connected to the upper surface of the protection cabinet in an inserted mode from front to back. The fireplace fire extinguishing device is reasonable in structure, clear water in the water tank is pumped through rotation of the water pump, water is sprayed into a fireplace, open fire in the fireplace can be rapidly extinguished, fire disasters caused by unattended open fire in the fireplace when people go out are avoided, and when the detector detects smoke, the first alarm gives an alarm to remind people to deal with the smoke to avoid smoke poisoning. The smoke exhaust fan on the fan pipe rotates to extract and exhaust smoke in the fireplace, the smoke is quickly exhausted to prevent the smoke from influencing the indoor air quality, two closing doors are closed to prevent the smoke from entering the inner chamber after the second alarm gives an alarm, and the smoke enters the collecting box through the collecting pump, so that the smoke is prevented from entering the indoor unconsciously to influence the health of personnel.

The utility model provides a thermal runaway protection device and a battery pack. The thermal runaway protection device is used for thermal runaway protection of the battery pack, and the battery pack comprises a first anti-explosion valve and a second anti-explosion valve. The thermal runaway protection device comprises an inflation assembly, an exhaust assembly and a control assembly. The inflation assembly is arranged on the first anti-explosion valve, is communicated with the interior of the battery pack and is used for filling inert gas into the battery pack; the exhaust assembly is arranged on the second anti-explosion valve and is communicated with the interior of the battery pack; the control assembly is electrically connected with the air inflation assembly and the air exhaust assembly and used for controlling starting and stopping of the air inflation assembly and the air exhaust assembly. According to the utility model, open fire after thermal runaway of the battery pack can be avoided, and the thermal runaway protection device has the advantages of good thermal runaway protection performance and high electrical safety.

The invention relates to the technical field of forest fire emergency disposal, in particular to a helicopter-borne forest fire automatic identifying, positioning and extinguishing method and system. The method comprises the following steps: identifying infrared suspected fire points according to meteorological conditions and a space-time weight matrix; analyzing the probability of the open fire and the smoke by using the spectral response difference of the open fire and the smoke in different wavebands; generating a high-confidence three-dimensional fire point list based on a D-S evidence theory in combination with the infrared suspected fire point, the open fire and smoke probability, the combustion intensity and the live wire intensity; constructing a multi-objective optimization model, and solving a to-be-extinguished line and a region priority list in combination with the multi-objective optimization model, fire scene topographic feature parameters, fire line spreading features and the high-confidence three-dimensional fire point list; and generating or adjusting a flight route and a fire extinguishing instruction through a model prediction control framework based on a delivery window, the high-confidence three-dimensional fire point list and the to-be-extinguished line and area priority list.

The invention discloses a brazing welding device and a brazing welding method, and the brazing welding device comprises a welding seat, a pressing piece and an induction heater. A copper terminal is placed on the welding seat; the pressing piece comprises a first pressing part used for pressing the copper terminal on the welding seat and a second pressing part used for pressing the aluminum wire on the copper terminal; the induction heater utilizes induction current to heat, only the brazing filler metal is melted in the brazing process, and the brazing filler metal is fully diffused with the aluminum wire and the copper terminal to form firm metallurgical bonding. According to the brazing welding device, induction welding is used for replacing a traditional flame welding mode, no open fire exists in the whole welding process, the risk of fire disasters is reduced, and meanwhile the vision or skin of operators cannot be injured; meanwhile, only brazing filler metal is melted in the induction welding process, the first welding piece and the second welding piece are both kept in a solid state, and the welding difficulty is reduced; the induction welding has the advantages of high heating speed, high efficiency and the like, the welding time can be shortened, the production efficiency is improved, and the production cost is reduced.

The invention provides an intelligent electric energy metering box capable of being remotely regulated and controlled, and relates to the technical field of electric energy metering, the intelligent electric energy metering box comprises an embedded assembly, a box body and a fence mechanism, a mounting cavity is formed in the embedded assembly, the box body is embedded in the mounting cavity, the side edge of the box body is attached to the inner wall of the mounting cavity, the embedded assembly is used for being embedded in a wall, and the fence mechanism is arranged in the box body. The front end of the embedded assembly is provided with a fence mechanism, the fence mechanism is connected with the top area of the embedded assembly, and the fence mechanism is used for shielding and covering the front end area of the box body. When overheating or even open fire occurs in the box body, the inner box body can be remotely controlled to move, an approximately closed structure is formed in the inner side space, and the box body can be prevented from being damaged. And finally, oxygen input is blocked through the sealing effect, the fire extinguishing purpose is achieved, the protection effect can be provided for the internal smoke sensor in the process, meanwhile, external rainwater and dust can be prevented from entering the box body, and the protection effect on internal power equipment is enhanced.

The invention discloses a mounting method for a liquid dome insulation box of an LNG ship containment system, and the method specifically comprises the following steps: S1, connecting the insulation box with the bottom of a liquid dome segment, and connecting the insulation box with the top of the liquid dome segment through a chain block and a long screw rod; s2, the insulation box is tightly attached to the bottom of the liquid dome section through a chain block, and the liquid dome section and the insulation box are hoisted to the installation position of the upper portion of the maintenance system together; and S3, after hoisting of the liquid dome segments is completed, the insulation box and the liquid dome segments are separated through a chain block, resin strips of the insulation box are arranged, the insulation box is connected with the bottoms of the liquid dome segments again, and installation of the insulation box is completed. According to the invention, the insulation box and the liquid dome segment are connected through the screw rod, and the separation and connection of the insulation box and the liquid dome segment are realized through the chain block, so that the liquid dome insulation box is prevented from being damaged by open fire and high temperature generated by the welding work of the liquid dome segment, and the quality and safety of the insulation box during installation are improved.

The invention discloses lithium ion energy storage battery over-temperature protection and multi-dimensional safety management and control integrated equipment, and belongs to the technical field of battery over-temperature protection. And the multiple sets of buffering mechanisms are arranged, and the multiple sets of buffering mechanisms are all arranged in the protection outer box. According to the lithium ion energy storage battery over-temperature protection and multi-dimensional safety management and control integrated equipment, through the use of the high-temperature pressure relief mechanism, when the battery is in thermal runaway and the internal pressure is suddenly increased, a pure mechanical pressure relief sealing structure is burst open, the response speed is far higher than that of an electric control system needing to be recognized by a sensor, and a high-pressure jet flow generates negative pressure when passing through a throat; the fire extinguishing dry powder is automatically sucked out from the dry powder cavity, no external instruction or power is needed in the process, seamless connection of pressure relief, namely fire extinguishing is achieved, the dry powder is violently mixed with the high-temperature jet flow in the pressure relief channel, a large amount of heat can be instantly absorbed, the temperature of the jet flow can be reduced, open fire can be directly extinguished, and fire is effectively prevented from spreading in the box.

The invention provides a camera-assisted BMS decision-making fire-fighting method, device and equipment and a medium, and the method comprises the steps: collecting a visible light image and an infrared thermal image of a battery module, and obtaining the operation data of the battery module; performing visual feature extraction on the visible light image to obtain visual features, and determining a hot spot state according to the infrared thermal image; when the visual features of the battery module are abnormal, the hot spot state is open fire out-of-control spreading and the operation data exceed a preset threshold value, performing space-time alignment processing on the visual features, the hot spot state and the operation data to obtain a space-time alignment multi-source fusion sequence; and inputting the space-time alignment multi-source fusion sequence into a pre-trained multi-modal fire risk assessment neural network model, and outputting a fire risk level. According to the method, space-time alignment and cross-modal interaction can be carried out on the visual features and BMS electrical parameters, the problem of false alarm and missing alarm caused by the fact that a single sensing dimension is prone to interference is effectively solved, and the accuracy and robustness of risk judgment are improved.

The utility model provides a fire-fighting device and energy storage equipment, the fire-fighting device is applied to a battery cell of the energy storage equipment, the fire-fighting device comprises a fire-fighting main body and a thermosensitive wire group, and the fire-fighting main body is used for spraying a fire extinguishing agent to the battery cell; the thermosensitive wire set comprises a thermosensitive agent, a containing sleeve and a fireproof sleeve, the thermosensitive agent is located in the containing sleeve, the containing sleeve is connected with the fire-fighting main body, the fireproof sleeve is arranged on the containing sleeve in a sleeving mode, and the fireproof sleeve wraps the end, away from the fire-fighting main body, of the containing sleeve; wherein a heat reduction layer is arranged between the fireproof sleeve and the accommodating sleeve, and the heat reduction layer is configured to reduce heat transferred to the thermosensitive medicament, so that the temperature of the thermosensitive medicament is below the ignition temperature before the battery cell generates open fire. The above arrangement can improve the problem that the thermosensitive lead of the fire-fighting device is ignited in advance.

The invention discloses a fire risk assessment method, device and equipment and a storage medium, and relates to the technical field of data processing, and the fire risk assessment method comprises the steps: collecting an environment image of a to-be-monitored region through a camera disposed in a preset region; performing target detection on the environment image to obtain entity information in the environment image; comparing the entity information with a preset fire hazard feature to obtain a comparison result; determining a fire hazard existing in the to-be-monitored area based on the comparison result; and determining a fire risk assessment result according to the fire hazard. According to the method, the entity information in the environment image is compared with the fire hazard characteristics, so that the fire risk assessment result is obtained, and compared with an existing mode of determining whether a fire exists or not through temperature identification and open fire identification, early warning can be carried out in time before the fire occurs, and the fire early warning efficiency is improved.

The utility model relates to the technical field of insulation board, and disclose a double -faced composite fireproof renewable insulation board, including the board body, the board body is sequentially provided with the heat preservation layer from inside to outside. The double -faced composite fireproof renewable insulation board, when the high temperature or open fire appears outside, the first fireproof layer and the second fireproof layer of both sides give priority to play the fire -resistant barrier effect, rely on material high -temperature -resistant, non -combustion characteristics, block flame spread and high -temperature transmission, the heat insulation layer in the middle, with the help of the closed bubble structure evenly distributed inside, reduce air convection and heat conduction, realize heat barrier, maintain the temperature difference of both sides of the board body to reach the heat preservation effect, the reinforcing layer is connected closely with the heat preservation layer and the second fireproof layer through epoxy resin adhesive, both strengthen the bonding strength of each layer, prevent interlayer peeling, and improve the overall structural stability of the board body, avoid its deformation, cracking when stressed or temperature changes.

The invention provides a restaurant exhaust air recovery type kitchen ventilation system and method based on air volume self-adaption. The system comprises a restaurant ventilation subsystem, a kitchen non-open fire area ventilation subsystem and an air path switching controller. A restaurant main exhaust pipe of the restaurant exhaust fan is connected with a restaurant first exhaust branch pipe and a restaurant second exhaust branch pipe, the restaurant first exhaust branch pipe is communicated into a public walkway of a kitchen non-open fire area, a second air valve is arranged on the restaurant first exhaust branch pipe, the restaurant second exhaust branch pipe is communicated to the outside, and a third air valve is arranged on the restaurant second exhaust branch pipe; the kitchen non-open-fire area fresh air fan and the kitchen non-open-fire area indoor fresh air pipe are communicated with the kitchen non-open-fire area, a first air valve is arranged on the kitchen non-open-fire area indoor fresh air pipe, and the first air valve, the second air valve, the third air valve and the restaurant fresh air fan are all connected with the air path switching controller. The invention relates to the technical field of building ventilation and air conditioning, and can solve the problems of energy waste and uneconomical system operation in the prior art.

The invention relates to the technical field of coal drying, in particular to central pipe heating coal upgrading and drying equipment. The coal dryer comprises a cylinder, the two ends of the cylinder are connected with a front-end extension pipe and a rear-end extension pipe respectively, a drying cavity is formed in the cylinder, a heating structure is arranged in the drying cavity, the section of the heating structure is circular, the heating structure is of a circulating pipeline structure, and low-temperature airflow is introduced into a pipeline and used for achieving non-contact low-temperature drying operation on coal. A drying mode of circulating airflow between the central pipeline and the 18 seamless steel pipes is adopted, so that a heat source is not in direct contact with coal, no open fire is generated in the whole process, and the hidden danger of explosion caused by contact between coal dust and the open fire is eliminated fundamentally; and meanwhile, the problems of local overheating, coal property change and the like caused by direct contact in traditional high-temperature drying are solved, and the safety of the drying process is improved.

The invention discloses a smog gas sample generation and storage device for testing an underground coal mine smog sensor, the smog gas sample generation and storage device comprises a storage cylinder, a smog adjusting unit and a smog generation unit, the smog adjusting unit is arranged in the storage cylinder, and the smog adjusting unit is composed of a movable adjusting piston and an adjusting structure; the adjusting piston is arranged in an inner cavity of the storage barrel, the adjusting structure is used for adjusting the position of the adjusting piston, pre-storage and quantitative taking of a smoke sample can be achieved through cooperation of the storage barrel and the adjusting piston, and therefore the underground open fire danger is avoided; meanwhile, the adjusting piston is finely controlled by the control assembly, so that the smoke is stably output at a constant speed, and the accuracy of the calibration concentration is ensured; and the anti-deposition assembly is automatically started when the smoke is output through the linkage driving assembly, so that the smoke particles are effectively prevented from settling at the bottom of the storage cylinder, and the uniformity and stability of the concentration of the gas sample are ensured.