537 results about "Ignition point" patented technology

The invention discloses an arc risk situation awareness prediction method and system based on multi-characteristic dynamic mapping, and belongs to the technical field of electrical fault detection.The method comprises the steps that arc characteristics are extracted according to a current waveform of an electric power system, and the arc generation position is determined by combining the propagation rule of the arc characteristics; predicting the development trend of the arc form image and the energy signal according to the arc form image and the energy signal of the current waveform; according to the development trend of the arc characteristics, taking the arc as a heat source, reflecting the contact area of the arc and air by the arc form image, and combining with the heat transfer rule of the arc to obtain the temperature field distribution of the arc; and according to the arc generation position and the temperature field distribution, in combination with the distance perception between the ignition point of the evaluation object and the arc boundary, predicting the arc risk on the installation line of the evaluation object, and making corresponding emergency prevention measures according to the risk evaluation result. And accurate prediction, reliable identification and rapid cutting-off of the fault arc are realized.

The invention discloses a multi-element low-alloying high-speed extrusion flame-retardant magnesium alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: 0.5 to 2.0 percent of Al, 0.2 to 1.0 percent of Zn, 0.1 to 1.0 percent of Mn, 0.2 to 0.8 percent of Ca, 0.2 to 1.0 percent of heavy rare earth element Y, Er or Gd and the balance of Mg and inevitable impurities. Through the synergistic effect of non-rare earth elements Al, Zn, Mn and Ca and trace heavy rare earth elements, matching of low cost, good mechanical property and flame retardant property is realized. After the alloy is subjected to optimized bipolar homogenization heat treatment, the alloy can be subjected to extrusion production at the extrusion rate of 10-30 m / min. The room-temperature ultimate tensile strength is larger than or equal to 270 MPa, the yield strength is larger than or equal to 240 MPa, the ductility is larger than or equal to 12%, and the ignition point is larger than or equal to 850 DEG C. Important support is provided for propelling the magnesium alloy extrusion material to achieve equipment lightweight and low-carbon manufacturing in the fields of rail transit, aerospace and the like.

The invention relates to the technical field of cables, in particular to a low-smoke halogen-free flame-retardant cable which comprises a plurality of conductor wire cores, the conductor wire cores are sleeved with isolation layers, the multiple isolation layers are sleeved with an inner sheath, the inner sheath is sleeved with a functional protection assembly, the functional protection assembly is wound with a binding tape, and the binding tape is wound with an outer sheath. The binding tape is sleeved with an outer sheath. The function protection assembly comprises a plurality of circular rings arranged outside the inner sheath in a sleeving mode, a cooling assembly is fixedly connected between every two adjacent circular rings, and isolation assemblies for preventing ignition points from extending from the spontaneous ignition point of the cable to the two sides are installed on the outer sides of the circular rings and comprise a plurality of elastic plates made of magnetic metal and fixedly connected with the circular rings. Limiting grooves are formed in the sides, away from the circular rings, of the elastic plates, and the multiple elastic plates are sleeved with rubber rings. The problem that the cost of protecting the cable when the existing cable is blocked by the bridge frame to move along the direction parallel to the cable at a short-circuit spontaneous ignition point is solved.

The invention discloses an emergency protection device for BMS module lithium battery equipment, and relates to the technical field of lithium battery equipment, the emergency protection device comprises a shell, the top end and the bottom end of the shell are detachably provided with a top cover and a bottom plate through screws respectively, rectangular grooves are symmetrically formed in the outer surfaces of the two opposite sides of the shell in a penetrating mode, and sliding blocks are slidably installed on the inner walls of the two rectangular grooves; sealing plates used for shielding the rectangular grooves are fixedly mounted on the outer surfaces of the sliding blocks, and a turning plate is rotationally mounted between the two sliding blocks through a rotating shaft; the upper surface of the turning plate is used for mounting a main battery pack; the lower surface of the turning plate is used for mounting an auxiliary battery pack; a turnover mechanism is installed between the sliding block and the shell, and a monitoring mechanism is installed on the top cover. The temperature of the main battery pack during working is monitored through the monitoring mechanism, when the temperature of the main battery pack during working sharply rises to an ignition point, the monitoring mechanism unlocks the sliding block through the limiting mechanism, the turnover mechanism drives the turnover plate to turn over by 180 degrees, the elastic conductive column of the main battery pack reaching the ignition point is disconnected from the conductive contact, and the main battery pack is prevented from being ignited. Meanwhile, the turnover plate, the baffle and the bottom of the shell form a closed space to isolate oxygen and avoid ignition and spontaneous combustion of the main battery pack.

The invention relates to an intelligent partitioned fire extinguishing electrical cabinet, and effectively solves the problems that a fire extinguishing agent cannot cover an ignition point and the fire behavior is easy to spread. According to the technical scheme, the fire extinguishing device comprises an outer box body, and a support assembly and a fire extinguishing assembly are arranged in the outer box body; a cabinet door is arranged on the front side of the outer box body, supporting plates are arranged on the left side and the right side of the support assembly, a plurality of ventilation openings are formed in the supporting plates, a plurality of blocking pieces are arranged in each ventilation opening, and the blocking pieces can block the ventilation openings after rotating synchronously. A plurality of partition plates and cross beams are arranged between the two supporting plates, and the partition plates divide the interior of the support into a plurality of cavities. A plurality of threading holes are formed in each partition plate; the fire extinguishing assembly comprises a fire extinguisher, an outlet of the fire extinguisher is connected with a pipeline, a branch pipe located in each cavity is arranged on the pipeline, and an electromagnetic valve is arranged at the end of each branch pipe; according to the intelligent fire extinguishing device, the heat dissipation design is considered, meanwhile, intelligent partition fire extinguishing can be achieved, and the ignition point is completely covered.

The present invention is directed toward an addressable ignition stage which produces an output sufficient to detonate a secondary explosive, generally. The present invention comprises addressability and ignition functions that may be used together or separately to incorporate a high-power resistor with a thermally conductive substrate allowing for operation at high temperatures for ignition. The ignition stage is amendable to high volume production, exhibits a high degree of reliability, robustness and operational dependability for use alone or configurable into existing technology.

The invention provides a flame-retardant magnesium alloy with efficient forming diversification and a preparation method of the flame-retardant magnesium alloy. The flame-retardant magnesium alloy comprises the following components in percentage by mass: 4.0-10.0% of Al, 0.2-1.6% of Ca, 0.01-0.5% of Mn, 0.1-1.5% of RE, less than or equal to 0.05% of inevitable impurities and the balance of Mg, and the added RE is one or any combination of Ce, Sm, La and Sr. The preparation method comprises the following steps: smelting and casting, granulating and pulping, and performing pressure injection molding. According to the preparation method, diversified efficient forming of complex curved surfaces, thin-wall parts, special-shaped components and the like can be achieved through cooperative regulation and control of components, the process and the structure, and the obtained flame-retardant magnesium alloy is compact in structure, has the multi-level structural characteristics including a spherical primary solid phase, a fine solidification secondary phase and a grain boundary net-shaped eutectic phase and meanwhile has good flame retardance and mechanical performance; the ignition point is 750-1200 DEG C, the yield strength is 130-200 MPa, the tensile strength is 230-300 MPa, the ductility is 5-20%, and the aluminum alloy is suitable for industrial production.

The invention discloses an urban underground comprehensive pipe gallery electrical fire monitoring and early warning method, which comprises the steps of 1, determining an index to be monitored, and deploying a multi-identification sensing node based on multi-identification wireless communication; the to-be-monitored indexes are acquired through a gas sensor, a temperature and humidity sensor, a voltage acquisition device and a near-infrared binocular camera, and are monitored and identified through a monitoring host. Step 2, based on the current electrical distribution condition, constructing an electrical fire monitoring and identification model; the method comprises the following steps: dividing test areas of a monitored building, setting a plurality of corresponding test nodes in each area, and mutually overlapping and associating the nodes to form a cyclic monitoring structure; and step 3, monitoring abnormal data acquisition and edge side data processing are carried out, and the ignition point is positioned based on binocular vision. According to the method, based on LoRa wireless communication and binocular vision image acquisition, fire hazard monitoring is carried out from multiple angles, the actual monitoring range is expanded, the fire hazard position is rapidly positioned, and the existing potential safety hazard is reduced.

The invention discloses a superfine dry powder automatic fire extinguishing method and system, and the method comprises the following steps: collecting multi-source parameters of a monitoring area according to a preset time interval; based on the multi-source parameters, whether an ignition point exists in the monitoring area or not is judged, and if yes, the first environment temperature rising rate, the smoke concentration change gradient and the first flame energy ratio are calculated; according to the temperature rising rate, the smoke concentration change gradient and the flame energy ratio, the fire behavior grade of the ignition point is judged; based on the fire behavior grade, a superfine dry powder spraying device is controlled to conduct graded spraying fire extinguishing; after graded jet fire extinguishing is conducted, the second temperature rising rate and the second flame energy ratio of the ignition point are calculated according to the preset time interval; and whether the ignition point has a reburning risk or not is judged based on the second temperature rising rate and the second flame energy ratio, and if yes, the superfine dry powder jetting device is controlled to conduct supplementary jetting.

The invention relates to the technical field of monitoring or controlling charging stations, in particular to a charging pile safety monitoring method and system, and the method comprises the following steps: 1, a monitoring stage; step 2, primary feedback; 3, a tracing analysis stage: determining a fire point and a fire reason; step 3.1, field condition extraction; step 3.2, fire point analysis: through the acquired on-site video data, based on image feature judgment, when the brightness L of a pixel in an image is greater than Lthresh and the color is within Crange, determining the region where the pixel is located as a suspected flame region F; according to the invention, data is collected in real time in an omnibearing manner through multiple sensors, and accurate and comprehensive monitoring and safety early warning are realized. By means of traceability analysis, fire points and reasons can be rapidly determined, and responsibilities can be defined. Primary feedback gives an alarm in time and assists in judgment, secondary feedback is specifically processed according to a traceability result, a double-feedback mechanism optimizes an emergency process, the user experience is improved, and the operation safety of the charging pile is comprehensively guaranteed.

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 belongs to the field of cable production, and particularly relates to a composite cable and a preparation method thereof. A filling material is arranged outside the plurality of cable cores; a protective sleeve is mounted outside the filling material; a pair of functional sleeves is mounted outside the protective sleeve; a plurality of pits are formed in the outer side wall of the functional sleeve; the pit hole is filled with a fire extinguishing material; the fire extinguishing material is prepared from perfluorohexanone fire extinguishing microcapsules; the exterior of the pair of functional sleeves is coated with an isolating membrane; the isolating membrane is spirally wound outside the functional sleeve; by means of the structure, when a small ignition point occurs near the cable and the cable is grilled, the fire extinguishing gas can be rapidly sprayed out to extinguish a fire source, and the protection effect on the cable is improved.

The invention provides a multi-unmanned aerial vehicle swarm collaborative fire extinguishing planning method for forest early fire, which comprises the following steps: step 1, constructing a multi-unmanned aerial vehicle fire point collaborative search method based on information driving, and enabling unmanned aerial vehicles to carry out fire point search on a possible fire area under the driving of temperature gradient change; 2, on the basis of the ignition point theory and the energy conservation criterion, the critical water flow needed by each fire point is calculated, and a fire extinguishing model is constructed to accurately calculate the fire extinguishing agent load needed by fire extinguishing; and 3, on the basis of the fire extinguishing agent load obtained through calculation, a multi-unmanned aerial vehicle group collaborative fire extinguishing model considering resource limitation is constructed in combination with an emergency bid invitation algorithm. According to the method, the task completion time can be effectively shortened, the response to the fire spreading dynamic characteristics and the efficient integration of the unmanned aerial vehicle resources are realized, the fire extinguishing task completion efficiency under the resource limitation condition is ensured, and the task efficiency and the fire suppression effect are improved.

The invention belongs to the field of fireproof cables, and particularly relates to a fire early warning emergency fireproof cable which comprises a plurality of cable cores. The plurality of cable cores are sleeved with an inner protective sleeve. The outer part of the inner protective sleeve is sleeved with an outer protective sleeve; a heat insulation filling layer is filled between the outer protective sleeve and the inner protective sleeve; the outer portion of the outer protective sleeve is sleeved with a sleeve. A plurality of honeycomb grooves are formed in the middle of the sleeve; the honeycomb grooves are filled with fire extinguishing agents. A plurality of nozzles are formed in the outer side of the sleeve; the nozzle is communicated with the honeycomb groove; the middle part of the nozzle is fixedly connected with a protective block; the protection block is formed by solidifying a liquid material at normal temperature; diaphragms are fixedly connected to the interiors of the honeycomb grooves; the diaphragm is arranged between the fire extinguishing agent and the protective block; through the above structure, when a small ignition point appears near the cable to burn the cable, fire extinguishing treatment can be automatically carried out on a small fire source, the situation of fire behavior expansion is reduced, and damage to the cable is reduced.

The invention discloses a fire-fighting unmanned aerial vehicle, and belongs to the field of unmanned aerial vehicles, the fire-fighting unmanned aerial vehicle comprises an unmanned aerial vehicle body, a water tank is fixedly mounted at the bottom of the unmanned aerial vehicle body, a water storage cavity is formed in the water tank, a spraying assembly is arranged in the water tank, the spraying assembly is matched with a water gun nozzle for use, and a camera body is slidably arranged on a fixed disc. Through the arrangement of the spraying assembly and the camera body, the water spraying range of the spraying assembly can be adjusted through a picture transmitted by the camera body, during initial fire extinguishing, the water spraying range of the spraying assembly is adjusted to the maximum state, and after the size of a sprayed fire tongue is displayed to be reduced through the camera body, the water spraying range of the spraying assembly is gradually reduced; and the water spraying range of the water gun nozzle is adjusted according to the fire behavior, the fire extinguishing operation of firefighters is simulated, and the fire extinguishing effect can be effectively and rapidly achieved.

The environment-friendly embedded fire extinguishing equipment comprises a main body assembly, and the main body assembly comprises a shell, a limiting box, a fire extinguishing agent storage tank, a negative pressure box, a flow guide fan, a negative pressure pipe and a smoke detector; the fire extinguishing agent storage tank is installed in the limiting box, the limiting box is installed on the inner rear wall of the shell, and one end of the negative pressure pipe is fixedly connected and communicated with the negative pressure box. During fire extinguishing, a driving motor drives a first gear shaft, the first gear shaft drives a driving gear, the driving gear drives a toothed plate through teeth, under cooperation of the driving gear and the toothed plate, a lifting seat moves in the vertical direction along the toothed plate, and at the moment, a nozzle can reciprocate in the vertical direction; when the first gear shaft rotates, linkage can be generated through the transmission belt, at the moment, the nozzle can swing up and down, the nozzle further swings up and down while moving in the vertical direction, a fire extinguishing agent can evenly and rapidly cover an ignition point, and the fire extinguishing speed and effect are improved.

The present invention discloses a high corrosion resistance, flame retardancy and high thermal conductivity die-cast magnesium alloy and a preparation method thereof. The weight percentage of each component in the die-cast magnesium alloy is Zn: 0.3-1.2%, La: 2.0-3.5%, HRE: 0.2-0.6%, Zr: 0.3-0.6%, Ca: 0.1-0.3%, Fe≤0.005%, Cu≤0.01%, Ni≤0.001%, HRE is any one of the heavy rare earth elements Y and Gd, and the balance is Mg. The die-cast magnesium alloy phase includes an α-Mg matrix phase, La2Mg 17 phase, long period structure X-phase ‑Mg 12 HREZn and Zr particle phases have 128~143 W·(m·K) ‑1 Thermal conductivity, ignition point above 880℃ and corrosion rate in 3.5wt% NaCl solution of 0.047~0.083mg / cm 2 / day's corrosion resistance, fine grain strengthening and second phase strengthening effects make the magnesium alloy have a yield strength of more than 160MPa. The method of the present invention can use recycled waste magnesium with complex components and more impurities as raw materials to manufacture high corrosion resistance, flame retardancy and high thermal conductivity die-casting magnesium alloys with low manufacturing costs.

The invention provides a water throwing aiming system and method based on a large fire extinguishing airplane, and the system comprises a photoelectric pod which is installed at the lower area of a nose in an external hanging manner; the aiming display and control board is installed in a cockpit, selects a manual / automatic water throwing mode by operating the aiming display and control board, receives target information sent by the photoelectric pod, and aims the target of the unit by using a continuous throwing point calculation and hitting point calculation algorithm through an operation model of a water body in the air; and the cable is used for establishing a data transmission channel between the photoelectric pod and the aiming display control board. According to the invention, the problem that water is automatically and accurately thrown to an ignition point when a current domestic large fire extinguishing aircraft executes a fire extinguishing task can be solved, manual / automatic accurate water throwing in the water throwing process can be completed, and the water throwing effect of a unit in different environments can be improved.

The invention relates to a box-type transformer substation, in particular to a fireproof box-type transformer substation which comprises a box-type transformer substation body, a connecting frame, a plurality of connecting pipes, a negative-pressure dry powder box, a moving frame, a rotating spray head and the like. The connecting frame is connected to the upper side of the interior of the box-type transformer substation body, and the connecting pipes are evenly connected to the connecting frame at intervals; the upper side of the right part of the box transformer body is provided with a negative pressure dry powder box, the upper side of the interior of the box transformer body is slidably connected with a moving frame, and the moving frame is rotatably connected with two rotating nozzles. After detecting smoke, a detection plate controls a special-shaped motor, so that a moving frame and a rotary spray head move left and right, the moving frame is separated from a stop lever, a sealing plate is opened, dry powder in a negative-pressure dry powder box is sprayed out of the rotary spray head, and the rotary spray head can rotate through rotation of a missing gear, so that the spraying range of the dry powder is enlarged; and the rotary spray head is positioned right above a fire point through the positioning rod to extinguish fire, so that the fire can be extinguished more effectively and quickly, and the fire extinguishing efficiency is improved.

The invention discloses a compound for flue gas deoxidation and a flue gas deoxidation method, and relates to the technical field of flue gas treatment for preventing spontaneous combustion injection of residual coal in a goaf. The compound comprises coal semicoke and a composite metal oxide which are mixed, wherein the composite metal oxide comprises CoO and CuO in a mass ratio of 7: (2.5-3.5); the compound is combusted through a fixed bed, and flue gas generated by combustion is deoxidized; when the coal semicoke is used for catalytic combustion deoxidation, CoO and CuO in a certain proportion are added, so that the oxygen consumption rate is high, the CO generation amount and the CO concentration are low, the ignition point is reduced, and the comprehensive effect is good; the problem that the concentration of O2 and the concentration of CO in the flue gas are too high when the flue gas is injected into an underground goaf is solved.

The invention discloses an unmanned aerial vehicle fire extinguishing aiming method and system. The method comprises the steps that an unmanned aerial vehicle carries a laser radar and an infrared thermal imager; performing dimension reduction on the laser point cloud to generate a two-dimensional depth map, calculating the discrete degree of each laser point, fitting the discrete trend direction, and moving the unmanned aerial vehicle along the discrete trend direction until the unmanned aerial vehicle reaches above the ignition point; the infrared thermal imager generates an infrared thermal image, calculates a heat ellipse, calculates a discrete ellipse according to the two-dimensional depth map, obtains a self-adaptive fire range according to the heat ellipse, the discrete ellipse and a range threshold value, and calculates a primary fire area, the unmanned aerial vehicle aims at the self-adaptive fire range, and extinguishes fire by adopting an anti-diffusion mechanism; and calculating a secondary fire area, updating a range threshold, and traversing the infrared thermal map. A plurality of sensors are adopted to realize fire extinguishing aiming, an anti-diffusion mechanism is adopted to extinguish fire after a self-adaptive fire range is obtained, fire diffusion can be effectively prevented, and high economic benefits and social benefits are achieved.

The invention discloses a coal gangue-based solid fuel which comprises pulverized coal, coal gangue particles, a binder, a combustion improver and a sulfur-fixing agent. After the combustion improver prepared by the method disclosed by the invention is added into the solid fuel, the ignition point of the fuel can be obviously reduced, the flammability index of the fuel is improved, and the combustion performance of the solid fuel is greatly improved.

A battery case and a heat management system for a battery module having the battery case, in which the battery case ensures airtightness allowing a liquid immersion cooling method based on a nonconductive refrigerant to be used in managing the heat of the battery module, and the internal temperature of the battery case and the level of the nonconductive refrigerant are controlled to remain constant so as to keep the battery cell below an ignition point, thereby preventing a fire from breaking out.

The utility model relates to the technical field of lighters, in particular to a lighter grinding wheel which comprises a wheel body and is characterized in that an installation hole is formed in the wheel body, the installation hole penetrates through the wheel body, the wheel body is installed on a lighter through the installation hole, tooth-shaped protrusions are arranged on the surface of the wheel body, and the tooth-shaped protrusions are arranged on the wheel body. The tooth-shaped protrusions are arranged in the circumferential direction of the wheel body. After the wheel body rotates, the tooth-shaped protrusions can make contact with the flint, in the contact process, the tooth-shaped protrusions can rub with the flint to generate sparks, so that ignition of the lighter is achieved, in the ignition process, the tooth-shaped protrusions replace the wheel body to make contact with the flint, the contact area is reduced, and therefore the situation that the wheel body is damaged in the rotating process is reduced; the service life of the grinding wheel of the lighter is prolonged, sparks can be generated more stably when the tooth-shaped protrusions are used for ignition, and therefore the ignition efficiency is further improved.

The invention relates to a high-pressure water mist fire extinguishing device connected with an unmanned aerial vehicle water spraying fire extinguishing device, which is particularly suitable for fire prevention and control in complex spaces such as parking lots. The device comprises an unmanned aerial vehicle body carrying a temperature detection camera and a high-pressure water mist fire extinguishing system, a detachable support is adopted to be connected with a high-pressure water mist spray head, and the spray head is connected with a ground high-pressure device through a multi-layer composite hose (resistant to pressure of 10-15 MPa and resistant to temperature of-40 DEG C to 260 DEG C). The temperature detection camera integrates pitching / horizontal double-axis adjustment and is matched with the fire alarm detection alarm to transmit fire scene data in real time, and the path planning module generates an obstacle avoidance flight path based on the position of an ignition point. A zoning fire extinguishing strategy is originally created, the parking lot is divided into a plurality of sub-areas to configure unmanned aerial vehicle clusters, and automatic identification and directional scheduling of fire sources are achieved. The three-dimensional maneuvering capability of the unmanned aerial vehicle is combined with the high-pressure water mist technology, the passing limitation of a traditional fire fighting truck is broken through, the fire extinguishing efficiency in narrow and small space is remarkably improved, the lightweight design (the weight of a hose is smaller than or equal to 0.8 kg / m) and the corrosion resistance characteristic (pH 2-12 environment adaptation) of the unmanned aerial vehicle are particularly matched with the complex working conditions of multiple obstacles and multiple electrical devices of a parking lot; and an efficient solution is provided for new risks such as new energy automobile charging fire.

The invention discloses a magnesium alloy ignition point test device and method under different atmosphere environments, comprising a bracket, a sample hanging basket and an air duct, wherein a heating furnace is installed on the upper part of the bracket, a resistance belt is installed on the inner wall of the heating furnace, the sample hanging basket is installed at the center of the heating furnace, the bottom of the sample hanging basket is used to place the ignition point test sample, a thermocouple group for monitoring the temperature change of the ignition point test sample is installed on the upper part of the sample hanging rod, a first thermocouple for monitoring the temperature change inside the heating furnace is also installed inside the heating furnace, the first thermocouple is connected to a temperature control module, the thermocouple group is connected to a data recording module, one end of the air duct is connected to the heating furnace, the other end of the air duct is connected to a gas cylinder, and a flow meter for controlling the atmosphere flow is installed on the air duct.

The utility model relates to a heptafluoropropane fire extinguishing device capable of intelligently adjusting a fire extinguishing angle. The heptafluoropropane fire extinguishing device comprises a tank body, the closable angle adjusting assembly is connected with the tank body in a fixed penetrating mode, the closable angle adjusting assembly is used for adjusting the chemical spraying direction during fire extinguishing, and the closable angle adjusting assembly comprises a telescopic rod, a first sleeve, a fire extinguishing pipe, a second sleeve and a motor; the telescopic end of the telescopic rod is connected with the side wall of the first sleeve through a hinge, the fire extinguishing pipe is fixedly arranged in the first sleeve in a penetrating mode, the side wall of an end opening of the fire extinguishing pipe is fixedly sleeved with the second sleeve, the side wall of the second sleeve is fixedly connected with an output shaft of the motor, and the spot type infrared detector is fixedly arranged on the side wall of the second sleeve. Different fire extinguishing angles can be fully adjusted according to an ignition point, meanwhile, the used fire extinguishing device can be automatically closed and recycled, and the safety of the fire extinguishing device is guaranteed.

The invention discloses a factory smoke discharge monitoring and analysis method based on multi-modal data. The method comprises data acquisition, a target identification model, an AiNa radiation energy detection model, a distance detection model, a radiation energy compensation model, a smoke discharge detection model and a trigger prediction and grading warning model. The invention belongs to the field of environment field monitoring, and solves the problem that an environment monitoring station is not high in accuracy and timeliness when monitoring and analyzing the brought-up pollution condition during factory smoke exhaust. The method has the advantages that a specific target and the temperature thereof can be quickly and accurately predicted; the prediction accuracy of the infrared camera is effectively improved; the condition that accurate detection cannot be carried out due to insufficient received radiation energy when the installation position of the infrared camera is far away from an ignition point is effectively improved; by means of multi-modal data fusion, various early warning signals are given according to the pollution condition of factory smoke exhaust, workers are helped to monitor the atmospheric pollution condition caused by factory smoke exhaust, and the atmospheric pollution treatment work is effectively guided according to the early warning signals.

The invention discloses a high-toughness flame-retardant magnesium alloy and an extrusion preparation method thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises the following components in percentage by mass: 4.0-8.0% of Gd, 1.5-4.0% of Y, 0.3-0.8% of Zr, 0.1-0.5% of Ca, less than or equal to 0.05% of impurities and the balance of Mg. The preparation method comprises the following steps: after smelting and casting, carrying out multi-stage homogenization heat treatment on a cast ingot; then hot extrusion is conducted, and rapid cooling is conducted immediately at the speed larger than or equal to 50 DEG C / min after extrusion; then carrying out warm finishing deformation at the temperature of 200-350 DEG C; and finally, aging treatment is conducted. Through cooperation of component design and process regulation and control, the average grain size of the alloy is smaller than 5 microns, the room-temperature tensile strength is larger than or equal to 450 MPa, the ductility is larger than or equal to 5%, the ignition point is larger than or equal to 900 DEG C, and the problem that the strength, toughness and flame retardance of the magnesium alloy are difficult to consider is effectively solved.

The invention relates to a new energy automobile wall-mounted charging pile structure which comprises a gas fire fighting device, a charging box, an electric wire, a charging gun, a fire fighting module and a separation module. In the fire-fighting module, gas used for fire fighting in a gas fire-fighting device can enter the charging box through a gas pipe and a gas transmission guide pipe by means of thermal fracture of a thermosensitive block and a thermosensitive ball, and meanwhile, separation of an electrical isolation sheet and an alarm is realized through a hooking rope, so that fire safety personnel can be notified while fire spreading is relieved; and meanwhile, an air bag strip and an air bag ball of the separation module are heated to expand to push a clamping block to be separated from an air bag groove, so that the charging gun and one end of an electric wire connected with the charging gun are separated from the charging box, a new ignition point is prevented from being generated, and meanwhile the situation that the fire is out of control due to the fact that the fire spreads out of the charging box is avoided.