407 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 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 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 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 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.

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 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 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.

The utility model relates to an energy storage container with a fire-fighting independent module, which comprises a container body, a plurality of battery clusters and a plurality of fire-fighting independent modules, a fire extinguishing medium is independently arranged in each fire extinguishing independent module, each fire extinguishing independent module is provided with a nozzle used for spraying out the fire extinguishing medium, and the multiple fire extinguishing independent modules are arranged in a container body. According to the energy storage container, an existing fire-fighting structure composed of a fire-fighting gas cylinder and a fire-fighting pipe network is abandoned, the gas cylinder and the fire-fighting pipe network are omitted, a new fire-fighting structure is arranged again, fire extinguishing media are directly arranged in the fire-fighting independent modules, and the multiple fire-fighting independent modules are directly distributed in the container body; and the plurality of independent fire-fighting modules can be triggered to directly spray out the fire extinguishing medium. And moreover, a fire extinguishing medium can be closer to an ignition point, the reaction is quicker, and the arrangement can be more flexible and variable.

The present application belongs to the technical field of forest fire research, and specifically discloses a forest fire simulation monitoring method and system. The method divides multiple forest fire simulation areas, determines the area where the ignition point is located as a target area; uses a UAV to carry a Fourier infrared spectrometer to collect spectral images in the target area; compares the spectral images with the spectral bands generated by the combustion of existing combustion products to determine the types of combustion products in the target area; based on the spectral images in the target area and the corresponding combustion product types, a flame spectral radiation model is constructed; multiple forest fire danger levels and the corresponding flame spectral radiation ranges of each forest fire danger level are set in advance, and the flame spectral radiation parameters output by the flame spectral radiation model are compared with all flame spectral radiation ranges to determine the forest fire danger level of the target area. By using the flame spectral radiation model, the present application realizes accurate detection and identification of forest fires.

The utility model discloses an underground garage lithium battery electric automobile fireproof device which comprises a material storage tank, fire extinguishing materials are contained in the material storage tank, an output pipe is connected to the outer side wall of the material storage tank, and a material pump is connected to the output pipe; the spraying pipe group is communicated with the discharging end of the material pump, the spraying pipe group is arranged above the parking space, the end part of the spraying pipe group is connected with a spraying table, and the spraying table is connected with a spraying head and a smoke temperature sensor; the folding film bag is annular and is arranged on the peripheral side of the vehicle, one end of the folding film bag is connected with a feeding pipe, the feeding pipe is connected and communicated with the discharging end of the material pump, the folding film bag is supported in an external material supply state and forms an isolation fence, and a fire extinguishing material sprayed by the spraying head is temporarily stored in the isolation fence and immerses an ignition point; the control console is fixed on one side of the material storage tank and is respectively in electric signal connection with the material pump and the smoke temperature sensor. The fire extinguishing device can avoid fire spreading, effectively extinguish fire and reduce property loss.

The invention discloses an intelligent vehicle fire prevention and control method and system and a storage medium, and belongs to the technical field of vehicle safety, and the method comprises the steps: obtaining a periodic thermodynamic diagram of a target area, receiving the thermodynamic diagram, converting the thermodynamic diagram into a temperature matrix, generating a fire signal of the target area according to the temperature matrix, and sending the fire signal to a server; cutting off a main power supply of the vehicle according to the fire signal, starting an independent power supply module to supply power, and generating an alarm signal corresponding to a fire behavior grade and a first fire extinguishing instruction for starting a fire extinguishing packet closest to an ignition point to extinguish fire for the first time; and if the alarm signal is still received within the preset time after the first fire extinguishing, a second fire extinguishing instruction is started for starting all the fire extinguishing bags around the ignition point to perform second fire extinguishing. According to the invention, information of a target area can be sensed in real time, fire behavior and danger can be found as soon as possible, and intelligent fire prevention and control can be realized through unified management of the main controller.

The invention relates to the technical field of fire fighting, and discloses a fire extinguishing control method and system for an elevating fire fighting truck and the elevating fire fighting truck. The fire extinguishing control method comprises the steps that the range of a fire area is determined, and the fire area is divided into a plurality of fire subareas; obtaining an infrared thermogram of the fire area; determining an ignition point partition with the highest temperature in the plurality of fire partitions according to the infrared thermogram; the fire extinguishing distance between a water cannon of the elevating fire truck and the ignition point partition is obtained; and determining water spraying pressure and water spraying angle of the water cannon according to the fire extinguishing distance. According to the fire extinguishing control method for the elevating fire truck, the fire extinguishing system and the elevating fire truck, accurate fire extinguishing can be conducted on the ignition point in the closed space, the fire extinguishing efficiency is improved, and fire losses are reduced.

The invention relates to the technical field of energy processing, and provides a powder alternative fuel system, which comprises a crushing bin; a supporting part is arranged at the bottom of the crushing bin, a mounting frame is arranged on one side of the crushing bin, a crushing bin is arranged on the surface of the mounting frame, two sets of symmetrically-arranged crushing parts are arranged on the inner wall of the crushing bin, and a driving part matched with the crushing parts is arranged on one face of the crushing bin. According to the device, raw materials are thoroughly and homogeneously crushed into fine powder through combination of a double-roller type coarse crusher and a high-speed crusher, a heating pipe and a temperature control system are innovatively integrated in a crushing bin, online drying can be performed according to the humidity of the raw materials, and the fuel heat value is increased. The processed powder fuel is stably and directly conveyed to a combustor in an anti-blocking and anti-backfire mode through a spiral-rotary valve-wind power jet mechanical and pneumatic two-stage closed conveying chain, and full-process automatic and closed operation from raw materials to ignition points is achieved.

The utility model provides a fire suppression device, which comprises a detection unit, a processing unit and an execution unit, and is characterized in that the detection unit at least comprises an infrared temperature sensor, a camera module with a flame recognition function and a laser ranging module, the infrared temperature sensor and the camera module with the flame recognition function are used for detecting flames, the laser ranging module is used for determining an ignition point, and the detection unit sends a detected signal to the processing unit; the processing unit is used for processing the received signal, sending the signal to the laser ranging unit according to a processing result, and sending the signal to the execution unit; and the execution unit is used for receiving the signal and executing fire suppression on the ignition point. The fire suppression device is compact in structure, high in flame detection and positioning accuracy, fast in fire suppression response, low in maintenance cost and high in cost efficiency performance.

The invention provides a preignition detection device. The processing circuit calculates a rotational variation amount of the engine and a spontaneous combustion start timing in order to detect the occurrence of pre-ignition in the engine. The engine is of a spark ignition type in which a gas mixture in a combustion chamber is ignited by spark discharge. The spontaneous combustion start timing is the timing at which the temperature of the mixed gas in the combustion chamber during the compression stroke reaches the ignition point of the mixed gas. When the rotational variation amount is equal to or greater than a predetermined threshold value and the spontaneous combustion start timing is earlier than the predetermined timing, it is determined that pre-ignition has occurred in the engine.

The invention relates to a method for preparing an electrical equipment insulating liquid from waste edible oil methyl ester with an improved pour ignition point characteristic, and belongs to the technical field of insulating liquids. Distilling the waste edible oil methyl ester to obtain distilled waste edible oil methyl ester; the method comprises the following steps: adding a molecular sieve, immobilized lipase IM-100, neopentyl glycol, distilled waste edible oil methyl ester and methyl nonanoate into a reaction vessel, reacting for 72-96 hours under the conditions that the temperature is 40-50 DEG C and the stirring rotating speed is 120-130 rpm, and separating out the molecular sieve and the immobilized lipase IM-100 to obtain waste edible oil-nonanoate neopentyl glycol diester; and carrying out adsorption, vacuum drying and filter membrane filtration on the obtained waste edible oil-nonanoic acid-based neopentyl glycol diester to generate the waste edible oil-nonanoic acid-based neopentyl glycol diester insulating liquid. The obtained waste edible oil-nonanoic acid neopentyl glycol diester insulating liquid has an excellent low-temperature flow characteristic, and the ignition point also reaches the fireproof safety standard of K-grade insulating oil, so that the risk of accidents of power equipment such as a transformer and the like under severe environment conditions is reduced to a great extent; the vacancy of the insulating liquid in high-safety application places such as offshore wind power and the like is supplemented, and more choices are provided for the application of the insulating liquid.

The utility model relates to a tunnel noise-reducing and flame-retardant pavement structure, which aims to solve the problems of high noise and poor flame-retardant property of the conventional tunnel pavement. The tunnel noise-reduction and flame-retardant pavement structure sequentially comprises an upper surface layer, a middle surface layer, a lower surface layer, a base layer, a subbase layer, a stress absorption layer and a tunnel inverted arch from top to bottom, thermal spraying type modified asphalt is adopted between the upper surface layer and the middle surface layer to serve as a first bonding layer, and thermal spraying type modified asphalt is adopted between the middle surface layer and the lower surface layer to serve as a second bonding layer. A broken stone sealing layer is adopted between the lower surface layer and the base layer as a third bonding layer; wherein the upper surface layer is made of a macroporous asphalt mixture doped with a flame retardant, the middle surface layer is made of an asphalt mixture of SBS modified asphalt, and the lower surface layer is made of a rubber asphalt mixture. According to the tunnel noise-reducing and flame-retardant pavement structure, the fire retardant is doped in the surface layer, the ignition point of the pavement is improved, and the pavement surface layer adopts the macroporous asphalt mixture, so that the driving noise of the pavement is reduced, and the influence on driving and pedestrians is reduced.