179 results about "Flame propagation" patented technology

The invention discloses an in-cylinder combustion process and chemical reaction mechanism-based hydrogen ammonia emission generation prediction system and method, and relates to the technical field of hydrogen internal combustion engine tail gas emission control, and the system comprises an input variable acquisition module, a combustion simulation module, a chemical reaction simulation module, an emission generation prediction module and an output interface module; according to the method, a mechanism-driven multi-physics field coupling prediction system is constructed, the simplified assumption limitation of a traditional empirical model is broken through, high-precision dynamic analysis of the emission characteristics of the hydrogen-ammonia engine is achieved, in combustion process simulation, in-cylinder turbulence mixing and flame propagation details are accurately described by using a CFD model, and in-cylinder combustion simulation is achieved. The chemical reaction module can significantly improve the prediction credibility of unburned fuel residues and pollutant generation through sensitivity analysis and mechanism optimization, in addition, through real-time coupling sensor data and simulation calculation, the abnormal emission trend can be pre-judged in advance, and a feedforward control basis is provided for the ammonia injection amount, the EGR rate and the ignition angle.

The utility model discloses an electric field combustion-supporting jet ignition device and an ammonia fuel engine, and relates to the technical field of internal combustion engines, the electric field combustion-supporting jet ignition device comprises a jet device, an auxiliary electrode, a spark plug and an ammonia sprayer, the jet device comprises a jet device main body and a jet nozzle, and the jet device main body is connected with the jet nozzle to form a pre-combustion chamber; the pre-combustion chamber is communicated with the main combustion chamber; the auxiliary electrode comprises a pre-combustion chamber auxiliary electrode and a main combustion chamber auxiliary electrode, the auxiliary electrode is connected with the control unit through an electrical circuit, and an electric field is formed in the pre-combustion chamber and the main combustion chamber; the spark plug is electrically connected with the control unit through an electrical circuit; and the ammonia spraying device is used for spraying ammonia gas into the pre-combustion chamber through a nozzle outlet of the ammonia spraying device, the ammonia gas is fully mixed with air in the pre-combustion chamber, the mixed gas is ignited at an ignition electrode of the spark plug under the action of an electric field, and the ammonia mixed gas in the main combustion chamber is ignited. Electric field combustion supporting is applied to the jet ignition device, and the combustion reaction rate and the flame propagation speed are increased.

The invention belongs to the technical field of coal mine safety research, and discloses a fuel-rich gas coal dust explosion residual gas secondary explosion test device which comprises a primary explosion container and a secondary explosion container, the primary explosion container is communicated with the secondary explosion container through a three-phase valve, and the three-phase valve is communicated with a gas sample bag; the pulverized coal spreading system comprises a first spreading machine and a second spreading machine which are fixedly arranged at the bottoms of the primary explosion container and the secondary explosion container in a penetrating manner respectively; the gas supply system comprises a premixing tank which is communicated with the primary explosion container and the secondary explosion container; and the image acquisition system comprises a first camera and a first infrared thermal imager which are arranged corresponding to the first explosion container, and a second camera and a second infrared thermal imager which are arranged corresponding to the secondary explosion container. According to the invention, the research on the flame propagation dynamic characteristic evolution mechanism under the influence of multiple parameters of fuel-rich gas coal dust explosion and residual gas explosion is realized, the experimental error is reduced, and the research cost is reduced.

The invention discloses a staged cracking ammonia internal combustion engine system which comprises an ammonia supply system, a first-stage catalytic cracker and a combustion chamber, the combustion chamber is connected with an air inlet channel and an exhaust channel, and a spark plug is installed on the combustion chamber; the ammonia supply system is used for providing low-pressure gaseous ammonia, the ammonia supply system is connected with an inlet of the first-stage catalytic cracker, and an outlet of the first-stage catalytic cracker is connected with the gas inlet channel; the first-stage catalytic cracker is connected with the exhaust passage through an exhaust branch pipe, a low-temperature catalyst for catalyzing ammonia to be decomposed into hydrogen and nitrogen is arranged in the first-stage catalytic cracker, and the inner wall of the combustion chamber is coated with a second-stage ammonia catalyst coating. Staged ammonia cracking is carried out at low temperature and high temperature, a small amount of ammonia is decomposed by the first-stage catalytic cracker to generate hydrogen, the ignition energy of the ammonia can be remarkably reduced by the small amount of hydrogen, and the flame propagation speed of ammonia combustion is increased; the secondary cracking in the combustion chamber efficiently decomposes ammonia through a catalyst coating, so that the oxidation rate and the combustion efficiency of ammonia are improved, and the emission of unburned ammonia is reduced.

The invention discloses a method for predicting the explosion intensity of a steam cloud based on a flame velocity. The method comprises the following steps: constructing a flame propagation prediction formula by integrating factors such as a gas cloud limitation degree, obstacle blockage, steam cloud activity and a flame propagation distance; collecting data in different scenes for fitting analysis, and determining values of undetermined parameters in the flame propagation prediction formula in different scenes; solving a flame propagation prediction formula to obtain a dimensionless flame velocity based on the value of the undetermined parameter in the target scene, and determining an actual flame velocity in combination with the sound velocity; based on the determined actual flame speed, predicting the explosion overpressure through a relational expression between the actual flame speed and the explosion overpressure established in the target scene; based on the predicted explosion overpressure, the explosion impulse is predicted through a relational expression between the explosion overpressure and the explosion impulse established in the target scene; and representing the explosion intensity of the steam cloud based on the predicted explosion overpressure and explosion impulse. The method is simple in process, high in reliability and wide in application range.

This application relates to the field of kitchen appliance technology, and more particularly to an inner ring burner cap and a gas stove. The inner ring burner cap has an inner ring cavity; ignition holes and flame-preserving holes, respectively communicating with the inner ring cavity, are formed on the side walls of the inner ring burner cap. The ignition holes are configured opposite to the ignition needle, and the flame-preserving holes are configured opposite to the thermocouple; a main burner hole, communicating with the inner ring cavity, is provided at the top of the inner ring burner cap; an ignition groove, communicating with the inner ring cavity, is formed on the outer side wall of the inner ring burner cap, arranged around the axis of the inner ring burner cap, and located between the outlet of the flame-preserving hole and the outlet of the main burner hole. The ignition groove on the inner ring burner cap facilitates the upward propagation of the flame at the flame-preserving hole to form a flame at the main burner hole, enabling the inner ring burner cap to achieve rapid and stable flame propagation, thus improving the user experience.

This application provides a flame-retardant silicone and its preparation method. In this flame-retardant silicone, through the synergistic effect of boron-containing polysiloxane prepolymer and functionalized boron nitride, the flame-retardant silicone has an afterflame time of ≤5s at 800℃, an oxygen index of ≥36%, and has passed UL94V-0 certification. It can quickly form a ceramic barrier layer at high temperatures, effectively preventing flame propagation. The helical structure of the siloxane main chain, combined with the reinforcing effect of functional fillers such as nano-fumed silica, low-melting-point glass powder, and activated inorganic smoke suppressant and flame retardant, makes the tensile strength of the flame-retardant silicone ≥45N, and the permanent tensile modulus retention rate ≥85% under 125% radial shrinkage, exhibiting excellent tear resistance. This flame-retardant silicone is suitable for applications requiring high flame-retardant performance, such as new energy cables and electronic device protection.

This utility model discloses a high-efficiency flame-arresting and explosion-proof valve suitable for dusty gas environments, including a valve body, a valve disc, a counterweight device, and a self-locking device. The valve body includes a valve shell and a top cover plate. Inlet flanges and outlet flanges are provided on the left and right sides of the valve shell. The inner side of the inlet flange extends into the valve body and is equipped with a rubber ring. The upper side of the valve disc is welded to a rotating shaft via a rotating arm. The two ends of the rotating shaft are rotatably connected to the valve body via bearings. The counterweight device includes a counterweight, a slender rod, and a stop rod. The self-locking device is a combination of a spring pin and a locking switch. In the event of an explosion, the high-efficiency flame-arresting and explosion-proof valve provided by this utility model closes the valve disc and is locked by the self-locking device, effectively cutting off the propagation path, achieving flame arrest and explosion isolation, preventing the propagation of shock waves and flames generated by the explosion, effectively preventing secondary and multiple explosions, and effectively protecting the safety of personnel and upstream equipment.

The invention discloses a zero-low-carbon fuel combustion device based on catalytic heat surface combustion supporting and a control method thereof, and relates to the technical field of aviation power equipment.The zero-low-carbon fuel combustion device based on catalytic heat surface combustion supporting comprises a glow plug suitable for being installed on the wall face of a combustion chamber of an engine and stretching into the combustion chamber of the engine; the protective cover is arranged on the radial outer side of the glow plug, a cavity is formed between the inner circumferential surface of the protective cover and the outer circumferential surface of the glow plug, catalyst layers are arranged on the inner circumferential surface of the protective cover and the outer circumferential surface of the glow plug, a first opening communicated with the cavity is formed in the protective cover, and the first opening comprises a plurality of sub through holes formed at intervals; a second opening is formed between the protective cover and the glow plug; and the injector is suitable for injecting fuel into the first opening. The zero-low-carbon fuel combustion device based on catalytic heat surface combustion supporting has the advantages of being capable of achieving the zero-low-carbon target conveniently, good in ignition performance, high in flame propagation performance, long in service life and the like.

The utility model relates to a multi-sparking plug ignition system, combustion chamber and gas engine, multi-sparking plug ignition system includes precombustion chamber and second sparking plug, precombustion chamber is provided in dome structure center, precombustion chamber is provided with first sparking plug, precombustion chamber is provided with a plurality of jet orifice at interval along the circumference, second sparking plug is provided with second sparking plug. At least one spray hole points to a high-frequency detonation area near an exhaust throat of an exhaust passage in the combustion chamber, the second spark plug and the pre-combustion chamber are arranged between the air inlet passage and the exhaust passage in a spaced mode, and the second spark plug is close to the edge of the dome structure. The high-speed jet jetted by the pre-combustion chamber in the multi-spark-plug ignition system enables flame to reach the edge of the combustion chamber as soon as possible, and the second spark plug can accelerate combustion in the nearby space, so that the multi-spark-plug ignition system can effectively improve the flame propagation speed, shorten the time for the flame to propagate to the edge of the combustion chamber and improve the combustion efficiency. Flame can reach the edge of a combustion chamber of an engine as soon as possible, and the aim of reducing the knocking tendency is achieved.

The application discloses a kind of multi-stage linkage explosion venting test methods combined with powdery combustion inhibitor, it is related to explosion-proof engineering and safety detection technical field;The method is by constructing with explosion venting device, ignition system, powdery inhibitor delivery system and pressure and optical sensor test cabin, uses PLC to realize ignition, pre-delivery, pressure relief trigger, synchronous inhibition and afterflame inhibition and so on multi-stage linkage control;And through pressure, temperature and flame sensor real-time acquisition of multi-dimensional data of explosion process;By before ignition, ignition instant and in the process of pressure relief with different doses of powdery inhibitor, the explosion suppression performance under different linkage strategies can be systematically evaluated;The application can simultaneously obtain peak pressure, pressure rise rate, flame propagation speed and re-burning conditions and other multi-parameters, realize the quantitative evaluation of the explosion suppression efficiency of powdery combustion inhibitor under multi-stage linkage explosion venting conditions, with the advantages of good data integrity, strong repeatability and suitable for standardization explosion-proof test method construction.

The present application belongs to the field of afterburner design, and is an asymmetric afterburner internal step ignition structure, comprising a cone, a support plate and an ignition nozzle; an annular step ignition zone is provided in the middle of the cone, and the step ignition zone comprises a first step zone, a transition zone and a second step zone. During the ignition process of the afterburner, the fuel passes through the fuel nozzle in the first step zone through the casing and the support plate into the interior of the step, and is ignited by the ignition nozzle located at the center of gravity of the first step zone. The oil-gas mixture is first ignited and burned in the first step zone. Since the step angle of the first step zone is 90°, it can produce an obvious sudden expansion effect on the airflow, thereby constructing a stable recirculation zone, and at the same time has excellent flame propagation characteristics. The flame quickly propagates to the transition zone and the second step zone. The setting of the transition zone can make the vortex formed in the first step zone during the flame transfer more stable and will not fall off, thereby realizing fast and reliable ignition of the afterburner.

The utility model discloses a dry-type flame arrester for a coal mine gas conveying pipeline, which relates to the technical field of flame arresting of the coal mine gas conveying pipeline and comprises a shell component, a flame arresting part and a fastener. Through the combined design of the fire-retardant sleeve, the stainless steel wire mesh and the corrugated plate type fire-retardant disc, flame propagation can be effectively blocked, and gas explosion accidents are prevented; the flame arrester adopts the design of the shell assembly and the flame arresting part which are in mirror symmetry, is convenient to install and maintain, and ensures the stability of the structure through the connection of a fastener; the flame arrester is suitable for gas conveying pipelines with different pipe diameters, can meet the use requirements under different pressure conditions, and is wide in application range; when the gas passes through the flame arrester at the average flow speed of 15m / s, the pressure drop is less than or equal to 1kPa, so that the gas conveying efficiency is not influenced; in conclusion, the dry type flame arrester provided by the utility model can effectively solve the explosion problem in a coal mine gas conveying pipeline, insulates flame propagation, ensures the production safety of a coal mine, and has a wide application prospect.

The application provides a hydrogen-doped natural gas explosion characteristic experiment device in a confined space, which comprises a pipeline system and a gas distribution system, the pipeline system comprises a driving pipe, a visible pipe and a test pipe arranged in sequence, the gas distribution system comprises a vacuum pump, an electric control valve group and a gas cylinder pipeline connected with each electric control valve in the electric control valve group, and the gas distribution system is connected with the driving pipe through a gas inlet. The hydrogen-doped natural gas explosion accident characteristic evolution and inhibition experiment of different hydrogen proportions can be carried out, and important characteristic parameters in the deflagration and detonation flame propagation process of the hydrogen-doped natural gas can be recorded.

The application belongs to the technical field of fireproof and heat-insulating glass, and particularly relates to a fireproof and heat-insulating glass and a preparation process thereof, which comprises assembling frames, a glass body, reinforcing plates and fireproof and heat-insulating sponges, wherein the assembling frames are provided in pairs, the glass body is clamped on the inner walls of the assembling frames, the reinforcing plates are arranged between the two assembling frames and are connected through the reinforcing plates, and the fireproof and heat-insulating sponges are installed on the reinforcing plates; special tempered glass or fireproof glass is selected as a base material, the strength of the glass plate can be maintained at high temperature, the glass plate is subjected to mechanical processing and edge grinding treatment, the safety and compatibility of the component are ensured, the developed fireproof and heat-insulating sponge material has excellent heat-insulating property, can protect the structure from high temperature, adopts a hollow sandwich design to block heat and flame propagation, improves the fireproof performance, forms a closed system preventing smoke penetration through edge sealing and surface reflection coating, effectively reduces heat transfer, and realizes efficient heat insulation.

The invention relates to the technical field of kraft linerboards, in particular to a flame-retardant kraft linerboard and a surface treatment process thereof. An upper transition layer is arranged below the upper surface layer, a core layer located on a middle base layer of the kraft linerboard is arranged below the upper transition layer, a flame-retardant layer for inhibiting combustion reaction and reducing flame propagation speed through a flame retardant is arranged in the core layer, and a lower transition layer is arranged below the core layer. A lower-layer surface layer which is symmetrical with the upper-layer surface layer and is positioned on the outermost layer of the bottom of the kraft linerboard is arranged below the According to the flame-retardant kraft linerboard, a layered composite structure is adopted, the upper transition layer and the lower transition layer are additionally arranged, the binding force between the layers is enhanced, the layering phenomenon is effectively avoided, the overall strength and durability of the kraft linerboard are greatly improved, the flame-retardant layer adopts a multi-layer composite structure and gradient flame-retardant design, and the flame-retardant efficiency is improved; according to the process, the flatness, glossiness and printing stability of the paperboard are ensured, the quality of a finished product is stable, the defective rate is reduced, and the production efficiency and economic benefits are improved.

The application relates to a combustion and explosion risk prediction method and device based on a working condition self-adaptive fractal dimension, and particularly relates to the technical field of combustion and explosion safety. The method comprises the following steps: firstly, acquiring environment monitoring data and space structure data of a closed space; then, determining a flow field working condition in the closed space according to the environment monitoring data and the space structure data, the flow field working condition being used for determining a fractal dimension and a flame acceleration critical radius, the fractal dimension and the flame acceleration critical radius being self-adaptive to the turbulent intensity of the flow field working condition; using an overpressure prediction model to determine a combustion and explosion overpressure prediction result of a combustible mixture in the closed space according to the fractal dimension and the flame acceleration critical radius; and finally, determining a combustion and explosion risk grade corresponding to the closed space according to the combustion and explosion overpressure prediction result. The application can self-adaptively determine the flame propagation characteristics corresponding to the fluid working condition, predict the combustion and explosion overpressure, and further improve the combustion and explosion overpressure prediction accuracy.

A method and apparatus for operating a flare stack pilot with a fuel having a high flame speed includes a structure which is operable to recirculate products of combustion to be mixed with the incoming fuel to dilute the incoming fuel to reduce the flame speed of the resulting mixture.

The application discloses a kind of multi-phase mixture laminar flow flame burning rate measuring device and measuring method, the measuring device includes reaction shell, liquid atomization module, gas supply module, gas-liquid mixing module, rectifier nozzle module, ignition module and optical measurement module, reaction shell has the reaction cavity for gas-liquid mixing;Liquid atomization module is used to gather liquid fuel, and liquid fuel is atomized to form droplet;Gas supply module is used to control the flow and direction of gas into reaction cavity;Gas-liquid mixing module is arranged in reaction cavity, including the flow guide baffle for forming buffer space;Rectifier nozzle module includes rectifier unit and nozzle unit, rectifier unit is used to weaken flow field disturbance, and nozzle unit is used to output gas mist two-phase mixture fluid;Ignition module is used to ignite the gas mist two-phase mixture ejected;Optical measurement module is used to obtain flame propagation data.The measuring device can realize the accurate measurement and analysis of multi-phase mixture combustion process.

The invention relates to an experimental device and method for preventing a quadratic type cloud explosive bomb from fire channeling. The device comprises a cloud explosive bomb main body which is a hollow pipe containing central initiating explosive and cloud explosive fuel, an upper end opening is detachable, and a plurality of notch grooves are distributed in the inner side wall of the cloud explosive bomb main body. The central tube is filled with the porous material, the inert explosion suppression dust is uniformly dispersed in pores of the porous material, and explosion flame propagation of the central initiating explosive is inhibited under the combined action of the porous physical structure and the chemical explosion suppressant, so that the fire channeling phenomenon is prevented. The center initiating explosive is tightly connected with the detonator, and the detonator is fixed through a center initiating detonator plug. And the ignition delay system is used for controlling the initiation time sequence of the central primer detonator and the secondary primer detonator. The method can prevent the fire channeling phenomenon of the cloud explosive bomb, so that the damage power of the cloud explosive bomb is improved, and the method has the advantages of being simple in process, easy to operate, low in cost and suitable for batch production.

The present application relates to a kind of powder starting test device, solve the existing powder starting test bench cannot simulate high altitude low pressure environment, and powder starting test needs to be completed in dependence on whole machine test and on high altitude test stand, lead to test cost is high, research cycle is long and cannot early obtain component performance and flame propagation law Problem.It includes closed box, air pump, air pump, temperature measuring device, flame generator, barometer and multiple groups of cameras;Pressure in closed box is adjusted by air pump and air pump cooperation, simulate different altitude environment;Temperature measuring device can move along horizontal direction, temperature distribution in flame field is inducted by grid-like temperature indicating paint, cooperate multiple groups of cameras to capture flame range and propagation distance, realize the accurate test of the combustion performance of powder starting device under different altitude environment.The present application is compact in structure, convenient to operate, low in test cost, short in cycle, can early obtain key performance data, provide reliable support for the optimization design of powder starting device.

A flame mitigator for a container includes a plurality of wire portions reticulated to define a plurality of spaces therebetween and form a body having a substantially dome-shaped profile extending along a longitudinal axis between a first end and an opposite second end, and a rim positioned adjacent the first end and defining an opening of the body. The plurality of spaces collectively provide an openness of the opening to inhibit flame propagation along a fluid stream from entering into the container. The flame mitigator further includes a projection extending radially outward from the rim and defining a periphery of the body, and a well extending radially inward and longitudinally away from the rim to the second end. The projection is elastically deformable and configured to deflect relative to the rim.

This invention provides a combustion chamber head device and ignition method for a pure hydrogen gas turbine. It relates to the field of gas turbine combustion chamber design, solving the problem of unreliable ignition in existing pure hydrogen combustion chambers. The device includes: a fuel distribution component, a multi-cluster burner, and a base; the multi-cluster burner includes a central combustion cluster and multiple interconnected combustion clusters surrounding the central combustion cluster; the multiple interconnected combustion clusters are divided into N-stage combustion chambers; the fuel distribution component includes a central fuel pipe and N-stage interconnected fuel pipes; each stage of interconnected fuel pipes is isolated from each other and from the central fuel pipe; the central fuel pipe is connected to the top of the central combustion cluster; each stage of interconnected fuel pipe is connected to the top of its corresponding combustion chamber; the bottom ends of the central combustion cluster and the N-stage combustion chambers are respectively connected to the base. This invention provides reliable start-up, stable operation, and low emissions over wide loads, achieving multi-cluster interconnection and reliable flame propagation, significantly improving ignition success rate and combustion stability.

The application provides a flame speed and quenching distance testing device and testing method, and belongs to the technical field of combustion testing. The testing device comprises an annular sleeve, a fuel delivery assembly, a central fixed shaft and a plurality of circular ring pieces. The first end of the annular sleeve and the output end of the fuel delivery assembly are in communication. The plurality of circular ring pieces are sequentially mounted on the central fixed shaft along the axial direction of the central fixed shaft. The outer diameters of the plurality of circular ring pieces increase sequentially from the first end to the second end. A first micro-hole for placing a sensor is arranged on the inner ring surface of the circular ring piece. A through hole extending along the axial direction is arranged in the central fixed shaft, and the through hole is used for penetrating the sensor wire harness and for introducing cooling water. A second micro-hole corresponding to the first micro-hole is arranged on the central fixed shaft. The fuel delivery assembly is connected to the annular sleeve and the central fixed shaft for delivering fuel therebetween. The application can simultaneously measure the laminar flame propagation speed and quenching distance of a given mixed gas in one experiment.

The invention provides a lithium ion battery, a preparation method thereof and electric equipment comprising the lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium ion battery comprises a positive plate, a negative plate, a diaphragm and electrolyte. The diaphragm is of a three-layer composite structure and comprises polar polymer fiber layers located on the two sides and a thermal turn-off functional layer clamped between the polar polymer fiber layers. According to the lithium ion battery disclosed by the invention, under a high-temperature condition, the polar polymer fiber layer can maintain the structural integrity of the diaphragm and improve the wettability of an electrolyte, and the thermal shutdown functional layer is heated to be softened or molten to block micropores, so that rapid closing of an ion channel can be realized, internal current can be cut off, and thermal runaway spreading can be prevented; meanwhile, the flame retardant in the electrolyte is decomposed at a high temperature to generate a free radical trapping agent, so that the free radical chain reaction in the combustion process is effectively interrupted, and flame propagation is inhibited. Therefore, through the synergistic effect of the composite diaphragm and the flame-retardant electrolyte, the battery disclosed by the invention can be fully applicable to the fields of power and energy storage with high safety requirements.

Combustion system comprising: an injection device (40) configured to inject fuel into a combustion chamber (38) of an engine (91, 92); a spark plug (50) configured to perform ignition (I) of the fuel in the combustion chamber; and a normal control unit (65) configured to perform normal control (α) to cause the injection device to perform a predetermined normal injection (F), and subsequently to cause the spark plug to perform ignition, wherein in a predetermined delay range (D) in the combustion chamber the propagation of the flame (P) is further delayed than in any other range when normal control is performed, and in a knocking condition auto-ignition occurs in the fuel in the delay range when normal control is performed, the combustion system further comprising: an adjustment control unit (66),which is configured to perform a predetermined adjustment control (β) when the knock condition is established in order to suppress auto-ignition, wherein the adjustment control does the following: cause the injector to perform a predetermined main injection (Fm) and subsequently perform a predetermined partial injection (Fs) in a second half of a compression stroke to adjust fuel distribution in the combustion chamber to facilitate flame propagation (P) into the retardation region further than with normal injection, and subsequently cause the spark plug to perform ignition.

The invention relates to a rotating sliding arc plasma atomizing nozzle, and belongs to the technical field of combustion chambers. One end of an anode shell is connected with an air inlet structure and used for air inlet, and one end of an oil pipe arranged on the side face of the anode shell is connected with the side face of a cathode connector; the anode shell is matched with the cathode connector to generate plasma sliding arc; one end of the cathode connector is connected with the air inlet structure through a cathode connecting rod, and the other end of the cathode connector is connected with the atomizing nozzle; and the cathode connector, the atomizing nozzle and the oil pipe are communicated in sequence to convey a medium to the atomizing nozzle for atomization. The nozzle is simple in structure and high in universality, the size and flow distribution are compatible with those of a traditional nozzle, and direct replacement can be achieved. Fuel oil is cracked into small molecular fuel by plasma arc, and fuel oil drop particles are refined to reduce the spray particle size, so that the combustion efficiency and the flame propagation speed are remarkably improved, and the combustion range is effectively widened.

The utility model belongs to the technical field of vehicles, and discloses a pre-combustion chamber structure, an engine and a vehicle, the pre-combustion chamber structure comprises a pre-combustion chamber main body, the pre-combustion chamber main body comprises an injection part, a communication part and a mixing part which are communicated in sequence, the injection part is provided with a containing cavity, the bottom of the containing cavity is provided with a protrusion, the injection part is provided with an injection hole, and the injection hole is communicated with the communication part. The side wall, close to the protrusion, of the spray hole and the other side wall, close to the communicating part, of the spray hole are in smooth transition connection with the inner side wall of the protrusion and the inner side wall of the communicating part correspondingly, when an engine is in a compression stroke, the flowing resistance of fresh air entering the precombustion chamber body is reduced, the movement speed of airflow is increased, and therefore the turbulence energy of the precombustion chamber body is enhanced, and the combustion efficiency is improved. When an engine is in an expansion stroke, under the action of the protrusions, energy loss is reduced after high-temperature flames which rapidly expand impact the high-temperature flames, the high-temperature flames rapidly enter the spraying holes, and therefore the energy of sprayed jet flow is improved, the jet flow flame propagation speed of the pre-combustion chamber body is increased, and efficient and stable ignition of the pre-combustion chamber structure is achieved.

The utility model discloses a kind of explosion-proof fan, including the casing of three-layer composite explosion-proof resin material and wind wheel, wherein outer layer carbon nanotube PEEK composite material effectively leads out static electricity, middle aluminium hydroxide flame-retardant layer prevents flame spread, inner layer ultra-high molecular weight polyethylene reduces friction spark risk.Electrostatic belt can effectively eliminate static electricity accumulation in transmission process, avoid static spark, improve explosion-proof safety.Fan is equipped with rotary electrostatic brush and ground copper wire to eliminate static electricity, and fire barrier is configured at air inlet to prevent flame propagation.Wind wheel blade is provided with tungsten-containing wear-resistant coating and zircon ceramic wear-resistant strip to avoid friction spark.Explosion-proof motor is built-in temperature sensor and vibration sensor, and stator winding adopts arc-resistant enameled wire.The utility model solves the problem of heavy weight and single protection of traditional fan through multiple explosion-proof design, with the characteristics of lightweight, superior explosion-proof performance, stable and reliable operation, especially suitable for flammable and explosive places such as petroleum and chemical industry.