114 results about "Ignition delay" patented technology

The invention discloses a turbulent combustion characteristic prediction method, device, equipment and medium, and aims to rapidly and accurately predict hydrocarbon fuel turbulent combustion characteristics, the turbulent combustion characteristic prediction method comprises the following steps: constructing a three-step reaction mechanism, the three-step reaction mechanism comprises a first reaction mechanism using hydrocarbon fuel and oxygen as reaction fuels; a second reaction mechanism using carbon monoxide and oxygen as reaction fuels; a third reaction mechanism in which hydrogen and oxygen are used as reaction fuels; a three-step reaction mechanism is carried out by taking hydrocarbon fuel as fuel through a zero-dimensional isobaric flame model, the highest temperature during complete combustion of the hydrocarbon fuel is determined as adiabatic equilibrium temperature, and the maximum value point of the temperature change rate in the combustion process of the hydrocarbon fuel is determined as ignition delay; the laminar flame velocity is determined according to the index relationship between the reaction pressure and the laminar flame velocity through a three-step reaction mechanism by taking hydrocarbon fuel as fuel through a one-dimensional isobaric flame model.

The invention provides a method and device for predicting ignition delay time in the self-ignition process of a compressible flow field, and relates to the technical field of aircraft ignition prediction.The method comprises the steps that the initial local temperature of the interior of a hypersonic aircraft engine before self-ignition operation is monitored in real time; self-ignition simulation is carried out through pre-selected combustion characteristic parameters of a high-compressibility combustion field, and in the self-ignition simulation process, the ignition delay time of the hypersonic aircraft is predicted based on the initial local temperature and the pre-selected combustion characteristic parameters of the high-compressibility combustion field. According to the method, the ignition delay time can be accurately predicted before ignition, so that the combustion process after ignition is better controlled, and the problems of unstable combustion and the like are reduced.

The invention relates to the technical field of energy and combustion, in particular to an energetic metal ignition delay and combustion temperature calculation method and system.The method comprises the steps that initial parameters used for calculating the ignition delay and combustion temperature of energetic metal are set; original spectral data of the energetic metal in the combustion process are obtained in real time and preprocessed; constructing an ignition delay calculation model, and calculating the ignition delay time of the energetic metal; performing multi-method fitting on the spectral data of the selected wavelength interval based on the Planck law, constructing a combustion temperature calculation model, and calculating the combustion temperature; and according to real-time feedback, the sampling frequency is dynamically adjusted, the step length is calculated, and calculation results of ignition delay time and combustion temperature are output. According to the method, the problems that in the prior art, experimental determination of the ignition delay and the combustion temperature of the energetic metal is complex, long in consumed time, large in error and poor in universality are effectively solved, and real-time accurate calculation of the ignition delay and the combustion temperature of the energetic metal is achieved.

To provide a combustion apparatus (10) capable of accurately detecting deterioration of a flame rod (15).SOLUTION: When ignition of a burner (120) is detected, deterioration of a flame rod is determined on the basis of a current value of a flame current for a deterioration determination period after the detection of the ignition. An effect of the deterioration of the flame rod appears in the current value of the flame current for the deterioration determination period after the detection of the ignition. The current value of the flame current is hardly affected by disturbance compared to an ignition delay time, and a variation of measurement results is small. Thus if the deterioration of the flame rod is determined on the basis of the current value of the flame current in the deterioration determination period after the detection of the ignition, the deterioration of the flame rod can be detected accurately.SELECTED DRAWING: Figure 4

The invention discloses liquid hydrocarbon fuel combustion equipment and a supercritical carbon dioxide circulation system, the liquid hydrocarbon fuel combustion equipment comprises a nozzle, a combustion chamber and a rotational flow assembly, the rotational flow assembly comprises a first-stage pipe, a second-stage pipe, a first-stage cyclone, a second-stage cyclone and a third-stage cyclone, and the first-stage pipe and the second-stage pipe are both scaling venturi pipes. The supercritical carbon dioxide circulation system comprises fuel supply equipment, pure oxygen supply equipment and a circulation assembly, mixed gas of carbon dioxide and water vapor generated by combustion of the liquid hydrocarbon fuel combustion equipment is circulated through the circulation assembly to obtain high-purity carbon dioxide, and the high-purity carbon dioxide is divided into three paths to flow into a first-stage swirler, a second-stage swirler and a third-stage swirler; the carbon dioxide flowing into the second-stage cyclone is uniformly mixed with oxygen from pure oxygen supply equipment before flowing into the second-stage cyclone. The combustion ignition delay period and the mixing time can be prolonged, a standing vortex high-temperature rapid reaction area is formed, the problem that the combustion speed is low in the concentrated carbon dioxide atmosphere is solved, and the supercritical carbon dioxide circulation efficiency is improved.

The present invention is a magnetically powered electrically controlled solid propellant combustion performance test system and method. It includes a support frame, an ignition device, a magnetic sheet, an electromagnet, a PD stress control integrated module, a data acquisition subsystem and a PC terminal; a magnetic sheet is connected below the ignition device, and a PD stress control integrated module is arranged below the ignition device, and an electromagnet is arranged thereon. The PD stress control integrated module regulates the current to make the force between the ignition device and the electromagnet constant, thereby pushing the ignition device electrically controlled solid propellant to slide and maintaining dynamic contact between the propellant and the positive and negative electrodes. The present invention is suitable for testing electrically controlled solid propellants of various systems. The parameters of the entire area of ​​the system can be modulated by the PC terminal, and the combustion performance of the electrically controlled solid propellant, such as multi-stage ignition delay time, energy required for ignition, dynamic burning rate, dynamic current, burning rate adjustable ability with electricity, combustion temperature, flame structure morphology and flameout delay time, can be diagnosed simultaneously.

The invention belongs to the technical field of engines, discloses a methanol engine combustion system, a control method and a methanol engine, and realizes more stable combustion during cold start and low-load working condition operation of the methanol engine through a glow plug; alpha is limited to be smaller than beta, and the vortex motion direction in the combustion chamber is the piston circumferential direction from the first reference surface to the second reference surface and passing through the preset plane, so that methanol injected into the combustion chamber through the methanol injection hole corresponding to the first reference surface can be guided by the vortex motion in the combustion chamber, and the methanol can be injected into the combustion chamber. The ignition time of the methanol injected into the combustion chamber from the methanol injection hole corresponding to the first reference surface by the glow plug is shortened, namely, the ignition delay period of the methanol is shortened; and then flame generated by combustion of methanol ignited by the glow plug is utilized to sequentially ignite methanol injected into the combustion chamber from other methanol injection holes, so that controllable combustion of direct injection methanol in the cylinder is realized.

The invention relates to a method for testing the combustion dynamic performance of block refractory metal, and belongs to the technical field of material performance testing. A block refractory metal sample is clamped and placed in the quartz tube; a laser transmitter and a high-speed camera are arranged outside the quartz tube; introducing gas from the bottom of the quartz tube along the circumferential direction; starting a laser emitter to emit laser to burn the sample, and recording the whole burning process through a high-speed camera; and quantitatively acquiring a performance index for evaluating the combustion dynamics of the refractory metal according to a result of the high-speed camera. By adopting a flaky sample with the thickness of 0.05-2 mm, ignition and self-sustaining combustion of block refractory metal in a laboratory environment can be achieved, and the combustion dynamic performance such as ignition delay time, combustion critical oxygen concentration, self-sustaining combustion line combustion speed and self-sustaining combustion volume combustion speed of the block refractory metal can be obtained; the method can be used for evaluating the combustion performance of the energetic structure material and selecting the energetic structure material.

The invention relates to the technical field of aero-engines, and discloses a combustion chamber with an adjustable air entraining structure, the combustion chamber comprises a cartridge receiver structure, the air entraining structure and an adjusting structure, the cartridge receiver structure comprises a first cartridge receiver and a second cartridge receiver, the first cartridge receiver and the second cartridge receiver are connected with each other and jointly define a mounting cavity, and the first cartridge receiver is provided with a first communication part and a second communication part; the air entraining structure is provided with a communicating cavity, the communicating cavity is provided with a first opening, a second opening and a third opening, the first opening communicates with the first communicating part, the second opening communicates with the second communicating part, and the third opening communicates with the engine; the adjusting structure comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly covers the first communicating part and is arranged on the first casing, and the second adjusting assembly covers the second communicating part and is arranged on the first casing; ignition delay and flameout of the auxiliary power device in a small state are avoided, low-frequency excitation of the flame tube in a large state is avoided, and performance degradation of the combustion chamber in an intermediate value state is avoided.

The purpose of the present invention is to achieve both the assurance of combustion stability in an internal combustion engine and the suppression of PN during operation in a catalyst warm-up mode accompanied by an ignition retard. A control device 150 is fora fuel injection device 101 which directly injects a fuel into a cylinder 615 of an internal combustion engine 10 operating in a catalyst warm-up mode for warming up a catalyst by using an ignition retard for retarding an ignition timing until an expansion stroke. The control device 150 performs the fuel injection immediately before the ignition timing in an expansion stroke among a plurality of fuel injections performed during one combustion cycle during the operation in the catalyst warm-up mode, and controls the fuel injection device 101 so that the injection amount of the fuel injection immediately before the ignition timing becomes smaller as the ignition timing is retarded.

The invention provides an embedded multifunctional plasma flame stabilizer, and relates to the technical field of plasma ignition combustion supporting. The embedded multifunctional plasma flame stabilizer comprises an evaporative flame stabilizer and an embedded exciter, wherein the evaporative flame stabilizer is provided with a combustion area defined by apron boards; the embedded exciter is installed on the surface, facing the combustion area, of the apron board. The exciter is directly integrated on the inner side of the skirt board of the flame stabilizer, and the space utilization rate and the system integration degree are improved on the premise that the aerodynamic configuration and the installation mode are not changed. The discharge area of the exciter covers the backflow area, active free radicals can be generated and local heat can be released under complex and changeable conditions, the reaction activity of mixed gas is enhanced, the ignition delay time is shortened, the ignition boundary is expanded, meanwhile, atomization and mixing are improved, the combustion efficiency is improved, and flame quenching is restrained. The device has ignition assistance, continuous excitation and active thermochemical regulation and control capabilities, and is suitable for a compact combustion chamber environment.

The present invention discloses a method for predicting the ignition of a scramjet combustion chamber, belonging to the technical field of ignition prediction. The method comprises the following steps: numerically simulating the combustion chamber using a three-dimensional density-based steady-state injection; determining whether convergence conditions have been met; extracting flow field data of the combustion chamber after convergence; and calculating the residence time t of aviation kerosene microclusters in the ignition region based on the flow field data. z ; Calculate the ignition delay time t of the ignition area based on the flow field data c Calculate Da in the ignition area. Predict ignition conditions based on Da. The scramjet engine combustion chamber ignition prediction method of the present invention calculates Da based on injection field data and predicts ignition success based on the relationship between Da and 1. This helps adjust actual ignition conditions and improve ignition success rates. It can meet the ignition prediction needs of combustion chambers of various configurations.

The invention discloses a micro gas generator homogeneous mixed medicament for a safety belt and a preparation method of the micro gas generator homogeneous mixed medicament, the micro gas generator homogeneous mixed medicament is prepared from the following components in percentage by mass: 90-97% of green gas generating medicament particles and 3-10% of nitrocellulose medicament particles uniformly dispersed in gaps of the green gas generating medicament particles, and the sum of the mass percentages of the components is 100%. By utilizing the advantages of high combustion speed and low ignition threshold of the nitrocellulose agent, the ignition delay and the combustion period of the mixed agent are shortened, the exposure time of the safety belt elbow in a high-temperature environment is shortened, the structural strength of the safety belt elbow is ensured, the problem of elbow explosion in a bonfire test is finally solved, and meanwhile, the environment-friendly characteristic of a green gas-producing agent is reserved; in addition, through the two-time charging process of the automatic production line, the mixed charging efficiency is high, and the product consistency is good.

The invention discloses an energetic material, a preparation method thereof and application of the energetic material as an initiating explosive, an explosive and a pyrotechnic compound. The chemical formula of the energetic material is MC10H18B2N6; wherein M is selected from at least one of Mn, Fe, Co, Ni, Cu, Zn and Cd; the crystal structure of the energetic material belongs to a monoclinic system, and the space group is P21 / n. The obtained energetic material has excellent stability and safety, and is green and environment-friendly. Through experimental determination, the thermal stability is greater than or equal to 120 DEG C, the impact sensitivity is greater than or equal to 40J, and the friction sensitivity is greater than or equal to 240N. Compared with an existing commercial propellant (unsymmetrical dimethylhydrazine), the ignition delay time of the energetic material is equivalent, the defects that fuel and an oxidizing agent are seriously mixed and the combustion efficiency is low are overcome, and the energetic material has important commercial application value in the field of green high-performance energetic materials.

The invention relates to a method for operating a vehicle engine in order to regenerate a solid particle filter in an idle mode, in which a pre-ignition is delayed in such a way that an actual ignition takes place at the point in time when a piston is in a position after top dead center in the direction of rotation of the crankshaft. Meanwhile, the injection time of fuel into the intake air in the combustion chamber of at least one cylinder is shortened, so that the air-fuel ratio lambda is increased by at least 5% from 1.

Provided are an engine control device and a vehicle with which the methane number of LNG fuel can be estimated. The engine control device is capable of using liquefied natural gas as fuel, and is provided with an acquisition unit that acquires an ignition retard control amount for avoiding engine knocking, and an estimating unit that estimates the methane number of the liquefied natural gas on the basis of an index value indicating the acquired ignition retard control amount.

The application provides an improved naphthene hydrocarbon fuel and a low-pressure combustion promoting method thereof, in particular, methylcyclohexane is used as a base fuel, and diethylsilane is added to methylcyclohexane to regulate the ignition temperature and ignition delay time of methylcyclohexane at low pressure. The modified naphthene hydrocarbon fuel obtained by the method has the advantages of stable physical form, no stratification, high heat value, good stability when the fuel is in contact with air at normal temperature and the like, the low-pressure combustion characteristics of the naphthene hydrocarbon fuel are regulated through directional regulation of the combustion base element reaction of the naphthene hydrocarbon fuel, the operation is simple, and the practicability is strong. The application solves the problem of low-pressure regulation difficulty of the hydrocarbon fuel, provides a solution for the low-pressure characteristic regulation of the naphthene hydrocarbon fuel, and provides technical reserves for reliable ignition of advanced aero-engine under low-pressure harsh working conditions.

The application provides a vehicle rollover protection method, device, medium and electronic equipment. When the rollover parameter value of the vehicle meets the preset starting protection task condition on the time axis, the ignition delay duration is calculated, and the time axis is obtained based on the rollover parameter value. When any type of monitoring parameter value on the time axis is greater than the preset monitoring threshold value of the corresponding type, the corresponding type of penetration identifier is set. When the plurality of types are set with the penetration identifier of the respective type, when the ignition delay duration is less than or equal to the preset ignition delay duration threshold value, the ignition instruction of the safety airbag associated with the rollover is generated. Through the multiple feature recognition of the rollover parameter value on the time axis, the ignition instruction of the safety airbag associated with the rollover is determined. Thus, the safe and reliable protection is provided for the passengers when the vehicle rolls over, and the survival rate of the passengers is improved.

The invention discloses a novel non-premixed natural gas ammonia-doped combustor, and aims to realize efficient mixing of fuel gas and air in the natural gas ammonia-doped combustor, reduce the emission intensity of carbon dioxide and nitrogen oxide, and solve the problems of poor ammonia-doped combustion stability of natural gas, large potential safety hazard of the combustor and the like. The device comprises an ammonia gas nozzle, a swirler, a natural gas nozzle, a secondary air nozzle and a nozzle baffle, and the ammonia gas nozzle, the natural gas nozzle and the secondary air nozzle are sequentially arranged from inside to outside and are concentrically arranged in a surrounding mode; the swirler is positioned between the ammonia gas nozzle and the natural gas nozzle; the nozzle baffle is located between the natural gas nozzle and the secondary air nozzle. The fuel mixing efficiency is enhanced through the swirler, the heat load of a combustion high-temperature area is reduced through secondary air, the combustion delay characteristic of ammonia fuel is improved in combination with the flue gas backflow technology, and a novel combustion technology system with the synergistic effect of the swirler and secondary air flue gas backflow is constructed. The invention relates to the technical field of combustion equipment.

The application provides an engine cylinder pressure calculation method and an engine cylinder pressure virtual sensing system. The method comprises the following steps: establishing a hybrid control combustion model of an engine, inputting first parameters for calculation into the hybrid control combustion model, and performing the following calculation in the hybrid control combustion model: calculating in-cylinder temperature and pressure of the engine in a first stage according to the first parameters, calculating instantaneous in-cylinder local turbulent kinetic energy density in a second stage, calculating a burned gas dilution factor according to the first parameters, the burned gas dilution factor reflecting an obstruction effect of inert gas in a combustion chamber of the engine on mixing of active components, calculating a heat release rate after an ignition delay period in a third stage according to the first parameters, a fuel kinetic energy change rate and the burned gas dilution factor, and calculating a curve of engine cylinder pressure changing with a crank angle according to the heat release rate by using a thermodynamic formula.

The invention discloses a method for predicting ignition characteristics of a hydroxylamine nitrate electrically-controlled solid propellant. The method specifically comprises the following steps: step 1, determining redox reaction of a positive electrode and a negative electrode of the propellant according to components of the propellant; step 2, constructing an ignition theoretical model of a propellant based on a free radical reaction; 3, propellant ignition criteria are established, and an equation for solving propellant ignition characteristic parameters is deduced; 4, propellant ignition condition parameters are set; 5, judging whether the propellant generates energy to ignite or not; and 6, after the ignition requirement is met, propellant ignition characteristic parameters are calculated. The method can directly predict the ignition delay time and the energy required by ignition of the nitric acid hydroxylamine electrically-controlled solid propellant, can quantitatively evaluate the ignition characteristics of the propellant, has small error between the prediction result and the actual measurement result, has the advantages of good economical efficiency, high efficiency and the like compared with a test means, and is suitable for popularization and application. And a large amount of test time and trial-and-error cost can be saved.

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 invention discloses an ignition powder and ignition device for a solid rocket engine. The ignition powder comprises an oxidizer (50-70%), a binder (10-30%), a coupling agent (3-10%), and a fuel (10-35%). The ignition powder has a combustion heat of over 6,000 kJ / kg. Furthermore, the ignition powder has lower mechanical sensitivity than commonly used black powder, improving safety during the ignition operation of the solid rocket engine. The ignition device fully covers the combustion end surface of the solid propellant in the solid rocket engine, achieving full-burning surface ignition of the solid propellant and significantly shortening the engine ignition delay time. The thin-layer metal ignition electrode and polymer insulating film used are completely burned out after the ignition powder burns, without negatively impacting the burning surface of the solid propellant.

The invention discloses a device for detecting ignition delay of a spontaneous combustion type propellant based on a chemical titration method, and the device comprises a combustion chamber which is uniformly provided with windows on the outer wall surface of a cylinder; the oxidant storage device is used for accommodating a liquid oxidant; the sample introduction system comprises a fuel tank and an environment gas cylinder, the fuel tank is communicated with a sample introduction pipe through a peristaltic pump, and an outlet of the sample introduction pipe is inserted into the combustion chamber through the top of the combustion chamber; the air pumping system comprises a vacuum pump and is used for pumping the interior of the combustion chamber into a vacuum environment and pumping waste gas generated in the combustion chamber after the experiment is finished; wherein the peristaltic pump is used for controlling fuel in the fuel tank to drop into an oxidant in the oxidant storage device in a titration manner through the sample injection pipe, so that ignition is realized, and the ignition delay state of the spontaneous combustion type propellant is observed. The device solves the problem that an existing ignition delay experiment system for researching the spontaneous combustion type propellant is insufficient in precision and safety.

The invention discloses an ignition prediction method for a scramjet engine combustion chamber, and belongs to the technical field of ignition prediction. The ignition prediction method for the combustion chamber of the scramjet engine comprises the following steps that numerical simulation is conducted on the combustion chamber through three-dimensional density-based steady-state injection; judging whether a convergence condition is met; extracting flow field data of the combustion chamber after convergence; the residence time tz of the aviation kerosene micelles in the ignition area is calculated according to the flow field data; the ignition delay time tc of the ignition area is calculated according to the flow field data; and calculating the Da of the ignition area. And predicting the ignition condition according to the Da. According to the ignition prediction method for the combustion chamber of the scramjet engine, Da is calculated according to injection field data, whether ignition succeeds or not is predicted according to the size relation between Da and 1, the actual ignition working condition can be adjusted, and the ignition success rate is increased; and ignition prediction requirements of combustion chambers of various configurations can be met.

The invention provides a metal fuel as well as a preparation method and application thereof, and relates to the technical field of rocket fuels, and the metal fuel comprises the following components: fluorinated carbon nanotubes and metal particles. According to the metal fuel provided by the invention, the mixing uniformity of the metal fuel can be greatly improved, the ignition delay time is greatly shortened, the agglomeration size of a condensed-phase combustion product is remarkably reduced, the preparation method is simple, and the combustion performance of the high-energy metal fuel in a rocket engine containing a metal propellant is favorably improved.

The invention provides a vehicle rolling protection method and device, a medium and electronic equipment. The method comprises the following steps: when detecting that a rolling parameter value of a vehicle on a time axis meets a preset protection task starting condition, calculating an ignition delay duration, and obtaining various types of monitoring parameter values on the time axis based on the rolling parameter value on the time axis; when any type of monitoring parameter value on the time axis is greater than a preset monitoring threshold value of a corresponding type, setting a crossing identifier of the corresponding type; and when the various types are all provided with the crossing identifiers of the respective types and the ignition delay duration is smaller than or equal to a preset ignition delay duration threshold value, an ignition instruction of the safety air bag associated with rolling is generated. Ignition instructions for an airbag associated with roll-over are determined by multiple feature recognition of roll-over parameter values on a time axis. Therefore, safe and reliable protection is provided for passengers when the vehicle rolls over, and the survival rate of the passengers is increased.

An object of the present invention is to achieve both ensuring combustion stability of an internal combustion engine and reducing particulate matter (PM) during operation in a catalyst warm-up mode with ignition retardation. A control device 150 is a control device for a fuel injector 101 that injects fuel directly into a cylinder cavity 615 of an internal combustion engine 10 operating in a catalyst warm-up mode in which a catalyst is warmed up by ignition retardation, in which an ignition timing is retarded to an expansion stroke.The control device 150 controls the fuel injection device 101 such that a fuel injection immediately before the ignition timing is performed among a plurality of fuel injections performed during one combustion cycle in the expansion stroke during operation in the catalyst warm-up mode, and an injection amount of the fuel injection immediately before the ignition timing decreases as the ignition timing is retarded.

A control system (200), a method (600), and computer software (208) for controlling an engine (102) and an electric machine (106) of a vehicle (1). The method (600) comprises: receiving (606) a first input signal indicative of an engine idle torque requirement (TA) during engine idling; comparing (610) an instantaneous torque requirement (TA or TA+TB) with a reference engine idling torque (TC) associated with use of a base ignition retardation value; and outputting a control signal (612, 616, 618) to control output torque of the engine in dependence on the comparison, wherein if the instantaneous torque requirement (TA or TA+TB) is less than the reference engine idling torque (TC), the control signal requests (612) the reference engine idling torque (TC) with the base ignition retardation value, and the control system is configured to control the electric machine (106) to impose a retarding torque on the engine (102) to generate electrical energy, thereby reducing a net torque.

The invention discloses a starting mix box for an ignition device. The starting mix box comprises a starting mix box body, a gasket, a cover plate and ignition powder, a starting mix hole is formed in the bottom of the starting mix box body, and a step face is arranged in the starting mix box body. The gasket is positioned between the ignition powder and the flash hole and covers the whole flash hole; the cover piece is of a bowl-shaped structure, the ignition powder is reversely buckled in the starting mix box body, the height of the cover piece is smaller than that of a step face in the starting mix box body, and the cover piece and the starting mix box body are fixed in an adhesive mode. The starting mix box provided by the invention is related to the consistency of the ignition reliability and the ignition delay time of the ignition device, so that whether the ignition device can work normally or not is influenced, and the starting mix box has the characteristics of simple structure, rapidness and reliability in ignition and high environmental adaptability, and is an important component of the ignition device.