39 results about "Flame height" patented technology

The invention relates to the technical field of jet flow flame disaster-causing parameter prediction, and discloses a jet flow diffusion flame size and radiation characteristic prediction method and system based on a machine learning method. The method comprises the following steps: constructing a flame size empirical model based on experimental data characteristics; constructing a machine learning model to predict flame height, width and lifting height, and combining the empirical model as a loss function with the empirical model; mass flow is determined according to the gas parameters, and a flame dwell time and radiation fraction calculation model is established in combination with a flame width prediction model; and establishing a flame total radiation power calculation model and a radiation source weighted distribution model, and solving the radiation heat flux by combining a flame height and lifting height prediction model. The prediction method provided by the invention can be used for predicting the sizes and radiation characteristics of jet diffusion flames with different scales under various working conditions, and has the characteristics of high prediction efficiency, high prediction precision, wide application range and the like.

The invention relates to the technical field of continuous casting, in particular to a method for monitoring and judging a flowing mode of molten steel in a slab crystallizer, which comprises the following steps of: acquiring a time sequence image of the liquid level of the crystallizer, and dividing the liquid level into a plurality of monitoring sub-areas by taking a water gap as a center; based on the time sequence image, flame characteristic parameters of all the monitoring sub-areas are extracted, and the flame characteristic parameters comprise the flame coverage area proportion and the flame height; based on the flame characteristic parameters, determining distribution characteristics of a flame-free area of the liquid level; and based on the liquid level flame-free area distribution characteristics and a plurality of preset flame height threshold values, the molten steel flowing mode is determined through multi-stage logic judgment. The monitoring equipment is far away from a high-temperature area, low in complexity, long in service life, free of continuous input of consumables and low in cost, the liquid level of the crystallizer cannot be disturbed in the monitoring process, nondestructive monitoring is achieved, and the flowing state on the liquid level of the crystallizer can be continuously monitored for a long time.

An automated method of measuring, monitoring and recording candle burn performance using vision system automation. The method includes timed candle flame height measurement consisting of a camera using image bursts. Recording in a database with a unique identifier barcode for each candle and corresponding wick to identify and record candle data with a date and time stamp. Audio-Visual alerts for flame callouts less than ½ inch or greater than 2 inches and 3″. Documenting any extinguished candles / wicks (mid and / or end of life). Candle Temperature Measurement is performed every 2 hours (depending on burn type and cycle), which includes wax melt pool temperature (with callouts for temperatures reaching and / or exceeding 250 deg C.) and container side wall temperature. Candle Picture is performed at the mid and end of life, and the sustainer position is tracked to determine wick migration.

The application discloses a fire plume characteristic parameter calculation method, an evolution experiment device and a use method, and relates to the technical field of fire safety, and aims to provide a fire plume characteristic parameter calculation method, an evolution experiment device and a use method. The fire plume characteristic parameter calculation method comprises the following steps: determining influence factors of fire characteristics under a vertical shaft structure, establishing a relationship formula of fire characteristics and the influence factors, and the fire characteristics comprise an average fire plume height and a temperature rise in the vertical direction inside the vertical shaft; simulation experiments are carried out through a fire plume evolution experiment device, simulation results under different working conditions are obtained, a scatter diagram is drawn, and the influence of the influence factors on the fire characteristics is determined; basic physical quantities of the influence factors are determined, the relationship formula of the fire characteristics and the influence factors is converted into a dimensionless relationship formula; nonlinear fitting is carried out on the results of the scatter diagram, and a fire plume representation model is established based on the dimensionless relationship formula; in this way, the average fire plume height under the vertical shaft structure and the temperature rise in the vertical direction inside the vertical shaft are calculated, effective guidance can be provided for fire rescue, and the disaster relief efficiency is improved.

The application relates to a candle pop. The candle pop comprises a shell, a wax base, a wick and a driving mechanism. The shell is provided with a containing cavity. The wax base is arranged in the containing cavity. The wick is arranged in the wax base and is used for burning the wax base. The wick has a burning section exposed outside the wax base and used for burning. The driving mechanism is arranged on the shell and drives the wax base to slide in the containing cavity, so that the distance between the free end of the burning section and the open mouth of the containing cavity and the wax base is within a set range. Thus, the position of the free end of the burning section in the containing cavity is basically kept constant, so that the position of the flame in the containing cavity is basically kept constant, that is, the height of the flame is basically kept unchanged. In the case that the height of the flame is basically kept unchanged, the user can observe the flame through a basically constant visual angle without frequently changing the visual angle to adapt to the flame with a great change in height. Thus, the flame generated by the burning section has a reasonable observation visual angle, so that the user experience is improved.

The invention relates to the technical field of art burning, and discloses an art burning control method and system, a storage medium and electronic equipment, and the method comprises the steps: responding to a target time sequence formula selected by a user, and according to the start-stop time sequence and the working time length of each type of target art burning device contained in the target time sequence formula, controlling the target art burning device according to the start-stop time sequence and the working time length of each type of target art burning device; each type of target art burning device is controlled to carry out ignition or flameout operation; inputting current meteorological parameters collected in real time into the optimized RBF neural network to obtain predicted PID control parameters; and based on the predicted PID control parameters, adjusting the opening degree of an electric adjusting valve of each type of target art burning device so as to enable the flame height and the burning posture to adapt to environmental changes. The problems of manual control, fixed time sequence and difficulty in dynamic adjustment of existing art fire can be solved, dynamic adjustment of the time sequence of art fire and self-adaption of flame to environment change are realized, and the flexibility and effect of art fire control are improved.

The invention discloses a flame boiler combustion control system and method, and belongs to the field of combustion control systems.The system comprises a coal quality multi-dimensional evaluation module, a coal quality control module and a coal quality control module, the monitoring information comprises flame height, flame color spectrum distribution, smoke generation amount, smoke component concentration and combustion voiceprint characteristics; a quality score generation module connected to the coal quality multi-dimensional evaluation module and configured to generate a coal quality score S through a weighted fusion algorithm based on the monitoring information; and the control strategy decision engine comprises a case matching unit, a historical case database, a feeding management module and a combustion controller and is configured to execute the following operations. According to the system and the method, the abnormity of coal combustion can be found in time when the boiler runs, adaptive adjustment can be made according to the abnormal condition, and finally self-adaptive control, running zero interruption, efficiency optimization and whole-process responsibility tracing of the coal-fired boiler are achieved.

The application discloses a material high-temperature hydrogen permeation simulation experiment device and experiment method based on a counter diffusion flame burner. Fuel enters a fuel cavity with horizontal initial momentum, is discharged after the initial momentum is weakened, and oxidant is vertically discharged with an initial speed and is distributed above the fuel gas flow, so that the fuel and the oxidant form a speed difference, the oxidant can form an entrainment effect on the fuel, the mixing of the oxidant and the fuel is promoted, the stability and heat release efficiency of the counter diffusion flame are improved, sufficient combustion and uniformity of flame temperature distribution are ensured, efficient and uniform mixing can be realized without a swirl generator, the structure of the counter diffusion flame burner is simplified, the equivalence ratio of the oxidant and the fuel can be adjusted by a data acquisition and control system to adjust the combustion state of the flame, so that the flame height, the temperature and the active free radical concentration are accurately controlled, the application scene of a sample is effectively simulated, various flame environments can be provided for performance experiments of the sample, and the experimental reliability is improved.

This invention reveals a diagnostic and blockage detection system for direct heating process furnaces, aimed at enhancing operational efficiency and safety. The system comprises an accurate dynamic model of the furnace, measuring equipment, and a fault identifier, which work in conjunction to monitor and analyze furnace performance. The dynamic model is constructed using thermodynamic principles, heat transfer, and mass transfer relationships. It is implemented on a powerful computer and calibrated using dimensional specifications and real system data. The model incorporates empirical and semi-empirical relations governing the thermodynamic conditions of crude oil, as well as heat transfer coefficients in both single-phase and two-phase regimes, considering the effects of flame height and combustion conditions. To facilitate real-time monitoring, the system employs various measuring devices, including thermocouples (7) and pressure sensors (6), to capture essential parameters such as fuel flow rate, combustion air flow rate, combustion temperature, and the temperature, pressure, and flow rates of input and output crude oil. These measured values serve as inputs to the mathematical model, allowing for the comparison of model outputs with actual system performance. The fault identifier is designed to classify data into acceptable and unacceptable categories, issuing alerts when the blockage level in the pipes (10) exceeds predetermined thresholds. This functionality enables operators to take preventive actions, such as clearing blockages or performing maintenance, ensuring optimal furnace operation. Overall, this innovative device significantly enhances the ability to detect and analyze blockages in direct heating furnaces, thereby improving operational reliability and reducing downtime, ultimately contributing to better process efficiency in industrial applications.

The present application belongs to the field of warmers, and particularly relates to an outdoor gas warmer. The outdoor gas warmer comprises, from bottom to top, a gas source storage box, a valve body assembly and a combustion assembly, which constitute a tower-shaped main body as a whole; the gas source storage box is of a box structure, the valve body assembly is internally provided with an electromagnetic flow valve, a multi-pass composite gas valve, an igniter and a burner; the electromagnetic flow valve is used for controlling the gas flow, the multi-pass composite gas valve controls the gas flow direction and guides the gas to the igniter; the igniter is used for ignition; the combustion assembly comprises a glass tube with a lower end cover arranged on the burner to close the burner, and is provided with a gas valve for supplying the combustion gas into the glass tube. The present application can effectively improve the gas utilization rate, simultaneously heats through two forms of heat radiation and contact heat transfer, reduces the energy invalid loss, improves the temperature rising rate, in addition, can visually estimate the flame height to estimate the gas residual amount, can realize continuous and uninterrupted combustion and gas supply, and the use effect is obviously improved.

The invention belongs to the field of fuel fireplaces, relates to a fuel fireplace vaporizing combustion assembly and a control method thereof, and discloses the fuel fireplace vaporizing combustion assembly which comprises a combustion groove, a first fuel pipe located in the combustion groove and an ignition rod arranged on one side of the first fuel pipe. The first partition plate and the second partition plate are sequentially arranged below the first fuel pipe from top to bottom; first air holes are formed in the first partition plate, second air holes are formed in the second partition plate, and the second air holes and the first air holes are jointly arranged in the length direction of the combustion groove in a staggered arrangement mode; a second fuel pipe sequentially penetrating through the first partition plate and the second partition plate is further arranged in the combustion groove, the second fuel pipe extends to the position below the second partition plate, the invention further discloses a control method of the fuel fireplace vaporizing combustion assembly, and the control method comprises the vaporizing combustion assembly. And the combustion efficiency of the fuel is improved, so that the consumption of the fuel is reduced.

A flame detection system is disclosed. The flame detection system comprises one or more processors coupled to at least one flame detector and at least one image capturing device. The one or more processors identify a location of a flame by determining a base Y-coordinate, a tip Y-coordinate, a left-most X-coordinate, and a right-most X-coordinate of the plurality of pixels associated with the flame; determining that the base Y-coordinate of a most current image of the sequence of images varies less than a predefined limit of height of the flame; and determining that the tip Y-coordinate of the most current image of the sequence of images varies more than the predefined limit of height of the flame, or the left-most X-coordinate or the right-most X coordinate of the most current image of the sequence of images varies more than a predefined limit of width of the flame.

The invention discloses a plasma-assisted jet flame combustion control system and a use method thereof. The system comprises a jet combustor, a gas supply system and a monitoring control system. The jet burner is of a three-layer coaxial structure, is provided with a fuel pipe, a first wake air pipe and a second wake air pipe and is provided with two sets of electrode systems driven by independent power sources, and primary ionization ignition of fuel and secondary ionization activation of second wake air are achieved. The air supply system accurately controls the ratio of multi-component fuel to air. The monitoring control system realizes high-precision online measurement of the flame height, adopts a multi-frame statistics and probability modeling method, combines OTSU adaptive segmentation and pixel level calibration technologies, and significantly improves the accuracy. The system can obtain the flame height in real time and dynamically adjust the secondary ionization intensity, so that the combustion state is accurately regulated and controlled, the phenomenon that the flame is too high or too low is effectively restrained, the combustion efficiency, stability and response speed are improved, and the system is suitable for low-carbon clean combustion application scenes.

The invention relates to the technical field of oil product combustion leakage prevention and control, and provides a porous medium vertical isolation device for simulating flowing fire diffusion combustion and an evaluation method.The porous medium vertical isolation device comprises a T-shaped rack, a leaked oil supply module and a leaked oil collection tank, and an oil leakage groove used for oil product flowing is formed in the surface of the T-shaped rack; a channel used for containing a porous medium filter material and an oil outlet pipe used for collecting vertical seepage leaked oil are further arranged in the T-shaped rack, a high-energy ignition device is further arranged at the output end of the leaked oil supply module, and the data acquisition module is used for monitoring the combustion flame height, the combustion heat radiation intensity and the combustion flame temperature. Through the arrangement of the leaked oil supply module, the oil leakage groove and the porous medium filter element, the design of a prevention and control belt for flowing leaked oil flowing fire under the combustion condition through porous media with different infiltration capacities can be achieved, and then the infiltration capacity of different leaked oil products passing through the prevention and control belt in an oriented mode is achieved; and a support is provided for constructing an efficient porous medium prevention and control belt.

The utility model relates to an alcohol fireplace structure, which comprises a shell, a liquid storage box and a high-temperature gasification box device which are arranged in the shell, a combustion box device which is communicated with the high-temperature gasification box device is arranged on the shell, and the alcohol fireplace structure is characterized by further comprising a preheating box device which is arranged in the shell, the liquid storage box, the preheating box device and the high-temperature gasification box device are sequentially communicated, and the heating temperature of the preheating box device is lower than or equal to that of the high-temperature gasification box device. By arranging the preheating box device, low-temperature alcohol in the liquid storage box is preheated in the preheating box device before flowing into the high-temperature gasification box device, and then the preheated alcohol is conveyed into the high-temperature gasification box device, so that the temperature difference is greatly reduced to maintain the output of gas alcohol; and the flame height can be kept stable, so that the stability of the heating temperature is ensured, and the use experience feeling of a user is ensured.

This invention discloses an outer ring burner cap, relating to the field of burner technology. The outer ring burner cap includes an upper burner cap and a lower burner cap. The upper burner cap fits onto the lower burner cap to form an inner ring of flame holes, located on the radially inner sidewall of the outer ring burner cap. The inner ring of flame holes includes a first flame hole and a second flame hole. In the circumferential direction of the outer ring burner cap, the upper burner cap can rotate relative to the lower burner cap between a first extreme position and a second extreme position to change the difference in size between the first and second flame holes. When the upper burner cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner cap, the first flame hole gradually enlarges, and the second flame hole gradually decreases, thereby changing the difference in size between the first and second flame holes. This changes the overall flame height of the inner ring of flame holes, thus altering the degree of heating of the inner ring of the pot bottom and preventing uneven heating of the food inside the pot due to uneven heat distribution between the inner and outer rings.

The invention relates to the technical field of light control, in particular to a control method and device based on a lamp bead simulation flame effect and a terminal. The method comprises the following steps: calculating flame offset according to acquired lamp bead arrangement information, lamp bead quantity and user preference parameters; according to the number of the lamp beads and the flame offset, the virtual flame height is calculated, and a virtual flame coordinate system is constructed; a flame layering model is constructed, flame is divided into a flame core layer, an outer flame layer and a flame tip layer in the flame layering model, the flame core layer is simulated through virtual lamp beads, and the flame tip layer corresponds to real lamp beads; on the basis of the virtual flame coordinate system and the flame layering model, temperature changes of the virtual lamp beads are calculated, and heat of the virtual lamp beads is made to be transmitted upwards in the longitudinal direction; and mapping the temperature distribution of the flame core layer to a real lamp bead, and determining the display color of the real lamp bead according to the temperature. The problems that the flame layering sense is weak, the dynamic effect lacks the real heat conduction characteristic, and the lamp bead array adaptability is limited can be solved.

The present application relates to hydrogen pipeline test test technical field, disclose a kind of high-pressure large-diameter hydrogen pipeline jet fire flame shape multi-source image measurement method, the method comprises: the synchronous acquisition of multi-source image data is carried out, and space calibration and coordinate uniformity are carried out;Select the video clip of jet fire flame stable combustion stage, output video as high-resolution image sequence frame by frame, and carry out pre-processing;The flame region boundary extraction of each frame image after pre-processing is carried out;Intermittent degree method is used to each frame image superimposed statistical flame appearance frequency, form flame probability distribution diagram;In the unified coordinate system, calculate flame shape parameter;The weight of each image source is calculated, and the flame boundary and flame shape parameter obtained by different image sources are uniformly fused according to the weight of each image source. Using the present application scheme, the high-precision, repeatable, traceable measurement of flame height, width, ground clearance, inclination and other shape parameters can be realized.

The application provides a scene adaptability-based broad-spectrum fire extinguishing parameter dynamic adjustment method and system, relates to the technical field of parameter measurement, and comprises the following steps: acquiring scene characteristic information of a scene where a fire extinguishing target is located, selecting an applicable fire extinguishing medium type and an initial supply parameter; performing fire extinguishing control on the fire extinguishing target, and collecting fire scene dynamic feedback parameters in real time; judging a fire development stage according to a flame height and a thermal radiation intensity, and matching a pressure supply intensity; adjusting the initial supply parameter, and continuously performing fire extinguishing control; after the fire extinguishing is completed, collecting target fire extinguishing records, and storing the target fire extinguishing records in association with corresponding scene characteristic information in a historical database. The application solves the technical problem that, in the prior art, because the real-time measurement dimension of key fire scene parameters is single, a fire extinguishing strategy is fixedly set depending on scene labels, and the fire extinguishing success rate is affected, introduces fire scene characteristic information collection based on collaborative measurement of multiple types of sensing devices, and improves the fire extinguishing success rate.

The invention discloses a shaft flow parameter inversion method, device and equipment based on a gas well blowout flame form and a medium. The method comprises the following steps: determining a gas well nozzle inversion model adopted during blowout of a gas well; the current blowout flame height and the current gas well working condition parameters collected at the current moment during gas well blowout are obtained; on the basis of the current blowout flame height and the current gas well working condition parameters, the virtual nozzle flow velocity at the current moment during gas well blowout is inverted through a gas well nozzle inversion model; according to the virtual nozzle flow velocity during gas well blowout at the current moment, the real nozzle jet flow pressure and the real nozzle flow velocity during gas well blowout at the current moment are determined; and on the basis of the real nozzle jet flow pressure and the real nozzle flow speed during gas well blowout at the current moment, shaft flow parameters during gas well blowout at the current moment are determined. According to the scheme, the wellbore flow parameters are calculated based on the blowout flame height and the gas well working condition parameters during gas well blowout.

This invention provides an electrical fire monitoring and fire protection IoT system. The system includes a control module and a camera module controlled by the control module. The camera module acquires flame height information and extracts the maximum value, thereby obtaining the movement distance and direction of the maximum value. A two-level attention method is then used to acquire the flame pattern diagram. The beneficial effects of this invention are: it enables the judgment of the fire pattern, allowing for targeted firefighting when using fire-fighting tools, thus preventing greater damage to the area where the equipment is located and greatly protecting the safety of the area.

The application discloses a fire grate, a burner and a water heater, and relates to the technical field of water heaters, wherein the fire grate comprises: a fire grate body, which is provided with a first gas passage and a first combustion area, and the exhaust end of the first gas passage is communicated with the first combustion area; an outer shell, which is arranged outside the fire grate body, and the outer shell and the fire grate body are connected to define a second gas passage and a second combustion area, and the exhaust end of the second gas passage is communicated with the second combustion area; the second combustion area is arranged adjacent to the first combustion area, one of the first combustion area and the second combustion area is a lean combustion area, and the other is a rich combustion area; and a metal mesh, which is arranged in a flat manner to cover the lean combustion area. The technical scheme provided by the application can reduce the flame height of the fire grate combustion, and improve the sufficiency, stability and combustion efficiency of the fire grate combustion.

The utility model belongs to the technical field of gas water heaters, and particularly discloses a burner and a gas water heater. The combustor comprises a plurality of fire grate structures arranged in parallel, premixing cavities are formed in the fire grate structures, main fire holes communicated with the premixing cavities are formed in the tops of the fire grate structures, the combustor further comprises flow guide plates arranged between the adjacent fire grate structures, the flow guide plates extend in the length direction of the fire grate structures, and every two adjacent flow guide plates are spaced to form a guide channel. The guide plate is provided with a guide part, the guide part is obliquely arranged from bottom to top in the direction close to the main fire hole in the height direction of the fire grate structure so as to reduce the circulation area of the guide channel, and the lower end of the guide part is higher than the fire grate structure. The height of flame formed by the burner is low, and the flame cannot incline.

The invention discloses a material high-temperature hydrogen permeation simulation experiment device and method based on a reverse diffusion flame burner, fuel enters a fuel cavity with horizontal initial momentum and is discharged after the initial momentum is weakened, and an oxidant is vertically discharged at an initial speed and is distributed above fuel airflow, so that a speed difference is formed between the fuel and the oxidant; the oxidant can form an entrainment effect on fuel so as to promote mixing of the oxidant and the fuel, improve stability and heat release efficiency of reverse diffusion flames and ensure sufficient combustion and flame temperature distribution uniformity, meanwhile, efficient and uniform mixing can be achieved without a rotational flow generator, the structure of the reverse diffusion flame burner is simplified, and the cost is reduced. The data acquisition and control system can adjust the equivalence ratio of the oxidant to the fuel so as to adjust the combustion state of the flame, so that the flame height, the temperature and the active free radical concentration are accurately controlled, the application scene of the sample is effectively simulated, various flame environments can be provided for the performance experiment of the sample, and the experiment reliability is improved.

The utility model discloses a lighter flame rotation adjusting assembly which comprises a mounting plate provided with a motor. The rotating part is arranged at the lower end of the mounting plate and connected with the power output end of the motor, the bottom of the rotating part is connected with a gas guide cylinder matched with the gas outlet end of the lighter, and a tooth-shaped piece is arranged on the inner circumference of the gas guide cylinder; the cylindrical cover is arranged at the upper part of the mounting plate, an ignition needle and a gas guide pipe which extends into the rotating part and is communicated with the gas guide cylinder are arranged in the cylindrical cover, the flame height of the lighter can be detected by the adjusting assembly, the working intensity of inspection personnel is reduced, and the reliability of detection data is improved; in the lighter flame height adjustment process, the work efficiency can be improved, manual work is replaced, the quality is stable, and safety risks do not exist.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body, the fire grate body is provided with a first gas channel and a first combustion area, and the exhaust end of the first gas channel is communicated with the first combustion area; the shell is arranged on the outer side of the fire grate body, a second gas channel and a second combustion area are defined between the shell and the fire grate body, and the exhaust end of the second gas channel communicates with the second combustion area; the second combustion area is adjacent to the first combustion area, one of the first combustion area and the second combustion area is a lean combustion area, and the other one of the first combustion area and the second combustion area is a rich combustion area; and the metal net covers the lean combustion area in a tiled manner. According to the technical scheme, the flame height of fire grate combustion can be reduced, and the sufficiency, stability and combustion efficiency of fire grate combustion are improved.

The utility model relates to the technical field of combustors, and discloses a combustion machine head for a combustor, a plurality of groups of air injection mechanisms are arranged on the outer surface of a combustion machine head body in the length direction of the combustion machine head body, and each air injection mechanism comprises a plurality of groups of radial air injection assemblies arranged on the combustion machine head body in the circumferential direction. A tangential gas injection assembly is arranged between every two adjacent radial gas injection assemblies, the radial gas injection assemblies are used for injecting mixed gas in the radial direction of the combustion machine head body, and the tangential gas injection assemblies are used for injecting the mixed gas along the outer surface of the combustion machine head body. Mixed gas sprayed out of the radial gas spraying assembly in the radial direction is cut off through mixed gas sprayed out of the tangential gas spraying assembly in the tangential direction, the spraying height of the mixed gas can be effectively reduced, flames can be evenly distributed on the surface of the combustion machine head body, the flame height is effectively controlled, and therefore the open fire intensity is reduced under the condition that heat is not lost, and the combustion efficiency is improved. And therefore, the overheating damage to the heat exchange spray pipe is reduced.

This invention discloses a perfluorohexanone (PFH) fire extinguishing performance testing system and method, comprising a PPH storage tank and a laboratory. The PPH storage tank is located outside the laboratory and is connected to the laboratory via a pipeline. An oil pan is located in the center of the laboratory to simulate a fire source. A thermocouple tree is connected to the upper side of the oil pan to measure the temperature at different flame heights. Multiple first thermocouples are installed at different heights on the side walls of the laboratory to measure temperature changes at different heights. Nozzles are detachably connected to the ends of the pipelines. The nozzles are evenly arranged at a designed spacing, and the spray coverage of the nozzles completely covers the protected area of ​​the laboratory. A high-definition camera and a thermal imaging camera are installed in the laboratory. This invention can monitor the fire extinguishing performance of PPH under different spray pressures and nozzle types, and the test data is accurate.

The utility model discloses a burner and gas water heater relates to water heater technical field, the burner includes fire grate body and burning cover, the fire grate body is equipped with the cavity and with the burning mouth of cavity intercommunication, the burning cover is covered on the burning mouth and extends towards the cavity, and the burning cover is equipped with the cavity. A first fire hole and a second fire hole are formed in the combustion cover in the width direction, a third fire hole is defined by the combustion cover and the combustion opening, and the first fire hole, the second fire hole and the third fire hole are distributed in the width direction of the fire grate body at intervals and communicate with the cavity; according to the utility model, two fire holes are changed into three fire holes, so that the width of a single fire hole is reduced, and the area of the single fire hole is smaller, therefore, when the fire holes are used for burning, the flame height is lower, the backfire is not easy to occur, and the uniformity and the stability of the burning flame are favorably improved.

This invention discloses a method and apparatus for quantitatively grading and evaluating the fire extinguishing and reignition resistance performance of microcapsule fire extinguishing patch products. The method includes: S1: Installing the microcapsule fire extinguishing patch product under the sample fixing platform and arranging thermocouples; S2: Adjusting the flame of the combustion needle to a specified flame height and recording the fuel flow rate or valve opening; S3: Setting an initial extinguishing distance and recording the actual extinguishing time; S4: Gradually increasing the extinguishing distance, repeating step S3, recording the extinguishing time at each extinguishing distance, and plotting the extinguishing time-extinguishing distance relationship curve; S5: Determining the maximum extinguishing distance based on step S4, and repeating step S3 at this distance, recording the number of repeatable extinguishing attempts, and evaluating the microcapsule fire extinguishing patch product by combining the grading results of the maximum extinguishing distance and the grading results of the number of repeatable extinguishing attempts. This invention provides a scientific evaluation method for the engineering application and standardized management of microcapsule fire extinguishing products, ensuring the quality of advanced technology products.