CN114217007B - Outer flame ignition platform based on cone calorimeter - Google Patents
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- CN114217007B CN114217007B CN202111533545.5A CN202111533545A CN114217007B CN 114217007 B CN114217007 B CN 114217007B CN 202111533545 A CN202111533545 A CN 202111533545A CN 114217007 B CN114217007 B CN 114217007B
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000001294 propane Substances 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 80
- 238000012360 testing method Methods 0.000 claims description 14
- 239000000779 smoke Substances 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000006004 Quartz sand Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003517 fume Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims 2
- 230000005855 radiation Effects 0.000 abstract description 5
- 238000010892 electric spark Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 54
- 239000000463 material Substances 0.000 description 11
- 229910002091 carbon monoxide Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000036284 oxygen consumption Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to an outer flame ignition platform based on a cone calorimeter, which mainly utilizes flame generated after ignition of combustible gas in a propane gas cylinder to ignite a sample to be detected in a sample box. The novel external flame ignition platform provided by the invention expands the ignition mode of electric spark and heat radiation of the traditional cone calorimeter, enriches the fire scene which can be simulated by the cone calorimeter, and is more suitable for real fire. The outer flame ignition platform also has the advantages of simple construction, low production and use costs, simple operation, economy and safety and the like, and is particularly suitable for fire or combustion simulation experiments in general laboratories.
Description
Technical Field
The invention relates to the technical field of measuring instruments and fire protection, in particular to an outer flame ignition platform based on a cone calorimeter.
Background
In daily life, fire accidents are endlessly layered, and the assessment of life and property loss caused by fire is necessary. In recent years, government authorities and fire departments have paid more attention to fire research, and the most important method for researching fire is laboratory simulation experiments. Cone calorimeters, which are commonly used as experimental equipment for testing the combustion performance of materials, are considered to be the most representative of the combustion environment of an actual fire, and are often used to simulate the ignition performance of materials in the case of an actual fire. Cone calorimeters are based on the oxygen consumption principle, which means that substantially the same heat is generated per unit mass of oxygen consumed when the material is completely burned, i.e. the oxygen consumption combustion heat is substantially the same. Cone calorimeters measure the rate of heat release from a material according to the oxygen consumption principle, with the rate of heat release being the most important performance parameter characterizing the intensity of a fire. Commercially available cone calorimeters typically employ a paramagnetic oxygen analyzer to analyze oxygen concentration, a smoke measurement system to determine the specific extinction area of smoke in a pipe, a laser beam photometer to measure smoke darkness, and non-dispersive infrared CO and CO 2 The analyzer is used for analyzing CO and CO in the flue gas 2 Analysis was performed.
The current ignition mode of the cone calorimeter in the market is basically spark ignition, such as China patent CN206450344U, CN205317710U and the like. Spark is a phenomenon in which high voltage acts on a gaseous medium to cause ionization breakdown of the gaseous medium to emit heat energy, light energy and sound energy. The surface of the sample is treated by heat radiation to volatilize combustible gas, and when the concentration of the combustible gas reaches the upper limit of ignition, the sample is burnt by electric spark, and then the combustibility and the ignition time of the sample can be tested. The mass loss rate of the sample can be determined in the combustion process, the combustion gas is collected in the attached pipeline and the exhaust hood, and indexes such as the heat release rate of the sample can be automatically tested by collecting the change of the smoke pressure difference, the gas concentration and the temperature.
The cone calorimeter test is a safe, rapid and accurate detection method, and the method can truly and accurately simulate the behavior rule of a material in a fire disaster, but has some problems, and is mainly expressed in an ignition mode. The existing cone calorimeter applies stable heat radiation to a sample through a cone heater, and then the sample is ignited by utilizing electric sparks, so that the research mode is friendly to a laboratory, however, the heat radiation in a real fire scene is quite unstable, so that the cone calorimeter has great difference between the test and the actual fire scene in the ignition mode, and the reduction of the fire scene by the cone calorimeter has great limitation. For fire types where the combustion of the article is caused mainly by flame combustion, the existing cone calorimeter test cannot truly and effectively restore the actual fire environment. Because other experimental methods for measuring the combustion performance of the material have a certain gap with the test of the cone calorimeter in the aspect of reducing the real site effect of the fire disaster, the method enriches the ignition modes of the cone calorimeter in simulating different scenes and is necessary to expand the fire disaster simulation scenes.
Disclosure of Invention
One of the purposes of the invention is to provide an outer flame ignition platform based on a cone calorimeter, which comprises the cone calorimeter 1, a stage 2, a gas cylinder 3, a gas flowmeter 4 and a burner 5. The gas flowmeter 4 is respectively connected with the gas cylinder 3 and the burner 5 through pipelines, and the cone calorimeter 1 and the burner 5 are opposite to the sample to be measured on the objective table 2; the combustible gas in the gas cylinder 3 enters the gas flowmeter 4 along the pipeline, and enters the combustor 5 for combustion after the flow and the stability are regulated, the combustor 5 ignites the sample to be tested on the objective table 2, and the cone calorimeter 1 collects combustion data to complete the test.
Further, the cone calorimeter 1 is located directly above the stage 2 during testing, and the burner 5 is located at the periphery of the stage 2. The burner 5 is arranged horizontally or obliquely towards the stage 2, preferably horizontally.
Furthermore, the cone calorimeter 1 is in a cabinet design mode and mainly comprises a temperature and pressure collecting part 11, a blower 12, a laser beam photometer 13, a gas collecting part 14, a smoke sample filter 15 and a smoke collecting cover 16; wherein the fume collecting hood 16 is communicated with the blower 12 through a pipeline, the temperature and pressure collecting part 11 is arranged on the pipeline of the air outlet of the blower 12, and the fume sample filter 15, the gas collecting part 14 and the laser beam photometer 13 are sequentially arranged on the pipeline of the air inlet of the blower 12.
Further, the temperature and pressure collecting part 11, the laser beam photometer 13, the gas collecting part 14 and the smoke sample filter 15 are respectively connected with a cone calorimeter host through pipelines or cables and used for transmitting collected samples or data.
Further, the objective table 2 includes a sample holder 21, a sample box 22, a tray 23, a balance 24, and a bracket 25, the balance 24 is disposed on the bracket 25, the tray 23 is disposed on the balance 24, the sample box 22 is disposed in the tray, and a sample to be measured is fixed in the sample box 22 by the sample holder 21.
Further, the sample cartridge 22 is vertically placed on the tray 23, and the sample holders 21 are located on the left and right sides or upper and lower sides, preferably the upper and lower sides, of the sample cartridge 22. The vertical sample box is placed and is convenient for the sample to adopt the vertical burning method to test, and the tray of stainless steel material is used for accepting the residue that the sample burns and drops.
Further, the combustible gas filled in the gas cylinder 3 is specifically propane or methane, and the gas flow meter 4 is specifically a thermal gas mass flow meter.
Further, the burner 5 comprises a burner housing, an ignition device 51, an outer nozzle perforated plate 52, quartz sand 53, a screen 54, glass balls 55 and a connecting pipe 56; the ignition device 51 and the outer nozzle perforated plate 52 are arranged on the end face of the burner housing, quartz sand 53 and glass balls 55 are filled in the burner housing and are separated by a screen 54, and the inside of the burner 5 is supplied with air through a connecting pipe 56 communicated with a gas cylinder.
Further, the inside of the burner housing is provided with a cavity, a screen 54, glass spheres 55, a screen 54, quartz sand 53, and an outer nozzle perforated plate 52 in this order in the direction of the air flow. The main function of the quartz sand and the glass balls is to rectify the combustible gas, so that the combustible gas passing through the flame outlet is more uniform, and the material is uniformly heated.
The invention improves the ignition system of the traditional cone calorimeter and provides a novel matched outer flame ignition platform. The ignition platform utilizes a propane gas cylinder to provide combustible gas, utilizes a thermal type gas mass flowmeter to control the pressure of the combustible gas and the flame heat flow acting on a sample, utilizes a burner filled with glass balls and quartz sand in a sectionalized mode to rectify and ignite the combustible gas, and the generated external flame further ignites the sample to be tested to perform a vertical combustion test.
Compared with the common ignition mode of electric spark and heat radiation of the traditional cone calorimeter, the external flame ignition platform provided by the invention greatly expands the ignition mode of the traditional cone calorimeter, enriches the fire scene which can be simulated by the external flame ignition platform, and the external flame ignition mode is more closely related to the actual fire, can restore the actual fire scene and has stronger correlation with the reality. In addition, the external flame ignition platform composed of the propane gas cylinder, the thermal type gas mass flowmeter and the burner is simple to construct, easy to operate, economical and safe, and more suitable for fire simulation experiments in general laboratories.
Drawings
FIG. 1 is a schematic view of the overall structure of an outer flame ignition platform according to the present invention;
FIG. 2 is a schematic view of the cone calorimeter of the outer flame ignition platform of the present invention;
FIG. 3 is a schematic view of the stage structure of the outer flame ignition platform of the present invention;
FIG. 4 is a schematic view of the structure of a gas cylinder of the outer flame ignition platform of the present invention;
FIG. 5 is a schematic view of the structure of a gas flow meter of the flame ignition platform of the present invention;
fig. 6 is a schematic view of a burner structure of an outer flame ignition platform according to the present invention.
Wherein 1-cone calorimeter; 2-stage; 3-gas cylinder; 4-a gas flow meter; a 5-burner; 11-temperature and pressure collection; 12-blower; 13-a laser beam photometer; 14-a gas collection part; 15-a soot sample filter; 16-fume collecting hood; 21-a sample holder; 22-sample cartridge; 23-a tray; 24-balance; 25-brackets; 31-a pressure reducing valve; 32-a bottle body; 33-an air outlet; 41-a power interface; 42-a data transmission port; 43-air inlet; 44-a regulating valve; 45-air outlet; 51-ignition means; 52-outer spout perforated plate; 53-quartz sand; 54-screen mesh; 55-glass spheres; 56-connecting tube.
Detailed Description
In order to make the technical scheme and the beneficial effects of the present invention fully understood by those skilled in the art, the following description is further made with reference to specific embodiments and drawings.
The outer flame ignition platform based on the cone calorimeter shown in the figures 1-6 is mainly assembled by the components of the cone calorimeter 1, an objective table 2, a gas bottle 3 (filled with propane or methane), a gas flowmeter 4 (type: thermal gas mass flowmeter), a burner 5 and the like. The gas cylinder 3 is mainly used for providing combustible gas and igniting a sample to be detected by utilizing flame generated by combustion of the gas cylinder, the gas flowmeter 4 and the burner 5 are mainly used for regulating and controlling the size of the ignited flame, the object stage 2 is mainly used for providing a fixing and igniting place of the sample to be detected, and the cone calorimeter 1 is mainly used for collecting flue gas generated by combustion for further analysis and treatment.
The cone calorimeter 1 adopts a cabinet-type design (comprising a plurality of cabinets), and a host machine comprises an exhaust system, an integrated gas pretreatment system, a paramagnetic oxygen analyzer, non-dispersive infrared rays CO and CO 2 An analyzer, an SB type heat flow meter, a portable water cooling system, a data acquisition system, a software operating system and the like (specific structures can refer to similar products on the market). The exhaust system consists of a fan, a fume collecting hood, an exhaust pipeline, a pore plate flowmeter and the like. The integrated gas pretreatment system comprises a sampling pump, a filter, a condenser, a peristaltic pump, a moisture filter and the like. The design range of the SB type heat flow meter is 0-100kW/m, the accuracy is +/-3%, the repeatability is +/-0.5%, and the SB type heat flow meter meets the factory standard. When the heat flow timing is used, a tap water source and an equipped water pipe are not required to be externally connected, and the portable water cooling system is used for cooling. The data acquisition system can automatically record output signals of instruments or sensors such as a gas analyzer, an orifice plate flowmeter, a thermocouple and the like. The software operating system is used for controlling the system to run, recording and analyzing a test result, wherein the test result comprises: heat release rate, flue gas flow rate, C coefficient, sample ignition and extinction time, total oxygen consumption, total fuming amount, mass loss rate, total heat release amount, effective combustion heat, carbon dioxide generation amount, carbon monoxide generation amount, and the like. The cone calorimeter is specifically used as follows: firstly, starting the system of the cone calorimeter 1 and preheating for one hour, and starting to calibrate a gas sensor, C coefficient and optical path system after preheating is finished. After the calibration work is completed, the net mass of the sample is weighed and recorded, the side surfaces and the bottom surface of the sample are covered by aluminum foils, the sample is fixed by a sample clamp 21, a sample box 22 is placed in a stainless steel tray 23, the balance 24 is used for weighing, after the completion, the propane gas at the tail end of the burner is ignited by an ignition device 51, and the sample is ignited by the generated flame.
The sample box 22 on the stage 2 is vertically placed on a tray 23 (stainless steel material) and then integrally placed on a balance 24, and a bracket 25 (stainless steel material) for supporting is provided under the balance 24. During testing, a sample to be tested is fixed by the sample clamps 21 at the upper end and the lower end of the sample box 22 to prevent the sample from falling off, and then the gas cylinder 3, the gas flowmeter 4 and the burner 5 are connected in sequence by using a pipe, wherein the perforated plate 52 with the outer nozzle is aligned with the sample on the sample box 22. The sample fixing mode corresponds to a vertical burning method, the tray can receive solid residues falling in the sample burning process, and the tray ensures that the sample is at a proper height. The gas cylinder 3 mainly comprises a pressure reducing valve 31, a cylinder body 32 and a gas outlet 33. The gas cylinder body adopts a single-layer structure, and the pressure reducing valve has the function of ensuring that liquid propane in the gas cylinder is gasified into combustible propane gas after being depressurized and then is conveyed into a combustor through a pipeline to be ignited. The gas flowmeter 4 mainly comprises a power interface 41, a data transmission port 42, an air inlet 43, a regulating valve 44 and an air outlet 45, and the internal structure mainly comprises a regulator, a driver, a comparator, an amplifier, a sensor and the like. Wherein the sensor probe consists of two sensing elements-a speed sensor and a temperature sensor, with which the effects of temperature and pressure variations are automatically corrected. The meter circuit heats the speed sensor to a constant value above the gas temperature and then measures the WT gas mass flow controller cooling effect of the gas flow, and calculates the gas flow by measuring the principle that the electrical power consumed to maintain a constant temperature difference is proportional to the mass flow of the gas. The burner 5 mainly comprises an ignition device 51, an outer nozzle perforated plate 52, quartz sand 53, a screen 54 (made of metal), glass balls 55 and a connecting pipe 56 which are arranged at the flame outlet. The burner belongs to a strip burner, and comprises a flame outlet, quartz sand, a screen, glass balls and metal in sequence from left to right (opposite to the airflow direction).
The using method of the outer flame ignition platform of the cone calorimeter is as follows: firstly, a cone calorimeter host is opened to perform a series of detection and correction, then a material to be detected is placed in a vertically arranged sample box 22 and is fixed by a sample clamp 21, and then a gas cylinder 3, a gas flowmeter 4 and a burner 5 are connected in sequence. The gas flowmeter 4 is well connected with a power supply and a computer of a cone calorimeter host, parameters such as the flow rate of combustible gas are set, and the gas flowmeter 4 is preheated for 20 minutes and the zero point is checked before the experiment is started. Then the gas cylinder 3 is opened, after the gas flowmeter 4 is stabilized, the angle of the burner 5 is adjusted to lead the outlet of the burner to be aligned with the sample to be tested, and after the propane gas is stabilized, the ignition device 51 is used for igniting and igniting the sample to be tested. And meanwhile, clicking a start experiment button of a host computer of the cone calorimeter, collecting smoke generated by combustion through a smoke collecting hood 16 of the cone calorimeter for further analysis and treatment, and finally obtaining the combustion characteristic of the sample under the condition of external flame ignition.
The foregoing description is only illustrative of the experimental procedures of the present invention, and the present invention is not limited to the above-described specific experimental modes, which are only exemplary, and many modifications can be made by one of ordinary skill in the art without departing from the spirit of the invention, which are all within the scope of the present invention.
Claims (8)
1. An outer flame ignition platform based on cone calorimeter, its characterized in that: the ignition platform comprises a cone calorimeter (1), an objective table (2), a gas cylinder (3), a gas flowmeter (4) and a burner (5); the burner (5) comprises a burner shell, an ignition device (51), an outer nozzle perforated plate (52), quartz sand (53), a screen (54), glass balls (55) and connecting pipes (56), wherein the ignition device (51) and the outer nozzle perforated plate (52) are arranged on the end face of the burner shell, the quartz sand (53) and the glass balls (55) are filled in the burner shell and are separated by the screen (54), and the inside of the burner (5) is supplied with air through the connecting pipes (56) communicated with a gas cylinder; the gas flowmeter (4) is respectively connected with the gas cylinder (3) and the burner (5) through pipelines, and the cone calorimeter (1) and the burner (5) are opposite to the sample to be measured on the objective table (2); the combustible gas in the gas cylinder (3) passes through the gas flowmeter (4) along the pipeline and then enters the combustor (5) for combustion, the combustor (5) ignites the sample to be tested on the objective table (2), and the cone calorimeter (1) collects combustion data to complete the test.
2. The outer flame ignition platform of claim 1, wherein: during testing, the cone calorimeter (1) is positioned right above the objective table (2), and the burner (5) is positioned at the periphery of the objective table (2).
3. The outer flame ignition platform of claim 1, wherein: the cone calorimeter (1) comprises a temperature and pressure acquisition part (11), a blower (12), a laser beam photometer (13), a gas acquisition part (14), a smoke dust sample filter (15) and a smoke collecting cover (16); wherein the fume collecting hood (16) is communicated with the air blower (12) through a pipeline, the temperature and pressure collecting part (11) is arranged on the pipeline of the air outlet of the air blower (12), and the smoke sample filter (15), the gas collecting part (14) and the laser beam photometer (13) are sequentially arranged on the pipeline of the air inlet of the air blower (12).
4. The outer flame ignition platform of claim 3 wherein: the temperature and pressure collecting part (11), the laser beam photometer (13), the gas collecting part (14) and the smoke dust sample filter (15) are respectively connected with the cone calorimeter host through pipelines or cables and are used for transmitting collected samples or data.
5. The outer flame ignition platform of claim 1, wherein: the objective table (2) comprises a sample clamp (21), a sample box (22), a tray (23), a balance (24) and a bracket (25), wherein the balance (24) is arranged on the bracket (25), the tray (23) is positioned on the balance (24), the sample box (22) is placed in the tray, and a sample to be measured is fixed in the sample box (22) through the sample clamp (21).
6. The outer flame ignition platform of claim 5 wherein: the sample box (22) is vertically arranged on the tray (23), and the sample clamp (21) is positioned on the left side and the right side or the upper side and the lower side of the sample box (22).
7. The outer flame ignition platform of claim 1, wherein: the combustible gas filled in the gas bottle (3) is specifically propane or methane, and the gas flowmeter (4) is specifically a thermal gas mass flowmeter.
8. The outer flame ignition platform of claim 1, wherein: the inside of the burner shell is provided with a cavity, a screen (54), glass balls (55), the screen (54), quartz sand (53) and an outer nozzle perforated plate (52) in sequence along the airflow direction.
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| CN118050245A (en) * | 2024-04-16 | 2024-05-17 | 中国科学技术大学 | System and method for testing thermodynamic coupling of structural member in simulated fire environment |
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| 基于三维图像分析的浮力扩散火焰几何与辐射特性研究;余辉等;《火灾科学》;第30卷(第3期);第127页 * |
| 基于二维激光诱导炽光法的棉籽油扩散火焰碳烟生成特性;何旭等;《北京理工大学学报》;第39卷(第3期);第237页 * |
| 水平环境风条件下气体池火扩散火焰底部特殊行为研究;张笑征;《硕士电子期刊》;第11页 * |
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