CN108169407A - A kind of vertical combustion characteristics experimental provision of controllable gas environment, abutment wall structure - Google Patents
A kind of vertical combustion characteristics experimental provision of controllable gas environment, abutment wall structure Download PDFInfo
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Abstract
The invention discloses a kind of controllable gas environment, the vertical combustion characteristics experimental provisions of abutment wall structure, including experimental bench, analysis and Control cabinet, fuel gas gas cylinder group and vacuum pump, the experimental bench includes combustion chamber, the fixing device of variable abutment wall structure, gas uniform device, heat flow transducer, linear ignition device, smoke gas collecting apparatus；The analysis and Control cabinet includes operation panel, gas mixing regulator control system, gas pressure regulator control system, heat flow data harvester, flue gas toxity analytical equipment, main frame, computer display, mouse-keyboard；Operation panel includes power switch button, scram button, starts to measure button and button ignition switch；The invention belongs to experimental teaching or scientific research apparatus technical fields, for being vertically arranged the measure of combustible characterisitic parameter in combustion process under gas with various environment, different abutment wall structural conditions, are mainly used among fire-fighting teaching and research work.
Description
Technical field
The present invention is used to be vertically arranged combustible in gas with various environment (different oxygen concentrations, gas with various pressure), difference
Under abutment wall structural condition in combustion process characterisitic parameter measure, be mainly used among fire-fighting teaching and research work, belong to real
Test teaching or scientific research apparatus technical field, in particular to a kind of controllable gas environment, the vertical combustion characteristics experiment of abutment wall structure
Device.
Background technology
Vertical fire spread refers to spread the direction fire spread behavior consistent with gas flow direction, in general vertical fiery climing
It is fast to prolong speed, fire risk is big, is always the important subject in building fire protection field.At present, domestic and foreign scholars are systematically
The influence of width, thickness, angle of inclination and environmental pressure to vertical fire spread is had studied, and achieves certain achievement in research.
But due to architecture structure form diversification, flammable finishing material (such as thermal insulation material) often appears in complicated structure type
Under, such as it is concave, the shape of the mouth as one speaks, T-shaped so that the form of vertical fire spread becomes more complicated.It is domestic at present vertical for combustible
The device of combustion characteristics experiment is only capable of carrying out the survey of characterisitic parameter under a certain specific structure form, specific gas environmental condition
It is fixed, can not realize the flexible switching of structure type, therefore be unable to science, comprehensive reflection combustible different structure form,
The harmfulness of combustion process under gas with various environmental condition.For example, China Mining University's application is inclined for large scale combustible
Oblique combustion characteristics experimental provision, the instrument include experimental bench, analysis and Control cabinet, fuel gas gas bomb, exhaust fume collecting hood and flue five
Part；Experimental bench includes weighing sensor, igniter, embedded thermocouple and pedestal；Adjustable combustible is further included to consolidate
Determine device, the combustible fixing device includes a rectangular body frame, and the both sides of the main body frame are arranged with track,
Gliding in tracks is connected with the crossbeam that can hang combustible；Combustible fixing device angle of inclination can be adjusted by further including
Angle regulator, angle regulator connect with main body frame wherein side axostylus axostyle；Further including can fix with combustible
Device is embedded in, and realizes the adherent experimental plate of the adherent combustion test of combustible.The instrument can flexibly carry out the inclination burning of multi-angle
Experiment (such as angle of inclination is the inclination combustion experiment in the case of 30 °, 45 °, 60 °), quantitative determination specimen surface temperature, quality damage
Stall rate and flue gas toxity, but be only capable of carrying out combustible combustion experiment under a certain specific environment, realize that adherent and two face
The measure of the vertical burning performance parameter of combustible, can not effectively disclose oxygen concentration effect, gas under empty two kinds of simple structure forms
Pressure effect, abutment wall effect are to the influencing mechanism of combustible combustion.It can be seen from the above, existing laboratory apparatus cannot simulate different gas
The experiment condition of body environment, different abutment wall structure types is greatly limited the development of experiment effect, therefore is badly in need of research and development one
Kind can effectively control gaseous environment condition, realize that the vertical combustion characteristics experiment of combustible of flexibly switching abutment wall structure type fills
It puts.
Invention content
To solve above-mentioned existing problem, the vertical burning the present invention provides a kind of controllable gas environment, abutment wall structure is special
Property experimental provision.Invent proposed controllable gas environment, the vertical combustion characteristics experimental provision of abutment wall structure can carry out not
Same size (full-size 0.5m*0.9m) combustible vertical combustion characteristics experiment, can control gas oxygen concentration in combustion chamber,
The environmental conditions such as pressure, while can realize the flexible switching of different abutment wall structure types, examination can be exported in experimentation in real time
The burning performance parameters such as hot-fluid, specimen surface temperature and flue gas toxity that sample surface is received so that the experiment that instrument is provided
Environment is more wide in range.
The technical solution that the present invention takes is as follows：Controllable gas environment of the present invention, the vertical combustion characteristics of abutment wall structure are real
Experiment device, including experimental bench, analysis and Control cabinet, fuel gas gas cylinder group and vacuum pump, fuel gas gas cylinder group and analysis
Switch board connects and provides gas needed for experiment, and analysis and Control cabinet is used to control the mixed proportion of gas, adjusts burning Indoor Air
The pressure of body, processing, analysis and the output of experimental data, experimental bench record experimental data are transferred to analysis and Control cabinet and from analysis
Switch board receives gas, and vacuum pump is connect with experimental bench；
The experimental bench includes combustion chamber, the fixing device of variable abutment wall structure, gas uniform device, thermal-flow sensor
Device, linear ignition device, smoke gas collecting apparatus；The fixing device of variable abutment wall structure is used for adjusting sample size, flexibly switches
Different abutment wall structure types, to realize the vertical combustion experiment of combustible under a variety of abutment wall structural conditions；Gas uniform device is used
In increase mixed gas flow distance, the flow direction of uniform gas, final gas with compared with low flow velocity even into combustion chamber
It is indoor；Heat flow transducer is used to record the changes of heat flux that specimen surface during combustible combustion is received, linear ignition device
For igniting flammable items, smoke gas collecting apparatus uniformly punches design using smoke evacuation plate, is uniformly distributed 14*14 round exhaust smoke hole,
The flue gas that sample burning generates is collected at the top of combustion chamber, adjusts vacuum pump exhaust rate so that smoke gas collecting apparatus shape
Into local decompression, flue gas uniformly discharges combustion chamber by the hole for plate of discharging fume；
Experimental bench is equipped with material surface hot-fluid measurement system, the real-time output module of flue gas toxity and material surface temperature measuring
System can realize that the specimen surface during dynamic monitoring combustible combustion receives hot-fluid, specimen surface temperature and production
The characterisitic parameters such as cigarette flue gas toxity.
The analysis and Control cabinet includes operation panel, gas mixing regulator control system, gas pressure regulator control system, heat flow data
Harvester, flue gas toxity analytical equipment, main frame, computer display, mouse-keyboard；Operation panel is opened including power supply
It closes button, scram button, start to measure button and button ignition switch；Gas mixing regulator control system is used to control nitrogen carrier of oxygen mixing ratio
Example, including nitrogen input pressure knob, oxygen input pressure knob, ratio of nitrogen to oxygen output knob and gas output pressure knob；
Gas pressure regulator control system is used to control the pressure of combustion chamber indoor gas, including pressure controlling control panel, is used to implement negative pressure
With the real-time control of positive pressure；Heat flow data harvester is used to acquire the hot-fluid that the specimen surface of heat flow transducer feedback is received
Data simultaneously export result to computer；Flue gas toxity analytical equipment is used for the analysis of smoke components and exports result to calculating
Machine；Main frame is mainly used for storing the number of hot-fluid harvester, flue gas toxity analytical equipment and the output of temperature measuring system
According to；Computer display is used to show computer analysis data and result.
Further, the fixing device of the variable abutment wall structure includes controllable side wall device and controllable rear wall device, can
It controls side wall device and includes two sidewall structures, there is symmetrical four pairs of thin plates, the setting of thin plate upper and lower inside each sidewall structure
The card slot of thin plate layback, controllable rear wall device is the retaining device that can be moved forward and backward.
Controllable gas environment of the present invention, abutment wall structure the Examination on experimental operation of vertical combustion characteristics experimental provision include such as
Lower step：
(1) select abutment wall structure type, selected according to requirement of experiment and abutment wall constructional device is installed, if you need to carry out it is unilateral by
Limit experiment, the spacing of wall thin-plate devices and sample after adjustment, the adjusting range of spacing is 0mm~400mm；If you need to carry out side
Wall is limited experiment, need to install controllable side wall device according to material thickness, and the quantity of thin plate controls side wall in sidewall structure
Width, the lateral wall width adjusting range of thin material is that (the side wall adjustment width range of thicker material is 30mm to 10mm~50mm
~150mm)；By changing controllable side wall device and controllable rear wall device, it can realize that six kinds of the flexible of different abutment wall structures cut
It changes；
(2) adjusting sample frame size, according to experiment size requirement, adjust combustible fixing device position, when into
It during the relatively narrow dimension test of row, that is, needs to reduce the width of vertical clamping plate, adjust to experiment desired position；It is wider when carrying out
It during dimension test, that is, needs to increase the width of vertical clamping plate, adjust to experiment desired position, maximum experiment size is
0.5m*0.9m；
(3) combustible is directly anchored in adjustable combustible fixing device, completes the suspension work of combustible；
(4) it turns on the power switch, starts gas control system, open nitrogen and oxygen gas cylinder, adjust nitrogen, oxygen input pressure
Power knob adjusts the input ratio of ratio of nitrogen to oxygen knob control nitrogen, oxygen, and export with certain pressure to specified input pressure
Into combustion chamber；
(5) gaseous environment pressure in combustion chamber is set, monitors chamber gas pressure inside in real time by pressure sensor, it will
Pressure data reaches pressure controller into edlin, final to realize combustion by the exhaust rate of PID technical controlling frequency conversion vacuum pumps
Burn the real-time control of chamber gas pressure inside；
(6) computer is opened, opens the analysis software to match with the equipment, analysis software is mainly used for record and tested
The experimental data that heat flow data harvester, temperature data collecting system, flue gas toxity analytical equipment are recorded in journey；
(7) start button in opening operation panel, in real time record experiment in specimen surface received changes of heat flux,
Specimen surface temperature and flue gas toxity；
(8) ventilate 30s, and to ensure to burn, indoor gas reaches specified oxygen concentration, effectively controls the indoor gas of combustion chamber
Body environmental pressure opens methane gas cylinder, presses sample button ignition switch, the igniting of linear ignition device, and light combustible；
(9) combustible catches fire, and closes linear igniter and methane gas cylinder, and flame is crept up along combustible, when flammable
Object prolongs burning-out and finishes, and entire combustion process terminates, and closes nitrogen oxygen cylinder, and experiment the data obtained unification is exported, preserves experimental data,
It shuts down computer, experiment terminates；
(10) analysis of experimental data, hot-fluid, specimen surface temperature and the flue gas toxity that analysis specimen surface is received, leads to
It crosses and the performance parameter in the vertical combustion process of combustible under gas with various environment, different abutment wall structural conditions is quantitatively divided
Analysis, the measure that combustible fire is vertically arranged for effectively proposition prevention and control provide theoretical foundation.
What the present invention obtained using the above structure has the beneficial effect that：At present, there has been no controllable gas environment, abutment wall structures
Vertical combustion characteristics experimental provision.Existing combustion experimental device is only capable of under the conditions of specific atmospheric environment, specific structure form
The vertical combustion characteristics experiment of combustible is carried out, and most of experimental provision is only capable of carrying out the observation reality of the vertical combustion characteristics of combustible
Test, can not to the specific performance parameter during combustible combustion carry out the real time measure, the hot-fluid received such as material surface,
Specimen surface temperature and flue gas toxity.The vertical combustion characteristics experimental provision of controllable gas environment of the present invention, abutment wall structure, 1)
The device can measure combustible under gas with various environment (different oxygen concentrations, gas with various pressure), different abutment wall structural conditions
Vertical spread process, hot-fluid that the material surface in the vertical combustion process of quantitative analysis is received, specimen surface temperature and
The characterisitic parameters such as flue gas toxity；2) main characteristics of the experimental provision are embodied in：Experimental bench adds the fixation of variable abutment wall structure
Device is mainly made of controllable side wall device and controllable rear wall device two parts.Controllable side wall utilizes " layback window " principle, side
There are 4 pairs of symmetrically placed thin plates in wall construction, upper and lower sets the card slot of thin plate layback.When needing side wall, by controllable side wall
Device be mounted on fixing device guide rail on, padded lower guideway gasket can affixed side wall device, pass through layback thin plate
The width to change side wall is counted, is that (research and development are controllable for hot thicker material by 10mm~50mm so as to fulfill lateral wall width range
Side wall device, it is 30mm~150mm that can realize side wall adjustment width)；Wall device is the baffle dress that can be moved forward and backward after controllable
Put, be highly width 500mm, that the baffle of 900mm can be moved forward and backward in orbit when wall after needs, so as into
The vertical combustion characteristics experiment of combustible, distance regulation ranging from 0mm~400mm between rear wall and material when row has rear wall.
By increase controllable side wall device and it is controllable after wall device, can realize that combustible under different abutment wall structural conditions vertically burns
Characteristic test.Analysis and Control cabinet adds gas control system simultaneously, mainly includes gas mixing regulator control system and gas pressure
Regulator control system.The basic principle of gas mixing regulator control system is to utilize the input ratio for matching valve regulation nitrogen and oxygen, uniformly
The output pressure of mixed gas is controlled after mixing by pressure output knob.The basic principle of gas pressure regulator control system is burning
Chamber inner pressure force snesor can monitor chamber gas pressure inside in real time, and pressure data is reached pressure controller into edlin,
By the exhaust rate of PID technical controlling frequency conversion vacuum pumps, the final real-time monitoring for realizing combustion chamber gas pressure inside.Simultaneously
Experimental bench adds gas uniform device, and multilayer globular solids are uniformly placed in testing stand bottom, increase the flow distance of mixed gas,
The flow direction of uniform gas, final gas with compared with low flow velocity even into combustion chamber.The experimental bench adds fume collection
Device uniformly punches design using smoke evacuation plate, is uniformly distributed 14*14 round exhaust smoke hole, and the flue gas that material combustion generates gathers
At the top of combustion chamber, vacuum pump exhaust rate is adjusted so that smoke gas collecting apparatus forms local decompression, and flue gas passes through smoke evacuation
The hole of plate uniformly discharges combustion chamber.At the same time, experimental bench adds hot-fluid measurement system, can monitor material surface in real time
Received changes of heat flux situation provides data foundation to establish vertical fire spread kinetic model.
Description of the drawings
Fig. 1 is that the large scale combustible of China Mining University's research and development tilts combustion characteristics experimental provision structure diagram；
Fig. 2 is the structure diagram of the entire experimental provision of the present invention；
Fig. 3 is the schematic diagram of analysis and Control cabinet of the present invention；
Fig. 4 is the structure diagram of the fixing device of the variable abutment wall structure of the present invention；
Fig. 5 is the structure diagram of the controllable side wall device of the present invention；
Fig. 6 is the schematic diagram of abutment wall structure type of the present invention；
Fig. 7 is the schematic device of abutment wall structure type of the present invention；
Fig. 8 is gas control system schematic diagram of the present invention.
Specific embodiment
With reference to attached drawing, the present invention is described in further details.
Wherein, as shown in Figure 1, the large scale combustible for the research and development of existing China Mining University tilts combustion characteristics experiment
Device, the device can carry out different sizes (full-size 3m*1.5m), differing tilt angles (15 °, 30 °, 45 °, 60 °, 75 ° with
And 90 °) combustible tilt (vertical) combustion characteristics and test, experimentation can to the mass loss rate of combustible combustion,
Flue gas toxity, specimen surface temperature are exported in real time, but are only capable of in a certain specific gas environment, certain edges thereof wall construction form item
Combustion experiment is carried out under part, can not realize gas with various environment (different oxygen concentrations, gas with various pressure), different abutment wall structures
Etc. various experimental conditions.
As shown in Fig. 2, the vertical combustion characteristics experimental provision of controllable gas environment of the present invention, abutment wall structure, feature exist
In, including experimental bench 1, analysis and Control cabinet 2, fuel gas gas cylinder group 3 and vacuum pump 4, fuel gas gas cylinder group 3 and analysis
Switch board 2 connects and provides gas needed for experiment, and analysis and Control cabinet 2 is used to control the mixed proportion of gas, adjusts in combustion chamber
The pressure of gas, processing, analysis and the output of experimental data, experimental bench 1 record experimental data be transferred to analysis and Control cabinet 2 and from
Analysis and Control cabinet 2 receives gas, and vacuum pump 4 is connect with experimental bench 1；
The experimental bench 1 includes combustion chamber 5, the fixing device 6 of variable abutment wall structure, gas uniform device 7, hot-fluid and passes
Sensor 8, linear ignition device 9, smoke gas collecting apparatus 10；The fixing device 6 of variable abutment wall structure is used for adjusting sample size, spirit
It is living to switch different abutment wall structure types, to realize the vertical combustion experiment of combustible under a variety of abutment wall structural conditions；Gas is uniform
Device 7 is used to increasing the flow distance of mixed gas, the flow direction of uniform gas, final gas with compared with low flow velocity even into
In combustion chamber；Heat flow transducer 8 is used to record the changes of heat flux that specimen surface during combustible combustion is received, Linear Points
Fiery device 9 is used for igniting flammable items, and smoke gas collecting apparatus 10 uniformly punches design using smoke evacuation plate, is uniformly distributed 14*14 circle
Shape exhaust smoke hole, the flue gas that sample burning generates are collected at the top of combustion chamber, adjust vacuum pump exhaust rate so that flue gas is received
Acquisition means form local decompression, and flue gas uniformly discharges combustion chamber by the hole for plate of discharging fume；
As shown in figure 3, the analysis and Control cabinet 2 includes operation panel 11, gas mixing regulator control system 12, gas pressure tune
Control system 13, heat flow data harvester 14, flue gas toxity analytical equipment 15, main frame 16, computer display 17, mouse
Mark keyboard 18；Operation panel 11 includes power switch button, scram button, starts to measure button and button ignition switch；Gas mixing
Regulator control system 12 is for controlling nitrogen carrier of oxygen mixed proportion, including nitrogen input pressure knob, oxygen input pressure knob, nitrogen oxygen
Ratio exports knob and gas output pressure knob；Gas pressure regulator control system 13 is used to control the pressure of combustion chamber indoor gas
Power including pressure controlling control panel, is used to implement the real-time control of negative pressure and positive pressure；Heat flow data harvester 14 is used to acquire
The heat flow data that is received of specimen surface of heat flow transducer feedback simultaneously exports result to main frame 16；Flue gas toxity point
Analysis apparatus 15 is used for the analysis of smoke components and exports result to main frame 16；Main frame 16 is mainly used for storing
The data of hot-fluid harvester, flue gas toxity analytical equipment and the output of temperature measuring system；Computer display 17 is used to show
Computer analyzes data and result.
Wherein, as shown in figure 4, the fixing device 6 of the variable abutment wall structure include controllable side wall device 19 and it is controllable after
Wall device 20, controllable side wall device 19 include two sidewall structures, have symmetrical four pairs of thin plates 21 inside each sidewall structure,
As shown in figure 5, the card slot of 21 upper and lower of thin plate setting 21 layback of thin plate, controllable rear wall device 20 is the baffle dress that can be moved forward and backward
It puts.Controllable side wall utilizes " layback window " principle, and when needing side wall, controllable side wall device 19 is mounted on to the guide rail of fixing device
On, controllable side wall device 19 can be fixed by having padded the gasket of lower guideway, change the width of side wall by the number of layback thin plate 21
Degree is that (research and development can be realized 10mm~50mm for the controllable side wall device of hot thicker material so as to fulfill lateral wall width range
Side wall adjustment width is 30mm~150mm)；Wall device 20 is the retaining device that can be moved forward and backward after controllable, when wall after needs,
Width, which is 500mm, is highly the baffle of 900mm to be moved forward and backward in orbit, combustible during so as to carry out rear wall
Vertical combustion characteristics experiment, distance regulation ranging from 0mm~400mm between rear wall and sample.By increasing controllable side wall
Device 19 and controllable rear wall device 20, and then can realize that the vertical aptitude to burn of combustible is real under different abutment wall structural conditions
It tests, as shown in fig. 6-7.
As shown in fig. 6-7, this experimental provision can flexibly switch six kinds of abutment wall structures, to realize different abutment wall structure types
Under the conditions of the experiment of combustible vertical combustion characteristics.Testing abutment wall structure is respectively：(a) sky is faced in both sides, empty, (c) is faced in (b) unilateral side has
Side abutment wall, (d) have rear wall and side abutment wall, (e) to have both sides abutment wall, (f) concave structure.
As shown in figure 8, gas control system of the present invention mainly includes gas mixing regulator control system 12 and gas pressure controlling
13 two parts of system, the basic principle of gas mixing regulator control system 12 are to utilize the input ratio for matching valve regulation nitrogen and oxygen
Example uniformly controls the output pressure of mixed gas by pressure output knob after mixing；Gas pressure regulator control system 13 it is basic
Principle can monitor chamber gas pressure inside in real time for combustion chamber pressure sensor, and pressure data is reached pressure controller
It is final to realize the real-time of combustion chamber gas pressure inside by the exhaust rate of PID technical controlling frequency conversion vacuum pumps into edlin
Regulation and control.
Controllable gas environment of the present invention, abutment wall structure the Examination on experimental operation of vertical combustion characteristics experimental provision include such as
Lower step：
(1) select abutment wall structure type, selected according to requirement of experiment and abutment wall constructional device is installed, if you need to carry out it is unilateral by
Limit experiment, the spacing of wall thin-plate devices and sample after adjustment, the adjusting range of spacing is 0mm~400mm；If you need to carry out side
Wall is limited experiment, need to install controllable side wall device according to material thickness, and the quantity of thin plate controls side wall in sidewall structure
Width, the lateral wall width adjusting range of thin material is that (the side wall adjustment width range of thicker material is 30mm to 10mm~50mm
~150mm)；By changing controllable side wall device and controllable rear wall device, it can realize that six kinds of the flexible of different abutment wall structures cut
It changes；
(2) adjusting sample frame size, according to experiment size requirement, adjust combustible fixing device position, when into
It during the relatively narrow dimension test of row, that is, needs to reduce the width of vertical clamping plate, adjust to experiment desired position；It is wider when carrying out
It during dimension test, that is, needs to increase the width of vertical clamping plate, adjust to experiment desired position, maximum experiment size is
0.5m*0.9m；
(3) combustible is directly anchored in adjustable combustible fixing device, completes the suspension work of combustible；
(4) it turns on the power switch, starts gas control system, open nitrogen and oxygen gas cylinder, adjust nitrogen, oxygen input pressure
Power knob adjusts the input ratio of ratio of nitrogen to oxygen knob control nitrogen, oxygen, and export with certain pressure to specified input pressure
Into combustion chamber；
(5) gaseous environment pressure in combustion chamber is set, monitors chamber gas pressure inside in real time by pressure sensor, it will
Pressure data reaches pressure controller into edlin, final to realize combustion by the exhaust rate of PID technical controlling frequency conversion vacuum pumps
Burn the real-time control of chamber gas pressure inside；
(6) computer 15 is opened, opens the analysis software to match with the equipment, analysis software is mainly used for record experiment
The experimental data that heat flow data harvester, temperature data collecting system, flue gas toxity analytical equipment are recorded in the process；
(7) start button in opening operation panel 11, the hot-fluid that the specimen surface in record experiment in real time is received become
Change, specimen surface temperature and flue gas toxity；
(8) ventilate 30s, and to ensure to burn, indoor gas reaches specified oxygen concentration, effectively controls the indoor gas of combustion chamber
Body environmental pressure opens methane gas cylinder, presses sample button ignition switch, the igniting of linear ignition device, and light combustible；
(9) combustible catches fire, and closes linear igniter and methane gas cylinder, and flame is crept up along combustible, when flammable
Object prolongs burning-out and finishes, and entire combustion process terminates, and closes nitrogen oxygen cylinder, and experiment the data obtained unification is exported, preserves experimental data,
It shuts down computer, experiment terminates；
(10) analysis of experimental data, hot-fluid, specimen surface temperature and the flue gas toxity that analysis specimen surface is received, leads to
It crosses and the performance parameter in the vertical combustion process of combustible under gas with various environment, different abutment wall structural conditions is quantitatively divided
Analysis, the measure that combustible fire is vertically arranged for effectively proposition prevention and control provide theoretical foundation.
The present invention and embodiments thereof are described above, this description is no restricted, attached shown in figure
Only one of embodiments of the present invention, practical structure are not limited thereto.All in all if the ordinary skill of this field
Personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution phase
As frame mode and embodiment, be within the scope of protection of the invention.
Claims (3)
1. a kind of vertical combustion characteristics experimental provision of controllable gas environment, abutment wall structure, which is characterized in that including experimental bench,
Analysis and Control cabinet, fuel gas gas cylinder group and vacuum pump, fuel gas gas cylinder group connect with analysis and Control cabinet and provide reality
Required gas is tested, analysis and Control cabinet is used to control the mixed proportion of gas, adjusts the pressure of burning indoor gas, experimental data
Processing, analysis and output, experimental bench record experimental data are transferred to analysis and Control cabinet and receive gas, vacuum from analysis and Control cabinet
Pump is connect with experimental bench；
The experimental bench includes combustion chamber, the fixing device of variable abutment wall structure, gas uniform device, heat flow transducer, line
Property igniter, smoke gas collecting apparatus；The fixing device of variable abutment wall structure is used for adjusting sample size, flexibly switches different sides
Wall construction form, to realize the vertical combustion experiment of combustible under a variety of abutment wall structural conditions；Gas uniform device is used to increase
The flow distance of mixed gas, the flow direction of uniform gas, final gas with compared with low flow velocity even into combustion chamber；Heat
Flow sensor is used to recording the changes of heat flux that specimen surface during combustible combustion is received, and linear ignition device is for igniting
Combustible, smoke gas collecting apparatus uniformly punch design using smoke evacuation plate, are uniformly distributed 14*14 round exhaust smoke hole, sample burning
The flue gas of generation is collected at the top of combustion chamber, adjusts vacuum pump exhaust rate so that it is negative that smoke gas collecting apparatus forms part
Pressure, flue gas uniformly discharge combustion chamber by the hole for plate of discharging fume；
The analysis and Control cabinet includes operation panel, gas mixing regulator control system, gas pressure regulator control system, heat flow data acquisition
Device, flue gas toxity analytical equipment, main frame, computer display, mouse-keyboard；Operation panel is pressed including power switch
Button, scram button start to measure button and button ignition switch；Gas mixing regulator control system is used to control nitrogen carrier of oxygen mixed proportion,
Including nitrogen input pressure knob, oxygen input pressure knob, ratio of nitrogen to oxygen output knob and gas output pressure knob；Gas
Pressure regulation system is used to control the pressure of combustion chamber indoor gas, including pressure controlling control panel, be used to implement negative pressure with just
The real-time control of pressure；Heat flow data harvester is used to acquire the heat flow data that the specimen surface of heat flow transducer feedback is received
And result is exported to computer；Flue gas toxity analytical equipment is used for the analysis of smoke components and exports result to computer；
Main frame is mainly used for storing the data of hot-fluid harvester, flue gas toxity analytical equipment and the output of temperature measuring system；
Computer display is used to show computer analysis data and result.
2. the vertical combustion characteristics experimental provision of a kind of controllable gas environment according to claim 1, abutment wall structure, special
Sign is that the fixing device of the variable abutment wall structure includes controllable side wall device and controllable rear wall device, controllable side wall device
Including two sidewall structures, there are symmetrical four pairs of thin plates inside each sidewall structure, thin plate upper and lower setting thin plate layback
Card slot, controllable rear wall device is the retaining device that can be moved forward and backward.
3. the vertical combustion characteristics experimental provision of a kind of controllable gas environment according to claim 1, abutment wall structure, special
Sign is, the controllable gas environment, abutment wall structure vertical combustion characteristics experimental provision Examination on experimental operation include it is as follows
Step：
(1) abutment wall structure type is selected, is selected according to requirement of experiment and abutment wall constructional device is installed, it is unilateral limited real if you need to carry out
It tests, the spacing of wall thin-plate devices and sample after adjustment, the adjusting range of spacing is 0mm~400mm；If you need to carry out side wall by
Limit experiment needs to install controllable side wall device according to material thickness, and the quantity of thin plate controls the width of side wall in sidewall structure,
The lateral wall width adjusting range of thin material be 10mm~50mm (thicker material side wall adjustment width range be 30mm~
150mm)；By changing controllable side wall device and controllable rear wall device, the flexible switching of six kinds of different abutment wall structures can be realized；
(2) adjusting sample frame size, according to experiment size requirement, adjust combustible fixing device position, when carry out compared with
It when narrow dimension is tested, that is, needs to reduce the width of vertical clamping plate, adjust to experiment desired position；When the wider size of progress
It during experiment, that is, needs to increase the width of vertical clamping plate, adjust to experiment desired position, maximum experiment size is 0.5m*
0.9m；
(3) combustible is directly anchored in adjustable combustible fixing device, completes the suspension work of combustible；
(4) it turns on the power switch, starts gas control system, open nitrogen and oxygen gas cylinder, adjust nitrogen, the rotation of oxygen input pressure
Button adjusts the input ratio of ratio of nitrogen to oxygen knob control nitrogen, oxygen, and be output to combustion with certain pressure to specified input pressure
It burns in chamber；
(5) gaseous environment pressure in combustion chamber is set, chamber gas pressure inside is monitored in real time by pressure sensor, by pressure
Data reach pressure controller into edlin, by the exhaust rate of PID technical controlling frequency conversion vacuum pumps, finally realize combustion chamber
The real-time control of gas pressure inside；
(6) computer is opened, opens the analysis software to match with the equipment, analysis software is mainly used for recording in experimentation
The experimental data that heat flow data harvester, temperature data collecting system, flue gas toxity analytical equipment are recorded；
(7) start button in opening operation panel, changes of heat flux, the sample that the specimen surface in record experiment in real time is received
Surface temperature and flue gas toxity；
(8) ventilate 30s, and to ensure to burn, indoor gas reaches specified oxygen concentration, effectively controls the indoor Ring of combustion chamber
Border pressure opens methane gas cylinder, presses sample button ignition switch, the igniting of linear ignition device, and light combustible；
(9) combustible catches fire, and closes linear igniter and methane gas cylinder, and flame is crept up along combustible, when combustible prolongs
It burns down and finishes, entire combustion process terminates, and closes nitrogen oxygen cylinder, and experiment the data obtained unification is exported, experimental data is preserved, closes
Computer, experiment terminate；
(10) analysis of experimental data, hot-fluid, specimen surface temperature and the flue gas toxity that analysis specimen surface is received, by right
Performance parameter under gas with various environment, different abutment wall structural conditions in the vertical combustion process of combustible carries out quantitative analysis, is
Effectively propose that prevention and control are vertically arranged the measure offer theoretical foundation of combustible fire.
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Application publication date: 20180615 |