CN203644291U - Low-pressure airplane cargo bay fire experiment simulation device - Google Patents
Low-pressure airplane cargo bay fire experiment simulation device Download PDFInfo
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- CN203644291U CN203644291U CN201320792113.0U CN201320792113U CN203644291U CN 203644291 U CN203644291 U CN 203644291U CN 201320792113 U CN201320792113 U CN 201320792113U CN 203644291 U CN203644291 U CN 203644291U
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Abstract
The utility model relates to a low-pressure airplane cargo bay fire experiment simulation device. The device comprises an experiment bench body, which is an enclosed space. A hatch door and an observation window are arranged on the experiment bench body. A simulated fire source, an electronic balance, a thermocouple probe string, a hot-wire anemometer probe string and a smoke component measurement probe string are arranged inside the experiment bench body. A ventilation system, a vacuum system and a smoke exhaust system are connected to the experiment bench body and to a measurement and control system. The device is a full-scale experiment bench for comprehensive studies on smoke movement rules in a limited space of a low-pressure airplane cargo bay, fire detection, fire extinguishing and the like. The device can adjust in-bay pressure changes, keep in-bay air flow evenly distributed under a normal pressure or a low pressure, and maintain dynamic balance of pressure during in-bay fire source burning. Besides, the device is safe and reliable, with easy operation and low production costs.
Description
Technical field
The utility model relates to a kind of infrabar aircraft hold fire test analogue means.
Background technology
In recent years, Chinese Aviation Transportation industry has obtained fast development, and airfreight becomes the important sources of civil aircraft income increase, and thing followed cargo hold fire safety evaluating problem has caused people's extensive concern.
Aircraft hold is as special mobile restricted space, because the different fire smoke that makes of the disposing way of space structure and goods is very complicated.Cargo hold fire has the characteristic of general mobile restricted space fire, but with the difference in other mobile restricted spaces be its yardstick in the longitudinal direction much larger than its height and Width on yardstick, and except outlet of cargo door, again without other ventilating openings, the cigarette, the heat that while making fire, produce are difficult for discharging, the combustible around that ignites, and the continuous accumulation of heat makes the hot system imbalance of cargo hold, cause the temperature in cargo hold to rise sharply, compared with other mobile restricted spaces, Hong combustion more early occurs.Once Hong combustion occurs, and fire spreads fast to whole space, makes whole cargo hold sink into the sea of fire, all combustibles surface all takes fire, and very easily causes fatal crass's accident.
Compared with smoke detection conditions for equipment use in surface structures, owing to jolting and vibrating, in cargo hold, in air, produce a large amount of fire undesired signals such as dust granule, goods fiber and animal down, reporting by mistake extremely easily appears in cargo hold smoke detector.According to the people's such as the David Blake of FAA technique center statistics, in average every 200 aircraft hold fire alarms report, only having is for 1 time kidney-yang police.At present because the wrong report of cargo hold fire detecting system causes annual about 40 to 60 forced landings.Wrong report not only causes huge economic loss to airline, and has improved the possibility that pernicious aircraft accident occurs.The characteristics of motion of cargo hold fire and flue gas thereof, flue gas are surveyed and fire extinguishing becomes the focus that people pay close attention to.Along with the increase of flying height, the pressure decreased in cargo hold, generally, civil aircraft is the highest in the flight of ten thousand metres left and right, and at this moment the pressure in cargo hold is approximately 0.83 standard atmospheric pressure; Therefore, ground experiment chamber research aircraft cargo hold under low-pressure state when breaking out of fire smoke movement rule, detection and fire extinguishing be necessary for the overall safety that guarantees aircraft.
The ventilating system arranging in current most low pressure vessels can not make the interior air-flow of container under normal pressure and low pressure be evenly distributed, affect the variation of parameter in container, for example: normal pressure and the low pressure air-flow maldistribution in cargo hold of getting off the plane, the smoke particle skewness generating can make breaking out of fire time, and then affect sensitivity and the response time of smoke detector in cargo hold; A kind of intelligent low-atmospheric pressure test equipment (publication number: CN103324223A) provides a kind of ventilating system, ventilating system is made up of the centrifugal wind wheel being arranged in vacuum chamber outer circulation motor and vacuum chamber, the output terminal of circulation motor is connected with centrifugal wind wheel by major axis, and circulation motor adopts magnetic fluid rotation axis and vacuum chamber to be tightly connected.This ventilating system is for the regular low pressure vessel successful of small volume, but inapplicable and long and narrow irregular large volume low pressure vessel.
Foreign scholar has carried out multi-form experimental study according to the feature of different aircraft holds and some predetermined object for smoke movement rule in aircraft hold, but the domestic blank that is still.2006, the cargo hold of the passenger plane that US Federal Aviation Administration (FAA) was generally used at that time for the U.S. has carried out fire test research, cargo hold model scale modest ability used is 6.73m, be highly 1.37m, top width is 3.17m, bottom width 1.17m, is a kind of experimental study of locality, has probed into respectively the standard analog burning things which may cause a fire disaster for the authentication of cargo hold smoke detection system from aspects such as HRR, the amount of being fuming and mass loss rates.The people such as David Blake in 2008 are 14.02m to cargo hold model scale modest ability respectively, be highly 1.67m, top width is 4.37m, bottom width 3.38m and cargo hold model scale modest ability are 6.73m, be highly 1.37m, top width is 3.17m, and the flue gas that two kinds of type point scenes of bottom width 1.17m have been carried out cargo hold transports rule modeling effort.The variation that more than research not only cannot adjusting cabin internal pressure, and in cabin, do not have if the equally distributed ventilating system of air-flow in cabin under normal pressure and infrabar, add the restriction of yardstick, focus mostly in partial model research, cannot really carry out the experimental study of infrabar aircraft hold smoke movement rule.Therefore the aircraft hold fire simulation experimental apparatus of, setting up 1:1 in ground experiment chamber is significant for the research of carrying out this restricted clearance of aircraft hold fire development process, smoke movement rule and Hong combustion process under low-pressure state.
Summary of the invention
The purpose of this utility model is to solve above-mentioned deficiency and a kind of infrabar aircraft hold fire test analogue means is provided, this analogue means can not only adjusting cabin internal pressure variation, and can make under normal pressure and operating on low voltage state air-flow in cabin be evenly distributed, maintain the pressure mobile equilibrium in burning things which may cause a fire disaster combustion process in cabin, in addition, this simulating plant operations is convenient, safe and reliable, cost of manufacture is lower, can be at ground experiment chamber modeling effort aircraft hold smoke movement rule and fire detector response mechanism when breaking out of fire under low-pressure state, research and development are suitable for smoke-detecting system and the fire extinguishing system of aircraft hold.
For achieving the above object, the utility model has adopted following technical scheme: comprise the experiment table main body matching with real aircraft cargo hold size, described experiment table main body is an enclosure space, described experiment table main body is provided with hatch door, view window, the inside of experiment table main body is provided with simulation fire source, electronic balance, thermocouple probe string, hot line wind speed probe string and smoke components measuring probe string, in described experiment table main body, be connected with ventilating system, vacuum system and smoke evacuation system, described ventilating system, vacuum system and smoke evacuation system are connected with TT&C system.
Described experiment table main body is welded by ceiling, floor, front end-plate, end plate, left side wall and right side wall, and described hatch door is arranged on right side wall.
Described ventilating system comprises and is arranged on the air vent on end plate and is fixed on the ventilation duct on ceiling, described ventilation duct is stainless steel ventilation duct, and one end of ventilation duct is connected with air vent, the other end of ventilation duct is closing end, described ventilation duct is put along the circumferential hoop winding of ceiling, on the tube wall on described ventilation duct sensing floor, multiple air outlets are evenly set, described ventilation duct inside is radially provided with homogenizing plate along it, on described homogenizing plate, be evenly distributed with multiple air outlet openings, and described homogenizing plate is arranged on the inlet end of ventilation duct, described air vent is connected with the first blower fan by the first ventilating duct, on the first described ventilating duct, be provided with successively the first stop valve, the first electric control valve and orifice flowmeter, described orifice flowmeter is connected with the outlet of the first blower fan, on the first described ventilating duct, also bypass has branch road, described branch road is provided with second stop valve in parallel with the first stop valve and the first electric control valve, described orifice flowmeter is connected with the input end of TT&C system, the first described electric control valve is connected with the output terminal of TT&C system.
Described vacuum system comprises the aspirating hole being arranged on left side wall, described aspirating hole is connected with vacuum pump by the second ventilating duct, on the second described ventilating duct, be provided with successively vacuum control check valve, the second electric control valve and frequency-variable controller, described frequency-variable controller is connected with vacuum delivery side of pump, on described front end-plate, be also provided with pressure vacuum gauge, described pressure vacuum gauge is connected with the input end of TT&C system, the second described electric control valve, frequency-variable controller is connected with the output terminal of TT&C system, the frequency of described frequency-variable controller is directly proportional to the rotating speed of vacuum pump and rate of air sucked in required.
Described smoke evacuation system comprises the exhaust smoke hole being arranged on ceiling, and described exhaust smoke hole is connected with the second blower fan by smoke discharging pipe, and described smoke discharging pipe is provided with manually operated control valve.
Described ceiling, floor, front end-plate, end plate, left side wall and right side wall are corrosion resistant plate, described view window is separately positioned on front end-plate, end plate, left side wall and the right side wall of experiment table main body, described view window is made up of the flame resistant glass of resistance to 1000 ℃ of high temperature, described view window outside is provided with video camera, and described video camera is connected with the input end of TT&C system.
Described simulation fire source is arranged on food tray, and described food tray is placed on floor, is provided with successively from top to bottom fire-proof asbestos plate, heat insulation steelframe and electronic balance between described food tray and floor, and described electronic balance is connected with the input end of TT&C system.
Described thermocouple probe string comprises the second thermocouple probe string that is parallel to the first thermocouple probe string of ceiling setting and arranges perpendicular to ceiling, the first described thermocouple probe string is evenly arranged at least three along the length direction of ceiling, on every described the first thermocouple probe string, be provided with multiple the first thermocouple probes, the first thermocouple probe interval of described simulation fire source top is tight, and the first thermocouple probe interval of simulation fire source both sides is loose; The second described thermocouple probe string is arranged at least three along the short transverse interval of ceiling, the second described thermocouple probe string is distributed in top and the both sides of simulation fire source, every described the second thermocouple probe string from up to down arranges multiple the second thermocouple probes, spacing between described multiple thermocouple probes from up to down increases progressively setting, and described thermocouple probe string is connected with the input end of TT&C system.
Described experiment table main body below is provided with supporting leg, is also provided with high temperature resistant Grille lamp on described ceiling, and described high temperature resistant Grille lamp is distributed on the center line of ceiling length direction.
Described front end-plate, end plate, left side wall and right side wall and the center of floor connecting place are respectively equipped with cable duct, be provided with and gather and power consumption cable in cable duct, and described cable is connected with TT&C system.
Described simulation fire source is methyl alcohol oil sump fire and fragrant post, and methyl alcohol oil sump fire and fragrant post spacing are between the two 40～50cm.
Described hot line wind speed probe string and smoke components measuring probe string are all arranged on ceiling and can move along the length direction of ceiling, and described smoke components measuring probe string comprises and is the O that vertical sets gradually
2, CO, CO
2and H
2concentration probe, described hot line wind speed probe string comprises that 4 are the hot line wind speed probe that vertical is arranged and spacing is 15cm, described hot line wind speed probe string is connected with the input end of TT&C system with smoke components measuring probe string.
As shown from the above technical solution, the utility model is first opened vacuum system, when vacuum system data meet experiment condition instantly time, open ventilating system, and regulate the air inflow of ventilating system by TT&C system, fixing wind speed while reaching experimental design numerical value, start TT&C system, gather thermopair and survey string, hot line wind speed is surveyed string, gas componant is measured and is surveyed string, the information that tensimeter and electronic balance transmit, make simulation fire source on fire, close hatch door, in the time that simulation fire source burning arrives setting-up time, close TT&C system, vacuum system and ventilating system, start smoke evacuation system.This analogue means can obtain the information such as gas concentration and the quality of burning things which may cause a fire disaster in the temperature field, velocity field, flue gas of experiment table body interior, can study the response lag of detector, Hong combustion anti-raw critical condition and the combustion rate of burning things which may cause a fire disaster etc.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the longitudinal profile schematic diagram of the utility model experiment table main body;
Fig. 3 is the vertical view on floor in the utility model experiment table main body;
Fig. 4 is the upward view of ceiling and ventilation duct in the utility model experiment table main body;
Fig. 5 is the A-A cut-open view of Fig. 4.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As Fig. 1, Fig. 2, a kind of infrabar aircraft hold fire test analogue means shown in Fig. 3, comprise the experiment table main body 1 matching with real aircraft cargo hold size, experiment table main body 1 is an enclosure space, experiment table main body 1 is provided with hatch door 11, view window 12, the inside of experiment table main body 1 is provided with simulation fire source 2, electronic balance 24, thermopair is surveyed string 3, string 4 surveyed by hot-wire anemometer and gas composition measurement is surveyed string 5, in experiment table main body 1, be connected with ventilating system 6, vacuum system 7 and smoke evacuation system 8, ventilating system 6, vacuum system 7 and smoke evacuation system 8 are connected with TT&C system.TT&C system comprises the signal acquisition module for gathering the information such as temperature field, velocity field, gas concentration and pressure in experiment table main body 1, for the data analysis module that institute's Information Monitoring is analyzed.
Further, experiment table main body 1 is welded by ceiling 13, floor 14, front end-plate 15, end plate 16, left side wall 17 and right side wall 18, the inwall of experiment table main body 1 is provided with heat-insulation layer, hatch door 11 is arranged on right side wall 18, hatch door 11 adopts hinge to install, and be connected with experiment table body seal with O-ring seal by silicon bi-layer rubber, hatch door 11 supports by Pneumatic power support lever.
Further, ceiling 13, floor 14, front end-plate 15, end plate 16, left side wall 17 and right side wall 18 are corrosion resistant plate, view window 12 is separately positioned on front end-plate 15, end plate 16, left side wall 17 and the right side wall 18 of experiment table main body 1, view window 12 is made up of the flame resistant glass of resistance to 1000 ℃ of high temperature, view window 12 outsides are provided with video camera, and video camera is connected with the input end of TT&C system.Experiment table main body 1 can adopt steel joist to build, and between keel, rivets into entirety with link support, between corrosion resistant plate and keel, remakes encapsulation process.Meanwhile, the outside 12 of four view windows is equipped with video camera, to record whole experimentation.
Further, ventilating system 6 comprises the air vent 61 being arranged on end plate 16 and is fixed on the ventilation duct 9 on ceiling 13, ventilation duct 9 is stainless steel ventilation duct, and one end of ventilation duct 9 is connected with air vent 61, the other end of ventilation duct 9 is closing end, ventilation duct 9 is put along the circumferential hoop winding of ceiling 13, ventilation duct 9 points on the tube wall on floor 14 multiple air outlets 91 is evenly set, namely the downward tube wall of ventilation duct is provided with multiple air outlets 91, ventilation duct 9 inside are radially provided with homogenizing plate 92 along it, on homogenizing plate 92, be evenly distributed with multiple air outlet openings 93, and homogenizing plate 92 is arranged on the entrance of ventilation duct 9, air vent 61 is connected with the first blower fan 63 by the first ventilating duct 62, on the first ventilating duct 62, be provided with successively the first stop valve 64, the first electric control valve 65 and orifice flowmeter 66, orifice flowmeter 66 is connected with the outlet of the first blower fan 63, on the first ventilating duct 62, also bypass has branch road 67, branch road 67 is provided with second stop valve 68 in parallel with the first stop valve 64 and the first electric control valve 65, orifice flowmeter 66 is connected with the input end of TT&C system, the first electric control valve 65 is connected with the output terminal of TT&C system.Specifically, air vent can need to carry out manually opened or closing according to experimental design, the first ventilating duct 62 is connected with experiment table main body 1 by flange, the wind that the first blower fan 63 blows out successively enters ventilation duct 9 by the first ventilating duct 62, air vent 61, after being uniformly distributed air-flow, the homogenizing plate 92 in ventilation duct 9 discharged by the air outlet 91 of ventilation duct 9 again, air-flow in cabin is evenly distributed, so that the airflow pattern of Reality simulation aircraft.Air-flow orifice flowmeter 66 is used for measuring air inlet speed, and send the resh air requirement signal recording to TT&C system and process, then TT&C system is controlled air inflow by the switching and the opening degree that regulate the first electric control valve 65, and by signal feedback to test macro.
Further, vacuum system 7 comprises the aspirating hole 71 being arranged on left side wall 17, aspirating hole 71 is connected with vacuum pump 73 by the second ventilating duct 72, on the second ventilating duct 72, be provided with successively vacuum control check valve 74, the second electric control valve 75 and frequency-variable controller 76, frequency-variable controller 76 is connected with the outlet of vacuum pump 73, on front end-plate 15, be also provided with pressure vacuum gauge 77, pressure vacuum gauge 77 is connected with the input end of TT&C system, the second electric control valve 75, frequency-variable controller 76 is connected with the output terminal of TT&C system, the frequency of frequency-variable controller 76 is directly proportional to rotating speed and the rate of air sucked in required of vacuum pump 73.Specifically, the second ventilating duct 72 is connected with experiment table main body 1 by flange, aspirating hole can need to carry out manually opened or closing according to experimental design, the speed of exhaust of frequency-variable controller control vacuum pump, the frequency of frequency-variable controller is adjustable, its frequency should be directly proportional to the rotating speed of vacuum pump and rate of air sucked in required, be subject to TT&C system control according to setup parameter, TT&C system is by regulating the aperture of the second electric control valve 75 and the frequency of frequency-variable controller 76 to change the speed of exhaust, pressure vacuum gauge is used for survey room internal pressure, pressure vacuum gauge is given TT&C system by the pressure signal recording and is processed, then TT&C system is carried out control cabinet internal pressure by the switching and the opening degree that regulate the second electric control valve, and by signal feedback to TT&C system.Specifically, in simulation fire source combustion process, the force value that pressure vacuum gauge 77 shows raises while exceeding certain limit, vacuum pump 73 can operation make pressure decreased, the force value showing when pressure vacuum gauge 77 reduces while exceeding certain limit, and solenoid valve can move, and can put into part air pressure is raise in aspirating hole 71, so just realize the pressure mobile equilibrium in combustion process, experimental pressure error is controlled in tolerance interval.
Further, smoke evacuation system 8 comprises the exhaust smoke hole 81 being arranged on ceiling 13, and exhaust smoke hole 81 is connected with the second blower fan 83 by smoke discharging pipe 82, and smoke discharging pipe 82 is provided with manually operated control valve.Exhaust smoke hole 81 is non-existent on actual aircraft hold, and the utility model is just used in order to test loose cigarette.Meanwhile, smoke evacuation system 8 can doublely do air compensating system, and air compensating system refers to that this device is not doing burning test, and while only doing low voltage experiment, after test, toward the inner tonifying Qi use of cabin body, object is to make it to recover normal pressure.
Further, simulation fire source 2 is arranged on food tray 21, and food tray is placed on floor 14, is provided with successively from top to bottom fire-proof asbestos plate 22, heat insulation steelframe 23 and electronic balance 24 between food tray 21 and floor 14, and electronic balance 24 is connected with the input end of TT&C system.Electronic balance 24 is used for measuring the mass loss rate of burning things which may cause a fire disaster and then indirectly measures the HRR of burning things which may cause a fire disaster, because fuel combustion in experimentation will be emitted a large amount of heat, for preventing that excess Temperature from damaging electronic balance 24, heat insulation steelframe 23 need to be arranged in to the top of electronic balance 24 scales pan, because food tray 21 is metal manufacture, so fire-proof asbestos plate 22 also will be laid in the top of heat insulation steelframe 23.
Further, simulation fire source 2 is methyl alcohol oil sump fire and fragrant post, and methyl alcohol oil sump fire and fragrant post spacing are between the two 40～50cm.Can it be glowed first ignition incense post, the smoke modelling fire smoke that the fragrant post that recycling is glowed produces, then light methyl alcohol, when methyl alcohol burning, entrainment air, the flue gas that fragrant post is ordered about in the buoyancy producing flows in experiment table main body, the so comparatively clearly motion of simulated fire flue gas in experiment table main body.Simulation fire source 2 also can adopt the thermal decomposition of wood standard fuels such as fire, cotton cord hidden combustion fire, polyurethane plastics fire that ignite to simulate actual combustible.
Further, thermocouple probe string 3 comprises that being parallel to the first thermocouple probe string 31 that ceiling 13 arranges and the second thermocouple probe string 32, the first thermocouple probe strings that arrange perpendicular to ceiling 13 is used for measuring ceiling environment temperature and distributes; The second thermocouple probe string is used for measuring the Temperature Distribution of plume center line and simulation fire source both sides.The first thermocouple probe string 31 is evenly arranged at least three along the length direction of ceiling 13, on every the first thermocouple probe string 31, be provided with multiple the first thermocouple probes, the first thermocouple probe interval of simulation fire source 2 tops is tight, the first thermocouple probe interval of simulation fire source 2 both sides is loose, within the scope of the 1m namely extending to both sides centered by simulation fire source 2, be to arrange first thermocouple probe at interval of 0.5m, all the other positions are to arrange first thermocouple probe at interval of 1m, between the first thermocouple probe string 31 and ceiling, also there is gap simultaneously, preferably, gap is generally in 0.04m left and right.The second thermocouple probe string 32 is arranged at least three along the short transverse interval of ceiling 13, the second thermocouple probe string 32 is distributed in top and the both sides of simulation fire source 2, every the second thermocouple probe string 32 from up to down arranges multiple the second thermocouple probes 33, spacing between multiple thermocouple probes 33 from up to down increases progressively setting, in other words, the first thermocouple probe string is to arrange in horizontal direction, every the first thermocouple probe string is provided with multiple the first thermocouple probes, be positioned at the spacing that the first thermocouple probe of simulation fire source top arranges tight with respect to the first thermocouple probe arrangement pitches at other positions, the second thermocouple probe string is to be vertical to arrange, the utility model describes as an example of four the second thermocouple probe strings example, be to have four the second thermocouple probes on every the second thermocouple probe string, four the second thermocouple probes are to arrange by the mode of arranging of loosening gradually from top to bottom, preferably, four the second thermocouple probes are followed successively by 4cm, 15cm, 30.5cm and 50cm from the top down to the distance of experiment table main body 1 ceiling 13, and thermocouple probe string 3 is connected with the input end of TT&C system.
Further, experiment table main body 1 below is provided with supporting leg 10, is also provided with high temperature resistant Grille lamp 131 on ceiling 13, and high temperature resistant Grille lamp 131 is distributed on the center line of ceiling 13 length directions.
Further, front end-plate 15, end plate 16, left side wall 17 and right side wall 18 are respectively equipped with cable duct 100 with the center of floor 14 connecting places, be provided with and gather and power consumption cable in cable duct 100, and cable is connected with TT&C system.
Further, hot line wind speed probe string 4 and smoke components measuring probe string 5 are all arranged on ceiling 13 and can move along the length direction of ceiling 13.Smoke components measuring probe string 5 is for measuring flue gas O
2, CO, CO
2and H
2the concentration of gas, hot line wind speed probe string 4 is for measuring flue gas flow rate.Smoke components measuring probe string 5 comprises and is the O that vertical sets gradually
2, CO, CO
2and H
2concentration probe, hot line wind speed probe string 4 comprises that 4 are the hot line wind speed probe 4 that vertical is arranged and spacing is 15cm, hot line wind speed probe string 4 is connected with the input end of TT&C system with smoke components measuring probe string 5.Specifically, hot line wind speed probe string 4, perpendicular to ceiling setting, arranges altogether 4, and spacing is between any two 15cm, and smoke components measuring probe string 5 is also perpendicular to ceiling setting, is also to arrange 4, is from up to down respectively O
2, CO, CO
2and H
2concentration probe, the spacing between concentration probe is also 15cm between two.
Operation steps of the present utility model is as follows:
(1) all parts of testing fixture and wire connection state, guarantees that device can normally work;
(2) open vacuum system, when the data that show meet experiment condition, open ventilating system on pressure vacuum gauge, TT&C system is carried out adjusting air inflow quantity by the valve opening that regulates the first electric control valve, by the fixing wind speed of experimental design;
(3) start TT&C system, gather thermopair and survey temperature information, hot line wind speed that string transmits and survey velocity information that string transmits and gas composition measurement and survey the quality information that gas concentration information that string transmits, pressure information that tensimeter transmits and electronic balance transmit, open the video camera of view window outside and adjust its angle and focal length;
(4) make simulation fire source on fire, close hatch door simultaneously;
(5) after the fuel afterburnt of simulation fire source or burning arrive setting-up time, simulation fire source is broken off, and now closes TT&C system, vacuum system and ventilating system, starts smoke evacuation system, and experiment finishes.
The beneficial effects of the utility model are:
(1) variation that this fire test analogue means can adjusting cabin internal pressure, can simulated aircraft in ground experiment chamber under low-pressure state when breaking out of fire, the smoke movement rule that in cargo hold, combustible burning produces and Hong combustion process, the smoke detection system and the fire extinguishing system that are suitable for aircraft hold for research and development provide experiment porch.
(2) this fire test analogue means can make air-flow in cabin be evenly distributed, even under operating on low voltage state, also can maintain the pressure mobile equilibrium in burning things which may cause a fire disaster combustion process in cabin, the variation of the fire parameter can simulate truly under low-pressure state breaking out of fire in cabin time, improves the accuracy of experiment.
(3) this fire test analogue means can obtain the CO in the temperature field, velocity field, flue gas of auto levelizer inside
2, CO, O
2the information such as the concentration of gas and the quality of burning things which may cause a fire disaster, can study the response lag of detector, Hong combustion anti-raw critical condition and the combustion rate of burning things which may cause a fire disaster etc.
In sum, fire test analogue means of the present utility model is specially for infrabar aircraft hold restricted clearance fire smoke rule, the Full-scale tests platform of research is comprehensively carried out in detection and fire extinguishing etc., the experimental error that this fire test analogue means had both overcome numerical simulation tool not accurately and reduced scale degree and partial model experiment table bring, guarantee again the repeatability of experiment, and cost of manufacture is lower, for carry out this restricted clearance of aircraft hold fire development process when breaking out of fire under low-pressure state in ground experiment chamber, the research of smoke movement rule and Hong combustion process is significant.
Above embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model, all should fall in the definite protection domain of the utility model claims.
Claims (9)
1. an infrabar aircraft hold fire test analogue means, it is characterized in that: comprise the experiment table main body (1) matching with real aircraft cargo hold size, described experiment table main body (1) is an enclosure space, described experiment table main body (1) is provided with hatch door (11), view window (12), the inside of experiment table main body (1) is provided with simulation fire source (2), electronic balance (24), thermocouple probe string (3), hot line wind speed probe string (4) and smoke components measuring probe string (5), in described experiment table main body (1), be connected with ventilating system (6), vacuum system (7) and smoke evacuation system (8), described ventilating system (6), vacuum system (7) and smoke evacuation system (8) are connected with TT&C system, described experiment table main body (1) is welded by ceiling (13), floor (14), front end-plate (15), end plate (16), left side wall (17) and right side wall (18), and described hatch door (11) is arranged on right side wall (18), described ventilating system (6) comprises the air vent (61) being arranged on end plate (16) and is fixed on the ventilation duct (9) on ceiling (13), described ventilation duct (9) is stainless steel ventilation duct, and one end of ventilation duct (9) is connected with air vent (61), the other end of ventilation duct (9) is closing end, described ventilation duct (9) is put along the circumferential hoop winding of ceiling (13), on the tube wall on described ventilation duct (9) sensing floor (14), multiple air outlets (91) are evenly set, described ventilation duct (9) is inner is radially provided with homogenizing plate (92) along it, on described homogenizing plate (92), be evenly distributed with multiple air outlet openings (93), and described homogenizing plate (92) is arranged on the porch of ventilation duct (9), described air vent (61) is connected with the first blower fan (63) by the first ventilating duct (62), on described the first ventilating duct (62), be provided with successively the first stop valve (64), the first electric control valve (65) and orifice flowmeter (66), described orifice flowmeter (66) is connected with the outlet of the first blower fan (63), the upper also bypass of described the first ventilating duct (62) has branch road (67), described branch road (67) is provided with second stop valve (68) in parallel with the first stop valve (64) and the first electric control valve (65), described orifice flowmeter (66) is connected with the input end of TT&C system, described the first electric control valve (65) is connected with the output terminal of TT&C system, described vacuum system (7) comprises the aspirating hole (71) being arranged on left side wall (17), described aspirating hole (71) is connected with vacuum pump (73) by the second ventilating duct (72), on described the second ventilating duct (72), be provided with successively vacuum control check valve (74), the second electric control valve (75) and frequency-variable controller (76), described frequency-variable controller (76) is connected with the outlet of vacuum pump (73), on described front end-plate (15), be also provided with pressure vacuum gauge (77), described pressure vacuum gauge (77) is connected with the input end of TT&C system, described the second electric control valve (75), frequency-variable controller (76) is connected with the output terminal of TT&C system, the frequency of described frequency-variable controller (76) is directly proportional to rotating speed and the rate of air sucked in required of vacuum pump (73).
2. analogue means according to claim 1, it is characterized in that: described smoke evacuation system (8) comprises the exhaust smoke hole (81) being arranged on ceiling (13), described exhaust smoke hole (81) is connected with the second blower fan (83) by smoke discharging pipe (82), and described smoke discharging pipe (82) is provided with manually operated control valve.
3. analogue means according to claim 1, it is characterized in that: described ceiling (13), floor (14), front end-plate (15), end plate (16), left side wall (17) and right side wall (18) are corrosion resistant plate, described view window (12) is separately positioned on the front end-plate (15) of experiment table main body (1), end plate (16), on left side wall (17) and right side wall (18), described view window (12) is made up of the flame resistant glass of resistance to 1000 ℃ of high temperature, described view window (12) outside is provided with video camera, described video camera is connected with the input end of TT&C system.
4. analogue means according to claim 1, it is characterized in that: described simulation fire source (2) is arranged on food tray (21), described food tray is placed on floor (14), between described food tray (21) and floor (14), be provided with successively from top to bottom fire-proof asbestos plate (22), heat insulation steelframe (23) and electronic balance (24), described electronic balance (24) is connected with the input end of TT&C system.
5. analogue means according to claim 1, it is characterized in that: described thermocouple probe string (3) comprises the second thermocouple probe string (32) that is parallel to the first thermocouple probe string (31) of ceiling (13) setting and arranges perpendicular to ceiling (13), the first described thermocouple probe string (31) is evenly arranged at least three along the length direction of ceiling (13), on every described the first thermocouple probe string (31), be provided with multiple the first thermocouple probes, the first thermocouple probe interval of described simulation fire source (2) top is tight, the first thermocouple probe interval of simulation fire source (2) both sides is loose, the second described thermocouple probe string (32) is arranged at least three along the short transverse interval of ceiling (13), the second described thermocouple probe string (32) is distributed in top and the both sides of simulation fire source (2), every described the second thermocouple probe string (32) from up to down arranges multiple the second thermocouple probes (33), spacing between described multiple thermocouple probes (33) from up to down increases progressively setting, and described thermocouple probe string (3) is connected with the input end of TT&C system.
6. analogue means according to claim 1, it is characterized in that: described experiment table main body (1) below is provided with supporting leg (10), on described ceiling (13), be also provided with high temperature resistant Grille lamp (131), described high temperature resistant Grille lamp (131) is distributed on the center line of ceiling (13) length direction.
7. analogue means according to claim 1, it is characterized in that: described front end-plate (15), end plate (16), left side wall (17) and right side wall (18) is respectively equipped with cable duct (100) with the center of floor (14) connecting place, in cable duct (100), be provided with and gather and power consumption cable, described cable is connected with TT&C system.
8. analogue means according to claim 4, is characterized in that: described simulation fire source (2) is methyl alcohol oil sump fire and fragrant post, and methyl alcohol oil sump fire and fragrant post spacing are between the two 40～50cm.
9. analogue means according to claim 1, it is characterized in that: it is upper and can move along the length direction of ceiling (13) that described hot line wind speed probe string (4) and smoke components measuring probe string (5) are all arranged on ceiling (13), described smoke components measuring probe string (5) comprises and is the O that vertical sets gradually
2, CO, CO
2and H
2concentration probe, described hot line wind speed probe string (4) comprises that 4 are the hot line wind speed probe (4) that vertical is arranged and spacing is 15cm, and described hot line wind speed probe string (4) is connected with the input end of TT&C system with smoke components measuring probe string (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320792113.0U CN203644291U (en) | 2013-12-05 | 2013-12-05 | Low-pressure airplane cargo bay fire experiment simulation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320792113.0U CN203644291U (en) | 2013-12-05 | 2013-12-05 | Low-pressure airplane cargo bay fire experiment simulation device |
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| Publication Number | Publication Date |
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| CN203644291U true CN203644291U (en) | 2014-06-11 |
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| CN201320792113.0U Withdrawn - After Issue CN203644291U (en) | 2013-12-05 | 2013-12-05 | Low-pressure airplane cargo bay fire experiment simulation device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606333A (en) * | 2013-12-05 | 2014-02-26 | 中国科学技术大学 | Low-pressure plane cargo space fire experiment simulation device |
| CN104833778A (en) * | 2015-05-14 | 2015-08-12 | 威特龙消防安全集团股份公司 | System and method for aviation fire test |
| CN105067026A (en) * | 2015-08-31 | 2015-11-18 | 华南理工大学 | Device and method for studying influence of external wind speed on flame propagation and stability |
| CN105551361A (en) * | 2015-12-10 | 2016-05-04 | 中国石油大学(华东) | Wide-water-surface oil pool fire combustion simulation device under effect of environmental wind |
| CN106057053A (en) * | 2016-07-19 | 2016-10-26 | 国网安徽省电力公司电力科学研究院 | Cable duct fire test and fire fighting device performance testing platform |
| CN107393403A (en) * | 2017-07-31 | 2017-11-24 | 西南交通大学 | A kind of multipurpose underground space structure fire combustion simulation test device systematic |
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2013
- 2013-12-05 CN CN201320792113.0U patent/CN203644291U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606333A (en) * | 2013-12-05 | 2014-02-26 | 中国科学技术大学 | Low-pressure plane cargo space fire experiment simulation device |
| CN103606333B (en) * | 2013-12-05 | 2015-06-24 | 中国科学技术大学 | Low-pressure plane cargo space fire experiment simulation device |
| CN104833778A (en) * | 2015-05-14 | 2015-08-12 | 威特龙消防安全集团股份公司 | System and method for aviation fire test |
| CN105067026A (en) * | 2015-08-31 | 2015-11-18 | 华南理工大学 | Device and method for studying influence of external wind speed on flame propagation and stability |
| CN105551361A (en) * | 2015-12-10 | 2016-05-04 | 中国石油大学(华东) | Wide-water-surface oil pool fire combustion simulation device under effect of environmental wind |
| CN105551361B (en) * | 2015-12-10 | 2018-02-06 | 中国石油大学(华东) | Broad water surface liquid pool fire combustion simulation device under a kind of ambient wind effect |
| CN106057053A (en) * | 2016-07-19 | 2016-10-26 | 国网安徽省电力公司电力科学研究院 | Cable duct fire test and fire fighting device performance testing platform |
| CN107393403A (en) * | 2017-07-31 | 2017-11-24 | 西南交通大学 | A kind of multipurpose underground space structure fire combustion simulation test device systematic |
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