CN103411749B - A kind of for studying the experimental provision and experimental technique thereof inducing smoke evacuation system - Google Patents
A kind of for studying the experimental provision and experimental technique thereof inducing smoke evacuation system Download PDFInfo
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- CN103411749B CN103411749B CN201310366351.XA CN201310366351A CN103411749B CN 103411749 B CN103411749 B CN 103411749B CN 201310366351 A CN201310366351 A CN 201310366351A CN 103411749 B CN103411749 B CN 103411749B
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Abstract
The present invention relates to a kind of experimental provision for studying induction smoke evacuation system, including conduction pipe, its two-port installs plate or smoke extractor, burning things which may cause a fire disaster or polluter is placed in conduction pipe, jet blower is arranged on the inwall of conduction pipe, for measuring the thermocouple of temperature, for the hot-wire anemometer of measuring speed and the measurement point position measured in probe insertion conduction pipe of the heat-flow meter for measuring hot-fluid, described jet blower uses aerofoil fan.The invention also discloses the experimental technique of a kind of experimental provision for studying induction smoke evacuation system.The present invention selects the jet blower being certainly made up of aerofoil fan and stainless steel tube, and cost of manufacture is low, the shape of conduction pipe, length, and air-out and the shape of air inlet and position can need to arrange according to experiment, it is simple to the research of experiment parameter.The present invention is possible not only to do the research in inductive ventilation system flow field, it is also possible to the induced draught impact on fire spread when research induction smoke evacuation system or fire.
Description
Technical field
The present invention relates to safe and scientific and engineering experiment apparatus field, a kind of for studying the experimental provision and experimental technique thereof inducing smoke evacuation system.
Background technology
On the one hand the action principle of induction smoke evacuation system is the high-speed jet disturbance ambient gas utilizing jet blower to produce, and obtains velocity field in certain space to stop the flowing of flue gas vertical and horizontal；On the other hand jet is utilized flue gas induction to be discharged by flue gas to side, space by machinery or natural draught system mouth." civil construction and environmental project " (2009,31(6), page 67) describe the 1/20 minification experimental provision that the induction of research level tunnel is discharged fume, owing to tunnel model is the most special, its cross-sectional width is far smaller than length of tunnel, therefore flow field can be approximately one-dimensional, and this article simply research controls the critical wind velocity of flue gas longitudinally adverse current, the flow field of jet blower is to form uniform wind speed face by tunnel portal consentrated air supply, does not arrange jet blower." Beijing Inst. of Civil Engineering & Arch's journal " (2009,25(2), 14-15 page) describe the laboratory table of critical ventilation speed in research building channel, the longest and the narrowest passage, not research critical wind velocity barrier effect to flow of flue gas in the direction of the width." HVAC " (2007,37(12), page 10) describe velocity field characteristics of inductive ventilation systems in underground garages research experiment platform, laboratory table be the one piece of region chosen in large space be object of study, jet blower is arranged in inside large space, select is intelligent YFA-3Z (W) induced draught device, but the jet blower of engineering and induced draught device size are greatly and the air outlet velocity of blower fan, nozzle configuration and air flow direction are all fixing, it is difficult to adapt to the change of parameter in experimentation and make corresponding adjustment.
Summary of the invention
The primary and foremost purpose of the present invention is to provide a kind of being possible not only to study the jet blower longitudinal suppression effect to flue gas, it is also possible to research jet blower to the stop situation of horizontal fire and smoke spread, be easy to make the experimental provision for studying induction smoke evacuation system of corresponding adjustment according to the change of parameter in experimentation.
For achieving the above object, present invention employs techniques below scheme: a kind of for studying the experimental provision inducing smoke evacuation system, including conduction pipe, its two-port installs plate or smoke extractor, burning things which may cause a fire disaster or polluter is placed in conduction pipe, jet blower is arranged on the inwall of conduction pipe, for measuring the thermocouple of temperature, for the hot-wire anemometer of measuring speed and the measurement point position measured in probe insertion conduction pipe of the heat-flow meter for measuring hot-fluid, described jet blower uses aerofoil fan；Arranging slot on the inwall of the two-port of described conduction pipe, left and right plate inserts in this slot, and conduction pipe and left and right plate surround closed cavity jointly；Described smoke extractor is made up of the pressure fan and smoke exhaust fan being separately mounted to the left and right two-port of conduction pipe；Described conduction pipe is made up of top board, base plate and sidewall, horizontal slide rail and longitudinal slide rail are set on top board, jet blower is suspended on horizontal slide rail and longitudinal slide rail by hook, bracing frame is installed on described base plate, bracing frame top is provided for placing burning things which may cause a fire disaster or the food tray of polluter, the bottom of bracing frame is stretched out by conduction pipe, and electronic scale is arranged on the bottom of bracing frame, and base plate is offered manhole；Described jet blower is small-sized direct current or exchange aerofoil fan, and aerofoil fan is placed in stainless steel elbow or stainless pipe, and the two ends of stainless steel elbow or stainless pipe body arrange drainage screen, and the air outlet of jet blower is towards burning things which may cause a fire disaster or polluter；The probe of measuring of described thermocouple, hot-wire anemometer and heat-flow meter is connected with the signal input port of data collecting system；The power line of described jet blower is drawn and external frequency modulation device by the sidewall of conduction pipe；Described plate uses PLASTIC LAMINATED；Described top board uses PLASTIC LAMINATED or flame resistant glass, and described base plate uses PLASTIC LAMINATED, and described sidewall uses flame resistant glass, and PLASTIC LAMINATED and flame resistant glass indicate scale；Arranging observation window on described top board, observation window uses and indicates graduated flame resistant glass.
Another object of the present invention is to provide the experimental technique of a kind of experimental provision for studying induction smoke evacuation system, the method includes the step of following order:
(1) open manhole, adjust layout and the spacing of jet blower, in food tray, pour burning things which may cause a fire disaster or polluter into, close manhole and demarcate thermocouple, hot-wire anemometer and heat-flow meter, open jet blower power supply regulation voltage, demarcate jet blower air outlet velocity；
(2) plate is inserted slot or smoke extractor is powered on；
(3) opening external camera and adjust angle and focal length, being ignited the burning things which may cause a fire disaster in food tray or polluter by manhole, the scheduled time opens jet blower；
(4) by flame resistant glass high scale record fire and smoke spread distance after conduction pipe flow field is stable, by temperature, speed and hot-fluid parameter in the data output record conduction pipe of thermocouple, hot-wire anemometer and heat-flow meter；Described being powered on by smoke extractor refers to: open pressure fan, demarcates air-supply wind speed, opens smoke exhaust fan, demarcates air draft wind speed.
As shown from the above technical solution, the present invention selects the jet blower being certainly made up of aerofoil fan and stainless steel tube, and cost of manufacture is low, the shape of conduction pipe, length, air-out and the shape of air inlet and position can need to arrange according to experiment, it is simple to the research of experiment parameter；Inside conduction pipe, arrange that two ends use movable wall, can regulate vent size or connect smoke extractor for placing burning things which may cause a fire disaster or the food tray of polluter and thermocouple, hot-wire anemometer and heat-flow meter measurement probe for measuring speed, temperature and hot-fluid.The present invention is possible not only to do the research in inductive ventilation system flow field, it is also possible to the induced draught impact on fire spread when research induction smoke evacuation system or fire.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the structural representation of jet blower in Fig. 1；
Fig. 3 is top board in Fig. 1, horizontal slide rail, longitudinal slide rail, plate, the structural representation of jet blower；
Fig. 4 is the structural representation looking up direction of the embodiment of the present invention two；
Fig. 5 is the structural representation of jet blower in Fig. 4.
Detailed description of the invention
A kind of experimental provision for studying induction smoke evacuation system, including conduction pipe, its two-port installs plate 7 or smoke extractor, burning things which may cause a fire disaster or polluter is placed in conduction pipe, jet blower 6 is arranged on the inwall of conduction pipe, for measuring the thermocouple 11 of temperature, for the hot-wire anemometer 10 of measuring speed and the measurement point position measured in probe insertion conduction pipe of the heat-flow meter 12 for measuring hot-fluid, described jet blower 6 uses aerofoil fan, such as Fig. 1, shown in 4, described plate 7 uses PLASTIC LAMINATED.
As it is shown in figure 1, arrange slot 14 on the inwall of the two-port of described conduction pipe, left and right plate 7 inserts in this slot 14, and conduction pipe and left and right plate 7 surround closed cavity jointly；As shown in Figure 4, described smoke extractor is made up of the pressure fan 16 and smoke exhaust fan 17 being separately mounted to the left and right two-port of conduction pipe.Described jet blower 6 is small-sized direct current or exchange aerofoil fan, aerofoil fan is placed in rustless steel square tube 18 or stainless pipe 19, the two ends of rustless steel square tube 18 or stainless pipe 19 body arrange drainage screen 15, drainage screen 15 is capable of flow equalizing function, the air outlet of jet blower 6 is towards burning things which may cause a fire disaster or polluter, Fig. 2 show rustless steel square tube 18, and Fig. 5 show stainless pipe 19.
As shown in Figure 1,2,3, 4, described conduction pipe is made up of top board 3, base plate 1 and sidewall 2, horizontal slide rail 4 and longitudinal slide rail 5 are set on top board 3, jet blower 6 is suspended on horizontal slide rail 4 and longitudinal slide rail 5 by hook, installing bracing frame 9 on described base plate 1, bracing frame 9 top is provided for placing burning things which may cause a fire disaster or the food tray 8 of polluter, and the bottom of bracing frame 9 is stretched out by conduction pipe, electronic scale 13 is arranged on the bottom of bracing frame 9, and base plate 1 offers manhole.The probe of measuring of described thermocouple 11, hot-wire anemometer 10 and heat-flow meter 12 is connected with the signal input port of data collecting system；The power line of described jet blower 6 is drawn and external frequency modulation device by the sidewall 2 of conduction pipe.Described top board 3 uses PLASTIC LAMINATED or flame resistant glass, described base plate 1 to use PLASTIC LAMINATED, described sidewall 2 to use sign scale on flame resistant glass, PLASTIC LAMINATED and flame resistant glass.Arranging observation window on described top board 3, observation window uses and indicates graduated flame resistant glass.
When testing, its experimental procedure is as follows:
(1) open manhole, adjust layout and the spacing of jet blower, in food tray, pour burning things which may cause a fire disaster or polluter into, close manhole and demarcate thermocouple, hot-wire anemometer and heat-flow meter, open jet blower power supply regulation voltage, demarcate jet blower air outlet velocity；
(2) plate is inserted slot or smoke extractor is powered on；Described being powered on by smoke extractor refers to: open pressure fan, demarcates air-supply wind speed, opens smoke exhaust fan, demarcates air draft wind speed；
(3) opening external camera and adjust angle and focal length, being ignited the burning things which may cause a fire disaster in food tray or polluter by manhole, the scheduled time opens jet blower；
(4) by flame resistant glass high scale record fire and smoke spread distance after conduction pipe flow field is stable, by temperature, speed and hot-fluid parameter in the data output record conduction pipe of thermocouple, hot-wire anemometer and heat-flow meter.
Embodiment one
As shown in Figure 1, 2, 3, the present embodiment reduces the experimental provision of the rectangle underground garage induction smoke evacuation system that ratio is 1:10 for research, and conduction pipe is the cuboid closed cavity that there is vent at the two ends that wall is made up of exotic material.Base plate 1 uses PLASTIC LAMINATED, sidewall 2 and top board 3 to make with flame resistant glass, and PLASTIC LAMINATED and flame resistant glass are respectively marked with scale；Jet blower 6 is for self-control Small Jet blower fan as shown in Figure 2, select the direct current axial cooling fan 20 of length of side 6cm, it is placed in the curved rustless steel square tube 18 of L that total length is 20cm, rustless steel square tube 18 two ends arrange drainage screen 15, the air outlet of jet blower 6 faces burning things which may cause a fire disaster direction, the inlet scoop faced downwards of jet blower 6；Jet blower 6 is suspended on three horizontal slide rails 4 of top board 3, as it is shown on figure 3, three horizontal slide rails 4 can regulate the horizontal spacing of jet blower 6, the longitudinal pitch of jet blower 6 can also be by slidable adjustment on longitudinal slide rail 5.
In the present embodiment, fuel uses kerosene, ignites from manhole.During experiment, it is first turned on manhole V1, V2, adjusts jet blower 6 arrangement form and spacing, place burning things which may cause a fire disaster, then choose in the plate 7 of appropriate openings inserts two end slots 14 fixing；Closing manhole V1, V2, demarcate the measuring instruments such as hot-wire anemometer 10, thermocouple 11, heat-flow meter 12, the power supply opening jet blower 6 regulates its voltage, demarcates the air outlet velocity of jet blower 6；Afterwards close jet blower 6 power supply, it is ensured that except holes all at vent are turned off, open video camera flow-guiding channel outside and adjust its angle and focal length, by manhole V2 ignite food tray 8 fuel start test；The scheduled time arrives, and opens jet blower 6；After flow-guiding channel flow field is stable, by the recordable fire and smoke spread distance of scale on flame resistant glass, by parameters such as temperature, speed and hot-fluids in the data recordable laboratory table of output of measurement apparatus.
Owing to arrangement and the spacing of jet blower 6 can change, the changeable wind speed frequency of jet blower 6 controls, two ends vent adjustable dimension, if picked, tool smoke extractor exhaust smoke level can also adjust, fire source power also can regulate by choosing different size of food tray, and therefore the present embodiment can record the impact on induction smoke discharging effect of the different sensitive parameter.
Embodiment two
As shown in Figure 4, the present embodiment is to reduce track, the L-type indoor induction smoke evacuation experimental provision that ratio is 1:8, and flow-guiding channel is the L-type closed cavity that wall is made up of exotic material.Base plate 1 and top board 3 use PLASTIC LAMINATED, surrounding sidewall 2 to use flame resistant glass to make, and PLASTIC LAMINATED and flame resistant glass are respectively marked with scale, and top board 3 leaves transparent windows, and observation window flame resistant glass is made.Jet blower 6 is as it is shown in figure 5, select the direct current axial cooling fan 20 of diameter 8cm, and its length is the rustless steel cylinder 19 of 25cm, and rustless steel cylinder 19 one end is tapering type air outlet, and two ends arrange drainage screen 15.
During experiment, it is first turned on manhole V1, V2, V3, hang jet blower 6, and put into food tray 8, it is then shut off manhole V1, V2, V3, demarcating the measuring instruments such as hot-wire anemometer 10, thermocouple 11, heat-flow meter 12, the power supply opening jet blower 6 regulates its voltage, closes power supply after demarcating the air outlet velocity of jet blower 6；Open pressure fan 16, demarcate air-supply wind speed, open smoke exhaust fan 17 and demarcate air draft wind speed；Guarantee, except holes all at vent are turned off, open conduction pipe external camera and adjust its angle and focal length, by manhole V2 ignite food tray 8 fuel start experiment；The scheduled time is to opening jet blower 6；By scale recordable fire and smoke spread distance on flame resistant glass after laboratory table flow field is stable, by parameters such as temperature, speed and hot-fluids in the data recordable laboratory table of output of measurement apparatus.
Opening the quantity of jet blower 6, the arrangement form of jet blower 6, the size of jet wind speed in the present embodiment, the size of air-supply wind speed and air draft wind speed all can regulate, and fire source power can also be changed by choosing different size of food tray 8.
In sum, the present invention selects the jet blower 6 being certainly made up of aerofoil fan and stainless steel tube, and cost of manufacture is low, the shape of conduction pipe, length, and air-out and the shape of air inlet and position can need to arrange according to experiment, it is simple to the research of experiment parameter；Inside conduction pipe, arrange that probe measured by the food tray 8 for placing burning things which may cause a fire disaster or polluter and thermocouple 11, hot-wire anemometer 10 and heat-flow meter 12 for measuring speed, temperature and hot-fluid, two ends use movable wall, can regulate vent size or connect smoke extractor.The present invention is possible not only to do the research in inductive ventilation system flow field, it is also possible to the induced draught impact on fire spread when research induction smoke evacuation system or fire.
Claims (2)
1. the experimental provision being used for studying induction smoke evacuation system, it is characterized in that: include conduction pipe, its two-port installs plate or smoke extractor, burning things which may cause a fire disaster or polluter is placed in conduction pipe, jet blower is arranged on the inwall of conduction pipe, for measuring the thermocouple of temperature, for the hot-wire anemometer of measuring speed and the measurement point position measured in probe insertion conduction pipe of the heat-flow meter for measuring hot-fluid, described jet blower uses aerofoil fan；Arranging slot on the inwall of the two-port of described conduction pipe, left and right plate inserts in this slot, and conduction pipe and left and right plate surround closed cavity jointly；Described smoke extractor is made up of the pressure fan and smoke exhaust fan being separately mounted to the left and right two-port of conduction pipe；Described conduction pipe is made up of top board, base plate and sidewall, horizontal slide rail and longitudinal slide rail are set on top board, jet blower is suspended on horizontal slide rail and longitudinal slide rail by hook, bracing frame is installed on described base plate, bracing frame top is provided for placing burning things which may cause a fire disaster or the food tray of polluter, the bottom of bracing frame is stretched out by conduction pipe, and electronic scale is arranged on the bottom of bracing frame, and base plate is offered manhole；Described jet blower is small-sized direct current or exchange aerofoil fan, and aerofoil fan is placed in stainless steel elbow or stainless pipe, and the two ends of stainless steel elbow or stainless pipe body arrange drainage screen, and the air outlet of jet blower is towards burning things which may cause a fire disaster or polluter；The probe of measuring of described thermocouple, hot-wire anemometer and heat-flow meter is connected with the signal input port of data collecting system；The power line of described jet blower is drawn and external frequency modulation device by the sidewall of conduction pipe；Described plate uses PLASTIC LAMINATED；Described top board uses PLASTIC LAMINATED or flame resistant glass, and described base plate uses PLASTIC LAMINATED, and described sidewall uses flame resistant glass, and PLASTIC LAMINATED and flame resistant glass indicate scale；Arranging observation window on described top board, observation window uses and indicates graduated flame resistant glass.
The experimental technique of experimental provision the most according to claim 1, the method includes the step of following order:
(1) open manhole, adjust layout and the spacing of jet blower, in food tray, pour burning things which may cause a fire disaster or polluter into, close manhole and demarcate thermocouple, hot-wire anemometer and heat-flow meter, open jet blower power supply regulation voltage, demarcate jet blower air outlet velocity；
(2) plate is inserted slot or smoke extractor is powered on；
(3) opening external camera and adjust angle and focal length, being ignited the burning things which may cause a fire disaster in food tray or polluter by manhole, the scheduled time opens jet blower；
(4) by flame resistant glass high scale record fire and smoke spread distance after conduction pipe flow field is stable, by temperature, speed and hot-fluid parameter in the data output record conduction pipe of thermocouple, hot-wire anemometer and heat-flow meter；Open pressure fan, demarcate air-supply wind speed, open smoke exhaust fan, demarcate air draft wind speed.
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| CN110907210A (en) * | 2019-12-03 | 2020-03-24 | 中联科锐消防科技有限公司 | Double-deck shield constructs highway tunnel conflagration ventilation test platform of discharging fume |
| CN114136647B (en) * | 2021-10-20 | 2023-10-03 | 中国航发四川燃气涡轮研究院 | Supersonic high-temperature three-dimensional flow field measuring device |
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