CN106971666B - A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform - Google Patents

A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform Download PDF

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CN106971666B
CN106971666B CN201710336692.0A CN201710336692A CN106971666B CN 106971666 B CN106971666 B CN 106971666B CN 201710336692 A CN201710336692 A CN 201710336692A CN 106971666 B CN106971666 B CN 106971666B
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tunnel
smoke
ventilation
fire
ventilation smoke
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CN201710336692.0A
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CN106971666A (en
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张和平
陈震
张少刚
程旭东
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中国科学技术大学
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
    • G09B25/04Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings

Abstract

The present invention provides a kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, including tunnel model main body, longitudinal ventilation smoke evacuation system, transversal ventilation smoke evacuation system, fire source combustion simulation system and measurement-recording system;The longitudinal ventilation smoke evacuation system is mainly made of frequency conversion axial flow fan and rectification pipeline section;The transversal ventilation smoke evacuation system is mainly made of smoke discharging pipe, frequency conversion axis stream smoke exhaust fan, electronic exhaust smoke valve, air supply duct, frequency conversion axis air supply stream blower and electric feeding air-valve;The fire source combustion simulation system includes liquid fire source combustion simulation system and gas fire source combustion simulation system;The measurement-recording system includes measuring wind speed record system, smoke temperature measurement record system, smoke components concentration analysis system and video recording device.The analog study of a variety of tunnel Fire purging modes may be implemented in the present invention, record flue-gas temperature, ingredient and concentration is convenient for measuring, convenient for the smoke discharging effect of more various ventilation smoke exhaust modes.

Description

A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform

Technical field

The present invention relates to subway tunnel ventilation smoke exhaust technical field, specifically a kind of multi-functional underground railway tunnel fire is logical Wind purging mode analog study platform.

Background technique

With the propulsion of Re-search on Urbanization process, urban population density is more and more, and surface road congestion can't bear, each big city City is in the subway transportation system for building oneself, road improvement traffic environment.However underground fire hazard is one unavoidable asks Topic, especially when subway train generation fire, which runs out of steam, to be rested in running tunnel, since tunnel is long and narrow limited sky Between, easily cause the intoxication accident of poison gas.Therefore, in the case of fire, if it is possible to scene of fire be carried out effective Ventilation smoke exhaust, realizes effective control to fire smoke, provides safety smokeless environment for evacuating personnel, for reducing subway fire The casualties of calamity is of great significance.This just needs to study the flue gas transport property in tunnel fire hazard accordingly.

The research of full-scale tunnel experiment, small size are mainly passed through to the research of tunnel fire disaster fume transport property at this stage What model investigation and these three methods of numerical simulation study carried out.Wherein, the preparatory period of full-scale experiment research it is long, Repeatability is poor, capital consumption amount is big, and numerical simulation study generally requires experimental data and compares verifying, therefore, can Small-scale model experimental study reproducible, that experimental period is short, with a high credibility just becomes the essential of tunnel fire hazard researcher. According to investigation it is found that domestic some scientific research institutions have been set up some tunnel model experimental benches, such as Chinese science skill Art university SKLFS possesses the rectangular section tunnel of a length 72m, height 1.30m, width 1.50m Model experiment platform is mainly used to study the smoke discharging effect of the longitudinal ventilation purging mode of Extra-long Highway Tunnel;Central South University establishes The length of tunnel model experimental bench of horseshoe shaped section although reach 52.5m, but the sectional area of the experimental bench only has 0.65m2, arc top maximum height is 0.70m, and model width of roadway is 1.10m, and it is vertical to be mainly used to research Extra-long Highway Tunnel main body To the validity of ventilation smoke exhaust mode and emphasis ventilation smoke exhaust mode;The Mechanical Academy of Southwest Jiaotong University establishes a ratio For 1:15, length 15m, be highly the rectangle vcehicular tunnel agent model that 0.32m, width are 0.70m, using gas fire source, It is mainly used to study the validity of vcehicular tunnel vertical shaft purging mode;Wuhan University establishes the small size arc top tunnel of a 1:20 Road rig for model test, the tunnel model width of roadway are 0.465m, and arc heights of roofs is 0.322m, and total length only has 13m.In addition, JaeSeongRoh of South Korea et al. also establishes the arc top tunnel model experimental bench of a 1:20, the height and width of the testing stand Degree is 0.40m, and length only has 10m, and the one end in tunnel is equipped with frequency conversion axial flow fan, and it is longitudinal can only to be used to analog study tunnel The effect of ventilation smoke exhaust mode.

By above-mentioned investigation it is found that small-scale model experiment research platform at this stage needs improvedly there is also some Side:

(1) ventilation smoke exhaust mode is single

Existing tunnel fire hazard analog platform can only largely realize analog study or the list of a kind of ventilation smoke exhaust mode Pure natural ventilation smoke or the smoke evacuation of simple longitudinal ventilation, it is few can be by a variety of ventilation smoke exhaust Mode integratings to one The research platform of body.

(2) tunnel model size is less than normal

Due to being limited by experimental site, length is substantially all in 10m most of tunnel model outside Current Domestic In the range of left and right.In fact, the size of tunnel model has important influence for analog result.Undersized tunnel mould Type is difficult to meet some important similarity criterions, and the too small turbulence structure that will affect flue gas of cross-sectional area changes smoke movement Field Characteristics;Length it is too small then can not analog study apart from fire source compared with the smoke movement situation at distant positions.

(3) fire source combustion simulation mode is single

Existing tunnel fire hazard analog platform mostly uses the burning of food tray simulation fire source.But the heat release function of food tray fire source Rate is mainly determined by the area of fuel type and food tray, cannot achieve continuously adjusting for fire source power, is needed in experiment repeatedly more Change fire source food tray.

(4) ventilation wind speed control accuracy is low

Most of tunnel fire hazard analog platform is usually not provided with the whole of rectification pipeline section or setting since length is shorter Flow tube segment length is insufficient, so that the longitudinal ventilation rate applied is unstable, is unevenly distributed, to influence ventilation smoke exhaust effect Analog study result.

Summary of the invention

The purpose of the present invention is to provide a kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research is flat Platform makes up the deficiency of the platform of tunnel fire hazard analog study at this stage, realizes the analog study of different types of ventilation smoke exhaust mode, Easy to operate, securely and reliably, favorable repeatability, effect is obvious.

The technical solution of the present invention is as follows:

A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, including tunnel model main body, Longitudinal ventilation smoke evacuation system, transversal ventilation smoke evacuation system, semi-transverse ventilation smoke evacuation system, fire source combustion simulation system and measurement Record system;

The longitudinal ventilation smoke evacuation system is mainly made of frequency conversion axial flow fan and rectification pipeline section;The frequency conversion axial flow fan Air outlet be connected to one end of rectification pipeline section, the other end of the rectification pipeline section passes through detachable interface and tunnel model main body Connection;

The transversal ventilation smoke evacuation system is mainly by smoke discharging pipe, frequency conversion axis stream smoke exhaust fan, electronic exhaust smoke valve, air-supply Pipeline, frequency conversion axis air supply stream blower and electric feeding air-valve are constituted;The smoke discharging pipe is by being arranged in tunnel model main body internal upper part Ceiling and tunnel model body top between gap constitute;The frequency conversion axis stream smoke exhaust fan has two, is separately mounted to The both ends exit of smoke discharging pipe;The electronic exhaust smoke valve has several, is separately mounted to equidistantly open up on ceiling each At smoke outlet;The air supply duct is by being arranged in tunnel model main body between the bottom plate of lower part and tunnel model bottom part body Gap is constituted;The frequency conversion axis air supply stream blower has two, is separately mounted to the both ends entrance of air supply duct;The electric feeding Air-valve has several, is separately mounted at each air outlet equidistantly opened up on bottom plate;

The semi-transverse ventilation smoke evacuation system is mainly by smoke discharging pipe, frequency conversion axis stream smoke exhaust fan and electronic exhaust smoke valve structure At;The smoke discharging pipe, frequency conversion axis stream smoke exhaust fan and electronic exhaust smoke valve are transversal ventilation smoke evacuation system and semi-transverse ventilation Smoke evacuation system shares, i.e., the described semi-transverse ventilation smoke evacuation system is a part of transversal ventilation smoke evacuation system;

The fire source combustion simulation system includes liquid fire source combustion simulation system and gas fire source combustion simulation system;

The measurement-recording system includes that measuring wind speed record system, smoke temperature measurement record system, smoke components are dense Spend analysis system and video recording device.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the tunnel model main body It is connected and composed by the dismountable circular cross-sectional cavity unit of several sections, the leading flank of each section chamber unit is mounted on a song Face toughened glass window, the curved strengthened glass window outwardly open from top to bottom.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the frequency conversion axial flow fan Cross-sectional area be greater than tunnel model main body cross-sectional area, the frequency conversion axial flow fan by reducing pipe and rectification pipeline section connect Logical, the length of the rectification pipeline section is greater than 3m.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the liquid fire source burning Simulation system mainly by for placing food tray food tray bracket, for real-time measurement record liquid fuel quality electronic balance and Computer is constituted, and one end of the food tray bracket is placed on an electronic balance, and the other end protrudes into tunnel model body interior, the electricity The output end of sub- balance and the input terminal of computer connect.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the gas fire source burning Simulation system is mainly by being arranged in the multi-orifice burner of tunnel model body interior and tunnel model body exterior being arranged in Gas flowmeter, pressure reducing valve and fuel storage cylinder are constituted, and the gas flowmeter is connect with multi-orifice burner, the fuel gas storage Bottle is connect by pressure reducing valve with gas flowmeter.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the measuring wind speed record System is mainly by being arranged in tunnel model body interior and close to the removable wind speed probe tree and setting for rectifying pipeline section in tunnel Wind speed Acquisition Instrument and computer outside road die body are constituted, and the output end of the removable wind speed probe tree is acquired by wind speed The connection of the input terminal of instrument and computer.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the smoke temperature measurement Record system mainly by the removable thermocouple tree of tunnel model body interior is arranged in, on the downside of ceiling genesis analysis thermoelectricity Amphitene battle array and the temperature sensor and computer composition, the removable thermocouple tree and heat that tunnel model body exterior is set The output end of galvanic couple linear array is connected by the input terminal of temperature sensor and computer.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the smoke components concentration Analysis system is mainly by being arranged in the removable smoke collecting bar of tunnel model body interior and being arranged in tunnel model main body External flue gas analyzer and computer is constituted, and the output end of the removable smoke collecting bar passes through flue gas analyzer and computer Input terminal connection.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the video recording device Mainly be made of the laser light sheet and video recorder that tunnel model body exterior is arranged in, the laser light sheet be used for Tunnel model body interior emits sheet laser clearly to show the Field Characteristics of smoke movement during ventilation smoke exhaust, the view Field Characteristics of the frequency recorder for smoke movement during the state of record fire simulation experiment in real time and ventilation smoke exhaust.

The multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, the tunnel model main body Length be 30m or more.

The invention has the benefit that

As shown from the above technical solution, the degree of modularity of the present invention is high, easy to operate, multiple functional, compensates for previous tunnel Natural ventilation smoke may be implemented in fire disaster simulation research platform ventilation smoke exhaust mode single deficiency in road, longitudinal ventilation is discharged fume, complete Fire ventilation smoke exhaust mode in a variety of subway sectional tunnels such as transversal ventilation smoke evacuation, semi-transverse ventilation smoke evacuation, emphasis ventilation smoke exhaust Analog study;At the same time, the cross-sectional area of tunnel model main body of the invention is sufficiently large, length long enough, completely can be with The correct simulation of ventilation smoke exhaust when realizing fire, and the leading flank of tunnel model main body is all using tempering glass resistant to high temperature Glass, visual good, the very convenient motion feature and flow field structure for observing and recording fire smoke are convenient for measuring record flue gas temperature Degree, ingredient and concentration, convenient for the smoke discharging effect of more various ventilation smoke exhaust modes.

Detailed description of the invention

Fig. 1 is structural schematic diagram of the invention;

Fig. 2 is tunnel model main body schematic diagram of the invention;

Fig. 3 is fire source combustion simulation system schematic of the invention, wherein Fig. 3 (a) is liquid fire source combustion simulation system Schematic diagram, Fig. 3 (b) are gas fire source combustion simulation system schematic;

Fig. 4 is measuring wind speed record system schematic of the invention;

Fig. 5 is smoke temperature measurement record system schematic of the invention;

Fig. 6 is smoke components concentration analysis system schematic of the invention.

Specific embodiment

The present invention is further illustrated in the following with reference to the drawings and specific embodiments.

As shown in Fig. 1~Fig. 6, a kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, packet Include tunnel model main body 1, longitudinal ventilation smoke evacuation system, transversal ventilation smoke evacuation system, semi-transverse ventilation smoke evacuation system, fire source combustion Burn simulation system and measurement-recording system.

Tunnel model main body 1 is fixed on testing stand bracket 0, is connected by the dismountable circular cross-sectional cavity unit of several sections It constitutes, the leading flank of each section chamber unit is mounted on a curved strengthened glass window 1-1 resistant to high temperature, facilitates observation flue gas The Field Characteristics of movement are easy to record the effect of ventilation smoke exhaust, and curved strengthened glass window 1-1 can from top to bottom outward It opens, facilitate arrangement or replaces some detection instruments and equipment inside tunnel model main body 1.Each section chamber unit it is upper, Downside and trailing flank are all made of fire-proof board and are made, and the place of having the gap carries out corresponding encapsulation process, prevent tunnel model master Body 1 leaks out cigarette.The length of each section chamber unit is 5m, and 10 section chamber units can form the tunnel model main body of 50m, press According to the ratio of 1:5, the subway sectional tunnel of 250m length can be simulated.

Longitudinal ventilation smoke evacuation system is mainly made of frequency conversion axial flow fan 2-1, reducing pipe 2-2 and rectification pipeline section 2-3, frequency conversion The cross-sectional area of axial flow blower 2-1 is greater than the cross-sectional area of tunnel model main body 1, and the air outlet of frequency conversion axial flow fan 2-1 passes through Reducing pipe 2-2 is connected to one end of rectification pipeline section 2-3, and the other end of rectification pipeline section 2-3 passes through detachable interface and tunnel model Main body 1 is connected to.The length of rectification pipeline section 2-3 will at least have 3m, frequency conversion axial flow fan 2-1 to change by changing the revolving speed of impeller The size of air outlet wind speed mentions after the rectification processing of reducing pipe 2-2 and rectification pipeline section 2-3 into tunnel model main body 1 For uniform and stable longitudinal ventilation.

Transversal ventilation smoke evacuation system is mainly by smoke discharging pipe 3-1, frequency conversion axis stream smoke exhaust fan 3-2, electronic exhaust smoke valve 3- 3, air supply duct 3-4, frequency conversion axis air supply stream blower 3-5 and electric feeding air-valve 3-6 are constituted.Smoke discharging pipe 3-1 is by being arranged in tunnel Gap between 1 top of ceiling and tunnel model main body of 1 internal upper part of die body is constituted.Frequency conversion axis stream smoke exhaust fan 3-2 has Two, it is separately mounted to the both ends exit of smoke discharging pipe 3-1.Electronic exhaust smoke valve 3-3 has several, is separately mounted on ceiling At each smoke outlet equidistantly opened up.Air supply duct 3-4 is by being arranged in the bottom plate of lower part and tunnel mould in tunnel model main body 1 Gap between 1 bottom of type main body is constituted.Frequency conversion axis air supply stream blower 3-5 has two, is separately mounted to the two of air supply duct 3-4 Hold entrance.Electric feeding air-valve 3-6 has several, is separately mounted at each air outlet equidistantly opened up on bottom plate.It is electronic Exhaust smoke valve 3-3 and electric feeding air-valve 3-6 can be achieved Electronic control and be automatically opened or closed.

Semi-transverse ventilation smoke evacuation system is mainly by smoke discharging pipe 3-1, frequency conversion axis stream smoke exhaust fan 3-2 and electronic exhaust smoke valve 3- 3 are constituted.Smoke discharging pipe 3-1, frequency conversion axis stream smoke exhaust fan 3-2 and electronic exhaust smoke valve 3-3 are transversal ventilation smoke evacuation system and half Transversal ventilation smoke evacuation system shares, i.e. semi-transverse ventilation smoke evacuation system a part for being transversal ventilation smoke evacuation system.

Fire source combustion simulation system is divided into two classes: liquid fire source combustion simulation system and gas fire source combustion simulation system. Wherein, liquid fire source combustion simulation system mainly by for placing food tray food tray bracket 4-1, for real-time measurement record liquid The electronic balance 4-2 and computer 10 of fuel mass are constituted, and one end of food tray bracket 4-1 is placed on electronic balance 4-2, the other end It protrudes into inside tunnel model main body 1, the output end of electronic balance 4-2 is connect with the input terminal of computer 10, by replacing different rulers The simulated combustion under the conditions of different fire source powers may be implemented in very little food tray and liquid fuel, and can real-time measurement record fire Mass loss when source is burnt;Gas fire source combustion simulation system is mainly by being arranged in the porous combustion inside tunnel model main body 1 Burner 5-1 and the gas flowmeter 5-2 being arranged in outside tunnel model main body 1, pressure reducing valve 5-3 and fuel storage cylinder 5-4 structure At gas flowmeter 5-2 is connect with multi-orifice burner 5-1, and fuel storage cylinder 5-4 passes through pressure reducing valve 5-3 and gas flowmeter 5-2 Connection, by the rate of the adjustable supply fuel gas of adjusting gas flow meter 5-2, under the conditions of realizing different fire source powers Simulated combustion, and fire source power continuously adjusting in a certain range may be implemented.

Measuring wind speed record system is mainly by being arranged in 1 inside of tunnel model main body and close to the removable of rectification pipeline section 2-3 Dynamic wind speed probe tree 6-1 and the wind speed Acquisition Instrument 6-2 and computer 10 being arranged in outside tunnel model main body 1 are constituted.It is removable The output end of wind speed probe tree 6-1 is connect by wind speed Acquisition Instrument 6-2 with the input terminal of computer 10, and tunnel model master may be implemented The real-time measurement of 1 inside longitudinal ventilation of body records.Removable wind speed probe tree 6-1 is in " rice " type, and tunnel model master may be implemented The accurate measurement of longitudinal ventilation wind speed on 1 cross section of body.

Smoke temperature measurement record system mainly by be arranged in removable thermocouple tree 7-1 inside tunnel model main body 1, On the downside of the ceiling thermocouple linear array 7-2 of genesis analysis and be arranged in tunnel model body exterior temperature sensor 7-3 and Computer 10 is constituted.The output end of removable thermocouple tree 7-1 and the output end of thermocouple linear array 7-2 pass through temperature sensor 7-3 It is connect with the input terminal of computer 10, temperature sensor 7-3 selects 7018 temperature collecting modules, and tunnel model main body 1 may be implemented The real-time measurement of the vertical flue-gas temperature in space and ceiling flue-gas temperature record.Thermocouple is vertical in removable thermocouple tree 7-1 Spacing is generally no greater than 10cm, and multiple removable thermocouple tree 7-1 can be placed inside tunnel model main body 1.On the downside of ceiling Distance of the thermocouple linear array 7-2 apart from ceiling be 5cm, the spacing in thermocouple linear array 7-2 between two neighboring thermocouple is not More than 25cm.

Smoke components concentration analysis system is mainly by being arranged in the removable smoke collecting bar 8- inside tunnel model main body 1 1 and the flue gas analyzer 8-2 and computer 10 that are arranged in outside tunnel model main body 1 constitute.Removable smoke collecting bar 8-1's Output end is connect by flue gas analyzer 8-2 with the input terminal of computer 10, and 1 inside multiple spot position of tunnel model main body may be implemented Fire smoke ingredient analysis and concentration measurement, and record corresponding data in real time.

Video recording device is mainly by being arranged in laser light sheet 9-2 and video recorder outside tunnel model main body 1 9-3 is constituted.Laser light sheet 9-2 is placed on sheet laser bracket 9-1, and sheet laser bracket 9-1 is fixed on testing stand bracket 0. Laser light sheet 9-2 can be to 1 internal emission sheet laser of tunnel model main body clearly to show flue gas during ventilation smoke exhaust The Field Characteristics of movement.Video recorder 9-3 can be recorded in real time during state and the ventilation smoke exhaust of fire simulation experiment The Field Characteristics of smoke movement.

The working principle of the invention;

(1) course of work of longitudinal ventilation purging mode analog study is as follows:

It is first turned on video recorder 9-3, records the phenomenon in whole experiment process.Using gas fire source burns in experiment Tunnel fire hazard is simulated, the valve of fuel storage cylinder 5-4 is opened, pressure reducing valve 5-3 and gas flowmeter 5-2 is adjusted, lights porous combustion Burner 5-1 starts simulated combustion.The revolving speed for adjusting frequency conversion axial flow fan 2-1, provides uniform and stable into tunnel model main body 1 Longitudinal ventilation.Then the wind speed for opening measuring wind speed record systematic survey record longitudinal ventilation, opens smoke temperature measurement record Systematic survey records the temperature of flue gas, opens the ingredient and concentration of smoke components concentration analysis network analysis record hot fume Value.Etc. hot fumes flow field stablize after, observe the smoke discharging effect of longitudinal ventilation, record hot fume spreads adverse current to fire source upstream Length.Adjusting gas flow meter 5-2 changes the size of fire source power, and the revolving speed for adjusting frequency conversion axial flow fan 2-1 changes longitudinal direction The rate of ventilation, the smoke discharging effect of longitudinal ventilation purging mode under the conditions of analog study difference fire source power.

(2) course of work of transversal ventilation purging mode analog study is as follows:

It is needed in transversal ventilation purging mode analog study by longitudinal ventilation smoke evacuation system from a left side for tunnel model main body 1 End disassembles, and left end formation one is naturally open.It is first turned on video recorder 9-3, records showing in whole experiment process As.Then Electronic control opens all electronic exhaust smoke valve 3-3 and electric feeding air-valve 3-6.Liquid fire source burning mould is used in experiment Quasi- tunnel fire hazard, places food tray, adding liquid fuel in food tray lights food tray and starts simulated combustion on food tray bracket 4-1.It adjusts The revolving speed for saving frequency conversion axis air supply stream blower 3-5, is blown by air supply duct 3-4 into tunnel model main body 1.Adjust frequency conversion axis stream The revolving speed of smoke exhaust fan 3-2 is discharged fume from tunnel model main body 1 by smoke discharging pipe 3-1.Open smoke temperature measurement record system The temperature of unified test amount record flue gas.Etc. hot fumes flow field stablize after, observe the smoke discharging effect of transversal ventilation, record hot cigarette The range of gas sprawling diffusion.It replaces various sizes of food tray and liquid fuel changes the size of fire source power, adjust frequency conversion axis The revolving speed of air supply stream blower 3-5 and frequency conversion axis stream smoke exhaust fan 3-2 change the rate of transversal ventilation smoke evacuation, and analog study is different The smoke discharging effect of transversal ventilation purging mode under the conditions of fire source power.

(3) course of work of semi-transverse ventilation purging mode analog study is as follows:

It is needed in semi-transverse ventilation purging mode analog study by longitudinal ventilation smoke evacuation system from a left side for tunnel model main body 1 End disassembles, and left end formation one is naturally open.It is first turned on video recorder 9-3, records showing in whole experiment process As.Then Electronic control opens all electronic exhaust smoke valve 3-3.Liquid fire source combustion simulation tunnel fire hazard is used in experiment, in oil Food tray is placed on disc holder 4-1, adding liquid fuel in food tray lights food tray and starts simulated combustion.Adjust the smoke evacuation of frequency conversion axis stream The revolving speed of blower 3-2 is discharged fume from tunnel model main body 1 by smoke discharging pipe 3-1, and both ends open forms nature and mends wind.It opens Smoke temperature measurement records the temperature of systematic survey record flue gas.Etc. hot fumes flow field stablize after, observe semi-transverse ventilation Smoke discharging effect, record hot fume sprawling diffusion range.It replaces various sizes of food tray and liquid fuel changes fire source function The size of rate, the revolving speed for adjusting frequency conversion axis stream smoke exhaust fan 3-2 change the rate of semi-transverse ventilation smoke evacuation, the different fire of analog study The smoke discharging effect of semi-transverse ventilation purging mode under the conditions of source power.

(4) course of work of emphasis ventilation smoke exhaust pattern simulation research is as follows:

It needs longitudinal ventilation smoke evacuation system in the research of emphasis ventilation smoke exhaust pattern simulation from the left end of tunnel model main body 1 It disassembles, left end formation one is naturally open.It is first turned on video recorder 9-3, records the phenomenon in whole experiment process. Then Electronic control opens the electronic exhaust smoke valve 3-3 in part being located above fire source.Liquid fire source combustion simulation tunnel is used in experiment Road fire places food tray on food tray bracket 4-1, and adding liquid fuel in food tray lights food tray and starts simulated combustion.It adjusts and becomes The revolving speed of frequency axis stream smoke exhaust fan 3-2, is discharged fume from tunnel model main body 1, both ends open forms nature by smoke discharging pipe 3-1 Mend wind.Open the temperature of smoke temperature measurement record systematic survey record flue gas.Etc. hot fumes flow field stablize after, observation weight The effect of point ventilation smoke exhaust, the range of record hot fume sprawling diffusion.It replaces various sizes of food tray and liquid fuel changes The size of fire source power, the revolving speed for adjusting frequency conversion axis stream smoke exhaust fan 3-2 change the rate of emphasis ventilation smoke exhaust, change electronic row The quantity that cigarette valve 3-3 is opened, the smoke discharging effect of emphasis ventilation smoke exhaust mode under the conditions of analog study difference fire source power.

Embodiment described above is only that preferred embodiments of the present invention will be described, not to model of the invention It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.

Claims (10)

1. a kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform, it is characterised in that: including tunnel Die body, longitudinal ventilation smoke evacuation system, transversal ventilation smoke evacuation system, semi-transverse ventilation smoke evacuation system, fire source combustion simulation System and measurement-recording system;
The longitudinal ventilation smoke evacuation system is mainly made of frequency conversion axial flow fan and rectification pipeline section;The frequency conversion axial flow fan goes out Air port is connected to one end of rectification pipeline section, and the other end of the rectification pipeline section is connected by detachable interface and tunnel model main body It is logical;
The transversal ventilation smoke evacuation system is mainly by smoke discharging pipe, frequency conversion axis stream smoke exhaust fan, electronic exhaust smoke valve, air supply tube Road, frequency conversion axis air supply stream blower and electric feeding air-valve are constituted;The smoke discharging pipe is by being arranged in tunnel model main body internal upper part Gap between ceiling and tunnel model body top is constituted;The frequency conversion axis stream smoke exhaust fan has two, the row of being separately mounted to The both ends exit of smoke pipeline;The electronic exhaust smoke valve has several, is separately mounted to each row equidistantly opened up on ceiling At mouth;The air supply duct is by being arranged in the sky in tunnel model main body between the bottom plate of lower part and tunnel model bottom part body Gap is constituted;The frequency conversion axis air supply stream blower has two, is separately mounted to the both ends entrance of air supply duct;The powered supplied air Valve has several, is separately mounted at each air outlet equidistantly opened up on bottom plate;
The semi-transverse ventilation smoke evacuation system is mainly made of smoke discharging pipe, frequency conversion axis stream smoke exhaust fan and electronic exhaust smoke valve;Institute Stating smoke discharging pipe, frequency conversion axis stream smoke exhaust fan and electronic exhaust smoke valve is transversal ventilation smoke evacuation system and semi-transverse ventilation smoke evacuation system System shares, i.e., the described semi-transverse ventilation smoke evacuation system is a part of transversal ventilation smoke evacuation system;
The fire source combustion simulation system includes liquid fire source combustion simulation system and gas fire source combustion simulation system;
The measurement-recording system includes measuring wind speed record system, smoke temperature measurement record system, smoke components concentration point Analysis system and video recording device.
2. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the tunnel model main body is connected and composed by the dismountable circular cross-sectional cavity unit of several sections, each section chamber list The leading flank of member is mounted on a curved strengthened glass window, and the curved strengthened glass window outwardly opens from top to bottom.
3. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the cross-sectional area of the frequency conversion axial flow fan in the longitudinal ventilation smoke evacuation system is greater than the cross section of tunnel model main body Long-pending, the frequency conversion axial flow fan in the longitudinal ventilation smoke evacuation system is connected to by reducing pipe with rectification pipeline section, the rectification pipeline section Length be greater than 3m.
4. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the liquid fire source combustion simulation system mainly by for placing food tray food tray bracket, for real-time measurement record The electronic balance and computer of liquid fuel quality are constituted, and one end of the food tray bracket is placed on an electronic balance, and the other end is stretched Enter tunnel model body interior, the output end of the electronic balance and the input terminal of computer connect.
5. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the gas fire source combustion simulation system is mainly by being arranged in the multi-orifice burner of tunnel model body interior and setting Set the gas flowmeter in tunnel model body exterior, pressure reducing valve and fuel storage cylinder are constituted, the gas flowmeter with it is porous Burner connection, the fuel storage cylinder are connect by pressure reducing valve with gas flowmeter.
6. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the measuring wind speed record system is mainly by being arranged in tunnel model body interior and close to the removable of rectification pipeline section Wind speed probe tree and the wind speed Acquisition Instrument and computer composition that tunnel model body exterior is set, the removable wind speed probe The output end of tree is connected by the input terminal of wind speed Acquisition Instrument and computer.
7. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: smoke temperature measurement record system mainly by be arranged in tunnel model body interior removable thermocouple tree, The thermocouple linear array of genesis analysis and the temperature sensor and computer structure of tunnel model body exterior are set on the downside of the ceiling At the output end of the removable thermocouple tree and thermocouple linear array is connected by the input terminal of temperature sensor and computer.
8. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the smoke components concentration analysis system is mainly by being arranged in the removable smoke collecting bar of tunnel model body interior And the flue gas analyzer and computer composition of tunnel model body exterior, the output end of the removable smoke collecting bar are set It is connected by the input terminal of flue gas analyzer and computer.
9. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the video recording device is mainly by being arranged in the laser light sheet and video recorder structure of tunnel model body exterior At the laser light sheet is used for tunnel model body interior transmitting sheet laser clearly to show cigarette during ventilation smoke exhaust The dynamic Field Characteristics of fate, the video recorder for recording the state and ventilation smoke exhaust process of fire simulation experiment in real time The Field Characteristics of middle smoke movement.
10. multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform according to claim 1, special Sign is: the length of the tunnel model main body is 30m or more.
CN201710336692.0A 2017-05-13 2017-05-13 A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform CN106971666B (en)

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CN107503794B (en) * 2017-07-31 2019-05-31 南京中灿科技有限公司 Subway sectional tunnel accident smoke evacuation wind speed determines method
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