CN110111635B - Double-long-narrow space fire experiment platform for small-size subway tunnel/train carriage - Google Patents
Double-long-narrow space fire experiment platform for small-size subway tunnel/train carriage Download PDFInfo
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- CN110111635B CN110111635B CN201910484994.1A CN201910484994A CN110111635B CN 110111635 B CN110111635 B CN 110111635B CN 201910484994 A CN201910484994 A CN 201910484994A CN 110111635 B CN110111635 B CN 110111635B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 50
- 238000009423 ventilation Methods 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 12
- 239000000779 smoke Substances 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 8
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 28
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 26
- 239000001294 propane Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000005341 toughened glass Substances 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 7
- 230000006399 behavior Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 230000002265 prevention Effects 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000005549 size reduction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 239000005340 laminated glass Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004379 similarity theory Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- G09B9/00—Simulators for teaching or training purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention discloses a double-long and narrow space fire experiment platform for a contracted size subway tunnel/train carriage, which comprises a tunnel unit, a train unit, a track unit, a fire source simulation unit, a longitudinal ventilation unit and a fire parameter measurement unit. Wherein: the tunnel unit adopts an arc-shaped ceiling structure and is located on the ground; the train unit is placed in the tunnel unit, and the movement of the train unit is controlled by the track unit on the ground; the fire source simulation unit is arranged in the train unit and is used for generating fire plumes required by experiments; the longitudinal ventilation unit is arranged at one end of the tunnel unit and is used for providing longitudinal ventilation; the fire parameter measurement unit is used for collecting various parameters in the experiment. The invention overcomes the defects of high cost and inaccurate numerical simulation of full-scale experiments, can develop a series of basic theory researches such as fire plume entrainment characteristics, smoke transportation behaviors and the like when train fires occur in subway tunnels, and has practical guiding significance for fire detection, smoke control and personnel evacuation in the fire scene.
Description
Technical Field
The invention relates to the technical field of fire safety, in particular to a double-long and narrow space fire experiment platform for a reduced-size subway tunnel/train carriage.
Background
The subway has the characteristics of large passenger transportation amount and underground operation space, and has important significance for relieving the increasingly stressed urban road traffic pressure. However, subways bring convenience to life of people and also bring new challenges to fire control. Statistics result shows that 85% of people in the fire are dead due to toxic gas inhaled by human body, and accumulated high-temperature smoke can cause secondary disasters such as breakage and even collapse of tunnel structures.
Although the subway train is required to travel to the next station in a decelerating way after a fire disaster occurs in the interval tunnel according to related standard requirements, related people evacuation escape and rescue fire extinguishing work is carried out. However, in actual situations, after the subway train catches fire, part of the subway train loses power and stays in the section tunnel and cannot travel to the next station, and at the moment, the train forms an obstacle with a large blocking ratio in the tunnel space, so that a special double-long and narrow space is formed together with the tunnel. Therefore, the research on the entrainment characteristics of the fire plumes and the smoke transportation behaviors in the double long and narrow spaces of the subway tunnel/train carriage under different boundary conditions has important significance.
Since the full-size fire experiment requires a lot of manpower and financial resources, the experimental conditions are difficult to control, and a lot of reliable experimental data are difficult to obtain. In contrast, the development of the size reduction experiment meeting the similarity theory has the advantages of low cost, strong repeatability and high result reliability. Therefore, the size reduction experiment is widely applied to fire research.
At present, domestic scholars have conducted a great deal of research on subway tunnel fires, zhang Heping and the like design a small-size multifunctional subway tunnel fire experiment platform to research the combustion behavior and smoke control of fires under different tunnel types and structures, chen Xiao and the like design a subway tunnel fire experiment platform adopting a non-straight axis jet fan to mechanically exhaust smoke to research the smoke exhaust effect of the non-straight axis jet fan. However, the existing reduced-size subway tunnel fire experiment platform has certain limitations in structure and function, wherein: structurally, the cross section of the experimental platform is mostly rectangular, while the actual subway tunnel is mostly arc-shaped, and the cross section and the arc-shaped structure have larger difference; functionally, the experiment platform can only simulate the fire scene without trains in the subway tunnel, and can not simulate the situation that the train carriage stays in the tunnel due to power failure when the train carriage breaks out of fire.
Disclosure of Invention
The invention aims to solve the structural and functional defects of the existing reduced-size subway tunnel fire experiment platform and provides a reduced-size subway tunnel/train carriage double-long and narrow space fire experiment platform for solving the problems.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a double-long-narrow space fire experiment platform for a reduced-size subway tunnel/train carriage comprises a tunnel unit, a train unit, a track unit, a fire source simulation unit, a longitudinal ventilation unit and a fire parameter measurement unit; wherein:
the experiment platform is a reduced size model, and the similarity ratio of the experiment platform to the actual size is 1:3;
the tunnel unit is located on the ground and formed by splicing multiple sections of identical sub-tunnels, and comprises a tunnel frame, an arc-shaped ceiling, side walls on two sides and a side vertical hinged door on one side;
the train unit is arranged in the tunnel unit and is formed by splicing a plurality of identical sub carriages, and comprises a train frame, a bracket, a ceiling, a bottom plate, two ends, side walls at two sides and a sliding window at one side;
the track unit comprises a metal guide rail, a metal hanging ring and an electric traction machine, and the metal guide rail is arranged on the longitudinal central line of the tunnel unit;
the fire source simulation unit is placed in the train unit and comprises an n-heptane oil pool fire source and a propane gas fire source;
the longitudinal ventilation unit is arranged at one end of the tunnel unit and comprises a variable frequency fan and a rectifying section for connecting the variable frequency fan with the tunnel unit;
the fire parameter measurement unit comprises a temperature test system, a wind speed test system, a smoke flow field monitoring system and an image recording system.
The tunnel frames are built by angle steel and a bending plate at the top; the arc-shaped ceiling and one side wall are formed by fireproof plates, wherein the fireproof plates of the ceiling are bendable plates, and the fireproof plates of the side walls are flat plates; the side wall of the other side and the vertical hinged door are made of toughened glass, so that the experiment is convenient for personnel to arrange the experiment before and after the experiment and observe the experimental phenomenon in the experimental process.
The carriages of the sections are connected by flanges, the train frame is built by adopting an angle steel structure, the bracket is built by adopting a square pipe structure, and the bottom of the bracket is provided with pulleys so as to be convenient to move; the ceiling, the bottom plate, the two ends and one side wall are formed by fireproof plates, and the fireproof plates are flat plates; the side wall and the sliding window on the other side are made of toughened glass, so that experimental phenomena can be conveniently observed, and fire scenes under different train door states can be researched.
The metal lifting rings in the track units are fixed at two ends of the train, and the electric traction machine is connected with the metal lifting rings through steel wire ropes to control the train to move on the metal guide rail.
The fire source type in the fire source simulation unit can select an n-heptane oil pool fire source or a propane gas fire source according to experimental requirements; the fire source of the n-heptane oil tank consists of a square oil tank, an I-shaped metal tray and an electronic balance; the propane gas fire source consists of a porous gas burner, a rotameter, a propane gas cylinder and a gas supply pipe.
The rectifying section in the longitudinal ventilation unit sequentially comprises a rectifying tube, a damping net and a honeycomb rectifier according to the air supply direction, and the normal direction and tangential speed of air flow can be set simultaneously in the combined mode, so that the uniformity of a flow field is greatly improved, and the accuracy of experiments is guaranteed.
The temperature testing system in the fire parameter measuring unit comprises thermocouples and a data acquisition module, wherein the thermocouples are respectively arranged on a longitudinal central line of a position 2cm below the ceilings of the tunnel unit and the train unit and a vertical central line of each sliding window; the wind speed test system is a multi-channel anemometer and is arranged on a longitudinal central line which is 3m away from the air inlet of the tunnel unit and 0.5m away from the ground; the flow field monitoring system is a laser sheet light source and is arranged at one end of an air outlet of the tunnel unit; the image recording system is a digital camera and is arranged on one side of the toughened glass surface of the tunnel unit.
The beneficial effects produced by adopting the technical scheme are that: compared with the existing subway tunnel experiment table, the double-long and narrow space fire experiment table for the reduced-size subway tunnel/train carriage has the advantages that the structure is more practical, the functions are more complete, and the double-long and narrow space fire experiment table is specifically characterized in that:
(1) The tunnel ceiling adopts an arc-shaped structure which is in line with reality. The cross section of the tunnel is horseshoe-shaped, the radian of the ceiling is 150 degrees, and the size of the tunnel is compared with the size of an actual subway tunnel, so that the similarity condition of equivalent hydraulic diameter and equivalent height is met. Hydraulic diameter and height are two important parameters affecting flue gas temperature distribution in tunnel fires: the larger the hydraulic diameter is, the more heat is lost in the flue gas spreading process; the lower the height, the stronger the restriction of the ceiling to the fire plume.
(2) The tunnel is large in size, the similarity ratio of the tunnel size to the actual subway tunnel size is 1:3, and the arrangement of experiments in the tunnel is convenient for people to enter.
(3) In fact, fires in subway tunnels mostly occur in railcars. When the fire is large, part of trains lose power and stop in the tunnel, and the trains form barriers with large blocking ratio in the tunnel space, so that a double long and narrow space is formed together with the tunnel. The experimental platform can simulate and study fire disaster under the scene. In addition, the train can be placed outside the tunnel, and basic research on tunnel fire and train fire can be carried out respectively.
(4) The use of the metal guide rail and the electric traction machine is convenient for changing the position of the train, and experimental errors caused by the fact that the train deviates from the central line of the tunnel can be avoided.
(5) By controlling the opening or closing of the sliding window of the train, the fire scene under different train door states can be studied.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a double-long and narrow space fire experiment platform of a reduced-size subway tunnel/train carriage.
Fig. 2 is a tunnel unit of a double-long and narrow space fire experiment platform of a reduced-size subway tunnel/train car shown in fig. 1.
Fig. 3 is a train unit of the double elongated space fire experiment platform of a reduced size subway tunnel/train car shown in fig. 1.
Fig. 4 is a track unit of a double elongated space fire experiment platform for a reduced size subway tunnel/railcar shown in fig. 1.
Fig. 5 is a fire source simulation unit of a double-long and narrow space fire experiment platform of a reduced-size subway tunnel/train carriage shown in fig. 1, wherein fig. 5 (a) is an n-heptane oil pool fire source and fig. 5 (b) is a propane gas fire source.
Fig. 6 is a longitudinal ventilation unit of the double-elongated space fire experiment platform of the reduced-size subway tunnel/train car shown in fig. 1.
Detailed Description
The present invention will be described in detail below by way of embodiments according to the present invention with reference to the accompanying drawings. For clarity of description, the directions or positional relationships indicated by the "upper", "lower", "left", "right", etc. are introduced based on the directions or positional relationships shown in the drawings.
As shown in fig. 1, the double-long and narrow space fire experiment platform for the reduced-size subway tunnel/train carriage comprises a tunnel unit 1, a train unit 2, a track unit 3, a fire source simulation unit 4, a longitudinal ventilation unit 5 and a fire parameter measurement unit 6.
As shown in fig. 2, in order to save construction cost and facilitate shooting experimental phenomena, the cross-sectional shape of an actual tunnel is approximately processed on the basis of satisfying the equivalent hydraulic diameter and the equivalent height, and the tunnel is adjusted to be horseshoe-shaped with 150-degree circular arcs on both sides.
The tunnel unit 1 is spliced together through flange connection by the same sub-tunnel 7 of multisection, and the size of sub-tunnel 7 is 3m (length) 1.6m (width) x 1.6m (height), and width and height are the maximum value of cross section, and the similarity ratio with actual subway tunnel size is 1:3, makes things convenient for personnel to get into the tunnel inside and arranges the experiment, and the total length of tunnel can be adjusted according to the experimental requirement. Considering the problem of bearing, so with the tunnel direct be located on ground, the bottom does not set up the bottom plate, and the gap between ground carries out sealing treatment with the fire prevention glue.
The tunnel frame is built by the bent plate at angle steel and top, and arc ceiling 8 comprises flexible PLASTIC LAMINATED, and lateral wall 9 at rear comprises fire prevention flat board, and preceding lateral wall 10 and vertical hinged door 11 are by toughened glass constitution, and the PLASTIC LAMINATED splices with tunnel frame is sealed, and fire prevention glass seals embedding tunnel frame in, and the thickness of PLASTIC LAMINATED and toughened glass is 10mm. When the experiment is arranged, a person can open the fastening lock 12 arranged on the angle steel to open the vertical hinged door 11 to enter the tunnel.
As shown in fig. 3, the train unit 2 is formed by splicing a plurality of identical sub-carriages 13 by flange connection, the size of the sub-carriages 13 is 1.65m (length) ×0.93m (width) ×0.7m (height), and the total length of the train can be adjusted according to experimental requirements.
The train frame is built by the angle steel, and train ceiling 14, bottom plate 15, both ends's lateral wall 16 and rear lateral wall 17 constitute by fire prevention flat board, and preceding lateral wall 18 and sliding window 19 constitute by toughened glass, and fire prevention board and train frame seal splice, and fire prevention glass seals embedding tunnel frame in, and the thickness of fire prevention board and toughened glass is 10mm.
The train support 20 is built by square pipes, is 0.4m high, and is provided with pulleys at the bottom, so that the train can be conveniently moved. In the experiment, fireproof plates can be respectively placed around the bracket to simulate the space occupied by an electric system at the bottom of an actual train. The width of the fireproof plates at the left end and the right end is consistent with the width of the train, the length of the fireproof plates at the front side and the rear side is consistent with the length of the train, the heights are 0.4m, and the fireproof plates are bonded and sealed with the train frame through fireproof glue.
As shown in fig. 4, the track unit 3 is constituted by a metal rail 21 arranged on the tunnel center line and electric tractors 22 at both ends of the tunnel. The steel wire rope on the electric tractor 22-1 at the right end of the tunnel is connected with the metal hanging ring 23-1 at the right end of the train unit, and the electric tractor 22-1 controls the train to move rightwards. The steel wire rope on the electric tractor 22-2 can be led into the tunnel by opening a vertical hinged door 11 at the left end of the tunnel to be connected with a metal hanging ring 23-2 at the left end of the train, and the electric tractor 22-2 controls the train to move leftwards.
As shown in fig. 4, the n-heptane oil pool fire source in the fire source simulation unit 4 consists of a square metal oil pool 24, an I-shaped metal tray 25 and an electronic balance 26, and different fire source powers are realized by selecting the square metal oil pools 24 with different sizes. The electronic balance 26 is placed on the ground, the base of the metal tray 25 is placed on the electronic balance 26, the inside of the base sleeve 27 is in a threaded structure, the tray above and the matched threaded rod 28 are inserted into the base sleeve 27 through drilling holes on the train bottom plate 15, the height of the tray is adjusted through fastening screws 29, then the square metal oil pool 24 is placed on the tray 25, n-heptane is poured in, and ignition is performed by an igniter.
The propane gas fire source is composed of a porous gas burner 30, a rotameter 31, a propane gas cylinder 32, and a gas supply pipe 33. The propane gas cylinder 32 is connected to the rotameter 31 through a gas supply pipe 33-1 and then to a circular hole under the bottom of the porous gas burner 30 through another gas supply pipe 33-2, and the porous gas burner 30 enters the train through an opening in the train floor 15. After the gas cylinder valve is opened and the pressure reducing valve is regulated to control the gas pressure to a stable value, the gas flow is controlled through the rotameter 31, and the propane gas is respectively led into the porous gas burner 30 through the propane gas cylinder 32, the gas supply pipe 33-1, the rotameter 31 and the gas supply pipe 33-2 and finally is ignited by the igniter. The support structure of the porous gas burner 30 is similar to the metal tray 25, and thus, description thereof will not be repeated here.
As shown in FIG. 5, the variable frequency fan 34 in the longitudinal ventilation unit 5 has an air volume of 45000m 3 And/h, the wind speed requirement required by daily experiments can be met, and the longitudinal ventilation rate can be changed by adjusting the frequency. The cross-sectional shape of the rectifying section 35 is kept identical to the horseshoe-shaped cross-section of the tunnel unit 1, and the frame is constructed of square tubes and is sealed with sealing plates for upper, lower, front and rear faces. The rectifying section 35 comprises a rectifying tube 36, a damping net 37 and a honeycomb rectifier 38 in sequence according to the ventilation direction. Length L of rectifier tube 36 1 Not less than 1m, and completely filling the cross section of the rectifying section; the number of the damping nets 37 is not less than three, the mesh number is 18-30 mesh, and the distance L between the damping nets 37 2 Not less than 0.4m; spacing L between honeycomb rectifier 38 and damping net 37 3 And L is equal to 2 Similarly, the width of the honeycomb rectifier 38 was 0.2m, and the inscribed circle radius of the rectifying through hole of the regular hexagon was 2cm. The combination mode can set the normal direction and tangential speed of the airflow at the same time, greatly improves the uniformity of the flow field, and ensures the accuracy of experiments. The rectifying section 35 and the variable frequency fan 34 are welded together by a fan connecting plate 39.
As shown in fig. 1, thermocouples 40 are respectively arranged on the longitudinal center lines of the tunnel unit 1 and the train unit 2 at a position of 2cm below the ceiling and on the vertical center line of each sliding window, and are fixed by thermocouple frames for measuring the temperatures of the flue gas overflowed from the cabin and below the ceiling, respectively. The interval between thermocouples 40 can be adjusted according to the experimental requirements, and the measurement results are transmitted to a computer through a data acquisition module. The probe of the multi-channel anemometer 41 is arranged on the longitudinal centerline at a distance of 0.5m from the tunnel unit air intake 3m, for measuring the longitudinal wind speed in the tunnel. The laser sheet light source 42 is disposed at the right end of the tunnel unit 1, and the movement trace of the smoke layer, such as the spreading distance, spreading speed, sedimentation speed, etc., can be more clearly observed by the emitted green light. A digital camera 43 is placed on the front side of the tunnel unit 1 for recording the flame morphology during the experiment.
Claims (4)
1. A double long and narrow space fire experiment platform of a reduced size subway tunnel/train carriage is characterized in that: the system comprises a tunnel unit, a train unit, a rail unit, a fire source simulation unit, a longitudinal ventilation unit and a fire parameter measurement unit; wherein:
the experiment platform is a reduced size model, and the similarity ratio of the experiment platform to the actual size is 1:3;
the tunnel unit (1) is located on the ground and formed by splicing a plurality of identical sub-tunnels, and comprises a tunnel frame, an arc-shaped ceiling, side walls on two sides and a side vertical hinged door on one side; sealing the gap between the tunnel unit (1) and the ground by using fireproof glue; the fireproof plate is spliced with the tunnel frame in a sealing way, and the fireproof glass is embedded into the tunnel frame in a sealing way;
the train unit (2) is arranged in the tunnel unit (1) and is formed by splicing a plurality of identical sub carriages, and comprises a train frame, a bracket, a ceiling, a bottom plate, side walls at two ends and two sides and a sliding window at one side;
the track unit (3) comprises a metal guide rail, a metal hanging ring and an electric traction machine, wherein the metal guide rail is arranged on the longitudinal central line of the tunnel unit (1);
the fire source simulation unit (4) is arranged in the train unit (2) and comprises an n-heptane oil pool fire source and a propane gas fire source;
the longitudinal ventilation unit (5) is arranged at one end of the tunnel unit (1) and comprises a variable frequency fan and a rectifying section for connecting the variable frequency fan with the tunnel;
the fire parameter measurement unit (6) comprises a temperature test system, a wind speed test system, a smoke flow field monitoring system and an image recording system;
all the section sub-tunnels of the tunnel unit (1) are connected by flanges, and a tunnel frame is built by angle steel and a bending plate at the top; the arc-shaped ceiling and one side wall are formed by fireproof plates, wherein the fireproof plates of the ceiling are bendable plates, and the fireproof plates of the side walls are flat plates; the side wall and the vertical hinged door on the other side are made of toughened glass, so that the experiment is convenient for personnel to observe the experimental phenomenon in the process of arranging the experiment before and after the experiment;
all the sub carriages of the train unit (2) are connected by adopting flanges, the train frame is built by angle steel, the bracket is built by square pipes, and pulleys are arranged at the bottom of the bracket so as to be convenient for movement; the ceiling, the bottom plate, the two ends and the side wall on one side are formed by fireproof plates, and the fireproof plates are flat plates; the side wall and the sliding window on the other side are made of toughened glass, so that experimental phenomena can be conveniently observed, and fire scenes in different train door states can be studied;
the metal hanging rings in the track units (3) are fixed at two ends of the train, and the electric traction machine is connected with the metal hanging rings through steel wire ropes to control the train to move on the metal guide rail;
the electric traction machine is positioned at two ends of the tunnel, a steel wire rope on the electric traction machine (22-1) at the right end of the tunnel is connected with a metal hanging ring (23-1) at the right end of the train unit, the train is controlled to move rightwards through the electric traction machine (22-1), and the steel wire rope on the electric traction machine (22-2) can be led into the tunnel through opening a vertical hinged door (11) at the left end of the tunnel to be connected with the metal hanging ring (23-2) at the left end of the train, and the train is controlled to move leftwards through the electric traction machine (22-2).
2. The reduced size subway tunnel/railcar double elongated space fire experiment platform according to claim 1, wherein: the fire source type in the fire source simulation unit (4) can select an n-heptane oil pool fire source or a propane gas fire source according to experimental requirements; the fire source of the n-heptane oil tank consists of a square oil tank, an I-shaped metal tray and an electronic balance; the propane gas fire source consists of a porous gas burner, a rotameter, a propane gas cylinder and a gas supply pipe.
3. The reduced size subway tunnel/railcar double elongated space fire experiment platform according to claim 1, wherein: the rectifying section in the longitudinal ventilation unit (5) sequentially comprises a rectifying tube, a damping net and a honeycomb rectifier according to the air supply direction, and the normal direction and tangential speed of air flow can be set simultaneously in the combined mode, so that the uniformity of a flow field is greatly improved, and the accuracy of experiments is ensured.
4. The reduced size subway tunnel/railcar double elongated space fire experiment platform according to claim 1, wherein: the temperature testing system in the fire parameter measuring unit (6) comprises thermocouples and a data acquisition module, wherein the thermocouples are respectively arranged on a longitudinal central line of a position 2cm below the ceilings of the tunnel unit (1) and the train unit (2) and on a vertical central line of each sliding window; the wind speed test system is a multi-channel anemometer and is arranged on a longitudinal central line which is 3m away from the air inlet of the tunnel unit (1) and 0.5m away from the ground; the flow field monitoring system is a laser sheet light source and is arranged at one end of an air outlet of the tunnel unit (1); the image recording system is a digital camera and is arranged on one side of the toughened glass surface of the tunnel unit (1).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110148348A (en) * | 2019-06-06 | 2019-08-20 | 应急管理部四川消防研究所 | Large size city synthesis fire test reduced scale platform data test macro |
| CN111462606B (en) * | 2020-04-21 | 2022-04-26 | 合肥工业大学 | Traffic tunnel group smoke cross flow research and emergency rescue system |
| CN114061996B (en) * | 2021-10-13 | 2024-03-26 | 北京工业大学 | Device for simulating longitudinal ventilation smoke control effect of highway tunnel fire and smoke control method |
| CN116052501B (en) * | 2023-02-27 | 2024-05-07 | 中国科学技术大学 | High-speed subway train carriage and train bottom fire simulation system and control method thereof |
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