Reduced-size tunnel fire experiment table capable of moving fire source in real time

Abstract

The invention provides a reduced-size tunnel fire experiment table capable of moving a fire source in real time, which comprises a table, a platform is arranged above the table, a tunnel main body is arranged on the platform, and the tunnel main body comprises a tunnel bottom surface, tunnel wall surfaces positioned on two sides of the tunnel bottom surface and a tunnel arc top, a chain type conveying belt power system used for transporting a fire source is arranged on the inner side of the tunnel body. The chain type conveying belt power system comprises a servo motor, a transmission shaft and a chain type conveying belt. The chain type conveying belt rotates around the bottom face of the tunnel through the transmission shaft. The output end of the servo motor is connected with a planetary reducer used for reducing the output power of the motor, the planetary reducer is connected with a transmission shaft, and the planetary reducer drives the transmission shaft to rotate to achieve rolling of the chain type conveying belt. Controllable continuous movement of a fire source in the tunnel is achieved, the development process of flames and smoke in the tunnel is observed through the glass on the side face of the tunnel, and meanwhile the smoke form outside the tunnel is observed through the outlets in the two sides.

Description

Technical Field

[0001] The invention belongs to the technical field of test benches, and in particular relates to a reduced-size tunnel fire test bench capable of moving a fire source in real time. Background Art

[0002] Tunnel fire accidents have occurred frequently in recent years, and their high risk has attracted widespread attention. Due to the particularity of the tunnel structure, it is usually a long-distance semi-enclosed space. Once a fire occurs, it is difficult for the fire source and smoke to spread quickly to the outside. The fire spreads rapidly in the tunnel, resulting in a large accumulation of high temperature, thick smoke, and toxic and harmful gases. These harmful substances will not only seriously affect the visual distance in the tunnel, but also hinder the escape and rescue work, and pose a direct threat to the life safety of people stranded in the tunnel. In particular, toxic gases produced during the combustion process, such as carbon monoxide and hydrogen cyanide, can cause people to be poisoned, lose consciousness, or even suffocate to death in a short period of time, which brings huge challenges to fire rescue.

[0003] After a tunnel fire occurs, it is usually difficult to visually judge the specific development of the fire due to the semi-enclosed nature of the tunnel. Thick smoke and rapid flame spread make it difficult for rescue workers to determine the specific location of the fire source and the direction of the fire. At the same time, the high temperature environment in the tunnel exacerbates the uncontrollability of the fire situation. The fire may spread rapidly along the longitudinal direction of the tunnel, further increasing the difficulty of firefighting.

[0004] Firefighters usually face a series of extremely unfavorable conditions when entering tunnels to carry out firefighting and rescue work. First, visibility in the tunnel is extremely low, and smoke blocks the view, making it difficult for firefighters to quickly determine the source of the fire and the location of people trapped in the tunnel. Second, due to the large amount of toxic gases produced by the fire, firefighters not only have to wear heavy protective equipment, but also need to pay close attention to their own safety to prevent injuries in the environment of high temperature and harmful gases. These unfavorable factors make the dispatch of rescue equipment and personnel more difficult.

[0005] Therefore, fighting tunnel fires often requires accurate fire detection and positioning technology in order to keep abreast of the fire development and smoke spread. Existing fire monitoring methods, such as thermal imaging, smoke detectors, and video surveillance, may be affected by high temperatures, strong light, and smoke in tunnel fire scenes, and cannot provide accurate information feedback, further increasing the difficulty of rescue work. In this context, how to quickly obtain fire information, ensure the safety of firefighters, and effectively carry out rescue operations has become a key challenge in dealing with tunnel fires.

[0006] In order to help firefighters better complete fire rescue and personnel evacuation work, it is necessary to study the development laws of tunnel fires and smoke. However, conducting full-scale tunnel fire experiments requires a lot of manpower and material resources and is difficult to repeat. In contrast, conducting scaled-down tunnel fire experiments can overcome the above difficulties and ensure the accuracy of the experiment through similar criteria. However, the existing scaled-down tunnel fire test benches only use fixed fire sources, and rarely consider that in real tunnel fires, the fire sources are mostly in a mobile state, such as a burning car, and the fire development and smoke spread of mobile fire sources are different from those of static fire sources. Therefore, how to reproduce mobile fire sources in scaled-down tunnel fire experiments has become an urgent problem to be solved.

[0007] An existing small-sized multifunctional tunnel fire test platform (CN10563231 A) includes a tunnel body, manual doors on both sides of the tunnel body, a base support with a lifting function, a shaft on the tunnel roof, a ventilation system arranged on one side of the test platform, a fire source simulation system, and a matching monitoring system arranged inside the tunnel. The tunnel body is composed of multiple identical and horizontally disassembled sub-tunnels, which can conveniently adjust the tunnel length. By adjusting the height of the base support of each sub-tunnel, the tunnel slope can be controlled. The manual doors on both sides of the tunnel can be manually controlled to open and close. Card slots are provided at different heights in the tunnel, and the aspect ratio of the cross section of the tunnel is changed by embedding an additional bottom plate. The test platform uses a fixed fire source for experiments, which cannot simulate the behavior of vehicles moving while on fire in an actual tunnel, that is, it cannot simulate a mobile fire source. Although the setting of a fixed fire source can provide certain experimental data, it cannot truly reflect the dynamic changes of the fire source in the tunnel, such as the impact of the change in the position of the fire source on the development of the fire.

[0008] In an existing reduced-size subway tunnel / train car double narrow space fire test platform (CN210244688U), it includes 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 its movement is controlled by the track unit on the ground; the fire source simulation unit is placed in the train unit to generate the fire plume required for the experiment; the longitudinal ventilation unit is placed at one end of the tunnel unit to provide longitudinal ventilation; the fire parameter measurement unit is used to collect various parameters in the experiment. It uses a traction rope to move the fire source in the tunnel. Although this design can simulate a dynamic fire source, due to the interference of the traction rope, the wind speed, temperature, oxygen supply, smoke flow, etc. in the tunnel will be different from the real tunnel situation. Summary of the invention

[0009] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to develop a tunnel model with reduced size. By setting a transmission scheme, the combustion behavior of a mobile fire source can be fully reproduced without interfering with the internal space of the tunnel, so as to help study the development law of tunnel fire.

[0010] The present invention is achieved by at least one of the following technical solutions.

[0011] A reduced-size tunnel fire test bench capable of moving a fire source in real time comprises a table, a platform is provided above the table, a tunnel body is arranged on the platform, the tunnel body comprises a tunnel bottom surface, tunnel walls located on both sides of the tunnel bottom surface and a tunnel arc top, and a chain conveyor belt power system for transporting the fire source is provided inside the tunnel body.

[0012] As a preferred embodiment, the chain conveyor power system includes a servo motor, a transmission shaft and a chain conveyor, and the chain conveyor rotates around the bottom surface of the tunnel through the transmission shaft; the output end of the servo motor is connected to a planetary reducer for reducing the output power of the motor, and the planetary reducer is connected to the transmission shaft, and the planetary reducer drives the transmission shaft to rotate to realize the rolling of the chain conveyor.

[0013] As a preferred embodiment, a chain seat and a bearing seat are provided on the platform, the bearing seat is used to support the transmission shaft, and the chain seat is used to support the chain conveyor belt on the bottom of the tunnel to prevent contact with the platform and cause failure of the transportation function.

[0014] As a preferred embodiment, the servo motor is connected to a motor control screen, which is located on a table.

[0015] As a preferred embodiment, a burning oil pan is placed on the chain conveyor belt as a fire source, which moves with the conveyor belt to achieve mobile control of the fire source.

[0016] As a preferred embodiment, smoke cakes are added into the oil pan to reproduce the spreading behavior of smoke generated by a mobile fire source inside and outside the tunnel body and the changes in thermodynamic parameters.

[0017] As a preferred embodiment, an observation window for observing the fire source in the tunnel is provided on one side of the tunnel body.

[0018] As a preference, the observation window is a detachable double-layered high-temperature resistant glass window.

[0019] As a preferred embodiment, there is an electric box under the table, and the electric box is connected to the motor control screen above the platform. Parameters are set through the motor control screen and corresponding signals are sent to the electric box.

[0020] As a preferred embodiment, a thermocouple array for measuring temperature is installed on the tunnel arc top.

[0021] Compared with the existing technology, the beneficial effects of the reduced-size tunnel fire test platform capable of real-time moving fire source of the present invention are as follows:

[0022] The present invention introduces a mechanical automation system and installs an intelligently regulated chain conveying system in the tunnel, which can accurately and quantitatively control the position of the fire source, realize real-time monitoring and adjustment of the mobile fire source, and will not interfere with the combustion environment of the fire source.

[0023] The intelligent chain conveyor power system used in the present invention has significant advantages. First, it can control the fire source to move in the tunnel at a constant speed. Second, the system also allows the fire source to stay at any position in the tunnel, which not only ensures that the fire source can stay still during the experiment, but also avoids the position deviation of the fire source caused by manual operation. In addition, the automated control of the intelligent chain conveyor power system greatly simplifies the experimental process, reduces manual intervention, and improves the authenticity of the experiment and the reliability of the data.

[0024] The detachable design of the present invention allows the observation window to be easily disassembled, cleaned or replaced, thereby ensuring a clear field of view during repeated experiments and avoiding observation errors caused by smoke pollution. Through the observation window and the exits on the left and right sides of the tunnel, the experimenters can clearly see the spread of smoke generated by the mobile fire source inside and outside the tunnel, making it easy to record the path, flow speed and spread pattern of the smoke diffusion. This multi-angle observation not only improves the monitoring capability of the fire source smoke, but also provides rich visual information and measured data for subsequent experimental data analysis. At the same time, combined with modern measuring equipment, the observation window can also be used to monitor changes in fuel quality in the tunnel, further providing accurate data support for tunnel fire research. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Figure 1 It is a front view of a reduced-size tunnel fire test bench capable of real-time moving fire source according to an embodiment of the present invention;

[0027] Figure 2 A front plan view of a reduced-size tunnel fire test bench capable of real-time moving fire sources according to an embodiment of the present invention;

[0028] Figure 3 A side view of a reduced-size tunnel fire test bench capable of real-time moving fire sources according to an embodiment of the present invention;

[0029] In the figure, 1-table, 11-electric box, 2-platform, 21-chain seat, 22-spherical bearing seat, 3-tunnel body, 31-tunnel wall, 32-tunnel bottom, 33-tunnel arc top, 34-observation window, 4-table body bracket, 5-chain conveyor power system, 51-transmission shaft, 52-chain conveyor, 53-servo motor, 54-planetary reducer, 6-motor control screen. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] The present invention provides a reduced-size tunnel fire test platform capable of moving a fire source in real time. To make the purpose, technical solution and effect of the present invention clearer and more specific, the following further describes the use of the present invention in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1 to Figure 3 As shown, a reduced-size tunnel fire test platform capable of moving a fire source in real time in this embodiment comprises a table 1, a platform 2 is arranged above the table 1, a tunnel body 3 is arranged on the platform 2, the tunnel body 3 comprises a tunnel bottom surface 32, tunnel walls 31 located on both sides of the tunnel bottom surface 32, and a tunnel arc top 33, a chain conveyor belt power system 5 for transporting a fire source is arranged inside the tunnel body 3, the chain conveyor belt power system 5 comprises a servo motor 53, a planetary reducer 54, a transmission shaft 51 and a chain conveyor belt 52, and the chain conveyor belt 52 rotates around the tunnel bottom surface 32 through the transmission shaft 51. A chain seat 21 and a spherical bearing seat 22 are arranged on the platform 2, the spherical bearing seat 22 is used to support the transmission shaft 51, and the chain seat 21 is used to support the chain conveyor belt 52 on the tunnel bottom surface 32 to prevent contact with the platform 2, resulting in failure of the transportation function.

[0033] like Figure 2As shown, the output end of the servo motor 53 is connected to a planetary reducer 54 for reducing the output power of the motor, and the planetary reducer 54 is connected to the transmission shaft 51. The planetary reducer 54 drives the transmission shaft 51 to rotate to realize the rolling of the chain conveyor 52. The servo motor 53 is connected to the motor control screen 6. There is an electric box 11 under the table 1. The electric box 11 is connected to the motor control screen 6 above the platform. Parameters such as speed and distance are set through the motor control screen, and the corresponding signals are sent to the electric box 11.

[0034] A burning oil pan is placed on the chain conveyor 52 as a fire source, which moves with the conveyor to achieve mobile control of the fire source, and smoke cakes are added to the oil pan to reproduce the spreading behavior and thermodynamic parameter changes of smoke generated by the mobile fire source inside and outside the tunnel body 3. Through this mechanical automation method, the present invention effectively overcomes the problems of complex operation, many interference factors, and large errors in traditional methods, not only improving the experimental efficiency, but also enhancing the accuracy and controllability of experimental data, providing more stable and reliable technical support for tunnel fire experiments.

[0035] By adding fuel to the oil pan and igniting it, the fire source in the tunnel fire is simulated. The oil pan is placed on the chain conveyor 52 for transportation, and the oil pan is allowed to enter the tunnel body 3 along the chain conveyor 52 to simulate the mobile fire source in the tunnel fire. The movement speed and movement distance of the fire source in the tunnel 2 are changed by adjusting the motion parameters in the motor control screen 6. In contrast, the traditional implementation method of the mobile fire source based on the traction rope or manual long rod push has a large operation error, and it is difficult to ensure that the fire source moves stably and accurately to the target position. The intelligent chain conveyor power system adopted by the present invention can control the movement of the fire source in the tunnel at a constant speed. The system also allows the fire source to stay at any position in the tunnel, which not only ensures that the fire source can be stationary during the experiment, but also avoids the deviation of the fire source position caused by manual operation. In addition, the automated control of the intelligent chain conveyor power system greatly simplifies the experimental process, reduces manual intervention, and improves the authenticity of the experiment and the reliability of the data.

[0036] As an embodiment, in a reduced-size tunnel fire test bench capable of real-time mobile fire sources, an observation window 34 equipped with replaceable double-layer high-temperature resistant glass for observing the fire source conditions in the tunnel is provided on one side of the tunnel body 3. By designing a glass observation window on one side of the tunnel, the structure adopts a detachable design, and the glass can be disassembled for cleaning or replacement at any time during the experimental preparation stage. Such a design can reduce the pollution of smoke and dust on the observation window glass, and avoid the influence of smoke and dust accumulation on the experimental observation effect of the traditional fixed observation window during long-term experiments. Since the experiment usually needs to be repeated many times, in order to ensure that the observation window always remains clear,

[0037] The shape of the flame in the tunnel is observed through the transparent observation window 34, and the temperature is measured by the thermocouple array installed on the tunnel arc top 33 to analyze the fire development trend in the tunnel. By using a reduced-scale model, the human and material resources consumption of conducting full-scale experiments is avoided, and the cost required for studying related issues is reduced.

[0038] As an embodiment, fuel is added to an oil pan and ignited, and smoke cakes are placed in the oil pan to simulate smoke generated by a tunnel fire. The oil pan is placed on a chain conveyor 52 for transportation, and the oil pan is allowed to enter the tunnel body 3 along the chain conveyor 52 to simulate a mobile fire source in a tunnel fire.

[0039] The movement state of the oil pan in the tunnel body 3 is changed by adjusting the movement parameters in the motor control screen 6. The smoke spreading behavior inside and outside the tunnel is observed through the transparent observation window 34 and the outlets on both sides of the tunnel body 3, and the changes in thermodynamic parameters are measured to analyze the smoke generation and spreading trend of the tunnel fire.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A reduced-size tunnel fire test bench capable of real-time moving fire source, characterized in that: The invention comprises a table (1), a platform (2) is arranged above the table (1), a tunnel body (3) is arranged on the platform (2), the tunnel body (3) comprises a tunnel bottom surface (32), tunnel walls (31) located on both sides of the tunnel bottom surface (32), and a tunnel arc top (33), and a chain conveyor belt power system (5) for transporting a fire source is arranged inside the tunnel body (3).

2. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 1 is characterized in that: The chain conveyor belt power system (5) comprises a servo motor (53), a transmission shaft (51) and a chain conveyor belt (52); the chain conveyor belt (52) rotates around the tunnel bottom surface (32) via the transmission shaft (51); the output end of the servo motor (53) is connected to a planetary reducer (54) for reducing the output power of the motor; the planetary reducer (54) is connected to the transmission shaft (51); the planetary reducer (54) drives the transmission shaft (51) to rotate to realize the rolling of the chain conveyor belt (52).

3. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 2 is characterized in that: The platform (2) is provided with a chain seat (21) and a bearing seat (22), wherein the bearing seat (22) is used to support the transmission shaft (51), and the chain seat (21) is used to support the chain conveyor belt (52) on the bottom surface (32) of the tunnel to prevent contact with the platform (2) and thus failure of the transport function.

4. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 2 is characterized in that: The servo motor (53) is connected to a motor control screen (6), which is located on the table (1).

5. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 2 is characterized in that: A burning oil pan is placed on the chain conveyor belt (52) as a fire source, which moves with the conveyor belt to achieve mobile control of the fire source.

6. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 5 is characterized in that: Smoke cakes are added to the oil pan to reproduce the spreading behavior of smoke generated by a mobile fire source inside and outside the tunnel body (3) and the changes in thermodynamic parameters.

7. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 1 is characterized in that: An observation window (34) for observing the fire source situation in the tunnel is arranged on one side of the tunnel body (3).

8. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 7 is characterized in that: The observation window (34) is a detachable double-layer high-temperature resistant glass window.

9. The reduced-size tunnel fire test platform capable of real-time moving fire source according to claim 3 is characterized in that: An electric box (11) is provided below the table (1), and the electric box (11) is connected to a motor control screen (6) above the platform (2). Parameters are set through the motor control screen, and corresponding signals are sent to the electric box (11).

10. A reduced-size tunnel fire test platform capable of real-time moving fire source according to any one of claims 1 to 9, characterized in that: A thermocouple array for measuring temperature is installed on the tunnel arc top (33).

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