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Multifunctional urban traffic tunnel fire disaster fume diffusion model device

A technology for urban traffic and smoke diffusion, which is applied in safety devices, fire prevention, ventilation of mines/tunnels, etc. It can solve the problem of multiple entrances and exits and the complex structure of super-long tunnel models, the tunnel slope cannot be changed from multiple angles, and it is difficult to observe smoke easily. Air movement and other issues, to achieve the effect of simple structure, low installation cost, and large experimental range

Inactive Publication Date: 2012-06-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention provides a convenient and flexible tunnel fire smoke movement model, which overcomes the difficulty of observing the smoke movement in the existing tunnel model, the inability to change the slope of the tunnel from multiple angles, the difficulty of water spraying, the difficulty of describing multiple entrances and exits, and the super-long tunnel The defects of the complex structure of the model provide a comprehensive, convenient and flexible scale experimental model of small-scale urban traffic tunnels, which can study the impact of tunnel slope, multiple entrances and exits, and water sprinkler systems on tunnel fires

Method used

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  • Multifunctional urban traffic tunnel fire disaster fume diffusion model device
  • Multifunctional urban traffic tunnel fire disaster fume diffusion model device
  • Multifunctional urban traffic tunnel fire disaster fume diffusion model device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 - Simulating the influence of slope on fire smoke movement and critical wind speed

[0047] Preliminary preparation, check whether all components of the fire model system are operating normally. Adjust the model tunnel system to achieve the set fire scene, and simulate the fire conditions of single-exit traffic tunnels. The fire scale is set as a small fire scale. When doing a tunnel fire experiment, one end of the support rod 7 is connected to the arched main tunnel 5 through the tunnel rotating hinge 3, and the other end is connected to the base 8, while the screw at the upper end of the jack 11 is connected to the steel frame structure 12 The screw buckles at the lower end are connected, and the slope of the tunnel is adjusted by adjusting the height of the jack 11. Adjust the slope of the tunnel to 0°, 3°, 5°, 10°, and 15° respectively. Frequency conversion fans are used to change the wind speed of tunnel longitudinal ventilation.

[0048] In the experi...

Embodiment 2

[0049] Example 2 - Simulating the influence of multiple entrances and exits on smoke movement in a tunnel fire

[0050] After the preparatory work for the experiment is completed, in order to simulate the multi-entrance tunnel fire experiment, the branch tunnel 23 prepared in advance is flanged to the main tunnel 5 through the branch tunnel connection port 20 . In this experiment, the smoke movement at different fire source locations was simulated, the fire scale was set as a small fire scale, the tunnel slope was 0°, and the ventilation wind speed was 0m / s. The first group of fire sources is placed in the middle of the tunnel, between the openings of the two branch tunnels. The second group of fire sources is located in the middle between the entrance of the tunnel and the entrance of the first branch tunnel. The third group of fire sources is located in the middle of the exit of the tunnel and the entrance of the second branch tunnel. The obtained experimental data is comp...

Embodiment 3

[0051] Example 3 - Effect of Simulated Water Sprinkler System on Smoke Diffusion and Fire Control in Tunnel Fire

[0052]According to the preparations before the experiment described in Case 1, the water sprinkler head 19 is connected to the water sprinkler nozzle arrangement port 22 and the water sprinkler device is adjusted. The water output of the sprinkler system is regulated by the head pressure provided by the water pump. The water head pressure of the water pump is 0~0.1MP, which can realize fire extinguishing simulation for different fire source power. This experiment simulates the effect of water sprinkler system on fire smoke movement and fire control. The tunnel adopts a single entrance and exit tunnel, and the ventilation wind speed is 0m / s. The start time of water spray lags behind the fire source stabilization time by 10s, which is determined by experimental observation. It is divided into three groups of working conditions. In the first group of working condi...

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Abstract

The invention discloses a multifunctional urban traffic tunnel fire disaster fume diffusion model experimental device which consists of a frequency conversion fan, an arch main tunnel, a branch tunnel, a fume discharge flue, a fire source mobile car, a gradient regulating device and a water sprinkler system; the frequency conversion fan is connected with the front end of the arch main tunnel through a blind plate; the fume discharge flue is connected with the rear end of the arch main tunnel; one end of the main tunnel is fixed on a support frame, and the other end of the main tunnel is supported by a lifting jack so that the gradient of the main tunnel can be adjusted; the mobile car equipped with a combustion cell can slide in the tunnel, thereby changing the position of the fire source; corresponding water spraying quantity can be provided for fire disasters with different fire source powers through controlling the water spraying; when a multiple-passageway tunnel fire disaster experiment is carried out, the branch tunnel and the main tunnel can be connected; and when a special longer tunnel fire disaster experiment is carried out, the arch main tunnel can be lengthened. The device not only can simulate the influences of different gradients, fire source powers, longitudinal ventilation wind speeds and water spraying on fume motion of tunnels, also can simulate multiple-passageway and special longer tunnel fire disasters and has a wide application scope; furthermore, the device is simple in structure, and is convenient to operate.

Description

technical field [0001] The invention designs a fire experiment device, in particular relates to a tunnel fire model experiment device with adjustable slope, adjustable length, multiple entrances and exits, and a water spray system for fire extinguishing. Background technique [0002] With the increasing scale of urban construction, urban traffic tunnels can effectively relieve traffic congestion as a three-dimensional traffic, so they are widely used. In Beijing, China's first ultra-large-scale comprehensive underground utility corridor and urban traffic tunnel comprehensive development and utilization system in Zhongguancun West District was put into trial operation, enabling the Zhongguancun area to realize three-dimensional traffic; compared with traffic tunnels in non-urban areas, urban traffic Tunnels have the following characteristics: 1) large traffic volume; 2) large buried depth, urban underground traffic tunnels are often buried deep, resulting in a large slope at ...

Claims

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Application Information

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IPC IPC(8): E21F1/02E21F5/02
Inventor 李炎锋刘晓阳赵明星李俊梅孙晓龙林欣欣
Owner BEIJING UNIV OF TECH
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