Subway platform smoke exhausting method used with screen door system compatibly

A technology for subway platforms and screen doors, which is applied in earth cube drilling, ventilation of mines/tunnels, mining equipment, etc. It can solve problems such as large cross-sectional area of ​​smoke exhaust pipes, increased station construction costs, and poor sense of space in platform buildings.

Active Publication Date: 2014-04-02
SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One way to deal with it is to select the corresponding smoke exhaust fan and exhaust the smoke through the platform smoke exhaust pipe. In this way, the cross-sectional area of ​​the smoke exhaust pipe is large, and the height of the entire platform of the station needs to be increased, which increases the construction cost of the station.
The second method is to open the station screen door or the openable and closable air outlet of the screen door, and use the emergency fan or heat exhaust fan installed in the section to open it, and indirectly lead the smoke from the platform waiting area to the station section to be discharged, so that artificial The range of smoke diffusion is increased, and the opening of the screen door increases the risk of secondary disasters
The third method is to set the stairway in a manner similar to that of a closed stairwell to reduce the amount of smoke exhaust. This method makes the architectural space of the platform unfavorable

Method used

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  • Subway platform smoke exhausting method used with screen door system compatibly
  • Subway platform smoke exhausting method used with screen door system compatibly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment one: if figure 1 As shown, track 1 and track 5 are the tracks of the up and down subway, which are located on both sides of the platform waiting area 3 . Screen doors 12, 13 are located on both sides of the platform waiting area 3. The platform waiting area 3 is provided with a heat exhaust air pipe 2 and a heat exhaust air pipe 4 respectively above the track, and the two heat exhaust air pipes are respectively connected to the heat exhaust chamber 7 and the heat exhaust fan system located on one side of the platform waiting area. Air valves 8 and 9 are respectively provided at the joints of the exhaust heat pipes 2 and 4 with the heat discharge chamber 7 to control the working state of the exhaust heat pipes 2 and 4 . The heat exhausting chamber 7 has a centralized smoke exhaust outlet 6 on the side surface adjacent to the waiting platform area, that is, the opening of the centralized smoke exhaust outlet 6 leads to the platform waiting area 3 .

Embodiment 2

[0016] Embodiment two: if figure 2 As shown, the concentrated smoke exhaust port 6 is connected with a smoke exhaust pipe 10, and the joint between the smoke exhaust pipe 10 and the heat exhaust chamber 7 is provided with a damper 11, and the damper 11 controls the work of the smoke exhaust pipe 10 and the centralized exhaust vent 14. state.

[0017] In the above-mentioned embodiment, a branch pipe is led out from the existing heat exhaust fan system of the station and installed at the screen door end door near the station end of the heat exhaust fan, or a centralized smoke exhaust port is set on the wall adjacent to the heat exhaust chamber 7 and the platform waiting area. 6. Use the opening and closing of the damper to switch working conditions.

[0018] Under normal working conditions, the heat exhaust chamber 7 is used for the heat exhaust function. At this time, the air valves 8 and 9 are opened, and the heat exhaust chamber 7, its heat exhaust fans and the heat exhaust...

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PUM

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Abstract

The invention relates to ventilation and firefighting of rail transits, in particular to a subway platform smoke exhausting method used with a screen door system compatibly, which is characterized by including: arranging a smoke exhaust outlet on one side, adjacent to a waiting platform, of a heat removal chamber, connecting the smoke exhaust outlet with a control valve, closing the control valve between a heat removal air duct and the heat removal chamber when the platform is in fire, and then turning on the control valve of the smoke exhaust outlet to exhaust smoke by the aid of a heat removal fan system. The subway platform smoke exhausting method has the advantages that smoke of the platform in screen doors is exhausted by aid of the smoke exhaust outlet or smoke exhaust pipes, a smoke exhaust mode of combining the mode of exhausting smoke uniformly by the original exhaust pipes of the platform and the mode of exhausting smoke intensively by heat removal fans is formed on the platform to meet conventional requirement for smoke exhausting of the platform and meet the requirement for air speed of 1.5m / s at the stairway, affection onto scale of the platform is low, smoke can be limited within the waiting area of the platform, smoke diffusion scope is not expanded, and secondary hazards possibly caused by opening the screen doors are controlled.

Description

technical field [0001] The invention relates to rail transit ventilation and fire protection, in particular to a method for exhausting smoke from a subway platform which is also used by a screen door system. Background technique [0002] When a fire breaks out on the platform of an underground rail transit station, in addition to maintaining the normal 60m 3 / min.m 2 In addition, it is also necessary to maintain a downward wind speed of 1.5m / s at the stair mouth of the platform and the station hall, so that the smoke exhaust volume of the platform is changed from the conventional 8×104m 3 / h ~10 4 m 3 / h increased to 20×10 4 m 3 / h~30×10 4 m 3 / h. [0003] One treatment method is to select the corresponding smoke exhaust fan to exhaust the smoke through the platform smoke exhaust pipe. In this way, the cross-sectional area of ​​the smoke exhaust pipe is large, and the height of the entire platform of the station needs to be increased, which increases the construction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F1/08
Inventor 郑晋丽阎正才瞿立张文斌
Owner SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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