CN216157699U - Tunnel positive hole smoke prevention structure of tunnel portal emergency rescue station - Google Patents
Tunnel positive hole smoke prevention structure of tunnel portal emergency rescue station Download PDFInfo
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- CN216157699U CN216157699U CN202122109914.XU CN202122109914U CN216157699U CN 216157699 U CN216157699 U CN 216157699U CN 202122109914 U CN202122109914 U CN 202122109914U CN 216157699 U CN216157699 U CN 216157699U
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Abstract
The utility model relates to the technical field of tunnel disaster prevention and ventilation, in particular to a tunnel main tunnel smoke prevention structure of a tunnel portal emergency rescue station, which comprises a blowing-in air duct, an evacuation channel and a tunnel fan, wherein the blowing-in air duct is arranged at the upper part of the tunnel main tunnel smoke prevention structure; the emergency rescue station comprises two opening sections at two ends and an open line section between the two opening sections; both sides of the tunnel main tunnel of the tunnel opening section are provided with a blowing-in air channel and an evacuation channel, the blowing-in air channel is positioned at one side of the evacuation channel close to the exposed section, and a tunnel fan is arranged in the blowing-in air channel; one end of the blowing-in type air channel is provided with an air supply outlet and is connected with the tunnel main hole, and the included angle between one side of the blowing-in type air channel, which deviates from the bright line segment, and the tunnel main hole is an acute angle. According to the utility model, the blow-in type air channels are arranged on the two sides of the tunnel main tunnel at the two ends of the emergency rescue station, so that the ventilation air speed in the tunnel is not less than 1.5-2.0 m/s, the smoke is effectively prevented from invading into the tunnel, and personnel can safely escape from the evacuation channel.
Description
Technical Field
The utility model belongs to the technical field of tunnel disaster prevention and ventilation, and particularly relates to a tunnel main tunnel smoke prevention structure of a tunnel portal emergency rescue station.
Background
Along with the development of social economy, the updating of technology and the requirement of actual operation, the railway tunnel is rapidly developing towards the direction of growth and complexity, along with the difficulty of tunnel disaster prevention and rescue, the train fire disaster causes the tunnel to be temporarily closed and maintained, and the group death and group damage and the disastrous loss are serious. The design code of railway tunnel disaster prevention evacuation rescue engineering TB 10020 stipulates: emergency rescue stations are arranged in tunnels or tunnel groups with the length of 20km or more; and for the tunnel portal emergency rescue station, when the length of the wire section is less than 250m, a disaster prevention ventilation system is preferably arranged; the ventilation speed in the tunnels at two ends of the tunnel portal emergency rescue station is not less than 1.5-2 m/s.
The existing tunnel and the tunnel being built are mostly in a double-line form, the tunnel portal emergency rescue station is often combined with environmental conditions, auxiliary tunnel conditions and the like, tunnel fans are arranged in tunnels, air is blown in through air channels to meet the requirement of ventilation air speed in tunnels at two ends of the rescue station, and the air supply form is often unilateral air supply.
For unilateral air supply, if a train on fire stops at a line close to one side of an air supply outlet, the air supply airflow flow path can be blocked, airflow flow is seriously hindered, a large amount of energy loss is caused after the air supply airflow collides with the wall surface of a tunnel main tunnel or the train carriage body, the ventilation wind speed in tunnels at two ends of a rescue station can not meet the requirement, smoke is easy to enter the tunnels, and personnel safety evacuation is greatly influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a tunnel main tunnel smoke-proof structure of an emergency rescue station at a tunnel portal, which can effectively prevent smoke from invading into a tunnel when a train stops at the emergency rescue station and people need to be evacuated, so that the people can safely escape from an evacuation channel.
In order to achieve the purpose, the technical scheme of the utility model is a tunnel main hole smoke prevention structure of a tunnel entrance emergency rescue station, which comprises a blowing-in type air channel, an evacuation channel and a tunnel fan; the emergency rescue station comprises two opening sections at two ends and an open line section between the two opening sections; both sides of the tunnel main tunnel of the tunnel opening section are provided with a blowing-in air channel and an evacuation channel, the blowing-in air channel is positioned at one side of the evacuation channel close to the bright line section, and a tunnel fan is arranged in the blowing-in air channel; and one end of the blowing-in type air channel is provided with an air supply outlet and is connected with the tunnel main tunnel, and an included angle between one side of the blowing-in type air channel, which deviates from the bright line segment, and the tunnel main tunnel is an acute angle.
Furthermore, one end of the evacuation channel is connected with the tunnel main hole, and the other end of the evacuation channel is bent to extend towards the direction of the bright line segment.
Further, the other end of the blow-in type air duct is connected with the evacuation channel.
Furthermore, the section of one end of the blowing-in type air duct, which is provided with the air supply outlet, is a tapered section.
Further, the distance between the tunnel fan and the connection position of the blowing-in air duct and the tunnel main hole is not less than 5 m.
Furthermore, a certain distance is reserved between intersection points of central lines of the blowing-in type air ducts on two sides of the tunnel main hole of the tunnel opening section and the central line of the tunnel main hole.
Further, the pitch is not less than 10 m.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the blowing-in type air channels are arranged on the two sides of the tunnel main tunnel at the two ends of the emergency rescue station, so that under the condition that a train on any line in the tunnel stops at the emergency rescue station in case of fire, the smoke-proof structure can ensure that the ventilation air speed in the tunnels at the two ends of the emergency rescue station is not less than 1.5-2.0 m/s, smoke can be effectively prevented from invading into the tunnel main tunnel, so that personnel can safely escape from the evacuation channel, and the safety performance of the emergency rescue station at the tunnel entrance is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a tunnel main tunnel smoke prevention structure of an emergency rescue station at a tunnel portal according to an embodiment of the present invention;
in the figure: 1. a tunnel main tunnel; 2. a blown-in air duct; 3. a tunnel fan; 4. an air supply outlet; 5. and evacuating the channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, an embodiment of the present invention provides a smoke-proof structure for a tunnel main tunnel of an emergency rescue station at a tunnel portal, including a blowing-in air duct 2, an evacuation channel 5 and a tunnel blower 3; the emergency rescue station comprises two opening sections at two ends and an open line section between the two opening sections; both sides of a tunnel main tunnel 1 of the tunnel opening section are provided with a blowing-in type air channel 2 and an evacuation channel 5, the blowing-in type air channel 2 is positioned at one side of the evacuation channel 5 close to the bright line section, and a tunnel fan 3 is arranged in the blowing-in type air channel 2; one end of the blowing-in type air channel 2 is provided with an air supply outlet 4 and is connected with the tunnel main tunnel 1, and an included angle between one side of the blowing-in type air channel 2 departing from the bright line segment and the tunnel main tunnel 1 is an acute angle. In the embodiment, the blowing-in type air channels are arranged on two sides of the tunnel opening sections at two ends of the emergency rescue station, and in two included angles between the blowing-in type air channels 2 and the tunnel main tunnel 1, an included angle departing from the main line section is an acute angle, so that wind entering the tunnel main tunnel 1 from the blowing-in type air channels 2 blows towards the main line section, airflow unidirectional flow is formed in the tunnel main tunnel 1, when a fire disaster happens to a train on any line in the tunnel and stops at the emergency rescue station, the ventilation air speed in the tunnels at two ends of the emergency rescue station can be guaranteed to be not less than 1.5-2.0 m/s, smoke can be effectively prevented from invading the main tunnel, personnel can safely escape from the evacuation channel, and the safety performance of the emergency rescue station at the extra-long railway tunnel opening is improved.
According to the embodiment, the auxiliary tunnel construction method can be used for combining the construction auxiliary tunnels on the two sides of the exit/entrance of the tunnel according to environmental conditions, the blowing-in type air channels 2 are arranged on the two sides of the tunnel main tunnel at the two ends of the tunnel entrance emergency rescue station, and the tunnel fans 3 meeting the requirements of the air speed and the air volume of the tunnel entrance at the two ends of the emergency rescue station and overcoming the requirements of natural air pressure, on-way resistance and local resistance are arranged in the blowing-in type air channels 2.
Further, one end of the evacuation channel 5 is connected with the tunnel main hole 1, and the other end is bent and extends towards the direction of the bright line segment, so that people can escape through the evacuation channel. Further, the other end of the blowing-in type duct 2 is connected to the evacuation passage 5.
Further, the section of the end of the blowing-in type air duct 2 provided with the air supply outlet 4 is a tapered section. As shown in fig. 1, the blowing-in air duct 2 of the present embodiment is sequentially divided into a connection section, an equipment section and an air supply section, the connection section is used for being connected with an evacuation channel 5, a tunnel fan 3 is installed in the equipment section, the air supply section is connected with a tunnel main tunnel 1, and the section of the air supply section adopts a tapered section to increase the air volume in the direction of the tunnel opening. The area of an air supply port 4 of the air supply section, which is used for being connected with the tunnel main tunnel 1, is determined by calculation so as to ensure that the ventilation air speed in the tunnels at two ends of the emergency rescue station is not less than 1.5-2.0 m/s.
Further, the distance between the tunnel fan 3 and the connection position of the blow-in air duct 2 and the tunnel main tunnel 1 is not less than 5 m. In this embodiment, the installation center of the tunnel fan 3 is at a certain distance from the connection between the blowing-in air duct 2 and the tunnel main tunnel 1, so that the air sent by the tunnel fan 3 passes through the air supply section and then enters the tunnel main tunnel 1, thereby improving the ventilation speed in the tunnel. The model of the tunnel fan 3 is selected according to the length and the section size of the tunnel main tunnel and the configuration of an included angle between an air channel and the tunnel main tunnel, and the installation requirement of the tunnel fan 3 is met; the control bus of the tunnel fan 3 is connected to the control room, and the tunnel fan 3 can be remotely or locally started to supply air according to the situation.
Furthermore, a certain distance is reserved between intersection points of the central lines of the blowing-in type air ducts 2 on two sides of the tunnel main hole 1 of the tunnel opening section and the central line of the tunnel main hole 1. Further, the pitch is not less than 10 m. In the embodiment, the central lines of the two blow-in air ducts 2 in the same tunnel portal section of the emergency rescue station are respectively intersected with the central line of the tunnel main tunnel 1, and the distance between the two intersection points is usually not less than 10m, so that the energy loss when two air supply flows at the same side are mixed is reduced, and the ventilation air speed in the tunnels at the two ends of the emergency rescue station can be improved to the maximum under the condition of certain train fault positions, tunnel fan models, positions and the like.
The working process of the smoke protection structure provided by the embodiment is as follows:
the tunnel fan 3 that insufflates in formula wind channel 2 under normal conditions is in the closed condition, when the conflagration breaks out in the tunnel, the train that catches fire stops at emergency rescue station, opens the tunnel fan 3 that insufflates in formula wind channel 2 in long-range or on the spot, guarantees that the tunnel portal emergency rescue station ventilation wind speed in both ends tunnel is not less than 1.5~2.0m/s to blow to the bright line section by the hole in, in order to prevent that the flue gas from invading the tunnel positive hole 1, make personnel can be evacuated from evacuation passageway 5 smoothly.
The smoke-proof structure is particularly suitable for single-hole double-line tunnels or tunnel groups with the length of more than 20km and in the form of a cave mouth of an emergency rescue station, and blowing-in air ducts are arranged on two sides of the tunnels at two ends of the emergency rescue station, so that the requirement of effective ventilation and smoke discharge of any train line of the double-line can be met when the train line breaks down.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a tunnel portal emergency rescue station tunnel positive hole smoke protection structure which characterized in that: comprises a blowing-in type air duct, an evacuation channel and a tunnel fan; the emergency rescue station comprises two opening sections at two ends and an open line section between the two opening sections; both sides of the tunnel main tunnel of the tunnel opening section are provided with a blowing-in air channel and an evacuation channel, the blowing-in air channel is positioned at one side of the evacuation channel close to the bright line section, and a tunnel fan is arranged in the blowing-in air channel; and one end of the blowing-in type air channel is provided with an air supply outlet and is connected with the tunnel main tunnel, and an included angle between one side of the blowing-in type air channel, which deviates from the bright line segment, and the tunnel main tunnel is an acute angle.
2. The tunnel portal emergency rescue station tunnel main tunnel smoke prevention structure as claimed in claim 1, wherein: one end of the evacuation channel is connected with the tunnel main hole, and the other end of the evacuation channel is bent to extend towards the direction of the bright line segment.
3. The tunnel portal emergency rescue station tunnel main tunnel smoke prevention structure as claimed in claim 2, wherein: the other end of the blowing-in type air channel is connected with the evacuation channel.
4. The tunnel portal emergency rescue station tunnel main tunnel smoke prevention structure as claimed in claim 1, wherein: the section of the end of the blowing-in type air duct provided with the air supply outlet is a gradually-reduced section.
5. The tunnel portal emergency rescue station tunnel main tunnel smoke prevention structure as claimed in claim 1, wherein: and the distance between the tunnel fan and the connection part of the blowing-in air duct and the tunnel main tunnel is not less than 5 m.
6. The tunnel portal emergency rescue station tunnel main tunnel smoke prevention structure as claimed in claim 1, wherein: and a certain distance is reserved between intersection points of the central lines of the blowing-in type air ducts on the two sides of the tunnel main hole of the hole section and the central line of the tunnel main hole.
7. The tunnel portal emergency rescue station tunnel main tunnel smoke prevention structure of claim 6, wherein: the pitch is not less than 10 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122109914.XU CN216157699U (en) | 2021-09-02 | 2021-09-02 | Tunnel positive hole smoke prevention structure of tunnel portal emergency rescue station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122109914.XU CN216157699U (en) | 2021-09-02 | 2021-09-02 | Tunnel positive hole smoke prevention structure of tunnel portal emergency rescue station |
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| Publication Number | Publication Date |
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| CN216157699U true CN216157699U (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122109914.XU Active CN216157699U (en) | 2021-09-02 | 2021-09-02 | Tunnel positive hole smoke prevention structure of tunnel portal emergency rescue station |
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| CN (1) | CN216157699U (en) |
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2021
- 2021-09-02 CN CN202122109914.XU patent/CN216157699U/en active Active
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