Segmented smoke exhaust system of long channel of deeply-buried subway station

Abstract

The utility model provides a segmented smoke exhaust system of a long channel of a deeply-buried subway station. The long channel at least comprises a first connecting channel communicated with a station hall, a second connecting channel communicated with an entrance and exit, and a building escalator channel clamped between the first connecting channel and the second connecting channel. The segmented smoke exhaust system comprises a first smoke exhaust assembly arranged in the first connecting channel, a second smoke exhaust assembly arranged in the second connecting channel and extending into the building escalator channel, and a first smoke blocking vertical wall arranged at the connection position of the building escalator channel and the first connecting channel. According to the utility model, the building space characteristics of the long channel at the entrance and exit of the subway are fully considered, the smoke is prevented from spreading to the upside of a stair section in stages by dividing a plurality of smoke-proof subareas and independently arranging mechanical smoke exhaust systems in stages, and a local safe area is formed to facilitate personnel evacuation; the fan type selection air quantity of a single smoke exhaust system is reduced, the size of an air pipe is reduced, and the reliability of smoke exhaust of a long channel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to a segmented smoke exhaust system for a long passage of a deeply buried subway station. Background Art

[0002] With the development of urban construction, the density of subway lines has gradually increased. In order to reduce the impact of underground stations on ground traffic and buildings, and also due to the large ups and downs of subway lines and the limited capacity of escalators, some subway lines have adopted deep burial, and underground stations are also deep buried stations. The escalator section of the entrance and exit passage of the deep buried station has a large lifting height, a long passage, a long total evacuation time, and great difficulty in smoke exhaust.

[0003] Disadvantages of traditional entrance and exit channel smoke exhaust system: The traditional entrance and exit channel smoke exhaust system usually sets up a smoke exhaust room in the station hall or next to the underground passage, and regards the entire entrance and exit channel as a smoke-proof partition, sets up a smoke exhaust system, and does not set up smoke control measures such as smoke barriers in the middle of the channel. The smoke exhaust outlet is basically evenly arranged from the mouth close to the public area of ​​the station hall, and is exhausted to the outside through the smoke exhaust duct and the smoke exhaust fan. Due to the large vertical lifting height of the escalator section of the deep-buried station building, the upward spread of smoke is more significant, posing a certain threat to the safe evacuation of personnel. The super-long entrance and exit channel with a length of more than 100m has a large smoke-proof partition area, a large calculated smoke exhaust volume, a large air volume of the smoke exhaust fan equipment selection, and a large size of the smoke exhaust duct. The air duct route is too long, and the channel close to the deep-buried station hall is often at the end of the smoke exhaust system, which is prone to insufficient smoke exhaust power, and cannot quickly remove smoke, and the evacuated personnel are easily affected by smoke.

[0004] A smoke barrier wall is a smoke barrier separation facility installed under the ceiling, beams or suspended ceiling of a building, which can form a certain smoke storage space in the event of a fire. Its main function is to block the lateral diffusion of smoke under the ceiling, beams or suspended ceiling of a building in the event of a fire, and confine it to a specific area so that the smoke can be discharged in time through the smoke exhaust facilities in the area. Utility Model Content

[0005] In view of the defects in the prior art, the utility model provides a segmented smoke exhaust system for a long passage of a deeply buried subway station, which solves the technical problems of the existing entrance and exit passage smoke exhaust system, such as the large calculated air volume, which increases the equipment selection air volume, the large size of the smoke exhaust duct, the too long air duct route, the insufficient power of the terminal smoke exhaust vent, the inability to quickly exhaust smoke, and the evacuation of personnel being easily affected by smoke.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A segmented smoke exhaust system for a long passage of a deeply buried subway station, the long passage of the station at least comprising a first connecting passage connected to the station hall, a second connecting passage connected to an entrance and exit, and an escalator passage whose two ends are respectively connected to the first connecting passage and the second connecting passage; the segmented smoke exhaust system comprises a first smoke exhaust component, a second smoke exhaust component and a first smoke barrier wall; the first smoke exhaust component is arranged in the first connecting passage to be used for exhausting smoke in the connecting passage to the ground surface; the second smoke exhaust component is arranged in the second connecting passage and extends to the escalator passage to be used for exhausting smoke in the second connecting passage and the escalator passage to the ground surface; the first smoke barrier wall is arranged at the junction of the escalator passage and the first connecting passage.

[0008] Optionally, the second smoke exhaust assembly includes a second machine room and a second smoke exhaust duct; the second machine room is arranged in the second connecting channel, and has a second smoke exhaust fan built therein; the second smoke exhaust duct is arranged in the second connecting channel and the escalator channel, and is connected to the second smoke exhaust fan.

[0009] Optionally, the escalator passage includes a first escalator section, a conversion platform and a second escalator section connected in sequence, and the first escalator section is connected to a first connecting channel, the middle part of the escalator passage is also connected to an auxiliary channel, and the auxiliary channel is connected to the conversion platform; the segmented smoke exhaust system also includes a third smoke exhaust component and a second smoke barrier wall; the third smoke exhaust component is arranged in the auxiliary channel and extends into the first escalator section; the second smoke barrier wall is arranged at the connection position between the second escalator section and the auxiliary channel.

[0010] Optionally, the first smoke barrier wall includes a fixed smoke barrier, a movable smoke barrier and a lifting assembly; the fixed smoke barrier is fixedly connected to the top of the channel; the movable smoke barrier is slidably connected to the fixed smoke barrier in a liftable manner; the lifting assembly is used to drive the movable smoke barrier to lift and lower to adjust the smoke blocking height of the first smoke barrier wall.

[0011] Optionally, the segmented smoke exhaust system also includes a smoke concentration detection module and a controller; the smoke concentration detection module is arranged at the bottom end of the movable smoke barrier and / or the side wall of the long passage of the station, so as to at least detect the smoke concentration at the lowest end of the movable smoke barrier in real time and transmit the detection result to the controller; the controller is electrically connected to the smoke concentration detection module and the lifting assembly, respectively, so as to at least receive the detection result and control the lifting action of the movable smoke barrier based on the detection result.

[0012] Optionally, the segmented smoke exhaust system also includes a power storage module, which is electrically connected to the station power grid, the smoke concentration detection module, the lifting assembly and the controller respectively, so as to store electrical energy when the station is powered on, and to supply power to the smoke concentration detection module, the lifting assembly and the controller when the station is powered off.

[0013] It can be seen from the above technical solution that the beneficial effects of the utility model are:

[0014] The utility model provides a segmented smoke exhaust system for a long passage of a deep-buried subway station, wherein the long passage at least includes a first connecting passage connected to the station hall and a second connecting passage connected to the entrance and exit, and an escalator passage whose two ends are respectively connected to the first connecting passage and the second connecting passage; the segmented smoke exhaust system includes a first smoke exhaust component arranged in the first connecting passage, and a second smoke exhaust component arranged in the second connecting passage and extending into the escalator passage, and a first smoke barrier vertical wall arranged at the connection position of the escalator passage and the first connecting passage. The utility model fully considers the architectural space characteristics of the long passage of the subway entrance and exit, divides into multiple smoke-proof partitions, and independently sets up a mechanical smoke exhaust system in sections, and blocks the spread of smoke to the top of the staircase in stages, forming a local safety area that is conducive to the evacuation of personnel; reduces the fan selection air volume of a single smoke exhaust system, reduces the size of the air duct, and improves the reliability of smoke exhaust in the long passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 It is a cross-sectional view of a long passage of a deeply buried subway station;

[0017] Figure 2 This is a layout diagram of a segmented smoke exhaust system for a long passageway in a deep-buried subway station;

[0018] Reference numerals:

[0019] 1-first connecting passage, 2-escalator passage, 3-second connecting passage, 4-auxiliary passage, 5-first smoke exhaust assembly, 6-second smoke exhaust assembly, 7-third smoke exhaust assembly, 8-first smoke barrier wall, 9-second smoke barrier wall;

[0020] 21-first floor escalator section, 22-second floor escalator section, 23-transfer platform. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0022] See also Figure 1The utility model provides a segmented smoke exhaust system for a long passage deep in a subway station, which fully considers the architectural space characteristics of the long passage at the subway entrance and exit. Figure 1 , the long passage at least includes a first connecting passage 1 connected to the station hall and a second connecting passage 3 connected to the entrance and exit, and an escalator passage 2 whose two ends are connected to the first connecting passage 1 and the second connecting passage 3 respectively. Based on the characteristics of the building space, the segmented smoke exhaust system designed in this application includes a first smoke exhaust component 5 arranged in the first connecting passage 1, and a second smoke exhaust component 6 arranged in the second connecting passage 3 and extending into the escalator passage 2, and a first smoke barrier wall 8 arranged at the connection position between the escalator passage 2 and the first connecting passage 1. Considering that smoke has the characteristic of actively spreading upward, it is obvious that a smoke barrier wall is set in the escalator passage 2. Since the escalator passage 2 extends upward at an angle, its spatial structure will result in the smoke barrier effect of the smoke barrier wall being not ideal. Therefore, this application only sets the first smoke barrier wall 8 at the starting point of the inclined section of the escalator to block the upward spread of smoke in sections, forming a local safety area to facilitate the evacuation of personnel.

[0023] Specifically, each set of smoke exhaust components is equipped with a dedicated smoke exhaust fan room and smoke exhaust shaft. In particular, for the second smoke exhaust component 6, since it undertakes the smoke exhaust tasks of the second connecting channel 3 and the escalator channel 2 at the same time, if smoke appears in the escalator channel 2, it will actively spread upward to the second connecting channel 3. In order to fully utilize the smoke exhaust power of the second smoke exhaust fan, the smoke exhaust fan room and smoke exhaust shaft of the second smoke exhaust component 6 are both set in the second connecting channel 3, and the number of smoke exhaust ports of the smoke exhaust pipe located in the second connecting channel 3 is increased to increase the density of smoke exhaust ports in the straight section of the long channel of the station, and to quickly and centrally exhaust smoke.

[0024] In order to further ensure the safety of personnel evacuation, when building a long passage in a subway station, a safety exit is usually added in the middle of the long passage, such as Figure 1-2 As shown, the escalator passage 2 includes a first escalator section 21, a transfer platform 23 and a second escalator section 22 connected in sequence, and the first escalator section 21 is connected to the first connecting passage 1, and the middle of the escalator passage 2 is also connected to an auxiliary passage 4, and the auxiliary passage 4 is connected to the transfer platform 23, and the other end of the auxiliary passage 4 is a safety exit. Then the segmented smoke exhaust system also includes a third smoke exhaust component 7 arranged in the auxiliary passage 4 and extending into the first escalator section 21, and a second smoke barrier wall 9 arranged at the connection position between the second escalator section 22 and the auxiliary passage 4 and having the same structure as the first smoke barrier wall 8, then the smoke exhaust duct of the second smoke exhaust component 6 only needs to be arranged close to the second smoke barrier wall 9.

[0025] In the above scheme, the long passage of the station is divided into multiple smoke-proof partitions by setting up smoke-proof vertical walls, and a set of smoke exhaust components is separately set in each partition. In specific use, when fire smoke is generated in a certain smoke-proof partition, the corresponding smoke exhaust component of the partition is activated to enter the independent smoke exhaust mode. However, if the smoke-proof partition is overloaded by the fan, power outage, etc., the smoke in the smoke-proof partition will continue to accumulate, so that the smoke will spread to the next adjacent smoke-proof partition through the lower edge of the smoke-proof vertical wall, thereby forcing the smoke exhaust component in the next adjacent smoke-proof partition to be activated and enter the linkage smoke exhaust mode. In order to ensure fast and effective smoke exhaust, the present application has also made further improvements to the above scheme, namely: the first smoke-proof vertical wall 8 includes a fixed smoke barrier, a movable smoke barrier and a lifting component; the fixed smoke barrier is fixedly connected to the top of the passage; the movable smoke barrier is slidably connected to the fixed smoke barrier in a liftable manner; the lifting component is used to drive the movable smoke barrier to lift and lower to adjust the smoke barrier height of the first smoke-proof vertical wall 8. The smoke barrier is designed as a partially liftable structure. Compared with some completely hidden or roller-type smoke barriers on the market, even if the movable smoke barrier loses the ability to rise and fall due to power outages, its own failures, etc., the fixed smoke barrier still retains a certain smoke blocking ability.

[0026] Under normal circumstances, the movable smoke barrier is lowered to the lowest position so that the smoke barrier wall reaches the maximum smoke barrier height allowed by relevant industry standards, so that smoke-proof partitions are formed on both sides of the smoke barrier wall; when the smoke spreads to near the lowest position of the movable smoke barrier, it means that it is difficult to complete rapid and effective smoke exhaust relying solely on the smoke exhaust components in the smoke generation area. At this time, the movable smoke barrier is controlled to rise to the highest position to reduce the smoke barrier height so that the smoke can enter the next adjacent smoke-proof partition more quickly, thereby allowing the two adjacent smoke exhaust components to enter the linkage smoke exhaust mode; if the smoke accumulation height continues to decrease in the linkage smoke exhaust mode, and the smoke no longer overflows from the bottom edge of the smoke barrier wall, this situation most likely indicates that the fire is under control, the smoke generation rate is reduced or no new smoke is generated, then the movable smoke barrier can be lowered to the lowest position again, the linkage smoke exhaust mode is released, and after the residual smoke in the next adjacent smoke-proof partition is exhausted, the corresponding smoke exhaust component can stop working, thereby achieving effective utilization of resources.

[0027] As a further improvement to the above scheme, the segmented smoke exhaust system also includes a smoke concentration detection module and a controller; the smoke concentration detection module is arranged at the bottom of the movable smoke barrier and / or the side wall of the long passage of the station, so as to at least detect the smoke concentration at the lowest end of the movable smoke barrier in real time and transmit the detection result to the controller; the controller is electrically connected to the smoke concentration detection module and the lifting component respectively, so as to at least receive the detection result and control the lifting action of the movable smoke barrier based on the detection result. Wherein, whether it is an independent smoke exhaust mode or a linkage smoke exhaust mode, the start and stop timing of each smoke exhaust component is determined by its own control system without referring to the detection result of the smoke concentration detection module. Preferably, in order to avoid the failure of the smoke concentration detection module, the lifting component and the controller due to power failure of the station, a power storage module is also provided in the smoke barrier vertical wall, which is electrically connected to the station power grid, the smoke concentration detection module, the lifting component and the controller respectively, so as to store electric energy when the station is powered on, and to supply power to the smoke concentration detection module, the lifting component and the controller when the station is powered off. As for the power supply guarantee of smoke exhaust components, fire power supply and fire FAS system control are generally adopted.

[0028] In one embodiment, the smoke concentration detection module is arranged on the side wall of the long passage of the station, specifically, it is arranged on the side of the vertical smoke barrier wall, and its setting height is level with the lower limit position of the movable smoke barrier. When it detects that the smoke concentration is greater than the set value, the controller determines that the independent smoke exhaust mode is invalid and controls the movable smoke barrier to rise, and the smoke control system enters the linked smoke exhaust mode; after entering the linked smoke exhaust mode for a predetermined period of time, if the smoke concentration is less than the set value, the controller controls the movable smoke barrier to descend and reset.

[0029] In another embodiment, the smoke concentration detection module is arranged at the bottom of the movable smoke baffle. When a fire occurs, the height position of the smoke concentration detection module is changed by moving the movable smoke baffle downward, so that the smoke accumulation situation can be judged. Specifically, the lowering of the movable smoke baffle to the lower limit position is regarded as the first detection position of the smoke concentration detection module, and the raising of the movable smoke baffle to the upper limit position is regarded as the second detection position of the smoke concentration detection module; the smoke accumulation situation can refer to the following judgment mechanism: when the detection result of the first detection position is less than the set value, it indicates that the amount of smoke accumulation at the smoke baffle wall is still within the controllable range, and only a single smoke exhaust component can be used; when the detection result of the first detection position is greater than the set value, it indicates that the amount of smoke accumulation at the smoke baffle wall is too large, and it is no longer reliable to rely solely on the smoke exhaust component in the fire area, so the movable smoke baffle is controlled to rise to allow the smoke to spread to the other side of the smoke baffle wall, and the control system of the adjacent smoke exhaust component is activated after sensing the smoke to speed up the extraction of smoke; when the detection result of the second detection position is less than the set value, the controller controls the movable smoke baffle to descend and reset.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A segmented smoke exhaust system for a long passage of a deeply buried subway station, the long passage of the station comprising at least a first connecting passage (1) connected to the station hall, a second connecting passage (3) connected to an entrance and exit, and an escalator passage (2) having two ends respectively connected to the first connecting passage (1) and the second connecting passage (3); characterized in that: The segmented smoke exhaust system comprises: A first smoke exhaust component (5) is arranged in the first connecting channel (1) and is used to exhaust smoke in the connecting channel to the ground surface; A second smoke exhaust assembly (6) is arranged in the second connecting passage (3) and extends into the escalator passage (2), so as to be used for exhausting smoke in the second connecting passage (3) and the escalator passage (2) to the ground surface; The first smoke barrier vertical wall (8) is arranged at the connection position between the escalator passage (2) and the first connecting passage (1).

2. The segmented smoke exhaust system for a long passage of a deep-buried subway station according to claim 1 is characterized in that: The second smoke exhaust assembly comprises: A second machine room, arranged in the second connecting passage (3), and having a second smoke exhaust fan built therein; The second smoke exhaust duct is arranged in the second connecting passage (3) and the escalator passage (2), and is connected to the second smoke exhaust fan.

3. The segmented smoke exhaust system for a long passage of a deep-buried subway station according to claim 1 is characterized in that: The escalator passage (2) comprises a first escalator section (21), a transfer platform (23) and a second escalator section (22) which are connected in sequence, and the first escalator section (21) is connected to the first connecting passage (1), and the middle of the escalator passage (2) is also connected to an auxiliary passage (4), and the auxiliary passage (4) is connected to the transfer platform (23); characterized in that the segmented smoke exhaust system also includes: A third smoke exhaust assembly (7) is arranged in the auxiliary passage (4) and extends into the first floor escalator section (21); The second smoke barrier vertical wall (9) is arranged at the connection position between the second floor escalator section (22) and the auxiliary passage (4).

4. A segmented smoke exhaust system for a long passage of a deep-buried subway station according to claim 1 or 3, characterized in that: The first smoke barrier vertical wall (8) comprises: The smoke baffle is fixedly connected to the top of the passage; The movable smoke shield is slidably connected to the fixed smoke shield in a liftable manner; A lifting component is used to drive the movable smoke shield to lift and lower so as to adjust the smoke shielding height of the first smoke shielding vertical wall (8).

5. The segmented smoke exhaust system for a long passage of a deep-buried subway station according to claim 4 is characterized in that: The segmented smoke exhaust system also includes: A smoke concentration detection module is arranged at the bottom of the movable smoke shield and / or the side wall of the long passage of the station, so as to at least detect the smoke concentration at the lowest end of the movable smoke shield in real time and transmit the detection result to the controller; The controller is electrically connected to the smoke concentration detection module and the lifting assembly respectively, so as to at least receive the detection result and control the lifting action of the movable smoke baffle based on the detection result.

6. The segmented smoke exhaust system for a long passage of a deep-buried subway station according to claim 5 is characterized in that: The segmented smoke exhaust system also includes: The power storage module is electrically connected to the station power grid, the smoke concentration detection module, the lifting assembly and the controller respectively, so as to store electric energy when the station is powered on, and to supply power to the smoke concentration detection module, the lifting assembly and the controller when the station is powered off.

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