A tunnel ventilation and smoke exhaust system

Abstract

An embodiment of the present application provides a tunnel ventilation and smoke exhaust system, which includes a plurality of air duct relay devices, and each of the air duct relay devices is arranged at intervals in the air duct of the tunnel; the air duct relay device can be flipped, and the flipping positions include covering the space enclosed by the air duct and avoiding the space enclosed by the air duct. The air duct relay device is used to keep covering the space enclosed by the air duct and provide positive pressure power in sections during a fire; the top of the cross-section of the air duct relay device is an arched structure, which matches the inner wall of the air duct. The air duct partition groove of the present application enables the air duct relay device to flip into the air duct partition groove when in a fault state or needs to be shut down, and just fits into the air duct partition groove, without occupying the air duct area during the operation of the air duct ventilation and smoke exhaust system; the top of the cross-section of the air duct relay device is an arched structure, which solves the technical barrier of applying the air duct relay device in the fixed-point ventilation / smoke exhaust system of the arched-section tunnel.

Description

Technical Field

[0001] This application relates to the technical field of tunnel ventilation / smoke exhaust, and specifically relates to a tunnel ventilation and smoke exhaust system. Background Art

[0002] As a relatively enclosed and narrow space, when vehicles are driving normally in a tunnel, they will emit waste gas and soot, which will mix with the surrounding air, causing air pollution in the tunnel and affecting the physical health of drivers and passengers. At the same time, once a fire breaks out in the tunnel, it will seriously threaten the life and property safety of drivers and passengers. Therefore, the requirements for tunnel operation ventilation and smoke prevention and exhaust design are very strict. By installing ventilation equipment in the tunnel and using fresh air to dilute and discharge harmful gases and soot in the tunnel, a relatively safe and comfortable driving environment can be provided. In recent years, with the improvement of urban economic levels and tunnel construction technologies, a large number of underwater tunnels and urban tunnels have emerged. Due to the particularity and complexity of the construction environment of such tunnels, they often have two characteristics: First, the construction method of mined tunneling is adopted, and the tunnel cross-section form is mostly arched. Second, the length of the tunnel's buried section is long, and the location of the intermediate air shaft is restricted, or even there is no condition to set it, resulting in a relatively long fixed-point ventilation / smoke exhaust air duct in the tunnel. The specific problems are as follows:

[0003] (1) The equipment power of the fixed-point ventilation / smoke exhaust system is large. The area requirement for the traditional tunnel fan room is large, increasing the civil engineering investment cost and construction risk. The air duct is extremely long, and the resistance of the fixed-point ventilation / smoke exhaust system is large. The air duct section is long, and the number of fixed-point normally closed ventilation / smoke exhaust openings on the air duct partition within the section is large. The frictional resistance and local resistance along the air duct are large, resulting in that the traditional tunnel ventilation and smoke exhaust system often requires multiple tunnel fans to be connected in series in the tunnel fan room to meet the air volume requirements. The distribution capacity of the tunnel fan is large, and the area requirement for the fan room is large, especially greatly increasing the civil engineering and construction cost. (2) For the fixed-point smoke exhaust system in the arched-section tunnel, smoke exhaust power equipment is added at the fixed-point smoke exhaust openings. Due to the large number of fixed-point smoke exhaust openings within the section, these devices greatly increase the distribution capacity of the power supply system, and the number of power distribution points is too many, so the capacity of the power supply system is very large, making the system implementation difficult and the operation and maintenance workload extremely large and the cost extremely high. (3) The fixed-point ventilation / smoke exhaust air duct in the arched-section tunnel is of a special-shaped section, while the conventional fan wall frame structure is rectangular, which is difficult to be applied to the fixed-point ventilation / smoke exhaust air duct in the arched-section tunnel. (4) The fixed-point ventilation / smoke exhaust system lacks a dynamic monitoring and intelligent decision-making system for the equipment during the system operation process. Once a device fails during the operation process, the power device in the air duct becomes a resistance component of the air duct, affecting the effect of the fixed-point ventilation / smoke exhaust system and endangering the safety of tunnel drivers and passengers. (5) The smoke exhaust power device of the fixed-point ventilation / smoke exhaust system in the arched-section tunnel is installed perpendicular to the length direction of the air duct. After being horizontally flipped, the smoke exhaust power device will still form local resistance to the air flow in the air duct, affecting the ventilation / smoke exhaust effect in the tunnel. At the same time, when the operation personnel conduct inspections in the air duct, they cannot cross the smoke exhaust power device, resulting in difficult maintenance along the line. (6) For the traditional tunnel fixed-point smoke exhaust system, the air outlet direction of the smoke exhaust power device cannot be reversed. The air duct, air valve, fan and other devices of the system are only used for one-way smoke exhaust during the fire condition and cannot realize the air supply condition, so the utilization of the configured devices is not sufficient. (7) The traditional tunnel fixed-point smoke exhaust system is equipped with constant-frequency fans and cannot flexibly adjust the smoke exhaust air volume according to the actual situation of fire smoke exhaust. If the distance between the fire point and the smoke exhaust fan is short, the wind speed at the smoke exhaust opening is large, and there is a situation of over-speed of the smoke exhaust wind. If the distance between the fire point and the smoke exhaust fan is long, the wind speed at the smoke exhaust opening is small, and there is a situation of slow smoke exhaust speed and poor effect. Summary of the Invention

[0004] To solve one of the above technical defects, a tunnel ventilation and smoke exhaust system is provided in an embodiment of the present application

[0005] According to an embodiment of the present application, there is provided a tunnel ventilation and smoke exhaust system, including a plurality of air duct relay devices, and each of the air duct relay devices is arranged at intervals in the air duct of the tunnel;

[0006] Among them, the air duct relay device can be flipped, and the flipping positions include covering the space enclosed by the air duct and avoiding the space enclosed by the air duct. The air duct relay device is used to keep covering the space enclosed by the air duct and provide positive pressure power in sections during a fire.

[0007] The top end of the cross-section of the air duct relay device is an arched structure, which matches the inner wall of the air duct.

[0008] By adopting the tunnel ventilation and smoke exhaust system provided in the embodiment of the present application, through setting an air duct relay device that can be flipped, when the air duct relay device is in a faulty state or needs to be shut down, it is flipped into the air duct partition groove. When the air duct relay device is closed in place, it just fits into the air duct partition groove, without occupying the air duct area during the operation of the air duct ventilation and smoke exhaust system, avoiding affecting the ventilation and smoke exhaust effect, and avoiding endangering the safety of tunnel drivers and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0010] Figure 1 is a schematic cross-sectional view of the tunnel ventilation and smoke exhaust system according to the embodiment of the present application with the air duct arranged at the top of the tunnel;

[0011] Figure 2 is a schematic longitudinal-sectional view of the tunnel ventilation and smoke exhaust system according to the embodiment of the present application with the air duct arranged at the top of the tunnel;

[0012] Figure 3 is a schematic cross-sectional view of the tunnel ventilation and smoke exhaust system according to the embodiment of the present application with the air duct arranged on the side of the tunnel;

[0013] Figure 4 is a schematic longitudinal-sectional view of the tunnel ventilation and smoke exhaust system according to the embodiment of the present application with the air duct arranged on the side of the tunnel;

[0014] Figure 5 is Figure 1 and Figure 2 is a front view of the retractable slide rail rolling curtain in

[0015] Figure 6 is Figure 1 and Figure 2 is a schematic view of the retracted state of the retractable slide rail rolling curtain in

[0016] Figure 7 is Figure 1 and Figure 2 is a schematic view of the deployed state of the retractable slide rail rolling curtain in

[0017] Description of the reference numerals in the drawings:

[0018] Main tunnel 1, air duct 2, air duct relay device 3, modular fan unit 4, electromagnetic buckle 5, channel steel frame 6, rotating shaft 7, telescopic device 8, laser distance measuring transmitter 9, air duct partition groove 10, normally closed electric ventilation and smoke exhaust opening 11, metal anti-collision strip 12, retractable slide rail rolling curtain 13, slide rail end groove 14, retractable slide rail 15, rolling curtain 16, rolling groove 17, laser distance measuring receiver 18. Detailed implementation manners

[0019] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further describes the exemplary embodiments of the present application in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0020] In the process of implementing the present application, the inventor found that in the prior art, once a device failure occurs during operation, the relay device in the air duct becomes a resistance component of the air duct, affecting the effect of the fixed-point ventilation / smoke exhaust system and endangering the safety of tunnel drivers and passengers.

[0021] Embodiment 1

[0022] In view of the above problems, the embodiments of the present application provide a tunnel ventilation and smoke exhaust system, as Figure 1-4 shown, including a plurality of air duct relay devices 3, and each air duct relay device 3 is arranged at intervals in the air duct 2 of the tunnel;

[0023] Among them, the air duct relay device 3 can be turned over, and the turning positions include covering the space surrounded by the air duct and avoiding the space surrounded by the air duct; the air duct relay device is used to keep covering the space surrounded by the air duct and provide positive pressure power in sections when a fire occurs.

[0024] In the normal state when no fire occurs in the tunnel, the air duct relay device keeps covering the space surrounded by the air duct. It can also act according to instructions. The modular fan unit of the air duct relay device rotates forward or backward, and the tunnel is ventilated or exhausted through the civil air duct.

[0025] When a fire occurs in the tunnel, the air duct relay device 3 keeps covering the space surrounded by the air duct. The ventilation and smoke exhaust system starts the smoke exhaust work, and the air duct relay device 3 works to provide positive pressure power in sections, and discharges the smoke along the air duct through the ventilation wells at both ends of the tunnel.

[0026] When the air duct relay device is in a fault state or needs to be closed, the air duct relay device flips into the air duct partition groove. When the air duct relay device is in place, it just fits into the air duct partition groove, without occupying the air duct area during the operation of the air duct ventilation and smoke exhaust system.

[0027] In implementation, the top of the cross-section of the air duct relay device 3 is an arched structure, which matches the inner wall of the air duct 2.

[0028] The top of the cross-section of the air duct relay device 3 is an arched structure, which matches the inner wall of the air duct 2. It solves the technical barrier of applying the air duct relay device in the fixed-point ventilation / smoke exhaust system of the arched-section tunnel.

[0029] Specifically, as Figure 1 and Figure 3 shown, the tunnel includes the main tunnel 1 and the air duct 2.

[0030] Specifically, the air duct is an air duct for fixed-point ventilation and smoke exhaust with an arched cross-section. The overall outer contour of the partition groove is arched, which fits the cross-section contour of the top of the tunnel air duct.

[0031] In implementation, as Figure 2 and Figure 4 shown, the air duct partition is provided with an air duct partition groove 10. When the air duct relay device 3 avoids the space enclosed by the air duct, it flips into the air duct partition groove 10.

[0032] Among them, the air duct is enclosed by the air duct partition and the inner side of one side of the tunnel.

[0033] By setting the air duct partition groove 10, when the air duct relay device 3 is in a fault state or when it is necessary for the air duct relay device 3 to avoid the space enclosed by the air duct, the air duct relay device 3 flips into the air duct partition groove 10 and fits into the air duct partition groove 10. In this way, it does not occupy the air duct area during the operation of the air duct ventilation and smoke exhaust system.

[0034] Specifically, the air duct partition is provided with a plurality of air duct openings along the length direction, and a normally closed electric ventilation and smoke exhaust opening 11 is arranged at the position of the air duct opening. So that when a fire occurs and the normally closed electric ventilation / smoke exhaust opening 11 is opened, the smoke in the main tunnel 1 can enter the air duct through the opened normally closed electric ventilation / smoke exhaust opening 11.

[0035] In implementation, as Figure 1 and Figure 3 shown, the air duct relay device 3 includes:

[0036] A plurality of modular fan groups 4;

[0037] A channel steel frame 6, and each of the modular fan groups 4 is installed on the channel steel frame 6;

[0038] The tunnel ventilation and smoke exhaust system further includes:

[0039] A rotating shaft 7, installed on one side of the channel steel frame 6;

[0040] A rotating shaft mounting bracket, fixed inside the air duct. The rotating shaft is rotatably installed at the rotating shaft mounting bracket so that the air duct relay device can rotate around the rotating shaft.

[0041] The cooperation of the air duct relay device, the rotating shaft and the rotating shaft mounting bracket enables the air duct relay device to rotate, thereby enabling the air duct relay device to flip, and the flipping positions include covering the space enclosed by the air duct and avoiding the space enclosed by the air duct.

[0042] During implementation, as Figure 2 and Figure 4 shown, the tunnel ventilation and smoke exhaust system further includes:

[0043] A telescopic device 8 that can be telescoped. One end of the telescopic device 8 is connected to the air duct partition, and the other end of the telescopic device 8 is connected to the back side of the channel steel frame 6;

[0044] Among them, the telescoping of the telescopic device 8 provides power for the flipping of the air duct relay device 3.

[0045] When the telescopic device extends, it drives the air duct relay device to rotate to cover the space enclosed by the air duct. When the telescopic device retracts, it drives the air duct relay device to reset and avoid the space enclosed by the air duct.

[0046] During implementation, the tunnel ventilation and smoke exhaust system is characterized by further including a ranging device and an intelligent monitoring and decision-making module. As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the ranging device includes:

[0047] A laser ranging transmitter 9, installed at the middle position in the width direction of the air duct partition groove 10 away from the rotating shaft side;

[0048] A laser ranging receiver 18, installed at the middle position of the channel steel frame away from the rotating shaft side, for receiving the signal emitted by the laser ranging transmitter; when the air duct relay device is performing the opening or closing operation, the distance and angle between the laser ranging receiver and the laser ranging transmitter are constantly changing, and the laser receiver feeds back the captured laser signal to the intelligent monitoring and decision-making module;

[0049] The intelligent monitoring and decision-making module is used for the laser receiver to capture the laser signal, and realizes on-line monitoring and real-time control of the opening angle between the air duct relay device and the inner bottom of the air duct.

[0050] During implementation, the intelligent monitoring and decision-making module is specifically configured to:

[0051] Determine and display the actual angle between the air duct relay device and the air duct partition:

[0052] When the air duct relay device performs an opening operation and the actual angle between the air duct relay device and the air duct partition is less than 90°, send an elongation command to the telescopic device:

[0053] When the actual angle between the air duct relay device and the air duct partition is equal to 90°, stop sending the elongation command;

[0054] When the elongation command is sent to the telescopic device for a preset number of times and the actual angle between the air duct relay device and the air duct partition is still less than 90°, display the actual angle between the air duct relay device and the air duct partition and issue an alarm.

[0055] During implementation, the intelligent monitoring and decision-making module is also specifically configured to:

[0056] When the air duct relay device performs a closing operation and the actual angle between the air duct relay device and the air duct partition is greater than 0°, send a retraction command to the telescopic device:

[0057] When the actual angle between the air duct relay device and the air duct partition is equal to 0°, stop sending the retraction command;

[0058] When the retraction command is sent to the telescopic device for a preset number of times and the actual angle between the air duct relay device and the air duct partition is still greater than 0°, display the actual angle between the air duct relay device and the air duct partition and issue an alarm.

[0059] During implementation, as Figure 1 and Figure 3 shown, the tunnel ventilation and smoke exhaust system further includes:

[0060] A plurality of electromagnetic buckles 5, which are respectively installed on the side of the back of the channel steel frame 6 away from the rotating shaft and at the position where the air duct faces the air duct partition;

[0061] When it is necessary to keep the air duct relay device in an open state, after confirming that the telescopic device stops moving, the electromagnetic buckles are turned on and powered on and maintained. The electromagnetic buckles are tightly adsorbed together through electromagnetic effects, making the channel steel frame firm and stable;

[0062] When the air duct relay device needs to perform a closed state, first turn off the power of the electromagnetic buckles to release the magnetism of the electromagnetic buckles, and then the telescopic device operates.

[0063] During implementation, as Figure 2 and Figure 4As shown, metal anti-collision strips 12 are provided at the positions of two corners and one vertex of the bottom of the partition groove 10 corresponding to the channel steel frame 6.

[0064] Specifically, the height of the metal anti-collision strip is 5 mm to avoid hard collision between the air duct relay device and the partition groove when it shuts down.

[0065] Specifically, the depth of the partition groove 10 ranges from greater than or equal to 500 mm to less than or equal to 800 mm, ensuring that the air duct relay device does not protrude from the bottom surface of the air duct in the shutdown state, and at the same time, the size of the partition groove should meet the equipment maintenance and operation space of not less than 200 mm around the equipment.

[0066] Specifically, the modular fan unit 4 is composed of multiple single-module fans, and each single-module fan can operate bidirectionally. Each single-module fan can execute the running or stopping action according to the input signal of the intelligent monitoring decision module.

[0067] Specifically, the air duct relay device also includes an operation monitor. The operation monitor can monitor in real time parameters such as the wind speed, wind pressure, motor bearing temperature, stator temperature, motor voltage, current, power, and vibration frequency of the single-module fan, and transmit the data to the intelligent monitoring decision module by wired or wireless means.

[0068] Specifically, the air duct relay device and its components all meet the requirements of withstanding temperatures of 280°C·1h to 650°C·1h. The expansion device meets the requirements of withstanding temperatures of 280°C·1h to 650°C·1h. The laser distance sensor needs to meet the requirements of withstanding temperatures of 280°C·1h to 650°C·1h.

[0069] When a fire breaks out in the main tunnel, the normally closed electric ventilation and smoke exhaust openings near the fire source are opened, and the smoke in the driving tunnel is controlled within a range of 600 m from the fire area. The smoke enters the civil air duct through the normally closed electric ventilation and smoke exhaust openings, and the air duct relay device provides positive pressure power in sections to discharge the smoke along the air duct through the ventilation shaft. Similarly, in the normal ventilation condition, the air duct relay device can also operate or stop according to the command, and can rotate forward or backward during operation to supply air or exhaust air to the tunnel through the civil air duct.

[0070] Specifically, the intelligent monitoring and decision-making module is located in the tunnel monitoring and control center. It can receive the transmission signals from the modular fan unit operation monitor and the laser distance sensor, and perform processing operations, real-time monitoring, determination, and display of the real-time angle between the air duct relay device and the air duct bottom plate. For example, when the air duct relay device is performing the opening operation and the angle is less than 90°, the intelligent monitoring and decision-making module continuously sends instructions to the telescopic device to adjust the spatial position of the air duct relay device in the air duct until the air duct relay device reaches the open state and meets the operation requirements. If the air duct relay device fails to open or close in place, the specific value of its opening angle is displayed in the monitoring center to remind the tunnel management personnel to perform maintenance and repair in a timely manner. At the same time, the intelligent monitoring and decision-making module can make real-time decisions on the action states of the air duct relay device, each individual fan of the modular fan unit, the electromagnetic buckle, and the retractable slide rail rolling curtain device according to the tunnel ventilation / smoke exhaust control mode and the actual on-site situation, so as to realize the switching of the operation state of the air duct relay device.

[0071] Tunnel ventilation and smoke exhaust system. When a fire breaks out in the tunnel or there is a ventilation requirement, the fire location or the location where the CO concentration exceeds the standard is determined based on the fire location detection device, wind speed sensor, CO concentration detection device, smoke concentration detection device, NOx concentration detection device, camera, etc. in the tunnel, and the normally closed electric ventilation and smoke exhaust outlets within a range of 200 m to 600 m nearby are opened. When a fire occurs, the corresponding tunnel smoke exhaust fan and the modular fan unit of the air duct relay device are turned on according to the pre-set tunnel fire condition mode table. After the air duct relay device is turned on, a negative pressure is formed at the normally closed electric ventilation / smoke exhaust outlet, forming a relay series relationship with the tunnel smoke exhaust fan at the air shaft end, and the smoke in the air duct is discharged from the tunnel. At the same time, the intelligent monitoring and decision-making module calculates the individual fans that need to be loaded or unloaded according to the detection signals of the on-site fire location detection device, wind speed sensor, CO concentration detection device, and smoke concentration detection device, so as to ensure the smoke exhaust effect of the tunnel; when the CO concentration, smoke concentration, NOx concentration, etc. in the tunnel exceed the standard, the corresponding tunnel ventilation fan and the modular fan unit of the air duct relay device are turned on according to the pre-set tunnel ventilation condition mode table, and at the same time, a relay series relationship is formed with the tunnel ventilation fan at the air shaft end, and the air flow in the air duct is discharged from the tunnel or air is sent into the tunnel from the atmosphere. At the same time, the intelligent monitoring and decision-making module calculates the individual fans that need to be loaded or unloaded according to the detection signals of the on-site wind speed sensor and NOx concentration detection device, so as to ensure the ventilation effect of the tunnel; the health status and spatial position deviation of the air duct relay device are displayed in real time on the monitoring screen of the tunnel monitoring center. The normally closed electric ventilation / smoke exhaust outlet, air duct relay device, electromagnetic buckle, telescopic device, retractable slide rail rolling curtain device, tunnel smoke exhaust fan, and tunnel ventilation fan are all connected and controlled by the monitoring center. The fan operation state parameters collected by the operation monitor and the spatial position parameters of the air duct relay device collected by the laser distance sensor are transmitted, analyzed, and stored through communication technology and the Internet of Things cloud platform. The sensor parameters, measurement data, etc. are displayed through the Internet WEB page, realizing the application of the Internet of Things and the intelligent monitoring and decision-making system for extra-long tunnels, dynamically deciding the operation states of the normally closed electric ventilation / smoke exhaust outlet, air duct relay device, tunnel smoke exhaust fan, and tunnel ventilation fan, and making the fixed-point ventilation / smoke exhaust system intelligent and smart.

[0072] Embodiment 2

[0073] In this embodiment, as Figure 2 and Figure 4 shown, the air duct 2 is formed at the side position inside the tunnel, and the air duct partition is arranged vertically.

[0074] Embodiment 3

[0075] In this embodiment, as Figure 1 and Figure 2 shown, the air duct 2 is formed at the top position inside the tunnel, and the air duct partition is arranged horizontally.

[0076] Specifically, the air duct is arranged along the length direction of the tunnel and is set at the top of the tunnel. A civil partition is provided between the air duct and the main tunnel as the air duct partition. The air duct partition is a common reinforced concrete structure and is cast together with the main tunnel structure or constructed as a secondary structure.

[0077] The state of the air duct relay device in the air duct can be divided into open and closed according to its spatial position, and can be divided into running and stopped according to its working state. The open state means that the air duct relay device is perpendicular to the air duct partition in the air duct, with an included angle of 90°. The closed state means that the air duct relay device is parallel to the air duct partition in the air duct and is located in the groove of the air duct partition, with an included angle of 0°. The running state means that when the air duct relay device is in the open state, each individual fan of the modular fan unit rotates forward or backward; the stopped state means that when the air duct relay device is in the open or closed state, each individual fan of the modular fan unit stops running. The initial state of the air duct relay device is open and stopped. When the air duct relay device works normally, the state during ventilation / smoke exhaust is open and running. When the opening angle of the channel steel frame of the air duct relay device is not in place or the operating personnel inspect the air duct, the state of the air duct relay device is closed and stopped.

[0078] This embodiment also has the following features:

[0079] As Figure 5 、 Figure 6 and Figure 7 shown, the tunnel ventilation and smoke exhaust system further includes a retractable slide rail rolling curtain 13; the retractable slide rail rolling curtain 13 includes:

[0080] A rolling groove 17, installed on the back side of the channel steel frame 6;

[0081] A retractable slide rail 15, arranged in the rolling groove 17, and the telescopic direction of the retractable slide rail is consistent with the width direction of the air duct;

[0082] A rolling curtain 16, the rolling curtain 16 is wound in the rolling groove and is located above the retractable slide rail;

[0083] A slide rail end groove 14, opened on the side wall of the tunnel;

[0084] Among them, when the air duct relay device is flipped into the groove of the air duct partition, the retractable slide rail extends until the open end of the retractable slide rail extends into the slide rail end groove when the air duct relay device is laid down at the air duct partition, and the rolling curtain unfolds from the rolling groove and is laid on the retractable slide rail.

[0085] In this way, when the air duct relay device is flipped into the groove of the air duct partition, a rolling curtain is laid on the retractable slide rail in the width direction of the air duct, and the personnel in the air duct can walk in the width and length directions of the air duct.

[0086] Specifically, when the retractable slide rail of the retractable slide rail rolling curtain is extended to the position where the open end of the retractable slide rail extends into the slide rail end slot, there is a position on the retractable slide rail that cannot accommodate people stepping on it, such as various openings or equipment in the air duct.

[0087] Specifically, the rolling curtain is made of a series of metal sheets, with high compressive strength. The retractable slide rail below the rolling curtain serves as a force-bearing support point for people to pass through. At the same time, the surface of the rolling curtain is flat after unfolding, covering the air duct relay device below to prevent it from becoming a local resistance during the operation of the ventilation / smoke exhaust system.

[0088] Specifically, there are two retractable slide rails. The width of the rolling curtain is greater than that of the two retractable slide rails. After the rolling curtain unfolds, it covers the two retractable slide rails and the space between them. In this way, people can pass through all positions above the retractable slide rails, and the rolling curtain air duct relay device is covered below to prevent it from becoming a local resistance during the operation of the ventilation / smoke exhaust system.

[0089] The key technologies solved by this application are:

[0090] (1) Solved the technical barrier of applying the air duct relay device in the fixed-point ventilation / smoke exhaust system of the arched-section tunnel.

[0091] (2) Achieved the effective avoidance of local resistance while the air duct relay device provides power, and provided a solution for the operation personnel to conduct inspections along the air duct.

[0092] (3) Realized the dynamic monitoring and intelligent decision-making of the operating state of the air duct relay device, increasing the reliability of the fixed-point ventilation / smoke exhaust system by more than 100%.

[0093] (4) Without changing the scale of the fixed-point ventilation / smoke exhaust air duct, the power in the ventilation and smoke exhaust air duct is increased by more than 1000 Pa. With the increase in the number of sets set, the power can be increased infinitely. The system power distribution capacity is reduced by 50%, and at the same time, the area of the traditional dedicated tunnel fan room is reduced by 40%, saving at least more than 9 million yuan in civil engineering and construction costs.

[0094] (5) Make full use of the existing air duct and the fixed-point smoke exhaust outlet, and combine the characteristics of the two-way operation of the air duct relay device to realize the fixed-point smoke exhaust or ventilation condition of the tunnel.

[0095] (6) Realized the flexible adjustment of the smoke exhaust air volume / ventilation air volume according to the actual smoke exhaust / ventilation effect, which can not only ensure the smoke exhaust / ventilation effect, but also save the operation cost.

[0096] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0097] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0098] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0099] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A tunnel ventilation and smoke exhaust system, characterized in that, It includes a plurality of air duct relay devices (3), and each of the air duct relay devices (3) is arranged at intervals in the air duct (2) of the tunnel; Among them, the air duct relay device (3) can be flipped, and the flipping positions include covering the space enclosed by the air duct and avoiding the space enclosed by the air duct. The air duct relay device is used to keep covering the space enclosed by the air duct and provide positive pressure power in sections in case of a fire; The top end of the cross-section of the air duct relay device (3) is an arched structure, which matches the inner wall of the air duct (2); The air duct partition is provided with an air duct partition groove (10). When the air duct relay device (3) avoids the space enclosed by the air duct, it is flipped into the air duct partition groove (10); Among them, the air duct is formed by enclosing the air duct partition and the inner side of one side of the tunnel; The air duct relay device (3) includes: A plurality of modular fan groups (4); A channel steel frame (6), and each of the modular fan groups (4) is installed on the channel steel frame (6); The tunnel ventilation and smoke exhaust system further includes: A rotating shaft, installed on one side of the channel steel frame; A rotating shaft mounting bracket, fixed in the air duct. The rotating shaft is rotatably installed at the rotating shaft mounting bracket so that the air duct relay device can rotate around the rotating shaft; The tunnel ventilation and smoke exhaust system further includes: A telescopic device (8) that can be telescoped. One end of the telescopic device (8) is connected to the air duct partition, and the other end of the telescopic device (8) is connected to the back side of the channel steel frame (6); Among them, the telescoping of the telescopic device (8) provides power for the flipping of the air duct relay device (3); The air duct is formed at the top position inside the tunnel, and the air duct partition is arranged horizontally; The tunnel ventilation and smoke exhaust system further includes a retractable slide rail rolling curtain; the retractable slide rail rolling curtain includes: A rolling groove, installed on the back side of the channel steel frame; A retractable slide rail, arranged in the rolling groove, and the telescopic direction of the retractable slide rail is consistent with the width direction of the air duct; A rolling curtain, which is wound in the rolling groove and is located above the retractable slide rail; A slide rail end groove, opened on the side wall of the tunnel; Among them, when the air duct relay device is flipped into the air duct partition groove, the retractable slide rail extends until the open end of the retractable slide rail extends into the slide rail end groove when the air duct relay device is laid down on the air duct partition, and the rolling curtain unfolds from the rolling groove and is laid on the retractable slide rail; 2. The tunnel ventilation and smoke exhaust system according to claim 1, characterized in that, It further includes a ranging device and an intelligent monitoring and decision-making module. The ranging device includes: A laser ranging transmitter (9), installed at the middle position in the width direction of the side of the air duct partition groove (10) away from the rotating shaft; A laser ranging receiver (18), installed at the middle position in the height direction of the channel steel frame, for receiving the signal emitted by the laser ranging transmitter; when the air duct relay device is performing the opening or closing operation, the distance and angle between the laser ranging receiver and the laser ranging transmitter are constantly changing, and the laser receiver feeds back the captured laser signal to the intelligent monitoring and decision-making module; The intelligent monitoring and decision-making module is used to receive and process the laser signals captured by the laser receiver, and realizes on-line monitoring and real-time control of the opening angle between the air duct relay device and the air duct partition board.

3. The tunnel ventilation and smoke exhaust system according to claim 2, characterized in that, It further includes: A plurality of electromagnetic buckles are respectively installed on the side of the back of the channel steel frame away from the rotating shaft and at the position where the air duct faces the air duct partition board; When it is necessary for the air duct relay device to maintain an open state, after confirming that the telescopic device stops moving, the electromagnetic buckles are turned on and powered on and maintained. The electromagnetic buckles are tightly adsorbed together through electromagnetic effects, making the channel steel frame firm and stable; When the air duct relay device needs to be in a closed state, first turn off the power of the electromagnetic buckles to release the magnetism of the electromagnetic buckles, and then the telescopic device acts.

4. The tunnel ventilation and smoke exhaust system according to claim 3, characterized in that, Metal anti-collision strips are arranged at the positions of two corners and one vertex corresponding to the bottom of the air duct partition groove (10) and the channel steel frame (6).

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