A device for inhibiting the longitudinal flow of polluted air adjacent to a tunnel

Abstract

This utility model relates to the field of tunnel engineering technology, and in particular to a device for suppressing the crossflow of longitudinal polluted air from adjacent tunnels in highways. It includes a vertical blowing assembly, which is installed below the road surface between adjacent tunnels. The vertical blowing assembly is evenly distributed laterally along the tunnel road surface, and the upward airflow from the vertical blowing assembly connects laterally to form an air curtain. The width of the air curtain is greater than or equal to the width of the tunnel. The upward blowing of the vertical blowing assembly forms an air curtain, providing upward force to the longitudinal polluted air discharged from the outlet of the upstream tunnel, changing its free jet diffusion trajectory, and using the air force to blow the longitudinal polluted air above the tunnel clearance height, thereby suppressing the crossflow of longitudinal polluted air from the upstream tunnel to the downstream tunnel.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering technology, and in particular to a device for suppressing longitudinal airflow from adjacent tunnels on highways. Background Technology

[0002] With the rapid development of my country's highway network, tunnel engineering is becoming increasingly complex and dense. In mountainous or urban underground spaces, due to terrain and planning constraints, multiple tunnels are often arranged in parallel or staggered configurations, adjacent to each other. However, during operation, the coupling of aerodynamic effects between these adjacent tunnels can easily lead to cross-flow of polluted air between tunnels. This means that polluted air (such as vehicle exhaust and dust) from one tunnel can intrude into downstream adjacent tunnels, severely compromising the stability of the ventilation system. Traditional tunnel ventilation designs are mostly based on the independent operation mode of a single tunnel, failing to fully consider the aerodynamic coupling effect of multiple tunnels. This results in uncontrolled pollutant diffusion, a surge in ventilation energy consumption, and even safety hazards such as reduced visibility during actual operation.

[0003] Current technologies for controlling cross-flow of polluted air have significant limitations: while physical isolation measures (such as partitions and tunnels) can block lateral flow paths between tunnels, they cannot control longitudinal cross-flow of polluted air between adjacent tunnels. In emergencies such as fires inside tunnels, if cross-flow of polluted air cannot be suppressed, harmful gases will spread into downstream tunnels, hindering personnel evacuation and rescue efforts, and ultimately affecting the overall operational safety of the tunnel complex.

[0004] Therefore, there is an urgent need to develop a device to suppress longitudinal airflow from adjacent tunnels on highways, in order to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main objective of this invention is to provide a device for suppressing the crossflow of longitudinal pollutant air between adjacent tunnels on highways, so as to solve the technical problem that the prior art cannot suppress the crossflow of longitudinal pollutant air between adjacent tunnels.

[0006] To achieve the above objectives, this utility model provides a device for suppressing longitudinal airflow from adjacent tunnels on highways, including a vertical blowing assembly. The vertical blowing assembly is disposed below the road surface between adjacent tunnels. The vertical blowing assembly is evenly distributed laterally along the tunnel road surface. The airflow blown upward by the vertical blowing assembly is connected laterally to form an air curtain. The width of the air curtain is greater than or equal to the width of the tunnel.

[0007] Preferably, the vertical air blowing assembly is located at the exit of the upstream tunnel.

[0008] Preferably, the vertical air blowing assembly includes a fan and a main air duct, the fan and the main air duct are connected, the top of the main air duct is connected to the tunnel road surface, and the top of the main air duct has multiple strip-shaped air outlets.

[0009] More preferably, the fan is two axial flow fans, which are respectively connected to both ends of the main air duct and deliver air to the main air duct.

[0010] More preferably, it also includes a partition plate, which is fixed to the middle of the main air duct to divide the main air duct into two independent areas.

[0011] More preferably, the connection between the axial flow fan and the main air duct is a flexible connection.

[0012] More preferably, the main air duct is made of reinforced concrete, the inner wall of the main air duct is flat, and the cross-sectional dimensions of the main air duct are 80cm×100cm.

[0013] Furthermore, it also includes a drainage system for draining the main air duct, the drainage system being located below the main air duct and connected to the main air duct.

[0014] More preferably, the drainage system includes a drainage well, a connecting pipe, and an overflow well. The drainage well is fixed below the main air duct and is connected to the main air duct. The overflow well is located underground. The two ends of the connecting pipe are connected to the drainage well and the overflow well, respectively.

[0015] More preferably, the top surface of the overflow well is higher than the bottom surface of the drainage well.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, the vertical blowing component blows air upwards to form an air curtain, providing upward blowing force for the longitudinal polluted air discharged from the upstream tunnel exit. This alters the diffusion trajectory of the free jet and, with the help of the wind force, directs the longitudinal polluted air above the tunnel clearance height, thereby inhibiting the longitudinal polluted air from flowing from the upstream tunnel to the downstream tunnel, reducing the pollution load of the downstream tunnel, ensuring the driving environment of the downstream tunnel, not increasing the ventilation energy consumption of the downstream tunnel, providing a more favorable environment for personnel evacuation and rescue, and effectively improving the overall operational safety of the tunnel group. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1This is a front view of an application scenario diagram of the vertical blower assembly in one embodiment of the present utility model;

[0020] Figure 2 This is a top view of an application scenario diagram of the vertical blower assembly in one embodiment of the present utility model;

[0021] Figure 3 This is a side view of an application scenario of the vertical blower assembly in one embodiment of the present invention.

[0022] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0023] Explanation of icon numbers:

[0024] 10. Upstream tunnel; 20. Downstream tunnel; 30. Vertical blowing assembly; 310. Fan; 320. Main air duct; 330. Strip air outlet; 340. Partition plate; 410. Drainage well; 420. Connecting pipe; 430. Overflow well; 50. Longitudinal sludge. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Please see Figures 1 to 3 As shown in the figure, the large arrow indicates the flow direction of the longitudinal polluted air 50. This embodiment provides a device for suppressing the crossflow of longitudinal polluted air 50 between adjacent tunnels on highways, including a vertical blowing assembly 30. The vertical blowing assembly 30 is disposed below the road surface between adjacent tunnels. The vertical blowing assembly 30 is evenly distributed laterally along the tunnel road surface. The airflow blown upward by the vertical blowing assembly 30 is connected laterally to form an air curtain. The width of the air curtain is greater than or equal to the width of the tunnel.

[0030] In this invention, the vertical blowing component 30 blows air upward to form an air curtain, providing upward blowing force for the longitudinal polluted air 50 discharged from the outlet of the upstream tunnel 10. This alters the diffusion trajectory of the free jet and, with the help of the wind force, directs the longitudinal polluted air 50 to above the tunnel clearance height, thereby inhibiting the longitudinal polluted air 50 from flowing from the upstream tunnel 10 to the downstream tunnel 20. This reduces the pollution load of the downstream tunnel 20, ensures the driving environment of the downstream tunnel 20, does not increase the ventilation energy consumption of the downstream tunnel 20, provides a more favorable environment for personnel evacuation and rescue, and effectively improves the overall operational safety of the tunnel group.

[0031] Preferably, the vertical air blowing assembly 30 is located at the outlet of the upstream tunnel 10. The air curtain is located at the outlet of the upstream tunnel 10, and after providing an upward deflection for the longitudinal polluted air 50, the air curtain has sufficient space to deflect it, thereby ensuring that the longitudinal polluted air 50 does not flow into the downstream tunnel 20.

[0032] In one embodiment, the vertical blowing assembly 30 is a fan 310 arranged in a row below the road surface along the tunnel surface, and the fan 310 blows air upward through the air outlet to form an air curtain.

[0033] In another embodiment, preferably, the vertical air blowing assembly 30 includes a fan 310 and a main air duct 320, which are connected. The top of the main air duct 320 is connected to the tunnel surface, and multiple strip-shaped air outlets 330 are provided on the top of the main air duct 320. The fan 310 distributes airflow laterally along the tunnel surface through the main air duct 320. After positive pressure is formed inside the main air duct 320, airflow is blown upward through the strip-shaped air outlets 330. The airflows connect to form an air curtain, which actively interferes with the diffusion trajectory of polluted air in the tunnel, thereby inhibiting polluted air from flowing from the upstream tunnel 10 to the downstream tunnel 20. The main air duct 320 can distribute the air supply from a few fans 310 to various corners within the main air duct 320. After positive pressure is formed inside the main air duct 320, airflow is blown upward, thereby reducing the number of fans 310 required. Even a single sufficiently powerful fan 310 may suffice.

[0034] In this embodiment, as a further preferred embodiment, the fan 310 consists of two axial flow fans, which are respectively connected to both ends of the main air duct 320 and deliver air into the main air duct 320. A partition plate 340 is also included, which is fixed to the middle of the main air duct 320 to divide the main air duct 320 into two independent areas. The two axial flow fans deliver air inward from both ends of the main air duct 320, with completely opposite airflow directions, accelerating the formation of positive pressure in the main air duct 320 and enhancing the airflow force of the air curtain. The partition plate 340 divides the main air duct 320 into two independent areas, left and right, with the axial flow fans at both ends delivering air, further enhancing the airflow force of the air curtain and thus increasing the upward deflection angle of the polluted air in the tunnel.

[0035] In this embodiment, the connection between the axial flow fan and the main air duct 320 is preferably a flexible connection, ideally a flexible hose. This eliminates the adverse effects of vibrations from the fan 310 during operation on the tunnel entrance and road surface structure.

[0036] Specifically, the main air duct 320 is constructed of reinforced concrete. The inner wall of the main air duct 320 is flat and leveled after being poured with C30 cement. The cross-sectional dimensions of the main air duct 320 are 80cm × 100cm. The flat inner wall and appropriately sized main air duct 320 can significantly reduce the wind resistance coefficient, thereby reducing the energy consumption of the fan 310.

[0037] In one embodiment, considering that the vertical air blowing assembly 30 is located in an open environment (connected to the exit of the upstream tunnel 10) and the strip-shaped air outlet 330 is an external outlet, this embodiment also includes a drainage system. The drainage system is located below the main air duct 320 and includes a drainage well 410, a connecting pipe 420, and an overflow well 430. The drainage well 410 is fixed below the main air duct 320 and is connected to the main air duct 320. The overflow well 430 is located underground. The connecting pipe 420 connects to both the drainage well 410 and the overflow well 430 at both ends. The top of the overflow well 430 is higher than the bottom of the drainage well 410.

[0038] Specifically, such as Figure 1 and Figure 2 As shown in the diagram, the small arrows indicate the airflow direction of the fan 310. The dimensions of the drainage well 410 are 50×50×80cm, and the dimensions of the overflow well 430 are 100×100×100cm. Both the drainage well 410 and the overflow well 430 are concrete water tanks. Preferably, the top surface of the overflow well 430 is 30cm higher than the ground surface of the drainage well 410 to meet the water sealing requirements. The dimensions of the water tanks can be adjusted accordingly.

[0039] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for suppressing longitudinal drafts from adjacent tunnels in highways, characterized in that, It includes a vertical air blowing assembly, which is installed below the road surface between adjacent tunnels. The vertical air blowing assembly is evenly distributed laterally along the tunnel road surface. The airflow blown upward by the vertical air blowing assembly is connected laterally to form an air curtain. The width of the air curtain is greater than or equal to the width of the tunnel.

2. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 1, characterized in that, The vertical air blowing assembly is located at the exit of the upstream tunnel.

3. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 1, characterized in that, The vertical air blowing assembly includes a fan and a main air duct. The fan and the main air duct are connected. The top of the main air duct is connected to the tunnel road surface, and multiple strip-shaped air outlets are opened at the top of the main air duct.

4. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 3, characterized in that, The fan consists of two axial flow fans, which are respectively connected to both ends of the main air duct and deliver air into the main air duct.

5. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 4, characterized in that, It also includes a partition plate, which is fixed to the middle of the main air duct to divide the main air duct into two independent areas.

6. The longitudinal airflow suppression device for adjacent tunnels in highways according to claim 4, characterized in that, The connection between the axial flow fan and the main air duct is a flexible connection.

7. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 3, characterized in that, The main air duct is made of reinforced concrete, with a flat inner wall and a cross-sectional dimension of 80cm × 100cm.

8. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 1, characterized in that, It also includes a drainage system for draining the main air duct, which is located below the main air duct and connected to the main air duct.

9. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 8, characterized in that, The drainage system includes a drainage well, a connecting pipe, and an overflow well. The drainage well is fixed below the main air duct and is connected to the main air duct. The overflow well is located underground. The two ends of the connecting pipe are connected to the drainage well and the overflow well, respectively.

10. The device for suppressing longitudinal airflow from adjacent tunnels in highways according to claim 9, characterized in that, The top of the overflow well is higher than the bottom of the drainage well.

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