Novel ventilation structure for tunnel

Abstract

A novel ventilation structure for a tunnel comprises a roadbed and the tunnel. The inner wall of the arched top of the tunnel is fixedly provided with an air inducing duct partition plate along the cambered surface of the tunnel, and the two sides of the tunnel expand outwards and form a cavity with the air inducing duct partition plate; a plurality of sealing partition plates are arranged in the cavity, and the cavity is divided into a plurality of air inducing channels by the sealing partition plates; an air supply duct partition plate is arranged above the inner wall of the tunnel, and the air supply duct partition plate and the induced air duct partition plate form an air supply duct; the upper end of the air inducing duct communicates with the air supply duct, and the lower end of the air inducing duct communicates with the bottom of the tunnel. The air guide channels are formed in the two sides of the tunnel to guide and distribute air flow conveyed by the air supply channels, air quantity is evenly distributed, so that outside fresh air is fed into the tunnel through the air supply holes, the height of the air supply holes is equal to the height between the automobile exhaust pipe and a roadbed, automobile exhaust gas can be diluted as soon as possible, air exchange is accelerated, and the service life of the automobile exhaust pipe is prolonged. And a reasonable air distribution is formed with exhaust air, so that the ventilation effect in the tunnel is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel ventilation, in particular to a novel ventilation structure for a tunnel. Background Art

[0002] In recent years, with the rapid development of highway construction, in order to overcome terrain restrictions, improve line shape, and shorten driving distance in mountainous areas, more and more highways choose to build tunnels to solve these problems. As the length of highway tunnels becomes longer and longer, the air circulation in the tunnel is not smooth, and the exhaust gas emitted by cars accumulates in the tunnel, resulting in poor air quality in the tunnel.

[0003] At present, the main air duct of the tunnel is usually used in the full horizontal and semi-horizontal ventilation system. It is arranged on the upper or side of the tunnel along the longitudinal direction of the tunnel. The air supply holes are directly arranged on the air supply duct partition, and fresh air is blown directly into the tunnel from the air supply duct. This form allows air exchange to be carried out in the upper part of the tunnel, and the polluted air in the lower part of the tunnel cannot be exchanged, resulting in poor ventilation effect; the wind speed blown in will be large due to the close distance between the air supply hole and the axial flow fan, and small due to the long distance, resulting in uneven wind speed. Summary of the invention

[0004] The purpose of the utility model is to provide a novel ventilation structure for a tunnel to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A new ventilation structure for a tunnel comprises a roadbed and a tunnel, wherein the roadbed is located below the tunnel; an air duct partition is fixedly installed along the arc surface of the inner wall of the arched top of the tunnel, wherein both sides of the tunnel expand outwards and form a cavity with the air duct partition; a plurality of sealing partitions are arranged in the cavity, wherein the sealing partitions divide the cavity into a plurality of air ducts; an air supply duct partition is arranged above the inner wall of the tunnel, wherein both sides of the air supply duct partition are respectively fixedly connected to the inner wall of the air duct partition, wherein the air supply duct partition and the air duct partition form an air supply duct; the upper end of the air duct is connected to the air supply duct, wherein the lower end of the air duct is connected to the bottom of the tunnel.

[0007] Preferably, an air inlet hole is provided at the upper end of the air duct close to the air supply duct, and an air supply hole is provided at the lower end of the air duct close to the main tunnel of the tunnel, wherein the air inlet hole corresponds to the air supply hole one by one.

[0008] Preferably, the air inlet hole is connected to the air inlet duct and the air supply duct, wherein an air volume regulating valve is installed in the air inlet hole.

[0009] Preferably, the air supply hole is connected to the air duct and the main tunnel, wherein a louver exhaust grille is installed in the air supply hole.

[0010] Preferably, the air volume regulating valve comprises a shell, wherein the shell is fixedly connected to the inner wall of the air inlet hole; three groups of blades are arranged in the shell, wherein a rotating shaft is installed in the middle of each blade, and both ends of the rotating shaft respectively penetrate the shell and extend outward.

[0011] Preferably, a support seat is symmetrically mounted on the outer side wall of the shell, wherein both ends of the rotating shaft are rotatably connected to the support seat via bearings respectively.

[0012] Preferably, one end of the rotating shaft passes through the support seat and extends outward, wherein the extended end of the rotating shaft is fixedly connected to a rotating arm; a connecting rod is provided at the lower end of the rotating arm, wherein two adjacent rotating arms are hinged via the connecting rod.

[0013] Preferably, an electric telescopic cylinder is provided below the rotating arm, and a cylinder body of the electric telescopic cylinder is connected to the outer wall of the shell through a fixing frame, wherein the top end of the piston rod of the electric telescopic cylinder is hinged to the lower end of the rotating arm.

[0014] Preferably, the distance between two adjacent air inlet holes is 5 to 6 m, wherein a filter screen is provided on the air inlet hole.

[0015] Preferably, the height of the air supply holes is higher than the surface of the roadbed, and the distance between two adjacent air supply holes is 5 to 6 m.

[0016] Preferably, an inspection port is provided on a side of the air supply duct partition close to the air volume regulating valve, wherein a sealing door is installed at the inspection port.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the utility model opens induced air ducts connected with the air supply ducts on both sides of the tunnel, so that the induced air ducts guide and divert the airflow transported by the air supply ducts, wherein an air volume regulating valve is installed between the induced air ducts and the air supply ducts, so as to facilitate the adjustment of the air intake volume of the induced air ducts and achieve uniform distribution of the air volume, so that fresh air from the outside is sent into the tunnel through the air supply holes opened at the lower end of the induced air ducts, wherein the air supply holes are arranged at a height higher than the roadbed surface, and the height of the air supply holes is the same as the height of the automobile tail exhaust pipe from the roadbed, so as to facilitate the dilution of the automobile tail exhaust gas as soon as possible, accelerate air exchange, form a reasonable airflow organization with the exhaust, and effectively form air dilution, flow and exchange in the tunnel section, thereby greatly improving the ventilation effect in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a structural sectional view of the utility model;

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure at point A

[0021] Figure 4 It is a structural schematic diagram of the air volume regulating valve of the utility model.

[0022] Among them: 1. Roadbed; 2. Tunnel; 3. Air duct partition; 4. Air duct; 5. Air supply duct partition; 6. Air supply duct; 7. Air inlet; 8. Air volume regulating valve; 801. Shell; 802. Blade; 803. Rotating shaft; 804. Support seat; 805. Bearing; 806. Rotating arm; 807. Connecting rod; 808. Electric telescopic cylinder; 9. Filter; 10. Air supply hole; 11. Louvered exhaust grille; 12. Sealing partition; 13. Inspection port. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Please refer to Figures 1 to 4 To achieve the above purpose, the utility model provides the following technical solutions:

[0025] A new ventilation structure for a tunnel comprises a roadbed 1 and a tunnel 2, wherein the roadbed 1 is located below the tunnel 2; an air duct partition 3 is fixedly installed along the arc surface of the inner wall of the arched top of the tunnel 2, and the air duct partition 3 is lined with reinforced concrete, wherein both sides of the tunnel 2 expand outwards and form a cavity with the air duct partition 3; a plurality of sealing partitions 12 are arranged in the cavity, wherein one side of the sealing partition 12 is fixedly connected to the inner wall of the tunnel 2, and the other side of the sealing partition 12 is fixedly connected to the outer wall of the air duct partition 3, and the sealing partition 12 divides the cavity into a plurality of air ducts 4 with the same structure at equal intervals; an air supply duct partition 5 is arranged above the inner wall of the tunnel 2, and both sides of the air supply duct partition 5 are respectively fixedly connected to the inner wall of the air duct partition 3, wherein the air supply duct partition 5 and the air duct partition 3 form an air supply duct 6; the upper end of the air duct 4 is connected to the air supply duct 6, wherein the lower end of the air duct 4 is connected to the bottom of the main hole of the tunnel 2. By arranging an air supply duct 6 at the top of the tunnel 2, and opening a plurality of induced air ducts 4 connected with the air supply duct 6 on both sides of the tunnel 2, the induced air duct 4 can guide and divert the fresh air transported by the air supply duct 6, and by installing an air volume regulating valve 8 between the induced air duct 4 and the air supply duct 6 to adjust the size of the air intake of the induced air duct 4, the air volume can be evenly distributed, so that the fresh air from the outside can be sent into the main hole of the tunnel 2 through the air supply hole 10 opened at the lower end of the induced air duct 4, wherein the height of the air supply hole 10 is the same as the height of the automobile tail exhaust pipe from the roadbed 1, so as to dilute the automobile tail exhaust gas as soon as possible, accelerate air exchange, form a reasonable airflow organization with the exhaust, and effectively form air dilution, flow and exchange in the section of the tunnel 2, thereby greatly improving the ventilation effect in the main hole of the tunnel 2.

[0026] Please refer to Figure 2 , Figure 3As an embodiment of the utility model, an air inlet 7 is provided at the upper end of the air duct 4 near the air supply duct 6, and an air supply hole 10 is provided at the lower end of the air duct 4 near the main hole of the tunnel 2, wherein the air inlet 7 corresponds to the air supply hole 10 one by one; the air inlet 7 connects the air duct 4 and the air supply duct 6, wherein an air volume regulating valve 8 is installed in the air inlet 7, and the spacing between two adjacent air inlet holes 7 is 5 to 6m, wherein a filter screen 9 is installed on the side of the air inlet 7 near the air duct 4; the air supply hole 10 connects the air duct 4 and the main hole of the tunnel 2, wherein a louver exhaust grille 11 is installed in the air supply hole 10; the height of the air supply hole 10 is higher than the surface of the roadbed 1, wherein the spacing between two adjacent air supply holes 10 is 5 to 6m.

[0027] In the above-mentioned scheme, when full transverse ventilation is adopted, the distance between two adjacent air inlet holes 7 and two adjacent air supply holes 10 is 6m, and when semi-transverse ventilation is adopted, the distance between two adjacent air inlet holes 7 and two adjacent air supply holes 10 is 25m; this embodiment takes full transverse ventilation as an example, and the axial flow tunnel fan arranged at the entrance of the tunnel 2 is used to press the fresh air from the outside into the air supply duct 6, and an air inlet hole 7 and an air supply hole 10 are opened in the air duct 4 at intervals of 6m to ensure that the fresh air in the air supply duct 6 can be evenly discharged into the air duct 4 through the air inlet hole 7, and an air volume regulating valve 8 is installed in the air inlet hole 7 to adjust the size of the air volume of the air duct 4 to achieve uniform air volume distribution, so that the outside Fresh air is delivered into the main hole of the tunnel 2 through the air supply holes 10 opened at the lower end of the air duct 4. By installing an adjustable louver exhaust grille 11 in each air supply hole 10, it is ensured that the fresh air in the air duct 4 can be evenly discharged into the main hole of the tunnel 2 through the louver exhaust grille 11, wherein the installation height of the louver exhaust grille 11 is higher than the surface of the roadbed 1, and the height of the louver exhaust grille 11 is the same as the height of the automobile tail exhaust pipe from the roadbed 1, so that the fresh air evenly discharged into the main hole of the tunnel 2 through the louver exhaust grille 11 can quickly dilute the automobile tail exhaust gas, accelerate the air exchange in the main hole of the tunnel 2, form a reasonable airflow organization with the exhaust air, and greatly improve the ventilation effect in the main hole of the tunnel 2.

[0028] See also Figure 4As an embodiment of the utility model, the air volume regulating valve 8 includes a shell 801, wherein the shell 801 is fixedly connected to the inner wall of the air inlet hole 7; three sets of blades 802 are arranged in the shell 801, wherein the three sets of blades 802 form a circular sealing portion in the shell 801; a rotating shaft 803 is installed in the middle of each blade 802, wherein the two ends of the rotating shaft 803 respectively penetrate the shell 801 and extend outward; a support seat 804 is symmetrically installed on the outer wall of the shell 801, wherein the two ends of the rotating shaft 803 are respectively connected by bearings 80 5 is rotatably connected to the support base 804; one end of the rotating shaft 803 penetrates the support base 804 and extends outward, wherein the extended end of the rotating shaft 803 is fixedly connected to a rotating arm 806; a connecting rod 807 is provided at the lower end of the rotating arm 806, wherein two adjacent rotating arms 806 are hingedly connected through the connecting rod 807; an electric telescopic cylinder 808 is provided below the rotating arm 806, the cylinder body of the electric telescopic cylinder 808 is connected to the outer wall of the housing 801 through a fixing frame, wherein the top end of the piston rod of the electric telescopic cylinder 808 is hingedly connected to the lower end of the rotating arm 806.

[0029] In the above-described scheme, the piston rod is driven by the electric telescopic cylinder 808 to push the lower end of the rotating arm 806 to move, so that the rotating arm 806 drives the connecting rod 807 to move, so that the lower ends of the two adjacent rotating arms 806 move under the drive of the connecting rod 807, wherein during the movement of the lower end of the rotating arm 806, the upper end of the rotating arm 806 drives the rotating shaft 803 to rotate in the bearing 805, so that the blades 802 installed on the outer wall of the rotating shaft 803 rotate around the rotating shaft 803 as the axis, completing the opening and closing of the blades 802, thereby realizing the size adjustment of the air intake volume of the air duct 4, realizing the uniform distribution of the air volume, so that the fresh air from the outside is sent into the tunnel through the air supply hole 10 opened at the lower end of the air duct 4, thereby ensuring the uniformity of the air volume of the air supply hole 10.

[0030] See also Figure 1 As an embodiment of the utility model, an inspection port 13 is provided on the side of the air supply duct partition 5 close to the air volume regulating valve 8, wherein a sealing door is installed at the inspection port 13. The inspection port 13 is provided to facilitate staff to enter the air supply duct 6 to repair and inspect the air volume regulating valve 8.

[0031] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A novel ventilation structure for a tunnel, comprising a roadbed (1) and a tunnel (2), wherein the roadbed (1) is located below the tunnel (2); characterized in that: An air duct partition (3) is fixedly installed along the arc surface of the inner wall of the arched top of the tunnel (2), wherein both sides of the tunnel (2) expand outward and form a cavity with the air duct partition (3); a plurality of sealing partitions (12) are arranged in the cavity, wherein the sealing partitions (12) divide the cavity into a plurality of air ducts (4); an air supply duct partition (5) is arranged above the inner wall of the tunnel (2), wherein both sides of the air supply duct partition (5) are respectively fixedly connected to the inner wall of the air duct partition (3), wherein the air supply duct partition (5) and the air duct partition (3) form an air supply duct (6); the upper end of the air duct (4) is connected to the air supply duct (6), wherein the lower end of the air duct (4) is connected to the bottom of the tunnel (2).

2. A novel ventilation structure for tunnel according to claim 1, characterized in that: An air inlet hole (7) is provided at the upper end of the air duct (4) close to the air supply duct (6), and an air supply hole (10) is provided at the lower end of the air duct (4) close to the main hole of the tunnel (2), wherein the air inlet hole (7) corresponds to the air supply hole (10) one by one.

3. A novel ventilation structure for tunnel according to claim 2, characterized in that: The air inlet hole (7) is connected to the air inlet duct (4) and the air supply duct (6), wherein an air volume regulating valve (8) is installed in the air inlet hole (7).

4. A novel ventilation structure for tunnel according to claim 2, characterized in that: The air supply hole (10) is connected to the air duct (4) and the main hole of the tunnel (2), wherein a louvered exhaust grille (11) is installed in the air supply hole (10).

5. A novel ventilation structure for tunnel according to claim 3, characterized in that: The air volume regulating valve (8) comprises a shell (801), wherein the shell (801) is fixedly connected to the inner wall of the air inlet hole (7); three groups of blades (802) are arranged in the shell (801), wherein a rotating shaft (803) is installed in the middle of each blade (802), and the two ends of the rotating shaft (803) respectively penetrate the shell (801) and extend outward.

6. A novel ventilation structure for tunnel according to claim 5, characterized in that: A support seat (804) is symmetrically mounted on the outer side wall of the housing (801), wherein both ends of the rotating shaft (803) are rotatably connected to the support seat (804) via bearings (805) respectively.

7. A novel ventilation structure for tunnel according to claim 5, characterized in that: One end of the rotating shaft (803) passes through the support seat (804) and extends outward, wherein the extended end of the rotating shaft (803) is fixedly connected to a rotating arm (806); a connecting rod (807) is provided at the lower end of the rotating arm (806), wherein two adjacent rotating arms (806) are hingedly connected via the connecting rod (807).

8. A novel ventilation structure for tunnel according to claim 7, characterized in that: An electric telescopic cylinder (808) is provided below the rotating arm (806), and the cylinder body of the electric telescopic cylinder (808) is connected to the outer wall of the housing (801) via a fixing frame, wherein the top end of the piston rod of the electric telescopic cylinder (808) is hinged to the lower end of the rotating arm (806).

9. A novel ventilation structure for tunnel according to claim 2, characterized in that: The distance between two adjacent air inlet holes (7) is 5 to 6 m, wherein a filter screen (9) is provided on the air inlet hole (7); the height of the air supply hole (10) is higher than the surface of the roadbed (1), wherein the distance between two adjacent air supply holes (10) is 5 to 6 m.

10. A novel ventilation structure for tunnel according to claim 1, characterized in that: The air supply duct partition plate (5) is provided with an inspection opening (13) on one side close to the air volume regulating valve (8), wherein a sealing door is installed at the inspection opening (13).

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