A u-shaped air duct tunnel system for mitigating the effects of piston wind

Abstract

The utility model relates to a kind of U-shaped air duct tunnel systems for relieving the influence of piston wind, the system includes tunnel and the U-shaped channel of tunnel side face;U-shaped channel is located in the horizontal installation hole drilled in tunnel side face, and wind wheel central shaft is arranged horizontally in U-shaped channel, and multiple speed reduction wind wheels are uniformly arranged on wind wheel central shaft and are installed with transverse direction.The utility model is provided with multiple U-shaped air ducts on tunnel side wall, and the speed reduction wind wheels arranged inside are used to dissipate energy for piston wind, which can slow down the piston wind inside the tunnel, reduce environmental pollution, improve the air quality inside the tunnel, and improve the working environment of tunnel maintenance personnel.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering technology, specifically to a U-shaped ventilation tunnel system for mitigating the effects of piston wind. Background Technology

[0002] When trains frequently and rapidly pass through tunnels, the tunnels themselves, as well as the connecting cross passages between parallel tunnels, generate enormous, extremely high-speed piston-like winds. Field measurements have shown that at a train speed of 120 km / h, the wind pressure on the door frame walls of the cross passages can reach 1600-2000 Pa, approaching a force 15 to 16 gale-force wind. Such high wind speeds often result in large amounts of dust being frequently ejected from the tunnel entrances. Coal tunnels, in particular, frequently emit fine coal dust from their entrances, causing significant air pollution.

[0003] Therefore, it is necessary to propose new measures to overcome the above-mentioned shortcomings. Summary of the Invention

[0004] The purpose of this invention is to provide a U-shaped ventilation tunnel system to mitigate the impact of piston wind, thereby solving the problem of piston wind deceleration within the tunnel.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A U-shaped ventilation tunnel system for mitigating the effects of piston wind is provided, the system comprising a tunnel and a U-shaped passage on the side of the tunnel;

[0007] The U-shaped channel is located in a horizontally installed hole drilled in the side of the tunnel. A horizontally arranged wind turbine shaft is provided in the U-shaped channel, and multiple horizontally evenly arranged deceleration wind turbines are installed on the wind turbine shaft.

[0008] Furthermore, the U-shaped channel includes a horizontal first air duct, a horizontal second air duct, and a vertical connecting pipe;

[0009] The first duct and the second duct are arranged vertically, and their outer ends are connected by the vertical connecting pipe.

[0010] Furthermore, the inner ends of both the first and second air ducts are connected to the tunnel, serving as the first piston air inlet and the second piston air inlet, respectively.

[0011] Furthermore, the central shaft of the wind turbine is located inside the first air duct and the second air duct, and the outer end of the central shaft of the wind turbine is connected to the inner wall of the vertical connecting pipe.

[0012] Furthermore, the inner walls of the first and second air ducts are provided with circumferential bosses, namely deceleration rings.

[0013] Furthermore, the deceleration ring has a triangular cross-section, with the side of the deceleration ring closer to the tunnel being a vertical surface and the side of the deceleration ring farther from the tunnel being an oblique surface.

[0014] Furthermore, the U-shaped channels are arranged in longitudinal rows evenly on the sides of the tunnel.

[0015] Furthermore, the U-shaped passages are arranged in at least two rows on the side of the tunnel.

[0016] Furthermore, the U-shaped passages are symmetrically arranged on both sides of the tunnel.

[0017] Furthermore, within the first and second air ducts, at least three wind turbines are arranged longitudinally along the central axis.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention provides a U-shaped ventilation tunnel system to mitigate the impact of piston wind. Multiple U-shaped ventilation ducts are set in the tunnel sidewall, and the deceleration impellers installed inside the ventilation ducts consume energy from the piston wind. This system can decelerate the piston wind of a train inside the tunnel, reduce environmental pollution, improve the air quality inside the tunnel, and improve the working environment for tunnel maintenance personnel. Attached Figure Description

[0020] 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 embodiments can be obtained from these drawings without creative effort.

[0021] Figure 1 This is the elevation layout diagram of this utility model.

[0022] Figure 2 This is a side view of the present invention.

[0023] Figure 3 This is a structural diagram of a U-shaped channel.

[0024] Figure 4 This is a plan view of the speed-reducing wind turbine.

[0025] Figure 5 This is a three-dimensional structural diagram of the speed-reducing wind turbine.

[0026] Figure 6 This is a diagram of the U-shaped tube structure of a U-shaped deceleration channel.

[0027] The diagram is labeled as follows:

[0028] 1-Tunnel, 2-U-shaped passage, 3-Installation hole, 4-First piston air inlet, 5-Second piston air inlet;

[0029] 21-Reduction impeller, 22-Impeller central shaft, 23-First air duct, 24-Second air duct, 25-Vertical connecting pipe, 26-Reduction ring. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0034] It should also be noted that although the order of steps is mentioned in the method description, in some cases, steps may be performed in a different order than that described here, and this should not be interpreted as a restriction on the order of steps.

[0035] In a specific implementation, the tunnel line direction is defined as longitudinal, the direction perpendicular to it is defined as transverse, the direction closer to the tunnel centerline is defined as the inner side, and the direction farther from the tunnel centerline is defined as the outer side.

[0036] This invention provides a U-shaped ventilation tunnel system to mitigate the effects of piston wind. Based on the existing tunnel structure, wind energy deceleration and collection devices are installed on its sides to reduce the impact of piston wind, effectively lowering the wind speed and preventing dust from escaping from the tunnel entrance. Figure 1 The system includes a tunnel 1 and a U-shaped channel 2 on the side of the tunnel 1. The U-shaped channel 2 is a wind energy deceleration and collection device installed on the side of the tunnel 1, located in a horizontal installation hole 3 drilled on the side of the tunnel 1. A horizontally arranged wind turbine shaft 22 is installed in the U-shaped channel 2, and multiple deceleration wind turbines 21 are installed on the wind turbine shaft 22 in a horizontally uniform manner.

[0037] Specifically, such as Figure 3 The U-shaped channel 2 includes a horizontal first air duct 23, a horizontal second air duct 24, and a vertical connecting pipe 25. The first air duct 23 and the second air duct 24 are arranged vertically, and their outer ends are connected by the vertical connecting pipe 25, forming a U-shaped cross-section. The inner ends of both the first air duct 23 and the second air duct 24 are connected to the tunnel 1, respectively, as the first piston air inlet 4 and the second piston air inlet 5. The impeller shaft 22 is located inside the first air duct 23 and the second air duct 24, and its outer end is connected to the inner wall of the vertical connecting pipe 25.

[0038] In addition, such as Figure 6 The inner walls of the first air duct 23 and the second air duct 24 are provided with circumferential protrusions, namely deceleration rings 26. The cross-section of the deceleration ring 26 is triangular, with the side of the deceleration ring 26 closer to the tunnel 1 being a vertical surface and the side of the deceleration ring 26 further away from the tunnel 1 being an inclined surface.

[0039] like Figure 1 and Figure 2 The U-shaped channels 2 are evenly arranged longitudinally on the side of tunnel 1, and the number can be determined according to the tunnel length and actual needs. At least two rows of U-shaped channels 2 are arranged vertically on the side of tunnel 1, and symmetrically arranged left and right on both sides of tunnel 1. At least three wind turbine shafts 22 are arranged longitudinally within the first air duct 23 and the second air duct 24. In some embodiments, the U-shaped channels 2 can be installed with a vertical spacing of 1.5 meters and a front-to-back spacing of 1.5 meters; of course, the spacing can be adjusted according to actual needs.

[0040] like Figure 2In some embodiments, the ducts of the U-shaped channel 2 can be made of square tubing with a rectangular cross-section. The first duct 23, the second duct 24, and the vertical connecting pipe 25 are all square tubing. Connecting plates can also be installed on the longitudinal front and rear sides of the first duct 23 and the second duct 24 to form a whole. When using the square tubing scheme, the U-shaped channel 2 can be assembled by welding steel plates and then inserted into the installation holes 3 after arriving at the site. The inner end of the U-shaped channel 2 is flush with the inner wall of the tunnel and can be firmly fixed with expansion bolts or pre-embedded steel bars. Necessary grouting treatment is applied to the gaps.

[0041] like Figure 4 and Figure 5 The deceleration impeller 21 is mounted on the central shaft 22 of the impeller and can be installed via bearings. When the train enters, the piston wind can be dispersed into the first air pipe 23 and the second air pipe 24, acting on the deceleration impeller 21 to make it rotate, thereby consuming the energy of the piston wind and achieving the purpose of reducing the piston wind pressure and wind speed.

[0042] The specific construction process of this utility model is as follows:

[0043] Step 1: During the construction window of the train, dig horizontal installation holes 3 at the corresponding positions on the side wall of tunnel 1.

[0044] Step 2: Insert the assembled U-shaped channel 2 into the pre-drilled installation hole 3, and fix and adjust it accordingly.

[0045] Step 3: Smooth the gap between U-shaped passage 2 and the existing tunnel sidewall with M15 polymer cement mortar to complete the construction.

[0046] This utility model is applicable to national railway, high-speed railway tunnels, municipal tunnels, etc. It can reduce the speed and pressure of train piston wind inside the tunnel, effectively solve the problem of excessively high train piston wind speed and pressure during train operation, reduce tunnel pollution to the surrounding environment, improve air quality inside the tunnel, and improve the working environment of tunnel maintenance personnel.

[0047] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A U-shaped ventilation tunnel system for mitigating the effects of piston wind, characterized in that: The system includes a tunnel (1) and a U-shaped passage (2) on the side of the tunnel (1); The U-shaped channel (2) is located in the horizontal installation hole (3) chiseled on the side of the tunnel (1). A horizontally arranged wind turbine shaft (22) is provided in the U-shaped channel (2). Multiple horizontally evenly arranged deceleration wind turbines (21) are installed on the wind turbine shaft (22).

2. The U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 1, characterized in that: The U-shaped channel (2) includes a horizontal first air duct (23), a horizontal second air duct (24), and a vertical connecting pipe (25); The first air duct (23) and the second air duct (24) are arranged vertically, and the outer ends of the first air duct (23) and the second air duct (24) are connected through the vertical connecting pipe (25).

3. The U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 2, characterized in that: The inner ends of the first air duct (23) and the second air duct (24) are both connected to the tunnel (1), which are the first piston air inlet (4) and the second piston air inlet (5), respectively.

4. The U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 3, characterized in that: The wind turbine shaft (22) is located inside the first air duct (23) and the second air duct (24), and the outer end of the wind turbine shaft (22) is connected to the inner wall of the vertical connecting pipe (25).

5. The U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 4, characterized in that: The inner walls of the first air duct (23) and the second air duct (24) are provided with circumferential bosses, namely deceleration rings (26).

6. The U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 5, characterized in that: The deceleration ring (26) has a triangular cross-section. The side of the deceleration ring (26) closest to the tunnel (1) is a vertical surface, and the side of the deceleration ring (26) furthest from the tunnel (1) is an oblique surface.

7. A U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 6, characterized in that: The U-shaped channels (2) are arranged in a longitudinal row on the side of the tunnel (1).

8. The U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 7, characterized in that: The U-shaped passage (2) is arranged in at least two columns on the side of the tunnel (1).

9. A U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 8, characterized in that: The U-shaped passage (2) is symmetrically arranged on both sides of the tunnel (1).

10. A U-shaped ventilation tunnel system for mitigating the effects of piston wind according to claim 9, characterized in that: Inside the first air duct (23) and the second air duct (24), at least three wind turbine shafts (22) are arranged longitudinally.

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