Tunnel auxiliary device

Abstract

The invention relates to a tunnel auxiliary device. The tunnel auxiliary device comprises a main body, a pressure relief assembly and a dust control assembly. The body is used for being arranged at a tunnel entrance and provided with a flow guide channel used for being communicated with a tunnel. The pressure relief assembly comprises a pressure relief hole and an adjusting plate, the pressure relief hole is formed in the side wall of the flow guide channel, the adjusting plate is connected with the main body, the adjusting plate is configured to operably move so as to be switched between a first position and a second position, when the adjusting plate is located at the first position, the adjusting plate blocks the pressure relief hole, and when the adjusting plate is located at the second position, the adjusting plate blocks the pressure relief hole. The flow guide channel can be communicated with the outside through the pressure relief hole; the dust control assembly comprises a dustproof layer, and the dustproof layer is arranged on the main body in a sleeving mode and arranged to be located at the end close to the tunnel entrance. The pressure relief hole communicated with the outside is formed in the side wall of the flow guide channel so as to relieve pressure, and when the train is far away from the flow guide channel, the adjusting plate can be located at the first position to block the pressure relief hole, so that noise transmission can be reduced, and noise pollution to the external environment is reduced.

Description

Technical Field

[0001] This application relates to the field of tunnel technology, and in particular to tunnel auxiliary devices. Background Technology

[0002] Piston wind occurs because when a heavy-haul railway train enters a tunnel, the air in front of the train is compressed, increasing its own pressure and thus compressing the airflow. Meanwhile, as the rear of the train enters the tunnel, a negative pressure is created behind it, forming an expanding airflow, which becomes piston wind.

[0003] The surface layer of coal inside heavy-haul railway train carriages is repeatedly blown by expanding and compressing airflows within tunnels, generating large amounts of airflow containing coal dust, which pollutes the external environment. To address this, existing technologies install pressure relief and dust control devices before tunnel entrances to reduce environmental pollution. However, these devices have poor sound insulation, producing significant noise pollution as trains pass over them. Summary of the Invention

[0004] Therefore, it is necessary to provide a tunnel auxiliary device to address the problem that existing pressure relief and dust control devices have poor sound insulation and generate loud noise when trains pass through them.

[0005] A tunnel assist device, the tunnel assist device comprising:

[0006] A main body is provided for installation at the tunnel entrance, and the main body is provided with a flow guiding channel for communicating with the tunnel;

[0007] A pressure relief assembly includes a pressure relief hole and an adjusting plate. The pressure relief hole is disposed on the side wall of the flow guiding channel. The adjusting plate is connected to the main body and is configured to be operablely movable to switch between a first position and a second position. When the adjusting plate is in the first position, it blocks the pressure relief hole. When the adjusting plate is in the second position, the flow guiding channel is connected to the outside through the pressure relief hole.

[0008] A dust control component, comprising a dustproof layer, which is fitted onto the main body and configured to be located at one end near the tunnel entrance. The dustproof layer has a plurality of spaced dust collection holes, and each dust collection hole is provided with a dust collection net.

[0009] In one embodiment, when the adjusting plate is in the second position, a portion of the adjusting plate extends into the flow channel via the pressure relief hole.

[0010] In one embodiment, the pressure relief assembly further includes an elastic element and a rotating shaft. The rotating shaft is rotatably connected to the main body and to the adjusting plate. The elastic element is sleeved on the rotating shaft, with one end abutting against the main body and the other end abutting against the adjusting plate. The elastic element is used to apply a force to the adjusting plate to switch from the second position to the first position. The adjusting plate is configured to rotate around the axis of the rotating shaft under the action of air pressure in the flow channel, so as to rotate from the first position to the second position.

[0011] In one embodiment, the tunnel auxiliary device further includes an impeller and an energy converter. The impeller is installed in the pressure relief hole and located on the side of the regulating plate away from the flow channel. The impeller is electrically connected to the energy converter. The impeller is used to rotate when the air pressure is discharged to the outside through the pressure relief hole, so as to transfer kinetic energy to the energy converter for power generation.

[0012] In one embodiment, the dust control component further includes a dustproof net, which is sleeved on the main body and disposed between the dustproof layer and the main body, with both ends of the dustproof layer connected to the dustproof layer and the main body, respectively.

[0013] In one embodiment, the dustproof net includes a first trapping net, a second trapping net, and a third trapping net arranged sequentially along the direction of train travel, wherein the aperture of the first trapping net, the second trapping net, and the third trapping net decreases sequentially.

[0014] In one embodiment, the first trapping net is a metal mesh; and / or, the second trapping net is an electrostatic adsorption net; and / or, the third trapping net is a porous ceramic mesh.

[0015] In one embodiment, the dust control assembly further includes a flushing component, which includes a rotating arm and a nozzle. One end of the rotating arm is connected to the nozzle, and the other end of the rotating arm is connected to the main body or the dustproof layer. The rotating arm can drive the nozzle to rotate so that the nozzle sprays water mist toward the dustproof net to flush the dustproof net.

[0016] In one embodiment, the tunnel assist device further includes a resonator disposed between the main body and the dustproof layer, the resonator being used for noise reduction.

[0017] In one embodiment, there are multiple pressure relief holes, and each pressure relief hole is spaced apart on opposite side walls of the flow guide channel along the extension direction of the flow guide channel.

[0018] In the extension direction of the flow channel, at least one flow guide plate is provided between any two adjacent pressure relief holes, and each flow guide plate is inclined toward the tunnel entrance end face.

[0019] Beneficial effects:

[0020] The tunnel auxiliary device provided in this application includes a main body, a pressure relief component, and a dust control component. The main body is installed at the tunnel entrance and has a flow channel for communicating with the tunnel. The pressure relief component includes a pressure relief hole and an adjusting plate. The pressure relief hole is located on the side wall of the flow channel. The adjusting plate is connected to the main body and is configured to be operablely movable to switch between a first position and a second position. When the adjusting plate is in the first position, it blocks the pressure relief hole. When the adjusting plate is in the second position, the flow channel can communicate with the outside through the pressure relief hole. The dust control component includes a dustproof layer, which is fitted onto the main body and is configured to be located at one end near the tunnel entrance. The dustproof layer has multiple spaced dust collection holes, and each dust collection hole has a dust collection net. This application establishes a connecting guide channel in front of the tunnel entrance, causing a piston-like airflow to be generated within the channel when the train enters the tunnel. Pressure relief holes connected to the outside are located on the side walls of the guide channel to relieve pressure, thereby actively reducing the pressure difference between the positive pressure airflow and the tunnel air. This prevents impact dust pollution from the train entering the tunnel. Furthermore, a dustproof layer is installed to capture coal dust particles discharged through the pressure relief holes, achieving dust control. When the train moves away from the guide channel, the adjusting plate can be positioned in the first position to block the pressure relief holes, thereby reducing noise transmission and further minimizing noise pollution to the external environment. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the tunnel auxiliary device provided in an embodiment of this application from the front view direction.

[0022] Figure 2 This is a top-view cross-sectional view of a tunnel auxiliary device provided in an embodiment of this application.

[0023] Figure 3 A cross-sectional view of the tunnel auxiliary device provided in an embodiment of this application from the left view direction.

[0024] Figure 4 This is a diagram showing the arrangement of guide vanes in a tunnel auxiliary device provided in one embodiment of this application.

[0025] Figure 5 A cross-sectional view of the pressure relief component in a tunnel auxiliary device provided in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of a pressure relief component in a tunnel auxiliary device provided in an embodiment of this application.

[0027] Icon labels:

[0028] 100-Main body; 110-Guide channel; 120-Gradual section; 130-Flat section; 200-Pressure relief component; 210-Pressure relief hole; 220-Adjusting plate; 230-Elastic component; 240-Rotating shaft; 250-Impeller; 300-Dust control component; 310-Dustproof layer; 320-Dustproof net; 321-First collection net; 322-Second collection net; 323-Third collection net; 330-Scrubbing component; 340-Resonator; 350-Atomizing component; 410-Guide plate; 420-Wind speed detection component; 430-Dust concentration detection component; 500-Tunnel entrance; 600-Train. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a cross-sectional view of the tunnel auxiliary device provided in an embodiment of this application from the front view direction. Figure 2 This is a top-view cross-sectional view of a tunnel auxiliary device provided in an embodiment of this application. Figure 3This is a cross-sectional view from the left side of an embodiment of the tunnel auxiliary device provided in this application. The tunnel auxiliary device provided in an embodiment of this application includes a main body 100, a pressure relief assembly 200, and a dust control assembly 300. The main body 100 is disposed at a tunnel entrance 500 and has a flow guide channel 110 for communicating with the tunnel. The pressure relief assembly 200 includes a pressure relief hole 210 and an adjusting plate 220. The pressure relief hole 210 is disposed on the side wall of the flow guide channel 110. The adjusting plate 220 is connected to the main body 100 and is configured to be operablely movable. Switching between the first and second positions, when the adjusting plate 220 is in the first position, the adjusting plate 220 blocks the pressure relief hole 210. When the adjusting plate 220 is in the second position, the flow channel 110 can be connected to the outside through the pressure relief hole 210. The dust control component 300 includes a dustproof layer 310, which is sleeved on the main body 100 and is configured to be located at one end near the tunnel entrance 500. The dustproof layer 310 is provided with a plurality of spaced dust collection holes, and each dust collection hole is provided with a dust collection net.

[0036] Specifically, this application establishes a connecting guide channel 110 in front of the tunnel entrance 500, so that when the train 600 enters the tunnel, a piston wind is generated in the guide channel 110. The guide channel 110 has a pressure relief hole 210 on its side wall that communicates with the outside, so as to relieve pressure and actively reduce the pressure difference between the positive pressure wind and the tunnel air. This avoids the impact dust pollution generated by the train 600 when entering the tunnel. The dustproof layer 310 can capture the coal dust particles discharged through the pressure relief hole 210 to achieve dust control. When the train 600 moves away from the guide channel 110, the adjusting plate 220 can be in the first position to block the pressure relief hole 210, thereby reducing the transmission of noise and further reducing noise pollution to the external environment.

[0037] It should be noted that if no tunnel auxiliary device is installed in front of the tunnel entrance 500, the train 600 will generate a piston-like airflow near the tunnel entrance 500, impacting the coal on the train 600. This causes airflow containing a large amount of coal dust to be introduced into the tunnel, affecting the work of workers inside the tunnel and polluting the environment. The tunnel auxiliary device in this application enables the train 600 to generate a piston-like airflow in advance, reducing the amount of coal dust entering the tunnel, and controlling dust through the dustproof layer 310, thereby reducing environmental pollution.

[0038] Furthermore, the end face of the flow guide channel 110 is connected to the end face of the tunnel entrance 500, so that during the flow of air in the flow guide channel 110, coal dust can be prevented from escaping directly to the outside through the tunnel auxiliary device and the tunnel entrance 500. The dustproof layer 310 is connected to the main body 100 on both sides to prevent coal dust from escaping through the gap between the dustproof layer 310 and the main body 100.

[0039] See Figure 1 , Figure 2 and Figure 3 In one embodiment, the tunnel auxiliary device further includes a wind speed detection element 420, a controller, and an atomizing element 350. Both the wind speed detection element 420 and the atomizing element 350 are installed in the flow channel 110 and are electrically connected to the controller. The wind speed detection element 420 is used to detect the wind speed in the flow channel 110 and transmit the wind speed information to the controller. The controller controls the atomizing element 350 to spray in the flow channel 110 according to the wind speed information.

[0040] Specifically, when the train 600 approaches the guide channel 110, the wind speed within the guide channel 110 increases and reaches a preset value. The controller then controls the atomizing element 350 to spray water into the guide channel 110, thereby pre-humidifying the internal air and allowing coal dust particles to better combine with the water mist, reducing dust pollution. When the train 600 leaves the guide channel 110 and the wind speed within the guide channel 110 stabilizes, the controller controls the atomizing element 350 to shut off. Multiple atomizing elements 350 can be used, each spaced apart on the inner wall of the guide channel 110. The spray from each atomizing element 350 contains a dust suppressant, and the spray volume can be adjusted based on wind speed information. Preferably, the wind speed detection element 420 is a wind speed sensor.

[0041] Furthermore, the tunnel auxiliary device also includes a dust concentration detection element 430. The dust concentration detection element 430 is installed on the inner wall of the flow channel 110 and electrically connected to the controller. The dust concentration detection element 430 is used to detect the dust concentration within the flow channel 110 and transmit the dust concentration information to the controller. The controller controls the opening or closing of the atomizing element 350 based on the wind speed information and the dust concentration information. Preferably, the dust concentration detection element 430 is a dust concentration sensor.

[0042] See Figure 1 , Figure 2 and Figure 3 In one embodiment, the flow guiding channel 110 includes consecutive tapering sections 120 and flush sections 130. In the direction of travel of the train 600, the radial dimension of the tapering section 120 gradually decreases, while the radial dimension of the flush section 130 remains the same and is connected to the end face of the tunnel entrance 500. Through the arrangement of the tapering section 120 and the flush section 130, the originally chaotic airflow at the front of the train 600 gradually transforms into a gradual flow, and further into a uniform flow, thereby rectifying and constraining the "piston wind" flowing into the tunnel. The dustproof layer 310 is fitted onto the flush section 130, and the cross-section of the flush section 130 is identical to the tunnel cross-section.

[0043] See Figure 1 , Figure 2 and Figure 3 In one embodiment, there are multiple pressure relief holes 210, and each pressure relief hole 210 is spaced apart on opposite side walls of the guide channel 110 along the extension direction of the guide channel 110, thereby further facilitating the outlet of air pressure in the guide channel 110 to the outside.

[0044] Furthermore, in the direction of travel of the train 600, the size of the pressure relief hole 210 corresponding to the level section 130 gradually decreases, thereby gradually reducing the amount of airflow discharged through the pressure relief hole 210, improving airflow stability, and thus reducing the impact when the train 600 enters the tunnel.

[0045] For example, the pressure relief hole 210 corresponding to the tapering section 120 adopts a fixed large diameter structure of 3m×2m to quickly release the initial positive pressure air, and the size of the pressure relief hole 210 corresponding to the level section 130 gradually decreases from 2m×1.5m to 0.7m×0.5m.

[0046] See Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 4 This is a diagram showing the arrangement of guide plates in a tunnel auxiliary device according to an embodiment of this application. In one embodiment, at least one guide plate 410 is provided between any two adjacent pressure relief holes 210 in the extending direction of the guide channel 110, and each guide plate 410 is inclined toward the tunnel entrance 500 end face, thereby guiding the airflow to converge toward the center, and can cooperate with the flush section 130 to transform the airflow into a uniform flow, further improving the airflow stability.

[0047] Furthermore, in the direction of train 600 travel, the angle between the inclination of each guide vane 410 and the inner wall of the guide channel 110 gradually decreases, thereby gradually guiding the airflow to converge towards the center and improving airflow stability.

[0048] For example, the guide vane 410 corresponding to the front section of the tapering section 120 forms a 45° angle with the inner wall of the guide channel 110 to disperse the initial impact airflow; the angle between the guide vane 410 corresponding to the front section of the level section 130 and the inner wall of the guide channel 110 decreases to 30° to guide the airflow to converge towards the center; the angle between the guide vane 410 corresponding to the rear section of the level section 130 and the inner wall of the guide channel 110 gradually changes to 15°, which, together with the level section 130, transforms the airflow into a uniform flow.

[0049] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In one embodiment, the windward side of the deflector 410 is provided with grooves, which are filled with slow-release dust suppressant. When it comes into contact with water mist, it forms an adhesive layer, which enhances the ability to adsorb and capture dust.

[0050] See Figure 1 , Figure 2 and Figure 3 In one embodiment, when the adjusting plate 220 is in the second position, a portion of the adjusting plate 220 extends into the flow channel 110 via the pressure relief hole 210.

[0051] Specifically, when there is wind pressure within the flow channel 110, the regulating plate 220 is positioned in the second position, with a gap between the regulating plate 220 and the wall of the pressure relief hole 210, allowing the pressure relief hole 210 to be opened and the flow channel 110 to be depressurized. When the wind pressure within the flow channel 110 tends to stabilize, the regulating plate 220 is positioned in the first position, thereby sealing the pressure relief hole 210 and reducing noise transmission. When the regulating plate 220 is in the second position, a portion of the regulating plate 220 extends into the flow channel 110 through the pressure relief hole 210, thus blocking the wind and effectively buffering the positive pressure impact airflow to reduce wind pressure.

[0052] See Figure 1 , Figure 3 and Figure 5 , Figure 5 This is a cross-sectional view of a pressure relief assembly in a tunnel auxiliary device provided in one embodiment of this application. In one embodiment, the pressure relief assembly 200 further includes an elastic element 230 and a rotating shaft 240. The rotating shaft 240 is rotatably connected to the main body 100 and connected to an adjusting plate 220. The elastic element 230 is sleeved on the rotating shaft 240, with one end of the elastic element 230 abutting against the main body 100 and the other end abutting against the adjusting plate 220. The elastic element 230 is used to apply a force to the adjusting plate 220 to switch from a second position to a first position. The adjusting plate 220 is configured to rotate around the axis of the rotating shaft 240 under the action of air pressure in the flow channel 110, so as to rotate from the first position to the second position.

[0053] Specifically, when the air pressure inside the flow channel 110 is stable, the adjusting plate 220, under the action of the elastic element 230, is stably positioned in the first position, thereby stably sealing the pressure relief hole 210 and reducing the transmission of noise from the flow channel 110. When the air pressure inside the flow channel 110 increases, a pressure difference is formed between the air pressure inside the flow channel 110 and the external air pressure, thereby applying a driving force towards the outside to the adjusting plate 220, causing the adjusting plate 220 to rotate around the axis of the rotating shaft 240, so that there is a gap between it and the wall of the pressure relief hole 210, i.e., rotating to the second position, so that the air pressure inside the flow channel 110 can be discharged to the outside. Preferably, the elastic element 230 is a torsion spring.

[0054] It should be noted that the second position in this application does not refer to just one position. As long as there is a gap between the adjusting plate 220 and the wall of the pressure relief hole 210, the adjusting plate 220 is considered to be in the second position.

[0055] Furthermore, each pressure relief hole 210 has multiple corresponding adjusting plates 220, which are arranged sequentially within the pressure relief hole 210. This reduces the size of each adjusting plate 220 extending into the guide channel 110 when it is in the second position, thereby reducing the force exerted on the portion of each adjusting plate 220 within the guide channel 110 and ensuring its stable position in the second position. The arrangement of multiple adjusting plates 220 corresponding to each pressure relief hole 210 also gradually blocks wind pressure, effectively buffering the positive pressure impact of the airflow.

[0056] See Figure 1 , Figure 3 , Figure 5 and Figure 6 , Figure 6 This is a schematic diagram of a pressure relief component in a tunnel auxiliary device provided in one embodiment of this application. In one embodiment, the tunnel auxiliary device further includes an impeller 250 and an energy converter. The impeller 250 is installed in the pressure relief hole 210 and is located on the side of the regulating plate 220 away from the guide channel 110. The impeller 250 is electrically connected to the energy converter. The impeller 250 is used to rotate when the air pressure is discharged to the outside through the pressure relief hole 210, so as to transfer kinetic energy to the energy converter for power generation, thereby providing power to the controller, wind speed sensor, dust concentration sensor, etc.

[0057] See Figure 1 , Figure 3 , Figure 5 and Figure 6 In another embodiment, the pressure relief assembly 200 further includes a drive member, which is connected to the rotating shaft 240 and electrically connected to the controller. The controller controls the drive member according to the wind speed information to control the rotation of the adjustment plate 220, thereby allowing the adjustment plate 220 to switch between a first position and a second position. It can also automatically control the angle of the adjustment plate 220 relative to the pressure relief hole 210 according to the wind speed information to adjust the gap between the adjustment plate 220 and the hole wall of the pressure relief hole 210, thereby improving the reliability of pressure relief.

[0058] See Figure 1 In one embodiment, the tunnel auxiliary device further includes a resonator 340, which is disposed between the main body 100 and the dustproof layer 310. The resonator 340 is used to reduce noise, thereby effectively isolating the noise emitted by the train 600 when passing through the tunnel. Preferably, the resonator 340 is a Helmholtz resonator.

[0059] Furthermore, the dust control layer is a noise reduction plate, specifically a composite dust-blocking layer consisting of a noise reduction plate and a Helmholtz resonator, which can more effectively isolate the noise emitted by the train 600 when passing through the tunnel. Preferably, the dust control layer is a dynamic noise reduction plate.

[0060] See Figure 1 and Figure 2 In one embodiment, the dust control component 300 further includes a dustproof net 320, which is sleeved on the main body 100 and disposed between the dustproof layer 310 and the main body 100, and the two ends of the dustproof layer 310 are respectively connected to the dustproof layer 310 and the main body 100.

[0061] Specifically, the airflow discharged through the pressure relief hole 210 is partially discharged to the outside through the dust collection hole, while the remaining portion moves between the dustproof layer 310 and the main body 100 in the direction of train 600 travel. The dustproof net 320 captures coal dust in the airflow between the dustproof layer 310 and the main body 100, further achieving dust control. Multiple dustproof nets 320 are provided, spaced apart along the direction of train 600 travel, so that they can each capture coal dust in the airflow discharged from their respective pressure relief hole 210.

[0062] See Figure 1 and Figure 2 In one embodiment, the dustproof net 320 includes a first trapping net 321, a second trapping net 322 and a third trapping net 323 arranged sequentially along the forward direction of the train 600. The apertures of the first trapping net 321, the second trapping net 322 and the third trapping net 323 decrease sequentially, thereby enabling step-by-step trapping and avoiding blockage.

[0063] See Figure 1 and Figure 2 In one embodiment, the first collecting net 321 is a metal mesh, which is capable of intercepting large particles of coal dust. Exemplarily, the aperture of the first collecting net 321 is 5 mm.

[0064] In one embodiment, the second collecting net 322 is an electrostatic adsorption net, which is capable of capturing fine dust by electrostatic adsorption. Exemplarily, the pore size of the second collecting net 322 is 1 μm.

[0065] In one embodiment, the third trapping mesh 323 is a porous ceramic mesh, which is capable of degrading adsorbed organic pollutants. The surface of the third trapping mesh 323 is coated with a photocatalytic titanium dioxide coating.

[0066] See Figure 1 and Figure 2In one embodiment, the dust control assembly 300 further includes a flushing component 330, which includes a rotating arm and a nozzle. One end of the rotating arm is connected to the nozzle, and the other end of the rotating arm is connected to the main body 100 or the dustproof layer 310. The rotating arm can drive the nozzle to rotate so that the nozzle sprays water mist toward the dustproof net 320 to flush the dustproof net 320, thereby cleaning the first collection net 321, the second collection net 322 and the third collection net 323 and avoiding clogging.

[0067] Each dustproof net 320 has a corresponding flushing component 330. Each flushing component 330 can be set between the corresponding first collection net 321 and second collection net 322, or between the corresponding second collection net 322 and third collection net 323, or set on one side of the dustproof net 320.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A tunnel auxiliary device, characterized in that, The tunnel auxiliary device includes: A main body is provided for installation at the tunnel entrance, and the main body is provided with a flow guiding channel for communicating with the tunnel; A pressure relief assembly includes a pressure relief hole and an adjusting plate. The pressure relief hole is disposed on the side wall of the flow guiding channel. The adjusting plate is connected to the main body and is configured to be operablely movable to switch between a first position and a second position. When the adjusting plate is in the first position, it blocks the pressure relief hole. When the adjusting plate is in the second position, the flow guiding channel is connected to the outside through the pressure relief hole. A dust control component, comprising a dustproof layer, which is fitted onto the main body and configured to be located at one end near the tunnel entrance. The dustproof layer has a plurality of spaced dust collection holes, and each dust collection hole is provided with a dust collection net.

2. The tunnel auxiliary device according to claim 1, characterized in that, When the adjusting plate is in the second position, part of the adjusting plate extends into the flow channel through the pressure relief hole.

3. The tunnel auxiliary device according to claim 1, characterized in that, The pressure relief assembly further includes an elastic element and a rotating shaft. The rotating shaft is rotatably connected to the main body and to the adjusting plate. The elastic element is sleeved on the rotating shaft, with one end of the elastic element abutting against the main body and the other end abutting against the adjusting plate. The elastic element is used to apply a force to the adjusting plate to switch from the second position to the first position. The adjusting plate is configured to rotate around the axis of the rotating shaft under the action of air pressure in the flow channel, so as to rotate from the first position to the second position.

4. The tunnel auxiliary device according to claim 1, characterized in that, The tunnel auxiliary device also includes an impeller and an energy converter. The impeller is installed in the pressure relief hole and is located on the side of the regulating plate away from the flow channel. The impeller is electrically connected to the energy converter. The impeller is used to rotate when the air pressure is discharged to the outside through the pressure relief hole, so as to transfer kinetic energy to the energy converter for power generation.

5. The tunnel auxiliary device according to any one of claims 1-4, characterized in that, The dust control component also includes a dustproof net, which is sleeved on the main body and disposed between the dustproof layer and the main body, and both ends of the dustproof layer are respectively connected to the dustproof layer and the main body.

6. The tunnel auxiliary device according to claim 5, characterized in that, The dustproof net includes a first trapping net, a second trapping net, and a third trapping net arranged sequentially along the direction of train travel, with the aperture of the first trapping net, the second trapping net, and the third trapping net decreasing sequentially.

7. The tunnel auxiliary device according to claim 6, characterized in that, The first collecting net is a metal mesh; and / or, the second collecting net is an electrostatic adsorption net; and / or, the third collecting net is a porous ceramic mesh.

8. The tunnel auxiliary device according to claim 5, characterized in that, The dust control assembly also includes a flushing component, which includes a rotating arm and a nozzle. One end of the rotating arm is connected to the nozzle, and the other end of the rotating arm is connected to the main body or the dustproof layer. The rotating arm can drive the nozzle to rotate so that the nozzle sprays water mist toward the dustproof net to flush the dustproof net.

9. The tunnel auxiliary device according to any one of claims 1-4, characterized in that, The tunnel auxiliary device also includes a resonator, which is disposed between the main body and the dustproof layer, and is used for noise reduction.

10. The tunnel auxiliary device according to any one of claims 1-4, characterized in that, The number of pressure relief holes is multiple, and each pressure relief hole is spaced apart on opposite side walls of the flow guide channel along the extension direction of the flow guide channel; In the extension direction of the flow channel, at least one flow guide plate is provided between any two adjacent pressure relief holes, and each flow guide plate is inclined toward the tunnel entrance end face.

Images