Air curtain system for tunnel portal and method of constructing an air curtain system

Abstract

The application discloses a wind curtain system for a tunnel portal and a construction method of the wind curtain system, and the wind curtain system for the tunnel portal comprises a wind curtain machine, a mounting frame, a mounting plate and a suspension support, the mounting frame comprises two mounting arch columns, and a mounting space for accommodating the wind curtain machine is formed between the two mounting arch columns; the mounting plate comprises a first plate body and a second plate body, the first plate body is connected with the mounting arch column, the second plate body is connected with the wind curtain machine, the suspension support is mounted on the mounting arch column, and the suspension support is used for fixing a contact net line. The mounting space for accommodating the wind curtain machine is formed between the two mounting arch columns, the wind curtain machine is clamped between the two mounting arch columns, the two mounting arch columns play a limiting role on the wind curtain machine, and the wind curtain machine is conveniently mounted on the mounting arch column through the mounting plate subsequently; the suspension support is mounted on the mounting arch column, the wind curtain fixing device can fix the contact net line through the suspension support, and the wind curtain fixing device has the function of fixing the contact net line.

Description

Technical Field

[0001] This invention relates to the field of tunnel entrance air curtain machine construction technology, and in particular to an air curtain system for tunnel entrances and an air curtain system construction method. Background Technology

[0002] Currently, high-pressure air curtains are installed at tunnel entrances to block cold air from entering the tunnel by blowing air through them to form an air curtain. However, in traditional construction, the fixing devices used to fix the air curtains can only be used to fix the air curtains, which results in the existing air curtain fixing devices having a relatively limited function.

[0003] Therefore, it is necessary to provide a new air curtain system and construction method for tunnel entrances to solve or at least alleviate the above-mentioned technical defects. Summary of the Invention

[0004] The main objective of this invention is to provide an air curtain system and an air curtain system construction method for tunnel entrances, aiming to solve the technical problem of the limited functionality of existing air curtain machine fixing devices.

[0005] To achieve the above objectives, the present invention provides an air curtain system for tunnel entrances, the air curtain system for tunnel entrances comprising:

[0006] Air curtain machine;

[0007] The mounting frame includes two mounting arches spaced apart outside the tunnel entrance along the extension direction of the tunnel, and an installation space for accommodating the air curtain machine is formed between the two mounting arches.

[0008] The mounting plate is positioned directly opposite the gap between the mounting arch and the air curtain machine. The mounting plate includes a first plate and a second plate that are connected to each other. The first plate is connected to the mounting arch by a first fastener, and the second plate is connected to the air curtain machine by a second fastener.

[0009] A suspension bracket is installed on the mounting arch column and is used to fix the contact wire.

[0010] In one embodiment, the number of air curtain machines is at least two, and the at least two air curtain machines are respectively arranged opposite each other on both sides of the tunnel entrance in the horizontal direction; the air ducts of the air curtain machines are deflected in the direction of the tunnel entrance, so that the angle between the air ducts of the air curtain machines and the horizontal direction is 5° to 15°.

[0011] In one embodiment, the air curtain system for the tunnel entrance further includes a wind deflector mechanism installed on the outside or inside of the mounting arch, so that the wind deflector mechanism, the air curtain machine, the mounting arch, the ground, and the tunnel end wall form an air curtain space. The wind deflector mechanism is used to prevent outside air from entering the air curtain space from a direction perpendicular to the extension direction of the tunnel entrance.

[0012] In one embodiment, the wind deflector mechanism includes a top wind deflector assembly and a side wind deflector assembly. The side wind deflector assembly is used to block the gap that connects laterally to the air curtain space from the mounting arch. The top wind deflector assembly includes a plurality of sequentially fitted top wind deflectors, each of which is connected to the top of two mounting arches. The sidewall of each top wind deflector facing the tunnel entrance is used to fit against the end wall of the tunnel entrance. The top wind deflectors are used to prevent outside air from entering the air curtain space vertically from the gap between the mounting arch and the end wall of the tunnel, as well as from the gap between the two mounting arches.

[0013] In one embodiment, the side wind deflector assembly includes a plurality of side wind deflectors, which are detachably connected to the air curtain machine and / or the mounting arch, and are used to block the gaps between the mounting arch and the end wall of the tunnel in the horizontal direction, as well as the gaps between the mounting arch and the air curtain machine.

[0014] In one embodiment, the air curtain system for the tunnel entrance further includes a connector, one end of which is connected to one of the mounting arches, and the other end of which is connected to another mounting arch.

[0015] Furthermore, the present invention also provides a method for constructing an air curtain system, which is applied to the aforementioned air curtain system for tunnel entrances. The steps of the method include:

[0016] Construction is carried out on the foundation for installing the arch columns, and the arch column fixing bolts are pre-embedded;

[0017] Install the mounting arch column;

[0018] Install the top wind deflector assembly on the top of the mounting arch;

[0019] Install an air curtain machine on the mounting arch column;

[0020] Install side wind deflector assemblies on the mounting arch and / or the air curtain machine;

[0021] Install the suspension bracket on the mounting arch, and then fix the contact wire to the suspension bracket.

[0022] In one embodiment, the steps of constructing the foundation for installing the arch column and pre-embedding the arch column fixing bolts include:

[0023] Determine whether there are two utility poles respectively located on the left and right sides of the tunnel entrance within a preset range outside the tunnel entrance;

[0024] If so, the foundations of the two columns shall be constructed, and the foundation bolts of the two columns shall be pre-embedded.

[0025] In one embodiment, the step of installing the mounting arch includes:

[0026] Install two of the aforementioned columns;

[0027] Install one of the crossbeams to connect the two columns respectively, and install another crossbeam to connect the two utility poles;

[0028] Install connectors for connecting the two beams respectively.

[0029] In one embodiment, the step of installing the air curtain machine on the installation arch includes:

[0030] Adjust the air outlet angle of the air curtain machines located on both sides of the tunnel entrance;

[0031] The mounting plate is installed on the air curtain machine and the column.

[0032] In the above technical solution of the present invention, by setting two mounting arches at intervals on the outside of the tunnel entrance and along the extension direction of the tunnel, an installation space for accommodating the air curtain machine is formed between the two spaced mounting arches. The air curtain machine is sandwiched between the two mounting arches, and the two mounting arches limit the air curtain machine, facilitating the subsequent installation of the air curtain machine on the mounting arches via mounting plates, thus saving the installation time of the air curtain machine. The first plate is connected to the mounting arches via a first fastener, and the second plate is connected to the air curtain machine via a second fastener, so that the air curtain machine is connected to the mounting arches via the mounting plates. The column connection and the mounting plate cover part of the gap between the air curtain machine and the mounting arch, blocking some of the external cold air from entering the tunnel through the gap between the air curtain machine and the mounting arch. At the same time, since there are contact wires along the railway line, and the contact wires need to be fixed at certain intervals, by setting up suspension brackets and installing the suspension brackets on the mounting arch, the mounting arch can fix the contact wires through the suspension brackets. Thus, the mounting arch not only limits the air curtain machine for subsequent installation, but also serves to fix the contact wires. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of an air curtain system for a tunnel entrance according to an embodiment of the present invention;

[0035] Figure 2 This is a partial structural schematic diagram of an air curtain system for a tunnel entrance according to an embodiment of the present invention;

[0036] Figure 3 This is a partial structural schematic diagram of an air curtain system for a tunnel entrance according to an embodiment of the present invention;

[0037] Figure 4 This is a cross-sectional schematic diagram of a connector according to an embodiment of the present invention;

[0038] Figure 5 This is a partial structural schematic diagram of an air curtain system for a tunnel entrance according to an embodiment of the present invention;

[0039] Figure 6 This is a partial structural schematic diagram of the windbreak plate body according to an embodiment of the present invention;

[0040] Figure 7 This is a partial structural schematic diagram of an air curtain system for a tunnel entrance according to an embodiment of the present invention;

[0041] Figure 8 This is a flowchart illustrating the first embodiment of the construction method for an air curtain system according to the present invention.

[0042] Figure 9 This is a flowchart illustrating a second embodiment of the construction method for an air curtain system according to an embodiment of the present invention;

[0043] Figure 10 This is a flowchart illustrating a third embodiment of the construction method for an air curtain system according to an embodiment of the present invention;

[0044] Figure 11 This is a flowchart illustrating the fourth embodiment of the construction method for an air curtain system according to an embodiment of the present invention.

[0045] Explanation of icon numbers:

[0046]

[0047] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that all directional indications (such as up, down, left, and right) in the embodiments of this invention are only used to interpret a specific posture (as shown in the attached diagram). Figure 1 The relative positions and movements of the components shown below are considered. If the specific posture changes, the directional indication will also change accordingly.

[0050] Furthermore, in this invention, descriptions involving "first," "second," etc., are 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. Thus, a feature defined with "first" or "second" can explicitly or implicitly include at least one of that feature.

[0051] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0052] This invention provides an air curtain system 1 for tunnel entrances. The air curtain system 1 includes an air curtain machine 21, a mounting frame 11, a mounting plate 16, and a suspension bracket 13. The mounting frame 11 includes two mounting arches 12 spaced apart outside the tunnel entrance along the tunnel's extension direction, with an installation space between the two mounting arches 12 for accommodating the air curtain machine 21. The mounting plate 16 is positioned opposite the gap between the mounting arches 12 and the air curtain machine 21. The mounting plate 16 includes a first plate and a second plate connected to each other. The first plate is connected to the mounting arches 12 by a first fastener, and the second plate is connected to the air curtain machine 21 by a second fastener. Both the air curtain machine 21 and the mounting arches 12 are connected to the mounting plate 16. The suspension bracket 13 is mounted on the mounting arches 12 and is used to fix the contact wire.

[0053] Specifically, by setting two mounting arches 12 at intervals on the outside of the tunnel entrance and along the tunnel's extension direction, an installation space is formed between the two spaced mounting arches 12 to accommodate the air curtain machine 21. The air curtain machine 21 is sandwiched between the two mounting arches 12, which limit the movement of the air curtain machine 21, facilitating its subsequent installation on the mounting arches 12 via the mounting plate 16, thus saving installation time. The first plate is connected to the mounting arches 12 via a first fastener, and the second plate is connected to the air curtain machine 21 via a second fastener. This allows the air curtain machine 21 to be connected to the mounting arches 12 via the mounting plate 16, and the mounting plate 16 blocks part of the gap between the air curtain machine 21 and the mounting arches 12, preventing some external cold air from entering the tunnel through the gap between the air curtain machine 21 and the mounting arches 12. Along railway lines, overhead contact lines are installed, and these lines need to be fixed at regular intervals. In existing technologies, these lines are typically fixed using supports inside tunnels and utility poles outside. This process requires time to construct not only the poles for fixing the contact lines but also the fixing devices for the air curtain machine 21, resulting in a long construction period. This invention addresses this by installing a suspension bracket 13 on an installation arch 12. The installation arch 12 can then fix the contact lines using the suspension bracket 13. This allows the installation arch 12 to not only limit the position of the air curtain machine 21 for subsequent installation but also to fix the contact lines, eliminating the need to build utility poles at the tunnel entrance for this purpose and thus shortening the construction period. Furthermore, placing the installation arch 12 outside the tunnel entrance utilizes the existing reinforced concrete foundation, allowing for rapid installation of the arch 12 and enabling quick installation of the air curtain machine 21 on the existing railway line.

[0054] According to a preferred embodiment of the present invention, the mounting plate is 40cm long, 25cm wide, and 2cm thick, and the number of mounting plates used to fix one side of the air curtain machine is 10.

[0055] Furthermore, the air curtain system 1 for the tunnel entrance also includes a wind deflector mechanism 14, which is installed on the outside or inside of the mounting arch 12, so that the wind deflector mechanism 14, the air curtain machine 21, the mounting arch 12, the ground, and the tunnel end wall 31 enclose an air curtain space. The wind deflector mechanism 14 is used to prevent outside air from entering the air curtain space from a direction perpendicular to the extension direction of the tunnel entrance 3. By setting the air curtain machine 21, the air blown by the air curtain machine 21 forms an air curtain, which is used to block outside air from entering the tunnel along the extension direction of the tunnel. By setting the wind deflector mechanism 14, the wind deflector mechanism 14, the air curtain machine 21, the mounting arch 12, the ground, and the tunnel end wall 31 together constitute a barrier to prevent outside air from entering the tunnel from a direction perpendicular to the extension direction of the tunnel.

[0056] Furthermore, the wind deflector mechanism 14 includes a top wind deflector assembly 141 and a side wind deflector assembly 142. The side wind deflector assembly 142 is used to block the gaps in the lateral air curtain space connected to the mounting arch 12. The top wind deflector assembly 141 includes a plurality of sequentially fitted top wind deflectors, each of which is connected to the top of two mounting arch 12s. The sidewall of each top wind deflector facing the tunnel entrance 3 is used to fit against the end wall 31 of the tunnel entrance 3. The top wind deflectors prevent outside air from entering the air curtain space vertically through the gaps between the mounting arch 12 and the tunnel end wall 31, as well as the gaps between the two mounting arch 12s. The vertical direction is... Figure 1 As shown in the vertical direction, the side wind deflector assembly 142 is designed to prevent wind from the left and right sides of the mounting arch 12 from entering the air curtain space and then the tunnel through the gap between the air curtain machine 21 and the mounting arch 12 or the gap between the mounting arch 12 and the tunnel end wall 31. The top wind deflectors are sequentially attached to prevent external air from entering the air curtain space through the gaps between the top wind deflectors. The side of the top wind deflector facing the end wall 31 of the tunnel entrance 3 abuts against the end wall 31 of the tunnel entrance 3 to prevent external air from entering the air curtain space through the gap between the top wind deflector and the end wall 31 of the tunnel entrance 3, and then entering the tunnel through the air curtain space.

[0057] In addition, the top windbreak includes a windbreak body 1411 and a flexible buffer. The windbreak body 1411 is connected to the top of the mounting arch 12. The flexible buffer is located between the windbreak body 1411 and the end wall 31 of the tunnel entrance 3. One side of the flexible buffer is in contact with the windbreak body 1411, and the other side is in contact with the end wall 31 of the tunnel entrance 3 to cover the gap between the windbreak body 1411 and the end wall 31 of the tunnel entrance 3. The flexible buffer can be a rubber buffer. By adding a flexible buffer, a transition connection is made between the windbreak body 1411 and the tunnel end wall 31, which can both isolate the wind and prevent the rigid structure of the windbreak body 1411 from directly contacting the concrete end wall 31 under external force and causing rigid failure. It should be noted that the body is made of aerospace aluminum, which gives the body the characteristics of light weight and high strength; in addition, such as Figure 6 As shown, the wind deflector body 1411 has stiffening ribs 1412 on the side facing the mounting arch column 12 to enhance the structural strength of the wind deflector body 1411. According to a preferred embodiment of the present invention, the length of the wind deflector body 1411 is 4875 mm and the width is 1955 mm.

[0058] like Figure 2 and Figure 5 As shown, a support seat 17 is provided at the top of the mounting arch 12. The support seat 17 extends along the extension direction of the mounting arch 12. The support seat 17 includes a bearing surface 171, a connecting part 151, and multiple supporting parts 173. The bearing surface 171 is connected to the mounting arch 12 through the connecting part 151 and the multiple supporting parts 173. The multiple supporting parts 173 are spaced apart along the extension direction of the support seat 17. The connecting part 151 and the supporting parts 173 are respectively provided on both sides of the bearing surface 171. The extension direction of the connecting part 151 is consistent with the extension direction of the bearing surface 171. The wind deflector body 1411 is installed on the bearing surface 171. By providing the support seat 17, the wind deflector body 1411 can be installed. By providing the multiple connecting parts 151 and supporting parts 173, reliable support is provided for the bearing surface 171.

[0059] The side windbreak assembly 142 includes multiple side windbreaks, which are detachably connected to the air curtain machine 21 and / or the mounting arch 12. The side windbreaks are used to block the gaps between the mounting arch 12 and the tunnel end wall 31 in the horizontal direction, as well as the gap between the mounting arch 12 and the air curtain machine 21. The horizontal direction is... Figure 1As shown in the left-right direction, among the multiple side wind deflectors, some side wind deflectors are used to block the gap between the air curtain machine 21 and the mounting arch 12, some side wind deflectors are used to block the gap between the air curtain machine 21 and the top wind deflector, and some side wind deflectors are used to block the gap between the mounting arch 12 and the end wall 31 of the tunnel entrance 3, thereby preventing external air from entering the air curtain space from the left and right sides of the mounting arch 12. It should be noted that rubber seals can be added to the gaps between the side wind deflectors and the end wall 31 of the tunnel entrance 3 to block the entry of external air.

[0060] like Figure 3 As shown, the air curtain system 1 for the tunnel entrance also includes a connector 15. One end of the connector 15 is connected to a mounting arch 12, and the other end of the connector 15 is connected to another mounting arch 12. By connecting the two mounting arches 12 with the connector 15, the reliability of the two mounting arches 12 clamping the air curtain machine 21 is enhanced. In addition, bolt holes are provided on the top surface of the connector 15, so that the wind deflector body 1411 can be connected to the connector 15 with bolts.

[0061] like Figure 3 and Figure 4 As shown, there are multiple connectors 15, each connector 15 including a spanning portion 172, a reinforcing portion 152, and two mounting portions. The two mounting portions are respectively disposed at both ends of the spanning portion 172. The reinforcing portion 152 is connected to the spanning portion 172 and the mounting portions, and the mounting portions are mounted on the mounting arch column 12. By providing multiple connectors 15, the reliability of the two mounting arch columns 12 in clamping the air curtain machine 21 is further enhanced, and the reinforcing portion 152 is provided to enhance the structural strength of the connectors 15.

[0062] like Figure 1 As shown, the arch support 12 includes two columns 121 respectively located on both sides of the tunnel entrance 3 and a crossbeam 122 connecting the two columns 121. The crossbeam 122 is located at the top of the columns 121. The two columns 121 of one arch support 12 can be replaced by the two utility poles closest to the tunnel entrance 3. Only the crossbeam 122 connecting the two utility poles needs to be added to the top of the two poles. Using existing utility poles as the columns 121 for the arch support 12 can shorten the construction period and make the installation of the air curtain machine 21 more efficient.

[0063] In addition, there are at least two air curtain machines 21, which are horizontally positioned opposite each other on both sides of the tunnel entrance. The air ducts of the air curtain machines 21 are deflected towards the tunnel entrance, so that the angle between the air ducts of the air curtain machines 21 and the horizontal direction is 5° to 15°. The air curtain machines 21 located on both sides of the tunnel entrance are positioned opposite each other, and the air outlet direction of each air curtain machine 21 is deflected by an angle α (5° ≤ α ≤ 15°) towards the tunnel entrance compared to its horizontal position. This allows the converging airflows to move out of the tunnel, forming resistance to cold air outside the tunnel and preventing the airflow formed by the air curtain from moving into the tunnel and failing to achieve the isolation effect. It should be noted that the position of the air curtain machine 21 can be adjusted, that is, the air curtain machines 21 located on both sides of the tunnel entrance can be arranged in an outward V-shape to change the direction of the air duct blown out by the air curtain machine 21; or the air outlet angle of the air curtain machine 21 can be changed by adding a guide plate; or the air outlet angle of the air curtain machine 21 can be changed by adjusting the rotation angle of the guide plate of the air curtain machine 21 itself.

[0064] Furthermore, the present invention also provides a construction method for an air curtain system, which is applied to the aforementioned air curtain system for tunnel entrances, such as... Figure 8 As shown, the construction method of the air curtain system includes the following steps:

[0065] S100 involves constructing the foundation for installing the arch columns and pre-embedding the arch column fixing bolts;

[0066] After cleaning the construction site, the foundation construction for the arch columns is carried out at the locations where they need to be installed, and the arch column fixing bolts are pre-embedded to facilitate the subsequent installation of the arch columns.

[0067] S200, Install the mounting arch column;

[0068] Two mounting arches are installed at intervals along the tunnel's extension direction, forming an installation space between them to accommodate the air curtain machine. The uprights of the two mounting arches clamp the air curtain machine, limiting its position to facilitate subsequent installation.

[0069] S300, Install the top wind deflector assembly on the top of the mounting arch;

[0070] Installing the top wind deflector assembly can effectively prevent air outside the top wind deflector assembly from blowing vertically into the air curtain space from above, and then entering the tunnel through the air curtain space.

[0071] S400, Install an air curtain machine on the mounting arch column;

[0072] The air curtain machine is installed on the mounting arch column via a mounting plate. Then, the power supply to the air curtain machine is installed so that the air blown by the air curtain machine forms an invisible air curtain at the tunnel entrance, separating the inside of the tunnel from the outside and preventing outside air from entering the tunnel.

[0073] S500, install side wind deflector assemblies on the mounting arch and / or the air curtain machine;

[0074] By installing side wind deflector assemblies, it is possible to effectively prevent air from outside the side wind deflector assemblies from being blown into the air curtain space horizontally from the left and right sides of the air curtain space, and then into the tunnel through the air curtain space. The air curtain formed by the air curtain machine, together with the top wind deflector assemblies and the side wind deflector assemblies, can block the outside air from entering the tunnel.

[0075] S600, install the suspension bracket on the mounting arch column, and then fix the contact wire to the suspension bracket;

[0076] The suspension bracket is installed on the mounting arch. The mounting arch can fix the contact wire through the suspension bracket, so that the mounting arch not only limits the air curtain machine for subsequent installation, but also fixes the contact wire.

[0077] By installing two arched columns at intervals along the tunnel's extension direction outside the tunnel entrance, an installation space is formed between the two arched columns to accommodate the air curtain machine. The air curtain machine is sandwiched between the two arched columns, which limit its movement and facilitate subsequent installation of the air curtain machine onto the arched columns via mounting plates, saving installation time. The air curtain formed by the air curtain machine, along with the top and side wind deflector assemblies, collectively prevents external air from entering the tunnel. Furthermore, since there are overhead contact lines along the railway line, and these lines need to be fixed at certain intervals, suspension brackets are installed on the arched columns. These brackets allow the contact lines to be fixed in place, thus enabling the arched columns to not only limit the air curtain machine's movement for subsequent installation but also secure the contact lines.

[0078] like Figure 9 As shown, step S100 includes:

[0079] S110, determine whether there are two utility poles respectively set on the left and right sides of the tunnel entrance within a preset range outside the tunnel entrance;

[0080] S120, if so, then the foundations of the two columns shall be constructed and the foundation bolts of the two columns shall be pre-embedded.

[0081] Originally, installing two arched columns required pre-embedding foundation bolts in four locations for the subsequent installation of four columns. However, since there are usually utility poles along railway lines used to fix the contact network cable, having existing utility poles that can serve as columns can greatly save construction time and also serve the purpose of fixing the contact network cable.

[0082] like Figure 10 As shown, step S200 includes:

[0083] S210, Install the two aforementioned columns;

[0084] S220, install one of the crossbeams to connect the two columns respectively, and install another crossbeam to connect the two utility poles;

[0085] S230, Install connectors for connecting the two beams respectively.

[0086] The two crossbeams are connected by connectors to ensure the reliability of the column clamping the air curtain machine. The connectors are also provided with bolt holes for installing the top wind deflector, which facilitates the installation of the top wind deflector.

[0087] like Figure 11 As shown, the steps of S500 include:

[0088] S510, Adjust the air outlet angle of the air curtain machines located on both sides of the tunnel entrance to a preset angle;

[0089] S520, the mounting plate is installed on the air curtain machine and the column.

[0090] Air curtain machines are positioned opposite each other on both sides of the tunnel entrance. The airflow angle of each machine is adjusted to a preset angle, denoted as α, where 5° ≤ α ≤ 15°. This allows the converging airflows to move outwards from the tunnel, resisting cold air from outside and preventing the airflow from moving into the tunnel, thus achieving the desired isolation effect. It should be noted that the positions of the air curtain machines can be adjusted. For example, the air curtain machines on both sides of the tunnel entrance can be arranged in a V-shape to change the direction of the airflow; or the airflow angle can be changed by adding guide vanes; or the airflow angle can be changed by adjusting the rotation angle of the guide vanes themselves.

[0091] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air curtain system for tunnel entrances, characterized in that, include: Air curtain machine; The mounting frame includes two mounting arches spaced apart outside the tunnel entrance along the extension direction of the tunnel, and an installation space for accommodating the air curtain machine is formed between the two mounting arches. The mounting plate is positioned directly opposite the gap between the mounting arch and the air curtain machine. The mounting plate includes a first plate and a second plate that are connected to each other. The first plate is connected to the mounting arch by a first fastener, and the second plate is connected to the air curtain machine by a second fastener. A suspension bracket is installed on the mounting arch column and is used to fix the contact wire. The air curtain machine is sandwiched between the two mounting arches, and the two mounting arches can restrict the movement of the air curtain machine. The number of air curtain machines is at least two, and the at least two air curtain machines are respectively arranged opposite each other on both sides of the tunnel entrance in the horizontal direction; the air ducts of the air curtain machines are deflected in the direction of the tunnel entrance so that the angle between the air ducts of the air curtain machines and the horizontal direction is 5°~15°.

2. The air curtain system for tunnel entrances according to claim 1, characterized in that, The air curtain system for the tunnel entrance also includes a wind deflector mechanism, which is installed on the outside or inside of the mounting arch column so that the wind deflector mechanism, the air curtain machine, the mounting arch column, the ground and the end wall of the tunnel form an air curtain space. The wind deflector mechanism is used to prevent outside air from entering the air curtain space from a direction perpendicular to the extension direction of the tunnel entrance.

3. The air curtain system for tunnel entrances according to claim 2, characterized in that, The wind deflector mechanism includes a top wind deflector assembly and a side wind deflector assembly. The side wind deflector assembly is used to block the gap that connects to the air curtain space from the side of the mounting arch. The top wind deflector assembly includes a plurality of top wind deflectors that are attached to each other in sequence. Each top wind deflector is connected to the top of two mounting arches, and the sidewall of each top wind deflector facing the tunnel entrance is used to fit against the end wall of the tunnel entrance. The top wind deflectors are used to prevent outside air from entering the air curtain space vertically from the gap between the mounting arch and the end wall of the tunnel, as well as the gap between the two mounting arches.

4. The air curtain system for tunnel entrances according to claim 3, characterized in that, The side wind deflector assembly includes multiple side wind deflectors, which are detachably connected to the air curtain machine and / or the mounting arch. The side wind deflectors are used to block the gaps between the mounting arch and the end wall of the tunnel in the horizontal direction, as well as the gaps between the mounting arch and the air curtain machine.

5. The air curtain system for tunnel entrances according to any one of claims 1 to 4, characterized in that, The air curtain system for the tunnel entrance also includes a connector, one end of which is connected to one of the mounting arch columns, and the other end of which is connected to another mounting arch column.

6. A construction method for an air curtain system, characterized in that, The air curtain system construction method is applied to the air curtain system for tunnel entrances as described in any one of claims 1 to 5, and the steps of the air curtain system construction method include: Construction is carried out on the foundation for installing the arch columns, and the arch column fixing bolts are pre-embedded; Install the mounting arch column; Install the top wind deflector assembly on the top of the mounting arch; Install an air curtain machine on the mounting arch; Install side wind deflector assemblies on the mounting arch and / or the air curtain machine; Install the suspension bracket on the mounting arch, and then fix the contact wire to the suspension bracket.

7. The construction method of the air curtain system according to claim 6, wherein the installation arch column comprises two columns respectively disposed on both sides of the tunnel entrance and a crossbeam for connecting the two columns, the crossbeam being located at the top of the columns, characterized in that, The steps for constructing the foundation for installing the arch columns and pre-embedding the arch column fixing bolts include: Determine whether there are two utility poles respectively located on the left and right sides of the tunnel entrance within a preset range outside the tunnel entrance; If so, the foundations of the two columns shall be constructed, and the foundation bolts of the two columns shall be pre-embedded.

8. The construction method of the air curtain system according to claim 7, characterized in that, The steps for installing the arch column include: Install two of the aforementioned columns; Install one of the aforementioned crossbeams to connect the two aforementioned columns respectively, and install another crossbeam to connect the two aforementioned utility poles; Install connectors for connecting the two beams respectively.

9. The construction method of the air curtain system according to claim 8, characterized in that, The step of installing the air curtain machine on the installation arch column includes: Adjust the air outlet angle of the air curtain machines located on both sides of the tunnel entrance; The mounting plate is installed on the air curtain machine and the column.

Images