Wind-sand filter structure for railway vehicle and railway vehicle

Abstract

A wind-sand filter structure for a railway vehicle, and a railway vehicle. The wind-sand filter structure for a railway vehicle comprises a first-stage filter unit (100) and a second-stage filter unit (200). The first-stage filter unit (100) is arranged on a side wall of a vehicle body (300), the first-stage filter unit (100) has an air inlet formed on an outer surface of the vehicle body (300), and the first-stage filter unit (100) has a first air outlet and a second air outlet that are formed on the vehicle body (300). The first air outlet is adapted to connect to a heat dissipation pipe, and the heat dissipation pipe is adapted to extend to a heat dissipation area of a cooling device of the railway vehicle. The second-stage filter unit (200) is arranged inside the vehicle body (300), an air intake end of the second-stage filter unit (200) is in communication with the second air outlet, an air discharge end of the second-stage filter unit (200) is connected to an air pipe, and the air pipe is adapted to connect to an air-utilization apparatus. By means of cooperation of the first-stage filter unit (100) and the second-stage filter unit (200), the wind-sand prevention capacity of the railway vehicle can be improved, wear and tear of internal devices are avoided, the riding comfort is improved, and effective wind-sand filtering is achieved.

Description

Wind and sand filtering structure of rail vehicle and rail vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202321967341.7, filed on July 25, 2023, entitled “Wind and Sand Filtering Structure for Rail Vehicle and Rail Vehicle,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of rail vehicles, and in particular to a wind and sand filtering structure for a rail vehicle and a rail vehicle. Background Art

[0004] When rail vehicles operate in a high-wind and sand environment, the cooling air will contain a large amount of wind and sand for the equipment inside the rail vehicles, which will cause wear of the internal components of the rail vehicles and overheating of the equipment; for the driver's cab and passenger compartment, the wind and sand will cause sand accumulation inside and affect comfort.

[0005] Summary of the Invention

[0006] The present application provides a wind and sand filtering structure for a rail vehicle, which is used to solve the technical problems in the prior art that the rail vehicle has insufficient wind and sand protection capability, causing wear of internal components and insufficient riding comfort, and realizes effective wind and sand filtering.

[0007] The present application also provides a rail vehicle.

[0008] The present application provides a wind and sand filtering structure for a rail vehicle, comprising:

[0009] A primary filter unit is provided on a side wall of the vehicle body, the primary filter unit having an air inlet formed on an outer surface of the vehicle body, and a first air outlet and a second air outlet formed inside the vehicle body, the first air outlet being adapted to be connected to a heat dissipation pipe adapted to extend to a heat dissipation area of ​​a cooling device of the rail vehicle;

[0010] The secondary filter unit is arranged inside the vehicle body, the air inlet end of the secondary filter unit is connected to the second air outlet, the air outlet end of the secondary filter unit is connected to an air duct, and the air duct is suitable for connecting to air-using equipment.

[0011] According to a wind and sand filtering structure for a rail vehicle provided in the present application, the primary filtering unit includes a shutter, and the shutter is suitable for being embedded in the side wall of the vehicle body.

[0012] According to a wind and sand filtering structure for a rail vehicle provided in this application, the secondary filtering unit includes:

[0013] case;

[0014] a filter, mounted on the air inlet end of the housing;

[0015] a dust collecting box installed in the housing, wherein a dust collecting cavity is formed in the dust collecting box, and the filter is connected to the dust collecting cavity to allow sand and dust to fall into the dust collecting cavity;

[0016] The fan is installed in the shell and is connected to the dust outlet of the dust collecting box, and is used to extract sand and dust in the dust collecting cavity.

[0017] According to a wind and sand filtering structure for a rail vehicle provided in the present application, the filter includes a straight-through cyclone tube filter, and the dust collecting box is located below the filter.

[0018] According to a wind and sand filtering structure for a rail vehicle provided in the present application, an annular connecting portion is provided on the outer side wall of the shell surrounding the air outlet end, and the air duct is suitable for being snapped into the annular connecting portion.

[0019] According to a wind and sand filtering structure for a rail vehicle provided in the present application, an adhesive member for connecting the air duct and the annular connecting portion is provided between the air duct and the annular connecting portion.

[0020] According to a wind and sand filtering structure for a rail vehicle provided in the present application, the air duct is clamped in the annular connecting portion, and a first mounting groove is provided on the inner circumferential surface of the annular connecting portion or the outer circumferential surface of the air duct. The adhesive is suitable for being installed in the first mounting groove, and the adhesive extends out of the notch of the first mounting groove.

[0021] According to a wind and sand filtering structure for a rail vehicle provided in the present application, the air duct is clamped to the outside of the annular connecting portion, and a second mounting groove is provided on the outer circumferential surface of the annular connecting portion or the inner circumferential surface of the air duct. The adhesive is suitable for being installed in the second mounting groove, and the adhesive extends out of the notch of the second mounting groove.

[0022] According to a wind and sand filtering structure for a rail vehicle provided in the present application, the air-using equipment includes an electrical cabinet, which is suitable for installing a micro-positive pressure mechanism for drawing filtered air into the electrical cabinet and discharging the original air from the electrical cabinet.

[0023] The present application also provides a rail vehicle, comprising a vehicle body, wherein the vehicle body is provided with the wind and sand filtering structure of the rail vehicle as described above.

[0024] The wind and sand filtering structure for a rail vehicle provided in an embodiment of the present application performs preliminary filtration of wind and sand-laden air through a primary filter unit. The initially filtered air, on the one hand, enters a heat dissipation pipe through a first air outlet and is blown to a heat dissipation area of ​​a cooling device of the rail vehicle via the heat dissipation pipe, thereby removing heat from the cooling device and discharging it, thereby achieving heat exchange at the cooling device. On the other hand, the initially filtered air enters a secondary filter unit through a second air outlet for secondary filtration. The secondary filtration ensures that the air cleanliness meets the requirements, and the secondary filtered air is used in air-using equipment to achieve safe air use. Through the coordinated cooperation of the primary filter unit and the secondary filter unit, the wind and sand filtering structure can enhance the wind and sand protection capability of the rail vehicle, avoid wear of internal components, improve ride comfort, achieve effective wind and sand filtration, and facilitate heat dissipation of the cooling device.

[0025] The rail vehicle provided by the embodiment of the present application is provided with the aforementioned wind and sand filtering structure of the rail vehicle installed on the vehicle body, and the air containing wind and sand is initially filtered by the primary filter unit. On the one hand, the initially filtered air enters the heat dissipation pipe through the first air outlet and is blown to the heat dissipation area of ​​the cooling device of the rail vehicle through the heat dissipation pipe, which is used to remove heat from the cooling device and discharge it, thereby realizing heat exchange at the cooling device. On the other hand, the initially filtered air enters the secondary filter unit through the second air outlet for secondary filtration. The secondary filtration can ensure that the cleanliness of the air meets the requirements, and the secondary filtered air is used for air-using equipment to realize safe air use. The wind and sand filtering structure can improve the wind and sand resistance of the rail vehicle through the coordinated cooperation of the primary filter unit and the secondary filter unit, avoid wear of internal components, improve the lack of ride comfort, realize effective wind and sand filtration, and facilitate heat dissipation of the cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] FIG1 is a schematic structural diagram of a wind and sand filtering structure for a rail vehicle provided in an embodiment of the present application;

[0028] FIG2 is a schematic structural diagram of a secondary filtration unit provided in an embodiment of the present application;

[0029] FIG3 is a diagram showing the simulation analysis results of the internal and external flow fields of the first-stage filtration unit provided in an embodiment of the present application.

[0030] Reference numerals: 100, primary filter unit; 200, secondary filter unit; 210, housing; 220, filter; 230, dust collecting box; 240, fan; 250, annular connecting portion; 300, vehicle body. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0034] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0036] The following describes an embodiment of the present application in conjunction with Figures 1 to 3. This embodiment provides a wind and sand filtering structure for a rail vehicle, including a primary filter unit 100 and a secondary filter unit 200. The primary filter unit 100 is arranged on the side wall of the vehicle body 300. The primary filter unit 100 is formed with an air inlet on the outer surface of the vehicle body 300. The primary filter unit 100 is formed with a first air outlet and a second air outlet inside the vehicle body 300. The first air outlet is suitable for connecting to a heat dissipation pipe, and the heat dissipation pipe is suitable for extending to the heat dissipation area of ​​the cooling device of the rail vehicle. The secondary filter unit 200 is arranged inside the vehicle body 300. The air inlet end of the secondary filter unit 200 is connected to the second air outlet. The air outlet end of the secondary filter unit 200 is connected to an air duct, and the air duct is suitable for connecting to air-using equipment.

[0037] In this embodiment, the air containing wind and sand is initially filtered by the primary filter unit 100. The initially filtered air, on the one hand, enters the heat dissipation pipe through the first air outlet and is blown to the heat dissipation area of ​​the cooling device of the rail vehicle through the heat dissipation pipe, so as to remove heat from the cooling device and discharge it, thereby realizing heat exchange at the cooling device. On the other hand, the initially filtered air enters the secondary filter unit 200 through the second air outlet for secondary filtration. The secondary filtration can ensure that the air cleanliness meets the requirements, and the secondary filtered air is used for air-using equipment to realize safe air use. This wind and sand filtering structure, through the coordinated cooperation of the primary filter unit 100 and the secondary filter unit 200, can enhance the wind and sand protection capability of the rail vehicle, avoid wear of internal components, improve the ride comfort, realize effective wind and sand filtration, and facilitate heat dissipation of the cooling device.

[0038] The heat pipe extends to the cooling area of ​​the rail vehicle's cooling system. A cooling fan in this area removes heat from the cooling area and then exhausts it through the exhaust vents. During this process, any residual sand carried by the hot air is also expelled outside the vehicle, preventing it from settling. Because the cooling area is not particularly sensitive to sand, the air can be used directly after preliminary filtration.

[0039] According to the wind and sand filtering structure for a rail vehicle provided herein, the primary filter unit 100 includes louvers adapted to be embedded in the side walls of the vehicle body 300. The louvers perform a preliminary filtration of the wind and sand-laden air, which is then divided into two streams, one for heat dissipation and the other for use by wind-using equipment.

[0040] The blinds are embedded in the side walls of the vehicle body 300. It can be understood that a mounting hole is provided in the side walls of the vehicle body 300. The mounting hole can be set as a square hole. The blinds are embedded in the mounting hole and fixed to the side walls of the vehicle body 300 by fasteners or welding to ensure the stability of the blinds.

[0041] As shown in FIG3 , according to the simulation analysis result of the internal and external flow fields of the primary filtering unit 100 , it can be seen that after the primary filtering through the shutters, no sand and dust will be deposited inside the vehicle body 300 .

[0042] Among them, the outer side of the shutter is the air inlet, and the inner side of the shutter can be connected to a collecting device for collecting the air after preliminary filtration. One side of the collecting device covers the entire inner side of the shutter, and the other side of the collecting device forms a first air outlet and a second air outlet inside the vehicle body 300 to facilitate the connection of pipelines.

[0043] As shown in Figure 2, the secondary filtration unit 200 includes a housing 210, a filter 220, a dust box 230, and a fan 240. The filter 220 is mounted at the air inlet end of the housing 210. The dust box 230 is mounted within the housing 210. A dust collection chamber is formed within the dust box 230. The filter 220 is connected to the dust collection chamber to allow dust to fall into the dust collection chamber. The fan 240 is mounted within the housing 210 and is connected to the dust outlet of the dust box 230 to extract dust from the dust collection chamber.

[0044] The filter 220 is installed through the shell 210, so that the air after the initial filtration can be filtered twice through the filter 220 to ensure that the air filtered twice is dust-free. The dust filtered by the filter 220 can fall into the dust collecting chamber of the dust collecting box 230. The fan 240 can be started to extract the dust in the dust collecting chamber so that the dust can be discharged directly. The above structure can make the secondary filtration and dust removal and the discharge of dust synchronous, without the need to periodically clean the inside of the dust collecting box 230, thereby reducing the maintenance cost of the wind and sand filtering device.

[0045] The model of the fan 240 can be appropriately selected based on the amount of dust. The fan 240 can be equipped with a power control system to adjust the appropriate air flow rate based on the amount of dust, thereby ensuring dust removal while also achieving energy conservation.

[0046] The filter 220 can be removably mounted to the air inlet end of the housing 210 using fasteners, facilitating installation and maintenance of the filter 220. To further facilitate assembly and disassembly of the filter 220, the filter 220 is also removably connected to the dust box 230. Examples of such removable connections include screw connections.

[0047] The filter 220 includes a straight-through cyclone filter, whose filtration efficiency meets the corresponding requirements, and the dust collection box 230 is located below the filter 220. The straight-through cyclone filter allows the filtered sand and dust to fall directly downward, and then fall into the dust collection chamber below.

[0048] To facilitate the flow of dust across the bottom of the dust collection chamber, the bottom of the dust box 230 is configured as an inclined surface, and the dust outlet is positioned near the lower side of the inclined surface, thereby facilitating the complete removal of dust by the fan 240. It will be appreciated that an inclined surface has a higher side and a lower side, and when dust falls onto the inclined surface, it gradually slides down the inclined surface toward the lower side. Positioning the dust outlet near the lower side of the inclined surface allows the fan 240 to remove as much dust as possible from the dust collection chamber, facilitating its timely discharge.

[0049] In this embodiment, the outer wall of the housing 210 is provided with an annular connecting portion 250 surrounding the air outlet, and the air duct is adapted to be snapped onto the annular connecting portion 250. As shown in Figure 2, the annular connecting portion 250 is arranged around the circumference of the air outlet. The air duct is adapted to be directly and sealably snapped onto the annular connecting portion 250, ensuring that the secondary filtered air can enter the air duct, thereby cooling and lowering the temperature of the air-using equipment.

[0050] An adhesive member is provided between the air duct and the annular connecting portion 250 to connect the two. The adhesive member is used to bond the air duct and the annular connecting portion 250 to make the connection between the two more secure and reliable while also achieving an airtight seal. For example, the adhesive member is a hollow rubber strip, a foam rubber strip, or the like.

[0051] The shape of the air duct matches the shape of the annular connecting portion 250 , and the shape of the annular connecting portion 250 matches the shape of the air outlet. For example, the air outlet is set to be circular, the air duct is a circular pipe, and the annular connecting portion 250 is a circular ring connecting portion 250 .

[0052] In this embodiment, the air duct is clamped in the annular connecting portion 250, and a first mounting groove is provided on the inner circumference of the annular connecting portion 250 or the outer circumference of the air duct. The adhesive is suitable for being installed in the first mounting groove, and the adhesive extends out of the notch of the first mounting groove.

[0053] It can be understood that when the inner diameter of the annular connecting part 250 is the same as the outer diameter of the air duct, the air duct will be clamped to the inner side of the annular connecting part 250. By providing a first mounting groove on the inner circumference of the annular connecting part 250 or on the outer circumference of the air duct, it is convenient to fix the position of the adhesive during assembly, and it is convenient for the annular connecting part 250 and the air duct to be directly bonded and connected after clamping.

[0054] The adhesive member can be a single-sided adhesive strip, with one side of the adhesive member snapping into the first mounting groove and abutting against the bottom surface of the first mounting groove, and the other side of the adhesive member being the adhesive side, which extends beyond the notch of the first mounting groove to bond with the inner circumference of the annular connecting portion 250 or the outer circumference of the air duct. The adhesive member can also be a double-sided adhesive strip, with one side of the adhesive member snapping into the first mounting groove and abutting against the bottom surface of the first mounting groove, and the other side of the adhesive member extending beyond the notch of the first mounting groove to bond with the inner circumference of the annular connecting portion 250 or the outer circumference of the air duct.

[0055] In another embodiment, the air duct is clamped to the outside of the annular connecting portion 250, and a second installation groove is provided on the outer circumference of the annular connecting portion 250 or the inner circumference of the air duct. The adhesive is suitable for being installed in the second installation groove, and the adhesive extends out of the notch of the second installation groove.

[0056] It can be understood that when the outer diameter of the annular connecting part 250 is the same as the inner diameter of the air duct, the air duct will be clamped to the outside of the annular connecting part 250. By providing a second mounting groove on the outer peripheral surface of the annular connecting part 250 or on the inner peripheral surface of the air duct, it is convenient to fix the position of the adhesive during assembly, and it is convenient for the annular connecting part 250 and the air duct to be directly bonded and connected after clamping.

[0057] The adhesive member can be a single-sided adhesive strip, with one side of the adhesive member snapping into the second mounting groove and abutting against the bottom surface of the second mounting groove, and the other side of the adhesive member being the adhesive side, which extends beyond the notch of the second mounting groove, thereby bonding to the inner circumference of the annular connecting portion 250 or the outer circumference of the air duct. The adhesive member can also be a double-sided adhesive strip, with one side of the adhesive member snapping into the second mounting groove and abutting against the bottom surface of the second mounting groove, and the other side of the adhesive member extending beyond the notch of the second mounting groove, thereby bonding to the inner circumference of the annular connecting portion 250 or the outer circumference of the air duct.

[0058] According to the embodiment of the present application, the wind equipment for the wind and sand filtering structure of the rail vehicle includes an electrical cabinet, which is suitable for installing a micro-positive pressure mechanism for drawing filtered air into the electrical cabinet and discharging the original air out of the electrical cabinet.

[0059] By setting a micro-positive pressure mechanism in the electrical cabinet, the air that has been filtered for the second time to remove sand and dust can be introduced into the interior of the electrical cabinet, and the interior of the electrical cabinet can be ventilated and cooled.

[0060] The air-using equipment may also include diesel engines, main engines, traction motors, and air compressors. The air that has undergone secondary filtration is delivered to the air-using equipment through air ducts, and is directly discharged from the air-using equipment outside the vehicle after use.

[0061] On the other hand, the present application also provides a rail vehicle, including a vehicle body 300 , wherein the vehicle body 300 is provided with a wind and sand filtering structure of the rail vehicle as in the aforementioned embodiment.

[0062] In this embodiment, the aforementioned wind and sand filtering structure of the rail vehicle is installed on the vehicle body 300, and the primary filter unit 100 is used to perform preliminary filtration on the air containing wind and sand. On the one hand, the preliminary filtered air enters the heat dissipation pipe through the first air outlet and is blown to the heat dissipation area of ​​the cooling device of the rail vehicle through the heat dissipation pipe, which is used to remove heat from the cooling device and discharge it, thereby realizing heat exchange at the cooling device. On the other hand, the preliminary filtered air enters the secondary filter unit 200 through the second air outlet for secondary filtration. The secondary filtration can ensure that the cleanliness of the air meets the requirements, and the secondary filtered air is used for air-using equipment to achieve safe air use. This wind and sand filtering structure, through the coordinated cooperation of the primary filter unit 100 and the secondary filter unit 200, can improve the wind and sand protection capability of the rail vehicle, avoid wear of internal components, improve the lack of ride comfort, achieve effective wind and sand filtration, and facilitate heat dissipation of the cooling device.

[0063] In this embodiment, the car body 300 particularly refers to the carriage of the front part of the rail vehicle. A primary filter unit 100 is installed on the car body 300 of the front part, and a secondary filter unit 200 is installed in the car body 300 of the front part, so that a part of the filtered air can quickly dissipate heat to the cooling device, and the other part of the air can be used to supply air to the equipment in the front equipment compartment.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wind and sand filtering structure for a rail vehicle, comprising: A primary filter unit (100) is arranged on a side wall of a vehicle body (300), the primary filter unit (100) is provided with an air inlet on an outer surface of the vehicle body (300), the primary filter unit (100) is provided with a first air outlet and a second air outlet inside the vehicle body (300), the first air outlet is suitable for being connected to a heat dissipation pipe, and the heat dissipation pipe is suitable for extending to a heat dissipation area of ​​a cooling device of a rail vehicle; The secondary filter unit (200) is arranged inside the vehicle body (300), the air inlet end of the secondary filter unit (200) is connected to the second air outlet, and the air outlet end of the secondary filter unit (200) is connected to an air duct, which is suitable for connecting to air-using equipment.

2. The wind and sand filtering structure for a rail vehicle according to claim 1, wherein: The primary filter unit (100) comprises a shutter, and the shutter is suitable for being embedded in the side wall of the vehicle body (300).

3. The wind and sand filtering structure for a rail vehicle according to claim 1, wherein: The secondary filtration unit (200) comprises: Housing (210); A filter (220) installed at the air inlet end of the housing (210); A dust collecting box (230) is installed in the housing (210), a dust collecting chamber is formed in the dust collecting box (230), and the filter (220) is connected to the dust collecting chamber to allow sand and dust to fall into the dust collecting chamber; A fan (240) is installed in the housing (210); the fan (240) is connected to the dust outlet of the dust collecting box (230) and is used to extract sand and dust in the dust collecting chamber.

4. The wind and sand filtering structure for a rail vehicle according to claim 3, wherein: The filter (220) comprises a straight-through cyclone tube filter, and the dust collecting box (230) is located below the filter (220).

5. The wind and sand filtering structure for a rail vehicle according to claim 3, wherein: An annular connecting portion (250) is provided on the outer side wall of the shell (210) surrounding the air outlet end, and the air duct is suitable for being snap-connected to the annular connecting portion (250).

6. The wind and sand filtering structure for a rail vehicle according to claim 5, wherein: An adhesive member for connecting the air duct and the annular connecting portion (250) is provided between the air duct and the annular connecting portion (250).

7. The wind and sand filtering structure for a rail vehicle according to claim 6, wherein: The air duct is clamped in the annular connecting portion (250), and a first installation groove is provided on the inner circumference of the annular connecting portion (250) or the outer circumference of the air duct. The adhesive is suitable for being installed in the first installation groove, and the adhesive extends out of the notch of the first installation groove.

8. The wind and sand filtering structure for a rail vehicle according to claim 6, wherein: The air duct is clamped to the outside of the annular connecting portion (250), and a second installation groove is provided on the outer circumferential surface of the annular connecting portion (250) or the inner circumferential surface of the air duct. The adhesive is suitable for being installed in the second installation groove, and the adhesive extends out of the notch of the second installation groove.

9. The wind and sand filtering structure for a rail vehicle according to any one of claims 1 to 8, wherein: The air-using equipment comprises an electrical cabinet, and the electrical cabinet is suitable for being equipped with a micro-positive pressure mechanism for drawing filtered air into the electrical cabinet and discharging original air from the electrical cabinet.

10. A rail vehicle, comprising a vehicle body (300), wherein the vehicle body (300) is provided with a wind and sand filtering structure for a rail vehicle according to any one of claims 1 to 9.

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