Sunshade protective cover for flexible air duct on roof of motor train unit

Abstract

A motor train unit roof soft air duct sunshade protective cover is characterized by comprising an outer cover, an inner cover, an outer cover bottom plate and an inner cover bottom plate, and the outer cover and the inner cover are connected in a nested mode; the outer cover and the outer cover bottom plate are tightly connected to form a closed structure, the inner cover and the inner cover bottom plate are tightly connected to form a closed structure, the outer cover bottom plate and the inner cover bottom plate are in lap joint to form a complete outer side closed structure, and therefore the inner cover and the inner cover bottom plate form an inner square sun shade, the outer cover and the outer cover bottom plate form an outer square sun shade, the inner square sun shade and the outer square sun shade are tightly in lap joint, and the inner square sun shade and the outer square sun shade are tightly in lap joint. And the mounting seats are firmly fixed at the two ends of the soft air duct to finally form the whole protective cover with a closed structure and comprehensive protection, so that the dual functions of strong ultraviolet resistance and reliable water resistance are realized.

Description

Technical Field

[0001] This invention belongs to the field of rail transit technology, and in particular relates to a sunshade cover for the roof duct of a rail vehicle. Background Technology

[0002] The air conditioning and ventilation system of a high-speed train is a key component in ensuring passenger comfort, comprising a main rigid air duct and branch flexible air ducts. The rigid air ducts are typically located in the center of the carriage, beneath the roof or floor, and run along the longitudinal centerline of the carriage, serving as the main air supply duct. Flexible air ducts branch off from the sides or specific interfaces of the rigid air ducts, connecting to various air outlets on the roof of the carriage, acting as branch air ducts.

[0003] During the long-term operation of high-speed trains, the roof-mounted flexible air duct is an essential and critical ventilation component, and its operational stability directly affects the overall performance of the vehicle. In the existing technology, the sunshade cover used for the roof-mounted flexible air duct of high-speed trains is a "U"-shaped sheet metal structure. This design forms basic protection for the flexible air duct through the three sides of the sheet metal part. Although it has the advantages of simple installation process and simple structure, it has revealed significant defects in actual use.

[0004] On the one hand, the "U"-shaped structure has a limited sunshade coverage area and cannot effectively block strong ultraviolet rays from irradiating the surface material of the flexible air duct. Long-term exposure will lead to aging of the air duct seals, a decrease in material strength, and a shortened service life of the flexible air duct. On the other hand, the waterproof design of this structure has shortcomings. In rainy or snowy weather, rainwater can easily seep in through the joints of the sheet metal parts, causing problems such as corrosion of internal components and failure of electrical components, which seriously affects the safe and stable operation of existing EMU trains. Therefore, there is an urgent need for a sunshade cover with excellent UV resistance and reliable waterproof performance to make up for the shortcomings of existing technology. Summary of the Invention

[0005] The core objective of this invention is to solve the technical problems of poor sunshade effect and weak waterproof performance of existing soft air duct sunshade covers on the roof of high-speed trains, and to provide a high-speed train sunshade cover with reasonable structural design and strong adaptability.

[0006] To achieve the above-mentioned objectives, this invention provides a flexible air duct sunshade cover for a high-speed train roof, characterized in that it comprises an outer cover, an inner cover, an outer cover base plate, and an inner cover base plate. Both the outer and inner covers are door-shaped structures and are integrally formed from a top plate and two side plates, respectively. The top plate of the outer cover is bent downwards on both sides, and the top plate of the inner cover is bent downwards on one side and upwards on the other. One downward-bent edge of the outer cover overlaps with the upward-bent edge of the inner cover, forming a nested connection between the outer and inner covers. The outer cover base plate and the inner cover... The four sides of the base plate are bent upwards and connected to the bottom of the outer and inner covers to form a complete outer enclosure. At the same time, a continuous bent edge on the outer cover base plate overlaps the bent edge at the bottom of the inner cover, so that the inner cover and the inner cover base plate form an inner "U"-shaped sunshade, and the outer cover and the outer cover base plate form an outer "U"-shaped sunshade. The inner and outer "U"-shaped sunshades are tightly overlapped and firmly fixed to both ends of the flexible air duct by the mounting brackets, finally forming a whole protective cover with a closed structure and comprehensive protection, achieving the dual functions of strong UV resistance and reliable waterproofing.

[0007] Furthermore, it also includes a mounting base, which is connected to the outer side of the inner wall of the side plate of the outer cover and the inner cover, for connecting the flexible air duct guide tube.

[0008] Furthermore, the inner side of the mounting base is provided with an arc-shaped groove that matches the shape of the flexible air duct guide tube, which enhances the connection stability with the guide tube, and a threaded hole is opened at the center of the bottom of the arc-shaped groove.

[0009] Furthermore, the outer cover has a smooth transition edge to reduce airflow resistance and avoid wind noise during operation.

[0010] Furthermore, both the outer cover and the inner cover have pre-set mounting holes for connecting the mounting base and their respective base plates with bolts.

[0011] Furthermore, the inner walls of the mounting holes are all chamfered to facilitate the smooth installation and removal of bolts, while also improving the structural strength around the holes and preventing cracking during long-term use.

[0012] Furthermore, the top plate of the outer cover arches upwards in the middle to facilitate drainage.

[0013] A rail vehicle includes a flexible air duct, wherein the flexible air duct is the flexible air duct described above.

[0014] Assembly process:

[0015] First, the inner cover is fixedly installed: the inner cover is attached to the preset installation position of the flexible air duct guide tube, and the bolts are passed through the mounting holes of the inner cover and fastened to the mounting base to make the inner cover and the flexible air duct guide tube fit firmly together, thus completing the basic fixation of the inner layer protection.

[0016] Subsequently, the outer cover is assembled: The outer cover is lapped on the outside of the inner cover, ensuring that the edges of the two are completely overlapped and aligned. It is fixed to the mounting seat by bolts passing through the mounting holes of the outer cover, so that the inner and outer two-layer "door"-shaped cover bodies form a nested sunshade structure, achieving double ultraviolet ray blocking.

[0017] Install the bottom plate of the outer cover: Align the bottom plate of the outer cover with the bottom mounting position of the outer cover, and fasten it to the mounting hole of the outer cover by bolts passing through the mounting holes on the bottom plate of the outer cover, so that the bottom plate of the outer cover and the outer cover form a complete outer closed structure, blocking the infiltration path of rainwater on the outside.

[0018] Finally, complete the assembly of the bottom plate of the inner cover: Insert the bottom plate of the inner cover under the fixed bottom plate of the outer cover, ensure that there is no gap at the insertion point, and fasten and connect it to the mounting hole of the inner cover by bolts passing through the mounting hole of the bottom plate of the inner cover.

[0019] Through the above assembly process, the inner cover and the bottom plate of the inner cover form an inner "mouth"-shaped sunshade, and the outer cover and the bottom plate of the outer cover form an outer "mouth"-shaped sunshade. The inner and outer two-layer "mouth"-shaped sunshades are closely lapped and firmly fixed at both ends of the soft air duct through the mounting seat, finally forming a complete protective cover with a closed structure and comprehensive protection, realizing the dual functions of strong ultraviolet resistance and reliable waterproofing.

[0020] The significant advantages and outstanding progress of the present invention compared with the prior art are as follows:

[0021] 1. The ultraviolet resistance performance is greatly improved: The inner and outer double-layer "mouth"-shaped nested structure is adopted, and the outer cover and the inner cover form a double ultraviolet ray blocking barrier. Compared with the single-layer "ji"-shaped structure, the sunshade coverage range is more comprehensive, which can effectively block the direct sunlight at different angles, significantly reduce the erosion of ultraviolet rays on the material of the soft air duct, delay the aging of the seal and the decline of the material strength, and greatly extend the service life of the soft air duct.

[0022] 2. The waterproof performance is more reliable: Through the double-layer closed design of "outer cover + outer bottom plate" and "inner cover + inner bottom plate", as well as the close lapping structure between various components, multiple waterproof lines are formed. Rainwater needs to break through the multiple barriers of the outer cover body, the outer bottom plate, the inner bottom plate, and the inner cover body in turn, effectively avoiding the problem of rainwater infiltrating from the gap in the existing structure. The waterproof sealing performance is significantly better than the traditional "ji"-shaped structure, and it can meet the operation requirements under complex weather conditions such as rain and snow.

[0023] 3. The structural stability is strong: The modular design and bolt fastening connection method are adopted, and each component is firmly assembled, and the overall structure has high stiffness. It can withstand the air flow load and vibration impact during the high-speed operation of the EMU, ensuring that the protective cover does not loosen or deform during long-term use, and guaranteeing the continuity and stability of the protection function.

[0024] 4. Balancing adaptability and ease of installation: All components are manufactured using sheet metal processing technology, ensuring high dimensional accuracy and precise fit to the installation dimensions of existing EMU roof-mounted flexible air ducts, eliminating the need for significant modifications to the original vehicle structure. Furthermore, the assembly process is clear, with bolts used to securely connect each component, simplifying installation and facilitating future maintenance and replacement. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a partial cross-sectional view of the present invention;

[0027] Figure 3 This is a schematic diagram of the outer casing structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the outer cover base plate structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the inner cover structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the inner cover bottom plate structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the mounting base structure of the present invention;

[0032] The components are as follows: 1. Outer cover; 101. Lower bend of the outer cover; 2. Inner cover; 201. Upper bend of the inner cover; 3. Outer cover base plate; 301. Continuous bend of the outer cover base plate; 4. Inner cover base plate; 401. Upper bend of the inner cover base plate; 5. Mounting seat; 501. Groove; 6. Outer cover mounting hole; 7. Lower mounting hole of the outer cover; 8. Mounting hole of the outer cover base plate; 9. Inner cover mounting hole; 10. Lower mounting hole of the inner cover; 11. Mounting hole of the inner cover base plate; 12. Threaded hole. Detailed Implementation

[0033] Reference Figure 1 The entire protective cover features a double-layered, nested "U"-shaped closed structure, tightly fitting the outer ends of the flexible air duct guide tube on the roof of the EMU. The outer cover 1, as the outer protective component, completely wraps around the outer cover 2, with their edges seamlessly overlapping to form a double sunshade barrier. The bottom plate 3 of the outer cover is completely fitted to the bottom of the outer cover 1, forming an outer closed plane. The bottom plate 4 of the inner cover overlaps under the bottom plate 3 and is firmly connected to the inner cover 2, together forming an inner closed structure. The double bottom plate design enhances the waterproof effect. The mounting bases 5 are symmetrically distributed on both sides of the protective cover, serving as core fixing components, and are firmly connected to the outer cover 1, inner cover 2, and flexible air duct guide tube, providing reliable stress support for the entire protective cover.

[0034] Reference Figure 2 The longitudinal center section of the protective cover has an overlap between the lower bent edge 101 of the outer cover and the upper bent edge 201 of the inner cover to achieve a tight fit. The outer cover can move on the upper surface of the inner cover to achieve a telescopic nested connection between the outer cover and the inner cover. There are no gaps in the overlap area, which effectively blocks the path of ultraviolet rays to seep in from the gaps. The bottom plate 3 of the outer cover and the bottom of the outer cover 1, as well as the bottom plate 4 of the inner cover and the inner cover 2, are all connected by an integrated seal with no obvious gaps at the connection. The continuous bent edge 301 of the bottom plate of the outer cover overlaps with the bent edge 401 of the bottom plate of the inner cover to form a double waterproof sealing structure, which greatly improves the waterproof reliability.

[0035] The inner side of the mounting base 5 is provided with an arc-shaped groove 501 that is adapted to the shape of the flexible air duct guide tube. The inner wall of the groove is designed with a fitting structure to enhance the connection stability with the guide tube. After the bolt passes through the outer cover mounting hole 6 and the inner cover mounting hole 9, it is fastened to the threaded hole 12 of the mounting base 5. The bolt head is embedded in the countersunk hole reserved in the component and does not protrude from the surface of the component to avoid wind resistance and abnormal noise during the operation of the EMU.

[0036] Reference Figure 3 The outer cover 1 is shaped like an outer "door," formed by an integral bending process of the top plate and two side plates. The top plate and the two side plates are vertically connected to form a complete outer protective outline, which can maximize the coverage of the outer area of ​​the flexible air duct. The edges of the top plate and the side plates are rounded, without sharp corners, which not only avoids scratches during assembly, but also reduces airflow resistance when the train is running.

[0037] On both side panels of the outer cover 1, symmetrical mounting holes 6 are provided for connection with the mounting base 5. The holes are evenly distributed to ensure balanced force distribution during connection. On both ends of the top plate, symmetrical mounting holes 7 are provided for connection with the bottom plate 3. The hole positions are precisely matched to the mounting holes on the bottom plate 3. The inner walls of all mounting holes are chamfered to facilitate smooth installation and removal of bolts, while also improving the structural strength around the holes to prevent cracking during long-term use.

[0038] Reference Figure 4 The outer cover base plate 3 is a rectangular flat plate structure, formed by sheet metal stamping. Its overall dimensions perfectly match the bottom of the outer cover 1, ensuring a complete fit after assembly. The four corners of the base plate are rounded to avoid damage from sharp corners and improve structural safety. Symmetrical mounting holes 8, which match the mounting holes 7 on the lower part of the outer cover, are provided on the base plate. The number and distribution of these holes correspond one-to-one with the mounting holes 7 on the lower part of the outer cover 1, ensuring the accuracy and firmness of the connection.

[0039] The upper surface of the base plate remains smooth and flat to ensure a tight seal with the bottom of the outer cover 1; the lower surface is provided with a transverse reinforcing rib structure to increase structural rigidity and prevent the base plate from deforming due to stress or environmental factors during long-term use, thus ensuring the stability of the waterproof function.

[0040] Reference Figure 5 The inner cover 2 has an overall structure that matches the outer cover 1, and its size is slightly smaller than the outer cover 1 to ensure a tight nesting fit. Its top plate and side plates are also formed by an integral bending process, and the inner side wall is smooth and flat, which facilitates the fit with the flexible air duct guide tube. The upper area of ​​the side plate has symmetrical inner cover mounting holes 9 for connecting with the mounting base 5, and the hole positions are precisely corresponding to the threaded holes of the mounting base 5. The lower area of ​​the side plate has symmetrical inner cover lower mounting holes 10 for connecting with the inner cover bottom plate 4, ensuring the firmness of the connection with the bottom plate.

[0041] During assembly, the lower surface of the top plate of the inner cover 2 can be provided with a longitudinal guide rib structure to play a positioning and guiding role. The distribution of the guide ribs is adapted to the inner side wall of the outer cover 1 to ensure that the inner cover 2 and the outer cover 1 can be quickly and accurately connected, while enhancing the tightness of the connection between the two covers.

[0042] Reference Figure 6 The inner cover base plate 4 has a rectangular structure, and its dimensions perfectly match the bottom of the inner cover 2, ensuring a complete fit after assembly. The edges of the inner cover base plate have upward-bent flanges, which are perpendicular to the base plate, enhancing both the structural strength of the inner cover base plate itself and improving the sealing at the overlap with the outer cover base plate 3. Symmetrical inner cover base plate mounting holes 11, which are adapted to the lower mounting holes 10 of the inner cover, are provided on the inner cover base plate. The hole positions correspond one-to-one with the lower mounting holes 10 of the inner cover, ensuring the accuracy and firmness of the connection between the two.

[0043] The overlapping area of ​​the inner cover bottom plate 4 and the outer cover bottom plate 3 is provided with a sealing and protective structure, which further enhances the waterproof sealing of the overlapping area, while avoiding wear caused by direct friction between metal parts and extending the service life of the parts.

[0044] Reference Figure 7 The mounting base 5 has a block-like structure and is made of high-strength materials, possessing sufficient structural strength to withstand the weight of the protective cover and the airflow load during train operation. The mounting base 5 has an arc-shaped groove 501 that precisely matches the shape of the flexible air duct guide tube. A threaded hole 12 is opened in the groove for connection with the outer cover 1 and the inner cover 2. The inner wall of the groove is smoothed to ensure a tight fit with the flexible air duct guide tube, improving connection stability.

[0045] The upper and lower surfaces of the mounting base 5 are both positioned using threaded holes 12, which serve as positioning guides during assembly, ensuring the accurate installation position of the mounting base 5 with other components and avoiding assembly deviations. This figure comprehensively presents the structural features of the mounting base 5 in all dimensions, the fitting shape of the arc-shaped groove, and the distribution of threaded holes and positioning pin holes, clarifying its assembly relationship with the flexible air duct guide tube, outer cover 1, and inner cover 2, providing comprehensive technical basis for processing, manufacturing, and installation positioning.

Claims

1. A flexible ventilation duct sunshade cover for the roof of a high-speed train, characterized in that: The outer cover (1), inner cover (2), outer cover bottom plate (3), and inner cover bottom plate (4) are included. The outer cover (1) and inner cover (2) are both door-shaped structures and are integrally formed by a top plate and two side plates, respectively. The top plate of the outer cover (1) is bent downward on both sides, and the top plate of the inner cover (2) is bent downward on the outer side and upward on the inner side. The lower bent edge (101) of the outer cover overlaps with the upper bent edge (201) of the inner cover, so that the outer cover (1) and the inner cover (2) form a telescopic interlocking structure. Sleeve connection; the four sides of the outer cover bottom plate (3) and the inner cover bottom plate (4) are all bent upwards and connected to the bottom of their respective outer cover and inner cover to form a complete outer closure. At the same time, the continuous bent edge (301) of the outer cover bottom plate overlaps on the bottom bent edge (401) of the inner cover, so that the inner cover and the inner cover bottom plate form an inner "mouth" shaped sunshade, and the outer cover and the outer cover bottom plate form an outer "mouth" shaped sunshade. The inner and outer "mouth" shaped sunshades are tightly overlapped and fixed at both ends of the flexible air duct.

2. The flexible ventilation duct sunshade cover for a high-speed train roof according to claim 1, characterized in that: It also includes a mounting base (5), which is connected to the outer side of the inner wall of the side plate of the outer cover (1) and the inner cover (2) for connecting the flexible air duct guide tube.

3. A flexible wind tunnel sunshade cover for the roof of a high-speed train according to claim 2, characterized in that: The mounting base (5) has an arc-shaped groove (501) on its inner side that is adapted to the shape of the flexible air duct guide tube, and a threaded hole (12) is opened at the center of the bottom of the arc-shaped groove.

4. A flexible wind tunnel sunshade cover for the roof of a high-speed train according to claim 1, characterized in that: The outer cover (1) has a smooth transition at the edge.

5. A flexible wind tunnel sunshade cover for the roof of a high-speed train according to claim 1, characterized in that: Both the outer cover (1) and the inner cover (2) have pre-set mounting holes for connecting the mounting base and their respective base plates.

6. A flexible wind tunnel sunshade cover for the roof of a high-speed train according to claim 5, characterized in that: The inner walls of the mounting holes are all chamfered.

7. A flexible wind tunnel sunshade cover for the roof of a high-speed train according to claim 1, characterized in that: The top plate of the outer cover (1) arches upwards in the middle to form an arch shape.

8. A rail vehicle comprising a flexible air duct, characterized in that: The flexible air duct is the flexible air duct described in claims 1-7.

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