Structure for improving sealing performance of top cover of urban rail vehicle

Abstract

The utility model discloses a structure for improving the sealing performance of a top cover of an urban rail vehicle, and belongs to the technical field of welding of top covers of rail vehicles. A sealing plate is arranged on the side wall of the top cover edge beam, an embedded plate is arranged on the side wall of the sealing plate, an air conditioner partition wall is arranged on one side of the sealing plate, an air conditioner bottom plate is arranged at the bottom of the sealing plate, a lap joint groove is formed in one side of the top of the embedded plate, and a groove is formed in the other side of the top of the embedded plate. The air conditioner bottom plate is in lap joint with the top cover edge beam, the air conditioner bottom plate and the top cover edge beam are covered with the sealing plate and the embedded plate to form a three-layer plate structure, the embedded plate can be in lap joint with one side of the top of the air conditioner bottom plate conveniently through the lap joint groove, and the grooves are formed in one side of the top of the air conditioner bottom plate, so that the strength and the crack resistance are improved; a positioning plate is fixedly arranged on the top of the air conditioner bottom plate. According to the structural design, welding seams are not dense, the defects of cracks and incomplete fusion of joints are not prone to occurring after panel embedding, and the sealing performance of the top cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicle roof welding, and more particularly to a structure for improving the sealing performance of a rail vehicle roof. Background Art

[0002] At present, the thickness of the urban rail roof panel is 2.5mm. There are 8 pieces in a section of the roof, which form a three-layer plate structure with the sealing plate and the air-conditioning bottom plate, and are welded together with the air-conditioning partition wall and the roof side beam. Due to the dense welds, thin sealing plates and panels, and many welding joints, a large number of cracks and unfused defects appear after welding, which seriously affect the sealing performance of the roof.

[0003] The sealing of the urban rail roof is very important for urban rail vehicles. If the sealing is not good, the accumulated water on the roof is likely to enter the car through cracks and unfused positions, damaging the equipment and lines in the car, which will directly affect the safety of rail vehicle operation.

[0004] Therefore, it is of great significance to design a structure and welding method for components such as panels on the rail vehicle roof that can prevent cracks and unfused defects at the three-layer thin plate position. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of the present invention is to provide a structure for improving the sealing performance of the roof of urban rail vehicles, so as to solve the problem raised in the above background technology that the existing welds are dense and the panels are thin, which easily lead to cracks and unfused joints, seriously affecting the sealing performance of the roof.

[0007] 2. Technical solution

[0008] A structure for improving the sealing performance of a roof of an urban rail vehicle comprises a roof side beam, a sealing plate provided on a side wall of the roof side beam, a panel provided on a side wall of the sealing plate, an air-conditioning partition provided on one side of the sealing plate, an air-conditioning bottom plate provided on the bottom of the sealing plate, a lap groove provided on one side of the top of the panel, a groove provided on the other side of the top of the panel, and a pointed end provided on the top of the panel.

[0009] Preferably, a plurality of grooves are provided on one side of the top of the air-conditioning base plate, and a positioning plate is provided on the top of the air-conditioning base plate.

[0010] Preferably, the groove is HY type, and the welding positions are all flat butt welding.

[0011] Preferably, the groove is 55°, the panel thickness is 5.0-6.0 mm, and the panel edge thickness is 2.5-3.5 mm.

[0012] Preferably, the height of the panel is flush with that of the sealing plate, and the size and position of the overlapping groove match the size and position of the air conditioner base plate.

[0013] Preferably, the welding method adopts manual pulse MIG welding, the welding wire diameter is 1.2mm, high-purity argon shielding gas, and the butt joint and right angle joint welding current is 145-175A.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model forms a two-layer plate structure by first overlapping the air-conditioning bottom plate on the top cover side beam, and then covers the air-conditioning bottom plate and the top cover side beam with a sealing plate and a panel to form a three-layer plate structure. The panel is conveniently overlapped on the top side of the air-conditioning bottom plate through the overlapping groove, thereby reducing the contact area between the panel and the air-conditioning bottom plate, improving the strength and crack resistance. In this way, the sealing performance of the thin three-layer plate is sufficiently guaranteed, and the tip abuts the side wall of the sealing plate, and the groove facilitates welding.

[0017] Secondly, multiple grooves are opened on one side of the top of the air conditioner base plate, and a positioning plate is fixed on the top of the air conditioner base plate; the structural design of the utility model has sparse welds, and cracks and unfused joints are less likely to occur after the panels are inserted, thereby improving the sealing performance of the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the sealing structure of the urban rail roof after the assembly of panels and other components of the utility model;

[0019] Figure 2 It is a partial structural diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the panel structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the bottom plate of the air conditioner of the present utility model;

[0022] Figure 5 It is a schematic diagram of the sealing structure of the urban rail roof of the utility model without the panel components assembled;

[0023] Explanation of the numbers in the figure: 1. Top cover side beam; 2. Sealing plate; 3. Inlay panel; 4. Air conditioning partition wall; 5. Air conditioning bottom plate; 6. Overlap groove; 7. Bevel; 8. Tip; 9. Groove; 10. Positioning plate. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, “plurality” means two or more, unless otherwise clearly defined.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0027] See also Figure 1-5 ,The utility model provides a technical solution:

[0028] A structure for improving the sealing performance of the roof of an urban rail vehicle comprises a roof side beam 1, a sealing plate 2 welded to the side wall of the roof side beam 1, a panel 3 welded to the side wall of the sealing plate 2, an air conditioning partition 4 welded to one side of the sealing plate 2, an air conditioning base plate 5 welded to the bottom of the sealing plate 2, a lap groove 6 formed on one side of the top of the panel 3, a groove 7 formed on the other side of the top of the panel 3, and a tip 8 formed on the top of the panel 3. The utility model first overlaps the air conditioning base plate on the roof side beam to form a two-layer plate structure, and then covers the sealing plate and panel on the air conditioning base plate and the roof side beam to form a three-layer plate structure. The overlapping groove 6 facilitates the panel 3 to overlap the top side of the air conditioning base plate 5, reducing the contact area between the panel 3 and the air conditioning base plate 5, improving strength and crack resistance. In this way, the sealing performance of the thin three-layer plate is sufficiently guaranteed, reducing the contact between the tip 8 and the side wall of the sealing plate 2, and facilitating welding through the groove 7.

[0029] Specifically, a plurality of grooves 9 are formed on one side of the top of the air conditioning base plate 5, and a positioning plate 10 is fixed to the top of the air conditioning base plate 5. The positioning plate 10 quickly positions the sealing plate 2 to prevent it from being scattered during welding. The plurality of grooves 9 also reduce the contact area between the sealing plate 2 and the air conditioning base plate 5, thereby improving the crack resistance of the structure that enhances the sealing performance of the urban rail vehicle roof.

[0030] Furthermore, the groove is HY type and the welding position is flat butt welding. By changing the surface contact form to the line form, the welding heat input is reduced and the welding deformation is reduced.

[0031] It is worth noting that the groove 7 is 55 degrees, the thickness of the panel 3 is 5.0-6.0 mm, and the edge thickness of the panel 3 is 2.5-3.5 mm. By thickening the panel 3, welding deformation is reduced, thereby preventing weld fracture.

[0032] It is worth noting that the height of the panel 3 is flush with that of the sealing plate 2, and the size and position of the overlap groove 6 match those of the air conditioner base plate 5. The overlap groove 6, which matches the size and position of the air conditioner base plate 5, facilitates a tighter connection between the panel 3 and the air conditioner base plate 5, facilitating a tighter seal after welding.

[0033] In addition, the welding method uses manual pulse MIG welding, with a wire diameter of 1.2mm, high-purity argon shielding gas, and a welding current of 145-175A for flat butt and flat angle joints. Manual pulse MIG welding improves welding performance.

[0034] Working principle: When this device is needed to improve the structural welding of the roof of urban rail vehicles, the air-conditioning bottom plate is overlapped on the top cover side beam to form a two-layer plate structure, and then the sealing plate and the panel are covered on the air-conditioning bottom plate and the top cover side beam to form a three-layer plate structure. The overlapping groove 6 makes it easy to overlap the panel 3 on the top side of the air-conditioning bottom plate 5, reducing the contact area between the panel 3 and the air-conditioning bottom plate 5, improving the strength and crack resistance. In this way, the sealing of the thin three-layer plate is sufficiently guaranteed, and the tip 8 is abutted against the side wall of the sealing plate 2, and the groove 7 is used to facilitate welding, and the positioning plate 10 is used to quickly position the panel 3. The sealing plate 2 is positioned to prevent it from being scattered during welding. The contact area between the sealing plate 2 and the air-conditioning base plate 5 is reduced by multiple grooves 9, which is convenient for improving the crack resistance of the structure that improves the sealing of the urban rail vehicle roof. By changing the surface contact form to the line form, the welding heat input is reduced, the welding deformation is reduced, and the welding deformation is reduced by thickening the panel 3, thereby preventing the weld from breaking. The overlapping groove 6 that matches the size and position of the air-conditioning base plate 5 is convenient for making the connection between the panel 3 and the air-conditioning base plate 5 tighter, which is convenient for the sealing after welding, and the welding effect is improved by manual pulse MIG welding.

[0035] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A structure for improving the sealing performance of a roof of an urban rail vehicle, comprising a roof side beam (1), characterized in that: The side wall of the roof side beam (1) is provided with a sealing plate (2), the side wall of the sealing plate (2) is provided with a panel (3), one side of the sealing plate (2) is provided with an air conditioning partition wall (4), the bottom of the sealing plate (2) is provided with an air conditioning bottom plate (5), one side of the top of the panel (3) is provided with a lap groove (6), the other side of the top of the panel (3) is provided with a groove (7), and the top of the panel (3) is provided with a tip (8).

2. The structure for improving the sealing performance of the urban rail vehicle roof according to claim 1, characterized in that: A plurality of grooves (9) are provided on one side of the top of the air-conditioning base plate (5), and a positioning plate (10) is provided on the top of the air-conditioning base plate (5).

3. The structure for improving the sealing performance of the urban rail vehicle roof according to claim 2, characterized in that: The groove (7) is HY type, and the welding positions are all flat butt welding.

4. The structure for improving the sealing performance of the urban rail vehicle roof according to claim 3, characterized in that: The groove (7) is 55°, the panel (3) has a thickness of 5.0-6.0 mm, and the edge thickness of the panel (3) is 2.5-3.5 mm.

5. The structure for improving the sealing performance of the urban rail vehicle roof according to claim 4, characterized in that: The height of the panel (3) is flush with that of the sealing plate (2), and the size and position of the overlapping groove (6) match the size and position of the air conditioner base plate (5).

6. The structure for improving the sealing performance of the urban rail vehicle roof according to claim 5, characterized in that: The welding method adopts manual pulse MIG welding, the wire diameter is 1.2mm, high-purity argon shielding gas, and the welding current of flat butt and flat angle joints is 145-175A.

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