Arc wrapper sheet type side wall and side wall structure of railway covered hopper car

Abstract

The invention discloses an arc wrapper sheet type side wall and a railway cover hopper car side wall structure, and relates to the technical field of road transportation equipment. The arc wrapping plate type side wall comprises an upper side beam, a first side wall plate, a second side wall plate and a third side wall plate. The upper end of the first side wallboard is connected with the upper side beam, and the lower end of the first side wallboard is connected with the second side wallboard; the lower end of the second side wallboard is connected with the upper end of the third side wallboard; the upper side beam comprises an upper hollow connecting plate and a lower flange which are integrally formed, a reinforcing rib is arranged in the upper hollow connecting plate, and the cross section of the lower flange is in a straight line form or a curve form; the first side wall plate, the second side wall plate and the third side wall plate are all arc-shaped single plates, and the curvature radiuses of the three are the same or different. According to the arc wrapper sheet type aluminum alloy welding structure side wall of the railway covered hopper car, the volume of the car can be obviously increased, and the self weight of the car body is reduced. And the first side wall plate, the second side wall plate and the third side wall plate adopt an aluminum alloy single-layer plate type longitudinal full-length splicing mode along the vehicle body, so that the welding deformation is reduced, and the processing property of the side wall is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road transportation equipment, and more particularly to the technical field of arc-wrapped plate-type side walls and railway covered hopper car side wall structures. Background Art

[0002] Railway covered hopper cars are used for railway transportation of bulk cargo to avoid rain and snow. They have two structures: straight plate side walls and arc-wrapped plate side walls. The following patents are currently available: The patent with publication number WO2015101104A1 and patent name "Side wall structure of hopper car" discloses the following content: A side wall structure of a hopper car, comprising: an integrally formed upper side beam, an integral side wall panel, an integrally formed lower side beam and a lower side wall; the upper side beam is riveted to the integral side wall panel (2) below; the side wall panel is riveted to the integrally formed lower side beam below; the side wall panel is a plate-column structure with an integral wall panel and a side column, and the side column is arranged inside the car body; the lower side beam (3) is riveted to the lower side wall below. The side wall structure of the hopper car provided by the present invention has an integral side column built-in side wall panel, which avoids the reduction of its own strength due to rivet holes and avoids the increase in weight and cost due to the use of rivets. In addition, the built-in side columns make it possible to utilize the space between the side columns, thereby increasing the volume of the car body.

[0003] The patent, with publication number CN104908761A and titled "A Railway Aluminum Alloy Hopper Car Side Wall Panel and Its Friction Stir Welding Method," discloses the following: A railway aluminum alloy hopper car side wall panel and a friction stir welding method, wherein the side wall panel is formed entirely by splicing aluminum alloy profiles; different aluminum alloy profiles are used according to the shape and requirements of the car body side wall panel, and the aluminum alloy profiles are welded together by friction stir welding to form a single aluminum alloy side wall panel. The friction stir welding method involves arranging the aluminum alloy profiles that make up the railway aluminum alloy hopper car side wall panel in sequence and welding the aluminum alloy profiles together by friction stir welding to form a single railway aluminum alloy hopper car side wall panel. The present invention uses aluminum alloy profiles to form the wall panel, which has the characteristics of stable structure, high strength, and beautiful appearance. Compared with the original method of riveting plates to the frame, the overall strength is much improved, and the appearance is very beautiful.

[0004] The patent with publication number CN102069309A and titled “A method for manufacturing a panel-wrapped side wall structure for a railway freight car” discloses the following: the steps are: (1) uncoiling and pre-treating the sheet material; (2) cutting and leveling the sheet material; (3) cutting and splicing the side wall panels; cutting N pieces of single sheets G01, G02…G0N of equal length according to the length and shape requirements of the side wall panels; dividing the N pieces of single sheets G01, G02…G0N of equal length into M groups in sequence, with 2 to 4 single sheets in each group, and (4) Roll the M large panels into M arc-shaped side wall panels according to the required curvature; (5) Assemble and weld the side walls: hoist the M arc-shaped side wall panels onto the side wall assembly base in sequence, pair the arc-shaped side wall panels, clamp and fix them, and then perform positioning welding. Then, use a welding trolley equipped with a flexible track to perform gap welding on the pairs. After turning the side wall panels over, clamp and position the inner side surfaces of the side wall panels, and use a welding trolley with a flexible track to perform continuous full welding on the inner side surfaces of the side wall panels.

[0005] The aforementioned patents and prior art utilize riveted connections between aluminum alloy upper side members and aluminum alloy straight-plate side walls, or welded connections between steel upper side members and steel arc-wrapped side walls. Riveting straight-plate side walls to upper side members increases the overall riveting workload, increasing manufacturing costs and reducing production efficiency. Arc-wrapped steel side walls are also structurally heavy, subject to significant welding deformation, and difficult to control side wall flatness after welding. Summary of the Invention

[0006] The purpose of the present invention is to solve the above technical problems and provide a circular arc plate-wrapped side wall and a railway covered hopper car side wall structure.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: One aspect of the present invention provides an arc-wrapped plate-type side wall, comprising a side wall body composed of an upper side beam, a first side wall panel, a second side wall panel, and a third side wall panel; The upper end of the first side wall panel is connected to the upper side beam, the lower end of the first side wall panel is connected to the second side wall panel; the lower end of the second side wall panel is connected to the upper end of the third side wall panel; The upper side beam includes an upper hollow connecting plate and a lower flange formed in one piece. The upper hollow connecting plate is provided with reinforcing ribs. The cross section of the lower flange is in a straight line or a curved line. The first side wall panel, the second side wall panel and the third side wall panel are all arc-shaped single panels, and the curvature radii of the first side wall panel, the second side wall panel and the third side wall panel are the same or different.

[0008] Specifically, the upper side beam is extruded from a hollow reinforced aluminum alloy structure. The side walls of the arc-wrapped aluminum alloy welded structure of the present invention can be spliced ​​using side wall panels of the same curvature radius or side wall panels of different curvature radii, thereby increasing the vehicle volume and reducing the vehicle's own weight. The first, second, and third side wall panels are made of aluminum alloy with a single-layer cross-section, which can fully utilize the vehicle's limits, increase the vehicle's volume, reduce its own weight, and facilitate riveted connection with other components. The first, second, and third side wall panels are made of aluminum alloy single-layer panels that are spliced ​​along the longitudinal length of the vehicle body, reducing welding deformation and improving the side wall's process performance.

[0009] In one embodiment, the upper hollow connecting plate includes an upper connecting plate, a left connecting plate, a right connecting plate, and a bottom connecting plate, wherein the bottom of the right connecting plate is connected to the lower flange, the upper connecting plate is tilted downward from right to left, the bottom connecting plate is tilted downward from left to right, and both the left connecting plate and the right connecting plate are tilted downward. The upper end of the left connecting plate is connected to the left end of the upper connecting plate, the lower end of the left connecting plate is connected to the left end of the bottom connecting plate, the right end of the bottom connecting plate is connected to the lower end of the right connecting plate, and the upper end of the right connecting plate is connected to the middle position of the upper connecting plate.

[0010] In one embodiment, the upper connecting plate, the left connecting plate, the right connecting plate and the bottom connecting plate form a quadrilateral with a larger top and a smaller bottom, and the reinforcing rib is connected between the left connecting plate and the right connecting plate.

[0011] Specifically, the upper side beam is an inclined aluminum alloy hollow reinforced structural profile, which increases the overall strength of the vehicle body and cooperates with the other major components of the vehicle body.

[0012] In one embodiment, the bottom of the lower flange is an inclined hook-angle structure, which includes a first connecting end and a first pad arranged on one side of the connecting end. The first connecting end and the first pad are integrally formed, and the first connecting end and the top of the first side wall panel form a V-shaped weld with a blunt edge.

[0013] In one embodiment, the first liner is arranged on the inner side of the first connecting end, and a downward inclined surface is provided at the connection between the first liner and the first connecting end to prevent the accumulation of fine particle cargo, and the bottom position of the first liner is lower than the bottom position of the first connecting end.

[0014] Specifically, the first liner can serve as a permanent liner when the upper side beam and the first side wall panel are welded, and the inclined surface on the top of the first liner can also prevent the accumulation of fine particle cargo.

[0015] In one embodiment, the first side wall panel and the second side wall panel are both single-layer panels, and the first side wall panel and the second side wall panel are curved panels with the same or different curvature radii.

[0016] In one embodiment, the bottom of the first side wall panel is an inclined hook-angle structure, which includes a second connecting end and a second gasket provided on one side of the second connecting end, the second connecting end and the second gasket being integrally formed, and the second connecting end and the top of the second side wall panel forming a V-shaped weld with a blunt edge; The second liner is arranged inside the second connecting end, and a downward inclined surface is provided at the connection between the second liner and the second connecting end to prevent accumulation of fine particle cargo. The bottom position of the second liner is lower than the bottom position of the second connecting end.

[0017] In one embodiment, the bottom of the second side wall panel is an inclined hook-angle structure, which includes a third connecting end and a third pad provided on one side of the third connecting end. The third connecting end and the third pad are integrally formed, and the third connecting end and the top of the third side wall panel form a V-shaped weld with a blunt edge. The third liner is arranged inside the third connecting end, and a downward inclined surface is provided at the connection between the third liner and the third connecting end to prevent accumulation of fine particle cargo. The bottom position of the third liner is lower than the bottom position of the third connecting end.

[0018] In one embodiment, the upper end of the third side wall panel is provided with a groove and forms a V-shaped weld with a blunt edge with the third connecting end of the second side wall panel; The lower end of the third side wall panel is in a straight line shape, which is convenient for assembly with the funnel.

[0019] In one embodiment, the upper side beam, the first side wall panel, the second side wall panel and the third side wall panel are all made of aluminum alloy.

[0020] Another aspect of the present invention provides a side wall structure of a railway covered hopper car, including an arc-clad plate side wall, a support beam, an aluminum alloy support seat, a first steel partition wall, and a second steel partition wall. The arc-clad plate side wall is welded to the aluminum alloy support seat, the support beam is riveted to the aluminum alloy support seat, and the arc-clad plate side wall is riveted to the first steel partition wall and the second steel partition wall respectively.

[0021] The beneficial effects of the present invention are as follows: 1. The arc-clad plate-type side wall of the present invention adopts a hollow reinforced upper side beam structure made of aluminum alloy to improve the overall strength of the side wall and reduce the deadweight of the side wall.

[0022] 2. The first side wall panel, the second side wall panel and the third side wall panel of the arc-wrapped side wall of the present invention are made of aluminum alloy with a single-layer plate cross-section. Compared with aluminum alloy profiles with a hollow cross-section, they can fully utilize the vehicle limit, increase the vehicle volume, reduce the dead weight, and facilitate the riveting connection between the side wall panels and the partition walls and end walls.

[0023] 3. The first side wall panel, the second side wall panel and the third side wall panel of the arc-wrapped side wall of the present invention are made of single-layer aluminum alloy and spliced ​​along the longitudinal length of the vehicle body, which reduces welding deformation and improves the side wall process performance.

[0024] 4. The upper side beam of the arc-wrapped side wall of the present invention and the joints at the first side wall panel, the second side wall panel, and the third side wall panel (inside the vehicle body) adopt an inclined hook-angle structure profile with a built-in gasket, which can serve as a permanent gasket when the two are welded and can also prevent the accumulation of fine-grained cargo in the vehicle.

[0025] 5. The first side wall panel, the second side wall panel and the third side wall panel of the arc-wrapped side wall of the present invention can be spliced ​​with the same curvature radius or with different curvature radii.

[0026] 6. The present invention solves the drawbacks of heavy weight, large welding amount, poor flatness of steel arc-clad plate side walls, and increased riveting workload and manufacturing cost caused by riveting aluminum alloy straight-wall side walls to upper side beams.

[0027] 7. The side wall structure of the covered railway hopper car of the present invention is connected to the roof and end wall by rivets, which has high connection strength and is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the cross section of the arc-wrapped plate-type side wall; Figure 2 This is a schematic diagram of the arc-wrapped plate side wall composition; Figure 3 It is a structural diagram of the upper side beam; Figure 4 is a schematic structural diagram of the first side wall panel; Figure 5 is a structural schematic diagram of the second side wall panel; Figure 6 is a structural diagram of the third side wall panel; Figure 7 This is a schematic diagram of the weld seams when the upper side beam and side wall panels, and the side wall panels and side wall panels are welded together; Figure 8 This is a side wall structure of a railway covered hopper car provided in an embodiment of the present application; Reference numerals: 1, side wall; 2, support base; 3, support beam; 4, first steel partition wall; 5, second steel partition wall 1.1, upper side beam; 1.2, first side wall panel; 1.3, second side wall panel; 1.4, third side wall panel; 1.1.1, stiffener; 1.1.2, lower flange; 1.1.3, first liner; 1.2.1, Second liner; 1.3.1. Third pad. DETAILED DESCRIPTION

[0030] To make the technical problems, technical solutions, and technical effects of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0034] Example 1 like Figures 1 to 7 As shown, this embodiment provides an arc-wrapped side wall structure, including an upper side beam 1.1, a first side wall panel 1.2, a second side wall panel 1.3 and a third side wall panel 1.4; the upper side beam 1.1, the first side wall panel 1.2, the second side wall panel 1.3 and the third side wall panel 1.4 are all made of aluminum alloy.

[0035] The upper end of the first side wall panel 1.2 is connected to the upper side beam 1.1, and the lower end of the first side wall panel 1.2 is connected to the second side wall panel 1.3; the lower end of the second side wall panel 1.3 is connected to the upper end of the third side wall panel 1.4; The upper side beam 1.1 comprises an integrally formed upper hollow connecting plate and a lower flange 1.1.2. The upper hollow connecting plate is provided with reinforcing ribs 1.1.1. The cross section of the lower flange 1.1.2 is a straight line or a curved line. The first side wall panel 1.2, the second side wall panel 1.3 and the third side wall panel 1.4 are all arc-shaped single panels, and the curvature radii of the first side wall panel 1.2, the second side wall panel 1.3 and the third side wall panel 1.4 are the same or different.

[0036] Specifically, the upper side beam 1.1 is extruded by adopting an aluminum alloy hollow reinforced structure; the arc-wrapped aluminum alloy welded structural side wall of the present invention can be spliced ​​by side wall panels of the same curvature radius or side wall panels of different curvature radii, thereby increasing the vehicle volume and reducing the vehicle body weight. The first side wall panel 1.2, the second side wall panel 1.3 and the third side wall panel 1.4 are made of aluminum alloy with a single-layer plate cross-section, which can make full use of the vehicle limit, increase the vehicle volume, reduce the dead weight, and facilitate riveting connection with other components. The first side wall panel 1.2, the second side wall panel 1.3 and the third side wall panel 1.4 are made of aluminum alloy single-layer plates that are spliced ​​along the longitudinal length of the vehicle body to reduce welding deformation and improve the side wall process performance.

[0037] Example 2 This embodiment is a further optimization based on the embodiment 1, specifically: The upper hollow connecting plate includes an upper connecting plate, a left connecting plate, a right connecting plate and a bottom connecting plate. The bottom of the right connecting plate is connected to the lower flange 1.1.2. The upper connecting plate is tilted downward from right to left, and the bottom connecting plate is tilted downward from left to right. Both the left connecting plate and the right connecting plate are tilted downward. The upper end of the left connecting plate is connected to the left end of the upper connecting plate, the lower end of the left connecting plate is connected to the left end of the bottom connecting plate, the right end of the bottom connecting plate is connected to the lower end of the right connecting plate, and the upper end of the right connecting plate is connected to the middle position of the upper connecting plate.

[0038] The upper connecting plate, the left connecting plate, the right connecting plate and the bottom connecting plate form a quadrilateral with a larger upper portion and a smaller lower portion, and the reinforcing rib 1.1.1 is connected between the left connecting plate and the right connecting plate.

[0039] Specifically, the upper side beam 1.1 is an inclined aluminum alloy hollow reinforced structural profile, which increases the overall strength of the vehicle body and cooperates with other large components of the vehicle body.

[0040] Example 3 This embodiment is a further optimization based on the second embodiment, specifically: The bottom of the lower flange 1.1.2 is an inclined hook-angle structure, which includes a first connecting end and a first pad 1.1.3 arranged on one side of the connecting end. The first connecting end and the first pad 1.1.3 are integrally formed, and the first connecting end and the top of the first side wall panel 1.2 form a V-shaped weld with a blunt edge.

[0041] The first liner 1.1.3 is arranged inside the first connecting end, and a downward inclined surface is provided at the connection between the first liner 1.1.3 and the first connecting end to prevent accumulation of fine particle cargo. The bottom position of the first liner 1.1.3 is lower than the bottom position of the first connecting end.

[0042] Specifically, the first liner 1.1.3 can serve as a permanent liner when the upper side beam 1.1 and the first side wall panel 1.2 are welded, and the inclined surface on the top of the first liner 1.1.3 can also prevent the accumulation of fine particle cargo.

[0043] Example 4 This embodiment is a further optimization based on the second embodiment, specifically: The first side wall panel 1.2 and the second side wall panel 1.3 are both single-layer panels. The first side wall panel 1.2 and the second side wall panel 1.3 are curved panels with the same or different curvature radii.

[0044] The bottom of the first side wall panel 1.2 is an inclined hook-angle structure, which includes a second connecting end and a second gasket 1.2.1 provided on one side of the second connecting end. The second connecting end and the second gasket 1.2.1 are integrally formed, and the second connecting end and the top of the second side wall panel 1.3 form a V-shaped weld with a blunt edge. The second liner 1.2.1 is arranged inside the second connecting end, and a downward inclined surface is provided at the connection between the second liner 1.2.1 and the second connecting end to prevent accumulation of fine particle cargo. The bottom position of the second liner 1.2.1 is lower than the bottom position of the second connecting end.

[0045] The bottom of the second side wall panel 1.3 is an inclined hook-angle structure, which includes a third connecting end and a third liner 1.3.1 provided on one side of the third connecting end. The third connecting end and the third liner 1.3.1 are integrally formed, and the third connecting end and the top of the third side wall panel 1.4 form a V-shaped weld with a blunt edge. The third liner 1.3.1 is arranged on the inner side of the third connecting end, and a downward inclined surface is provided at the connection between the third liner 1.3.1 and the third connecting end to prevent the accumulation of fine particle cargo. The bottom position of the third liner 1.3.1 is lower than the bottom position of the third connecting end.

[0046] The third side wall panel 1.4 has a groove at its upper end and forms a V-shaped weld with a blunt edge with the third connecting end of the second side wall panel 1.3; The lower end of the third side wall panel 1.4 is in a straight line shape, which is convenient for assembly with the funnel.

[0047] Example 5 See also Figure 8 An embodiment of the present application provides a side wall structure of a covered hopper car for railways, including an arc-wrapped plate type side wall structure disclosed in Example 4, and further including a support beam 2, an aluminum alloy support seat 3, a first steel partition wall 4, and a second steel partition wall 5. The arc-wrapped plate type side wall 1 is welded to the aluminum alloy support seat 3, the support beam 2 is riveted to the aluminum alloy support seat 3, and the arc-wrapped plate type side wall 1 is riveted to the first steel partition wall 4 and the second steel partition wall 5 respectively.

Claims

1. A circular arc plate-wrapped side wall, characterized by comprising an upper side beam (1.1), a first side wall panel (1.2), a second side wall panel (1.3), and a third side wall panel (1.4); The upper end of the first side wall panel (1.2) is connected to the upper side beam (1.1), and the lower end of the first side wall panel (1.2) is connected to the second side wall panel (1.3); the lower end of the second side wall panel (1.3) is connected to the upper end of the third side wall panel (1.4); the upper side beam (1.1) comprises an integrally formed upper hollow connecting plate and a lower flange (1.1.2), and a reinforcing rib ( 1.1.1), the cross section of the lower flange (1.1.2) is in a straight line form or a curved line form; the first side wall panel (1.2), the second side wall panel (1.3) and the third side wall panel (1.4) are all arc-shaped single panels, and the curvature radii of the first side wall panel (1.2), the second side wall panel (1.3) and the third side wall panel (1.4) are the same or different.

2. The arc-wrapped plate-type side wall according to claim 2, characterized in that: The upper hollow connecting plate includes an upper connecting plate, a left connecting plate, a right connecting plate and a bottom connecting plate. The bottom of the right connecting plate is connected to the lower flange (1.1.2). The upper connecting plate is tilted downward from right to left. The bottom connecting plate is tilted downward from left to right. The left connecting plate and the right connecting plate are both tilted downward. The upper end of the left connecting plate is connected to the left end of the upper connecting plate, the lower end of the left connecting plate is connected to the left end of the bottom connecting plate, the right end of the bottom connecting plate is connected to the lower end of the right connecting plate, and the upper end of the right connecting plate is connected to the middle position of the upper connecting plate.

3. The arc-wrapped plate-type side wall according to claim 2, characterized in that: The upper connecting plate, the left connecting plate, the right connecting plate and the bottom connecting plate form a quadrilateral with a larger upper portion and a smaller lower portion, and the reinforcing rib (1.1.1) is connected between the left connecting plate and the right connecting plate.

4. The arc-wrapped plate-type side wall according to claim 2, characterized in that: The bottom of the lower flange (1.1.2) is an inclined hook-angle structure, which comprises a first connecting end and a first liner (1.1.3) arranged on one side of the connecting end, the first connecting end and the first liner (1.1.3) being integrally formed, and the first connecting end and the top of the first side wall panel (1.2) forming a V-shaped weld with a blunt edge.

5. The arc-wrapped plate-type side wall according to claim 2, characterized in that: The first liner (1.1.3) is arranged on the inner side of the first connecting end, and a downwardly inclined slope is provided at the connection between the first liner (1.1.3) and the first connecting end to prevent accumulation of fine particle cargo, and the bottom position of the first liner (1.1.3) is lower than the bottom position of the first connecting end.

6. The arc-wrapped plate-type side wall according to claim 2, characterized in that: The first side wall panel (1.2) and the second side wall panel (1.3) are both in the form of single-layer panels, and the first side wall panel (1.2) and the second side wall panel (1.3) are curved panels with the same or different curvature radii.

7. The arc-wrapped plate-type side wall according to claim 6, characterized in that: The bottom of the first side wall panel (1.2) is an inclined hook-angle structure, the inclined hook-angle structure comprising a second connecting end and a second liner (1.2.1) arranged on one side of the second connecting end, the second connecting end and the second liner (1.2.1) being integrally formed, and the second connecting end and the top of the second side wall panel (1.3) forming a V-shaped weld with a blunt edge; The second liner (1.2.1) is arranged on the inner side of the second connecting end, and a downwardly inclined slope is provided at the connection between the second liner (1.2.1) and the second connecting end to prevent accumulation of fine particle cargo, and the bottom position of the second liner (1.2.1) is lower than the bottom position of the second connecting end.

8. The arc-wrapped plate-type side wall according to claim 7, characterized in that: The bottom of the second side wall panel (1.3) is an inclined hook-angle structure, which includes a third connecting end and a third liner (1.3.1) arranged on one side of the third connecting end, the third connecting end and the third liner (1.3.1) being integrally formed, and the third connecting end and the top of the third side wall panel (1.4) forming a V-shaped weld with a blunt edge; The third liner (1.3.1) is arranged on the inner side of the third connecting end, and a downwardly inclined slope is provided at the connection between the third liner (1.3.1) and the third connecting end to prevent accumulation of fine particle cargo, and the bottom position of the third liner (1.3.1) is lower than the bottom position of the third connecting end.

9. The arc-wrapped plate-type side wall according to claim 8, characterized in that: The upper end of the third side wall panel (1.4) is provided with a groove and forms a V-shaped weld with a blunt edge with the third connecting end of the second side wall panel (1.3); the lower end of the third side wall panel (1.4) is in a straight line; the upper side beam (1.1), the first side wall panel (1.2), the second side wall panel (1.3) and the third side wall panel (1.4) are all made of aluminum alloy.

10. A side wall structure of a railway covered hopper car, characterized in that: The arc-clad plate-type side wall comprises the arc-clad plate-type side wall according to any one of claims 1 to 9, characterized in that it further comprises a support beam (2), an aluminum alloy support seat (3), a first steel partition wall (4) and a second steel partition wall (5), the arc-clad plate-type side wall (1) is welded to the aluminum alloy support seat (3), the support beam (2) is riveted to the aluminum alloy support seat (3), and the arc-clad plate-type side wall (1) is riveted to the first steel partition wall (4) and the second steel partition wall (5), respectively.

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