Side wall, open wagon carriage and railway open wagon

Abstract

The invention relates to the technical field of railway open wagons, in particular to a side wall, an open wagon carriage and a railway open wagon. The side wall comprises the side wall plate and the lower side door, the side wall plate is provided with the opening, and the lower side door is arranged at the opening, so that the opening can be opened or closed; the side wall comprises a side wall plate, and the side wall plate and the lower side door are each of an integrally-formed fiber composite sandwich structure. According to the side wall, the open wagon carriage and the railway open wagon, the side wall plate and the lower side door are each of the integrally-formed fiber composite material interlayer structure, and the fiber composite material interlayer structures are light in weight and do not rust, so that the technical problems that in the related technology, the railway open wagon is large in dead weight and prone to rusting and corrosion can be solved, and the service life of the railway open wagon is prolonged. And the vehicle cargo transportation economy is improved.

Description

Technical Field

[0001] This invention relates to the field of railway open wagon technology, and more particularly to a side wall, an open wagon carriage, and a railway open wagon. Background Technology

[0002] Open wagons, as one of the main types of wagons used in railway transportation, are primarily used for transporting bulk commodities such as coal and ore. With the development needs of national economic growth, ecological sustainability, and the upgrading of people's livelihoods, my country's railway freight cars have been continuously designed with lightweight features to reduce their weight, increase their load capacity, effectively reduce energy consumption and carbon emissions in railway freight transportation, and lower overall logistics costs. Currently, my country's dedicated railway open wagons are generally made of carbon steel or stainless steel, which, compared to similar foreign wagons, suffer from problems such as heavy weight and susceptibility to rust and corrosion, resulting in poor economic efficiency in transporting goods. Summary of the Invention

[0003] This application provides a side wall, an open wagon carriage, and a railway open wagon, which to some extent improves the technical problems of railway open wagons being heavy and prone to rust and corrosion in related technologies.

[0004] In a first aspect, this application provides a side wall for use in an open wagon compartment. The side wall includes a side wall panel and a lower side door. The side wall panel has an opening, and the lower side door is disposed in the opening. The side wall includes a side wall panel, and both the side wall panel and the lower side door are integrally formed fiber composite sandwich structures.

[0005] In some embodiments, the sidewall panel includes an outer sidewall skin, a sidewall core material, and a sidewall reinforcement structure. Both the outer sidewall skin and the sidewall reinforcement structure are made of fiber-based composite materials. The sidewall reinforcement structure is disposed inside the outer sidewall skin, and the sidewall core material fills the gap formed between the outer sidewall skin and the reinforcement structure.

[0006] In some embodiments, the sidewall reinforcement structure includes a plurality of side columns, which are spaced apart along the length of the base frame.

[0007] In some embodiments, the side column has a hollow rectangular cross-section.

[0008] In some embodiments, the reinforcement structure further includes a plurality of backrest panel assemblies, each of which is disposed in a one-to-one correspondence with a plurality of side pillars, and the plurality of backrest panels protrude from the side of the outer skin of the sidewall away from the receiving space.

[0009] In some embodiments, the cross-section of the vehicle support panel is a solid rectangular structure.

[0010] In some embodiments, the reinforcement structure further includes an upper side beam connected to the top of the side column.

[0011] In some embodiments, the upper beam has a hollow cross-section.

[0012] In some embodiments, the side wall panel has a first recess on the side near the base frame, and the lower parts of the plurality of side columns extend to the first recess.

[0013] In some embodiments, the side wall further includes a handrail, and the side wall panel has second recesses on both sides, with the handrail disposed in one of the second recesses.

[0014] In some embodiments, the reinforcing structure further includes two reinforcing rib assemblies disposed inside the outer skin of the sidewall, with the two reinforcing rib assemblies corresponding one-to-one with the two second recesses.

[0015] In some embodiments, the lower side door includes an outer side door skin and a side door core material, the outer side door skin being made of a fiber-based composite material, and the side door core material being filled within the outer side door skin.

[0016] In some embodiments, the lower door is located in the middle of the side wall panel.

[0017] Secondly, this application also provides an open wagon body, including the side walls described above.

[0018] Thirdly, this application also provides a railway open wagon, including the open wagon carriages described above.

[0019] The beneficial effects of this application are as follows: The side wall, open wagon, and railway open wagon provided in this application are made of a single-piece fiber composite sandwich structure, which is lightweight and does not rust. This improves the technical problems of heavy weight and easy rust and corrosion of railway open wagons in related technologies, effectively reduces the weight of the car body side wall, increases the vehicle load capacity, improves the corrosion resistance of the car body side wall, and improves the economic efficiency of the vehicle in transporting goods. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0021] Figure 1 A schematic diagram of the structure of a railway open wagon provided in an embodiment of this application is shown.

[0022] Figure 2 It shows Figure 1 Structural diagram of the middle side wall.

[0023] Figure 3 It shows Figure 2 AA section view in the image.

[0024] Figure 4 It shows Figure 2 BB section view in the middle.

[0025] Figure 5 It shows Figure 1 A schematic diagram of the structure of the lower middle side door.

[0026] Figure 6 It shows Figure 5 DD section view in the image.

[0027] Figure 7 It shows Figure 2 CC section view in the image.

[0028] Figure 8 It shows Figure 1 Schematic diagram of the middle wall structure.

[0029] Figure 9 It shows Figure 8 AA section view in the image.

[0030] Figure 10 It shows Figure 9 A magnified view of part A in the image.

[0031] Figure 11 It shows Figure 1 A structural schematic diagram of the middle wall from another perspective.

[0032] Figure 12 It shows Figure 8 BB section view in the middle.

[0033] Figure 13 It shows Figure 1 A schematic diagram of the mid-base frame.

[0034] Explanation of reference numerals in the attached figures: 1-Railway open wagon, 10-Open wagon carriage, 100-Underframe, 110-Underframe main body, 111-Major crossbeam, 112-Minor crossbeam, 113-Sleeper beam, 114-End beam, 115-Side beam, 116-Longitudinal beam, 120-Floor, 130-Middle beam, 200-Side wall, 210-Side wall panel, 211-Side wall outer skin, 212-Side wall core material, 213-Side column, 214-Upper side beam, 215-Rack panel assembly, 2151-Rack panel, 216-First recess, 217-Second recess, 218-Reinforcing rib assembly, 219-Third recess, 2191-Guide ramp, 220-Lower side door, 221 - Side door outer skin, 222- Side door core material, 223- Hinge, 230- Handrail, 300- End wall, 310- End wall panel, 311- End wall outer skin, 312- End wall core material, 313- Upper beam, 3131- First end beam segment, 3132- Second end beam segment, 3133- Third end beam segment, 3134- Fourth end beam segment, 314- Recessed area, 315- First reinforcing rib, 3151- First inclined surface, 316- Second reinforcing rib, 3161- Second inclined surface, 317- Third reinforcing rib, 320- Connector, 312- First connecting surface, 313- Second connecting surface, 330- Foot pedal, 340- Handbrake. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, where there is no conflict, technical solutions from different embodiments can be combined with each other, and such combined technical solutions are also within the scope of protection claimed by this invention.

[0039] Open wagons, as one of the main types of wagons used in railway transportation, are primarily used for transporting bulk commodities such as coal and ore. With the development needs of national economic growth, ecological sustainability, and the upgrading of people's livelihoods, my country's railway freight cars have been continuously designed with lightweight features to reduce their weight, increase their load capacity, effectively reduce energy consumption and carbon emissions in railway freight transportation, and lower overall logistics costs. Currently, my country's dedicated railway open wagons are generally made of carbon steel or stainless steel, which, compared to similar foreign wagons, suffer from problems such as heavy weight and susceptibility to rust and corrosion, resulting in poor economic efficiency in transporting goods.

[0040] To improve the aforementioned technical problems to some extent, this application provides a side wall, an open wagon carriage, and a railway open wagon, which can improve the technical problems of heavy weight and easy rust and corrosion of railway open wagons in related technologies, and improve the economy of transporting goods by vehicle.

[0041] The embodiments of this application are described below with reference to the accompanying drawings: Please see Figure 1 This application provides a side wall 200 applied to an open wagon carriage 10, which is used in a railway open wagon 1. The open wagon carriage 10 includes a base frame 100, two side walls 200, and two end walls 300. The two side walls 200 are arranged opposite each other along the width direction of the base frame 100, and the two end walls 300 are arranged opposite each other along the length direction of the base frame 100. The base frame 100, the two side walls 200, and the two end walls 300 together form a top-opening accommodating space.

[0042] Please see Figures 2-7 In this embodiment of the application, the side wall 200 includes a side wall panel 210 and a lower side door 220. The side wall panel 210 is provided with an opening communicating with the accommodating space, and the lower side door 220 is disposed at the opening, so that the opening can be opened or closed. Both the side wall panel 210 and the lower side door 220 are integrally formed fiber composite sandwich structures.

[0043] The lower side door 220 facilitates the manual removal of accumulated cargo from the open wagon 1, which is primarily used for transporting bulk goods such as coal and ore. After mechanized unloading, workers can enter the storage space through the lower side door 220 to remove any remaining cargo. This allows workers to remove accumulated cargo from the wagon more conveniently and efficiently, eliminating the need for long-distance, high-intensity handling, thus significantly improving working conditions and increasing efficiency. Specifically, the lower side door 220 can be located in the middle of the side wall panel 210 to shorten the handling distance for manual cargo removal and reduce labor intensity.

[0044] A carbon fiber composite sandwich structure refers to a layered composite structure formed by bonding a core material (such as PVC foam) to a panel made of fiber-based composite material (such as carbon fiber skin or glass fiber skin) with an adhesive. This invention does not strictly limit the carbon fiber composite material used; any carbon fiber composite material conventionally used in the art can be used. Furthermore, the material of the sandwich layer is not strictly limited; for example, it can be a honeycomb sandwich, a foam sandwich, etc.

[0045] The side wall 200 provided in this application embodiment is made of a fiber-based composite material sandwich structure, with both the side wall panel 210 and the lower side door 220 being integrally formed. This fiber-based composite material sandwich structure is lightweight and rust-free. Therefore, compared to traditional steel open wagons, the open wagon 10 provided in this application embodiment is lighter, rust-free, and has a longer service life. This improves the technical problems of heavy weight and susceptibility to rust and corrosion in related technologies, thereby enhancing the economic efficiency of transporting goods. In some embodiments, the side wall panel includes an outer side wall skin, a side wall core material, and a side wall reinforcement structure. Both the outer side wall skin and the side wall reinforcement structure are made of fiber-based composite materials. The reinforcement structure is located inside the outer side wall skin, and the side wall core material fills the gap formed between the outer side wall skin and the reinforcement structure.

[0046] In some embodiments, the sidewall panel 210 includes a sidewall outer skin 211, a sidewall core material 212, and a sidewall reinforcement structure. Both the sidewall outer skin 211 and the sidewall reinforcement structure are made of fiber-based composite materials. The reinforcement structure is located inside the sidewall outer skin 211, and the sidewall core material 212 fills the gap formed between the sidewall outer skin 211 and the reinforcement structure.

[0047] The outer skin 211 of the sidewall wraps around the internal sidewall reinforcement structure and the sidewall core material 212, forming a sandwich structure, and is integrally formed by vacuum infusion molding. The vacuum infusion molding process is existing technology and will not be described in detail here.

[0048] The sidewall reinforcement structure is a structural component embedded inside the outer skin 211 of the sidewall during the vacuum infusion process to enhance the overall or local strength and stiffness of the sidewall panel 210. The sidewall core material 212 is a lightweight foam material used to fill the internal cavities of the outer skin 211 and the internal side columns 213, serving as a filler for the integrally molded sidewall 200 and increasing the overall strength and stiffness of the sidewall panel 210.

[0049] The side wall reinforcement structure includes multiple side columns 213, an upper side beam 214, and a backrest assembly 215. The multiple side columns 213 are arranged at intervals along the length of the underframe 100 to improve the overall strength and rigidity of the side wall 200. The side columns 213 have a hollow rectangular cross-section and can be manufactured using a fiber composite material pultrusion molding process to reduce manufacturing costs.

[0050] Multiple side panel assemblies 215 are correspondingly arranged with multiple side pillars 213, and multiple side panels 2151 protrude from the side of the outer skin 211 of the side wall away from the accommodating space. The side panel assembly 215 includes multiple side panels 2151 spaced apart along the height direction of the open wagon body 10 to ensure the contact requirements of the tipper operation and improve the force on the vehicle when the tipper is in operation. The cross-section of the side panel 2151 can be a rectangular solid cross-section, and it is manufactured by pultrusion molding process of fiber composite materials to reduce manufacturing costs.

[0051] The upper side beam 214 has an irregular hollow cross-section and can be manufactured using a fiber-reinforced composite material pultrusion process to reduce manufacturing costs. The upper side beam 214 is located at the top of the side column 213, providing skeletal support for the side wall 200.

[0052] It should be noted that traditional steel open wagons have many reinforcing ribs in the walls to support the pressure of the cargo. These steel structures themselves have a certain thickness, and after assembly, the walls are relatively thick. In contrast, in the fiber composite sandwich structure, the outer composite skin and the inner foam core and composite beams and columns work together to form an integral load-bearing shell. Compared with the traditional 213-type side wall 200 structure, it can greatly reduce the overall thickness of the wall panels and increase the vehicle volume while ensuring overall strength and rigidity.

[0053] Similarly, the lower side door 220 includes an outer side door skin 221 and a side door core material 222. The outer side door skin 221 is made of a fiber-based composite material, and the side door core material 222 is filled inside the outer side door skin 221. The fiber-based composite material outer skin of the lower side door 220 wraps around the core material to form a sandwich structure, and is integrally formed using a vacuum infusion process. The open wagon body 10 also includes a hinge 223 for connecting the lower side door 220 and the side wall panel 210, allowing the lower side door 220 to open or close. The hinge 223 may be made of carbon steel and is fixedly connected to the integrally formed lower side door 220 by bolts or rivets.

[0054] In some embodiments, the side wall panel 210 has a first recess 216 on the side near the base frame 100, and the lower parts of multiple side columns 213 extend to the first recess 216, with the first recess 216 recessed towards the interior of the receiving space. The bottom of the side wall panel 210 needs to be connected to the base frame 100 by bolts or rivets. The provision of the first recess 216 facilitates the fixed connection of the bottom of the side wall panel 210 to the base frame 100 by bolts or rivets, so that the outer surface of the side wall panel 210 can be kept as flat as possible with the outer surface of the side beam 115 of the base frame 100, resulting in a smoother and more aesthetically pleasing appearance. The lower parts of the multiple side columns 213 extending to the first recess 216 can improve the strength and rigidity of the bottom of the side wall panel 210.

[0055] In some embodiments, the side wall 200 also includes a handrail 230 to meet the climbing needs of personnel during vehicle shunting operations. The side wall panel 210 has second recesses 217 on both sides, and the handrail 230 is disposed in one of the second recesses 217. Since railway locomotives and rolling stock have dimensional limitations, disposing of the handrail 230 in one of the second recesses 217 prevents the handrail 230 from protruding excessively from the outer surface of the side wall panel 210, thus avoiding impacting the volume of the accommodating space.

[0056] In some embodiments, the sidewall reinforcement structure further includes two reinforcing rib assemblies 218, which are disposed inside the outer skin 211 of the sidewall. The two reinforcing rib assemblies 218 are correspondingly arranged with the two second recesses 217 to enhance the strength and rigidity at both ends of the sidewall panel 210. The placement of the reinforcing rib assemblies 218 within the second recesses 217 also prevents them from protruding excessively from the outer surface of the sidewall panel 210, thus affecting the volume of the accommodating space. Specifically, the reinforcing rib assembly 218 may include a plurality of horizontal ribs spaced vertically at intervals.

[0057] In some embodiments, the side wall panel 210 has a third recess 219 with an opening provided in the third recess 219 to prevent the lower door 220 from protruding too much from the outer surface of the side wall panel 210, thereby affecting the volume of the accommodating space. Furthermore, a guide slope 2191 is provided on the lower side of the third recess 219 to improve the accumulation of spilled goods.

[0058] Based on the same inventive concept, this application also provides an open wagon body 10, including the side wall 200 described above. The beneficial effects of the open wagon body 10 provided in this application embodiment are the same as those of the side wall 200 described above, and will not be repeated here.

[0059] In some embodiments, the open wagon 10 includes an end wall 300, which includes an end 310. The end wall 300 plate is also an integrally formed fiber composite sandwich structure, which can further improve the technical problems of the heavy weight and easy rust and corrosion of railway open wagons 1 in related technologies, and improve the economy of transporting goods by the vehicle.

[0060] Please see Figures 8-12 In some embodiments, the end wall panel 310 includes an end wall outer skin 311, an end wall core material 312, and an end wall reinforcement structure. The end wall reinforcement structure is disposed inside the end wall outer skin 311. Both the end wall outer skin 311 and the end wall reinforcement structure are made of fiber composite materials. The end wall core material 312 fills the gap formed between the end wall outer skin 311 and the reinforcement structure.

[0061] The outer skin 311 of the end wall encloses the internal end wall reinforcement structure and the end wall core material 312, forming a sandwich structure, and is integrally molded through a vacuum infusion process. The end wall reinforcement structure is embedded inside the outer skin 311 structure during the vacuum infusion process, serving as a structural component to enhance the overall or local strength and stiffness of the end wall plate 310. The end wall core material 312 is a lightweight foam material used to fill the internal cavities of the outer skin 311 and the internal side columns 213, serving as a filler for the integrally molded end wall 300 and increasing the overall strength and stiffness of the end wall plate 310.

[0062] In some embodiments, the end wall reinforcement structure includes an upper beam 313, which is disposed on top of the outer skin 311 of the end wall and provides skeletal support for the end wall panel 310. The upper beam 313 has a hollow cross-section. Specifically, the upper beam 313 may have an irregular hollow cross-section and is manufactured using a pultrusion molding process for fiber-based composite materials to reduce manufacturing costs.

[0063] In some embodiments, the end wall 300 further includes a connector 320, which includes a first connecting surface 312 and a second connecting surface 313 arranged at an angle. The cross section of the upper end beam 313 has a first end beam segment 3131 and a second end beam segment 3132 arranged at an angle. The first end beam segment 3131 mates with the first connecting surface 312, and the second end beam segment 3132 mates with the second connecting surface 313.

[0064] The connector 320 can be a corner tie. The connector 320 has two vertically arranged connecting parts. The end wall plate 310 and the side wall plate 210 are also vertically arranged. One connecting part is used to connect the end wall plate 310, and the other connecting part is used to connect the side wall plate 210. The connecting part for connecting the end wall plate 310 includes a vertically arranged first connecting surface 312 and a second connecting surface 313. The cross-section of the upper beam 313 also has a vertically arranged first end beam segment 3131 and a second end beam segment 3132 to facilitate the installation of the corner tie. The first end beam segment 3131 mates with the first connecting surface 312, and the second end beam segment 3132 mates with the second connecting surface 313, thereby improving the connection strength. The first end beam segment 3131 and the first connecting surface 312 can be connected by bolts or rivets, and the second end beam segment 3132 and the second connecting surface 313 can be connected by bolts or rivets. It is understood that the bottom of the end wall plate 310 is also provided with a corner tie that connects to the base frame 100.

[0065] In some embodiments, the cross section of the upper beam 313 further includes a third end beam segment 3133 and a fourth end beam segment 3134. The first end beam segment 3131 and the third end beam segment 3133 are arranged opposite to each other along the thickness direction of the end wall plate 310. The first end beam segment 3131 connects the top of the first end beam segment 3131 and the third end beam segment 3133, and the fourth end beam segment 3134 connects the bottom of the first end beam segment 3131 and the third end beam segment 3133. The third end beam segment 3133 and the fourth end beam segment 3134 are arranged at an included angle.

[0066] The first end beam segment 3131, the second end beam segment 3132, the third end beam segment 3133, and the fourth end beam segment 3134 together form a closed section, with the second end beam segment 3132 located at the top and the fourth end beam segment 3134 located at the bottom. Specifically, the first end beam segment 3131 and the third end beam segment 3133 are vertically arranged, the second end beam segment 3132 is horizontally arranged, and the third end beam segment 3133 and the fourth end beam segment 3134 are arranged at an angle, that is, the fourth end beam segment 3134 is a sloping side. The bottom sloping side provides a smooth transition path for the fiber cloth without sharp corners, which facilitates the integral molding and fabrication of the fiber composite material layup and vacuum infusion process of the outer skin of the end wall 311. This allows the upper end beam 313 to be smoothly combined with the outer skin of the end wall 311, forming a high-quality whole in the vacuum infusion process.

[0067] Specifically, the cross-section of the upper beam 313 is in the shape of a right trapezoid, and the hypotenuse of the cross-section of the upper beam 313 is located at the bottom of the cross-section of the upper beam 313.

[0068] In some embodiments, a recessed area 314 is provided on one side of the end wall panel 310. The recessed area 314 is provided on the side of the end wall panel 310 away from the receiving space to facilitate the arrangement of handrails 230, foot pedals 330 and handbrakes 340, so as to meet the needs of vehicle handbrake operation and personnel climbing.

[0069] In some embodiments, the end wall reinforcement structure further includes a first reinforcing rib 315 and a second reinforcing rib 316, which are arranged alternately and protrude from one side of the end wall plate 310, forming a recessed region 314 between the first reinforcing ribs 315 and the second reinforcing ribs 316. The arrangement of the first reinforcing ribs 315 and the second reinforcing ribs 316 can improve the strength and rigidity of the end wall plate 310.

[0070] Specifically, two first reinforcing ribs 315 are provided along the width direction of the end wall plate 310, and the two first reinforcing ribs 315 are spaced apart along the height direction of the end wall plate 310. A second reinforcing rib 316 is provided along the height direction of the end wall plate 310, and the second reinforcing rib 316 is located in the middle of the end wall plate 310. The two first reinforcing ribs 315 and the second reinforcing rib 316 together form six recessed areas 314. The handrail 230, foot pedal 330, and handbrake 340 can be installed in one of the recessed areas 314 as needed.

[0071] In some embodiments, the first reinforcing rib 315 is arranged along the width direction of the end wall plate 310, and the first reinforcing rib 315 has a first inclined surface 3151 on both sides along the height direction of the end wall plate 310, so as to facilitate the integral molding of the fiber composite material layup and vacuum injection process of the outer skin 311 of the end wall. That is, the setting of the first inclined surface 3151 can avoid 90-degree right angles and provide a smooth transition inclined surface to ensure that the fiber cloth can be laid smoothly and avoid resin accumulation and air bubbles.

[0072] Similarly, the second reinforcing rib 316 is arranged along the height direction of the end wall plate 310, and the second reinforcing rib 316 has a second inclined surface 3161 on both sides along the width direction of the end wall plate 310, so as to facilitate the integral molding of the fiber composite material layup and vacuum injection process of the outer skin 311 of the end wall.

[0073] Specifically, the cross-section of the first reinforcing rib 315 and the second reinforcing rib 316 can be an isosceles trapezoid. The symmetrical inclined surfaces on both sides of the isosceles trapezoid can meet the process requirements of fiber laying and vacuum injection. Moreover, the foam core material is very easy to process into precise isosceles trapezoidal grooves by cutting or milling, making it easy to process.

[0074] In some embodiments, the end wall reinforcement structure further includes a third reinforcing rib 317, which is disposed at the bottom of the outer skin and located within the recessed area 314, to enhance the strength and rigidity of the bottom of the end wall plate 310.

[0075] In some embodiments, the side portion of the end wall plate 310 has a first side edge and a second side edge arranged at an angle. The first side edge is located on one side of the end wall plate 310 along its width direction, and the second side edge is located on one side of the end wall plate 2310 along its thickness direction. The first side edge and the second side edge may be arranged perpendicularly to facilitate fixed connection with the side wall plate 210 by bolts or rivets.

[0076] Please see Figure 13 In some embodiments, the underframe 100 may adopt a flat-bottom structure, eliminating the bottom bathtub compared to traditional railway open wagons, which can effectively improve the convenience of vehicle inspection and maintenance. The underframe 100 includes a floor 120, an underframe body 110, and a center beam 130. The floor 120 and the center beam 130 are respectively located on both sides of the underframe body 110, and the floor 120 is located within the accommodating space; wherein, the middle part of the center beam 130 protrudes away from the floor 120.

[0077] The main body 110 of the underframe includes large crossbeams 111, small crossbeams 112, bolster beams 113, end beams 114, side beams 115, and longitudinal beams 116. All components are made of metal and are assembled by fixed connections, providing the main load-bearing function for vehicle cargo transportation. The floor 120 is located within the accommodating space. Multiple large crossbeams 111 are arranged at intervals along the length of the underframe 100 on the floor 120, and multiple small crossbeams 112 are also arranged at intervals along the length of the underframe 100 on the floor 120. The large crossbeams 111 and small crossbeams 112 are staggered. Side beams 115 and end beams 114 are provided on both sides of the floor 120, and multiple longitudinal beams 116 are arranged at intervals along the width of the underframe 100 on the floor 120. The central beam 130 is set along the length of the floor 120, and the middle part of the central beam 130 protrudes to the side away from the floor 120, that is, the cross section of the central beam 130 is fish-belly shaped, which can effectively improve the vertical stiffness of the vehicle.

[0078] In some embodiments, the small crossbeam 112 includes two crossbeam segments arranged at an angle, one of which is fitted into the floor 120. The two crossbeam segments can be arranged vertically, meaning the cross-sectional shape of the small crossbeam 112 is L-shaped, and the length of one crossbeam segment can be greater than the length of the other. The longer crossbeam segment is arranged horizontally and fixed to the bottom of the floor 120 by welding or bolts, while the shorter crossbeam segment extends downwards. Thus, the cross-section of the small crossbeam 112 is an open structure, not forming a closed space. This allows airflow and vibration during vehicle operation to easily blow away or shake off water and dirt accumulated on the shorter crossbeam segment. Even if residue remains, its contact area with the air is large, and it dries very quickly, effectively reducing water accumulation and lowering its corrosion rate.

[0079] Similarly, the longitudinal beam 116 comprises two longitudinal beam segments arranged at an angle, one of which is fitted into the floor 120. The two longitudinal beam segments can be arranged vertically, meaning the smaller longitudinal beam 116 has an L-shaped cross-section, and one segment can be longer than the other. The longer segment is horizontally positioned and fixed to the bottom of the floor 120 by welding or bolts, while the shorter segment extends downwards. This means the smaller segment has an open cross-section, not forming a closed space. During vehicle operation, airflow and vibration easily blow away or shake off water and dirt accumulated on the shorter segment. Even if residue remains, its large contact area with air allows it to dry very quickly, effectively reducing water accumulation and corrosion rate.

[0080] Based on the same inventive concept, this application also provides a railway open wagon 1, including the open wagon carriage 10 described above. The beneficial effects of the railway open wagon 1 provided in this application are the same as those of the open wagon carriage 10 described above, and will not be repeated here.

[0081] In summary, the open wagon 10 and railway open wagon 1 provided in this application embodiment can effectively reduce the vehicle's weight and increase its load-bearing capacity. The "sandwich" sidewall 200 structure, compared to the traditional sidewall 200 structure with side pillars 213, effectively reduces the thickness of the sidewall 200 section, increasing the vehicle's volume. The underframe 100 adopts a flat-bottom structure, eliminating the bottom bathtub compared to traditional railway open wagons, effectively improving the convenience of vehicle inspection and maintenance. Lower side doors 220 are provided on both sides of the middle of the vehicle, shortening the handling distance for manually clearing accumulated cargo and reducing labor intensity.

[0082] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0083] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A sidewall for use in an open wagon compartment, characterized in that, The side wall includes a side wall panel and a lower side door. The side wall panel has an opening, and the lower side door is located at the opening. The side wall includes a side wall panel, and both the side wall panel and the lower side door are integrally formed fiber composite sandwich structures.

2. The sidewall according to claim 1, characterized in that, The sidewall panel includes an outer sidewall skin, a sidewall core material, and a sidewall reinforcement structure. Both the outer sidewall skin and the sidewall reinforcement structure are made of fiber-based composite materials. The sidewall reinforcement structure is located inside the outer sidewall skin, and the sidewall core material fills the gap formed between the outer sidewall skin and the reinforcement structure.

3. The sidewall according to claim 2, characterized in that, The sidewall reinforcement structure includes multiple side columns, which are spaced apart along the length of the base frame.

4. The sidewall according to claim 3, characterized in that, The side column has a hollow rectangular cross-section.

5. The sidewall according to claim 2, characterized in that, The reinforcement structure also includes multiple backrest panel assemblies, each of which is corresponding to one of the multiple side pillars, and the multiple backrest panels protrude from the side of the outer skin of the side wall away from the receiving space.

6. The sidewall according to claim 5, characterized in that, The cross-section of the vehicle support panel is a solid rectangular structure.

7. The sidewall according to claim 2, characterized in that, The reinforcing structure also includes an upper side beam connected to the top of the side column.

8. The sidewall according to claim 7, characterized in that, The upper beam has a hollow cross-section.

9. The sidewall according to claim 2, characterized in that, The side wall panel has a first recess on the side near the base frame, and the lower parts of the plurality of side columns extend to the first recess.

10. The sidewall according to any one of claims 1-9, characterized in that, The side wall also includes a handrail, and the side wall panel has a second recess on both sides, with the handrail disposed in one of the second recesses.

11. The sidewall according to claim 10, characterized in that, The reinforcing structure also includes two reinforcing rib assemblies, which are disposed inside the outer skin of the side wall, and the two reinforcing rib assemblies are respectively arranged in a one-to-one correspondence with the two second recesses.

12. The sidewall according to any one of claims 1-9, characterized in that, The lower side door includes an outer side door skin and a side door core material. The outer side door skin is made of a fiber composite material, and the side door core material is filled inside the outer side door skin.

13. The sidewall according to any one of claims 1-9, characterized in that, The lower door is located in the middle of the side wall panel.

14. An open wagon carriage, characterized in that, Includes the sidewall as described in any one of claims 1-13.

15. A railway open wagon, characterized in that, Including the open wagon body as described in claim 14.

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