A railway hopper car for transporting powdery goods

Abstract

This invention discloses a railway hopper car for transporting powdery goods, relating to the technical field of railway hopper cars. It includes a car body, a pneumatic control system, a coupler buffer device, an air braking device, a manual braking device, and a bogie. A hydraulic control system is located at the lower part of the car body. The car body includes a chassis, with two hoppers with double-sealing structures at the bottom of the chassis. The two hoppers are distributed on both sides of the chassis's central beam. Two side walls are provided on both sides of the chassis, with end walls at each end of the side walls. A roof is provided above the side walls and end walls. A discharge port is provided at the bottom of the hoppers, and a flip-up bottom door with a two-stage locking device is provided at the discharge port. The roof includes a fixed top cover assembly and a movable top cover assembly positioned directly above the fixed top cover. This invention has a reasonable design and solves the problems of the side walls not balancing strength and space, top cover jamming, easy accidental opening of the bottom door, and poor sealing in hopper cars.

Description

Technical Field

[0001] The present invention relates to the technical field of railway hopper cars, and more specifically to the technical field of railway hopper cars for transporting powdery goods. Background Art

[0002] Currently, there are various types of hopper cars operating on China's railways. Generally, they are divided into grain hopper cars, ballast hopper cars, coal hopper cars, etc. according to the different transported goods. Among these types, grains are goods with relatively small particle sizes. Grain hopper cars generally mainly transport particulate matters such as corn, soybeans, and rapeseed. For powdery goods, such as flour, etc., general gondola cars are usually used to load them in bagged form. In this form, during the circulation process, it has to go through multiple packaging disassembly processes, with low production efficiency, low transportation safety, large cargo losses, high labor intensity, and high consumption of packaging materials and human resources.

[0003] Due to the relatively large size of the hopper opening and the bottom door and the limitation of manufacturing processes, the flatness of the "mouth"-shaped hopper opening and the flatness of the bottom door panel are out of tolerance, and the sealing effect is poor when they are used in combination. Therefore, when transporting fine particulate powdery goods, if only the first-layer sealing structure is adopted, it may cause cargo leakage.

[0004] Currently, when loading grains on the top cover of railway freight cars and existing railway grain and flour hopper cars and other railway fine particulate freight cars, the moving distance of a single rectangular loading hatch cover is only about 1225 mm, the total length of the loading hatch is about 5 m, and the total length of the loading hatch only accounts for about 30% of the roof length and is discontinuous, so the grain loading efficiency is not high. The rectangular top cover is driven by a pneumatic motor, a sprocket, a transmission chain, etc., and is provided with tracks, pulleys, etc. The types and quantities of parts are relatively many, the driving device structure is complex, and the product cost is relatively high. When the sliding track is deformed or the roller bearing is rusted, it will cause the top cover to be stuck during movement, which is not convenient for use, and the maintenance cost will also increase accordingly.

[0005] Currently, the side wall components of hopper cars in China basically adopt two forms. One is a straight-wall type, and the other is an arc type. The straight-wall side wall can make greater use of the clearance space and increase the vehicle volume, but the stiffness of the side wall panel is not enough, and it is easy to produce outward bulging deformation after loading goods, which is not convenient for subsequent vehicle maintenance and use. The arc side wall has better stiffness than the straight-wall side wall, but it cannot make full use of the clearance space, the vehicle volume is small, which is not conducive to the subsequent operation of the vehicle. }

[0006] Currently, the bottom doors of railway hopper cars in my country are mainly located at the bottom of the car body. One type uses pneumatic, hydraulic, or electronic control methods for opening and closing, while the other uses a mechanical linkage mechanism that utilizes ground facilities for automatic opening and closing. The first type of bottom door mainly includes pull-out and rotary types. Pneumatic, hydraulic, and electronic control devices directly act on the bottom door to drive it open and close. This method has a complex structure, low transmission efficiency, and complicated operation; if the equipment malfunctions, the bottom door can easily open unexpectedly. The second type of bottom door mainly uses a flip-type design, where rollers from the bottom door's transmission device contact ground facilities to achieve automatic opening and closing. This method requires additional ground contact facilities, increasing costs.

[0007] Therefore, in response to the national policy of shifting grain transportation methods from "bagged grain transportation" to "bulk grain transportation", there is an urgent need to design a new railway hopper car for transporting powdery goods. Summary of the Invention

[0008] The purpose of this invention is to solve the technical problems of existing hopper cars, such as the side walls not being able to balance strength and space, top cover jamming, bottom door being easy to open accidentally, and poor sealing. This invention provides a railway hopper car for transporting powdery goods.

[0009] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0010] This invention provides a railway hopper car for transporting powdery goods, including a car body, a pneumatic control system, a coupler buffer device, an air braking device, a manual braking device, and a bogie. The lower part of the car body is equipped with a hydraulic control system. The car body includes a chassis, and two hoppers with double sealing structures are set at the bottom of the chassis. The two hoppers are distributed on both sides of the middle beam of the chassis. Two side walls are set on both sides of the chassis, and end walls are set at both ends of the two side walls. The upper part of the side walls and end walls is provided with a car roof. The bottom of the hoppers is provided with a discharge port, and a flip-type bottom door with a two-stage locking device is provided at the discharge port. The car roof includes a fixed top cover assembly and a movable top cover assembly set on the fixed top cover assembly.

[0011] Specifically, the base frame is a bottom support frame, the side walls and end walls enclose the surroundings, the funnel encloses the bottom and unloading is achieved through opening and closing, and the rectangular top cover and the circular loading port cover cover the top and loading is achieved through opening and closing.

[0012] In one embodiment, the fixed top cover assembly has a full-length rectangular loading port, and the perimeter of the full-length rectangular loading port is provided with double-eared arc-shaped hollow sealing strips for waterproofing and other sealing purposes. The movable top cover assembly includes a rectangular top cover that is pneumatically controlled and can move horizontally at the rectangular loading port, and the rectangular top cover has multiple circular loading ports (attached). Figure 4The vehicle has five circular loading ports, each equipped with a circular loading port cover with a manual locking device. The rectangular top cover and the circular loading port covers cover the top and allow loading to be carried out by opening and closing. The circular loading ports are designed for loading equipment that handles powdery goods, while the long rectangular loading ports are designed for loading equipment that handles granular bulk goods. A long walkway is provided on one side of the roof to facilitate the operation of the circular loading port covers by the operators.

[0013] In one embodiment, a drive shaft device is built into both sides of the roof. Each drive shaft device includes a cylinder hinged between the roof and the end wall. Each cylinder is connected to the pneumatic control system through an air circuit. The pneumatic control system controls the two cylinders to extend or retract synchronously, thereby opening or closing the rectangular top cover to realize the loading operation of granular bulk goods.

[0014] In one embodiment, the manually operated locking device includes a rotating support, a rotating shaft, and a handle; the rotating support is disposed on a rectangular top cover near the circular loading port cover, the rotating shaft is rotatably disposed on the rotating support, and the rotating shaft is welded and fixed to the handle.

[0015] The rotating shaft adopts an eccentric design, and the rotating shaft is equipped with a working part for pressing the round loading port cover and a clearance part for avoiding the round loading port cover;

[0016] The rotating shaft includes a U-shaped part in the middle, rotating rods set on the outer sides of the two side walls of the U-shaped part, the outer bottom surface of the U-shaped part is the working part, and the inner groove of the U-shaped part is the clearance part.

[0017] A Z-shaped pressure plate that mates with a U-shaped component is provided on one side of the circular loading port cover. One side of the Z-shaped pressure plate is fixed to the loading port cover, and the other side extends to the bottom of the U-shaped component. When the loading port cover is closed, the working part presses the Z-shaped pressure plate. When the loading port cover is opened, the U-shaped component is rotated, and the clearance part is located on the Z-shaped pressure plate.

[0018] The distance from the axis of the rotating rod to the inner bottom of the U-shaped part is L1. The orthographic projection of the axis of the rotating rod onto the Z-shaped pressure plate is the projection line. The distance from the end of the Z-shaped pressure plate to the projection line is L2. The distance L1 is greater than the distance L2. The distance from the axis of the rotating rod to the outer bottom of the U-shaped part is greater than or equal to the distance from the axis of the rotating rod to the Z-shaped pressure plate.

[0019] The inner bottom surface of the U-shaped part is a flat release surface, and the outer bottom surface of the U-shaped part is an arc-shaped locking surface. The locking surface is tangentially engaged with the Z-shaped pressure plate.

[0020] Specifically, the rotating shaft adopts an eccentric design, with the rotating shaft center maintaining a certain spatial distance from the locking surface (i.e., the outer bottom surface of the U-shaped part). The locking surface is arc-shaped, which can effectively reduce friction. The release surface (the inner bottom surface of the U-shaped part) is a planar structure, which can avoid obstructing the end of the Z-shaped pressure plate when rotated to the vertical position.

[0021] The two straight arm ends of the handle are fixed to the respective ends of the rotating rods in a welding form, and the release surface is perpendicular to the overall handle. The rotating shaft is welded and fixed to the handle, and the release surface of the rotating shaft is perpendicular to the handle, forming a 90-degree angle. The rotating shaft rotates along with the handle around the fulcrum of the support base to lock and open the roof loading hatch.

[0022] Working principle: When locking the loading hatch, place the handle in the vertical position and make the release surface perpendicular to the loading hatch. Close the loading hatch and rotate the handle outwards. The locking surface (i.e., the outer bottom surface of the U-shaped part) is in a tangential mating state with the Z-shaped pressing plate and gradually locks as the rotation angle of the handle increases. When the U-shaped part is in the horizontal position and the lowest point of the locking surface contacts the Z-shaped pressing plate, it is the locking dead point position. At this time, continue to press and rotate the handle, and the loading hatch will not accidentally open after being locked. When opening the loading hatch, rotate the handle upwards, the locking surface rotates away from the pressing plate, and at the same time the release surface avoids the Z-shaped pressing plate to open the loading hatch.

[0023] In one embodiment, it includes a discharge port body forming a "mouth" structure. The discharge port body includes two end funnel plate assemblies arranged horizontally, a first side funnel plate assembly connecting the one-side edges between the two end funnel plate assemblies, and a second side funnel plate assembly connecting the other-side edges between the two end funnel plate assemblies;

[0024] Inner sealing structures are provided on the inner sides of the openings below the first side funnel plate assembly and the second side funnel plate assembly; outer sealing structures are provided in an embedded form on the outer sides of the openings below each end funnel plate assembly, the first side funnel plate assembly, and the second side funnel plate assembly, and the lowest position of the inner sealing structure is lower than the lowest position of the outer sealing structure.

[0025] In one embodiment, the end funnel plate assembly includes an end funnel plate, a transverse strengthening beam, a transverse pressing strip, and a transverse sealing strip;

[0026] Both sides of the end funnel plate are respectively connected to the first side funnel plate assembly and the second side funnel plate assembly. The transverse strengthening beam is horizontally arranged on the outer side of the opening below the end funnel plate; threaded holes for installing the transverse pressing strip are provided at the bottom of the transverse strengthening beam, a transverse groove is formed on the lower surface of the bottom of the transverse pressing strip, and the transverse sealing strip is installed in the transverse groove through the installation part; the transverse sealing strip is an outer sealing structure, and the transverse sealing strip is a rubber sealing strip with a cross-section in the shape of "Ω".

[0027] In one embodiment, the first side funnel plate assembly includes a first side funnel plate, a first pressing plate, a first longitudinal sealing plate, a first longitudinal sealing strip, a first pressing strip, a first longitudinal strengthening beam, a first sealing plate, and a first mounting plate;

[0028] The first mounting plate is fixed to the outside of the first side hopper plate through the mounting holes. The first pressing plate and the first longitudinal sealing plate are fixed to the inside of the first side hopper plate through the mounting holes. The first pressing plate is used to press the first longitudinal sealing plate. The mounting holes of the first side hopper plate, the first mounting plate, the first pressing plate and the first longitudinal sealing plate are all centered and aligned, and the four are locked by a bolt assembly.

[0029] The first longitudinal reinforcing beam is arranged in a trough structure on the outside of the first side hopper plate, and both ends of the first longitudinal reinforcing beam are sealed by two first sealing plates. Threaded holes for installing the first pressing strip are uniformly arranged at the bottom of the first longitudinal reinforcing beam. A first longitudinal groove is formed on the lower surface of the bottom of the first pressing strip. The first longitudinal sealing strip is installed in the first longitudinal groove through the installation part.

[0030] The first longitudinal sealing plate is an inner sealing structure, and the first longitudinal sealing plate is a rubber sealing plate with a broken line cross-section of 120°. The first longitudinal sealing strip is an outer sealing structure, and the first longitudinal sealing strip is a rubber sealing strip with a cross-section of "Ω" shape.

[0031] Specifically, the periphery of the "mouth" - shaped hopper is a frame - type outer sealing structure composed of transverse sealing strips and longitudinal sealing strip assemblies. The transverse sealing strip is embedded in the two longitudinal sealing strips. The longitudinal sealing plates arranged along the longitudinal direction of the hopper form an inner sealing structure. When the bottom door plate contacts the hopper opening, it first squeezes the sealing plate and then squeezes the sealing rubber strip. The gaps at the joints are eliminated due to the squeezing of the sealing strips at the four corners of the frame, achieving the sealing effect.

[0032] In one embodiment, the side wall includes a side wall panel, two end - side wall connecting plates connected to both ends of the inner wall of the side wall panel, multiple reinforcing beams longitudinally arranged on the inner wall of the side wall panel to increase the stiffness of the side wall panel, two first partition components arranged between the two end - side wall connecting plates, a second partition component arranged between the two first partition components, and several installation beam components; the ends of the reinforcing beams are connected to the first partition component, the second partition component or the end - side wall connecting plates; several installation beam components are arranged between the frames formed by the two side wall panels.

[0033] The end - side wall connecting plates are obliquely arranged at both ends of the side wall panel at a certain angle; there is also an upper side beam, which is attached to the upper edge of the side wall panel. The upper parts of the first partition component and the second partition component are both connected to the upper side beam; the cross - section of the side wall panel includes a middle straight segment, an upper straight segment and a lower straight segment. An upper arc segment for increasing the self - stiffness of the side wall panel is arranged between the middle straight segment and the upper straight segment, and a lower arc segment for increasing the self - stiffness of the side wall panel is arranged between the middle straight segment and the lower straight segment. The bottom of the lower straight segment is connected to the hopper assembly in a straight - segment form; an upper arc segment for increasing the self - stiffness of the side wall panel and with a radius greater than one meter is arranged between the middle straight segment and the upper straight segment; a lower arc segment for increasing the self - stiffness of the side wall panel and with a radius greater than four meters is arranged between the middle straight segment and the lower straight segment.

[0034] Specifically, several partition wall components, mounting beam components, and reinforcing beams are installed between the side walls. This improves the side walls' resistance to external expansion deformation while minimizing the thickness of the plate material in each component, achieving a lightweight vehicle design. Several reinforcing beams evenly distributed longitudinally along the side wall panels effectively address structural instability and deformation issues that may occur when the vehicle is subjected to longitudinal impacts. The use of upper side beams not only reduces the vehicle's weight but also reduces the interior volume occupied by the irregularly shaped upper side beams, increasing the overall vehicle volume. The side wall panels adopt a cross-sectional design combining arcs and straight lines. The upper, middle, and lower sections are straight, maximizing the use of vehicle clearance. The straight sections are connected by two arcs of different radii, increasing the side wall panel's rigidity and simultaneously increasing the vehicle's volume.

[0035] In one embodiment, the bottom door includes two symmetrically arranged bottom door assemblies, a bearing mounting seat assembly, a drive shaft assembly, a hydraulic cylinder, and a hydraulic cylinder mounting seat; the drive shaft assembly is located in the middle of the vehicle bottom, and the two bottom door assemblies are symmetrically arranged on both sides of the drive shaft assembly. The two bottom door assemblies are arranged longitudinally along the vehicle body and are movably connected to the drive shaft assembly.

[0036] The bearing mounting bracket assembly is fixed to the bottom of the vehicle body and is placed at both ends of the drive shaft assembly and connected to the drive shaft assembly by fasteners; the hydraulic cylinder mounting bracket is fixed on the middle beam assembly, one end of the hydraulic cylinder is connected to the hydraulic cylinder mounting bracket by a hinge, and the other end is connected to the drive shaft assembly by a hinge; the secondary locking device works with the drive shaft assembly to prevent the bottom door from being opened accidentally.

[0037] Specifically, a transmission mechanism with over-dead-point capability is employed, giving the bottom door a self-locking function to prevent accidental opening. A hydraulic control system drives the bottom door's opening and closing, eliminating the need for dedicated ground facilities, reducing manufacturing costs. The hydraulic control system also provides a secondary guarantee against accidental opening. A locking device is installed on the main shaft, working in conjunction with a manually operated secondary locking mechanism, providing triple protection against accidental opening of the bottom door.

[0038] In one embodiment, the secondary locking device includes a handle assembly, a first pull rod assembly, a lever fulcrum assembly, a second pull rod assembly, a rotating shaft assembly, a tension spring seat, a tension spring, a third pull rod assembly, and a locking lever assembly;

[0039] The handle assembly is fixed to both sides of the base frame, the lever fulcrum assembly is fixed to the bottom of the vehicle, the two ends of the first pull rod assembly are movably connected to the handle assembly and the lever fulcrum assembly respectively via pins, the second pull rod assembly is movably connected to the rotating shaft assembly via pins, the tension spring seat is fixed to the middle of the base frame, one end of the tension spring is fitted into the tension spring seat, and the other end is connected to the rotating shaft assembly, and the third pull rod assembly is movably connected to the rotating shaft assembly and the locking lever assembly respectively via pins.

[0040] Specifically, when the bottom door is opened, rotate the handle to a certain angle. The handle drives the first pull rod assembly and the second pull rod assembly to move, thereby driving the rotating shaft assembly to rotate, and then driving the third pull rod assembly to move, and finally driving the locking lever assembly to rotate away from the main shaft locking block. At this time, the secondary locking mechanism is unlocked. After the bottom door is successfully opened, return the handle to its original position to lock the secondary locking mechanism.

[0041] When the bottom door is closed, the secondary locking mechanism needs to be unlocked first, that is, rotate the handle to a certain angle. The handle drives the first pull rod assembly and the second pull rod assembly to move, thereby driving the rotating shaft assembly to rotate, and then driving the third pull rod assembly to move, and finally driving the locking lever assembly to rotate away from the main shaft locking block. At this time, the secondary locking mechanism is unlocked. After the bottom door is successfully closed, return the handle to its original position to lock the secondary locking mechanism.

[0042] The beneficial effects of the present invention are as follows:

[0043] 1. The present invention innovatively designs a railway hopper car for transporting fine-grained powdery goods. For the sealing of powdery goods, an "open" - shaped inner and outer double - layer sealing structure is innovatively adopted at the unloading port. When the door panel contacts the hopper opening, it first squeezes the inner - layer sealing structure and then the outer - layer sealing structure. At the four corners of the frame, the gaps at the joints are eliminated due to the extrusion of the outer - layer sealing structure, achieving the sealing effect. It can not only meet the sealing requirements for the transportation of bulk goods but also meet the sealing requirements for the transportation of fine - grained powdery goods.

[0044] 2. A through - length rectangular loading port is provided on the car roof. The opening and closing of the rectangular top cover are pneumatically controlled. A circular loading port is provided on the rectangular top cover, and an eccentric manual lock is provided on the circular top cover. The opening and closing of the circular top cover are manually controlled. These two forms of loading ports can meet the requirements of different loading equipment, and the loading method is flexible.

[0045] 3. To increase the vehicle volume and reduce the vehicle self - weight, side wall panels with a combined form of arc and straight line in the cross - section are innovatively adopted. The upper, middle, and lower parts are straight - line forms, making the most of the locomotive and vehicle clearance limit. Two arcs with different radii are used to connect and transition between the straight lines, increasing the stiffness of the side wall panels and at the same time increasing the vehicle volume. An L - shaped upper side beam is built - in, which can not only reduce the vehicle self - weight but also reduce the vehicle interior volume occupied by the special - shaped upper side beam, increasing the overall vehicle volume.

[0046] 4. The bottom door adopts a drive mechanism that passes the dead point, enabling the bottom door to have a self - locking function to prevent the bottom door from accidentally opening by itself. The opening and closing of the bottom door are driven by a hydraulic control system, eliminating the need for special ground facilities, reducing the manufacturing cost. The hydraulic control system can ensure a second - level prevention of the bottom door from accidentally opening. A locking device is provided on the transmission main shaft of the bottom door, cooperating with a manually operated secondary locking mechanism, providing triple protection to prevent the bottom door from accidentally opening. . Description of the Drawings

[0047] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a front view of a railway hopper car structure for transporting powdery goods provided by the present invention;

[0049] Figure 2 This is the main view of the vehicle body structure;

[0050] Figure 3 This is a front view of the top cover and transmission device.

[0051] Figure 4 This is a top view of the top cover and transmission mechanism.

[0052] Figure 5 This is a schematic diagram of the circular loading port cover locking device;

[0053] Figure 6 This is a top view of the funnel;

[0054] Figure 7 This is the AA view of the funnel;

[0055] Figure 8 This is a schematic diagram of the funnel structure;

[0056] Figure 9 This is a structural schematic diagram of the funnel plate assembly;

[0057] Figure 10 This is a structural schematic diagram of the first side funnel plate assembly;

[0058] Figure 11 This is a left view of the hidden cover plate of the first side funnel plate assembly;

[0059] Figure 12 This is a structural schematic diagram of the sidewall assembly;

[0060] Figure 13 This is a structural schematic diagram of the side wall panel;

[0061] Figure 14 This is a structural schematic diagram of the bottom door assembly;

[0062] Figure 15 This is a schematic diagram of the bottom door when it is closed;

[0063] Figure 16 This is a schematic diagram of the bottom door opening structure;

[0064] Figure 17 This is a schematic diagram of the two-stage locking device;

[0065] Figure 18 This is a schematic diagram of the enlarged A-axis structure of the two-stage locking device;

[0066] Figure 19 This is a schematic diagram of the structure of a double-eared arc-shaped hollow sealing strip;

[0067] Reference numerals: 1-Car body, 2-Pneumatic control system, 3-Coupled buffer device, 4-Air brake device, 5-Manual brake device, 6-Bogie, 7-Hydraulic control system, 8-Tilt-type bottom door, 9-Secondary locking device;

[0068] 11-Base frame, 12-Function funnel, 13-Side wall, 14-End wall, 15-Roof;

[0069] 121 - End funnel plate assembly, 122 - First side funnel plate assembly, 123 - Second side funnel plate assembly;

[0070] 1211-End funnel plate, 121-Transverse reinforcing beam, 1213-Transverse pressure strip, 1214-Transverse sealing strip (1214).

[0071] 1221-First side funnel plate, 1222-First pressure plate, 1223-First longitudinal sealing plate, 1224-First longitudinal sealing strip, 1225-First pressure strip, 1226-First longitudinal reinforcing beam, 1227-First sealing plate, 1228-First mounting plate;

[0072] 131-Side wall panel, 132-End side wall connecting plate, 133-Upper side beam, 134-Reinforcing beam, 135-First partition wall, 136-Second partition wall assembly, 137-Mounting beam assembly;

[0073] 151-Rectangular top cover, 152-Locking device, 153-Circular loading port cover, 154-Walkway, 155-Drive shaft device;

[0074] 1521-Rotating support, 1522-Rotating shaft, 1523-Handle;

[0075] 81-Bottom door assembly, 82-Bearing mounting bracket assembly, 83-Drive shaft assembly, 84-Hydraulic cylinder, 85-Hydraulic cylinder mounting bracket;

[0076] 91-Handle assembly, 92-First pull rod assembly, 93-Lever fulcrum assembly, 94-Second pull rod assembly, 95-Rotating shaft assembly, 96-Tension spring seat, 97-Tension spring, 98-Third pull rod assembly, 99-Locking lever assembly. Detailed Implementation

[0077] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0078] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0079] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0080] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention 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, or be constructed and operated in a specific orientation.

[0081] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances, and therefore they should not be construed as limitations on this invention.

[0082] like Figures 1 to 19As shown, this embodiment provides a railway hopper car for transporting powdery goods, including a car body 1, a pneumatic control system 2, a coupler buffer device 3, an air brake device 4, a manual brake device 5, and a bogie 6. A hydraulic control system 7 is provided at the lower part of the car body. The car body 1 includes a chassis 11. Two hoppers 12 with double sealing structures are provided at the bottom of the chassis 11. The two hoppers 12 are distributed on both sides of the middle beam of the chassis 11. Two side walls 13 are provided on both sides of the chassis 11. End walls 14 are provided at both ends of the two side walls 13. A car roof 15 is provided on the upper part of the side walls 13 and the end walls 14. A loading port is provided at the bottom of the hoppers 12. A flip-type bottom door 8 with a two-stage locking device 9 is provided at the loading port. The car roof 15 includes a fixed top cover assembly and a movable top cover assembly provided on the fixed top cover assembly.

[0083] Specifically, the base frame is a bottom support frame, the side walls and end walls enclose the surroundings, the funnel encloses the bottom and unloading is achieved through opening and closing, and the rectangular top cover and the circular loading port cover cover the top and loading is achieved through opening and closing.

[0084] In one embodiment, the fixed top cover assembly has a full-length rectangular loading port, and the perimeter of the full-length rectangular loading port is provided with double-eared arc-shaped hollow sealing strips for waterproofing and other sealing purposes. The movable top cover assembly includes a rectangular top cover 151 that is pneumatically controlled and can move horizontally at the rectangular loading port. The rectangular top cover 151 has multiple circular loading ports attached. Figure 4 The vehicle has five circular loading ports, each equipped with a circular loading port cover 153 with a manual locking device 152. The rectangular top cover 151 and the circular loading port cover 153 cover the top and allow loading to be carried out by opening and closing. The circular loading ports are used to accommodate loading equipment for powdery goods, while the long rectangular loading ports are used to accommodate loading equipment for granular bulk goods. A long walkway 154 is provided on one side of the vehicle roof to facilitate operators to walk on the roof and operate the circular loading port cover 153.

[0085] In one embodiment, the double-eared arc-shaped hollow sealing strip includes an arc-shaped portion, a snap-fit ​​portion connected to the bottom of the arc-shaped portion, and a non-circular auxiliary sealing element disposed on the top of the arc-shaped portion and in contact with the rectangular top cover 151, which has a rainproof function. The snap-fit ​​portion is connected to the pressure strip by a sealing embedding method, and the pressure strip is installed on the top of the mounting base. The arc-shaped portion has a hollow part inside, the bottom of the arc-shaped portion is a bottom plane, and the top of the arc-shaped portion is a top convex arc-shaped surface. The non-circular auxiliary sealing element is located on the top convex arc-shaped surface, and the snap-fit ​​portion is connected to the bottom plane through a connecting portion.

[0086] Specifically, the curved section has a hollow section inside, which improves the compression deformation capacity between the sealing strip and the top plate, as well as the recovery capacity of the sealing strip.

[0087] The pressure strip is long and narrow, with a two-tiered stepped groove (smaller at the top and larger at the bottom) cut along its length on its upper surface. The engaging part is shaped to fit the bottom groove of the two-tiered stepped groove. The bottom groove of the two-tiered stepped groove has several serrated first anti-slip teeth inside, and the outer surface of the engaging part has several serrated second anti-slip teeth. The first and second anti-slip teeth mesh with each other.

[0088] Specifically, a serrated mounting base is used to increase friction with the mounting surface, improving the anti-slip performance of the sealing strip. An embedded installation method is employed, allowing for easy removal and installation by pulling along the length of the sealing strip, reducing labor intensity.

[0089] The hollow sealing strip also includes a side rainproof skirt that is vulcanized integrally with the arc-shaped portion, and the side rainproof skirt is connected to one side of the bottom of the arc-shaped portion. The irregular auxiliary sealing element includes a left upper rainproof edge and a right upper rainproof edge. The connection points between the left upper rainproof edge and the right upper rainproof edge and the top of the arc-shaped portion are arc-shaped strips. The free ends of both arc-shaped strips are provided with bends in the same direction, and the bends are in sealing contact with the top plate. The side rainproof skirt includes an inclined plate connected to the arc-shaped portion and a vertical plate connected to the inclined plate. The bottom of the vertical plate is lower than the top of the mounting base.

[0090] Specifically, the snap-fit ​​part is installed inside the pressure strip, and the top plate squeezes the hollow sealing strip, compressing the upper left rainproof edge, the arc-shaped part, and the upper right rainproof edge by a certain amount to achieve a sealing effect.

[0091] In one embodiment, a drive shaft device 155 is built into both sides of the roof 15. Each drive shaft device 155 includes a cylinder hinged between the roof 15 and the end wall 14. Each cylinder is connected to the pneumatic control system 2 through an air circuit. The pneumatic control system 2 controls the two cylinders to extend or retract synchronously, thereby opening or closing the rectangular top cover 151 to realize the loading operation of granular bulk goods.

[0092] In one embodiment, the manually operated locking device 152 includes a rotating support 1521, a rotating shaft 1522, and a handle 1523; the rotating support 1521 is disposed on a rectangular top cover 151 near the circular loading port cover 153, the rotating shaft 1522 is rotatably disposed on the rotating support 1521, and the rotating shaft 1522 is welded and fixed to the handle 1523.

[0093] The rotating shaft 1522 adopts an eccentric design. The rotating shaft 1522 is provided with a working part for pressing the circular loading port cover 153 and a clearance part for avoiding the circular loading port cover 153.

[0094] The rotating shaft 1522 includes a U-shaped part in the middle and rotating rods set on the outer sides of the two side walls of the U-shaped part. The outer bottom surface of the U-shaped part is the working part, and the inner groove of the U-shaped part is the clearance part.

[0095] One side of the circular loading hatch cover 153 is provided with a Z-shaped pressing plate that cooperates with the U-shaped part. One side of the Z-shaped pressing plate is fixed to the loading hatch cover, and the other side extends below the U-shaped part. When the loading hatch cover is closed, the working part presses the Z-shaped pressing plate. When the loading hatch cover is opened, the U-shaped part is rotated, and the avoiding part is located at the Z-shaped pressing plate;

[0096] The distance from the axis of the rotating rod to the inner bottom surface of the U-shaped part is L1. The position of the projection of the axis of the rotating rod on the Z-shaped pressing plate is the projection line. The distance from the end of the Z-shaped pressing plate to the projection line is L2, and the distance L1 is greater than the distance L2; the distance from the axis of the rotating rod to the outer bottom surface of the U-shaped part is greater than or equal to the distance from the axis of the rotating rod to the Z-shaped pressing plate;

[0097] The inner bottom surface of the U-shaped part is a planar release surface, and the outer bottom surface of the U-shaped part is an arc-shaped locking surface. The locking surface is in a tangential fit state with the Z-shaped pressing plate.

[0098] Specifically, the rotating shaft adopts an eccentric design, and there is a certain spatial distance between the rotation axis and the locking surface, that is, the outer bottom surface of the U-shaped part. The locking surface is arc-shaped, which can effectively reduce friction; the release surface, the inner bottom surface of the U-shaped part, is a planar structure. When it rotates to the vertical position, it can avoid blocking the end of the Z-shaped pressing plate.

[0099] The ends of the two straight arms of the handle are fixed to the corresponding ends of the rotating rod by welding. The release surface is perpendicular to the whole handle. The rotating shaft is welded and fixed to the handle. The release surface of the rotating shaft is perpendicular to the handle, forming a 90-degree angle. The rotating shaft rotates along with the handle around the fulcrum of the support seat to realize the locking and opening of the roof loading hatch cover.

[0100] Working principle: When locking the loading hatch cover, place the handle in the vertical position and make the release surface perpendicular to the loading hatch cover. Close the loading hatch cover and rotate the handle outward. The locking surface, that is, the outer bottom surface of the U-shaped part, is in a tangential fit state with the Z-shaped pressing plate and is gradually locked as the rotation angle of the handle increases. When the U-shaped part is in the horizontal position and the lowest point of the locking surface contacts the Z-shaped pressing plate, it is the locking dead point position. At this time, continue to press and rotate the handle, and the loading hatch cover will not accidentally open when locked. When opening the loading hatch cover, rotate the handle upward, the locking surface rotates away from the pressing plate, and at the same time the release surface avoids the Z-shaped pressing plate to realize the opening of the loading hatch cover.

[0101] In one embodiment, it includes a discharge port main body forming a "mouth" structure. The discharge port main body includes two end funnel plate assemblies 121 arranged horizontally, a first side funnel plate assembly 122 connecting the edges of one side of the two end funnel plate assemblies 121, and a second side funnel plate assembly 123 connecting the edges of the other side of the two end funnel plate assemblies 121;

[0102] An inner sealing structure is provided on the inner side of the lower opening of the first funnel plate assembly 122 and the second funnel plate assembly 123; an outer sealing structure is provided on the outer side of the lower opening of each end funnel plate assembly 121, the first funnel plate assembly 122 and the second funnel plate assembly 123 in an inlay manner, and the lowest position of the inner sealing structure is lower than the lowest position of the outer sealing structure.

[0103] In one embodiment, the end funnel plate assembly 121 includes an end funnel plate 1211, a transverse reinforcing beam 1212, a transverse pressure strip 1213, and a transverse sealing strip 1214.

[0104] The end funnel plate 1211 is connected to the first side funnel plate assembly 122 and the second side funnel plate assembly 123 on both sides respectively. The transverse reinforcing beam 1212 is transversely arranged on the outside of the opening below the end funnel plate 1211. The bottom of the transverse reinforcing beam 1212 is provided with a threaded hole for installing the transverse pressure strip 1213. The lower surface of the bottom of the transverse pressure strip 1213 is provided with a transverse groove. The transverse sealing strip 1214 is installed in the transverse groove through the mounting part. The transverse sealing strip 1214 is an outer sealing structure. The transverse sealing strip 1214 is a rubber sealing strip with an "Ω" shaped cross section.

[0105] In one embodiment, the first side funnel plate assembly 122 includes a first side funnel plate 1221, a first pressure plate 1222, a first longitudinal sealing plate 1223, a first longitudinal sealing strip 1224, a first pressure strip 1225, a first longitudinal reinforcing beam 1226, a first sealing plate 1227, and a first mounting plate 1228.

[0106] The first mounting plate 1228 is fixed to the outside of the first side funnel plate 1221 through mounting holes. The first pressure plate 1222 and the first longitudinal sealing plate 1223 are fixed to the inside of the first side funnel plate 1221 through mounting holes. The first pressure plate 1222 is used to press the first longitudinal sealing plate 1223. The mounting holes of the first side funnel plate 1221, the first mounting plate 1228, the first pressure plate 1222 and the first longitudinal sealing plate 1223 are all centered and locked together by bolt assembly.

[0107] The first longitudinal reinforcing beam 1226 is a groove-shaped structure located on the outside of the first side funnel plate 1221. Both ends of the first longitudinal reinforcing beam 1226 are sealed by two first sealing plates 1227. The bottom of the first longitudinal reinforcing beam 1226 is evenly provided with threaded holes for installing the first pressure strip 1225. The bottom lower surface of the first pressure strip 1225 is provided with a first longitudinal groove. The first longitudinal sealing strip 1224 is installed in the first longitudinal groove through the mounting part.

[0108] The first longitudinal sealing plate 1223 is an inner sealing structure. The first longitudinal sealing plate 1223 is a rubber sealing plate with a broken line shape having a cross-section of 120°. The first longitudinal sealing strip 1224 is an outer sealing structure. The first longitudinal sealing strip 1224 is a rubber sealing strip with a cross-section in the shape of "Ω".

[0109] Specifically, the periphery of the "mouth"-shaped funnel has a frame-type outer sealing structure composed of transverse sealing strips and longitudinal sealing strip assemblies. The transverse sealing strip is embedded within the two longitudinal sealing strips. The longitudinal sealing plates arranged along the longitudinal direction of the funnel form an inner sealing structure. When the bottom door plate contacts the funnel opening, it first squeezes the sealing plate and then squeezes the sealing rubber strip. The gaps at the connections are eliminated due to the squeezing of the sealing strips at the four corners of the frame, achieving a sealing effect.

[0110] In one embodiment, the side wall 13 includes a side wall plate 131, two end side wall connecting plates 132 connected to both ends of the inner wall of the side wall plate 131, multiple reinforcing beams 134 longitudinally arranged on the inner wall of the side wall plate 131 to increase the stiffness of the side wall plate 131, two first partition wall assemblies 135 arranged between the two end side wall connecting plates 132, a second partition wall assembly 136 arranged between the two first partition wall assemblies 135, and several installation beam assemblies 137; the ends of the reinforcing beams 134 are connected to the first partition wall assembly 135, the second partition wall assembly 136, or the end side wall connecting plate 132; several installation beam assemblies 137 are arranged within the frame formed by the two side wall plates 131;

[0111] The end side wall connecting plates 132 are obliquely arranged at a certain angle at both ends of the side wall plate 131; it further includes an upper side beam 133, the upper side beam 133 is fitted to the upper edge of the side wall plate 131, and the upper parts of both the first partition wall assembly 135 and the second partition wall assembly 136 are connected to the upper side beam 133; the cross-section of the side wall plate 131 includes a middle straight segment, an upper straight segment, and a lower straight segment. An upper arc segment for increasing the self-stiffness of the side wall plate 131 is provided between the middle straight segment and the upper straight segment, and a lower arc segment for increasing the self-stiffness of the side wall plate 131 is provided between the middle straight segment and the lower straight segment. The bottom of the lower straight segment is connected to the funnel assembly in a straight segment form; an upper arc segment for increasing the self-stiffness of the side wall plate 131 and having a radius greater than one meter is provided between the middle straight segment and the upper straight segment; a lower arc segment for increasing the self-stiffness of the side wall plate 131 and having a radius greater than four meters is provided between the middle straight segment and the lower straight segment.

[0112] Specifically, several partition wall components, mounting beam components, and reinforcing beams are installed between the side walls. This improves the side walls' resistance to external expansion deformation while minimizing the thickness of the plate material in each component, achieving a lightweight vehicle design. Several reinforcing beams evenly distributed longitudinally along the side wall panels effectively address structural instability and deformation issues that may occur when the vehicle is subjected to longitudinal impacts. The use of upper side beams not only reduces the vehicle's weight but also reduces the interior volume occupied by the irregularly shaped upper side beams, increasing the overall vehicle volume. The side wall panels adopt a cross-sectional design combining arcs and straight lines. The upper, middle, and lower sections are straight, maximizing the use of vehicle clearance. The straight sections are connected by two arcs of different radii, increasing the side wall panel's rigidity and simultaneously increasing the vehicle's volume.

[0113] In one embodiment, the bottom door 8 includes two symmetrically arranged bottom door assemblies 81, a bearing mounting seat assembly 82, a drive shaft assembly 83, a hydraulic cylinder 84, and a hydraulic cylinder mounting seat 85; the drive shaft assembly 83 is located in the middle of the vehicle bottom, and the two bottom door assemblies 81 are symmetrically arranged on both sides of the drive shaft assembly 83. The two bottom door assemblies 81 are arranged longitudinally along the vehicle body and are movably connected to the drive shaft assembly 83.

[0114] The bearing mounting bracket assembly 82 is fixed to the bottom of the vehicle body and is placed at both ends of the drive shaft assembly 83 and connected to the drive shaft assembly 83 by fasteners; the hydraulic cylinder mounting bracket 85 is fixed on the middle beam assembly, one end of the hydraulic cylinder 84 is connected to the hydraulic cylinder mounting bracket 85 by a hinge, and the other end is connected to the drive shaft assembly 83 by a hinge; the secondary locking device 9 cooperates with the drive shaft assembly 83 to prevent the bottom door from being opened accidentally.

[0115] Specifically, a transmission mechanism with over-dead-point capability is employed, giving the bottom door a self-locking function to prevent accidental opening. A hydraulic control system drives the bottom door's opening and closing, eliminating the need for dedicated ground facilities, reducing manufacturing costs. The hydraulic control system also provides a secondary guarantee against accidental opening. A locking device is installed on the main shaft, working in conjunction with a manually operated secondary locking mechanism, providing triple protection against accidental opening of the bottom door.

[0116] In one embodiment, the secondary locking device 9 includes a handle assembly 91, a first pull rod assembly 92, a lever fulcrum assembly 93, a second pull rod assembly 94, a rotating shaft assembly 95, a tension spring seat 96, a tension spring 97, a third pull rod assembly 98, and a locking lever assembly 99.

[0117] The handle assembly 91 is fixed to both sides of the base frame, the lever fulcrum assembly 93 is fixed to the bottom of the vehicle, the two ends of the first pull rod assembly 92 are movably connected to the handle assembly 91 and the lever fulcrum assembly 93 respectively via pins, the second pull rod assembly 94 is movably connected to the rotating shaft assembly 95 via pins, the tension spring seat 96 is fixed to the middle of the base frame, one end of the tension spring 97 is fitted into the tension spring seat 96, and the other end is connected to the rotating shaft assembly 95, and the third pull rod assembly 98 is movably connected to the rotating shaft assembly 95 and the locking lever assembly 99 respectively via pins.

[0118] Specifically, when the bottom door is opened, rotating the handle to a certain angle causes the first and second pull rod assemblies to move, which in turn causes the rotating shaft assembly to rotate, which in turn causes the third pull rod assembly to move, and finally causes the locking lever assembly to rotate and disengage from the main shaft locking block. At this time, the secondary locking mechanism is unlocked, and after the bottom door is successfully opened, the handle is returned to its original position to lock the secondary locking mechanism.

[0119] When the bottom door is closed, the secondary locking mechanism must first be unlocked. This is done by rotating the handle to a certain angle. The handle moves the first and second pull rod assemblies, which in turn rotates the rotating shaft assembly, causing the third pull rod assembly to move. Finally, the locking lever assembly rotates and disengages from the main shaft locking block. At this point, the secondary locking mechanism is unlocked, and the bottom door closes smoothly. Then, the handle is returned to its original position to lock the secondary locking mechanism.

Claims

1. A railway hopper car for transporting powdery goods, comprising a car body (1), a pneumatic control system (2), a coupler buffer device (3), an air brake device (4), a manual brake device (5), and a bogie (6), wherein a hydraulic control system (7) is provided under the car body, characterized in that, The vehicle body (1) includes a chassis (11). Two funnels (12) with a double-sealing structure are provided at the bottom of the chassis (11). The two funnels (12) are distributed on both sides of the center beam of the chassis (11). Two side walls (13) are provided on both sides of the chassis (11). End walls (14) are provided at both ends of the two side walls (13). A roof (15) is provided above the side walls (13) and the end walls (14). A discharge opening is provided at the bottom of the funnels (12), and a flip bottom door (8) with a secondary locking device (9) is provided at the discharge opening. The roof (15) includes a fixed roof assembly and a movable roof assembly provided on the fixed roof assembly; A through-length rectangular loading opening is provided on the fixed roof assembly. Double-ear arc-shaped hollow sealing rubber strips are provided around the through-length rectangular loading opening. The movable roof assembly includes a rectangular roof cover (151) that is provided at the rectangular loading opening and can be translated pneumatically. A plurality of circular loading openings are provided on the rectangular roof cover (151), and a circular loading opening cover (153) with a manual locking device (152) is provided at each circular loading opening. A through-length walkway (154) is provided on one side of the roof (15); It includes a discharge opening main body forming a "mouth" structure. The discharge opening main body includes two end funnel plate assemblies (121) arranged horizontally, a first side funnel plate assembly (122) connecting the side edges of one side of the two end funnel plate assemblies (121), and a second side funnel plate assembly (123) connecting the side edges of the other side of the two end funnel plate assemblies (121); Inner layer sealing structures are provided on the inner sides of the openings below the first side funnel plate assembly (122) and the second side funnel plate assembly (123). Outer layer sealing structures are provided on the outer sides of the openings below each of the end funnel plate assemblies (121), the first side funnel plate assembly (122), and the second side funnel plate assembly (123) in an embedded form. The lowest position of the inner layer sealing structure is lower than the lowest position of the outer layer sealing structure.

2. A railway hopper car for transporting powdery goods according to claim 1, characterized in that, Drive shaft devices (155) are built into both sides of the roof (15). Each drive shaft device (155) includes a cylinder hinged between the roof (15) and the end wall (14). Each cylinder is connected to the pneumatic control system (2) through an air circuit. The pneumatic control system (2) controls the two cylinders to extend or contract synchronously, driving the rectangular roof cover (151) to open or close.

3. A railway hopper car for transporting powdered goods according to claim 1, characterized in that, The manual locking device (152) includes a rotating support (1521), a rotating shaft (1522), and a handle (1523); the rotating support (1521) is provided on the rectangular roof cover (151) near the circular loading opening cover (153), the rotating shaft (1522) is rotatably provided on the rotating support (1521), and the rotating shaft (1522) is fixedly welded to the handle (1523); The rotating shaft (1522) adopts an eccentric design. The rotating shaft (1522) is provided with a working part for pressing the circular loading port cover (153) and a clearance part for avoiding the circular loading port cover (153). The rotating shaft (1522) includes a U-shaped part in the middle and rotating rods arranged on the outer sides of the two side walls of the U-shaped part. The outer bottom surface of the U-shaped part is the working part, and the inner groove of the U-shaped part is the clearance part. A Z-shaped pressure plate that mates with a U-shaped part is provided on one side of the circular loading port cover (153). One side of the Z-shaped pressure plate is fixed on the loading port cover, and the other side extends to the bottom of the U-shaped part. When the loading port cover is closed, the working part presses the Z-shaped pressure plate. When the loading port cover is opened, the U-shaped part is rotated and the clearance part is located on the Z-shaped pressure plate. The distance from the axis of the rotating rod to the inner bottom of the U-shaped part is L1. The orthographic projection of the axis of the rotating rod onto the Z-shaped pressure plate is the projection line. The distance from the end of the Z-shaped pressure plate to the projection line is L2. The distance L1 is greater than the distance L2. The distance from the axis of the rotating rod to the outer bottom of the U-shaped part is greater than or equal to the distance from the axis of the rotating rod to the Z-shaped pressure plate. The inner bottom surface of the U-shaped part is a flat release surface, and the outer bottom surface of the U-shaped part is an arc-shaped locking surface. The locking surface is tangentially engaged with the Z-shaped pressure plate.

4. A railway hopper car for transporting powdery goods according to claim 1, characterized in that, The end funnel plate assembly (121) includes an end funnel plate (1211), a transverse reinforcing beam (1212), a transverse pressure strip (1213), and a transverse sealing strip (1214). The end funnel plate (1211) is connected to the first side funnel plate assembly (122) and the second side funnel plate assembly (123) on both sides respectively. The transverse reinforcing beam (1212) is transversely arranged outside the opening below the end funnel plate (1211). The bottom of the transverse reinforcing beam (1212) is provided with a threaded hole for installing the transverse pressure strip (1213). The lower surface of the bottom of the transverse pressure strip (1213) is provided with a transverse groove. The transverse sealing strip (1214) is installed in the transverse groove through the mounting part. The transverse sealing strip (1214) is an outer sealing structure. The transverse sealing strip (1214) is a rubber sealing strip with an "Ω" shaped cross section.

5. A railway hopper car for transporting powdered goods according to claim 1, characterized in that, The first side funnel plate assembly (122) includes a first side funnel plate (1221), a first pressure plate (1222), a first longitudinal sealing plate (1223), a first longitudinal sealing strip (1224), a first pressure strip (1225), a first longitudinal reinforcing beam (1226), a first sealing plate (1227), and a first mounting plate (1228). The first mounting plate (1228) is fixed to the outside of the first side funnel plate (1221) through mounting holes. The first pressure plate (1222) and the first longitudinal sealing plate (1223) are fixed to the inside of the first side funnel plate (1221) through mounting holes. The first pressure plate (1222) is used to press the first longitudinal sealing plate (1223). The mounting holes of the first side funnel plate (1221), the first mounting plate (1228), the first pressure plate (1222) and the first longitudinal sealing plate (1223) are all centered and locked together by bolt assembly. The first longitudinal reinforcing beam (1226) is arranged in a groove-shaped structure on the outside of the first side funnel plate (1221). The two ends of the first longitudinal reinforcing beam (1226) are sealed by two first sealing plates (1227). The bottom of the first longitudinal reinforcing beam (1226) is uniformly provided with threaded holes for installing the first pressure strip (1225). The bottom lower surface of the first pressure strip (1225) is provided with a first longitudinal groove. The first longitudinal sealing strip (1224) is installed in the first longitudinal groove through the mounting part. The first longitudinal sealing plate (1223) is an inner sealing structure, and the first longitudinal sealing plate (1223) is a zigzag rubber sealing plate with a cross section of 120°; the first longitudinal sealing strip (1224) is an outer sealing structure, and the first longitudinal sealing strip (1224) is a rubber sealing strip with a cross section of "Ω".

6. A railway hopper car for transporting powdery goods according to claim 1, characterized in that, The side wall (13) includes a side wall panel (131), two end side wall connecting plates (132) connected to both ends of the inner wall of the side wall panel (131), a plurality of reinforcing beams (134) arranged longitudinally on the inner wall of the side wall panel (131) to increase the stiffness of the side wall panel (131), two first partition wall assemblies (135) arranged between the two end side wall connecting plates (132), a second partition wall assembly (136) arranged between the two first partition wall assemblies (135), and a plurality of mounting beam assemblies (137); the ends of the reinforcing beams (134) are connected to the first partition wall assembly (135), the second partition wall assembly (136), or the end side wall connecting plates (132); the plurality of mounting beam assemblies (137) are arranged between the frames formed by the two side wall panels (131); The end wall connecting plate (132) is obliquely arranged at a certain angle at both ends of the side wall plate (131); it also includes an upper side beam (133), which is attached to the upper edge of the side wall plate (131), and the upper parts of the first partition wall assembly (135) and the second partition wall assembly (136) are both connected to the upper side beam (133); the cross-section of the side wall plate (131) includes a middle straight segment, an upper straight segment and a lower straight segment, and a space for increasing the side wall plate (131) is provided between the middle straight segment and the upper straight segment. The upper arc segment with self-stiffness is provided between the middle straight segment and the lower straight segment to increase the self-stiffness of the side wall panel (131). The bottom of the lower straight segment is connected to the funnel assembly in the form of a straight segment. An upper arc segment with a radius greater than one meter is provided between the middle straight segment and the upper straight segment to increase the self-stiffness of the side wall panel (131). A lower arc segment with a radius greater than four meters is provided between the middle straight segment and the lower straight segment to increase the self-stiffness of the side wall panel (131).

7. A railway hopper car for transporting powdered goods according to claim 1, characterized in that, The bottom door (8) includes two symmetrically arranged bottom door assemblies (81), a bearing mounting seat assembly (82), a drive shaft assembly (83), a hydraulic cylinder (84), and a hydraulic cylinder mounting seat (85); the drive shaft assembly (83) is located in the middle of the vehicle bottom, and the two bottom door assemblies (81) are symmetrically arranged on both sides of the drive shaft assembly (83). The two bottom door assemblies (81) are arranged longitudinally along the vehicle body and are movably connected to the drive shaft assembly (83); The bearing mounting bracket assembly (82) is fixed to the bottom of the vehicle body. The bearing mounting bracket assembly (82) is placed at both ends of the drive shaft assembly (83) and connected to the drive shaft assembly (83) by fasteners. The hydraulic cylinder mounting bracket (85) is fixed on the middle beam assembly. One end of the hydraulic cylinder (84) is connected to the hydraulic cylinder mounting bracket (85) by a hinge, and the other end is connected to the drive shaft assembly (83) by a hinge. The secondary locking device (9) cooperates with the drive shaft assembly (83) to prevent the bottom door from being opened accidentally.

8. A railway hopper car for transporting powdered goods according to claim 7, characterized in that, The secondary locking device (9) includes a handle assembly (91), a first pull rod assembly (92), a lever fulcrum assembly (93), a second pull rod assembly (94), a rotating shaft assembly (95), a tension spring seat (96), a tension spring (97), a third pull rod assembly (98), and a locking lever assembly (99). The handle assembly (91) is fixed to both sides of the base frame, the lever fulcrum assembly (93) is fixed to the bottom of the vehicle, the two ends of the first pull rod assembly (92) are movably connected to the handle assembly (91) and the lever fulcrum assembly (93) respectively by pins, the second pull rod assembly (94) is movably connected to the rotating shaft assembly (95) by pins, the tension spring seat (96) is fixed to the middle of the base frame, one end of the tension spring (97) is fitted into the tension spring seat (96), and the other end is connected to the rotating shaft assembly (95), the third pull rod assembly (98) is movably connected to the rotating shaft assembly (95) and the locking lever assembly (99) respectively by pins.

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