Hopper car ballast scraping device and hopper car

Abstract

The present invention discloses a ballast scraping device for a hopper car and a hopper car. The ballast scraping device for a hopper car comprises: a ballast scraping plate in an inverted isosceles trapezoidal structure; a loose ballast beam arranged at the upper end of the ballast scraping plate; the loose ballast beam comprises a slope; both ends of the slope are provided with blocking parts staggered with the slope, which can divert ballast particles to both sides of the slope; two hanging bases are respectively provided at the two ends of the bottom of the hopper car; the two hanging bases are respectively connected to the two ends of the ballast scraping plate through elastic mechanisms. The ballast is unloaded from the middle door and gathered in the direction of vehicle movement under the action of the scraper plate. The ballast is squeezed out from both sides or the slope of the scraper plate to achieve the effect of leveling the ballast layer. If the ballast gathers to the point where it can cross the inclined surface of the loose ballast beam, the inclined surface and the blocking part will stagger to guide the ballast to divert to both sides to avoid blockage and flipping the ballast at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of ballast hopper cars, and more particularly, relates to a ballast scraping device for a hopper car and the hopper car. Background Art

[0002] Railway ballast hopper cars are primarily used to transport ballast from mines, quarries, and other locations to railway construction and maintenance sites. They also control the opening and closing of the hopper bottom doors on both sides and in the middle of the vehicle to replenish the ballast needed for the railway track bed while the vehicle is moving. During the ballast replenishment process, the middle bottom door unloads the ballast directly into the middle of the track and cannot promptly control the amount of ballast unloaded or level the accumulated ballast. This poses a risk of hindering vehicle movement and even lifting the vehicle high enough to cause the wheels to derail. To avoid this risk, the middle doors of the ballast hopper cars currently in use have been welded and are no longer in use. Ballast can only be shoveled from both sides of the track to the middle by manpower, which is time-consuming and labor-intensive.

[0003] Currently, there are some domestic applications of installing scraping and ballast leveling devices. However, these devices cannot select or adjust the working surface height according to track conditions. There are also no safeguards to ensure that the working surface remains unchanged when the vehicle's empty or loaded load changes. These devices only employ simple adjustment methods or safeguards, making them unable to meet the needs of complex working environments. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and solve the problem that the existing scraping and ballast leveling devices cannot select or adjust the working surface height according to the track conditions.

[0005] In order to achieve the above object, the present invention provides a hopper car ballast scraping device, comprising:

[0006] The loose ballast beam has a slope in the middle of its upper end, and blocking parts staggered with the slope are provided at both ends of the slope, which can divert ballast to both sides of the slope;

[0007] The scraper plate is arranged at the lower end of the loose ballast beam and has an inverted isosceles trapezoidal structure;

[0008] Two hanging bases are respectively arranged at the two ends of the bottom of the hopper car, and the two hanging bases are respectively connected to the two ends of the scraper plate through elastic mechanisms;

[0009] Two limiting guide mechanisms are respectively arranged at the two ends of the scraping plate. One end of the two limiting guide mechanisms away from the scraping plate is slidably connected to the rail, so that the gap between the scraping plate and the rail is constant.

[0010] Optionally, an adjustment mechanism is further provided between the hanging base and the scraping plate, for making the gap between the hanging base and the scraping plate constant.

[0011] Optionally, the adjustment mechanism includes:

[0012] The first through hole is provided in the hanging base in an L-shape, wherein the vertical portion is connected to the hopper car, the horizontal portion is provided at an end of the vertical portion away from the hopper car, and the first through hole is provided in the horizontal portion;

[0013] a second through hole, provided on the loose ballast beam and located directly below the first through hole;

[0014] A bolt has one end which passes through the first through hole and the second through hole in sequence and is exposed, and a nut is provided at the exposed end of the bolt.

[0015] Optionally, a guide rod is vertically provided at the upper end of the loose ballast beam, and the upper end of the guide rod passes through the hanging base and is exposed.

[0016] Optionally, the elastic mechanism includes a tension spring.

[0017] Optionally, the limiting guide mechanism includes:

[0018] A first connecting plate is detachably connected to both ends of the scraping plate;

[0019] a first horizontal rod, one end of which is connected to the first connecting plate to form an angle, and the other end of which is provided with a first roller in rolling connection with the upper surface of the rail;

[0020] A second horizontal rod is arranged below the first horizontal rod in parallel through the gap between the vertical rods;

[0021] The second roller is horizontally arranged at the lower end of the second horizontal rod and is rotatably connected to the second horizontal rod. The upper side surface of the second roller is slidably connected to the inner top surface of the rail.

[0022] Optionally, the outer periphery of the second roller is exposed from the second horizontal rod, and a plurality of groups of parallel mounting holes are symmetrically provided on both sides of the scraping plate.

[0023] Optionally, the limiting guide mechanism includes:

[0024] A second connecting plate is detachably connected to both ends of the scraping plate;

[0025] a first connecting rod, one end of which is connected to the second connecting plate to form an angle, and the other end of which is provided with a third roller in rolling connection with the upper surface of the rail;

[0026] The third connecting rod is obliquely arranged at the lower end of the second connecting rod, and an end away from the second connecting rod is provided with a fourth roller that is slidably connected to the inner top surface of the rail. The fourth roller is spindle-shaped, and the outer periphery is in contact with the inner side surface and inner top surface of the rail.

[0027] Optionally, the first connecting rod includes:

[0028] A fixing portion, one end of which is connected to the second wheel connecting plate and the other end of which is provided with a U-shaped groove;

[0029] The movable part has the third roller at one end and the other end rotatably connected to the U-shaped groove;

[0030] A plurality of limiting holes vertically penetrate the U-shaped groove and the movable portion, respectively corresponding to different angle states between the fixed portion and the movable portion;

[0031] A limiting pin is detachably connected in the limiting hole.

[0032] The present invention also provides a hopper car, comprising:

[0033] The above-mentioned hopper car ballast scraping device.

[0034] The hopper car ballast scraping device of the present invention has the following beneficial effects:

[0035] 1. When the hopper car is moving, the ballast scraping device scrapes the ballast unloaded from the middle door under the action of the scraper plate and gathers the ballast in the direction of vehicle movement. The ballast particles are squeezed out from both sides or slopes of the scraper plate to achieve the effect of leveling the ballast layer. If the ballast particles gather to the point where they can cross the inclined surface of the loose ballast beam, the inclined surface and the blocking part will stagger to guide the ballast particles to both sides, avoiding blockage and turning the ballast particles at the same time.

[0036] 2. During the ballast unloading process, the hopper car unloads the ballast in the middle of the track through the middle door. The ballast layer is leveled under the forward pushing and scraping action of the ballast scraper. The ballast particles with a larger overall excess height in the ballast pile will rise along the inclined plate of the scraper and ballast leveling device and be scattered again on the track to achieve the purpose of redistributing the ballast particles evenly, thereby minimizing the workload of subsequent manual ballast adjustment and ballast leveling, timely handling the higher ballast piles in the track, and reducing the possibility of risks such as vehicle derailment and airlift.

[0037] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0039] Figure 1 A schematic structural diagram of a hopper car ballast scraping device according to embodiment 1 of the present invention is shown.

[0040] Figure 2A side view of a hopper car ballast scraping device according to embodiment 1 of the present invention is shown.

[0041] Figure 3 A top view of a hopper car ballast scraping device according to embodiment 1 of the present invention is shown.

[0042] Figure 4 A structural schematic diagram of a limiting guide mechanism of a hopper car ballast scraping device according to embodiment 1 of the present invention is shown.

[0043] Figure 5 A schematic structural diagram of a loose ballast beam of a hopper car ballast scraping device according to embodiment 1 of the present invention is shown.

[0044] Figure 6 A schematic structural diagram of a ballast scraping plate of a hopper car ballast scraping device according to embodiment 1 of the present invention is shown.

[0045] Figure 7 A schematic structural diagram of a hopper car ballast scraping device according to embodiment 2 of the present invention is shown.

[0046] Figure 8 A side view of a hopper car ballast scraping device according to embodiment 2 of the present invention is shown.

[0047] Figure 9 A top view of a hopper car ballast scraping device according to embodiment 2 of the present invention is shown.

[0048] Figure 10 A schematic structural diagram of a limiting guide mechanism of a hopper car ballast scraping device according to embodiment 2 of the present invention is shown.

[0049] Figure 11 A structural schematic diagram of a hopper car according to embodiment 1 of the present invention is shown.

[0050] Figure 12 A structural schematic diagram of a hopper car according to embodiment 2 of the present invention is shown.

[0051] Description of reference numerals:

[0052] 1. Hanging base; 2. Loose ballast beam; 3. Elastic mechanism; 4. Adjustment mechanism; 5. Limiting guide mechanism; 6. Scraper plate; 7. Mounting hole;

[0053] 2.1, slope; 2.2 blocking part;

[0054] 5.11, first connecting plate; 5.12, first roller; 5.13, second roller;

[0055] 5.21. Second connecting plate; 5.22. Third roller; 5.23. Fourth roller; 5.24. Fixed portion; 5.25. Movable portion; 5.26. Restriction hole. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0057] Example 1

[0058] like Figure 1-6 As shown, a hopper car ballast scraping device comprises:

[0059] The scraper plate 6 has an inverted isosceles trapezoidal structure;

[0060] The loose ballast beam 2 is arranged just above the ballast scraper 6. The loose ballast beam 2 includes a slope 2.1. The two ends of the slope 2.1 are provided with blocking portions 2.2 arranged alternately with the slope 2.1, which can divert the ballast particles to both sides of the slope 2.1.

[0061] Two hanging bases 1 are respectively arranged at the two ends of the bottom of the hopper car, and the two hanging bases 1 are respectively connected to the two ends of the scraper plate 6 through the elastic mechanism 3;

[0062] Two limiting guide mechanisms 5 are respectively provided at both ends of the scraping plate 6. One end of the two limiting guide mechanisms 5 away from the scraping plate 6 is slidably connected to the rail, so that the gap between the scraping plate 6 and the rail is constant.

[0063] Specifically, the ballast is leveled by the scraper plate 6 as it moves with the vehicle body, and the inverted trapezoidal shape makes it easier for the ballast to disperse to both sides under the action of the overall extrusion pressure, thereby meeting the situation where the ballast demand on both sides is greater than that in the middle, saving labor. The elastic mechanism 3 compensates for the height change of the scraper plate 6 due to the vehicle unloading ballast, and cooperates with the limiting guide mechanism 5 to keep the height of the scraper plate 6 from the ground unchanged. At the same time, the limiting guide mechanism 5 also guides the scraper plate 6 to move forward with the vehicle body inside the rail.

[0064] The loose ballast beam 2 is arranged in the middle of the upper end of the scraper plate 6, and both ends do not exceed the short side of the trapezoid. The cross-section of the slope 2.1 is an isosceles triangle with the tip pointing upward, and the cross-section of the blocking part 2.2 is a right triangle. The right angle of the right triangle is close to the direction of the vehicle head and the base angle of the isosceles triangle, and is higher than the isosceles triangle. The slope 2.1 and the blocking part 2.2 form a stepped structure (the hypotenuse of the right triangle and the hypotenuse of the isosceles triangle close to the vehicle head side form a stepped structure), so that the ballast is diverted to both sides when it encounters the loose ballast beam 2, preventing moisture accumulation and erosion in the ballast particles and preventing the ballast particles from being retained, which can effectively improve the safety, practicality and effectiveness of the entire device.

[0065] In this embodiment, an adjustment mechanism 4 is further provided between the hanging base 1 and the scraping plate 6 for making the gap between the hanging base 1 and the scraping plate 6 constant.

[0066] Specifically, the scraper plate 6 can be self-fixed under the vehicle body in the storage state through the adjustment mechanism 4, avoiding interference with the normal operation of the vehicle body and eliminating the need for frequent disassembly and installation. It can be released when in use and stored when not in use.

[0067] In this embodiment, the adjustment mechanism 4 includes:

[0068] The first through hole, the hanging base 1 is L-shaped, the vertical portion is connected to the hopper car, the horizontal portion is arranged at the end of the vertical portion away from the hopper car, and the first through hole is arranged in the horizontal portion;

[0069] A second through hole is provided on the loose ballast beam 2 and is located directly below the first through hole;

[0070] One end of the bolt passes through the first through hole and the second through hole in sequence and is exposed, and a nut is provided on the exposed end of the bolt.

[0071] Specifically, bolts are passed through the first through hole and the second through hole to cooperate with nuts to limit the gap between the hanging base 1 and the loose ballast beam 2, and then the scraper plate 6 is lifted and stored at the bottom of the vehicle body.

[0072] In this embodiment, a guide rod is vertically provided at the upper end of the loose ballast beam 2 , and the upper end of the guide rod passes through the hanging base 1 and is exposed.

[0073] Specifically, the guide rod is used to ensure that the scraper plate 6 is perpendicular to the vehicle body and the ground.

[0074] Furthermore, a plurality of guide rods are arranged at intervals, respectively arranged at both ends of the loose ballast beam 2, so as to prevent the loose ballast beam 2 and the scraper plate 6 from rotating in the horizontal plane.

[0075] In this embodiment, the elastic mechanism 3 includes a tension spring.

[0076] Specifically, the vertical height change of the scraper plate 6 caused by the vehicle unloading ballast is compensated by the tension spring, and the limiting guide mechanism 5 is used to keep the height of the scraper plate 6 from the ground unchanged. At the same time, the tension spring forces the scraper plate 6 to be close to the hanging base 1, which facilitates the storage of the scraper plate 6.

[0077] In this embodiment, the limiting guide mechanism 5 includes:

[0078] The first connecting plate 5.11 is detachably connected to both ends of the scraping plate 6;

[0079] A first horizontal rod, one end of which is connected to the first connecting plate 5.11 to form an angle, and the other end of which is provided with a first roller 5.12 in rolling connection with the upper surface of the rail;

[0080] A second horizontal rod is arranged below the first horizontal rod in parallel through the gap between the vertical rods;

[0081] The second roller 5.13 is horizontally arranged at the lower end of the second horizontal rod and is rotatably connected to the second horizontal rod. The upper side of the second roller 5.13 is slidably connected to the inner top surface of the rail.

[0082] Specifically, the limiting guide mechanism 5 and the scraper plate 6 are connected by the first connecting plate 5.11, the scraper plate 6 is limited to approach the ground by the first horizontal rod and the first roller 5.12, and the scraper plate 6 is limited to move away from the ground by the second horizontal rod and the second roller 5.13. The two cooperate to clamp the rails from both sides of the scraper plate 6, so that the scraper plate 6 moves parallel to the rails.

[0083] In this embodiment, the outer periphery of the second roller 5.13 is exposed outside the second horizontal rod, and a plurality of groups of parallel mounting holes 7 are symmetrically provided on both sides of the scraping plate 6.

[0084] Specifically, the second roller 5.13 is exposed on the second horizontal rod to prevent the second horizontal rod from contacting the rail and hindering operation, and the gap between the scraper plate 6 and the ground is adjusted and set through multiple sets of parallel mounting holes 7, thereby changing the ballast layer thickness.

[0085] In this embodiment, the hopper car ballast scraping device is used, taking the ballast unloading on the inner side of the track as an example:

[0086] Drive the hopper car equipped with a ballast scraper and filled with ballast to the work area;

[0087] Release the adjustment mechanism 4, loosen the bolts and nuts, and bring the scraper plate 6 close to the ground until the scraper plate 6 stretches the tension spring under its own weight and stabilizes;

[0088] If the tension spring is too close or too far from the ground after stretching, the distance can be adjusted by laying pads or using a crowbar, so that the height of the scraper plate 6 from the ground is consistent with the thickness of the ballast layer;

[0089] Select appropriate mounting holes 7 to install the limiting guide mechanism 5 so that the first roller 5.12 contacts the upper surface of the rail and the second roller 5.13 contacts the inner side of the rail;

[0090] Open the ballast unloading port in the middle of the vehicle, and use the ballast scraper 6 to scrape the ballast as the vehicle moves forward;

[0091] After the vehicle is unloaded, the total weight of the vehicle body will gradually become lighter. Under the action of the bogie bearing spring, the lighter vehicle body will gradually move upward, causing the height of the funnel assembly from the rail surface to become increasingly larger, that is, the hanging base 1 rises. At this time, the scraper plate 6 is fixed to the rail, and the distance change is compensated by the tension spring;

[0092] After unloading the ballast, the scraper plate 6 is restricted by a crowbar or a pressure block, and then the limiting guide mechanism 5 is removed first, and then the scraper plate 6 is stored and fixed close to the hanging base 1.

[0093] Example 2

[0094] like Figure 7-10 As shown, the difference between the hopper car ballast scraping device in this embodiment and the hopper car ballast scraping device in Example 1 is:

[0095] In this embodiment, the limiting guide mechanism 5 includes:

[0096] The second connecting plate 5.21 is detachably connected to both ends of the scraping plate 6;

[0097] A first connecting rod, one end of which is connected to the second connecting plate 5.21 to form an angle, and the other end of which is provided with a third roller 5.22 in rolling connection with the upper surface of the rail;

[0098] The third connecting rod is obliquely arranged at the lower end of the second connecting rod, and the end away from the second connecting rod is provided with a fourth roller 5.23 that is slidably connected to the inner top surface of the rail. The fourth roller 5.23 is spindle-shaped, and the outer periphery is in contact with the inner side and inner top surface of the rail.

[0099] Specifically, the limiting guide mechanism 5 and the scraper 6 are connected by the second connecting plate 5.21, the scraper 6 is limited to the ground by the first connecting rod and the third roller 5.22, and the scraper 6 is limited to the ground by the second connecting rod and the fourth roller 5.23. The two cooperate to clamp the rails from both sides of the scraper 6, so that the scraper 6 moves parallel to the rails.

[0100] In this embodiment, the first connecting rod includes:

[0101] The fixing portion 5.24 has one end connected to the second wheel connecting plate and the other end provided with a U-shaped groove;

[0102] The movable part 5.25 has a third roller 5.22 at one end and is rotatably connected to the U-shaped groove at the other end;

[0103] A plurality of limiting holes 5.26 vertically penetrate the U-shaped groove and the movable portion 5.25, corresponding to different angle states of the fixed portion 5.24 and the movable portion 5.25;

[0104] The limiting pin is detachably connected in the limiting hole 5.26.

[0105] Specifically, the fixed part 5.24 and the movable part 5.25 are rotatably connected to avoid frequent disassembly of the restricting guide mechanism 5 and the scraper plate 6. When in use, the axes of the fixed part 5.24 and the movable part 5.25 coincide. When stored, the fixed part 5.24 and the movable part 5.25 form an angle (the movable part 5.25 bends inwardly away from the rail), and the relative angle between the fixed part 5.24 and the movable part 5.25 is ensured by the limiting pin.

[0106] Furthermore, a limiting hole 5.26 is provided on the U-shaped groove, and two limiting holes 5.26 corresponding to the use state and the storage state are provided on the movable part 5.25 respectively. The limiting pin is passed through the limiting hole 5.26 to fix the movable part 5.25 and the fixed part 5.24.

[0107] In this embodiment, the hopper car ballast scraping device is used, taking the ballast unloading on the inner side of the track as an example:

[0108] Drive the hopper car equipped with a ballast scraper and filled with ballast to the work area;

[0109] Release the adjustment mechanism 4, loosen the bolts and nuts, and bring the scraper plate 6 close to the ground until the scraper plate 6 stretches the tension spring under its own weight and stabilizes;

[0110] If the tension spring is too close or too far from the ground after stretching, the distance can be adjusted by laying pads or using a crowbar, so that the height of the scraper plate 6 from the ground is consistent with the thickness of the ballast layer;

[0111] Select appropriate mounting holes 7 to install the limiting guide mechanism 5 so that the third roller 5.22 contacts the upper surface of the rail and the fourth roller 5.23 contacts the inner side of the rail;

[0112] Open the ballast unloading port in the middle of the vehicle, and use the ballast scraper 6 to scrape the ballast as the vehicle moves forward;

[0113] After the vehicle is unloaded, the total weight of the vehicle body will gradually become lighter. Under the action of the bogie bearing spring, the lighter vehicle body will gradually move upward, causing the height of the funnel assembly from the rail surface to become increasingly larger, that is, the hanging base 1 rises. At this time, the scraper plate 6 is fixed to the rail, and the distance change is compensated by the tension spring;

[0114] After unloading the ballast, the scraper plate 6 is restrained by a crowbar or a pressure block, and then the restraining pin is removed first, the movable part 5.25 is bent inwardly away from the rail and then fixed with the restraining pin, and then the scraper plate 6 is stored and fixed close to the hanging base 1.

[0115] Example 3

[0116] like Figure 11-12 As shown, a hopper car comprises:

[0117] The above-mentioned hopper car ballast scraping device.

[0118] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A ballast scraping device for a hopper car, characterized in that: include: The scraper plate has an inverted isosceles trapezoidal structure; A loose ballast beam is provided at the upper end of the ballast scraper, the loose ballast beam comprising a slope, and blocking portions arranged alternately with the slope are provided at both ends of the slope, capable of diverting ballast particles to both sides of the slope; Two hanging bases are respectively arranged at the two ends of the bottom of the hopper car, and the two hanging bases are respectively connected to the two ends of the scraper plate through elastic mechanisms; Two limiting guide mechanisms are respectively provided at both ends of the scraping plate, and one end of the two limiting guide mechanisms away from the scraping plate is in rolling connection with the rail, so that the gap between the scraping plate and the rail is constant; An adjustment mechanism is also provided between the hanging base and the scraping plate, for making the gap between the hanging base and the scraping plate constant; The regulating mechanism comprises: The first through hole is provided in the hanging base in an L-shape, wherein the vertical portion is connected to the hopper car, the horizontal portion is provided at an end of the vertical portion away from the hopper car, and the first through hole is provided in the horizontal portion; a second through hole, provided on the scraping plate and located directly below the first through hole; A bolt has one end which passes through the first through hole and the second through hole in sequence and is exposed, and a nut is provided at the exposed end of the bolt.

2. The ballast scraping device for a hopper car according to claim 1, characterized in that: A guide rod is vertically provided at the upper end of the loose ballast beam, and the upper end of the guide rod passes through the hanging base and is exposed.

3. The ballast scraping device for a hopper car according to claim 1, characterized in that: The elastic mechanism includes a tension spring.

4. The ballast scraping device for a hopper car according to claim 1, characterized in that: The limiting guide mechanism comprises: A first connecting plate is detachably connected to both ends of the scraping plate; a first horizontal rod, one end of which is connected to the first connecting plate to form an angle, and the other end of which is provided with a first roller in rolling connection with the upper surface of the rail; A second horizontal rod is arranged below the first horizontal rod in parallel through the gap between the vertical rods; The second roller is horizontally arranged at the lower end of the second horizontal rod and is rotatably connected to the second horizontal rod. The upper side of the second roller is rollingly connected to the inner top surface of the rail.

5. The ballast scraping device for a hopper car according to claim 4, characterized in that: The outer periphery of the second roller is exposed from the second horizontal rod, and a plurality of parallel mounting holes are symmetrically provided on both sides of the scraping plate.

6. The ballast scraping device for a hopper car according to claim 1, characterized in that: The limiting guide mechanism comprises: A second connecting plate is detachably connected to both ends of the scraping plate; a first connecting rod, one end of which is connected to the second connecting plate to form an angle, and the other end of which is provided with a third roller in rolling connection with the upper surface of the rail; The third connecting rod is obliquely arranged at the lower end of the second connecting plate, and the end away from the second connecting plate is provided with a fourth roller that is rollingly connected to the inner top surface of the rail. The fourth roller is spindle-shaped, and the outer periphery is in contact with the inner side surface and inner top surface of the rail.

7. The ballast scraping device for a hopper car according to claim 6, characterized in that: The first connecting rod comprises: a fixing portion, one end of which is connected to the second connecting plate and the other end of which is provided with a U-shaped groove; The movable part has the third roller at one end and the other end rotatably connected to the U-shaped groove; A plurality of limiting holes vertically penetrate the U-shaped groove and the movable portion, respectively corresponding to different angle states between the fixed portion and the movable portion; A limiting pin is detachably connected in the limiting hole.

8. A hopper car, characterized in that: include: A hopper car ballast scraping device according to any one of claims 1 to 7.

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