Bottom door with full-surrounding type sealing structure

Abstract

The invention relates to the technical field of grain hopper cars, and discloses a bottom door with a full-surrounding type sealing structure, which comprises a bottom door frame assembly, a bottom door plate assembly longitudinally arranged in the bottom door frame assembly in a sliding manner, a wearing plate and an air cylinder assembly for driving the bottom door plate assembly to reciprocate, the bottom door plate assembly is arranged between an upper-layer frame and a lower-layer frame of the bottom door frame assembly, a plurality of transverse ridges are arranged in the upper-layer frame side by side in the longitudinal direction, and the bottom door frame assembly is divided into a plurality of small transverse door holes through the transverse ridges. Transverse strip brushes used for sealing the corresponding transverse door holes are arranged on the two sides of each transverse ridge in the longitudinal direction of the upper-layer frame, and the bottom door plate assembly is in direct contact with the wearing plate and the transverse strip brushes; the wearing plate is arranged between the upper-layer frame and the lower-layer frame of the bottom door frame assembly in the longitudinal direction of the bottom door frame assembly. Through the sealing mode that the wearing plate and the transverse strip brush are combined, the sealing performance of the grain hopper car during fine grain cargo transportation is guaranteed, and the fine grain cargo transportation and unloading capacity of the bottom door is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grain hopper vehicles, and more particularly to the technical field of a fully enclosed bottom door with a sealing structure. Background Art

[0002] At present, the bottom doors of my country's railway grain hopper cars mostly use steel-to-steel sealing, and the bottom door is sealed by adjusting the gap between the bottom door plate and the bottom door. Existing patents disclose the following technologies: The patent with publication number CN216269237U and patent name "A Sealing Structure for the Bottom Door of a Grain Hopper Car" discloses the following content: It includes a hopper plate and a bottom door frame, with a relative funnel opening provided between the hopper plate and the bottom door frame, a sealing strip extending into the funnel opening provided on the hopper plate, and a movable bottom door panel provided on the bottom door frame, wherein the sealing strip and the bottom door panel are fitted and sealed. The beneficial effects of this utility model are as follows: a gap is left between the bottom door frame and the bottom door panel to reduce the friction when the bottom door is opened and closed; the lower part of the sealing strip is made of non-metallic material, which naturally deforms after contact with the bottom door panel, and can completely seal the gap between the bottom door frame and the bottom door panel; when removing the worn sealing strip, the anti-strip studs will not fall off, and the sealing strip can be replaced without removing the bottom door frame; the sealing strip has a simple structure, is easy to process, is inexpensive, and is quick to install; the bottom door sealing structure is simple and reasonable in design, which improves the sealing performance and service life of the entire vehicle.

[0003] The patent with publication number CN209320941U and patent name "Funnel Car Bottom Door Opening and Closing Mechanism" discloses the following content: A hopper car bottom door opening and closing mechanism, including: a first bottom door and a second bottom door, the front and rear ends of the first bottom door are respectively provided with a first connecting plate, the front and rear ends of the second bottom door are respectively provided with a second connecting plate, the front and rear ends of the first bottom door are hinged to the front and rear ends of the hopper at the bottom of the hopper car through the first connecting plate, and the front and rear ends of the second bottom door are hinged to the front and rear ends of the hopper through the second connecting plate, and the first bottom door and the second bottom door are closed when the bottom door of the hopper car is closed; a connecting rod mechanism, the connecting rod mechanism connects the first connecting plate and the second connecting plate on the same side, and the opening and closing of the bottom door of the hopper car is realized by driving the movement of the first connecting plate and the second connecting plate, so that the capacity of the hopper car is maximized, the structure is stable and reliable, the bottom door can be fully opened, and the opening and closing are convenient and quick, and the opening will not invade the vehicle limit, and unloading can be done while walking.

[0004] The bottom doors of the aforementioned patents and existing grain hopper trucks mostly use a steel-on-steel seal, achieved by adjusting the gap between the bottom door plate and the bottom door. This bottom door sealing method has poor manufacturability, is difficult to manufacture, and requires high precision. In actual production, the gap between the bottom door plate and the bottom door is often widened to ensure production. This makes it impossible to transport fine-grained grains, and the bottom door has high maintenance costs. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a bottom door with a fully enclosed sealing structure.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: The present invention provides a fully enclosed sealed structure bottom door, comprising a bottom door frame assembly, a bottom door panel assembly longitudinally slidably arranged inside the bottom door frame assembly, a wear plate for sealing the connection between the bottom door panel assembly and the side wall of the bottom door frame assembly, a cylinder assembly for driving the bottom door panel assembly to reciprocate, and a roller device arranged on a lower frame of the bottom door frame assembly for supporting the bottom door panel assembly. The bottom door frame is composed of a double-layer frame welded together with aluminum alloy profiles. The bottom door panel is arranged between the upper frame and the lower frame of the bottom door frame. The bottom door panel is provided with a plurality of transverse door holes arranged in parallel along the longitudinal direction. The upper frame is provided with a plurality of transverse ridges arranged in parallel along the longitudinal direction. The transverse ridges divide the upper frame of the bottom door frame into a plurality of small transverse door holes. Each transverse ridge is provided with transverse brushes for sealing the corresponding transverse door holes on both sides of the longitudinal direction of the upper frame. The bottom door panel is in direct contact with the wear plate and the transverse brushes. The wear plate is arranged between the upper frame and the lower frame of the bottom door frame composition along the longitudinal direction of the bottom door frame composition, and the wear plate portion is overlapped on the upper portion of the longitudinal side of the bottom door panel composition.

[0007] Specifically, this solution ensures the sealing performance of the grain hopper car when transporting fine-grained goods through the sealing form of a combination of wear plates and transverse brushes, thereby improving the fine-grained grain cargo transportation and unloading capacity of the bottom door.

[0008] The bottom door frame is a multi-door hole structure of a double-layer frame formed by welding a variety of aluminum alloy profiles into one, adopts a modular design, has a simple structure, high manufacturability and is easy to manufacture.

[0009] Easy to maintain, the wear plate and horizontal brush are connected to the bottom door frame by bolts. When the wear plate and nylon brush are worn, they can be directly replaced, which reduces maintenance costs.

[0010] The sealing performance is highly manufacturable. During manufacturing, the matching dimensions of the wear plate, transverse brush and bottom door frame can be adjusted according to the welding deformation to ensure the bottom door gap, improve the bottom door sealing performance and eliminate the uncontrollable effects caused by welding deformation.

[0011] In one embodiment, the bottom door frame comprises an upper frame, a lower frame welded to the bottom of the upper frame, and a plurality of transverse ridges arranged transversely and parallelly inside the upper frame. All transverse ridges divide the upper frame into a multi-door hole structure corresponding to the plurality of transverse door holes on the bottom door panel.

[0012] In one embodiment, the upper frame includes two upper longitudinal end plates located on both sides and upper longitudinal side plates connected between the edges of the two upper longitudinal end plates. The two upper longitudinal end plates and the two upper longitudinal side plates are fixed into a square frame by welding. Each transverse ridge is parallel to the upper longitudinal end plate, and both ends of each transverse ridge are welded to the two upper longitudinal side plates.

[0013] In one embodiment, the lower frame includes two lower longitudinal end plates located on both sides and lower longitudinal side plates connected between the edges of the two lower longitudinal plates. The two lower longitudinal end plates and the two lower longitudinal side plates are fixed into a square frame by welding, and each group of cross beams is parallel to the lower longitudinal end plates.

[0014] In one embodiment, a plurality of groups of cross beams are arranged in parallel transversely inside the lower frame; the number of the transverse ridges is the same as the number of the cross beams and they correspond one to one.

[0015] In one embodiment, multiple groups of roller support plate assemblies are welded to the outside of each lower longitudinal end plate, between two adjacent groups of cross beams, and between the cross beams and the lower longitudinal end plates. Each group of roller support plate assemblies is equipped with rollers for supporting the bottom door panel.

[0016] Specifically, the setting of this structure ensures that there are multiple sets of roller support plates under each door opening.

[0017] In one embodiment, the transverse strip brush includes an aluminum alloy bracket and nylon brush whiskers installed at the bottom of the aluminum alloy bracket. The aluminum alloy bracket is an H-shaped frame structure with a bevel. The angle of the bevel prevents residue after the cargo is unloaded. The nylon brush whiskers are nylon bristles. One end of the nylon brush whiskers is wrapped with an aluminum alloy, and the aluminum alloy wrapped end of the nylon brush whiskers is embedded in the aluminum alloy bracket.

[0018] Specifically, the horizontal brush strips utilize a beveled H-shaped frame structure with nylon brush whiskers, enhancing brush interchangeability. The beveled H-shaped frame prevents cargo from remaining on the frame, improving cargo unloading efficiency. The nylon brush strips create interference fit with the bottom door panel, providing an excellent seal for small cargo while preventing the bottom door from jamming during opening and closing, and also reducing the clearance required between the bottom door frame and the bottom door assembly.

[0019] In one embodiment, each transverse spine is a hollow aluminum alloy jellyfish structure, and the transverse spine includes a transverse hollow triangular prism with a cavity at the upper portion, and the lower portion of the transverse hollow triangular prism is provided with inward support ribs on both sides of the longitudinal edge thereof; Each transverse strip brush is mounted on the outer wall of each inward-adjusted supporting rib through a bolt, and the transverse strip brush is located below the transverse hollow triangular prism of the transverse ridge.

[0020] Specifically, by retracting the supporting ribs of the transverse spine, the transverse strip brush is completely placed under the transverse hollow triangular prism of the transverse spine, which can effectively reduce the residual amount of cargo and increase the unloading area.

[0021] The horizontal spine is a jellyfish structure made of hollow aluminum profiles, and the lower part is an inward-retracted support rib that cooperates with the horizontal brush strips to ensure the horizontal sealing performance of the bottom door, increasing the unloading port area while reducing the amount of residual cargo.

[0022] In one embodiment, the wear plate is an L-shaped oil-impregnated nylon plate.

[0023] In one embodiment, one side of the wear plate is flush with the inner wall of the upper longitudinal side plate of the upper frame and is locked with the upper longitudinal side plate by bolts, and the other side of the wear plate is provided with a notch at the transverse door hole.

[0024] Specifically, the arrangement of this structure can increase the unloading area and reduce the amount of unloading residue.

[0025] Working Principle: The bottom door frame assembly comprises a double-layered, integrated frame structure with multiple transverse door openings, welded from various aluminum alloy profiles. Wear plates are positioned between the two layers of the bottom door frame assembly, and transverse brush strips are installed on either side of the door openings. The bottom door panel assembly is positioned between the two layers of the bottom door frame assembly, directly contacting the wear plates and transverse brush strips, forming a fully enclosed seal. The cylinder assembly is pinned to the bottom door panel assembly, which drives the movement of the panel assembly. Friction between the panel assembly and the roller assembly located below it opens and closes the bottom door, while ensuring a secure seal.

[0026] The beneficial effects of the present invention are as follows: 1. The sealing structure of the present invention is simple, which greatly improves the processability of the bottom door. It has a wide range of applications and is suitable for the transportation and unloading of various fine-grained grains. The grain residue is small and it is easy to maintain, which has good social benefits.

[0027] 2. The present invention ensures the sealing performance of the grain hopper car when transporting fine-grained goods through the sealing form of the wear plate and the transverse strip brush combination, thereby improving the fine-grained grain cargo transportation and unloading capacity of the bottom door.

[0028] 3. The bottom door frame of the present invention is a double-layer frame with multiple door holes formed by welding various aluminum alloy profiles into one. It adopts a modular design, has a simple structure, high manufacturability and is easy to manufacture.

[0029] 4. The present invention is easy to maintain. The wear plate and the horizontal strip brush are connected to the bottom door frame by bolts. When the wear plate and the nylon brush are worn, they can be directly replaced, which reduces maintenance costs.

[0030] 5. High sealing performance and processability. During manufacturing, the matching dimensions of the wear plate, transverse brush and bottom door frame can be adjusted according to the welding deformation to ensure the bottom door gap, improve the sealing performance of the bottom door, and eliminate the uncontrollable influence caused by welding deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural diagram of the bottom door frame; Figure 3 It is a schematic diagram of the perspective part of the structure of the bottom door frame; Figure 4 yes Figure 3 A view in one direction; Figure 5 yes Figure 3 A view in the other direction; Figure 6 It is a schematic diagram of the structure of the wear plate; Figure 7 It is a schematic diagram of the structure of the transverse spine; Figure 8 It is a structural diagram of a horizontal strip brush; Reference numerals: 1. bottom door frame assembly; 2. wear plate; 3. transverse strip brush; 4. bottom door panel assembly; 5. roller assembly; 6. cylinder assembly; 1.1, upper longitudinal end plate; 1.2, upper longitudinal side plate; 1.3, lower longitudinal side plate; 1.4, transverse spine; 1.5, lower longitudinal end plate; 1.6, crossbeam; 1.7, roller support plate assembly; 3.1. Nylon brush; 3.2. Aluminum alloy bracket. DETAILED DESCRIPTION

[0033] To make the technical problems, technical solutions, and technical effects of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] Example 1 like Figures 1 to 8 As shown, this embodiment provides a fully enclosed sealed structure bottom door, comprising a bottom door frame assembly 1, a bottom door panel assembly 4 longitudinally slidingly disposed within the bottom door frame assembly 1, a wear plate 2 for sealing the connection between the bottom door panel assembly 4 and the side wall of the bottom door frame assembly 1, a cylinder assembly 6 for driving the bottom door panel assembly 4 to reciprocate, and a roller assembly 5 disposed on the outer wall of the bottom door frame assembly 1 for supporting the bottom door panel assembly 4; The bottom door frame assembly 1 is a double-layer frame welded together from aluminum alloy profiles. The bottom door panel assembly 4 is arranged between the upper and lower frames of the bottom door frame assembly 1. The bottom door panel assembly 4 is provided with a plurality of transverse door holes arranged in parallel along the longitudinal direction. The upper frame is provided with a plurality of transverse ridges 1.4 arranged in parallel along the longitudinal direction. The transverse ridges 1.4 divide the upper frame of the bottom door frame assembly 1 into a plurality of small transverse door holes. Each transverse ridge 1.4 is provided with a transverse strip brush 3 on both sides of the longitudinal direction of the upper frame for sealing the corresponding transverse door hole. The bottom door panel assembly 4 is in direct contact with the wear plate 2 and the transverse strip brush 3. The wear plate 2 is arranged between the upper frame and the lower frame of the bottom door frame assembly 1 along the longitudinal direction of the bottom door frame assembly 1, and the wear plate 2 is partially overlapped on the upper part of the longitudinal side of the bottom door panel assembly 4.

[0038] Specifically, this solution ensures the sealing performance of the grain hopper car when transporting fine-grained goods through the sealing form of the wear plate 2 and the transverse brush 3, thereby improving the fine-grained grain cargo transportation and unloading capacity of the bottom door.

[0039] The bottom door frame component 1 is a multi-door hole structure of a double-layer frame in which a variety of aluminum alloy profiles are welded into one body. It adopts a modular design, has a simple structure, high processability and is easy to manufacture.

[0040] Easy to maintain, the wear plate 2 and the horizontal strip brush 3 are connected to the bottom door frame 1 by bolts. When the wear plate 2 and the nylon brush 3.1 are worn, they can be directly replaced, with low maintenance cost.

[0041] The sealing performance is highly manufacturable. During manufacturing, the matching dimensions of the wear plate 2, the transverse brush 3 and the bottom door frame 1 can be adjusted according to the welding deformation to ensure the bottom door gap, improve the bottom door sealing performance and eliminate the uncontrollable effects caused by welding deformation.

[0042] Working Principle: The bottom door frame assembly 1 is a one-piece double-layer frame structure with multiple transverse door openings, welded from various aluminum alloy profiles. The wear plate 2 is positioned between the two layers of the bottom door frame assembly 1; transverse brush strips 3 are located on either side of the door openings. The bottom door panel assembly 4 is positioned between the two layers of the bottom door frame assembly 1, directly contacting the wear plate 2 and transverse brush strips 3, forming a fully enclosed seal. The cylinder assembly 6 is pinned to the bottom door panel assembly 4, driving the movement of the bottom door panel assembly 4. The friction between the bottom door panel assembly 4 and the roller assembly 5 located below the bottom door panel assembly 4 opens and closes the bottom door, while ensuring the door's sealing performance.

[0043] Example 2 This embodiment is a further optimization based on the embodiment 1, specifically: The bottom door frame assembly 1 includes an upper frame, a lower frame welded to the bottom of the upper frame, and multiple transverse ridges 1.4 arranged horizontally and parallelly inside the upper frame. All transverse ridges 1.4 divide the upper frame into a multi-door hole structure corresponding to the multiple transverse door holes on the bottom door panel assembly 4.

[0044] The upper frame includes two upper longitudinal end plates 1.1 located on both sides and upper longitudinal side plates 1.2 connected between the edges of the two upper longitudinal end plates 1.1. The two upper longitudinal end plates 1.1 and the two upper longitudinal side plates 1.2 are fixed into a square frame by welding. Each transverse ridge 1.4 is parallel to the upper longitudinal end plate 1.1, and both ends of each transverse ridge 1.4 are welded to the two upper longitudinal side plates 1.2.

[0045] The lower frame includes two lower longitudinal end plates 1.5 located on both sides and lower longitudinal side plates 1.3 connected between the edges of the two lower longitudinal plates. The two lower longitudinal end plates 1.5 and the two lower longitudinal side plates 1.3 are fixed into a square frame by welding, and each group of cross beams 1.6 are parallel to the lower longitudinal end plates 1.5.

[0046] A plurality of groups of cross beams 1.6 are arranged in parallel transversely inside the lower frame; the number of the transverse spines 1.4 is the same as the number of the cross beams 1.6 and they correspond one to one.

[0047] Multiple groups of roller support plate assemblies 1.7 are welded to the outside of each lower longitudinal end plate 1.5, between two adjacent groups of cross beams 1.6, and between the cross beams 1.6 and the lower longitudinal end plate 1.5. Each group of roller support plate assembly 1.7 is equipped with rollers for supporting the bottom door panel assembly 4.

[0048] Specifically, the setting of this structure ensures that there are multiple sets of roller support plates under each door opening.

[0049] Example 3 This embodiment is a further optimization based on the second embodiment, specifically: The horizontal strip brush 3 includes an aluminum alloy bracket 3.2 and a nylon brush whisker 3.1 installed at the bottom of the aluminum alloy bracket 3.2. The aluminum alloy bracket 3.2 is an H-shaped frame structure with an inclined surface. The angle of the inclined surface prevents cargo from remaining after unloading. The nylon brush whisker 3.1 is nylon bristles. One end of the nylon brush whisker 3.1 is wrapped with aluminum alloy, and the aluminum alloy wrapped end of the nylon brush whisker 3.1 is embedded in the aluminum alloy bracket 3.2.

[0050] Specifically, the horizontal brush strip 3 utilizes a beveled H-shaped frame structure and nylon brush whiskers 3.1, enhancing brush interchangeability. The beveled H-shaped frame prevents cargo from remaining on the frame, improving cargo unloading efficiency. The nylon brush strips create interference fit with the bottom door panel, providing an excellent seal for small cargo while preventing the bottom door from jamming during opening and closing, and also reducing the clearance required between the bottom door frame and the bottom door assembly.

[0051] Example 4 This embodiment is a further optimization based on the embodiment 3, specifically: Each transverse spine 1.4 is a hollow aluminum alloy jellyfish structure, comprising a transverse hollow triangular prism with a cavity at the upper portion, and inward support ribs are provided on both sides of the longitudinal edge of the lower portion of the transverse hollow triangular prism; Each transverse strip brush 3 is mounted on the outer wall of each inward support rib by means of bolts. The transverse strip brush 3 is located below the transverse hollow triangular prism of the transverse spine 1.4.

[0052] Specifically, by the inward support ribs of the transverse spine 1.4, the transverse strip brush 3 is completely placed under the transverse hollow triangular prism of the transverse spine 1.4, which can effectively reduce the residual amount of goods and increase the unloading area.

[0053] The transverse spine 1.4 is a jellyfish structure of a hollow aluminum profile, with an inward-retracted support rib at the bottom, which cooperates with the transverse brush 3 to ensure the transverse sealing performance of the bottom door, increase the unloading port area and reduce the residual amount of cargo.

[0054] Example 5 This embodiment is a further optimization based on the embodiment 4, specifically: The wear plate 2 is an L-shaped oil-impregnated nylon plate.

[0055] One side of the wear plate 2 is flush with the inner wall of the upper longitudinal side plate 1.2 of the upper frame and is locked with the upper longitudinal side plate 1.2 by bolts. The other side of the wear plate 2 is provided with a notch at the transverse door hole.

[0056] Specifically, the arrangement of this structure can increase the unloading area and reduce the amount of unloading residue.

Claims

1. A fully enclosed sealed bottom door, characterized in that: It comprises a bottom door frame component (1), a bottom door panel component (4) longitudinally slidingly arranged inside the bottom door frame component (1), a wear plate (2) for sealing the connection between the bottom door panel component (4) and the side wall of the bottom door frame component (1), a cylinder assembly (6) for driving the bottom door panel component (4) to move back and forth, and a roller device (5) arranged on the lower frame of the bottom door frame component (1) for supporting the bottom door panel component (4); The bottom door frame component (1) is a double-layer frame welded together with aluminum alloy profiles, the bottom door panel component (4) is arranged between the upper frame and the lower frame of the bottom door frame component (1), the bottom door panel component (4) is provided with a plurality of transverse door holes arranged in parallel along the longitudinal direction, a plurality of transverse ridges (1.4) are arranged in parallel along the longitudinal direction in the upper frame, the transverse ridges (1.4) divide the upper frame of the bottom door frame component (1) into a plurality of small transverse door holes, the transverse ridges (1.4) are provided with transverse strip brushes (3) for sealing the corresponding transverse door holes on both sides of the transverse ridges (1.4) along the longitudinal direction of the upper frame, and the bottom door panel component (4) is in direct contact with the wear plate (2) and the transverse strip brush (3); The wear plate (2) is arranged between the upper frame and the lower frame of the bottom door frame component (1) along the longitudinal direction of the bottom door frame component (1), and the wear plate (2) is partially overlapped on the upper part of the longitudinal side of the bottom door panel component (4).

2. The fully enclosed sealed bottom door according to claim 1, characterized in that: The bottom door frame component (1) includes an upper frame, a lower frame welded to the bottom of the upper frame, and a plurality of transverse ridges (1.4) arranged transversely and parallelly inside the upper frame. All the transverse ridges (1.4) divide the upper frame into a multi-door hole structure corresponding to the plurality of transverse door holes on the bottom door panel component (4).

3. The fully enclosed sealed bottom door according to claim 2, characterized in that: The upper frame comprises two upper longitudinal end plates (1.1) located on both sides, and upper longitudinal side plates (1.2) connected between the edges of the two upper longitudinal end plates (1.1). The two upper longitudinal end plates (1.1) and the two upper longitudinal side plates (1.2) are fixed into a square frame by welding. Each of the transverse ridges (1.4) is parallel to the upper longitudinal end plates (1.1), and both ends of each of the transverse ridges (1.4) are welded to the two upper longitudinal side plates (1.2).

4. The fully enclosed sealed bottom door according to claim 3, characterized in that: The lower frame comprises two lower longitudinal end plates (1.5) located on both sides, and lower longitudinal side plates (1.3) connected between the edges of the two lower longitudinal plates (1.5). The two lower longitudinal end plates (1.5) and the two lower longitudinal side plates (1.3) are fixed into a square frame by welding.

5. The fully enclosed sealed bottom door according to claim 4, characterized in that: Multiple groups of crossbeams (1.6) are arranged in parallel transversely inside the lower frame, and each group of crossbeams (1.6) is parallel to the lower longitudinal end plate (1.5); the transverse spine (1.4) divides the upper frame of the bottom door frame component (1) into multiple small transverse door holes.

6. The fully enclosed sealed bottom door according to claim 5, characterized in that: Multiple groups of roller support plate assemblies (1.7) are welded to the outside of each lower longitudinal end plate (1.5), between two adjacent groups of cross beams (1.6), and between the cross beams (1.6) and the lower longitudinal end plate (1.5), and each group of roller support plate assemblies (1.7) is mounted with rollers for supporting the bottom door panel assembly (4).

7. The fully enclosed sealed bottom door according to claim 6, characterized in that: The transverse strip brush (3) comprises an aluminum alloy bracket (3.2) and nylon brush whiskers (3.1) mounted on the bottom of the aluminum alloy bracket (3.2); the aluminum alloy bracket (3.2) is an H-shaped frame structure with an inclined surface, the angle of the inclined surface preventing cargo from remaining after unloading; the nylon brush whiskers (3.1) are nylon bristles; one end of the nylon brush whiskers (3.1) is edged with aluminum alloy, and the aluminum alloy edged end of the nylon brush whiskers (3.1) is embedded in the aluminum alloy bracket (3.2).

8. The fully enclosed sealed bottom door according to claim 6, characterized in that: Each of the transverse ridges (1.4) is a hollow aluminum alloy jellyfish structure, and the transverse ridge (1.4) comprises a transverse hollow triangular prism with a cavity at the upper portion, and inward support ribs are respectively provided on both side edges of the lower portion of the transverse hollow triangular prism along the length direction; Each of the transverse strip brushes (3) is mounted on the outer wall of each of the inward-retracting support ribs by means of bolts, and the transverse strip brush (3) is located below the transverse hollow triangular prism of the transverse spine (1.4).

9. The fully enclosed sealed bottom door according to claim 6, characterized in that: The wear plate (2) is an L-shaped oil-containing nylon plate.

10. The fully enclosed sealed bottom door according to claim 9, characterized in that: One side surface of the wear plate (2) is flush with the inner wall of the upper longitudinal side plate (1.2) of the upper frame and is locked with the upper longitudinal side plate (1.2) by means of bolts. The other side surface of the wear plate (2) is provided with a notch at the transverse door hole.

Images