Top hole plate, container and manufacturing method of top hole plate

Abstract

The invention provides a top hole plate, a container and a manufacturing method of the top hole plate. The top hole plate comprises a flat plate base body, a corrugated top face and a stable boss. The flat plate base body is provided with a first surface and a second surface which are arranged back to back in the thickness direction. The corrugated top face is formed on the flat plate base body and protrudes outwards relative to the first surface. The stable boss is formed on the flat plate base body, protrudes outwards relative to the first surface and is provided with a top hole, and the top hole penetrates through the first surface and the second surface. The stabilizing boss comprises a stabilizing face and a reinforcing face, and the stabilizing face and the corrugated top face are in smooth transition through the reinforcing face. The stabilizing boss is communicated with the corrugated top surface, so that the strength of the top hole plate can be enhanced, the middle of the top hole plate is prevented from sinking downwards, the flow guide effect is improved, and the water tightness of the top hole plate is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of containers, more particularly to a top hole plate, a container and a manufacturing method of the top hole plate. BACKGROUND

[0002] The top hole plate of a bulk container is a key component of the top of the container, and its structural strength and drainage performance directly affect the service life of the container and the safety of the goods. The prior art uses an integrated molding process to manufacture the top hole plate, and achieves lightweight design by arranging a corrugated structure around the hole area. For example, patent document CN1830593B discloses a method for manufacturing a top cover plate and a top cover plate manufactured according to the method. The stable groove and the stable surface are independent, and the overall rigidity of the top cover plate is insufficient, which may cause the surrounding top hole to be concave and accumulate water due to insufficient rigidity.

[0003] Therefore, it is necessary to provide a top hole plate, a container and a manufacturing method of the top hole plate to at least partially solve the above problems. SUMMARY

[0004] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the detailed description section. The summary section of the present application does not mean to attempt to limit the key features and essential technical features of the claimed technical solutions, nor to attempt to determine the protection scope of the claimed technical solutions.

[0005] To at least partially solve the above problems, the first aspect of the present application provides a top hole plate, comprising:

[0006] a flat plate base body having a first surface and a second surface arranged back to back along its thickness direction;

[0007] a corrugated top surface formed on the flat plate base body and protruding outward relative to the first surface, a plurality of the corrugated top surfaces extending along a first direction and being spaced apart along a second direction; and

[0008] a stable boss formed on the flat plate base body and protruding outward relative to the first surface, the stable boss being provided with a top hole penetrating through the first surface and the second surface, the stable boss comprising a stable surface and a reinforcing surface, the stable surface and the corrugated top surface being smoothly transitioned by the reinforcing surface.

[0009] According to the top hole plate of the first aspect of the present application, by arranging the stabilizing boss in communication with the corrugated top surface, the strength of the top hole plate can be enhanced, the middle can be prevented from being concave, the flow guiding effect can be improved, and the water tightness of the top hole plate can be enhanced. The stabilizing surface and the adjacent corrugated top surface are smoothly connected through the reinforcing surface, which not only enhances the integrity of the structure, but also reduces the stress concentration points and improves the durability of the top hole plate. The reinforcing surface also plays a role in strengthening the flow guiding effect and preventing rainwater from gathering around the stabilizing boss and entering the box.

[0010] Optionally, the height of the corrugated top surface relative to the first surface of the flat plate base is greater than the height of the stabilizing surface relative to the first surface of the flat plate base.

[0011] Optionally, the first corrugated top surface includes a first corrugated top surface, the first corrugated top surface is arranged in pairs, and each pair of first corrugated top surfaces is located on two opposite sides of the stabilizing boss along the first direction. The first corrugated top surfaces arranged in pairs are symmetric to each other along the first direction and extend relative to each other.

[0012] Optionally, there are at least three pairs of first corrugated top surfaces arranged in pairs.

[0013] Optionally, among the first corrugated top surfaces arranged in pairs, at least one first corrugated top surface located in the middle along the second direction is a middle corrugated top surface, the first corrugated top surfaces located on both sides of the middle corrugated top surface are side edge corrugated top surfaces, and the end of the middle corrugated top surface close to the stabilizing boss is farther away from the axis of the top hole than the end of the side edge corrugated top surface close to the stabilizing boss.

[0014] Optionally, the corrugated top surface includes a second corrugated top surface, the second corrugated top surface is arranged in pairs along the second direction and is spaced apart from the stabilizing boss, and the flat plate base is arranged between the second corrugated top surface and the stabilizing boss.

[0015] Optionally, the hole wall of the top hole extends along the axial direction of the top hole and protrudes from the upper surface of the stabilizing boss away from the flat plate base.

[0016] Optionally, the upper periphery of the hole wall of the top hole is provided with a flange, and the flange extends outwardly along the radial direction of the top hole from the hole wall.

[0017] Optionally, the height difference between the stabilizing surface and the flat plate base is less than 10 mm.

[0018] Optionally, the stabilizing surface includes:

[0019] a middle bearing area, which is configured as a circular arc wall surface concentric with the top hole with the axis of the top hole as the center;

[0020] The end transition zone extends outward horizontally along a first direction from both ends of the arc-shaped wall surface to form a connecting wing, which is smoothly connected to the adjacent corrugated top surface through the reinforcing surface; wherein,

[0021] The length of the middle bearing zone along the second direction is greater than or equal to the length of the end transition zone along the second direction.

[0022] Optionally, the transition surface between the stable boss and the flat plate base is smoothly transitioned.

[0023] Optionally, the reinforcing surface is an inclined surface.

[0024] Optionally, the transition surface is an inclined surface.

[0025] Optionally, at least part of the end of the reinforcing surface close to the stable surface is flush with at least part of the end of the transition surface close to the stable surface.

[0026] Optionally, the transition surface between the corrugated top surface and the flat plate base is smoothly transitioned.

[0027] Optionally, the height difference between the corrugated top surface and the flat plate base is 16-25mm.

[0028] Optionally, the distance between adjacent corrugated top surfaces is less than 150mm.

[0029] Optionally, the transition surface between the corrugated top surface and the flat plate base is an inclined surface.

[0030] Optionally, the transition surface between the stable boss and the flat plate base is smoothly transitioned, the corrugated top surface includes a first corrugated top surface, the transition surface between the first corrugated top surface and the flat plate base is smoothly transitioned, the top hole plate is provided with an integral through first transition surface and second transition surface, the stable boss and the first corrugated top surface are located in the area enclosed by the first transition surface and the second transition surface.

[0031] Optionally, the corrugated top surface includes a second corrugated top surface, the transition surface between the second corrugated top surface and the flat plate base is smoothly transitioned, and the second corrugated top surface is located in the area enclosed by the third transition surface.

[0032] Optionally, the cross section of the flat plate base perpendicular to the second direction is arc-shaped, which is high near the center of the top hole plate and low away from the center of the top hole plate.

[0033] Optionally, the stable surface is an inclined surface, which is high near the center of the top hole plate and low away from the center of the top hole plate.

[0034] Optionally, the at least part of the flat plate base is a continuous arch structure along the first direction, and the arch of the arch structure is 5mm-10mm.

[0035] The second aspect of the present application provides a container comprising the top hole plate.

[0036] According to the present solution, the container has similar technical effects as the top hole plate.

[0037] The third aspect of the present application provides a manufacturing method of a top hole plate, comprising the following steps:

[0038] S1, providing a flat plate, and processing a through pre-punching hole on the flat plate base;

[0039] S2, profiling the flat plate to form a corrugated top surface and a stabilizing boss on the flat plate, wherein the corrugated top surface and the stabilizing boss both protrude upward from the flat plate base, and the stabilizing boss surrounds the pre-punching hole;

[0040] S3, profiling the flat plate to stretch the edge of the pre-punching hole upward to form a cylindrical top hole rising upward from the stabilizing boss;

[0041] S4, profiling the flat plate to form an outwardly extending flange at the top end of the hole wall of the top hole.

[0042] According to the manufacturing method of the top hole plate of the third aspect of the present application, the die for profiling can be designed and replaced according to different product requirements, improving the production efficiency, and improving the processing quality and consistency of the product.

[0043] Optionally, in the step S2, the reinforcing surface connecting between the stabilizing boss and the adjacent corrugated top surface, the transition surface connecting between the stabilizing boss and the flat plate base, and the transition surface connecting between the corrugated top surface and the flat plate base are formed at the same time when the corrugated top surface and the stabilizing boss are formed.

[0044] Optionally, the step S2 uses a first die set for profiling, and the first die set is a fixed die set for forming the corrugated top surface and the stabilizing boss.

[0045] Optionally, the step S3 uses a second die set for profiling, and the second die set is a replaceable die set for forming the cylindrical hole wall and the flange.

[0046] Optionally, the second die set can be replaced according to the size of the target top hole. BRIEF DESCRIPTION OF DRAWINGS

[0047] The following drawings for embodiments of the present application are hereby incorporated into this application as part of the present application for the purpose of understanding the present application. The drawings in the present application and their descriptions serve to explain the principles of the present application. In the drawings,

[0048] Figure 1 A top view of a top hole plate according to a preferred embodiment of the present application;

[0049] Figure 2 A cross-sectional view taken along the center line A-A; Figure 1

[0050] Figure 3 An enlarged view of a portion a in FIG. 1; Figure 2

[0051] Figure 4 An enlarged view of a portion b in FIG. 1; Figure 2

[0052] Figure 5 An enlarged view of a portion c in FIG. 1; Figure 2

[0053] Figure 6 A cross-sectional view taken along the center line B-B; Figure 1

[0054] Figure 7 A cross-sectional view taken along the center line C-C; Figure 1

[0055] Figure 8 An enlarged view of a portion d in FIG. 1. Figure 7

[0056] Reference Signs List 1: Top hole plate

[0057] 10: Flat plate base

[0058] 20: Corrugated top surface

[0059] 21: First corrugated top surface

[0060] 211: Intermediate corrugated top surface

[0061] 212: Side edge corrugated top surface

[0062] 22: Second corrugated top surface

[0063] 30: Stabilizing boss

[0064] 301: Stabilizing surface

[0065] 302: Reinforcing surface

[0066]

[0067] ​​​​​​​31: Central bearing area

[0068] 32: End transition zone

[0069] 40: Top hole

[0070] 41: Hole wall

[0071] 42: Flange

[0072] 51: First transition surface

[0073] 52: Second transition surface

[0074] 53: Third transition surface

[0075] DW: Thickness direction

[0076] D1: First Direction

[0077] D2: Second Direction Detailed Implementation

[0078] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0079] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0080] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0081] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0082] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0083] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0084] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0085] Reference Figures 1 to 8 This application provides a top-hole plate 1, including a flat plate substrate 10, a corrugated top surface 20, and a stabilizing boss 30. The flat plate substrate 10 has a first surface and a second surface disposed opposite to each other along its thickness direction DW. The corrugated top surface 20 is formed on the first surface and protrudes outward relative to the first surface. The corrugated top surface 20 increases the rigidity and strength of the top-hole plate 1, especially under vertical pressure or dynamic loads, the corrugated structure can effectively disperse stress. The stabilizing boss 30 is formed on the first surface and protrudes outward relative to the first surface. The stabilizing boss 30 includes a stabilizing surface 301 and a reinforcing surface 302. The stabilizing surface 301 and the corrugated top surface 20 are smoothly transitioned through the reinforcing surface 302. The stabilizing boss 30 is provided with a top hole 40, which penetrates the first surface and the second surface for loading or other applications requiring penetration of the top-hole plate 1.

[0086] Since the height of the top cover of the top perforated plate 1 and its matching locking mechanism cannot exceed that of the corner piece, and both the top cover and the locking mechanism are mounted on the stabilizing boss 30, the stabilizing boss 30 should not be too high to allow for installation space. The corrugated top surface 20 only needs to not exceed the corner piece; it can be raised as high as possible, deepening the corrugations without affecting the internal space of the box. Specifically, the height of the corrugated top surface 20 relative to the first surface of the flat plate base 10 is greater than the height of the stabilizing boss 30 relative to the first surface of the flat plate base 10.

[0087] Multiple corrugated top surfaces 20 extend along a first direction D1 and are spaced apart along a second direction D2. This arrangement helps to reduce the weight of the top perforated plate 1 while maintaining the overall structural strength. The stabilizing surface 301 smoothly transitions to the adjacent corrugated top surface 20 via a reinforcing surface 302, which not only enhances the overall structural integrity but also reduces stress concentration points and improves the durability of the top perforated plate 1. The reinforcing surface 302 also enhances water flow, preventing rainwater from accumulating on the first surface around the stabilizing boss 30 and causing water to enter the tank. In this design, by connecting the stabilizing boss 30 to the corrugated top surface 20, not only is the strength of the top perforated plate 1 enhanced and the central depression prevented, but the water flow is also improved, thus enhancing the watertightness of the top perforated plate 1.

[0088] The flat substrate 10 is a plate-like structure with a certain thickness. It can be a flat plate or an arc-shaped plate, and its shape design is diverse to adapt to different usage scenarios and needs. When the top perforated plate 1 is installed into the container, the first surface of the flat substrate 10 faces the outside of the container, and the second surface faces the inside of the container.

[0089] The corrugated top surface 20 protrudes outward from the flat substrate 10 toward the container, forming a corrugated structure together with the flat substrate 10. The corrugated structure possesses high rigidity and strength, especially under vertical pressure or dynamic loads. Through its own deformation and stress dispersion mechanisms, the corrugated structure can evenly transfer the load across the entire surface, thereby improving the load-bearing capacity of the perforated top plate 1. Multiple corrugated top surfaces 20 extend along a specific direction and are arranged at intervals. This design reduces material usage while maintaining overall structural strength, thus reducing the weight of the perforated top plate 1. The lighter weight not only facilitates container transportation and handling, reducing transportation costs, but also reduces the load on transport vehicles, improving transportation efficiency.

[0090] Optionally, the corrugated top surface 20 includes a first corrugated top surface 21. The first corrugated top surfaces 21 are arranged in pairs, and each pair of first corrugated top surfaces 21 is located on two opposite sides of the stabilizing boss 30 along the first direction D1. The paired first corrugated top surfaces 21 are symmetrical to each other and extend relative to each other along the first direction D1.

[0091] A top hole 40 is provided in the middle of the stabilizing boss 30. Pairs of symmetrically distributed first corrugated top surfaces 21 surround the stabilizing boss 30, providing support from both sides and enhancing the structural stability around the stabilizing boss 30. This prevents insufficient structural strength in the area due to the presence of the top hole 40. The paired first corrugated top surfaces 21 cooperate with the stabilizing boss 30 to form an organic whole structure. When subjected to load, this structure can better distribute the load across the entire plate surface, fully utilizing the deformation and stress dispersion mechanism of the corrugated structure, thereby improving the overall load-bearing capacity of the top hole plate 1, enabling it to withstand greater vertical pressure or dynamic loads. The symmetrically distributed first corrugated top surfaces 21 make the top hole plate 1 more structurally balanced. When subjected to external forces, the symmetrical first corrugated top surfaces 21 on both sides can generate mutually balancing forces, reducing problems such as twisting and deformation of the top hole plate 1 due to uneven force distribution, and ensuring the shape stability and structural integrity of the top hole plate 1 during use.

[0092] Optionally, there are at least three pairs of first corrugated top surfaces 21 arranged in pairs. These three or more structural units work together to reinforce the perforated plate 1 from multiple directions and positions, enabling the perforated plate 1 to effectively transfer and distribute loads across its entire surface when subjected to vertical pressure or dynamic loads, significantly improving its resistance to deformation. For example, during container transport, the perforated plate 1 may be subjected to vertical pressure from stacked goods and dynamic loads from bumps during transport. The arrangement of multiple pairs of first corrugated top surfaces 21 can form multiple load transfer paths, allowing the load to be distributed more evenly across the entire perforated plate 1, thereby effectively preventing excessive denting or torsional deformation of the perforated plate 1 due to stress.

[0093] Optionally, among the multiple pairs of first corrugated top surfaces 21, at least one first corrugated top surface 21 located in the middle along the second direction D2 is designated as the middle corrugated top surface 211, and the first corrugated top surfaces 21 located on both sides of the middle corrugated top surface 211 are designated as side corrugated top surfaces 212. The end of the middle corrugated top surface 211 near the stabilizing boss 30 is further away from the axis of the top hole 40 than the end of the side corrugated top surface 212 near the stabilizing boss 30. The middle portion of the stabilizing boss 30 protrudes relative to its two ends, or in other words, the middle portion is further away from the center of the top hole, making the space in the middle of the stabilizing boss 30 larger, leaving space for the installation and operation of the locking lever handle, while maximizing the length of the side corrugated top surfaces 212, thus ensuring the structural strength of the top hole plate 1. The corrugated top surface 211 in the middle can form an avoidance setting according to the space required by the locking bar handle, reasonably plan the space above the top perforated plate 1, reserve the operating space of the locking bar handle, ensure that the locking bar handle can rotate and operate freely, so that the operator can smoothly complete the locking and opening of the top cover, while not wasting the valuable space on the top of the container, thus improving the space utilization rate.

[0094] Optionally, the end of the intermediate corrugated top surface 211 that is away from the stabilizing boss 30 is flush with the end of the side corrugated top surface 212 that is away from the stabilizing boss 30.

[0095] Optionally, the corrugated top surface 22 includes a second corrugated top surface 22, which is spaced apart from the stabilizing boss 30 along the second direction D2. A flat plate base 10 is provided between the second corrugated top surface 22 and the stabilizing boss 30. That is, the length of the second corrugated top surface 22 is adapted to the length of the top hole plate 1, and it is not interrupted by other structures (such as the stabilizing boss 30) along the first direction D1. The longer length of the second corrugated top surface 22 can distribute the load over a larger area, thereby further reducing the stress level in local areas and improving the overall stability and strength of the top hole plate 1.

[0096] In this design, the first corrugated top surface 21 and the second corrugated top surface 22 are spaced apart along the second direction D2. Optionally, the relative heights of the first corrugated top surface 21 and the second corrugated top surface 22 may be the same or different. The relative heights of both the first corrugated top surface 21 and the second corrugated top surface 22 are higher than the relative height of the stabilizing boss 30.

[0097] As described above, the stabilizing boss 30 protrudes outward from the flat plate base 10 toward the container. A localized reinforced area is formed around the top hole 40. When the top of the container is subjected to vertical pressure, such as the pressure generated by stacked goods, the stabilizing boss 30 can directly bear part of the load and distribute the load to the surrounding flat plate base 10. Furthermore, the height of the stabilizing surface 301 relative to the first surface of the flat plate base 10 is less than the height of the corrugated top surface 20 relative to the first surface of the flat plate base 10. Optionally, the height difference d1 between the stabilizing surface 301 and the flat plate base 10 is less than 10 mm. Preferably, the height difference d1 between the stabilizing surface 301 and the flat plate base 10 is 5 mm. The relatively low height design of the stabilizing surface 301 allows it to provide additional support around the top hole 40 without affecting the corrugated top surface 20's primary role in reinforcing rigidity, enabling the top hole plate 1 to better maintain structural stability and reduce deformation and vibration when subjected to load.

[0098] Optionally, the hole wall 41 of the top hole 40 extends along the axial direction of the top hole 40 and protrudes from the upper surface of the stabilizing boss 30 away from the flat plate base 10. The protruding hole wall 41 forms an additional reinforcing structure around the top hole 40, resisting torsional moments, reducing torsional deformation of the top hole plate 1, ensuring the structural integrity of the container top, and ensuring the safety of goods during transportation.

[0099] Optionally, the diameter of the top hole 40 is 500mm to 750mm.

[0100] Optionally, a flange 42 is provided on the upper periphery of the hole wall 41 of the top hole 40, and the flange 42 extends radially outward from the hole wall 41 along the top hole 40. The flange 42 is equivalent to adding a reinforcing rib to the edge of the top hole 40, which can effectively improve the bending stiffness of the top hole plate 1 around the top hole 40.

[0101] In this design, the top opening 40 typically needs to be used in conjunction with a sealing device on the container top cover to prevent rainwater, dust, and other contaminants from entering the container. The protruding opening wall 41 and flange 42 provide a precise mounting reference and a good sealing contact surface for the sealing device. The sealing device can fit tightly against the protruding opening wall 41 and / or flange 42 to form an effective seal, improving the container's sealing performance and protecting cargo from external environmental influences.

[0102] The stabilizing surface 301 includes a central bearing area 31 and an end transition area 32. The central bearing area 31 is constructed as an arc-shaped wall concentric with the axis of the top hole 40. The end transition area 32 extends horizontally outward from both ends of the arc-shaped wall along a first direction D1 to form connecting wings, which are smoothly connected to the adjacent corrugated top surface 20 via a reinforcing surface 302. The length of the central bearing area 31 along a second direction D2 is greater than or equal to the length of the end transition area 32 along the second direction D2.

[0103] The stabilizing boss 30 and the flat plate base 10 are smoothly transitioned through a first transition surface 51. That is, the stabilizing surface 301 and the reinforcing surface 302 are smoothly transitioned to the flat plate base 10 through the first transition surface 51. The first transition surface 51 not only enhances the overall integrity of the structure, but also reduces stress concentration points and improves the durability of the top perforated plate 1; the first transition surface 51 also plays a role in strengthening the flow guidance, preventing rainwater from accumulating around the stabilizing boss 30 and causing water to enter the tank.

[0104] As described above, a first transition surface 51 is provided between the stabilizing boss 30 and the flat plate substrate 10, and a reinforcing surface 302 is provided between the stabilizing surface 301 and the corrugated top surface 20. That is, the periphery of the stabilizing surface 301 connects the reinforcing surface 302 and the first transition surface 51. Optionally, the stabilizing surface 301 is located in the area enclosed by the reinforcing surface 302 and the first transition surface 51.

[0105] Optionally, the reinforcing surface 302 is an inclined surface. Optionally, the first transition surface 51 is an inclined surface. Compared to a vertical surface, an inclined surface can more effectively disperse and alleviate local stress, improving the overall strength and stability of the structure. From a manufacturing process perspective, the processing of inclined surfaces is relatively easy to achieve. Whether using processes such as stamping, casting, or welding, the forming of inclined surfaces is easier to control in terms of precision and quality than complex curved surfaces or sharp corners. At the same time, the design of a smoothly transitioning inclined surface also facilitates the design and manufacturing of molds, reducing production costs and manufacturing difficulty. With the reinforcing surface 302 and the first transition surface 51 as inclined surfaces, the stress on the stabilizing boss 30 can be gradually dispersed along the inclined surface direction to the corrugated top surface 20 and the flat plate base 10.

[0106] The reinforcing surface 302 and the first transition surface 51 have a smooth transition. The beveled design of the smooth transition makes the connection between the stabilizing boss 30, the corrugated top surface 20, and the flat plate base 10 more robust and stable.

[0107] Optionally, at least a portion of the reinforcing surface 302 near the stabilizing surface 301 is flush with at least a portion of the first transition surface 51 near the stabilizing surface 301. (Refer to...) Figure 1 On both sides of the stabilizing boss 30 along the first direction D1, the corrugated top surface 20 and the flat plate base 10 are arranged at intervals along the second direction D2. That is, the reinforcing surface 302 and the first transition surface 51 are connected to the stabilizing surface 301 at intervals along the second direction D2. At least part of the reinforcing surface 302 and at least part of the first transition surface 51 are flush. That is, at least part of the two sides of the stabilizing surface 301 along the first direction D1 are flush. The shape of the stabilizing surface 301 is simpler and more regular, reducing the complexity of the mold and the processing difficulty.

[0108] The first corrugated top surface 21 and the flat plate substrate 10 are smoothly transitioned by the second transition surface 52. As described above, the first transition surface 51 is provided between the stabilizing boss 30 and the flat plate substrate 10, that is, the stabilizing boss 30 and the first corrugated top surface 21 are located in the area enclosed by the first transition surface 51 and the second transition surface 52.

[0109] The second corrugated top surface 22 and the flat substrate 10 are smoothly transitioned by a third transition surface 53. The second corrugated top surface 22 is located in the area enclosed by the third transition surface 53.

[0110] In this design, the reinforcing surface 302, the first transition surface 51, and the second transition surface 52 are all smoothly transitioned, forming a regular and effective flow channel. Rainwater can flow more smoothly along these flow channels, avoiding accumulation around the top hole 40, thereby further improving the watertightness of the top hole plate 1 and preventing water from entering the container.

[0111] Optionally, the second transition surface 52 and the third transition surface 53 are inclined surfaces. The effect of the second transition surface 52 and the third transition surface 53 with inclined surface structure is the same as that of the reinforcing surface 302 and the first transition surface 51 with inclined surface structure, which will not be described again here.

[0112] The height difference d2 between the corrugated top surface 20 and the flat substrate 10 is 16mm to 25mm. Preferably, the height difference d2 between the corrugated top surface 20 and the flat substrate 10 is 18mm. Compared with the corrugated plates in the prior art, the perforated plate 1 of this application has deeper corrugations. The deeper corrugations can increase the structural stiffness and strength of the perforated plate 1, enabling it to better withstand these loads and reduce the risk of deformation and damage. The deeper corrugations can also form a greater slope, which is conducive to the rapid sliding of rainwater and snow, preventing accumulation on the top and thus reducing damage to the container structure caused by excessive water or snow accumulation.

[0113] The spacing d3 between adjacent corrugated top surfaces 20 is less than 150 mm. Preferably, the spacing d3 between adjacent corrugated top surfaces 20 is 124 mm. Compared with the corrugated plates in the prior art, the perforated plate 1 of this application has a smaller wave pitch. The reduced wave pitch means that the number of corrugations increases within the same length range. Each corrugation can be regarded as a small support structure. The dense corrugations work together to greatly improve the bending stiffness of the perforated plate 1.

[0114] Optionally, the cross-section of the flat plate substrate 10 along the second direction D2 is an arc shape with a high center near the top hole plate 1 and a low center away from the top hole plate 1. At least a portion of the flat plate substrate 10 is a continuous arched structure along the first direction D1, and the camber d4 of the arched structure is 5mm to 10mm.

[0115] Optionally, the stabilizing surface 301 is an inclined surface that is higher near the center of the top hole plate 1 and lower away from the center of the top hole plate 1.

[0116] As described above, the arched structure significantly improves the bending and shear resistance of the flat substrate 10. Because the arched top perforated plate 1 has a certain slope, rainwater can flow quickly down the curved surface during rainfall, reducing the time water stays at the top and lowering the risk of rainwater seeping into the container, thus protecting the goods from moisture.

[0117] In this scheme, camber refers to the vertical distance between the highest point and the lowest points at both ends of the span along the first direction D1, based on the reference plane.

[0118] In this design, the top perforated plate 1 is integrally molded. This integral molding creates a continuous and complete structure, avoiding gaps and weak points that can occur with splicing multiple components. This allows it to better withstand complex loads and ensure the structural integrity and stability. Furthermore, the integrally molded top perforated plate 1 eliminates the need for splicing and assembling multiple components; it can be installed as a whole onto the top of the container, simplifying the assembly process and reducing installation time and labor costs.

[0119] This solution also provides a container equipped with the aforementioned perforated top plate 1. The perforated top plate 1 is installed onto the top frame of the container. After installation onto the top frame, the perforated top plate 1 forms an organic whole with the frame. The corrugated structure and stabilizing bosses 30 on the perforated top plate 1 can cooperate with the top frame to jointly bear the various loads experienced by the container during transportation and storage.

[0120] Alternatively, the above-mentioned containers can be used as bulk cargo containers.

[0121] This solution also provides a method for manufacturing a top hole plate 1, including the following steps:

[0122] S1. Provide a flat plate, and machine through pre-punched holes on the flat plate substrate 10;

[0123] S2. The plate is press-formed to form a corrugated top surface 20 and a stabilizing boss 30 on the plate. Both the corrugated top surface 20 and the stabilizing boss 30 protrude upward from the plate base 10, and the stabilizing boss 30 surrounds the pre-punched hole.

[0124] S3. Perform a pressing process on the flat plate, stretching the edge of the pre-punched hole upward to form a cylindrical top hole 40 that rises from the self-stabilizing boss 30.

[0125] S4. The flat plate is press-formed to form an outwardly extending flange 42 at the top of the hole wall 41 of the top hole 40.

[0126] In step S1, the flat plate serves as the base material for fabricating the top hole plate 1. The flat plate has a smooth surface, facilitating subsequent processing operations. Optionally, the flat plate can be a planar plate or a curved plate. Pre-punching provides an initial opening for subsequent operations such as stretching. The size of the opening is determined based on the top hole size, reducing the difficulty and complexity of subsequent processing. The pre-punched hole penetrates both the first and second surfaces of the flat plate substrate 10.

[0127] In step S2, the formation of the corrugated top surface 20 and the stabilizing boss 30 significantly improves the overall strength and rigidity of the top plate 1. Optionally, in step S2, when forming the corrugated top surface 20 and the stabilizing boss 30, a reinforcing surface 302 connecting the stabilizing boss 30 and the adjacent corrugated top surface 20, a first transition surface 51 connecting the stabilizing boss 30 and the flat plate base 10, a second transition surface 52 connecting the first corrugated top surface 21 and the flat plate base 10, and a third transition surface 53 connecting the second corrugated top surface 22 and the flat plate base 10 are also formed. The setting of the reinforcing surfaces not only enhances the overall structure but also strengthens the flow guidance.

[0128] Optionally, step S2 uses a first mold set for pressing. The first mold set is a fixed mold set used to form the corrugated top surface 20 and the stabilizing boss 30. In step S2, the process of forming the corrugated top surface 20 and the stabilizing boss 30 is relatively stable, so frequent mold changes are not required. The fixed mold set can ensure the consistency and stability of the processing, reduce dimensional deviations and shape errors caused by mold changes, improve the product qualification rate, and also improve production efficiency, while reducing the cost and time waste caused by mold changes.

[0129] Optionally, step S3 uses a second mold set for pressing. The second mold set is a replaceable mold set used to form the cylindrical hole wall 41 and the flange 42. The second mold set can be replaced according to the size of the top hole 40.

[0130] Optionally, the second mold assembly can be replaced according to the size of the target top hole 40. The size and shape of the top hole 40 may vary depending on different container models and usage requirements. The replaceable assembly can be easily replaced according to the size of the target top hole 40, improving the flexibility and adaptability of the production line. It can quickly adjust the production of top hole plates 1 of different specifications, reduce production downtime caused by changing product models, improve production efficiency and economic benefits, meet the diversified needs of the market, and enhance the versatility and competitiveness of the product.

[0131] Optionally, step S2 uses a fixed first mold group, and step S3 uses a replaceable second mold group. Steps S2 and S3 can be processed separately, or the first mold group and the second mold group can be combined for unified pressing.

[0132] Optionally, step S4 uses a conventional spinning die.

[0133] In this design, the material of the top perforated plate 1 includes, but is not limited to, carbon steel, stainless steel, or a combination of carbon steel and stainless steel. Optionally, the surrounding area of ​​the top perforated plate 1 (such as the area around the flat substrate 10, the corrugated top surface 20, and the stabilizing boss 30 away from the top hole 40) is made of carbon steel, while the central area of ​​the top perforated plate 1 (the area near the central boss of the top hole 40) is made of stainless steel. The use of stainless steel around the top hole 40 allows for the loading of special goods (such as corrosive goods), and the spliced ​​design can meet the loading requirements of special goods while reducing material costs.

[0134] For example, when the material of the top hole plate 1 is a splicing material, after the carbon steel plate is punched in step S1, a suitable size of annular stainless steel ring is selected according to the size of the preset top hole 40. The carbon steel plate and the annular stainless steel ring are spliced ​​together by welding, and then the forming process of S2 to S4 is carried out.

[0135] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0136] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A perforated plate, characterized in that, include: A flat substrate having a first surface and a second surface disposed opposite to each other along its thickness direction; A corrugated top surface, formed on the flat substrate and convex outward relative to the first surface, wherein a plurality of the corrugated top surfaces extend along a first direction and are spaced apart along a second direction; and A stabilizing boss is formed on the flat plate substrate and protrudes outward relative to the first surface. The stabilizing boss has a top hole that passes through the first surface and the second surface. The stabilizing boss includes a stabilizing surface and a reinforcing surface. The stabilizing surface and the corrugated top surface are smoothly transitioned through the reinforcing surface.

2. The top perforated plate according to claim 1, characterized in that, The height of the corrugated top surface relative to the first surface of the flat substrate is greater than the height of the stable surface relative to the first surface of the flat substrate.

3. The top perforated plate according to claim 1, characterized in that, The corrugated top surface includes a first corrugated top surface, which is arranged in pairs. Each pair of first corrugated top surfaces is located on two opposite sides of the stabilizing boss along the first direction. The paired first corrugated top surfaces are symmetrical to each other and extend relative to each other along the first direction.

4. The top perforated plate according to claim 3, characterized in that, There are at least three pairs of the first corrugated top surfaces arranged in pairs.

5. The top perforated plate according to claim 3, characterized in that, In the first corrugated top surface provided, at least one first corrugated top surface located in the middle along the second direction is the middle corrugated top surface, and the first corrugated top surfaces located on both sides of the middle corrugated top surface are the side corrugated top surfaces. The end of the middle corrugated top surface near the stabilizing boss is further away from the axis of the top hole than the end of the side corrugated top surface near the stabilizing boss.

6. The top perforated plate according to claim 1, characterized in that, The corrugated top surface includes a second corrugated top surface, which is spaced apart from the stabilizing boss along the second direction, and a flat substrate is provided between the second corrugated top surface and the stabilizing boss.

7. The top perforated plate according to claim 1, characterized in that, The wall of the top hole extends along the axial direction of the top hole and protrudes from the upper surface of the stabilizing boss away from the flat plate substrate.

8. The top perforated plate according to claim 7, characterized in that, The upper edge of the hole wall of the top hole is provided with a flange, which extends radially outward from the hole wall along the top hole.

9. The top perforated plate according to claim 1, characterized in that, The height difference between the stabilizing surface and the flat substrate is less than 10 mm.

10. The top hole plate according to any one of claims 1 to 9, characterized in that, The stable surface includes: The central bearing area is constructed with the axis of the top hole as the center, and is an arc-shaped wall concentric with the top hole; The end transition zone extends horizontally outward from both ends of the arc-shaped wall surface to form connecting wings, which are smoothly connected to the adjacent corrugated top surface through the reinforcing surface; wherein, The length of the central bearing area along the second direction is greater than or equal to the length of the end transition area along the second direction.

11. The top perforated plate according to claim 10, characterized in that, The stabilizing boss and the flat substrate are smoothly transitioned through a transition surface; wherein... The reinforcing surface is an inclined surface; and / or The transition surface is an inclined plane.

12. The top perforated plate according to claim 10, characterized in that, At least a portion of the reinforcing surface is flush with the end of the stabilizing surface near the stabilizing surface near the transition surface.

13. The top perforated plate according to claim 1, characterized in that, The corrugated top surface and the flat substrate are smoothly transitioned through a transition surface.

14. The top perforated plate according to claim 1 or 13, characterized in that, The height difference between the corrugated top surface and the flat substrate is 16mm to 25mm; and / or The spacing between adjacent corrugated top surfaces is less than 150 mm; and / or The transition surface between the corrugated top surface and the flat substrate is an inclined surface.

15. The top perforated plate according to claim 1, characterized in that, The stabilizing boss and the flat plate substrate are smoothly transitioned through a first transition surface. The corrugated top surface includes a first corrugated top surface, and the first corrugated top surface and the flat plate substrate are smoothly transitioned through a second transition surface. The top perforated plate is provided with an integrally continuous first transition surface and second transition surface. The stabilizing boss and the first corrugated top surface are located in the area enclosed by the first transition surface and the second transition surface; and / or The corrugated top surface includes a second corrugated top surface, which is smoothly transitioned to the flat substrate by a third transition surface, and the second corrugated top surface is located in the area enclosed by the third transition surface.

16. The top hole plate according to any one of claims 1 to 9, 13, and 15, characterized in that, The flat substrate has an arc-shaped cross-section perpendicular to the second direction, with a height higher near the center of the top perforated plate and a lower height further away from the center of the top perforated plate; and / or The stabilizing surface is an inclined surface that is higher near the center of the top perforated plate and lower away from the center of the top perforated plate.

17. The top perforated plate according to claim 1, characterized in that, At least a portion of the flat substrate is a continuous arched structure along a first direction, and the arch of the arched structure is 5mm to 10mm.

18. A container, characterized in that, Includes the top hole plate according to any one of claims 1 to 17.

19. A method for manufacturing a perforated plate, characterized in that, Includes the following steps: S1. Provide a flat plate, and machine through pre-punched holes in the flat plate substrate; S2. The plate is press-formed to form a corrugated top surface and a stabilizing boss on the plate. Both the corrugated top surface and the stabilizing boss protrude upward from the plate base, and the stabilizing boss surrounds the pre-punched hole. S3. The flat plate is press-formed to stretch the edge of the pre-punched hole upward to form a cylindrical top hole that rises from the stabilizing boss. S4. The plate is press-formed to form an outwardly extending flange at the top of the hole wall of the top hole.

20. The method for manufacturing a top-hole plate according to claim 19, characterized in that, In step S2, while forming the corrugated top surface and the stabilizing boss, a reinforcing surface connecting the stabilizing boss and the adjacent corrugated top surface, a transition surface connecting the stabilizing boss and the flat plate substrate, and a transition surface connecting the corrugated top surface and the flat plate substrate are simultaneously formed.

21. A method for manufacturing a top-hole plate according to any one of claims 19 to 20, characterized in that, Step S2 uses a first mold set for pressing, the first mold set being a fixed mold set used to form the corrugated top surface and the stabilizing boss; and / or Step S3 uses a second mold set for pressing. The second mold set is a replaceable mold set used to form cylindrical hole walls and flanges.

22. The method for manufacturing a top-hole plate according to claim 21, characterized in that, The second mold assembly can be changed according to the size of the target top hole.

Images