A container lifting ring structure

Abstract

This utility model discloses a container lifting ring structure, including a lifting ring box disposed on a container corner post; a lifting ring connector assembled within the lifting ring box; and a lifting ring installed via the lifting ring connector. The lifting ring box is recessed into the corner post, and the lifting ring does not protrude from the outer contour of the container when folded. The lifting ring connector is connected to the inner wall of the lifting ring box, and the installation position of the lifting ring connector allows the lifting ring to be folded or stored within the lifting ring box. The beneficial effects of this utility model are: this technical solution solves the transportation certificate problem caused by the excessive width of traditional lifting rings, enabling standard container shipping and reducing transportation costs by more than 30%.

Description

Technical Field

[0001] This utility model relates to the field of container technology, and in particular to a container lifting ring structure. Background Technology

[0002] As a core carrier of modern logistics, the efficiency of container loading and unloading and the convenience of transportation directly affect supply chain costs. Currently, container lifting typically relies on specialized equipment such as forklifts. However, in remote areas or scenarios with limited infrastructure, the availability of forklifts is low, making it difficult to unload containers from transport vehicles or transfer them to designated areas. To address this issue, the industry commonly adopts a solution of welding lifting rings to the corner posts of containers, using a crane to hook onto the rings for lifting, thus eliminating reliance on forklifts. However, traditional lifting ring structures have significant drawbacks: Size over-limit issues: The lifting rings are directly welded to the outer surface of the container's corner posts, causing the overall width to exceed the international standard container width limit. This results in failure to obtain container shipping certificates and necessitates transport via bulk carriers, increasing international shipping costs by 30%-50%. Structural vulnerability risk: Protruding lifting rings are prone to collisions with other objects during transport, potentially causing deformation or breakage of the rings and even localized dents in the corner posts, affecting the container's structural strength. Insufficient maintenance and adaptability: External lifting rings easily accumulate rainwater or debris, accelerating corrosion. Furthermore, the dimensions of the lifting attachments vary significantly between different crane models, making traditional fixed lifting rings incompatible with diverse lifting needs.

[0003] Furthermore, while existing technologies have attempted to alleviate oversized issues by reducing the size of the lifting ring, this results in insufficient lifting strength, failing to meet the safe lifting requirements of fully loaded containers. Therefore, how to achieve a compact design of the lifting ring structure while ensuring lifting strength, thereby meeting transportation standards and reducing overall costs, has become a pressing technical problem to be solved in this field. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a container lifting ring structure, thereby solving one or more of the above-mentioned problems in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a container lifting ring structure, the innovation of which lies in: including

[0006] Lifting ring box installed on the corner posts of the container;

[0007] Lifting eye connector assembled inside the lifting eye box;

[0008] And the lifting ring installed via the lifting ring connector;

[0009] The lifting ring box is designed to be recessed into the corner post, and the lifting ring does not protrude from the outer contour of the container when it is folded up.

[0010] The lifting ring connector is connected to the inner wall of the lifting ring box, and the installation position of the lifting ring connector allows the lifting ring to be folded or stored inside the lifting ring box.

[0011] In some embodiments, the lifting ring structure further includes a reinforcing member disposed on the outer side wall of the lifting ring box and fixedly connected to the corner post body of the container.

[0012] In some embodiments, the reinforcing member is a channel steel or square tube, and the reinforcing member extends along the length of the corner post and connects to the top and bottom corner pieces of the container.

[0013] In some embodiments, the lifting ring connector is an angle steel, one side of which is fixed to the inner wall of the lifting ring box, and the other side has a through hole for assembling the lifting ring.

[0014] In some embodiments, the distance from the center of the angle steel to the bottom sidewall of the lifting ring box is greater than the maximum length of the lifting ring, and the distance from the center of the angle steel to the top sidewall of the lifting ring box is less than the minimum length of the lifting ring.

[0015] In some embodiments, the opening of the lifting ring box is provided with a guide ramp that is inclined inward toward the corner post to avoid interference with the external structure during lifting.

[0016] In some embodiments, the eye box and the reinforcing member are fixed by penetration welding, and the cross-sectional area of ​​the reinforcing member is not less than the cross-sectional area of ​​the side wall of the eye box.

[0017] The beneficial effects of this utility model are:

[0018] Compliance: It solves the transportation certificate problem caused by the excessive width of traditional lifting rings, and can reduce transportation costs by more than 30% through standard container shipping;

[0019] Safety: The integrated design of the reinforcing components and corner posts disperses the lifting load, preventing corner post deformation, and the foldable lifting rings reduce the risk of collision damage.

[0020] Economic advantages: The choice of materials for channel steel and square tubes is flexible, balancing cost and strength requirements. The welding process is mature and suitable for mass production.

[0021] Convenience: The guide ramp design improves hoisting efficiency, and the folding structure requires no additional maintenance, making it suitable for remote areas where there are no forklifts. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of a container lifting ring structure of this utility model on a container.

[0024] Figure 2 This is a schematic diagram of the longitudinal section of the outer corner post of a container lifting ring structure according to this utility model.

[0025] Figure 3 This is a schematic diagram of the cross-section of a container lifting ring structure on the outer corner post of a container, according to the present invention.

[0026] Figure 4 This is a schematic diagram of two embodiments of the reinforcing component of a container lifting ring structure according to this utility model. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figures 1 to 4 As shown, this utility model embodiment includes: a container lifting ring structure, the specific structure of which is as follows:

[0029] Lifting ring box 100: It is made of low carbon steel plate with a thickness of 6-10mm and is stamped into shape. The whole is in the form of a "U" shaped groove structure. Its opening faces the outside of the container corner post. The depth of the groove is designed according to the wall thickness of the container corner post (usually 80-120mm). This ensures that after the lifting ring box 100 is embedded in the corner post, its outer wall is flush with the outer surface of the corner post or slightly recessed (the recess amount is ≤5mm), so that the lifting ring 300 does not protrude from the outer contour of the container when it is stored.

[0030] Lifting ring connector 200: Equal angle steel (usually L50×50×5mm or L63×63×6mm) is used. One side is fixed to the middle of the inner wall of the lifting ring box 100 by welding, and the other side has a through hole with a diameter of 20-30mm for passing through the shaft of the lifting ring 300.

[0031] Lifting ring 300: Made by forging, it is in the shape of "D" or "Ω". Its two ends are connected to the through holes of the lifting ring connector 200 through the pivot, so as to achieve 360° rotation. The maximum length of the lifting ring 300 (the distance from the center of the pivot to the end of the lifting ring 300) is 5-10mm smaller than the distance from the center of the lifting ring connector 200 to the bottom side wall of the lifting ring box 100, so as to ensure that the lifting ring 300 can be folded down and completely stored in the lifting ring box 100. The minimum length of the lifting ring 300 (the distance from the center of the pivot to the top of the lifting ring 300) is 3-5mm larger than the distance from the center of the lifting ring connector 200 to the top side wall of the lifting ring box 100, so as to avoid excessive shaking of the lifting ring 300 during lifting.

[0032] The working principle of the above structure is as follows: the lifting ring 300 is movably connected to the connector through the pivot. When not in use, it can rotate downward around the pivot and be folded and stored in the lifting ring box 100. At this time, the lifting ring 300 is located inside the corner post and does not protrude from the outer contour of the container. During hoisting, the lifting ring 300 is flipped upward to a horizontal or vertical state by external force. After the spreader hooks it, the container can be lifted.

[0033] The advantages of the above structure are: the recessed design of the lifting ring box 100 fundamentally solves the problem of excessive width caused by the traditional lifting ring 300 being welded to the outside, enabling the container to meet international transportation standards and reducing ocean freight costs; the lifting ring 300 can be folded and stored to avoid collision damage during transportation, while reducing rainwater accumulation and improving structural durability.

[0034] Setting of reinforcement component 400

[0035] The reinforcing member 400 is a channel steel (model [8 or [10) or square tube (specification 50×50×4mm or 60×60×5mm) with a length matching the height of the corner post. One side of it is welded and fixed to the outer wall (non-open side) of the lifting ring box 100, and the other side is connected to the body of the container corner post (the column part between the top and bottom corner pieces) by full welding.

[0036] The reinforcing member 400 distributes the lifting load borne by the lifting eye box 100 to the entire corner column, avoiding local stress concentration that could lead to corner column deformation.

[0037] The above structure increases the local structural strength, enabling the lifting ring 300 to withstand a vertical load of ≥30 tons, meeting the lifting requirements for both empty and fully loaded conditions.

[0038] Material selection for reinforcement 400: When the customer has no special requirements for strength, channel steel (Q235B material) is preferred, which is 15%-20% cheaper than square tube; if the customer requires a load capacity of ≥50 tons, square tube (Q345B material) is selected, and the bending strength of square tube is 20%-30% higher than that of channel steel for the same cross-sectional area.

[0039] Connection details of reinforcement 400: The two ends of reinforcement 400 are fixed to the top corner piece and bottom corner piece of the container by beveling welding, with a welding length of ≥100mm, to ensure that the load is directly transferred from the lifting ring box 100 to the corner piece (the main load-bearing component of the container) through reinforcement 400.

[0040] Detailed design of lifting eyelet connector 200 (angle steel)

[0041] Angle steel installation: The vertical edge of the angle steel is welded to the inner wall of the lifting eye box 100 (welding length ≥ 2 / 3 of the side length of the angle steel), and the horizontal edge extends towards the opening of the lifting eye box 100. The center of the through hole is 10-15mm away from the edge of the horizontal edge to ensure that the lifting eye 300 rotates without jamming.

[0042] Anti-loosening structure: The shaft and the through hole adopt a clearance fit (0.5-1mm clearance), and elastic retaining rings are set at both ends of the shaft to prevent the lifting ring 300 from falling off.

[0043] Size matching between eyelet 300 and eyelet box 100

[0044] Distance parameters: Taking the maximum length of the lifting ring 300 as 150mm as an example, the distance from the center of the lifting ring connector 200 to the bottom side wall of the lifting ring box 100 is set to 160mm (to ensure complete storage), and the distance to the top side wall is set to 140mm (to limit excessive rotation).

[0045] Design of guide ramp

[0046] A 45° guide bevel is provided at the top and bottom edges of the opening of the lifting ring box 100. The length of the bevel is 20-30mm, and the surface is polished (roughness Ra≤6.3μm).

[0047] Its working principle is: during hoisting, the lifting tool can automatically slide into the 300 position of the lifting ring through the inclined plane, reducing the time for manual alignment and improving hoisting efficiency.

[0048] Welding process and strength assurance

[0049] Penetration welding: The welding of the lifting eye box 100 and the reinforcing member 400 adopts penetration welding (weld leg height ≥ 5mm) to ensure that the weld is free of porosity and slag inclusions; the cross-sectional area of ​​the reinforcing member 400 (e.g., the cross-sectional area of ​​the channel steel is 12.74cm²) 2 The cross-sectional area of ​​the side wall of the eyelet box should not be less than 100 mm (usually 8-10 cm²). 2 This ensures the strength balance of the load transfer path.

[0050] The working principle of this technical solution is as follows: The lifting ring 300 structure achieves both storage and high-strength lifting functions through the combined design of "recessed lifting ring box 100 + foldable lifting ring 300 + reinforcing member 400". When in use, the lifting ring 300 is flipped out from the lifting ring box 100, and the lifting device is quickly aligned and hooked through the guide ramp. The lifting load is transferred through the path of lifting ring 300 → connector → lifting ring box 100 → reinforcing member 400 → corner post → corner piece, ensuring structural stability. When not in use, the lifting ring 300 is folded and stored to avoid protruding from the outside of the box.

[0051] The advantages of this technical solution are:

[0052] Compliance: It solves the transportation certificate problem caused by the 300mm overwidth of traditional lifting rings, and can be transported by standard container shipping, reducing transportation costs by more than 30%;

[0053] Safety: The integrated design of the reinforcement 400 and the corner post disperses the lifting load and prevents the corner post from deforming. The lifting ring 300 can be folded for storage to reduce the risk of collision damage.

[0054] Economic advantages: The choice of materials for channel steel and square tubes is flexible, balancing cost and strength requirements. The welding process is mature and suitable for mass production.

[0055] Convenience: The guide ramp design improves hoisting efficiency, and the folding structure requires no additional maintenance, making it suitable for remote areas where there are no forklifts.

[0056] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A container lifting ring structure, characterized in that: include Lifting ring box (100) installed on the corner post of the container; A lifting eye connector (200) assembled inside the lifting eye box (100); And the lifting ring (300) installed via the lifting ring connector (200); The lifting ring box (100) is constructed to be recessed into the corner post, and the lifting ring (300) does not protrude from the outer contour of the container when it is folded up. The lifting ring connector (200) is connected to the inner wall of the lifting ring box (100), and the installation position of the lifting ring connector (200) satisfies that the lifting ring (300) can be folded or stored in the lifting ring box (100).

2. The container lifting ring structure according to claim 1, characterized in that: The lifting ring (300) structure also includes a reinforcing member (400), which is disposed on the outer side wall of the lifting ring box (100) and fixedly connected to the corner post body of the container.

3. A container lifting ring structure according to claim 2, characterized in that: The reinforcing member (400) is a channel steel or a square tube, and the reinforcing member (400) extends along the length of the corner post and connects to the top and bottom corner pieces of the container.

4. A container lifting ring structure according to claim 1, characterized in that: The lifting ring connector (200) is an angle steel. One side of the angle steel is fixed to the inner wall of the lifting ring box (100), and the other side has a through hole for assembling the lifting ring (300).

5. A container lifting ring structure according to claim 4, characterized in that: The distance from the center of the angle steel to the bottom side wall of the lifting ring box (100) is greater than the maximum length of the lifting ring (300), and the distance from the center of the angle steel to the top side wall of the lifting ring box (100) is less than the minimum length of the lifting ring (300).

6. A container lifting ring structure according to claim 1, characterized in that: The opening of the lifting ring box (100) is provided with a guide slope, which is inclined inward toward the corner column to avoid interference with the external structure during hoisting.

7. A container lifting ring structure according to claim 2, characterized in that: The lifting ring box (100) and the reinforcing member (400) are fixed by penetration welding, and the cross-sectional area of ​​the reinforcing member (400) is not less than the cross-sectional area of ​​the side wall of the lifting ring box (100).

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