A built-in large load-bearing lifting lug structure

Abstract

This utility model provides a built-in large load-bearing lifting lug structure for a steel frame of a large box-type structure. The steel frame includes hollow columns and beams fixedly connected to the columns. The built-in large load-bearing lifting lug structure includes a lifting lug plate, at least two stiffening plates disposed within the hollow structure of the column, and at least one lifting lug reinforcing plate disposed on the outside of the column. The column has a through hole for the lifting lug plate to pass through. The lifting lug plate passes through the through hole from one side and extends to the other side of the column. At least two stiffening plates are symmetrically disposed on both sides of the lifting lug plate, and the two ends of each stiffening plate are welded to the lifting lug plate and the inner wall of the column, respectively. The lifting lug reinforcing plate is welded between the outer wall of the column and the beam. This utility model reduces the increased equipment transport width due to the lifting lugs, avoids local stress concentration, and greatly improves the load-bearing capacity and structural safety of the lifting nodes.

Description

Technical Field

[0001] This utility model relates to a lifting lug structure for large box-type equipment, specifically a built-in large load-bearing lifting lug structure, belonging to the field of large steel structure hoisting technology. Background Technology

[0002] In the heavy industry sector, the manufacturing, transportation, and installation of large containerized equipment are crucial aspects of engineering construction. These devices are often large in size and weight; for example, a large ethylene cold box can weigh hundreds or even thousands of tons. During transportation and on-site hoisting, it is essential to rely on well-designed and reliable lifting lugs.

[0003] In existing technologies, lifting lugs used for such heavy equipment, especially the bottom lifting lugs that bear the main lifting load, are typically designed as external attachments, where a thick lifting lug plate is directly welded to the outer wall of the box frame structure. While this design is straightforward, the externally attached lifting lugs and their reinforcing structures significantly increase the overall width of the box, thus limiting transport dimensions. Furthermore, due to the enormous lifting loads (the design load of a single lifting lug can reach hundreds of tons), safely and evenly transferring concentrated point loads to the entire box frame, and avoiding localized stress concentration that could lead to structural failure, presents a significant challenge to the design of the lifting lug structure.

[0004] Therefore, there is an urgent need in this field for a lifting lug structure that can meet the requirements of ultra-high load-bearing capacity without increasing the transport width. Utility Model Content

[0005] Based on the above background, the purpose of this utility model is to provide a built-in large load-bearing lifting lug structure to solve the technical problems of existing lifting lug structures increasing the equipment transport width due to external hanging design and insufficient structural safety when bearing huge loads.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] An internal large load-bearing lifting lug structure is provided for a steel structure frame of a large box-type structure. The steel structure frame includes a column with a hollow structure and a crossbeam fixedly connected to the column. The internal large load-bearing lifting lug structure includes a lifting lug plate, at least two stiffening plates disposed within the hollow structure of the column, and at least one lifting lug reinforcing plate disposed on the outside of the column. The column has a through hole for the lifting lug plate to pass through. The lifting lug plate passes through the through hole from one side and extends to the other side of the column. At least two stiffening plates are symmetrically disposed on both sides of the lifting lug plate, and the two ends of each stiffening plate are welded to the lifting lug plate and the inner wall of the column, respectively. The lifting lug reinforcing plate is welded between the outer wall of the column and the crossbeam.

[0008] By allowing the lifting lugs to pass through the columns that serve as the main load-bearing components, the extra transport width caused by external hanging is eliminated. At the same time, by setting stiffening plates inside the columns and installing lifting lug reinforcement plates on the outside, a three-dimensional reinforcement system combining internal and external elements is formed, which effectively transmits and distributes the huge point-like lifting force to the entire frame node, thereby ensuring the safety of lifting.

[0009] Preferably, the steel structure frame further includes channel steel parallel to and adjacent to the column and diagonal bracing fixedly connected to the column. The lifting lug plate also passes through the channel steel and the diagonal bracing in sequence and is welded to the channel steel and the diagonal bracing.

[0010] The lifting lugs are not only connected to the columns, but also to multiple frame components such as the adjacent channel steel and diagonal braces. This allows the lifting load to be more fully distributed throughout the entire frame node area, avoiding excessive stress concentration on a single column and further improving structural safety.

[0011] Preferably, the stiffening plates are configured in at least two groups, with at least two stiffening plates in each group. At least one group of stiffening plates is located near one end of the lifting lug plate, and at least another group of stiffening plates is located near the other end of the lifting lug plate.

[0012] Groups of stiffening plates provide symmetrical and stable clamping support for the lifting lugs.

[0013] Preferably, the connection between the lug plate and the column, as well as the connection between the stiffening plate and the lug plate and the column, are all bevel welded.

[0014] By cutting and beveling the edges of the weldment, a connection strength and fatigue resistance exceeding that of ordinary fillet welds can be obtained.

[0015] Preferably, the lifting lug plate and the lifting lug reinforcing plate are arranged in the same vertical plane.

[0016] By placing the lifting lug plate of the force-applying component and the lifting lug reinforcement plate of the main external reinforcement component on the same plane, the lifting load can be transmitted and distributed along the most direct path, achieving efficient force transmission.

[0017] Preferably, the lug reinforcing plate is a corner brace plate with a square outline.

[0018] The square-shaped corner braces provide a sufficiently large welding contact area between the columns and beams, forming a stable support zone.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This utility model discloses a built-in large load-bearing lifting lug structure, which adopts a perforated built-in design to accommodate part of the lifting lug plate within the outline of the box frame column, reducing the increase in equipment transport width due to the lifting lug. Furthermore, by setting stiffening plates inside the column and setting lifting lug reinforcement plates on the outside, a three-dimensional reinforcement system is constructed, which enables the huge lifting load to be effectively decomposed and transferred to the main load-bearing frame such as the column and beam through multiple paths, avoiding local stress concentration and greatly improving the load-bearing capacity and structural safety of the lifting node. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of a built-in large load-bearing lifting lug structure for a steel frame of a large box body according to this utility model;

[0023] Figure 2 This is a schematic diagram of a built-in large load-bearing lifting lug structure according to this utility model;

[0024] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of section AA;

[0025] In the diagram: 1. Lifting lug plate; 2. Column; 3. Stiffening plate; 4. Channel steel; 5. Horizontal beam; 6. Diagonal brace; 7. Lifting lug reinforcing plate. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0027] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0029] An embodiment of this utility model discloses a built-in large load-bearing lifting lug structure for the steel structure frame of large box-shaped structures, such as... Figure 1 As shown, in this embodiment, it is specifically used as the bottom lifting lug structure of a steel structure frame. Figure 2 and Figure 3 As shown, the steel structure frame includes hollow columns 2 and beams 5 fixedly connected to the columns 2. The columns 2, as the main vertical load-bearing components, are square tubular profiles with hollow structures in this embodiment. The steel structure frame also includes channel steel 4 parallel to and adjacent to the columns 2, and diagonal braces 6 fixedly connected to the columns 2.

[0030] The built-in large load-bearing lug structure includes a lug plate 1, a stiffening plate 3 installed inside the hollow structure of the column 2, and a lug reinforcing plate 7 installed on the outside of the column 2. The lug part of the lug plate 1 is located on the outside of the column 2 and is used to attach the lifting cable. The column 2 has a through hole for the root of the lug plate 1 to pass through, and the lug plate 1 passes through the through hole from one side and extends to the other side of the column 2.

[0031] Four groups of stiffening plates 3 are configured. The first group of stiffening plates 3 is located near one end of the lifting lug plate 1, and the fourth group of stiffening plates 3 is located near the other end of the lifting lug plate 1, forming a symmetrical structure. The second group of stiffening plates 3 is located near one side of the middle of the lifting lug plate 1, forming a symmetrical structure with the third group of stiffening plates 3 located near the other side of the middle of the lifting lug plate 1. Each group of stiffening plates 3 consists of two plates, which are symmetrically arranged on both sides of the lifting lug plate 1, and the two ends of each stiffening plate 3 are welded to the inner walls of the lifting lug plate 1 and the column 2, respectively. When the lifting lug plate 1 is subjected to a huge upward tensile force, these stiffening plates 3 act like wedges, directly transferring the load to the entire pipe wall section of the column 2, dispersing the huge shear force from the orifice area, thereby preventing the lifting lug plate 1 from damaging the orifice of the column 2.

[0032] Two lifting lug reinforcing plates 7 are provided, welded together between the outer wall of the column 2 and the crossbeam 5. These lifting lug reinforcing plates 7 are square-shaped corner braces, providing a sufficiently large welding contact area between the column 2 and the crossbeam 5. Furthermore, the lifting lug reinforcing plates 7 are positioned in the same vertical plane as the lifting lug plate 1, ensuring that the lifting load can be transferred and distributed along the most direct path, achieving efficient force transmission. The two right-angled sides of the lifting lug reinforcing plate 7 are welded to the outer wall of the column 2 and the surface of the crossbeam 5, respectively, forming a stable support area. When the lifting force is applied to the lifting lug plate 1, the lifting lug reinforcing plate 7 can distribute part of the load from the column 2 to the crossbeam 5, enhancing the rigidity of the entire node and preventing bending deformation under stress.

[0033] The connection between the lifting lug 1 and the column 2, as well as the connection between the stiffening plate 3 and the lifting lug 1 and the column 2, are all bevel welds. By cutting and beveling the edges of the weldment, a connection strength and fatigue resistance exceeding that of ordinary fillet welds are achieved.

[0034] When the hook is hung on the lifting lug plate 1 and lifted upwards, part of the force is transmitted to the entire pipe wall of the column 2 through the contact surface between the lifting lug plate 1 and the column 2, and then through the internal stiffening plate 3; another part of the force is transmitted to the column 2 and the crossbeam 5 through the external lifting lug reinforcing plate 7; and yet another part of the force is directly transmitted to the two frame components, the channel steel 4 and the diagonal brace 6, through the part of the lifting lug plate 1 that connects the channel steel 4 and the diagonal brace 6.

[0035] In summary, this built-in large load-bearing lug structure adopts a perforated built-in design, accommodating a portion of the lug plate 1 within the outline of the box frame column 2, reducing the increased equipment transport width due to the lug. Furthermore, by setting stiffening plates 3 inside the column 2 and lug reinforcement plates 7 on the outside, a three-dimensional reinforcement system is constructed, enabling the huge lifting load to be effectively decomposed and transferred to the main load-bearing frame such as the column 2 and beam 5 through multiple paths, avoiding local stress concentration, and greatly improving the load-bearing capacity and structural safety of the lifting nodes.

[0036] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A built-in large load lifting lug structure for a steel structure frame of a large box, the steel structure frame comprising a column (2) having a hollow structure and a cross beam (5) fixedly connected with the column (2), characterized in that: The built-in large load-bearing lug structure includes a lug plate (1), at least two stiffening plates (3) disposed in the hollow structure of the column (2), and at least one lug reinforcing plate (7) disposed on the outside of the column (2). The column (2) has a through hole for the lug plate (1) to pass through. The lug plate (1) passes through the through hole from one side and extends to the other side of the column (2). At least two stiffening plates (3) are symmetrically disposed on both sides of the lug plate (1), and the two ends of each stiffening plate (3) are welded to the inner wall of the lug plate (1) and the column (2) respectively. The lug reinforcing plate (7) is welded between the outer wall of the column (2) and the crossbeam (5).

2. The built-in heavy lifting lug structure according to claim 1, characterized in that: The steel structure frame also includes a channel steel (4) that is parallel to and adjacent to the column (2) and a diagonal brace (6) that is fixedly connected to the column (2). The lifting lug (1) also passes through the channel steel (4) and the diagonal brace (6) in sequence and is welded to the channel steel (4) and the diagonal brace (6).

3. The built-in heavy lifting lug structure according to claim 1, characterized in that: The stiffeners (3) are set in at least two groups, with at least two stiffeners (3) in each group. At least one group of stiffeners (3) is set near one end of the lug plate (1), and at least another group of stiffeners (3) is set near the other end of the lug plate (1).

4. The structure of built-in heavy lifting lug according to claim 1, characterized in that: The connection between the lifting lug (1) and the column (2), as well as the connection between the stiffening plate (3) and the lifting lug (1) and the column (2), are all bevel welded.

5. The structure of built-in heavy lifting lug according to claim 1, characterized in that: The lug plate (1) and the lug reinforcement plate (7) are arranged in the same vertical plane.

6. The structure of built-in heavy lifting lug according to claim 1, characterized in that: The lug reinforcement plate (7) is a corner brace plate with a square outline.

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