An anti-falling follow-up device for hoisting an elongated steel member

Abstract

This utility model discloses a lifting anti-falling follow-up device for slender steel components, characterized by comprising a slender steel component, lifting lug assemblies, a hook, and a wire rope; two lifting lug assemblies are provided, symmetrically arranged on the top or side of the lifting end of the steel component; each lifting lug assembly has a lifting lug and a limiting baffle; the lifting lug is a tubular structure processed from a round tube, and the limiting baffle is a disc with a diameter larger than the diameter of the lifting lug; the limiting baffle is fixedly welded to one end face of the lifting lug and aligned with the center of the lifting lug; the other end of the lifting lug is directly welded and fixed to the two side walls of the lifting end of the steel component, or by welding a base plate to that end and then welding the base plate to the end face of the lifting end of the steel component; the wire rope is a ring structure with its ends connected, one end sleeved on the lifting lug and the other end hooked on the hook. This utility model ensures smooth force transmission during lifting and also ensures lifting safety.

Description

Technical Field

[0001] This utility model belongs to the field of steel component hoisting engineering, and in particular relates to a follow-up device for preventing the detachment of slender steel components during hoisting. Background Technology

[0002] In steel structure hoisting projects, the safety and stability of steel components during hoisting are core aspects of construction quality control. For hoisting slender steel components, traditional lifting lug designs often employ plate-type or modular structures. If traditional hoisting methods are followed, such as... Figure 1 As shown, the slender steel component 1a (including the steel column) is smoothly transitioned from the horizontal assembly stage to the vertical stage. Most of its lifting lugs 2a are located on top of the steel component 1a, and the four lifting lugs 2a are connected to the hook 4a by two steel wire ropes 3a. During the lifting process, the force transmission of the steel component 1a is uneven. Before it is fully upright, the weight is mainly borne by the two steel wire ropes (the shorter ends of the two ropes) on the two lifting lugs 2a closest to the hook. During the force conversion, a sudden change occurs, gradually changing the load to all four steel wire ropes. Although this traditional lifting method can meet basic load-bearing requirements, it suffers from stress concentration, the risk of localized deformation, and insufficient dynamic adaptability of the steel wire ropes. To ensure smooth force transmission during the lifting of the steel column and reduce the risk of deformation, research is needed on a composite structure that combines dynamic follow-up and anti-detachment functions. This is not only a key requirement for improving lifting safety but also an important direction for the refined development of steel structure construction technology. Utility Model Content

[0003] This utility model provides a follow-up device for preventing the detachment of slender steel components during hoisting, which ensures that the force is transmitted smoothly during the hoisting process of the steel column and reduces the risk of deformation of the steel component.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows: A lifting and anti-falling follow-up device for slender steel components is characterized by comprising a slender steel component, a lifting lug assembly, a hook, and a wire rope; two lifting lug assemblies are provided and symmetrically arranged on the top or side of the lifting end of the steel component; each lifting lug assembly has a lifting lug and a limiting baffle; the lifting lug is a tubular structure processed from a round tube, and the limiting baffle is a disc with a diameter larger than the diameter of the lifting lug; the limiting baffle is fixedly welded to one end face of the lifting lug and aligned with the center of the lifting lug; the axis of the lifting lug is perpendicular to the length direction of the steel component; the other end of the lifting lug is directly welded and fixed to the two side walls of the lifting end of the steel component, or by welding a base plate to that end and then welding the base plate to the end face of the lifting end of the steel component; the wire rope is a ring structure with its ends connected, one end of which is sleeved on the lifting lug and the other end is hooked on the hook.

[0005] Furthermore, it also includes a T-shaped baffle, which includes a limiting rod and a T-shaped plate. The center of the horizontal plate of the T-shaped plate is aligned with the center of the limiting baffle. The T-shaped plate is installed on the limiting baffle or a steel component and can rotate around the center of the limiting baffle. The limiting rod is fixedly installed at the three ends of the T-shaped plate and is located outside the limiting baffle. The limiting rod is used to limit the wire rope so that it does not detach from the lifting lug.

[0006] Furthermore, the limiting baffle is provided with a shaft hole at its center, and a rotating shaft is installed at the center of the cross plate of the T-shaped plate. The T-shaped plate is rotatably connected to the steel component or to the limiting baffle through the rotating shaft passing through the shaft hole.

[0007] Furthermore, the limiting baffle is symmetrically provided with two arc-shaped elongated holes around its center, and the horizontal plate of the T-shaped plate is equipped with rollers at the corresponding positions of the two elongated holes. The T-shaped plate is rotatably connected to the limiting baffle through the rollers locked in the elongated holes, so that when the steel component is lifted from a horizontal state to a vertical state, the T-shaped plate keeps the horizontal plate in a horizontal state by its own weight.

[0008] Furthermore, grease is applied between the lug and the wire rope.

[0009] Compared with the prior art, the beneficial effects of this utility model are: This invention symmetrically installs two lifting lugs at the lifting end of a steel component. One end of a ring-shaped steel wire rope is looped onto the lifting lug, and the other end is hooked onto a hook. Thus, when lifting slender steel components, the contact point between the steel wire rope and the lifting lug, which is a circular tube structure, constantly changes as the steel component moves from lying down to standing upright, forming a follow-up structure. This effectively ensures the smooth transmission of force during lifting. The steel wire rope is doubly limited by a limiting baffle and a T-shaped baffle, ensuring that it will not fall off when it slips sideways on the lifting lug.

[0010] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Attached Figure Description

[0011] Figure 1 A schematic diagram of the hoisting structure for slender steel components in the prior art; Figure 2 This is a schematic diagram of the connection structure between the follower device and the steel component in Embodiment 1 of this utility model; Figure 3 This is a side view of the lug assembly according to Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the follower device structure according to Embodiment 2 of this utility model; Figure 5 This diagram shows the positional relationship between the limiting baffle and the T-shaped plate in Embodiment 2 of this utility model during the hoisting of the steel component.

[0012] The labels and their corresponding names are as follows: 1a. Steel components, 2a. Lifting lugs, 3a. Steel wire rope, 4a. Lifting hook; 1. Steel component; 2. Lifting lug assembly; 21. Lifting lug, 22. Limiting baffle, 221. Elongated hole, 23. T-shaped baffle, 231. T-shaped plate, 232. Limiting rod, 233. Shaft, 234. Roller, 3. Wire rope. Detailed Implementation Example 1

[0013] like Figure 2 , 3 As shown, a lifting anti-falling follow-up device for slender steel components includes a slender steel component, lifting lug assemblies, a hook, and a wire rope. Two lifting lug assemblies are provided, symmetrically fixed to the top or side of the lifting end of the steel component. The lifting lug assemblies are connected to the hook via the wire rope. Each lifting lug assembly includes a lifting lug, a limiting baffle, and a T-shaped baffle. The lifting lug is a tubular structure machined from a round tube, and the limiting baffle is a disc structure with a diameter larger than the lifting lug diameter. The limiting baffle is fixedly welded to one end face of the lifting lug and aligned with the center of the lifting lug. The other end of the lifting lug is directly welded to the two side walls of the lifting end of the steel component, or fixed to the lifting end face of the steel component by welding a base plate to that end and then welding the base plate to the base face. During installation, the axis of the lifting lug is perpendicular to the centerline of the steel component along its length. The wire rope adopts a loop structure with its ends connected. One end is sleeved on the lifting lug, and the other end is hooked on the hook. Grease is applied between the lifting lug and the wire rope. A T-shaped baffle is rotatably installed on the outside of the limit baffle. Both the T-shaped baffle and the limit baffle are used to limit the wire rope on the lifting lug and prevent the wire rope from slipping off the lifting lug.

[0014] Preferably, when the steel component is a rod-shaped structure with a rectangular or square cross-section, one end of the lifting lug is directly welded and fixed to the side wall of the lifting end of the steel component. When the steel component is a round rod-shaped structure, a base plate is welded to one end of the lifting lug, and then the bottom of the base plate is welded and fixed to the end face of the lifting end of the steel component. To ensure the follow-up effect during lifting and the smooth transmission of force during the lifting process, as well as to reduce local deformation, the diameter of the lifting lug is 1 / 3 to 1 / 2 of the diameter or width of the steel component at which it is welded.

[0015] The T-shaped baffle includes a T-shaped plate, limiting rods, and a rotating shaft. The center of the horizontal plate of the T-shaped plate is aligned with the center of the limiting baffle. The T-shaped plate is mounted on the limiting baffle or a steel component and can rotate around the center of the limiting baffle. Specifically, the limiting baffle has a shaft hole in its center, and the rotating shaft is installed in the center of the horizontal plate of the T-shaped plate. The T-shaped plate is rotatably connected to the steel component via the rotating shaft passing through the shaft hole (in the case where the lifting lug assembly is connected to the steel component via a lug seat, this rotatable connection to the steel component should be understood as the rotating shaft being rotatably connected to the lug seat, and the lug seat being considered part of the steel component) or rotatably connected to the limiting baffle. There are three limiting rods, which are fixedly installed at the three ends of the T-shaped plate, and the limiting rods are located outside the limiting baffle. The end of the limiting rod away from the limiting baffle is close to the welding surface between the lifting lug and the steel component or close to the welding surface between the lifting lug and the base plate.

[0016] This invention symmetrically installs two lifting lug assemblies at the lifting end of a steel component. One end of a ring-shaped steel wire rope is looped onto the lug, and the other end is hooked onto a hook. When lifting slender steel components, the contact point between the wire rope and the lug (which is a circular tubular structure) constantly changes as the steel component moves from lying down to standing upright, creating a follow-up mechanism that ensures smooth force transmission during lifting. A double-limiting system, using a limiting baffle and a T-shaped baffle, prevents the wire rope from slipping and falling off the lug. The freely rotatable T-shaped baffle ensures that it remains horizontal under its own weight during lifting operations, preventing interference between the limiting rod and the wire rope. The lifting lugs and other components can be designed with cross-sectional dimensions tailored to the specific steel component. The lugs can be fabricated and welded to the steel component simultaneously in the factory, while the follow-up device is fabricated in the factory and installed on-site. This ensures the manufacturing quality of the tooling lifting lugs and follow-up devices, while reducing on-site workload and improving lifting efficiency. Furthermore, the greater the slenderness ratio of slender steel components, the heavier they are; using the lifting follow-up anti-fall device described in this application can more effectively reduce deformation and ensure good safety. Example 2

[0017] This embodiment is largely the same as the previous one. Although the T-shaped plate is also designed to rotate around the center of the limiting baffle, the difference is that in this embodiment, the T-shaped plate is not rotatably connected to the steel component or the limiting baffle via a central pivot. For example... Figure 4 , 5As shown, in this embodiment, the limiting baffle has two arc-shaped elongated holes symmetrically arranged around its center, and the elongated holes are located in the internal area of ​​the circular tube lifting lug. Rollers are fixedly installed on the horizontal plate of the T-shaped plate at corresponding positions of the two elongated holes. The T-shaped plate is rotatably connected to the limiting baffle through the rollers locked in the elongated holes. In this embodiment, the structure of the two arc-shaped elongated holes on the limiting baffle cooperating with the two rollers on the T-shaped plate ensures that when the steel component is lifted from a horizontal state to a vertical state, the T-shaped plate, through its own weight, keeps the horizontal plate in a horizontal state, thus ensuring that the limiting rod does not affect the following effect of the wire rope.

[0018] This utility model is not limited to the specific embodiments described above. For those skilled in the art, all modifications made based on the above concept without creative effort fall within the protection scope of this utility model.

Claims

1. A hoisting anti-falling follow-up device for slender steel components, characterized in that, The system includes a slender steel component, a lifting lug assembly, a hook, and a wire rope. Two lifting lug assemblies are provided, symmetrically positioned at the top or side of the lifting end of the steel component. Each lifting lug assembly includes a lifting lug and a limiting baffle. The lifting lug is a tubular structure machined from a round tube, and the limiting baffle is a disc with a diameter larger than the lifting lug diameter. The limiting baffle is fixedly welded to one end face of the lifting lug and aligned with its center. The axis of the lifting lug is perpendicular to the length of the steel component. The other end of the lifting lug is directly welded to the two side walls of the lifting end of the steel component, or it is fixed to the lifting end face of the steel component by welding a base plate to that end and then welding the base plate to the base face. The wire rope is a loop structure with its ends connected, one end of which is sleeved on the lifting lug, and the other end is hooked onto the hook.

2. The anti-falling follow-up device for hoisting slender steel components according to claim 1, characterized in that, It also includes a T-shaped baffle, which includes a limiting rod and a T-shaped plate. The center of the horizontal plate of the T-shaped plate is aligned with the center of the limiting baffle. The T-shaped plate is installed on the limiting baffle or a steel component and can rotate around the center of the limiting baffle. The limiting rod is fixedly installed at the three ends of the T-shaped plate and is located outside the limiting baffle. The limiting rod is used to limit the wire rope so that it does not detach from the lifting lug.

3. The anti-falling follow-up device for hoisting slender steel components according to claim 2, characterized in that, The limiting baffle has a shaft hole at its center, and the T-shaped plate has a rotating shaft installed at its center. The T-shaped plate is rotatably connected to the steel component or to the limiting baffle through the rotating shaft passing through the shaft hole.

4. The anti-falling follow-up device for hoisting slender steel components according to claim 2, characterized in that, The limiting baffle is symmetrically provided with two arc-shaped elongated holes around its center. Rollers are installed on the cross plate of the T-shaped plate at the corresponding positions of the two elongated holes. The T-shaped plate is rotatably connected to the limiting baffle through the rollers locked in the elongated holes, so that when the steel component is lifted from a horizontal state to a vertical state, the T-shaped plate keeps the cross plate in a horizontal state by its own weight.

5. The anti-falling follow-up device for hoisting slender steel components according to claim 1, characterized in that, The lugs and the wire rope were coated with grease.

Images