Foldable lifting lug on transformer
By designing a foldable lifting lug structure, the problems of interference between the lifting lug and the transformer shell components and unstable lifting were solved, thereby improving the safety and stability during the lifting process.
Patent Information
- Application Number
- CN202423125569.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The existing transformer lifting lug structure is prone to interference with the wiring components on the transformer shell, posing a risk of breakdown and leakage. Furthermore, the uneven stress on the lifting slings during the lifting process affects the stability of the lifting operation.
A foldable lifting lug structure is designed. By combining a mounting column, connecting seat, short shaft, boom, and guide head, the boom can be folded and its position adjusted. The boom is locked using a tapered structure and a spline structure to ensure its stability during lifting.
The ease of use and safety of the lifting lugs have been optimized, the risk of interference between the lifting lugs and other components has been reduced, and the stability and safety of the lifting process have been improved.
Smart Images
Figure CN223539394U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of transformer technology and relates to a foldable lifting lug on a transformer. Background Technology
[0002] The lifting lugs on the transformer casing are used for lifting and transporting the transformer. Existing lifting lugs are directly welded to the upper surface of the transformer casing. Since there are also wiring components, porcelain insulators and other components on the upper surface of the transformer casing, the lifting lugs protruding from the top surface of the casing are prone to interference with other components and pose a risk of breakdown and leakage. In addition, since the existing lifting lugs are fixed during the lifting process, they are prone to uneven stress on the lifting slings and interference between the slings and other components on the upper surface of the transformer. Therefore, it is necessary to improve the structure of the lifting lugs on the transformer. Utility Model Content
[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a foldable lifting lug for transformers. The technical problem this invention aims to solve is how to optimize the structure of the lifting lug to make it more convenient to use and safer.
[0004] The purpose of this utility model can be achieved through the following technical solution: a foldable lifting lug on a transformer, characterized in that it includes a mounting column fixed longitudinally on the transformer shell, a connecting seat rotatably connected to the mounting column, a short shaft arranged laterally fixed at both ends of the connecting seat, a U-shaped lifting arm connected between the two short shafts, and the lifting arm rotatably connected to the short shafts.
[0005] Furthermore, the upper end of the mounting post has a tapered guide head with the large-diameter end of the guide head facing upward. The through hole on the connecting seat that mates with the mounting post is adapted to the guide head. A tension spring is provided between the guide head and the connecting seat to drive the connecting seat to slide downward relative to the mounting post.
[0006] Furthermore, the outer peripheral surface of the cutter head has external splines, and the inner wall of the through hole on the connecting seat that mates with the guide head has internal splines.
[0007] The lifting lugs can be folded by rotating the short shaft and the boom, allowing the boom to lie flat on the top surface of the transformer housing. This reduces the lifting lug's extension height and minimizes interference with other components on the transformer housing. Furthermore, since the connecting seat and the guide head are also rotatably connected, the boom's position can be adjusted during hoisting to meet specific requirements. During hoisting, under tension, the boom and guide head are locked together by the guide head's tapered and splined structures, preventing the boom from rotating arbitrarily during transport. Therefore, this lifting lug structure not only optimizes the lug position during hoisting but also prevents the boom's arbitrarily rotating during transport from negatively impacting hoisting stability. Attached Figure Description
[0008] Figure 1 This is a partial sectional view of the lifting lugs of this transformer.
[0009] In the diagram, 1 is the mounting post; 2 is the connecting seat; 3 is the short shaft; 4 is the boom; 5 is the guide head; and 6 is the tension spring. Detailed Implementation
[0010] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0011] like Figure 1 The foldable lifting lug on the transformer shown includes a mounting post 1 longitudinally fixed to the transformer housing. A connecting seat 2 is rotatably connected to the mounting post 1. A short shaft 3 is fixed to each end of the connecting seat 2, arranged laterally. A U-shaped lifting arm 4 is connected between the two short shafts 3, and the lifting arm 4 is rotatably connected to the short shafts 3. The upper end of the mounting post 1 has a tapered guide head 5, with its large-diameter end facing upwards. A through hole on the connecting seat 2 that mates with the mounting post 1 is adapted to the guide head 5. A tension spring 6 is provided between the guide head 5 and the connecting seat 2 to drive the connecting seat 2 to slide downwards relative to the mounting post 1. The outer circumferential surface of the guide head 5 has external splines, and the inner wall of the through hole on the connecting seat 2 that mates with the guide head 5 has internal splines.
[0012] The lifting lug can be folded by rotating the short shaft 3 and the boom 4, allowing the boom 4 to be placed flat on the top surface of the transformer shell, reducing the lifting lug's extension height and minimizing interference with other components on the transformer shell. Furthermore, since the connecting seat 2 and the guide head 5 are also rotatably connected, the position of the boom 4 can be adjusted during hoisting to meet hoisting requirements. During hoisting, under tension, the boom 4 and guide head 5 are locked together by the tapered and splined structures of the guide head 5, preventing the boom 4 from rotating arbitrarily during hoisting. Therefore, this lifting lug structure not only optimizes the position of the lifting lug during hoisting but also prevents the boom 4 from rotating arbitrarily during hoisting, thus avoiding any adverse effects on the stability of the hoisting process.
[0013] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A foldable lifting lug for a transformer, characterized in that, It includes a mounting column (1) that is longitudinally fixed on the transformer housing, a connecting seat (2) that is rotatably connected to the mounting column (1), a short shaft (3) that is arranged laterally fixed at both ends of the connecting seat (2), and a U-shaped boom (4) that is connected between the two short shafts (3). The boom (4) and the short shaft (3) are rotatably connected.
2. The foldable lifting lug on a transformer according to claim 1, characterized in that, The upper end of the mounting post (1) has a tapered guide head (5), with the large diameter end of the guide head (5) facing upward. The through hole on the connecting seat (2) that mates with the mounting post (1) is adapted to the guide head (5). A tension spring (6) is provided between the guide head (5) and the connecting seat (2) to drive the connecting seat (2) to slide downward relative to the mounting post (1).
3. The foldable lifting lug on a transformer according to claim 2, characterized in that, The outer peripheral surface of the guide head (5) has an external spline, and the inner wall of the perforation on the connecting seat (2) that mates with the guide head (5) has an internal spline.