Shaft type side lug of a transformer
By designing supports that disperse welding stress and transformer shaft side lugs with real-time monitoring devices, the problems of stress concentration and poor anti-corrosion coating of traditional lugs are solved, thus improving the safety and reliability of hoisting.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG MINGYANG ELECTRIC CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional transformer lifting lugs suffer from stress concentration at welded joints, poor anti-corrosion coating performance, and unreliable lifting conditions, posing safety hazards, especially in extreme environments.
A shaft-type side lifting lug was designed, which includes a horizontal axis, an outer baffle, an inner baffle, a support, and a safety monitoring device. The support disperses the welding stress, and a high-hardness protective paint sleeve is used for corrosion protection. Sensors are equipped to monitor the lifting status in real time.
It effectively reduces welding stress concentration, enhances structural strength, protects the anti-corrosion coating, enables real-time monitoring and anti-slip function during hoisting, ensures hoisting safety, and adapts to complex working conditions.
Smart Images
Figure CN224530442U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to transformer hoisting structures, and more particularly to a shaft-type side lifting lug for a transformer. Background Technology
[0002] As a core component of power transmission and distribution systems, the reliability of transformer hoisting operations directly impacts grid operation safety and equipment lifecycle management. During transformer manufacturing, transportation, and installation, lifting lugs, as load-bearing connecting components, are structural members installed on transformers for lifting and must withstand long-term alternating loads, environmental corrosion, and mechanical impacts. Currently, the industry commonly uses traditional lifting lugs originating from welded structures of the 1980s. Their technical approach primarily involves cutting and welding Q235 carbon steel, supplemented by simple anti-rust coating treatment. However, with the development of power equipment towards larger capacity and higher voltage levels, and the expansion of applications in extreme environments (such as offshore wind power and chemical industrial parks), the performance limitations of traditional lifting lugs under complex operating conditions are becoming increasingly apparent.
[0003] Traditionally, transformers have shaft-type side lifting lugs welded to their side walls. During hoisting, the majority of the force on the transformer is in the vertical direction. Figure 1 As shown, the welded part at the rear end of the horizontal shaft of the shaft-type side lifting lug lacks reinforcement, which leads to stress concentration at the welded part and easy fatigue of the weld, posing a significant safety hazard to the transformer being lifted and the operators.
[0004] Secondly, the anti-corrosion coating on the surface of the transformer lifting lugs is subjected to great pressure during hoisting, and the anti-corrosion effect and lifespan of the coating after hoisting are generally not considered.
[0005] Finally, the structural strength of transformer lifting lugs cannot be determined by the naked eye, posing significant hidden dangers during actual transformer hoisting. This is especially true in offshore wind power installations, where transformers are hoisted at great heights and may be subjected to extreme conditions such as strong winds and high waves. Relying solely on visual observation of the transformer's hoisting status is unstable and unreliable, also presenting substantial safety risks. Summary of the Invention
[0006] The technical problem to be solved by this utility model is to provide a shaft-type side lifting lug for a transformer with low stress at the welded part and good safety performance.
[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a shaft-type side lug for a transformer, including a horizontal shaft, an outer baffle, an inner baffle, and a support. The outer baffle is fixed at the front end of the horizontal shaft, the inner baffle is fixed at the middle of the horizontal shaft, and the support is fixed at the rear of the horizontal shaft.
[0008] The shaft-type side lug of the transformer described above has a support consisting of multiple reinforcing plates arranged radially along the transverse axis and circumferentially separated along the transverse axis.
[0009] The above-mentioned transformer shaft-type side lifting lug has four reinforcing plates, which are evenly distributed around the circumference of the horizontal axis. The reinforcing plates are right-angled triangles, with one right-angled side welded to the outer surface of the rear part of the horizontal axis, and the other right-angled side of the reinforcing plate in the same plane as the rear end face of the horizontal axis.
[0010] The above-mentioned shaft-type side lifting lug of the transformer includes a protective enamel sleeve, which is fitted onto the transverse shaft between the outer baffle and the baffle, and the thickness of the protective enamel sleeve is greater than 0.5mm.
[0011] The shaft-type side lugs of the transformer described above have an inverted pear shape for the outer and inner baffles, and the radial dimension of the lower part of the outer and inner baffles is larger than the radial dimension of other parts.
[0012] The above-mentioned transformer shaft-type side lifting lug includes a safety monitoring device, wherein the horizontal shaft is a hollow shaft, and the safety monitoring device is arranged in the shaft hole of the horizontal shaft.
[0013] The safety monitoring device for the shaft-type side lifting lug of the transformer described above includes a speed sensor, an acceleration sensor, a pressure sensor, and an angular displacement sensor.
[0014] The safety monitoring device for the shaft-type side lug of the transformer described above includes a detection shaft and four pressure sensors. The detection shaft is installed in the shaft hole of the horizontal shaft and is coaxial with the horizontal shaft. The four pressure sensors are arranged on the outer surface of the detection shaft, located at the front of the horizontal shaft, and are evenly distributed along the circumference of the detection shaft. The outer surfaces of the four pressure sensors respectively contact the top, bottom, left and right sides of the inner wall of the horizontal shaft hole.
[0015] The aforementioned transformer's shaft-type side lifting lugs, speed sensor, acceleration sensor, and angular displacement sensor are installed in the shaft hole of the detection shaft.
[0016] The aforementioned transformer's shaft-type side lifting lug has its front end of the detection shaft connected to the outer baffle by screws.
[0017] The shaft-type side lifting lug of this utility model is welded to the side wall of the transformer through a support. The stress at the horizontal shaft welding part is dispersed by the support, which effectively reduces the stress in the weld of the shaft-type side lifting lug and improves the safety performance of the transformer shaft-type side lifting lug. Attached Figure Description
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0019] Figure 1This is a perspective view of an existing axial side lug.
[0020] Figure 2 This is a front view of the shaft-type side lifting lug of the transformer according to an embodiment of this utility model.
[0021] Figure 3 This is a top view of the shaft-type side lifting lug of the transformer according to an embodiment of this utility model.
[0022] Figure 4 This is a left view of the shaft-type side lifting lug of the transformer according to an embodiment of this utility model.
[0023] Figure 5 This is a right view of the shaft-type side lifting lug of the transformer according to an embodiment of this utility model.
[0024] Figure 6 yes Figure 5 AA section view in the image.
[0025] Figure 7 This is a perspective view of the shaft-type side lifting lug of the transformer according to an embodiment of this utility model. Detailed Implementation
[0026] The structure of the transformer shaft side lug in this embodiment of the utility model is as follows: Figures 1 to 7 As shown, it includes a horizontal axis 10, an outer baffle 20, an inner baffle 30, a support 40, a protective sleeve 50, and a safety monitoring device 60. The outer baffle 20 is fixed to the front end of the horizontal axis 10, the inner baffle 30 is fixed to the middle of the horizontal axis 10, and the support 40 is fixed to the rear of the horizontal axis 10.
[0027] The support 40 consists of four reinforcing plates 41. The reinforcing plates 41 are arranged radially along the horizontal axis 10, and the four reinforcing plates 41 are evenly distributed circumferentially along the horizontal axis 10. The reinforcing plates 41 are right-angled triangles. One right-angled side of the reinforcing plate 41 is welded to the outer surface of the rear part of the horizontal axis 10, and the other right-angled side of the reinforcing plate 41 is in the same plane as the rear end face of the horizontal axis 10. They are welded to the side plates of the transformer housing respectively.
[0028] The horizontal axis 10 is made of round steel Q235A material, and the outer baffle 20, inner baffle 30 and support 40 are made of steel plate Q235A material. It has the characteristics of suitable strength, good plasticity and toughness, low cost, good processing performance and good weather resistance.
[0029] The protective sleeve 50 is fitted over the horizontal shaft 10 between the outer baffle 20 and the baffle. The thickness of the protective sleeve 50 is greater than 0.5mm. The protective sleeve 50 is made of high-hardness nitrile rubber material, which can prevent the anti-corrosion paint on the horizontal shaft 10 from being worn or damaged by excessive pressure, thereby ensuring the anti-corrosion effect after hoisting. The protective sleeve 50 can be removed after hoisting.
[0030] The outer baffle 20 and the inner baffle 30 are inverted pear shape, and the radial dimension of the lower part of the outer baffle 20 and the inner baffle 30 is larger than the radial dimension of the other parts.
[0031] The horizontal shaft 10 is a hollow shaft, and the safety monitoring device 60 is arranged in the shaft hole 11 of the horizontal shaft 10.
[0032] The safety monitoring device 60 includes a detection shaft 61, a speed sensor 62, an acceleration sensor 63, four pressure sensors 64, and an angular displacement sensor 65. The safety monitoring device 60 is used to monitor parameters during the transformer hoisting process in real time to ensure hoisting safety.
[0033] The detection shaft 61 is installed in the shaft hole 11 of the horizontal shaft 10 and is coaxial with the horizontal shaft 10. The front end of the detection shaft 61 is connected to the outer baffle 20 by screws.
[0034] Four pressure sensors 64 are arranged on the outer surface of the detection shaft 61, located at the front of the transverse shaft 10, and evenly distributed along the circumference of the detection shaft 61. The outer surfaces of the four pressure sensors 64 respectively contact the top, bottom, left, and right sides of the inner wall of the shaft hole 11 of the transverse shaft 10.
[0035] The speed sensor 62, the acceleration sensor 63, and the angular displacement sensor 65 are installed in the shaft hole 66 of the detection shaft 61.
[0036] The shaft-type side lifting lug of the present invention is welded to the side wall of the transformer through a support. The stress at the horizontal shaft welding part is dispersed by the support, which effectively reduces the stress in the weld of the shaft-type side lifting lug and improves the safety performance of the transformer shaft-type side lifting lug.
[0037] In the above embodiments of this utility model, the shaft-type side lifting lug can monitor the transformer lifting status in real time during the transformer lifting process, strengthen the structural strength of the shaft-type side lifting lug, protect the anti-corrosion coating on the surface of the lifting lug, realize the anti-slip function, ensure the safety of transformer lifting, and lay the foundation for the safe, stable and reliable operation of the subsequent power system.
Claims
1. A shaft-type side lifting lug for a transformer, comprising a horizontal shaft and an outer baffle, the outer baffle being fixed to the front end of the horizontal shaft, characterized in that, It includes an inner baffle, a safety monitoring device, and a support. The inner baffle is fixed in the middle of the horizontal shaft, and the support is fixed in the rear of the horizontal shaft. The horizontal shaft is a hollow shaft, and the safety monitoring device is arranged in the shaft hole of the horizontal shaft.
2. The shaft-type side lifting lug of the transformer according to claim 1, characterized in that, The support includes multiple reinforcing plates, which are arranged radially along the transverse axis and circumferentially along the transverse axis.
3. The shaft-type side lifting lug of the transformer according to claim 2, characterized in that, The reinforcing plates consist of four pieces, which are evenly distributed around the circumference of the horizontal axis. Each reinforcing plate is a right-angled triangle, with one right-angled side welded to the outer surface of the rear part of the horizontal axis, and the other right-angled side of the reinforcing plate in the same plane as the rear end face of the horizontal axis.
4. The shaft-type side lifting lug of the transformer according to claim 1, characterized in that, This includes a protective sleeve, which is fitted onto the horizontal axis between the outer baffle and the baffle, and the thickness of the protective sleeve is greater than 0.5mm.
5. The shaft-type side lifting lug of the transformer according to claim 1, characterized in that, The outer and inner baffles are inverted pear shapes, and the radial dimension of the lower part of the outer and inner baffles is larger than the radial dimension of the other parts.
6. The shaft-type side lifting lug of the transformer according to claim 1, characterized in that, The safety monitoring device includes a speed sensor, an acceleration sensor, a pressure sensor, and an angular displacement sensor.
7. The shaft-type side lifting lug of the transformer according to claim 6, characterized in that, The safety monitoring device includes a detection shaft and four pressure sensors. The detection shaft is installed in the shaft hole of the horizontal shaft and is coaxial with the horizontal shaft. The four pressure sensors are arranged on the outer surface of the detection shaft, located at the front of the horizontal shaft, and are evenly distributed along the circumference of the detection shaft. The outer surfaces of the four pressure sensors respectively contact the top, bottom, left and right sides of the inner wall of the horizontal shaft hole.
8. The shaft-type side lifting lug of the transformer according to claim 7, characterized in that, The speed sensor, acceleration sensor, and angular displacement sensor are installed in the shaft hole of the detection shaft.
9. The shaft-type side lifting lug of the transformer according to claim 7, characterized in that, The front end of the detection shaft is connected to the outer baffle by screws.