A transformer bushing lifting device

Abstract

The utility model discloses a transformer bushing hoisting device, including fixed cross, four through grooves that are circumferentially equidistantly arranged are seted up on the fixed cross, a plurality of through grooves all slide and be connected with the moving slider, the lower extreme of four moving sliders all is fixedly connected with the clamping plate. The utility model discloses reasonable in structure, through the connecting rod drive structure, when moving cross lifting, four moving sliders can synchronous drive along the through groove radial movement, and then adjust the clamping area diameter that clamping plate surrounds, adapt to different specifications diameter's transformer bushing, need not additional replacement clamping part, convenient clamping simultaneously, and the efficiency is higher, adopts four circumferentially equidistantly distributed clamping plate cooperation trapezoidal rubber block, and trapezoidal block can increase the contact area and friction force with the bushing surface, and the rubber material can avoid damaging the bushing surface, and realize self-centering clamping simultaneously, effectively prevent the bushing sliding, shaking in the process of lifting.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tools for disassembling and assembling power equipment, and in particular to a transformer bushing lifting device. Background Technology

[0002] Transformer bushings are one of the key components of a transformer. During installation, they need to be precisely hoisted to the installation position and fixed using a lifting device.

[0003] Existing transformer bushing lifting devices generally suffer from the following problems: poor adaptability of the clamping structure, making it difficult to accommodate bushings of different diameters; inconvenient adjustment of clamping force, easily leading to bushing slippage due to excessively loose clamping, or damage to the bushing surface due to excessively tight clamping; insufficient bushing stability during lifting, prone to displacement and shaking, affecting installation accuracy and construction safety; and complex operation and low installation efficiency. To address these technical deficiencies, this utility model proposes a transformer bushing lifting device with a reasonable structure, stable clamping, strong adaptability, and convenient operation. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a transformer bushing lifting device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A transformer bushing lifting device includes a fixed crossbar with four circumferentially spaced through slots. Each of the through slots has a movable slider slidably connected to it. The lower ends of each of the four movable sliders are fixedly connected to clamps. The inner sides of each of the four clamps are fixedly connected to multiple equally spaced locking blocks. A movable crossbar is positioned above the fixed crossbar. Each of the four ends of the movable crossbar has a second groove. The upper ends of each of the four movable sliders have first grooves. Each of the four second grooves has a connecting rod rotatably connected to it. The ends of the four connecting rods furthest from the first grooves are rotatably connected to the corresponding second grooves.

[0006] Preferably, a vertical rod is fixedly connected to the upper center of the movable cross, and a lifting ring is fixedly connected to the upper end of the vertical rod.

[0007] Preferably, a lifting rope is fixedly connected to the lifting ring, and the end of the lifting rope away from the lifting ring is externally connected to the hoist.

[0008] Preferably, a limiting rod is fixedly connected between the inner walls of both ends of the plurality of through slots, and the limiting rod passes through and is slidably connected to the movable slider on the same side.

[0009] Preferably, all of the multiple card blocks are trapezoidal in design and are made of rubber.

[0010] Compared with the prior art, the advantages of this utility model are as follows: 1. Four circumferentially evenly spaced clamping plates are used in conjunction with trapezoidal rubber blocks. The trapezoidal blocks can increase the contact area and friction with the bushing surface. The rubber material can avoid damaging the bushing surface and achieve self-centering clamping. This effectively prevents the bushing from sliding or shaking during the lifting process. Before lifting, the device can be directly aligned with the transformer bushing and lowered. During lifting, the connecting rod structure can directly clamp the transformer bushing, making the operation more convenient. 2. Through the linkage transmission structure, when the moving cross is raised and lowered, the four moving sliders can be driven to move radially along the through slot, thereby adjusting the diameter of the clamping area enclosed by the clamping plate, adapting to transformer bushings of different diameters, without the need to replace the clamping parts, and the clamping is convenient and efficient. 3. The limit rod ensures smooth sliding of the moving slider. The hoist is lifted and lowered as a whole through the lifting rope and the lifting ring drive device. The clamping and lifting actions are linked, which simplifies the operation process and improves the installation efficiency. The overall structure is symmetrical and stable. During the lifting process, the sleeve is subjected to uniform force, which can avoid the sleeve falling off or the installation deviation caused by the imbalance of force, and reduce the construction safety risk. Attached Figure Description

[0011] Figure 1 This is a perspective view of a transformer bushing lifting device proposed in this utility model; Figure 2 This is a bottom perspective view of a transformer bushing lifting device proposed in this utility model; Figure 3 This is a cross-sectional view of a transformer bushing lifting device proposed in this utility model; Figure 4 This is a sectional perspective view of a transformer bushing lifting device proposed in this utility model; Figure 5 for Figure 3 Enlarged view of the structure at point A in the image; Figure 6 This is a schematic diagram of the structure of an existing transformer bushing.

[0012] In the diagram: 1 Fixed cross, 2 Moving cross, 3 Connecting rod, 4 Lifting ring, 5 Clamping plate, 6 Locking block, 7 First groove, 8 Lifting rope, 9 Vertical rod, 10 Through groove, 11 Limiting rod, 12 Moving slider, 13 Second groove. Detailed Implementation

[0013] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0014] Reference Figure 1-6 A transformer bushing lifting device includes a fixed crossbar 1 with four circumferentially spaced through slots 10 extending radially along the crossbar 1, with an included angle of 90° between adjacent slots 10. A movable slider 12 is slidably connected within each slot 10, and a clamping plate 5 is vertically fixed to the lower end of each of the four movable sliders 12. The four clamping plates 5 are arranged in a ring, collectively forming a bushing clamping area. Multiple equally spaced locking blocks 6 are fixedly connected to the inner sides of each of the four clamping plates 5. The locking blocks 6 are trapezoidal in design and made of rubber. Made of rubber, the multiple locking blocks 6 are spaced at the same distance, and cooperate with the existing transformer bushing structure's coils. The locking blocks 6 can be locked in front of two coils. A movable cross 2 is arranged parallel above the fixed cross 1. Each of the four ends of the movable cross 2 has a second groove 13. The upper end of each of the four movable sliders 12 has a first groove 7. Each second groove 13 is rotatably connected to a connecting rod 3 through a rotating shaft. The ends of the four connecting rods 3 away from the second groove 13 are respectively rotatably connected to the first groove 7 of the corresponding movable slider 12 through a rotating shaft, forming a symmetrical linkage transmission structure.

[0015] A vertical rod 9 is fixedly connected to the upper center of the movable cross 2. A lifting ring 4 is fixedly connected to the upper end of the vertical rod 9. The lifting ring 4 is a closed ring structure. A lifting rope 8 is fixedly connected to the lifting ring 4. The end of the lifting rope 8 away from the lifting ring 4 is connected to the hoist, and the hoist provides lifting power.

[0016] Limiting rods 11 are fixedly connected between the inner walls of both ends of multiple through grooves 10. The limiting rods 11 are arranged parallel to the through grooves 10, and the limiting rods 11 pass through the movable sliders 12 on the same side and are slidably connected to them. The limiting rods 11 limit the sliding direction of the movable sliders 12 to prevent the movable sliders 12 from deviating or tilting during the sliding process.

[0017] In use, this utility model employs a hoist to move the device directly above the bushing. The hoist then lowers the device, causing the clamping plates 5 to descend. When the lower inclined surface of the locking block 6 on the inner side of the clamping plate 5 contacts the upper end of the transformer bushing's coils, it pushes the four locking blocks 6 outwards, squeezing the four clamping plates 5 outwards until they descend to the appropriate position. The hoist then lifts the device, causing the lifting rope 8 to move upwards, pulling the lifting ring 4 and the vertical rod 9, which in turn pulls the moving cross 2 upwards. This causes the four connecting rods 3 to rotate, pulling the four moving sliders 12 towards the center, which in turn moves the four clamping plates 5 towards the center. Multiple locking blocks 6 are engaged between multiple coils of the transformer bushing. Continuing to pull the lifting rope, under the pulling force, the clamping plates clamp the transformer bushing, achieving rapid clamping. After lifting, the hoist moves the transformer bushing to the ground, where it can be removed.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A transformer bushing lifting device, comprising a fixed crossbar (1), characterized in that, The fixed cross (1) has four through slots (10) arranged circumferentially at equal intervals. Each of the through slots (10) is slidably connected to a movable slider (12). Each of the four movable sliders (12) is fixedly connected to a clamp (5) at its lower end. Each of the four clamps (5) is fixedly connected to a plurality of equally spaced locking blocks (6) on its inner side. A movable cross (2) is arranged above the fixed cross (1). Each of the four ends of the movable cross (2) is provided with a second groove (13). Each of the four movable sliders (12) is provided with a first groove (7) at its upper end. Each of the four second grooves (13) is rotatably connected to a connecting rod (3). Each of the four connecting rods (3) is rotatably connected to the corresponding second groove (13) at the end away from the first groove (7).

2. The transformer bushing lifting device according to claim 1, characterized in that, A vertical rod (9) is fixedly connected to the upper center of the movable cross (2), and a hanging ring (4) is fixedly connected to the upper end of the vertical rod (9).

3. The transformer bushing lifting device according to claim 2, characterized in that, A lifting rope (8) is fixedly connected to the lifting ring (4), and the end of the lifting rope (8) away from the lifting ring (4) is connected to the hoist.

4. A transformer bushing lifting device according to claim 3, characterized in that, Limiting rods (11) are fixedly connected between the inner walls of both ends of the multiple through grooves (10). The limiting rods (11) pass through the movable sliders (12) on the same side and are slidably connected to them.

5. A transformer bushing lifting device according to claim 4, characterized in that, All of the aforementioned card blocks (6) are trapezoidal in design and are made of rubber.

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