A transformer bushing assembly and disassembly lead support frame

Abstract

This utility model relates to a transformer bushing lead wire support frame, which effectively solves the problem of keeping the lead wire straight and maintaining the same tilt angle as the bushing during bushing hoisting. It includes a top plate, a bottom plate, and support rods. The top plate and bottom plate are connected and fixed together by the support rods to form the support frame. A vertically downward pulley bracket is installed on the lower surface of the top plate. A pulley is mounted on the pulley bracket via a pulley axle, and a traction rope is wound around the pulley, forming the traction structure for the transformer bushing. The structure is simple, novel, and unique, and easy to install and use. It can be effectively used for transformer overhauls, installations, and high-voltage bushing replacements, ensuring that the lead wire is straight and maintains the same tilt angle as the bushing during hoisting, saving materials, improving work efficiency, and providing good social and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of transformer installation equipment, and in particular to a transformer bushing disassembly and assembly lead wire support frame. Background Technology

[0002] Transformers are essential equipment in power transmission. Therefore, ensuring the safe and practical operation of transformers requires major overhauls, installations, and high-voltage bushing replacements. However, in past transformer overhauls, installations, and high-voltage bushing replacements, to ensure the leads inside the bushings do not twist or experience excessive external force during installation, a safety platform above the transformer was required. A designated person would pull ropes upwards from this platform to guide the leads, ensuring no twisting occurred during the entire bushing hoisting process. If the required safety platform was unavailable at the transformer overhaul or installation site, it had to be erected on-site for bushing installation. Furthermore, since bushings are not vertical and have an angle, even with the installer on the safety platform, the angle at which the lead was pulled could not perfectly match the bushing installation angle, posing significant difficulties for hoisting. To prevent lead twisting, the rope had to be continuously pulled upwards, guiding the lead through the center of the high-voltage bushing's porcelain sleeve and pulling it out at the bushing's cap before securing the terminals. This not only wasted materials but also delayed the bushing installation work.

[0003] Through in-depth research and analysis of the sleeve installation process, it was found that the difficulty in installing the lead wire lies in solving the problem of keeping the lead wire straight and maintaining the same tilt angle as the sleeve during sleeve hoisting. Therefore, the question arises: how to develop a device that changes the direction of the lead wire's traction force? When in use, this special tool is fixed to the sleeve to be installed, the rope pulling the lead wire passes through a pulley, and the lead wire inside the sleeve is reliably connected to the rope with a special bolt. During the sleeve hoisting process, only one worker needs to be on-site to tighten the rope, ensuring that the angle of the pull wire is exactly the same as the sleeve installation angle, maintaining the same tilt angle as the sleeve, saving materials and improving work efficiency. However, no public reports have been seen to date on this technology. Utility Model Content

[0004] In view of the above situation and to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a transformer bushing disassembly and assembly lead wire support frame, which can effectively solve the problem of straightening the lead wire and maintaining the same tilt angle as the bushing during the bushing hoisting process.

[0005] The technical solution provided by this invention is a transformer bushing lead wire support frame, comprising a top plate, a bottom plate, and a support rod. The top plate and the bottom plate are connected and fixed together by the support rod to form a support frame body. A vertically downward pulley bracket is mounted on the lower surface of the top plate. A pulley is mounted on the pulley bracket via a pulley axle, and a traction rope is wound around the pulley to form a traction structure for the transformer bushing. The bottom plate comprises a bottom plate body with a through hole in the center and four lower fixing holes corresponding to the upper fixing holes evenly distributed around its perimeter. Four fixing grooves are evenly distributed around the perimeter of the side wall. The pulley bracket comprises a bracket body in the shape of a U-shaped groove, and a pulley axle fixing hole is formed on the side wall of the U-shaped groove.

[0006] This utility model has a simple, novel, and unique structure, and is easy to install and use. It can be effectively used for transformer overhaul, installation, and high-voltage bushing replacement, ensuring that the lead wire is straightened and maintains the same tilt angle as the bushing during the bushing hoisting process, saving materials, improving work efficiency, and having good social and economic benefits. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0008] Figure 2 This is a structural diagram of the top plate of this utility model;

[0009] Figure 3 This is a structural diagram of the base plate of this utility model;

[0010] Figure 4 This is a structural diagram of the support rod of this utility model;

[0011] Figure 5 This is a front view of the pulley bracket of this utility model;

[0012] Figure 6 This is a side view of the pulley bracket of this utility model;

[0013] Figure 7 This is a front view of the pulley of this utility model;

[0014] Figure 8 This is a side view of the pulley of this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings and specific circumstances.

[0016] Depend on Figure 1-8This utility model discloses a transformer bushing lead wire support frame, comprising a top plate 1, a bottom plate 2, and a support rod 3. The top plate 1 and the bottom plate 2 are connected and fixed together by the support rod 3 to form a support frame. A vertically downward pulley bracket 5 is mounted on the lower surface of the top plate 1. A pulley 4 is mounted on the pulley bracket 5 via a pulley shaft 6, and a traction rope 7 is wound around the pulley 4 to form a traction structure for the transformer bushing. The bottom plate 2 includes a bottom plate body 2-1, with a through hole 2-2 in the center of the bottom plate body 2-1, four lower fixing holes 2-3 evenly distributed around the perimeter corresponding to the upper fixing holes 1-2, and four fixing grooves 2-4 evenly distributed around the perimeter of the side wall. The pulley bracket 5 includes a bracket body 5-1, which is U-shaped groove 5-3, with pulley shaft fixing holes 5-2 on the side wall of the U-shaped groove 5-3.

[0017] The top plate 1 includes a top plate body 1-1, and four upper fixing holes 1-2 are evenly distributed around the perimeter of the top plate body 1-1.

[0018] The support rod 3 is a columnar support rod body 3-1. The two ends of the support rod body 3-1 are provided with mounting heads 3-2. Each of the upper and lower fixing holes is equipped with a support rod 3, which fixes the top plate 1 and the bottom plate 2 together.

[0019] The pulley 4 includes a pulley body 4-1, with a shaft hole 4-2 for mounting the pulley shaft 6 at the center of the pulley body 4-1, and the periphery of the pulley body 4-1 is formed into an arc-shaped groove.

[0020] In use of this utility model, during the installation or disassembly of the transformer bushing, first remove the terminal block at the head of the transformer bushing, remove the conductive sealing head, install the perforated screw (known technology, commercially available product) on the lead wire connector inside the transformer bushing, then align the support frame of this utility model through the through hole 2-2 with the lead wire connector inside the transformer bushing and place it on the sealing pressure plate of the bushing, and fix it with bolts through the fixing groove 2-4 through the base plate and install it on the sealing pressure plate of the bushing. Then, firmly connect the fixed end of the traction rope 7 to the perforated screw, and use a hoist to lift the transformer bushing. The traction end of the 7-pin cable is tightened by one installer. During the hoisting process, regardless of the tilt angle, the lead wire and rope from the pulley to the stress cone section of the lead wire always maintain the same tilt angle with the casing. At the same time, the bearing also changes the direction of the traction force. Only one installer needs to keep the rope taut to cooperate with the crane operator to correctly install the high-voltage lead wire without the need to build a safety platform. This not only greatly reduces the construction difficulty, reduces the number of workers, and promotes the construction progress, but also improves the safety of lead wire installation during casing hoisting, resulting in good social and economic benefits.

Claims

1. A transformer bushing lead dismounting support frame comprising a top plate (1), a bottom plate (2) and support bars (3), characterized in that, The top plate (1) and bottom plate (2) are connected and fixed together by a support rod (3) to form a support frame. The lower surface of the top plate (1) is equipped with a vertically downward pulley bracket (5). A pulley (4) is mounted on the pulley bracket (5) via a pulley shaft (6). A traction rope (7) is wound around the pulley (4) to form the traction structure of the transformer bushing. The base plate (2) includes a base plate body (2-1), a through hole (2-2) in the center of the base plate body (2-1), four lower fixing holes (2-3) corresponding to the upper fixing holes (1-2) are evenly distributed around the perimeter, and four fixing grooves (2-4) are evenly distributed around the side wall. The pulley bracket (5) includes a bracket body (5-1), the bracket body (5-1) is in the shape of a U-shaped groove (5-3), and a pulley shaft fixing hole (5-2) is opened on the side wall of the U-shaped groove (5-3).

2. The transformer bushing lead removal support frame of claim 1, wherein, The top plate (1) includes a top plate body (1-1), and four upper fixing holes (1-2) are evenly distributed around the periphery of the top plate body (1-1).

3. The transformer bushing disassembly and assembly lead support frame according to claim 1, characterized in that, The support rod (3) is a columnar support rod body (3-1). The two ends of the support rod body (3-1) are provided with mounting heads (3-2). Each of the upper and lower fixing holes is equipped with a support rod (3) to fix the top plate (1) and the bottom plate (2) together.

4. The transformer bushing disassembly and assembly lead support frame according to claim 1, characterized in that, The pulley (4) includes a pulley body (4-1), the center of which has a shaft hole (4-2) for mounting the pulley shaft (6), and the periphery of the pulley body (4-1) is formed into an arc groove.

Images