A transformer coil hanger
By designing a transformer coil lifting tool with a reverse threaded screw and friction pressure block, the problems of damage and low efficiency caused by traditional lifting methods are solved, achieving efficient and safe coil lifting and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU APP SCI ACAD CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional methods of lifting transformer coils are prone to damage and are inefficient, while wire rope binding and lifting are costly.
Design a transformer coil lifting tool that uses a screw with reverse threads and a friction block structure. The movement of the slider is adjusted by rotating the screw, which expands or contracts the friction block to accommodate coils of different inner diameters. It uses friction and squeezing action to firmly clamp the coils and avoid damage.
It improved hoisting efficiency, reduced the risk of damage to transformer coils, enhanced the versatility and ease of operation of the hoisting tools, and reduced production costs.
Smart Images
Figure CN224298719U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer coil assembly technology, and in particular to a transformer coil lifting tool. Background Technology
[0002] As a core component of power equipment, transformer coils often require hoisting operations during manufacturing and assembly. Traditional hoisting methods typically involve securing the coil's perimeter with wire ropes or rigid clamps before lifting. However, these hoisting tools are prone to uneven stress, which can damage the transformer coil.
[0003] Deformation can damage transformer coils, and the use of wire ropes for binding results in low lifting efficiency and high production costs. Therefore, there is an urgent need for a transformer coil lifting tool to solve these problems. Utility Model Content
[0004] To overcome the shortcomings of the prior art, this utility model provides a transformer coil lifting tool, which solves the technical problems of easy damage and low lifting efficiency of transformer coils during hoisting.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0006] A transformer coil lifting tool is used to lift and transport a transformer coil, wherein the transformer coil is cylindrical in shape and has a cavity inside, comprising:
[0007] A screw, wherein a limiting sleeve is provided on the screw, and the screw has threads with opposite directions of rotation on both sides of the limiting sleeve;
[0008] A pair of sliders, each of the sliders being threaded onto a screw, and a limiting sleeve located between the pair of sliders;
[0009] A set of friction blocks is provided on the outside of a pair of sliders. The set of friction blocks are evenly spaced along the circumference of the screw. A pair of connecting rods are provided between the friction blocks and the pair of sliders. The ends of the connecting rods near the sliders are respectively hinged to the pair of sliders, and the ends of the connecting rods away from the sliders are pivotally connected to the friction blocks through coaxial pins. When the screw is rotated, the pair of sliders move towards each other along the axial direction of the screw, so as to push the connecting rods to drive the friction blocks to expand radially along the screw.
[0010] Based on the above structure, the principle of the transformer coil lifting device is as follows: When it is necessary to lift the transformer coil, firstly, the lifting device is placed in the cavity, and the screw is rotated. Due to the reverse thread action, the sliders on both sides of the limiting sleeve move towards each other along the screw axis, pushing the connecting rod to tilt outward. The connecting rod drives the friction block to expand outward along the screw radially until the friction block is tightly attached to the inner wall of the transformer coil cavity. The friction and squeezing action between the friction block and the inner wall of the coil achieves a firm clamping of the coil. By connecting the lifting cable of the lifting equipment (not shown) to the lifting device, the lifting of the transformer coil is achieved; if it is necessary to separate the lifting device from the transformer coil... When disengaging, the screw is rotated in the opposite direction, and a pair of sliders move in opposite directions along the screw axis. The connecting rod retracts inward, and a set of friction blocks retracts radially inward under the pull of the connecting rod, separating from the inner wall of the transformer coil. The expansion amplitude of the set of friction blocks in the radial direction of the screw can be changed by rotating the screw, which is suitable for cylindrical transformer coils with different inner diameters, improving the versatility of the lifting tool. After rotating the screw to the appropriate position, it can maintain the clamping state. The operation is efficient and convenient, suitable for frequent lifting operations, and helps to improve work efficiency. The set of friction blocks clamps and fixes the transformer coil with friction force, avoiding damage to the surface of the transformer coil.
[0011] Furthermore, in one transformer coil lifting device of this application, the pressing surface of the friction block is provided with an arc-shaped surface, the curvature of which is adapted to the curvature of the inner wall of the cavity. As a preferred embodiment of this application, the arc-shaped surface design of the friction block in the transformer coil lifting device allows the friction block to fit tightly against the inner wall of the transformer coil, eliminating gaps. At the same time, the curved surface structure of the arc-shaped surface ensures that the clamping force is evenly distributed along the circumference and axial direction of the transformer coil, avoiding stress concentration and preventing damage to the transformer coil.
[0012] Furthermore, in one transformer coil lifting device of this application, the surface of the arc-shaped surface is covered with a rubber pad. As a preferred embodiment of this application, the rubber pad in this transformer coil lifting device increases the friction between the friction block and the transformer coil, preventing slippage of the transformer coil during lifting. Simultaneously, the rubber pad undergoes elastic deformation when pressing against the inner wall of the transformer coil, further filling the gap between the inner wall of the cavity and the friction block, thereby increasing friction.
[0013] Furthermore, in a transformer coil lifting device of this application, the limiting sleeve and the screw are integrally formed, and the outer diameter of the limiting sleeve is larger than the outer diameter of the threaded section of the screw. The limiting sleeve is used to limit the minimum distance between a pair of sliders. As a preferred embodiment of this application, in a transformer coil lifting device of this application, the limiting sleeve is used to prevent the screw from rotating excessively. When the slider abuts against the limiting sleeve, the screw cannot continue to rotate in the clamping direction, avoiding excessive clamping of the transformer coil and causing damage to the transformer coil.
[0014] Furthermore, a transformer coil lifting device according to this application further includes a lifting ring, which is disposed at the top of the screw and is used to thread a lifting rope. As a preferred embodiment of this application, the lifting ring in the transformer coil lifting device facilitates the transfer of the lifting load to the screw shaft to form axial tensile force, avoiding screw bending or uneven force on the slider caused by eccentric load.
[0015] Furthermore, in a transformer coil lifting device of this application, the bottom end of the screw is provided with a limiting part, which extends radially along the screw and is used to limit the axial travel of the nearest slider. As a preferred embodiment of this application, in a transformer coil lifting device, when the slider moves to its limit position towards the bottom end of the screw, the upper surface of the limiting part contacts the end face of the slider, preventing the slider from continuing to move away from the limiting sleeve and preventing the nearest slider from detaching from the screw.
[0016] Furthermore, in one transformer coil lifting device of this application, an operating handle is provided on the screw rod, and the operating handle is used to rotate the screw rod. As a preferred embodiment of this application, the operating handle of the transformer coil lifting device allows the operator to easily rotate the screw rod and precisely control the lifting device's movement.
[0017] Furthermore, in a transformer coil lifting tool of this application, a pair of connecting rods includes an upper rod and a lower rod, wherein the lower rod is provided with an adjusting component for adjusting the relative angle between the friction block and the lower rod. As a preferred embodiment of this application, the transformer coil lifting tool, by adjusting the relative angle between the friction block and the lower rod, allows the arc-shaped surface of the friction block to fit more closely against the inner wall of the transformer coil cavity, ensuring maximum contact area and thus improving friction and lifting stability. Moreover, when lifting transformer coils of different specifications, operators can quickly adjust the angle of the friction block according to actual needs without replacing components, improving the versatility and operational efficiency of the lifting tool.
[0018] As can be seen from the above technical solution, this utility model has the following beneficial effects:
[0019] The purpose of this utility model is to provide a transformer coil lifting tool. By setting a screw with reverse threads, a pair of sliders move towards or away from each other, causing the friction block to expand or contract, adapting to coils with different inner diameters. The friction block pressing surface is provided with an arc-shaped surface and a rubber pad to avoid damaging the coil and enhance friction. The limiting sleeve and limiting part restrict the slider stroke to prevent over-clamping and slider disengagement. The lifting ring, operating handle and adjustable connecting rod and other structures achieve efficient and stable lifting, improving the versatility and work efficiency of the lifting tool. Attached Figure Description
[0020] Figure 1This is a three-dimensional structural schematic diagram of a transformer coil lifting device according to an embodiment of this application;
[0021] Figure 2 This is a three-dimensional structural schematic diagram of a transformer coil lifting device in working state according to an embodiment of this application;
[0022] Figure 3 This is a cross-sectional view of a transformer coil lifting device according to an embodiment of this application.
[0023] In the diagram: 1-Transformer coil; 10-Cavity; 2-Screw; 21-Limit sleeve; 22-Limit part; 23-Operating handle; 231-Handle; 3-Slider; 4-Friction block; 41-Arc-shaped surface; 42-Rubber pad; 5-Connecting rod; 51-Upper rod; 52-Lower rod; 6-Lifting ring; 7-Adjusting component; 71-Mounting base; 72-Adjusting screw. Detailed Implementation
[0024] like Figure 1 , 2 As shown in Figure 3, a transformer coil lifting tool is used to lift a transformer coil 1. The transformer coil 1 is cylindrical in shape and has a cavity 10 inside, comprising:
[0025] Screw 2, the screw 2 is provided with a limiting sleeve 21, and the screw 2 is provided with threads of opposite directions on both sides of the limiting sleeve 21;
[0026] A pair of sliders 3 are threadedly fitted onto the screw 2, and the limiting sleeve 21 is located between the pair of sliders 3;
[0027] A set of friction blocks 4 is provided on the outside of a pair of sliders 3. The set of friction blocks 4 is evenly spaced along the circumference of the screw 2. A pair of connecting rods 5 are provided between the friction blocks 4 and the pair of sliders 3. The end of the pair of connecting rods 5 near the sliders 3 is respectively hinged to the pair of sliders 3, and the end of the pair of connecting rods 5 away from the sliders 3 is pivotally connected to the friction blocks 4 through a coaxial pin. When the screw 2 is rotated, the pair of sliders 3 move towards each other along the axial direction of the screw 2, so as to push the connecting rods 5 to drive the friction blocks 4 to expand radially along the screw 2.
[0028] Based on the above structure, the principle is as follows: When it is necessary to lift the transformer coil 1, firstly, place the lifting device in the cavity 10, rotate the screw 2, and the sliders 3 on both sides of the limiting sleeve 21 move towards each other along the axial direction of the screw 2 due to the reverse thread action, pushing the connecting rod 5 to tilt outward. The connecting rod 5 drives the friction block 4 to expand outward along the radial direction of the screw 2 until the friction block 4 is tightly attached to the inner wall of the cavity 10 of the transformer coil 1. The friction and squeezing action between the friction block 4 and the inner wall of the coil achieves a firm clamping of the coil. By connecting the lifting cable (not shown) of the lifting equipment to the lifting device, the lifting of the transformer coil 1 is achieved. When it is necessary to separate the lifting device from the transformer coil 1, reverse... Rotating screw 2 causes a pair of sliders 3 to move in opposite directions along the axial direction of screw 2. Connecting rod 5 retracts inward, and a set of friction blocks 4 retracts radially inward along screw 2 under the pull of connecting rod 5, separating from the inner wall of transformer coil 1. The expansion amplitude of the set of friction blocks 4 in the radial direction of screw 2 can be changed by rotating screw 2, making it suitable for cylindrical transformer coils 1 with different inner diameters, improving the versatility of the lifting tool. After rotating screw 2 to the appropriate position, it maintains a clamped state, making operation efficient and convenient, suitable for frequent lifting operations, and helping to improve work efficiency. The set of friction blocks 4 clamps and fixes the transformer coil 1 through friction, avoiding damage to the surface of the transformer coil 1. The number of friction blocks 4 in a set is 3.
[0029] In this embodiment, the pressing surface of the friction block 4 is provided with an arc-shaped surface 41, the curvature of which is adapted to the curvature of the inner wall of the cavity 10. The design of the arc-shaped surface 41 of the friction block 4 allows the friction block 4 to fit tightly against the inner wall of the transformer coil 1, eliminating gaps. At the same time, the curved structure of the arc-shaped surface 41 makes the clamping force evenly distributed along the circumference and axial direction of the transformer coil 1, avoiding stress concentration and damage to the transformer coil 1.
[0030] In this embodiment, the surface of the arc-shaped surface 41 is covered with a rubber pad 42. The rubber pad 42 is used to increase the friction between the friction block 4 and the transformer coil 1, preventing the transformer coil 1 from slipping during hoisting. Simultaneously, the rubber pad 42 undergoes elastic deformation when pressing against the inner wall of the transformer coil 1, further filling the gap between the inner wall of the cavity 10 and the friction block 4, thus increasing the friction. The rubber pad 42 is mounted on the friction block 4 using screws (not shown).
[0031] In this embodiment, the limiting sleeve 21 and the screw 2 are integrally formed. The outer diameter of the limiting sleeve 21 is larger than the outer diameter of the threaded section of the screw 2. The limiting sleeve 21 is used to limit the minimum distance between a pair of sliders 3. The limiting sleeve 21 is used to prevent the screw 2 from rotating excessively. When the slider 3 abuts against the limiting sleeve 21, the screw 2 cannot continue to rotate in the clamping direction, thus avoiding excessive clamping of the transformer coil 1 and damage to the transformer coil 1.
[0032] In this embodiment, a lifting ring 6 is also included. The lifting ring 6 is disposed at the top end of the screw 2 and is used to thread a lifting rope. The lifting ring 6 facilitates the transfer of the lifting load to the axis of the screw 2 to form an axial tensile force, avoiding bending of the screw 2 or uneven force on the slider 3 caused by eccentric load.
[0033] In this embodiment, a limiting part 22 is provided at the bottom end of the screw 2. The limiting part 22 extends radially along the screw 2 and is used to limit the axial travel of the nearest slider 3. When the slider 3 moves to its limit position towards the bottom end of the screw 2, the upper end face of the limiting part 22 contacts the end face of the slider 3, preventing the slider 3 from continuing to move away from the limiting sleeve 21 and preventing the nearest slider 3 from disengaging from the screw 2.
[0034] In this embodiment, the screw 2 is provided with an operating handle 23, which is used to rotate the screw 2. The operating handle 23 allows the operator to easily rotate the screw 2 and precisely control the movement of the lifting device. The operating handle 23 includes a pair of handles 231, which are provided on the screw 2, coaxially arranged, and extend radially along the screw 2.
[0035] In this embodiment, the pair of connecting rods 5 includes an upper rod 51 and a lower rod 52. The lower rod 52 is equipped with an adjusting component 7, which is used to adjust the relative angle between the friction block 4 and the lower rod 52. By adjusting the relative angle between the friction block 4 and the lower rod 52, the arc-shaped surface 41 of the friction block 4 can fit more tightly against the inner wall of the transformer coil 1 cavity 10, ensuring maximum contact area and thus improving friction and hoisting stability. Furthermore, when hoisting transformer coils 1 of different specifications, the operator can quickly adjust the angle of the friction block 4 according to actual needs without replacing components, improving the versatility and operational efficiency of the hoisting equipment. The adjusting component 7 includes a mounting base 71 and an adjusting screw 72. The mounting base 71 is located on the lower rod 52, and the adjusting screw 72 passes through the mounting base 71. The adjusting screw 72 is threaded into the mounting base 71, and its end faces the friction block 4.
[0036] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.
Claims
1. A transformer coil lifting tool for lifting a transformer coil (1), wherein the transformer coil (1) is cylindrical in shape and has a cavity (10) inside, characterized in that: include: The screw (2) is provided with a limiting sleeve (21), and the screw (2) has threads with opposite directions on both sides of the limiting sleeve (21); A pair of sliders (3), each of the sliders (3) is threaded onto the screw (2), and the limiting sleeve (21) is located between the pair of sliders (3); A set of friction blocks (4) are provided on the outside of a pair of sliders (3). The set of friction blocks (4) are evenly spaced along the circumference of the screw (2). A pair of connecting rods (5) are provided between the friction blocks (4) and the pair of sliders (3). The end of the pair of connecting rods (5) near the sliders (3) is hinged to the pair of sliders (3) respectively. The end of the pair of connecting rods (5) away from the sliders (3) is pivotally connected to the friction blocks (4) through a coaxial pin. When the screw (2) is rotated, the pair of sliders (3) move towards each other along the axial direction of the screw (2) to push the connecting rods (5) to drive the friction blocks (4) to expand radially along the screw (2). The pair of connecting rods (5) includes an upper rod (51) and a lower rod (52), wherein the lower rod (52) is provided with an adjusting component (7), which is used to adjust the relative angle between the friction block (4) and the lower rod (52).
2. The transformer coil lifting tool according to claim 1, characterized in that: The friction block (4) has an arc-shaped surface (41) on its pressing surface, and the curvature of the arc-shaped surface (41) is adapted to the curvature of the inner wall of the cavity (10).
3. A transformer coil lifting tool according to claim 2, characterized in that: The surface of the arc-shaped surface (41) is covered with a rubber pad (42).
4. A transformer coil lifting tool according to claim 1, characterized in that: The limiting sleeve (21) and the screw (2) are integrally formed. The outer diameter of the limiting sleeve (21) is larger than the outer diameter of the threaded section of the screw (2). The limiting sleeve (21) is used to limit the minimum distance between a pair of sliders (3).
5. A transformer coil lifting tool according to claim 1, characterized in that: Also includes: The lifting ring (6) is located at the top of the screw (2) and is used to thread the lifting rope.
6. A transformer coil lifting tool according to claim 1, characterized in that: The bottom end of the screw (2) is provided with a limiting part (22), which extends radially along the screw (2) and is used to limit the axial travel of the nearest side slider (3).
7. A transformer coil lifting tool according to claim 1, characterized in that: The screw (2) is provided with an operating handle (23), which is used to rotate the screw (2).