Small angle ring structure for coils at head end and tail end of low-voltage coil of transformer
By designing an insulating cylinder and an insulating end support ring at the first end of the low-voltage coil of the transformer, extending the insulation distance and abolishing the small-angle ring body, the problems of high cost of traditional structures and electromagnetic field discharge are solved, and the effect of reducing manufacturing costs and improving production efficiency is achieved.
Patent Information
- Application Number
- CN202420287139.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-06
AI Technical Summary
The production cost of the small angle ring structure at the first end of the low-voltage coil of traditional transformers is high, which increases the production cost of the transformer and has an impact on the local discharge of the electromagnetic field, affecting safe operation and cost.
A small angle ring structure of the first end coil of the transformer low-voltage coil is designed. By adding the mounting plate and the insulating end support ring outside the insulating cylinder, the creepage distance of the steel structure parts to the ground is extended, and the small angle ring body of the coil is cancelled to reduce costs. .
The design improvement of the axial exit-to-ground insulation structure of the transformer is achieved, which directly saves manufacturing costs, reduces processing costs, improves production efficiency, and reduces installation time.
Smart Images
Figure CN222530196U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a field, in particular to an improved design of a small-angle ring structure of the first and last coils of a transformer low-voltage coil. Background Art
[0002] With the increasingly fierce competition in the transformer product market, the performance level of the product plays a key role to a large extent. How to reduce the design cost of the product while ensuring the product performance level; with the continuous improvement of the transformer voltage level and the increase of product capacity, the requirements for the partial discharge of the electromagnetic field are getting higher and higher. It is important to effectively reduce the partial discharge of the electromagnetic field at the beginning and end of the low-voltage coil to the steel structure, which directly affects the safe operation and the manufacturing cost of the transformer.
[0003] In the traditional structure, a group of small-angle rings of the formed coil are generally installed in the circumferential direction at the beginning and end of the coil when the coil is wound. Since the production cost of the small-angle rings of the formed coils is relatively high, the production cost of the transformer is greatly increased. Therefore, the utility model proposes an improved design of the small-angle ring structure of the transformer low-voltage coil at the beginning and end, which reduces the manufacturing cost and is convenient for operation. Utility Model Content
[0004] The utility model aims to provide a transformer low-voltage coil head and end coil small angle ring structure to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small-angle ring structure for the head and end coils of a transformer low-voltage coil, comprising a steel structure, a coil body, an insulating cylinder and an insulating end support ring, an insulating cylinder being provided on the lower side of the steel structure, the size of the insulating cylinder being matched with the size of the steel structure, a plurality of mounting plates being provided on the outer side of the insulating cylinder, an insulating end support ring being provided at the position where the ends of the plurality of mounting plates are connected to the insulating cylinder, the size of the insulating end support ring being matched with the size of the insulating cylinder.
[0006] Preferably, a coil body is provided between the plurality of mounting plates, and the size of the coil body is adapted to the size of the mounting plate.
[0007] Preferably, a coil small-angle ring structural body is provided at a position of the end of the coil body corresponding to the insulating end support ring, and the size of the coil small-angle ring body is adapted to the size of the coil body.
[0008] Preferably, the size of the coil small-angle ring body is smaller than the size of the insulating end support ring, and the coil small-angle ring body is tightly connected to the insulating sleeve.
[0009] Compared with the prior art, the beneficial effects of the utility model are: the design of the axial insulation structure of the high-voltage coil of the transformer to the ground is improved, which directly saves the manufacturing cost of a transformer. The new structural design can not only meet the original design requirements, but also greatly reduce the processing cost, improve production efficiency, and further reduce the time spent by workers in installing the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the placement structure of the small angle ring at the front and end of the improved front coil of the utility model;
[0011] Figure 2 This is a schematic diagram of the structure of the improved utility model in which the small angle rings of the coils at the first and end of the coils are eliminated;
[0012] Figure 3 for Figure 1 The middle part of the structure is enlarged schematic diagram;
[0013] Figure 4 for Figure 2 Enlarged schematic diagram of the middle part of the structure.
[0014] In the figure: 1. Steel structure; 2. Coil body; 3. Coil small angle ring body; 4. Insulating cylinder; 5. Insulating end support ring. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0017] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0018] See also Figure 1-4 The utility model provides a technical solution: a small-angle ring structure of the head and end coils of a transformer low-voltage coil, comprising a steel structure 1, a coil body 2, an insulating cylinder 4 and an insulating end support ring 5. An insulating cylinder 4 is provided on the lower side of the steel structure 1, and the size of the insulating cylinder 4 is adapted to the size of the steel structure 1. A plurality of mounting plates are provided on the outer side of the insulating cylinder 4, and an insulating end support ring 5 is provided at the position where the ends of the plurality of mounting plates are connected to the insulating cylinder 4, and the size of the insulating end support ring 5 is adapted to the size of the insulating cylinder 4.
[0019] In this embodiment, a coil body 2 is provided between the plurality of mounting plates, and the size of the coil body 2 is adapted to the size of the mounting plates.
[0020] In this embodiment, a coil small-angle ring structure body is provided at the end of the coil body 2 at a position corresponding to the insulating end support ring 5 , and the size of the coil small-angle ring body 3 is adapted to the size of the coil body 2 .
[0021] In this embodiment, the size of the coil small-angle ring body 3 is smaller than the size of the insulating end support ring 5 , and the coil small-angle ring body 3 is tightly connected to the insulating sheath 4 .
[0022] In this embodiment, in order to reduce the manufacturing cost of the transformer, the structural design between the coil body 2 and the adjacent components is improved. By adding an end insulating support ring and increasing the height of the insulating tube 4, the creepage distance of the steel structure 1 to the ground is extended to meet L≥220mm, thereby meeting the safe operation requirements of the transformer.
[0023] In this embodiment, advanced electromagnetic software is fully utilized to analyze the electromagnetic field at the end of the coil body 2 to determine the electromagnetic field creepage trajectory there.
[0024] In this embodiment, it is determined through electromagnetic design that an insulating end support ring 5 with a height of 30 mm and a length of 50 mm needs to be added to the end of the coil body 2 so as to extend the creepage distance of the end of the coil body 2 and the steel structure 1 to the ground. Through this item, the creepage distance reaches 130 mm.
[0025] In this embodiment, if the height of the insulating end support ring 5 is increased indefinitely, the height of the steel structure No. 1 will inevitably increase, which is not economical. Therefore, through electromagnetic design, it is determined that when the height of the insulating tube 4 before the improvement is increased by 100mm, the creepage distance of the steel structure 1 to the ground insulation can be extended, which is more economical.
[0026] In this embodiment, based on the above-mentioned improvement basis, the design and installation of the small-angle coil ring body 3 in the product can be completely eliminated, thus avoiding external purchase and reducing the production cost.
[0027] In this embodiment, the improved insulating end support ring 5 only needs a 30mm thick, 50mm long, and 50mm wide square insulating pad, 20 pieces per set, which requires 4 kilograms. According to the density of the insulating cardboard 1.2g / cm³ and the market price of the insulating cardboard, the production cost of each set is about 50 yuan.
[0028] Working principle: The improvement of the insulation structure design of the axial outlet of the high-voltage coil of the transformer directly saves the manufacturing cost of a transformer. The new structural design can not only meet the original design requirements, but also greatly reduce the processing cost, improve production efficiency, and further reduce the time spent by the staff in installing the overall structure.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A transformer low-voltage coil head and end coil small angle ring structure, characterized in that: The invention comprises a steel structure (1), a coil body (2), an insulating sleeve (4) and an insulating end support ring (5), wherein the insulating sleeve (4) is provided on the lower side of the steel structure (1), the size of the insulating sleeve (4) matches the size of the steel structure (1), a plurality of mounting plates are provided on the outer side of the insulating sleeve (4), and an insulating end support ring (5) is provided at the position where the ends of the plurality of mounting plates are connected to the insulating sleeve (4), and the size of the insulating end support ring (5) matches the size of the insulating sleeve (4).
2. The transformer low-voltage coil head and end coil small angle ring structure according to claim 1, characterized in that: A coil body (2) is provided between the plurality of mounting plates, and the size of the coil body (2) is adapted to the size of the mounting plates.
3. The transformer low-voltage coil head and end coil small angle ring structure according to claim 1, characterized in that: A coil small-angle ring body is provided at a position of the end of the coil body (2) corresponding to the insulating end support ring (5), and the size of the coil small-angle ring body (3) is compatible with the size of the coil body (2).
4. The transformer low-voltage coil head and end coil small angle ring structure according to claim 3, characterized in that: The size of the coil small-angle ring body (3) is smaller than the size of the insulating end support ring (5), and the coil small-angle ring body (3) is tightly connected to the insulating surrounding tube (4).