Angle ring assembly and transformer
By using a multi-layer insulating sleeve made of insulating cardboard winding, the upper corner ring and the lower corner ring are arranged interlaced to form the upper corner ring and the lower corner ring, the problem of high production cost of corner ring components in the prior art is solved, and the increase of the creepage distance of the transformer coil and the improvement of electrical safety performance are achieved.
Patent Information
- Application Number
- CN202421296570.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-05
AI Technical Summary
In the prior art, the manufacturing cost of the corner ring assembly is too high and the production takes a long time, making it difficult to meet the increased demand for transformer coil creepage distance.
A multi-layer insulating sleeve made of insulating cardboard winding is formed by interlacing the first and second insulating sleeves to form an upper corner ring and a lower corner ring, which are respectively arranged on the upper and lower coils of the high-voltage coil.
It effectively increases the creepage distance of the coil, improves electrical safety performance, reduces production costs, and simplifies structural design.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of angle ring components, in particular to an angle ring component and a transformer. Background Art
[0002] Oil-immersed transformers are widely used for their simple structure and reliable operation. However, the working field strength of the transformer is very high during operation, which will cause partial discharge and damage the transformer. Therefore, it is extremely important to increase the creepage distance of the transformer coil. Generally, an angle ring is installed on the coil to increase the distance from the iron yoke insulation to the coil end face, thereby increasing the creepage distance.
[0003] However, in the prior art, the angle rings are usually made by wet forming. The angle ring assembly made by this manufacturing method is time-consuming and has a high manufacturing cost.
[0004] Therefore, it is necessary to provide a new angle ring assembly and transformer to solve the above technical problems. Utility Model Content
[0005] The main purpose of the utility model is to provide an angle ring assembly and a transformer, aiming to improve the technical problem of excessively high manufacturing cost of the angle ring assembly in the prior art.
[0006] In order to achieve the above-mentioned purpose, the utility model proposes an angle ring assembly, which is used to be sleeved on a high-voltage coil, and the high-voltage coil is divided into an upper coil and a lower coil arranged in a vertical direction. The angle ring assembly includes:
[0007] An upper angle ring, the upper angle ring is used to be sleeved on the upper coil, the upper angle ring includes at least four layers of first insulating sleeves, the first insulating sleeves are wound by insulating paperboard, and both ends of each first insulating sleeve are formed with a plurality of first convex plates arranged in a circle around the central axis of the first insulating sleeve, and a first groove is formed between two adjacent first convex plates. The four layers of the first insulating sleeves are sequentially fitted from the inside to the outside, and the first convex plates on adjacent first insulating sleeves are staggered to cover the plurality of first grooves;
[0008] A lower angle ring, which is used to be sleeved on the lower coil, and includes at least four layers of second insulating sleeves, the second insulating sleeves are formed by winding insulating cardboard, and each of the second insulating sleeves is formed with a plurality of second convex plates arranged in a circle around the central axis of the second insulating sleeve at one end away from the first insulating sleeve, the second convex plates extend outward, and a second groove is formed between two adjacent second convex plates, the four layers of the second insulating sleeves are sequentially fitted from the inside to the outside, and the second convex plates on adjacent second insulating sleeves are staggered to cover the plurality of second grooves.
[0009] In one embodiment, a center line of the first groove of the outer first insulating sleeve of two adjacent first insulating sleeves is aligned with an edge line of the first convex plate of the inner first insulating sleeve.
[0010] In one embodiment, a center line of the second groove of the outer second insulating sleeve of two adjacent second insulating sleeves is aligned with an edge line of the second convex plate of the inner second insulating sleeve.
[0011] In one embodiment, both ends of the upper angle ring extend out of both ends of the upper coil; and both ends of the lower angle ring extend out of both ends of the lower coil.
[0012] In one embodiment, the first insulating sleeve and the second insulating sleeve have the same size.
[0013] In one embodiment, the thickness of the first insulating sleeve and the second insulating sleeve are both 0.4 mm to 0.6 mm.
[0014] In one embodiment, the width of the first protruding plate and the second protruding plate are both 44 mm to 46 mm.
[0015] In one embodiment, the width of the first groove is the distance between the upper angle ring and the upper coil plus 5 mm to 7 mm.
[0016] In one embodiment, the width of the second groove is the distance between the lower corner ring and the lower coil plus 5 mm to 7 mm.
[0017] The utility model also proposes a transformer, including a high-voltage coil and the above-mentioned angle ring assembly, the high-voltage coil includes an upper coil and a lower coil arranged in a vertical direction, the upper angle ring is sleeved on the upper coil, and the lower angle ring is sleeved on the lower coil.
[0018] In the above scheme, the angle ring assembly is used to be sleeved on the high-voltage coil, and the high-voltage coil is divided into an upper coil and a lower coil arranged in the vertical direction. The angle ring assembly includes an upper angle ring and a lower angle ring; the upper angle ring is used to be sleeved on the upper coil, and the upper angle ring includes at least four layers of first insulating sleeves, and the first insulating sleeves are wound by insulating paperboard. Both ends of each first insulating sleeve are formed with a plurality of first convex plates arranged in a circle around the central axis of the first insulating sleeve, and a first groove is formed between two adjacent first convex plates. The four layers of first insulating sleeves are sequentially fitted from the inside to the outside, and the adjacent first insulating sleeves are The first convex plates are staggered to cover the multiple first grooves; the lower angle ring is used to be sleeved on the lower coil, the lower angle ring includes at least four layers of second insulating sleeves, the second insulating sleeves are wound by insulating cardboard, and each second insulating sleeve is formed with a plurality of second convex plates arranged in a circle around the central axis of the second insulating sleeve at one end away from the first insulating sleeve, the second convex plates extend outward, and a second groove is formed between two adjacent second convex plates. The four layers of second insulating sleeves are sequentially fitted from the inside to the outside, and the second convex plates on adjacent second insulating sleeves are staggered to cover the multiple second grooves. The high-voltage coil is divided into an upper coil and a lower coil, and an upper angle ring and a lower angle ring are respectively sleeved on the upper coil and the lower coil of the high-voltage coil. Since the upper angle ring is formed by a plurality of first insulating sleeves sequentially sleeved from the inside to the outside, it is equivalent to increasing the distance from the iron yoke insulation to the coil end face of the upper coil, thereby effectively increasing the coil creepage distance, and greatly improving the electrical safety performance; since the lower angle ring is formed by a plurality of second insulating sleeves sequentially sleeved from the inside to the outside, it is equivalent to increasing the distance from the iron yoke insulation to the coil end face of the lower coil, thereby effectively increasing the coil creepage distance, and greatly improving the electrical safety performance. Specifically, the first insulating sleeve is wound by insulating paperboard, and first grooves arranged at intervals are processed at both ends of the insulating paperboard to form a plurality of first convex plates arranged at intervals, and then the plurality of first insulating sleeves wound are staggered to cover all the first grooves by the first convex plates; the second insulating sleeve is also wound by insulating paperboard, and second grooves arranged at intervals are processed at one end of the insulating paperboard to form a plurality of second convex plates arranged at intervals, and then the plurality of second insulating sleeves wound are staggered to cover all the second grooves by the second convex plates; the utility model adopts insulating paperboard to make the first insulating sleeve and the second insulating sleeve, which can greatly reduce the production cost, and both ends of the first insulating sleeve and one end of the second insulating sleeve are cut, which can not only meet the effect of increasing the creepage distance of the coil, but also can stagger the multi-layer structure, which is more conducive to flexible adjustment of the structure of the upper angle ring and the lower angle ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 A schematic diagram of the overall structure of an embodiment of a first insulating sleeve provided by the utility model;
[0021] Figure 2 A schematic diagram of the internal structure of an embodiment of a second insulating sleeve provided by the utility model;
[0022] Figure 3 A top view of an embodiment of an upper angle ring provided by the utility model;
[0023] Figure 4 A bottom view of an embodiment of a lower corner ring provided by the utility model;
[0024] Figure 5 A structural schematic diagram of an embodiment of an insulating paperboard provided by the utility model;
[0025] Figure 6 A structural schematic diagram of another embodiment of the insulating paperboard provided by the utility model;
[0026] Figure 7 A cross-sectional view of an embodiment of an upper angle ring provided by the utility model;
[0027] Figure 8 A cross-sectional view of an embodiment of a lower angle ring provided by the utility model.
[0028] Description of Figure Numbers:
[0029] 1. Upper angle ring; 2. Lower angle ring; 11. First insulating sleeve; 12. First convex plate; 13. First groove; 21. Second insulating sleeve; 22. Second convex plate; 23. Second groove.
[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0031] 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 of 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.
[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0034] See also Figures 1 to 8The utility model proposes an angle ring assembly, which is used to be sleeved on a high-voltage coil. The high-voltage coil is divided into an upper coil and a lower coil arranged in a vertical direction. The angle ring assembly includes an upper angle ring 1 and a lower angle ring 2; the upper angle ring 1 is used to be sleeved on the upper coil, and the upper angle ring 1 includes at least four layers of first insulating sleeves 11, and the first insulating sleeves 11 are wound by insulating paperboard. Both ends of each first insulating sleeve 11 are formed with a plurality of first convex plates 12 arranged in a circle around the central axis of the first insulating sleeve 11, and a first groove 13 is formed between two adjacent first convex plates 12. The four layers of first insulating sleeves 11 are sequentially fitted from the inside to the outside, and adjacent first insulating sleeves 1 1, the first convex plates 12 on the lower corner ring 2 are staggered to cover the multiple first grooves 13; the lower corner ring 2 is used to be sleeved on the lower coil, and the lower corner ring 2 includes at least four layers of second insulating sleeves 21, the second insulating sleeves 21 are wound by insulating paperboard, and one end of each second insulating sleeve 21 away from the first insulating sleeve 11 is formed with multiple second convex plates 22 arranged in a circle around the central axis of the second insulating sleeve 21, the second convex plates 22 extend outward, and a second groove 23 is formed between two adjacent second convex plates 22, the four layers of second insulating sleeves 21 are sequentially fitted from the inside to the outside, and the second convex plates 22 on adjacent second insulating sleeves 21 are staggered to cover the multiple second grooves 23. The high-voltage coil is divided into an upper coil and a lower coil, and an upper angle ring 1 and a lower angle ring 2 are respectively sleeved on the upper coil and the lower coil of the high-voltage coil. Since the upper angle ring 1 is formed by a plurality of first insulating sleeves 11 sequentially sleeved from the inside to the outside, it is equivalent to increasing the distance from the iron yoke insulation to the coil end face of the upper coil, thereby effectively increasing the coil creepage distance, and greatly improving the electrical safety performance; since the lower angle ring 2 is formed by a plurality of second insulating sleeves 21 sequentially sleeved from the inside to the outside, it is equivalent to increasing the distance from the iron yoke insulation to the coil end face of the lower coil, thereby effectively increasing the coil creepage distance, and greatly improving the electrical safety performance.Specifically, the first insulating sleeve 11 is wound by insulating paperboard, and first grooves 13 arranged at intervals are processed at both ends of the insulating paperboard to form a plurality of first convex plates 12 arranged at intervals, and then all the first convex plates 12 are bent so that the first convex plates 12 extend outward, and the plurality of wound first insulating sleeves 11 are staggered, and the first convex plates 12 on the four layers of first insulating sleeves 11 are staggered with each other to cover all the first grooves 13; the second insulating sleeve 21 is also wound by insulating paperboard, and second grooves 23 arranged at intervals are processed at one end of the insulating paperboard to form a plurality of second convex plates 22 arranged at intervals, and then all the first convex plates 22 are staggered. The second convex plates 22 are bent so that the second convex plates 22 extend outward, and the multiple second insulating sleeves 21 that are wound are staggered, and the second convex plates 22 on the four layers of second insulating sleeves 21 are staggered to cover all the second grooves 23; in this embodiment, the first insulating sleeve 11 and the second insulating sleeve 21 are made of insulating paperboard, which can greatly reduce the manufacturing cost, and both ends of the first insulating sleeve 11 and one end of the second insulating sleeve 21 are cut, which not only can meet the effect of increasing the creepage distance of the coil, but also can stagger the multi-layer structure, which is more conducive to flexible adjustment of the structure of the upper angle ring 1 and the lower angle ring 2.
[0035] See also Figure 3 In one embodiment, the center line of the first groove 13 of the outer first insulating sleeve 11 of two adjacent first insulating sleeves 11 is aligned with the edge line of the first convex plate 12 of the inner first insulating sleeve 11. Specifically, the insulating paperboard is rolled to form the first insulating sleeve 11, and then the first convex plate 12 of the first insulating sleeve 11 is bent, so that the first convex plate 12 will extend outward, and then multiple first insulating sleeves 11 are staggered, and the center line of the first groove 13 of the outer first insulating sleeve 11 of the two adjacent first insulating sleeves 11 is aligned with the edge line of the first convex plate 12 of the inner first insulating sleeve 11, so that the multiple first insulating sleeves 11 are rotated in turn according to the above, so that the first convex plates 12 of the multiple first insulating sleeves 11 cover the first groove 13; through such a setting, the first insulating sleeve 11 can be rotated according to different usage conditions, which is conducive to flexible adjustment of the structure of the upper angle ring 1, and is convenient for the use of the upper angle ring 1, and the multiple first insulating sleeves 11 are staggered, which can effectively avoid the phenomenon of oil gap blockage and ensure the overall performance.
[0036] See also Figure 4In one embodiment, the center line of the second groove 23 of the outer second insulating sleeve 21 in two adjacent second insulating sleeves 21 is aligned with the edge line of the second convex plate 22 of the inner second insulating sleeve 21. Specifically, the insulating paperboard is rolled to form the second insulating sleeve 21, and then the second convex plate 22 of the second insulating sleeve 21 is bent so that the second convex plate 22 will extend outward, and then multiple second insulating sleeves 21 are staggered, and the center line of the second groove 23 of the outer second insulating sleeve 21 in two adjacent second insulating sleeves 21 is aligned with the edge line of the second convex plate 22 of the inner second insulating sleeve 21, so that the multiple second insulating sleeves 21 are rotated in turn according to the above, so that the second convex plates 22 of the multiple second insulating sleeves 21 cover the second groove 23; through such a setting, the second insulating sleeve 21 can be rotated according to different usage conditions, which is conducive to flexible adjustment of the structure of the lower angle ring 2, and is convenient for the use of the lower angle ring 2, and the multiple second insulating sleeves 21 are staggered, which can effectively avoid the phenomenon of oil gap blockage and ensure the overall performance.
[0037] In one embodiment, both ends of the upper angle ring 1 extend out of both ends of the upper coil; and both ends of the lower angle ring 2 extend out of both ends of the lower coil. Both ends of the upper angle ring 1 extend out of both ends of the upper coil, so that the upper angle ring 1 can completely cover both end faces of the upper coil; both ends of the lower angle ring 2 extend out of both ends of the lower coil, so that the lower angle ring 2 can completely cover the lower end face of the lower coil. The above arrangement can prevent the end face of the high-voltage coil from surface discharge, improve the electric field distribution, reduce the electric field concentration, and thus reduce the risk of partial discharge.
[0038] In one embodiment, the first insulating sleeve 11 and the second insulating sleeve 21 have the same size. In order to ensure that the end faces of the upper coil and the lower coil can obtain sufficient insulation support and uniform electric field distribution, the first insulating sleeve 11 and the second insulating sleeve 21 are set to the same size, so that the upper angle ring 1 and the lower angle ring 2 are also the same size, which can simplify the manufacturing process and maintain structural symmetry, which is conducive to mass production and maintenance consistency.
[0039] In one embodiment, the thickness of the first insulating sleeve 11 and the second insulating sleeve 21 are both 0.4 mm to 0.6 mm. In order to ensure the insulation effect and reduce the occupied space, the thickness of the first insulating sleeve 11 and the second insulating sleeve 21 are both set to 0.4 mm to 0.6 mm. In this way, after the four-layer structure is mutually nested, the insulation effect can be ensured and the occupied space can be reduced as much as possible. The best effect is achieved when the thickness of the first insulating sleeve 11 and the second insulating sleeve 21 are both 0.5 mm.
[0040] In one embodiment, the width of the first convex plate 12 and the second convex plate 22 are both 44 mm to 46 mm. By setting the above dimensions, it is ensured that the first groove 13 and the second groove 23 can be covered. The best effect is achieved when the width of the first convex plate 12 and the second convex plate 22 are both 45 mm.
[0041] In one embodiment, the width of the first groove 13 is the distance between the upper angle ring 1 and the upper coil plus 5mm to 7mm. The first groove 13 is used for the circulation of transformer oil and promotes the flow of transformer oil around the upper angle ring 1. Therefore, the first groove 13 needs to have a certain width. Setting the above size can ensure that the transformer oil can flow smoothly and at the same time ensure that the first convex plates 12 on the first insulating grooves of different layers can be staggered to cover the first grooves 13.
[0042] In one embodiment, the width of the second groove 23 is the distance between the lower corner ring 2 and the lower coil plus 5mm to 7mm. The second groove 23 is used for the transformer oil to circulate and promote the transformer oil to flow around the lower corner ring 2. Therefore, the second groove 23 needs to have a certain width. Setting the above size can ensure that the transformer oil can flow smoothly, and at the same time, it can ensure that the second convex plates 22 on the second insulating grooves of different layers can be staggered to cover the first groove 13.
[0043] The utility model also provides a transformer, including a high-voltage coil and the above-mentioned angle ring assembly, the high-voltage coil including an upper coil and a lower coil arranged in a vertical direction, an upper angle ring 1 is sleeved on the upper coil, and a lower angle ring 2 is sleeved on the lower coil. Since the transformer includes all implementations of all embodiments of the above-mentioned angle ring assembly, it has at least all the beneficial effects brought by all the above-mentioned implementations, which will not be repeated here one by one.
[0044] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An angle ring assembly, the angle ring assembly is used to be sleeved on a high-voltage coil, the high-voltage coil is divided into an upper coil and a lower coil arranged in a vertical direction, characterized in that: include: An upper angle ring, the upper angle ring is used to be sleeved on the upper coil, the upper angle ring includes at least four layers of first insulating sleeves, the first insulating sleeves are wound by insulating paperboard, and both ends of each first insulating sleeve are formed with a plurality of first convex plates arranged in a circle around the central axis of the first insulating sleeve, and a first groove is formed between two adjacent first convex plates. The four layers of the first insulating sleeves are sequentially fitted from the inside to the outside, and the first convex plates on adjacent first insulating sleeves are staggered to cover the plurality of first grooves; A lower angle ring, which is used to be sleeved on the lower coil, and includes at least four layers of second insulating sleeves, the second insulating sleeves are formed by winding insulating cardboard, and each of the second insulating sleeves is formed with a plurality of second convex plates arranged in a circle around the central axis of the second insulating sleeve at one end away from the first insulating sleeve, the second convex plates extend outward, and a second groove is formed between two adjacent second convex plates, the four layers of the second insulating sleeves are sequentially fitted from the inside to the outside, and the second convex plates on adjacent second insulating sleeves are staggered to cover the plurality of second grooves.
2. The angle ring assembly according to claim 1, characterized in that: The center line of the first groove of the outer first insulating sleeve of two adjacent first insulating sleeves is aligned with the edge line of the first convex plate of the inner first insulating sleeve.
3. The angle ring assembly according to any one of claims 1 or 2, characterized in that: The center line of the second groove of the outer second insulating sleeve of two adjacent second insulating sleeves is aligned with the edge line of the second convex plate of the inner second insulating sleeve.
4. The angle ring assembly according to any one of claims 1 or 2, characterized in that: Both ends of the upper angle ring extend out of the end surface of the upper coil; and both ends of the lower angle ring extend out of the end surface of the lower coil.
5. The angle ring assembly according to any one of claims 1 or 2, characterized in that: The first insulating sleeve and the second insulating sleeve have the same size.
6. The angle ring assembly according to claim 5, characterized in that: The thickness of the first insulating sleeve and the second insulating sleeve are both 0.4 mm to 0.6 mm.
7. The angle ring assembly according to any one of claims 1 or 2, characterized in that: The width of the first convex plate and the second convex plate are both 44 mm to 46 mm.
8. The angle ring assembly according to any one of claims 1 or 2, characterized in that: The width of the first groove is the distance between the upper angle ring and the upper coil plus 5 mm to 7 mm.
9. The angle ring assembly according to any one of claims 1 or 2, characterized in that: The width of the second groove is the distance between the lower corner ring and the lower coil plus 5mm to 7mm.
10. A transformer, characterized in that: It comprises a high-voltage coil and an angle ring assembly as described in any one of claims 1 to 9, wherein the high-voltage coil comprises an upper coil and a lower coil arranged in a vertical direction, the upper angle ring is sleeved on the upper coil, and the lower angle ring is sleeved on the lower coil.