Dry-type transformer capable of preventing breakdown

Abstract

According to the technical scheme, the dry-type transformer capable of preventing breakdown is characterized in that the dry-type transformer comprises a plurality of windings arranged side by side and two iron yoke assemblies located at the upper ends and the lower ends of the windings respectively, and the windings comprise low-voltage windings and high-voltage windings which are coaxially arranged and distributed inside and outside; an inter-phase insulating partition plate is arranged between every two adjacent windings, a high-low voltage partition plate is arranged between the low-voltage winding and the high-voltage winding, and the problems that in the prior art, the occupied space is large, and the breakdown phenomenon is likely to happen are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and more particularly to a dry-type transformer capable of preventing breakdown. Background Art

[0002] Compared with oil-immersed transformers, dry-type transformers do not need to use transformer oil as an insulating medium, so they will not cause oil pollution to the environment or cause fires. They are safer and more environmentally friendly and are more suitable for indoor places. They do not need to replace transformer oil regularly, have low maintenance costs, long service life, and reduce the frequency and cost of maintenance work.

[0003] During the actual use of dry-type transformers, its shortcomings are also obvious. First, it abandons transformer oil as an insulating medium and exposes the windings to the air. Since the insulation performance of transformer oil is much higher than that of air, the distance between high and low voltages and between phases will be larger than that of oil-immersed transformers, resulting in an increase in the outer diameter of the winding, which will increase the use of winding materials and thus increase the manufacturing cost of dry-type transformers; second, the greater the distance between the windings, the lower the energy conversion efficiency between high and low voltages; third, during the power-on process of the transformer, the electric and magnetic fields generated by the windings will accelerate the air molecules, causing the air molecules to produce electrons and ions due to collision. This phenomenon is called "ionization". As the "ionization" phenomenon continues to occur, the gap between the windings will suddenly become conductive, causing flashover and spark discharge. This is a phenomenon of air "breakdown", which poses a safety hazard. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a dry-type transformer which occupies less space, has high energy conversion efficiency and is anti-breakdown.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dry-type transformer capable of preventing breakdown, comprising a plurality of windings arranged side by side and two iron yoke assemblies respectively positioned at the upper and lower ends of the plurality of windings, wherein the plurality of windings each comprise a low-voltage winding and a high-voltage winding which are coaxially arranged and distributed inside and outside, an interphase insulating partition is arranged between adjacent windings, and a high-low voltage partition is arranged between the low-voltage winding and the high-voltage winding.

[0006] As a further improvement of the utility model, the two iron yoke assemblies each include an iron yoke body and an end insulating partition located between the iron yoke body and the winding.

[0007] As a further improvement of the utility model, an anti-breakdown layer is provided on the outer surfaces of the interphase insulating partition, the high-low voltage partition and the end insulating partition.

[0008] The beneficial effects of the utility model are as follows: compared with the prior art design that does not separate the low-voltage winding and the high-voltage winding, the design of adding a high-low-voltage partition between the low-voltage winding and the high-voltage winding can reduce the overall diameter of the winding, thereby reducing the volume of the winding, indirectly reducing the overall volume of the utility model and the size of related parts, and achieving the purpose of reducing production and use costs. Furthermore, the reduced distance between the low-voltage winding and the high-voltage winding can improve the energy conversion efficiency between the low-voltage winding and the high-voltage winding. At the same time, the high-low-voltage partition can improve the anti-breakdown ability between the low-voltage winding and the high-voltage winding, avoid the occurrence of breakdown, and thus improve safety; compared with the prior art design, the design of arranging interphase insulating partitions between each winding can improve the anti-breakdown ability between adjacent windings, thereby ensuring the safe use of adjacent windings, and at the same time can reduce the installation distance between adjacent windings, thereby reducing the size requirements of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the front view of the utility model;

[0010] Figure 2 for Figure 1 Enlarged view of point C in the middle;

[0011] Figure 3 for Figure 1 Sectional view at AA in the middle;

[0012] Figure 4 for Figure 3 The enlarged view of point D in the middle;

[0013] Figure 5 for Figure 1 Sectional view at the middle BB;

[0014] Figure 6 for Figure 5 Enlarged view of point E in the middle.

[0015] Figure numerals: 1. Anti-breakdown layer; 2. Winding; 21. Low-voltage winding; 22. High-voltage winding; 3. Iron yoke assembly; 31. Iron yoke body; 32. End insulating partition; 4. Interphase insulating partition; 5. High-low voltage partition. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are indicated by the same reference numerals.

[0017] Reference Figures 1 to 6 As shown, a dry-type transformer capable of preventing breakdown in this embodiment includes a plurality of windings 2 arranged side by side and two iron yoke assemblies 3 respectively positioned at the upper and lower ends of the plurality of windings 2, wherein the plurality of windings 2 each include a low-voltage winding 21 and a high-voltage winding 22 coaxially arranged and distributed inside and outside;

[0018] Based on the aforementioned prior art, a plurality of windings 2 are separated from each other by an interphase insulating partition 4, and the two ends of the interphase insulating partition 4 are respectively connected to two iron yoke assemblies 3, and the high-low voltage partition 5 can be designed to be annular or bent from a straight plate, and the high-low voltage partition 5 is sleeved outside the low voltage winding 21, and then the high voltage winding 22 is sleeved outside the high-low voltage partition 5. Compared with the prior art design that does not separate the low voltage winding 21 and the high voltage winding 22, the design of the high-low voltage partition 5 can reduce the overall diameter of the winding 2, thereby reducing the volume of the winding 2, and indirectly reducing the overall volume of the utility model and the size of related parts. inch, achieving the purpose of reducing production and use costs. Furthermore, the reduced distance between the low-voltage winding 21 and the high-voltage winding 22 can improve the energy conversion efficiency between the low-voltage winding 21 and the high-voltage winding 22. At the same time, the high-low voltage partition 5 can improve the anti-breakdown ability between the low-voltage winding 21 and the high-voltage winding 22, avoid the occurrence of breakdown, and thus improve safety; the design of the interphase insulating partition 4 can improve the anti-breakdown ability between adjacent windings 2 compared with the prior art, thereby ensuring the safe use of adjacent windings 2, and at the same time can reduce the installation distance between adjacent windings 2, thereby reducing the size requirements of the utility model.

[0019] As a specific implementation method of the improvement, refer to Figure 5 and Figure 6 As shown, the two yoke assemblies 3 each include an yoke body 31 and an end insulating partition 32 located between the yoke body 31 and the winding 2. Compared with the prior art design of directly placing the yoke body 31 above or below the winding 2, the design of the end insulating partition 32 can prevent breakdown between the yoke body 31 and the winding 2, thereby ensuring safety in use.

[0020] As a specific implementation method of the improvement, refer to Figure 2 As shown, a layer of varnish can be sprayed on the outer surfaces of the interphase insulating partition 4, the high-low voltage partition 5 and the end insulating partition 32 to form an anti-breakdown layer 1. Such a design can further improve the anti-breakdown capability of each insulating partition, thereby further ensuring the safety of the utility model during use.

[0021] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dry-type transformer capable of preventing breakdown, comprising a plurality of windings (2) arranged side by side and two iron yoke assemblies (3) respectively positioned at the upper and lower ends of the plurality of windings (2), wherein the plurality of windings (2) each comprise a low-voltage winding (21) and a high-voltage winding (22) coaxially arranged and distributed inside and outside, characterized in that: Interphase insulating partitions (4) are provided between adjacent windings (2), and a high-low voltage partition (5) is provided between the low-voltage winding (21) and the high-voltage winding (22).

2. A dry-type transformer capable of preventing breakdown according to claim 1, characterized in that: The two iron yoke assemblies (3) each include an iron yoke body (31) and an end insulating partition (32) located between the iron yoke body (31) and the winding (2).

3. A dry-type transformer capable of preventing breakdown according to claim 2, characterized in that: The outer surfaces of the interphase insulating partition (4), the high-low voltage partition (5) and the end insulating partition (32) are all provided with an anti-breakdown layer (1).

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