Insulation structure of dry-type transformer

Abstract

The utility model relates to the technical field of dry type transformers, in particular to an insulation structure of a dry type transformer. The insulating structure of the dry-type transformer specifically comprises an upper insulating cylinder, a lower insulating cylinder and a nested insulating cylinder, the upper insulating cylinder and the lower insulating cylinder are positioned between the high-voltage winding and the low-voltage winding; the nested insulating cylinder is located at the joint of the upper insulating cylinder and the lower insulating cylinder; the lower insulating cylinder is provided with a boss, and the boss supports the nested insulating cylinder. The utility model has the advantage of satisfying the operation and maintenance requirements of the insulating cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to an insulation structure of a dry-type transformer. Background Art

[0002] Typically, when one winding of a dry-type transformer has a higher voltage, an insulation cylinder is placed between the high-voltage and low-voltage windings. The insulation cylinder is typically flush with or higher than the winding. For larger capacity products, the insulation cylinder is also taller. For installations in confined spaces, an insulation cylinder that is too tall may not meet operational and maintenance requirements.

[0003] Therefore, to address the deficiencies in the prior art, an insulation structure for a dry-type transformer is provided. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an insulation structure for a dry-type transformer, aiming to solve the problem that an insulation cylinder that is too high cannot meet operation and maintenance requirements.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An insulation structure for a dry-type transformer, comprising: an upper insulation cylinder, a lower insulation cylinder and a nested insulation cylinder;

[0007] The upper insulating cylinder and the lower insulating cylinder are located between the high-voltage winding and the low-voltage winding;

[0008] The nested insulating cylinder is located at the connection between the upper insulating cylinder and the lower insulating cylinder;

[0009] The lower insulating cylinder is provided with a boss, and the boss supports the nested insulating cylinder.

[0010] As a further improvement of the technical solution of the present utility model, the boss protrudes 3mm-8mm from the outer peripheral wall of the lower insulating tube.

[0011] As a further improvement of the technical solution of the present utility model, the inner diameter and outer diameter of the upper insulating tube and the lower insulating tube are the same.

[0012] As a further improvement of the technical solution of the present invention, the inner diameter of the nested insulating cylinder is larger than the outer diameters of the upper insulating cylinder and the lower insulating cylinder.

[0013] As a further improvement of the technical solution of the present invention, the outer diameter of the nested insulating cylinder is the same as the outer diameter of the boss.

[0014] As a further improvement of the technical solution of the present invention, the upper insulating tube, the lower insulating tube and the nested insulating tube are all epoxy resin wound tubes.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In the insulation structure of the dry-type transformer of this utility model, a single, taller insulation cylinder is formed into two independent upper and lower insulation cylinders, which can reduce the insulation cylinder's operating and maintenance height. A removable nested insulation cylinder is used to connect the upper and lower insulation cylinders. This ensures the stability of the upper and lower insulation cylinders during normal operation of the product and eliminates insulation hazards that may arise from the air gap between the upper and lower insulation cylinders, ensuring safe and reliable operation of the product while meeting the insulation cylinder's operation and maintenance requirements. This dry-type transformer's insulation structure is characterized by meeting the insulation cylinder's operation and maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technology of the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 It is a structural diagram of the insulation structure of the dry-type transformer of the utility model;

[0019] Figure 2 It is a cross-sectional view of the insulation structure of the dry-type transformer of the utility model.

[0020] In the picture:

[0021] 1. Upper insulating tube;

[0022] 2. Lower insulating cylinder; 21. Boss;

[0023] 3. Nested insulation tube. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0025] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, terms such as "upper," "lower," "left," and "right" used in this disclosure are intended solely to describe the relative positions of the components of the disclosure as shown in the accompanying drawings.

[0026] Reference Figures 1 to 2 , an insulation structure of a dry-type transformer, comprising an upper insulation cylinder 1, a lower insulation cylinder 2 and a nested insulation cylinder 3;

[0027] In one embodiment, the upper insulating cylinder 1 and the lower insulating cylinder 2 are located between the high-voltage winding and the low-voltage winding; the nested insulating cylinder 3 is located at the connection between the upper insulating cylinder 1 and the lower insulating cylinder 2; the lower insulating cylinder 2 is provided with a boss 21, which supports the nested insulating cylinder 3.

[0028] Among them, the single higher insulation tube is made into two independent upper insulation tubes 1 and lower insulation tubes 2, which can reduce the operation and maintenance height of the insulation tube, and a detachable nested insulation tube 3 is used between the upper insulation tube 1 and the lower insulation tube 2 for splicing. This can not only ensure the stability of the upper insulation tube 1 and the lower insulation tube 2 during normal operation of the product, but also eliminate the insulation hidden dangers that may be caused by the air gap between the upper insulation tube 1 and the lower insulation tube 2, ensuring the safe and reliable operation of the product and meeting the operation and maintenance requirements of the insulation tube. The insulation structure of this dry-type transformer has the characteristics of meeting the operation and maintenance requirements of the insulation tube.

[0029] In one embodiment, the boss 21 protrudes 5 mm from the outer peripheral wall of the lower insulation cylinder 2 .

[0030] In one embodiment, the inner and outer diameters of the upper and lower insulating cylinders 1 and 2 are the same. The inner diameter of the nested insulating cylinder 3 is 1 mm larger than the outer diameters of the upper and lower insulating cylinders 1 and 2. The outer diameter of the nested insulating cylinder 3 is the same as the outer diameter of the boss 21.

[0031] In one embodiment, the upper insulating tube 1, lower insulating tube 2, and nested insulating tube 3 are all epoxy resin wound tubes. When winding the lower insulating tube 2, an additional turn of a boss 21 of a certain width is wound at a specified location on the outer surface of the lower insulating tube 2. The boss 21 protrudes from the outer surface of the lower insulating tube 2 by approximately 5 mm and serves to limit the vertical position of the nested insulating tube 3.

[0032] In one embodiment, during assembly, the lower insulating cylinder 2 is placed first, followed by the nested insulating cylinder 3, which is then placed on top of the lower insulating cylinder 2. Finally, the upper insulating cylinder 1 is placed. The nested insulating cylinder 3 is vertically secured by a boss 21. Since its inner diameter is only 1 mm larger than the outer diameters of the upper and lower insulating cylinders 1 and 2, it provides sufficient assembly margin while effectively nesting and securing the upper and lower insulating cylinders 1 and 2. During disassembly, the upper insulating cylinder 1 is removed first, followed by the nested insulating cylinder 3 and the lower insulating cylinder 2.

[0033] For other details of the insulation structure of the dry-type transformer described in the present invention, please refer to the prior art and will not be described in detail here.

[0034] The above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. An insulation structure of a dry-type transformer, characterized in that: include: an upper insulating cylinder, a lower insulating cylinder and a nested insulating cylinder; The upper insulating cylinder and the lower insulating cylinder are located between the high-voltage winding and the low-voltage winding; The nested insulating cylinder is located at the connection between the upper insulating cylinder and the lower insulating cylinder; The lower insulating cylinder is provided with a boss, and the boss supports the nested insulating cylinder.

2. The insulation structure of a dry-type transformer according to claim 1, characterized in that: The boss protrudes from the outer peripheral wall of the lower insulating cylinder by 3mm-8mm.

3. The insulation structure of a dry-type transformer according to claim 1, characterized in that: The inner diameter and outer diameter of the upper insulating tube and the lower insulating tube are the same.

4. The insulation structure of a dry-type transformer according to claim 1, characterized in that: The inner diameter of the nested insulating cylinder is larger than the outer diameters of the upper insulating cylinder and the lower insulating cylinder.

5. The insulation structure of a dry-type transformer according to claim 1, characterized in that: The outer diameter of the nested insulating cylinder is the same as the outer diameter of the boss.

6. The insulation structure of a dry-type transformer according to claim 1, characterized in that: The upper insulating tube, the lower insulating tube and the nested insulating tube are all epoxy resin wound tubes.

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