Composite bushing for transformer
By setting outwardly protruding flange and sealing ring on the outer wall of the insulating pipe, the problem of sealing ring damage during transformer assembly is solved, efficient sealing of the transformer is achieved, and production costs and finished product scrapping rate is reduced.
Patent Information
- Application Number
- CN202422479200.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-14
AI Technical Summary
During the assembly process, the sealing ring is damaged due to inadequate flange crimping during the existing transformer porcelain casing, resulting in the leakage of transformer oil, which is high production cost and high scrap rate of finished products.
The outer wall of the insulating pipe is equipped with a flange portion protruding outward, and the sealing ring sleeve is located below the flange portion. The outer diameter of the sealing ring is smaller than the outer diameter of the flange portion. The flange portion and the insulating pipe are integrally formed. The flange portion is connected to the transformer box flange as a sealing surface to realize direct sealing between the product and the transformer.
It reduces assembly process requirements, reduces production costs and finished product scrapping rate, and ensures that the product does not leak oil.
Smart Images
Figure CN223218106U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a composite bushing for a transformer. Background Art
[0002] The partial picture of the existing transformer porcelain bushing is as follows Figure 2 As shown in the figure, flange 2 is crimped onto insulating tube 1, and adhesive is provided between flange 2 and insulating tube 1. To ensure sealing, sealing ring 3 is provided between insulating tube 1 and flange 2. Since flange 2 is directly crimped onto insulating tube 1, if the crimping is not in place (the axis of flange 2 is tilted), sealing ring 3 will be damaged. After the porcelain bushing is assembled with the transformer, transformer oil will leak from the adhesive area (such as Figure 2 The arrow path in the figure) has high production costs because it requires extremely high precision in the crimping process and equipment. Summary of the Invention
[0003] The utility model provides a composite bushing for a transformer in order to solve the problems existing in the above-mentioned prior art.
[0004] The technical solutions adopted in this utility model are:
[0005] A composite bushing for a transformer comprises an insulating tube, a flange and a sealing ring. The outer wall of the insulating tube is provided with a flange portion protruding outward, the flange is crimped onto the flange portion, the sealing ring is sleeved on the insulating tube, and the sealing ring is located below the flange portion. The outer diameter of the sealing ring is smaller than the outer diameter of the flange portion.
[0006] Furthermore, the flange portion and the insulating tube are integrally formed.
[0007] Furthermore, the insulating tube is a ceramic bushing or is formed by winding glass fiber impregnated with epoxy resin.
[0008] The utility model has the following beneficial effects:
[0009] The utility model converts the existing product seal into an assembly seal between the product and the transformer, thereby reducing the requirements for the crimping assembly process of the product itself, greatly reducing costs, and reducing the scrap rate of finished products. The product itself does not have leakage problems.
[0010] During assembly, the utility model does not require a sealing ring between the flanges and the flange parts. The sealing surface is arranged in the glue-fitting area, so that when the flange provided by the insulating tube is installed with the flange of the transformer box, the installation sealing ring can be inserted to achieve a direct sealing effect. The flange on the insulating tube only serves to connect with the flange of the transformer box. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a structural diagram of the utility model.
[0012] Figure 2 The invention relates to a sealing structure of a flange on an insulating tube in the prior art. DETAILED DESCRIPTION
[0013] The present invention will be further described below with reference to the accompanying drawings.
[0014] like Figure 1 The utility model is a composite bushing for a transformer, comprising an insulating tube 1, a flange 2 and a sealing ring 3. A flange portion 11 protruding outward is provided on the outer wall of the insulating tube 1, the flange 2 is crimped onto the flange portion 11, and the sealing ring 3 is sleeved on the insulating tube 1, and the sealing ring 3 is located below the flange portion 11, and the outer diameter of the sealing ring 3 is smaller than the outer diameter of the flange portion 11.
[0015] When assembled with the transformer, the insulating tube 1 is inserted into the transformer and sealed by the sealing ring. The utility model converts the existing product seal into an assembly seal between the product and the transformer, thereby reducing the requirements for the crimping assembly process of the product itself, greatly reducing the cost, and reducing the scrap rate of the finished product. There is no leakage problem in the product itself.
[0016] The flange portion 11 is integrally formed with the insulating tube 1 . The insulating tube 1 is a ceramic sleeve or is formed by winding glass fiber impregnated with epoxy resin. Both structures are equally applicable.
[0017] This application uses the stepped surface formed by the flange portion 11 as a seal, and is used in conjunction with a rubber ring, so there is no risk of leakage. The flange 2 is glued to the outside of the sealing ring, and the product itself cannot leak oil.
[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.
Claims
1. A composite bushing for a transformer, comprising an insulating tube (1), a flange (2) and a sealing ring (3), characterized in that: The outer wall of the insulating tube (1) is provided with a flange portion (11) protruding outward, the flange (2) is crimped onto the flange portion (11), the sealing ring (3) is sleeved on the insulating tube (1), and the sealing ring (3) is located below the flange portion (11), and the outer diameter of the sealing ring (3) is smaller than the outer diameter of the flange portion (11).
2. The composite bushing for transformer according to claim 1, characterized in that: The flange portion (11) and the insulating tube (1) are integrally formed.
3. The composite bushing for transformer according to claim 1, wherein: The insulating tube (1) is a ceramic sleeve or is formed by winding glass fiber impregnated with epoxy resin.