High-tension bushing of distribution transformer

Abstract

The invention discloses a high-tension bushing of a distribution transformer, and relates to the technical field of transformer equipment. The high-tension bushing comprises a cover plate and a high-tension bushing body, a bushing mounting hole is arranged in the middle of the cover plate, and the bottom end of the high-tension bushing body penetrates through the bushing mounting hole on the cover plate. The high-tension bushing is characterized in that a fixing plate is arranged on an area of the high-tension bushing body penetrating through the bushing mounting hole, two ends of the fixing plate are connected with the cover plate through fixing plate fastening bolts, and limit springs are arranged on two sides of the fixing plate contacting with the high-tension bushing body. Fixed welding of a stud on the cover plate is omitted, working hours are shortened, efficiency is improved, a creep distance is increased, discharge is decreased, a rubber sealing part is uniformly stressed, sealing effects are fine, oil does not easily leak, and the high-tension bushing is attractive in appearance and free of thermal stress deformation.

Description

technical field [0001] The invention relates to the technical field of transformer equipment, in particular to a high-voltage bushing of a distribution transformer. Background technique [0002] The normal installation method of distribution transformer high voltage bushing is (such as figure 1 Shown): cover plate production--punching the bushing installation hole (φ70mm) on the cover plate 15--welding three M12*55 studs 11 after being equally divided with the high-voltage bushing 1 concentric circle (φ115mm)--put Put the high-voltage bushing 1 into the installation hole (put a sealing ring 14 between the cover plate 15) -- put special presser feet 13 on the three studs 11 -- finally press the nuts 12 on the studs 11 Feet 13. The disadvantages of this process are: 1. When the stud is welded, the cover plate is easily deformed in a boat shape when it is heated, and it is easy to splash small solder joints or spark marks on the position where the sealing ring is placed, resu...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: 1. When the stud is welded, the cover plate is easily deformed in a boat shape when it is heated, and it is easy to splash small solder joints or spark marks on the position where the sealing ring is placed, resulting in poor sealing and oil leakage; 2. Since both the stud and the presser foot are metal, the creepage distance of the bushing is virtually reduced, and discharge phenomenon is likely to occur; 3. When the presser foot is fastened, it is easy to cause uneven force on the three presser feet, and the one with large force It is easy to crush the casing, and the seal with small force will not be pressed tightly, and oil leakage will easily occur

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