External On-Load Tap Changer With Detachable Switch Body
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Solution Overview
Problem
Traditional on-load tap changers face issues such as increased transformer volume, potential oil contamination, limited suitability for high voltage and large current applications, and complex installation and maintenance due to their structural design.
Innovation Solution
An external combined on-load tap changer with a detachable switch body and motor mechanism, allowing for easy installation and maintenance, and a parallel axial and triangular horizontal arrangement of tap changer and tap selector to enhance insulation and adaptability for high voltage and large current applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the switch body is directly mounted in the switch box and inseparable from the whole box, then the structural integrity is improved, but the ease of installation and maintenance deteriorates
Solution Approach 1:
The switch body is designed as a separable component that can be independently removed from the switch box through the top opening. The mounting structure includes positioning nails and mounting plates that allow the switch body to be securely fixed during operation but easily removed when maintenance is needed, dividing the originally integrated structure into separable functional modules.
2Object-affected harmful factors
If the change-over switch oil chamber is separated from the transformer, then the risk of oil contamination is reduced, but the device complexity increases
Solution Approach 1:
The change-over switch oil chamber is completely extracted from the transformer oil tank and positioned separately on the transformer body. This separate oil chamber design prevents contamination of the main transformer oil even if leakage occurs in the change-over switch, while the external positioning reduces structural complexity compared to integrated designs.
3Ease of repair
If the top opening is designed large enough to lift the switch body in and out, then the ease of maintenance is improved, but the structural integrity of the switch box deteriorates
Solution Approach 1:
The switch box top wall is divided into a removable opening section that allows the switch body to be lifted in and out. The opening is sized to accommodate the switch body while maintaining adequate structural support through properly positioned reinforcement ribs and mounting plates, balancing accessibility with structural integrity.
Data Source
AI summary
Disclosed is a suspensible external combined on-load tap changer, including: a switch box, a switch body and a motor mechanism, a top box wall of the switch box being opened with a top opening, a top box cover being mounted on the top opening, wherein the switch body is detachably mounted in the switch box and is entirely lifted in and lifted out by the top opening; and the motor mechanism is connected with the switch body in a driving manner. The switch body in the present invention uses a hoisting structure, and the top box wall of the switch box is opened with a top opening with a size large enough, so that the switch body is directly lifted in and lifted out of the switch box from the top opening, and installation and maintenance are easier.