Insulated Shaft Mechanism for Gas Insulated Switchgear Electrode Drive
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Solution Overview
Problem
Conventional gas insulated switchgear designs require external power transmission structures, leading to increased space requirements and maintenance challenges due to the need for parts outside the enclosure, and inadequate insulation characteristics for the insulated rods.
Innovation Solution
An electrode driving device with an insulated shaft and transmission mechanism housed within the enclosure, utilizing a rotary lever and guide pin system to convert rotational movement into linear movement of the movable electrode, and employing an epoxy-insulated shaft with multiple blades for enhanced insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power transmission structure is located outside the enclosure, then the manipulation is easier to operate, but the area and volume for installation increase
Solution Approach 1:
The patent merges the power transmission structure with the enclosure by locating the insulated shaft and transmission mechanism inside the enclosure rather than outside. This integration eliminates the need for separate external manipulation structures, thereby reducing installation area while maintaining operational functionality through the insulated shaft that extends from the manipulator into the enclosure.
Solution Approach 2:
The insulated shaft is nested within the enclosure structure, extending from the manipulator outside the enclosure into the interior space. This nesting approach allows the power transmission component to be housed within the existing enclosure volume, avoiding additional external space requirements while enabling manipulation operation.
2Ease of manufacture
If the insulated rod extends in the moving direction of the movable electrode, then the power transmission is direct, but a line cannot be set in the moving direction
Solution Approach 1:
The patent changes the orientation of the insulated shaft from extending in the moving direction of the movable electrode to extending in a direction orthogonal to the moving direction. This dimensional change allows the line to be configured in the moving direction while the power transmission structure extends perpendicular to it, enabling both direct power transmission and flexible line configuration.
Solution Approach 2:
The insulated shaft is positioned asymmetrically relative to the movable electrode's moving direction, extending orthogonally rather than parallel. This asymmetric arrangement decouples the power transmission path from the electrode movement path, allowing independent optimization of both functions without mutual interference.
3Ease of manufacture
If the insulated shaft has simple structure, then the manufacturing is easier, but the insulation characteristics are insufficient
Solution Approach 1:
The insulated shaft is constructed using composite materials, specifically combining a core structure with an insulating material layer. This composite structure provides both the mechanical strength needed for power transmission and the electrical insulation properties required for reliable operation in the gas insulated switchgear environment.
Solution Approach 2:
The insulated shaft features localized insulation enhancement at critical areas, particularly where it penetrates the enclosure and interfaces with conductive components. The insulating properties are concentrated where electrical stress is highest, while other portions maintain simpler structures for ease of manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the external space requirements, eliminates the need for separate shielding, and improves insulation performance by reducing the electric field per unit area, thereby enhancing the overall efficiency and reliability of the gas insulated switchgear.
Implementation Method 1
an insulated shaft rotated by a driving force transmission member operated by a driving force of a manipulator located outside the enclosure
Implementation Method 2
a transmission mechanism driven by the insulated shaft and configured to transmit a driving force of the insulated shaft to the movable electrode such that the movable electrode moves into and out of the conductor
Implementation Method 3
employing an epoxy-insulated shaft with multiple blades for enhanced insulation... improves insulation performance by reducing the electric field per unit area
Data Source
AI summary
A movable electrode driving device for a gas insulated switchgear is proposed. A movable electrode may be installed at one of conductors installed in an enclosure inner space of an enclosure. The movable electrode may move into and out of the conductor. Power for driving the movable electrode may be transmitted from a manipulator. A rotation manipulation lever may be installed at the outside of the enclosure, and an insulated shaft may be located inside the enclosure, the insulated shaft being connected to the rotation manipulation lever and extending into the conductor. A rotary lever may be located inside the conductor by being connected to the insulated shaft, and a transmission lever driven by the rotary lever so as to move the movable electrode may be provided.