Insulating Frame for Gas Insulated Switchgear Disconnecting Device
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Solution Overview
Problem
Conventional disconnecting devices in gas-insulated switchgear face issues with terminal alignment, requiring complex assembly processes and increased material usage due to inadequate bending solidity, leading to prolonged assembly times and higher costs.
Innovation Solution
The design incorporates an insulating frame with separated side wall portions, including first, second, and third base portions for secure terminal fixation, enhancing bending solidity and reducing material usage through optimized geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If terminals are fixed on an identical support insulating component with fixed attachment positions, then the structure is simple, but the parallel degree of terminals cannot be guaranteed due to hole diameter and shaft diameter differences causing inclination during tightening
Solution Approach 1:
The support insulating component is segmented into multiple independent terminal fixing portions, each with its own positioning structure. This allows each terminal to be independently positioned and adjusted, ensuring parallel degree while maintaining overall structural simplicity.
Solution Approach 2:
Positioning protrusions and positioning holes are introduced as intermediary elements between the support insulating component and terminals. These intermediaries ensure accurate relative positioning during assembly, preventing inclination caused by diameter differences while requiring only simple bolt tightening.
2Loss of substance
If a conventional insulating frame structure is used, then material usage is high, but bending solidity is inadequate leading to assembly difficulties
Solution Approach 1:
The insulating frame is designed with locally reinforced structures at critical positions where bending forces occur. Instead of uniformly increasing material throughout, reinforcement is concentrated at specific areas needing higher bending solidity, reducing overall material usage while maintaining strength.
Solution Approach 2:
The insulating frame utilizes composite material construction combining different materials with complementary properties. This allows achieving high bending solidity with reduced material quantity by strategically selecting materials for different functional requirements within the same structure.
3Device complexity
If terminal positions are fixed on an identical support insulating component, then assembly structure is simple, but assembly time is prolonged due to required adjustment operations
Solution Approach 1:
The terminal fixing portions are pre-positioned and pre-adjusted during manufacturing to achieve the correct parallel degree. This preliminary action eliminates the need for time-consuming adjustment operations during final assembly, while the overall assembly structure remains simple.
Solution Approach 2:
The positioning protrusions and holes are designed to automatically guide and align terminals during assembly without requiring external jigs or complex adjustment mechanisms. The structure itself performs the positioning function, reducing assembly time while maintaining simplicity.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
It is intended to obtain a disconnecting device which is easily assembled and can be assembled in a short time. An insulating frame (10) includes side wall portions (14) which are provided in a state where the side wall portions (14) include a space portion and are separated; a first base portion (11) which is integrally provided, at one side end portion of the side wall portions (14), with the side wall portions (14), and includes a fixing portion (15) by which an connecting terminal (20) is fixed; second base portions (12) which are integrally provided, between the wall portions (14), with the side wall portions (14), and include a fixing portion (15) by which a hinge terminal (24), to which a movable blade (25) is rotatably linked, is fixed; and third base portions (13) which are integrally provided, at the other side end portion of the side wall portions (14), with the side wall portions (14), and are fixed to a tank front plate (102a) of a gas pressure tank (102).