Switchgear Interlock Mechanism for Synchronized Operation
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Solution Overview
Problem
Existing mechanisms for the synchronized operation of vacuum bottle switching devices and selector devices in switchgear lack a balanced and reliable interlocking system, leading to one mechanism becoming inoperable when the other is operating, which compromises safety and reliability.
Innovation Solution
A 4-position mechanism with interlocks and dedicated energy storage and releasing means for both devices, utilizing articulated levers and a push button to ensure synchronized closing and opening operations, with specific access control through shutter mechanisms to prevent simultaneous operation of the switching device and selector device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate energy storage and releasing means are provided for vacuum bottle switching device and selector device, then operational reliability is improved, but device complexity increases
Solution Approach 1:
The mechanism is divided into separate energy storage and releasing means for the vacuum bottle switching device and selector device. Each device has its own dedicated energy storage spring and releasing mechanism, ensuring independent operation and preventing interference between the two devices. This segmentation improves reliability by isolating energy storage functions while managing complexity through modular design.
2Reliability
If interlock arrangements are provided to control access to operating means, then safety is improved, but ease of operation deteriorates
Solution Approach 1:
Interlock arrangements act as intermediary mechanisms between the operator and the operating means. These interlocks prevent simultaneous operation of the vacuum bottle switching device and selector device by controlling access to their respective operating means. The interlocks automatically engage and disengage based on the operational state, providing safety without requiring complex manual intervention, thus maintaining ease of operation.
3Reliability
If synchronized operation mechanism is implemented, then operational safety is improved, but mechanism complexity increases
Solution Approach 1:
The mechanism combines the energy storage, releasing, and interlocking functions into a unified synchronized operation system. The interlock arrangements are integrated with the energy storage and releasing means, allowing the mechanism to achieve synchronized operation of the vacuum bottle switching device and selector device. This merging reduces overall complexity by eliminating separate control systems while maintaining operational safety.
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5b
AI summary
The present invention discloses a 4-position mechanism for the synchronized operation of closing and opening of a vacuum bottle switching device and a selector device. The synchronized operation is achieved with the help of interlock arrangements. Each of the vacuum bottle switching device and the selector device comprise separate energy storage and releasing means. Energy is loaded into both the devices by the user input with the help of dedicated levers. The movement in the output shafts is observed only after the dead point has been reached. Any movement from dead point to the main output shaft is transmitted through articulated levers. In the vacuum bottle switching device, conversion of energy makes the main shaft translate in one direction to close the switch and also, stores energy for translation of the shaft in opposite direction to open the switch. Said interlock arrangements are configured such that upon insertion of a removable handle into an accessible handle receptor (33,14,38) of any one of the selector operating means, switching device operating means or earth operating means, the access to the remaining operating means is blocked.