Switchgear Operating Mechanism With Disc-Guided Position Control
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Solution Overview
Problem
Conventional operating mechanisms for switchgears are complex, have many components, leading to increased malfunction probability and space occupation, and lack precise control over the operation of disconnector and earthing switches.
Innovation Solution
An improved operating mechanism with a simplified structure that uses fewer components, incorporating a motor, transmission mechanism, braking mechanism, and a disc with blocking parts and slots for precise manual control, along with a manual lever for indicating desired positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional operating mechanisms are used to operate disconnector and earthing switches, then the switches can be actuated, but the structure becomes complex with many components increasing malfunction probability and space occupation
Solution Approach 1:
The patent combines the operating mechanisms for both the disconnector switch and earthing switch into a single integrated apparatus. The main shaft is coupled to both switches, and the control system统一管理 both operations, reducing the number of separate mechanisms and components while improving reliability through centralized control
Solution Approach 2:
The control apparatus serves multiple functions: it can operate both the disconnector switch and earthing switch, provides electrical operation mode with motor-driven control, enables manual operation mode with lever and indicator mechanisms, and includes positioning functions with multiple predetermined positions. This multi-functionality reduces the need for separate dedicated mechanisms for each switch
2Ease of operation
If conventional operating mechanisms with many components are used, then the switches can be operated, but the apparatus occupies significant space in the switchgear housing
Solution Approach 1:
By merging the operating mechanisms for both switches into a single compact apparatus with a shared main shaft and integrated control system, the patent significantly reduces the space required compared to having separate mechanisms for each switch
Solution Approach 2:
The patent employs a nested arrangement where the disc with blocking parts and slots is positioned within the main shaft assembly, and the manual lever operates within the same spatial envelope. This nested configuration maximizes space utilization while maintaining full operational capability
3Ease of operation
If conventional operating mechanisms are used, then the switches can be actuated, but precise control over the operation is difficult to achieve
Solution Approach 1:
The patent replaces complex mechanical control mechanisms with an electrical control system using a motor, control circuit, and electronic positioning. The motor can be precisely controlled to rotate the main shaft to specific predetermined positions, providing accurate control without the complexity of mechanical positioning mechanisms
Solution Approach 2:
The patent incorporates feedback mechanisms including indicators that show when the main shaft reaches predetermined positions, and microswitches that detect position and provide feedback to the control system. This feedback enables precise control by confirming when the desired position is achieved
Data Source
AI summary
The apparatus includes a shaft rotatable to a plurality of predetermined positions to change a state of an electric switching device, a motor rotating the shaft via a transmission mechanism when the apparatus operates in an electric operating mode, and a braking mechanism configured to brake the motor in response to the shaft rotated to each position. The apparatus also includes a disc coupled to, and rotatable with the shaft and including a plurality of blocking parts and slots therebetween and a manual lever including a rotatable part and a projecting part arranged at an end thereto. In an apparatus manual operating mode, the projecting part is rotatable into the disc via one of the slots when the shaft is located at one of the positions, and slides out from the disc via another slot when the shaft is rotated to another one of the positions.