Switchgear Shutter Mechanism Vertical Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shutter mechanisms in switchgear have complex structures that are accessible to users, leading to safety risks, small distance between phase and earth, and increased assembly complexity, which can result in short circuits and maintenance challenges.
Innovation Solution
A simplified shutter mechanism with a transmission mechanism located below the withdrawable truck, featuring actuating and performing portions, lead screws, and interlocking assemblies, which prevents manual operation and increases the distance between phase and earth, ensuring safety and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the transmission mechanism is arranged on the sides of the withdrawable truck (conventional solution), then the shutter mechanism can be operated, but the structure becomes complicated and accessible to users causing safety risks
Solution Approach 1:
The transmission mechanism is relocated from the horizontal side arrangement to a vertical arrangement below the withdrawable truck. This dimensional change moves the mechanism from an accessible side position to an inaccessible lower position, simplifying the structure while maintaining operational functionality through the coupling of the actuating portion to the performing portion.
2Ease of operation
If the transmission mechanism is arranged on the sides of the withdrawable truck (conventional solution), then the shutter mechanism can function, but the distance between phase and earth becomes small
Solution Approach 1:
By relocating the transmission mechanism to a lower vertical position below the withdrawable truck, the spatial arrangement changes to increase the vertical distance between the phase conductor and the earth reference. This dimensional repositioning resolves the contradiction by providing adequate clearance while preserving the shutter mechanism's operational capability.
3Ease of operation
If the transmission mechanism is arranged on the sides of the withdrawable truck (conventional solution), then the shutter mechanism can be operated, but the assembly becomes duplicated and occupies large space
Solution Approach 1:
The transmission mechanism integrates the actuating portion and performing portion into a unified structure located below the withdrawable truck. This merging eliminates the need for duplicated side arrangements and consolidates the mechanism into a compact configuration that reduces the overall occupied space while maintaining full operational functionality.
4Ease of operation
If the transmission mechanism is accessible to users (conventional solution), then manual operation is possible, but safety risks increase due to potential unauthorized opening
Solution Approach 1:
The transmission mechanism is extracted from the accessible side region and relocated to an inaccessible position below the withdrawable truck. This extraction removes the mechanism from user reach, preventing unauthorized or accidental manual operation while preserving the intended operational functionality through the coupled actuating and performing portions.
5Reliability
If the interlocking assembly is arranged in the conventional manner, then the covers can be prevented from opening, but the assembly is prone to failure
Solution Approach 1:
The interlocking assembly is repositioned to work in conjunction with the transmission mechanism located below the withdrawable truck. This dimensional relocation allows the interlocking function to be integrated into the lower position, simplifying the overall structure while maintaining effective prevention of manual cover opening through the revised spatial arrangement.
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
The solution enhances safety by preventing manual operation of the shutter mechanism, increases the distance between phase and earth, simplifies the assembly process, and reduces the risk of short circuits, thereby improving the reliability and safety of the switchgear.
Implementation Method 1
the performing portion comprises a lead screw with a first threaded portion and a second threaded portion; wherein the first moveable cover is coupled to the first threaded portion via a first bushing and the second moveable cover is coupled to the second threaded portion via a second bushing to move between the block and unblock positions in response to a rotation of the lead screw
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A shutter mechanism (100) for a switchgear (200), comprising: a first moveable cover (101) and a second moveable cover (102) configured to be arranged between fixed contacts (202) and moveable contacts (201) of a circuit breaker on a withdrawable truck (203) of the switchgear (200); and a transmission mechanism (10) configured to be arranged at least in part below the withdrawable truck (203) and coupled to the first and second moveable covers (101, 102), the transmission mechanism (10) adapted to be actuated by a movement of the withdrawable truck (203) to drive the first and second moveable covers (101, 102) to move close to each other to a block position to block the fixed contacts (202) when the withdrawable truck (203) moves to a test position, and move away from each other to an unblock position to unblock the fixed contacts (202) when the withdrawable truck (203) moves from the test position to an intermediate position between the test position and a work position; wherein the transmission mechanism (10) comprises: a first transmission assembly (103) arranged at least in part under the withdrawable truck (203) and coupled to the first moveable cover (101), the first transmission assembly (103) adapted to be actuated by a movement of the withdrawable truck (203) to move the first moveable cover (101); and a second transmission assembly (104) arranged between and coupled to the first and second moveable covers (101, 102), the second transmission assembly (104) adapted to be actuated by a movement of the first moveable cover (101) to drive the second moveable cover (102) to move between a block position and a unblock position in response to the movement of the withdrawable truck (203).