Self-Locking Dust Cap for Solar Connector Lockout
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Solution Overview
Problem
Conventional lockout devices for solar connectors in large-scale solar power plants are inefficient and prone to corrosion due to dust and moisture exposure, posing electrical safety risks, and often require separate components for lockout and dust prevention, which are cumbersome and costly.
Innovation Solution
A self-locking dust cap lockout device that integrates lockout and dust prevention features into a single component, requiring a tool for removal and featuring a tamper-indicating safety tag, ensuring secure and efficient installation and preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If flexible bags are used to cover connectors, then dust and moisture exposure is prevented, but the bags can be easily removed, fall off, and collect water causing corrosion
Solution Approach 1:
The patent combines the dust cap and lockout device into a single integrated unit. The dust cap is not merely a separate cover but is structurally merged with the lockout body, creating a unified component that simultaneously provides environmental protection and lockout functionality. This eliminates the need for separate flexible bags and improves reliability through integrated design.
Solution Approach 2:
The lockout device acts as an intermediary between the connector and the environment. Rather than using a simple flexible bag that directly contacts the connector, the lockout device with its structured body, ledges, and tabs provides an intermediate protective structure that secures the dust cap in place while preventing direct exposure to harmful elements.
2Reliability
If separate components are used for lockout and dust prevention, then each function can be optimized, but the system becomes cumbersome and costly
Solution Approach 1:
The patent merges the lockout device and dust cap into a single integrated component. The body structure serves dual purposes: providing lockout tabs for safety while simultaneously forming the dust cap enclosure. This reduces the total number of components from multiple separate parts to a unified assembly, simplifying the system while maintaining functional optimization.
Solution Approach 2:
The integrated lockout device performs multiple functions simultaneously: it provides lockout capability through tabs that engage with ledges, prevents dust and moisture ingress through the enclosed body structure, and includes through-bores for safety tag attachment. This multi-functional design eliminates the need for separate components for each function.
3Productivity
If connectors are installed weeks or months before final connection, then construction schedules are flexible, but connection points are exposed to outdoor elements
Solution Approach 1:
The integrated lockout device with its enclosed body structure provides preliminary protection to connectors installed ahead of schedule. The dust cap enclosure is formed as part of the lockout device itself, creating a protective environment before the final connection is made, thereby preventing exposure to outdoor elements during the extended installation period.
Solution Approach 2:
The lockout device body serves as an intermediary protective structure between the connector and the outdoor environment. During extended storage or delayed connection periods, this intermediate structure shields the connector from rain, dust, and moisture while allowing the construction schedule to remain flexible.
Data Source
AI summary
The devices described herein include a body extending between a proximal end and a distal end, and having an interior volume therein. A first projection extends from the body at the distal end, and includes a first through-bore, where the first projection forms a first channel with the body. A first ledge is positioned within the first channel and on the first projection, the first ledge extending towards the body. A second projection extends from the body at the distal end, opposite the first projection, and includes a second through-bore, where the second projection forms a second channel with the body. A second ledge is positioned within the second channel and on the second projection, the second ledge extending towards the body.