Lockout Device for Pipe Flange Connections
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Solution Overview
Problem
Current lockout devices for pipe flange connections lack effective mechanisms to prevent accidental reactivation of energy sources during maintenance, posing safety risks due to potential misuse or misinterpretation of lockout/tagout procedures.
Innovation Solution
A lockout device comprising a bar, fixed and sliding cup sections, and an engagement mechanism that securely clamps around fasteners, preventing disassembly and blind flange removal, with a lockable mechanism to ensure the device remains engaged until maintenance is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple lockout device is used to prevent access to pipe flange connections, then the device complexity is reduced, but the reliability of preventing accidental reactivation is insufficient
Solution Approach 1:
The lockout device is divided into multiple functional segments: a bar component that spans the flange connection, cup sections that engage with fasteners, and an engagement mechanism with locking components. This segmentation allows each part to perform a specific function, improving overall reliability while keeping individual components simple and manageable.
Solution Approach 2:
The device incorporates preliminary locking actions through the engagement mechanism that engages the bar with the cup sections before final locking. This preliminary engagement ensures that the flange connection is secured early in the locking process, preventing accidental reactivation while maintaining a straightforward operational sequence.
2Reliability
If a secure locking mechanism is implemented to ensure the device remains engaged, then the reliability of lockout is improved, but the ease of operation is reduced
Solution Approach 1:
The engagement mechanism incorporates movable locking components that can be easily actuated to transition between locked and unlocked states. The bar and cup sections are designed with dynamic engagement features that allow for quick securing and releasing, maintaining ease of operation while ensuring reliable lockout when engaged.
Solution Approach 2:
The locking mechanism is designed to be self-locking once engaged, where the bar and cup sections automatically secure in place without requiring additional locking steps. This self-service feature maintains high security while simplifying the operator's task to a single engagement action.
3Reliability
If the lockout device clamps around multiple fasteners to prevent disassembly, then the reliability of preventing unauthorized access is improved, but the device complexity increases
Solution Approach 1:
The bar and cup section design is universal, capable of engaging with multiple different fastener configurations (bolts, nuts, etc.) through a single standardized interface. This multi-functionality allows the device to secure multiple fasteners reliably without increasing structural complexity, as the same basic components adapt to various fastener types.
4Reliability
If the engagement mechanism selectively prevents sliding to ensure secure locking, then the reliability of lockout is improved, but the ease of manufacture is reduced
Solution Approach 1:
The engagement mechanism uses an intermediary locking component that mediates between the bar and cup sections to prevent sliding. This intermediary element provides reliable slide prevention through a simple geometric interface rather than a complex sliding mechanism, improving reliability while maintaining ease of manufacture through straightforward geometric shapes and assembly.
Data Source
AI summary
A lockout device configured to prevent access to a pipe flange connection comprises a bar, a pair of opposed cup sections, and an engagement mechanism. The pair of opposed cup sections may each include a main cup segment coupled to the bar and a hinged cup segment hingedly coupled to the main cup segment. One or more of the main cup segments can be slidably coupled to the bar and the engagement mechanism can be configured to selectively prevent the main cup segments(s) that is/are slidably coupled to the bar from sliding relative to the bar. This engagement mechanism or latch can be hinged on a side of the bar opposite a side of the bar on which the engagement mechanism includes openings for receiving one or more locks.