Cable Cleat Clamping with Visual Force Indication
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Solution Overview
Problem
Existing cable cleats and glands face issues with inconsistent clamping force, leading to potential damage of insulating materials and failure to retain cables, especially under fault current conditions or axial loading, making it difficult to determine if sufficient clamping force is applied.
Innovation Solution
A clamping apparatus with indicator means that provides a visual indication of exceeding a predetermined clamping force level, including movable parts and prevention mechanisms to avoid excessive force, ensuring reliable operation and easy inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If excessive clamping force is applied to the cables, then the cable clamping apparatus can effectively retain the cables in position, but the insulating material on the external surface of the cables can be damaged
Solution Approach 1:
The patent implements a visual feedback mechanism through indicator portions that change position or visibility based on the clamping force applied. When the clamping force reaches a safe and sufficient level, the indicator provides visual confirmation to the operator, preventing both insufficient clamping (which would compromise retention) and excessive clamping (which would damage insulation). This feedback loop resolves the contradiction by guiding the operator to apply the optimal amount of force.
2Object-affected harmful factors
If insufficient clamping force is applied to the cables, then the insulating material on the cables is protected from damage, but the cable clamping apparatus fails to effectively retain the cables in position in the event of a fault current
Solution Approach 1:
The visual indicator mechanism provides real-time feedback during the clamping process, showing the operator when sufficient clamping force has been achieved. This ensures that the minimum required force is applied to guarantee cable retention during fault conditions, while avoiding the application of excessive force that would damage the insulating material. The indicator eliminates uncertainty about whether adequate clamping has been achieved.
3Device complexity
If no indicator means is provided, then the clamping apparatus structure remains simple, but it is difficult to determine when inspecting the cable gland whether sufficient clamping force has been applied
Solution Approach 1:
The patent employs visual indicators that change their appearance or position based on the clamping force applied. These indicators may change color, move to different positions, or become visible/hidden depending on whether sufficient clamping force has been achieved. This provides an intuitive visual measurement of clamping force sufficiency without significantly complicating the overall apparatus structure, directly addressing the contradiction between simplicity and detectability.
Data Source
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AI summary
A clamping apparatus (24) for a cable cleat (2) or cable gland is disclosed. The clamping apparatus comprises a bolt (22) having a first threaded portion, a nut (26) having a second threaded portion adapted to engage the first threaded portion to apply a clamping force to cables (4) an object, and an indicator device (28). The indicator device (28) provides visual indication that the clamping force exceeds a first predetermined level.