Composite Crossarm Conversion Apparatus Fastener Protection
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Solution Overview
Problem
Composite crossarms used in utility poles are prone to damage from fasteners, which can compromise their structural integrity and UV protective coating, especially when affixing extension arms, leading to potential power outages and financial penalties.
Innovation Solution
The utility pole auxiliary crossarm conversion apparatus (CAC) features a quadrilateral structure with a solid first portion made of corrosion-resistant materials, a chamfered edge, and an indentation to distribute pressure evenly, along with a second portion using elastic polymers to reduce abrasion and structural harm, allowing secure attachment of extension arms without damaging composite crossarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fasteners are used to affix extension arms to composite crossarms, then the extension arms can be securely attached, but the fasteners can scratch, chip, puncture and crack the composite material, compromising structural integrity and UV protective coating
Solution Approach 1:
The patent introduces an intermediary device (the crossarm conversion apparatus with recessed receiving structure) between the fastener and the composite crossarm. This intermediary captures and contains the fastener, preventing direct contact with the composite material surface, thereby eliminating scratching, chipping, puncturing and cracking while maintaining secure attachment
Solution Approach 2:
The fastener is nested within the recessed receiving structure formed by the first and second portions of the conversion apparatus. This nesting configuration allows the fastener to be securely held in place while being protected from causing damage to the composite crossarm, as the recessed structure acts as a containment chamber
2Productivity
If conventional attachment methods are used, then extension arms can be installed, but the UV protective coating on composite crossarms is compromised due to fastener contact
Solution Approach 1:
The conversion apparatus serves as a protective intermediary that preserves the UV protective coating by preventing fastener contact with the composite crossarm surface. The recessed receiving structure allows the coating to remain intact on the outer surface while still enabling secure fastener attachment internally
3Reliability
If fasteners directly attach to composite crossarms, then extension arms are secured, but environmental degradation is accelerated due to compromised material integrity
Solution Approach 1:
The conversion apparatus acts as a protective intermediary that maintains the composite crossarm's material integrity by preventing fastener-induced damage. This preservation of structural integrity and UV coating extends the service life of the crossarm while ensuring reliable extension arm attachment
Solution Approach 2:
The recessed receiving structure provides beforehand cushioning by creating a protective cavity that absorbs and distributes fastener-induced stresses, preventing them from reaching the composite crossarm material. This prior protection mechanism prevents damage before it can occur, extending the crossarm's durable service life
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 CAC apparatus enhances the structural integrity and durability of composite crossarms, preventing damage from fasteners and environmental degradation, ensuring reliable and efficient utility pole maintenance across various weather conditions without compromising the UV protective coating.
Implementation Method 1
a second portion (120) configured to reduce the ability of the CAC to cause structural harm to the composite crossarm (810)
Data Source
AI summary
A utility pole crossarm conversion apparatus is disclosed. The apparatus includes first and second portions. The second portion is oriented opposite the first side. An indentation is positioned on the first side. A second portion is affixed to the second side. The first portion includes a chamfered edge. The indentation is bilaterally concaved and includes an apex angled at 45°-90°. The indentation is configured to receive a tip of a fastener of a utility pole cross arm clamp coupled to a composite utility pole extension arm. The indentation is medially positioned on the first side. The indentation initiates centrally on the first side and extends transversely across the first side to the chamfered edge. The first portion includes a metal. The second portion includes an elastic polymer. The apparatus includes an overall quadrilateral structure. The apparatus is configured to be frictionally coupled to a composite crossarm via the second portion.