Fire-Resistant FRP Pole Sleeve With Post-Fire Temperature Sensing
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Solution Overview
Problem
Fiber reinforced polymer (FRP) utility poles face structural integrity issues when exposed to high temperatures during fires, necessitating a method to assess their integrity post-fire for timely replacement decisions.
Innovation Solution
A fire retardant sleeve assembly with an outer fiberglass shell and intumescent insulation layer, incorporating temperature sensors to measure maximum surface temperatures, allowing for post-fire inspection of structural integrity and determining whether the pole should be replaced or retained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FRP poles are used to improve durability and resistance to corrosion, then reliability is improved, but structural integrity deteriorates when exposed to high temperatures during fires
Solution Approach 1:
The patent applies composite materials by combining FRP pole with a fire retardant sleeve assembly consisting of an outer fiberglass shell and an inner intumescent insulation layer. This composite structure allows the pole to maintain both corrosion resistance and fire protection, resolving the contradiction between durability and high-temperature structural integrity.
Solution Approach 2:
The fire retardant sleeve assembly acts as an intermediary protective layer between the FRP pole and the fire environment. The intumescent material expands when exposed to heat, creating an insulating barrier that protects the pole's structural integrity while the pole itself maintains its corrosion-resistant properties.
2Measurement precision
If temperature sensors are added to assess structural integrity post-fire, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The fire retardant sleeve assembly serves multiple functions: it provides fire protection through intumescent insulation and simultaneously houses temperature sensors for structural integrity assessment. This multi-functionality allows temperature measurement capability to be added without proportionally increasing complexity, as the sensors are integrated into the existing protective structure.
Solution Approach 2:
The temperature sensors are nested within the fire retardant sleeve assembly, specifically positioned beneath the sleeve at locations that allow them to measure temperatures affecting the pole's structural integrity. This nesting approach allows the measurement system to be incorporated into the protective structure rather than adding separate external components.
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 system effectively protects FRP poles from excessive heat, maintaining structural integrity and enabling utility companies to decide on pole replacement based on temperature data, ensuring safety and reliability.
Implementation Method 1
the inner insulation layer comprises an intumescent material
Data Source
AI summary
A utility pole system that provides for easy temperature inspection of the fiberglass reinforced plastic utility pole. The system may include utility pole and a sleeve arranged around the pole, and a temperature sensor positioned underneath the sleeve.