Heat Shield Sleeve and Collar for Sensor Thermal Isolation
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Solution Overview
Problem
Conventional insulation configurations for exhaust treatment systems in marine applications create a heat flow channel that leads to premature failure of sensors due to excessive heat exposure, necessitating a solution to thermally isolate sensors effectively.
Innovation Solution
A heat shield system comprising a sleeve and collar made of heat-insulating materials, designed to be wrapped around exhaust pipes with a longitudinal slit and openings for sensors, forming an open chamber to shield sensors from heat while allowing access and airflow, thereby preventing insulation from covering the sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional insulation is provided with openings to accommodate sensors, then the insulation can be installed and sensors can be accessed, but heat flows through the insulation and concentrates into the sensor area causing premature sensor failure
Solution Approach 1:
The heat shield is divided into multiple segments (first heat shield segment, second heat shield segment, third heat shield segment) that can be separately installed and positioned around the insulation opening. Each segment contains features like fins or protrusions that engage with corresponding features on adjacent segments, allowing modular assembly that blocks heat flow paths without requiring complete removal or complex modification of the insulation structure.
Solution Approach 2:
The heat shield acts as an intermediary component installed between the hot insulation material and the sensor. It intercepts and blocks heat flow before the heat can reach the sensor, while still allowing the sensor to function through the opening. The heat shield effectively mediates the thermal environment, protecting the sensor from direct heat exposure while maintaining sensor accessibility.
2Object-affected harmful factors
If insulation thickness is increased to improve thermal isolation, then heat protection improves, but the structure becomes more complex and sensor access becomes more difficult
Solution Approach 1:
Instead of increasing insulation thickness in the radial dimension, the solution adds a new dimensional element - the heat shield segments extend in the axial dimension (along the pipe length) and circumferential dimensions. These segments create a three-dimensional barrier structure with fins and protrusions that block heat flow paths from multiple directions, providing effective thermal protection without requiring increased radial insulation thickness.
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 heat shield system effectively reduces sensor exposure to heat, preventing premature failure and ensuring safe operation by maintaining thermal isolation while allowing access for monitoring and maintenance.
Implementation Method 1
a heat shield system comprising a sleeve and collar made of heat-insulating materials
Implementation Method 2
The result is that the sensors 26, in the illustrated configuration, are prone to premature failure from the exposure to heat
Data Source
AI summary
A heat shield system for shielding sensors from heat includes a sleeve portion made of heat-insulating material and has a hollow shape sized and shaped to be wrapped about a pipe of the exhaust treatment system. The sleeve has a longitudinal slit and an opening formed through the sleeve. The opening is configured to receive a sensor. The system includes a collar portion made of heat-insulating material and includes a base part configured to attach to the sleeve portion and a collar enclosure that extends radially from the base part. The collar enclosure defines an open chamber configured to surround the sensor and shield the sensor from heat while permitting access to the sensor. A closure is configured to retain the collar portion on the sleeve portion and hold the heat shield system in place.