Inverted-V Asphalt Hopper Stability and Heat Distribution
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Solution Overview
Problem
Existing portable asphalt heaters face challenges in maintaining stability during transport of heavy loads and achieving efficient heat transfer, leading to increased fuel consumption and environmental impact.
Innovation Solution
The design features an inverted-V geometry for the asphalt hopper with a wider base and tapered sides, combined with a heating manifold system that directs heated gases through chimneys along the hopper walls, enhancing stability and heat distribution without the need for agitation or conveyancing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional V-shaped hopper geometry is used, then the opening area is larger for easy loading, but the centre of gravity is higher reducing stability during transport
Solution Approach 1:
The patent inverts the traditional V-shaped hopper geometry to create an inverted-V shape where the base is wider than the opening. This inversion lowers the centre of gravity of the asphalt load, thereby improving vehicle stability during transport while still maintaining adequate hopper capacity for carrying asphalt
2Temperature
If a heating manifold system with chimneys is used, then heat distribution is improved, but heat loss to the environment increases
Solution Approach 1:
The heating manifold system incorporates local insulation at critical heat loss points such as the chimneys and manifold connections. This targeted insulation approach allows the system to maintain uniform asphalt temperature distribution while minimizing heat loss to the environment by protecting only the areas most susceptible to heat loss
3Stability of the object's composition
If the hopper base is widened for stability, then the centre of gravity is lowered improving stability, but the internal volume for asphalt storage is reduced
Solution Approach 1:
The inverted-V hopper design compensates for the reduced base volume by optimizing the vertical dimension and side wall angles. The tapered sides extend upward at optimized angles to maximize vertical storage capacity, thereby maintaining adequate hopper capacity while preserving the wider base configuration that lowers the centre of gravity and improves stability
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
This configuration reduces heat loss, increases stability during transport, and allows for efficient heating and recycling of asphalt, minimizing fuel usage and environmental impact.
Implementation Method 1
a heating manifold including a heating chamber adjacent to and positioned beneath the floor, the heating manifold adapted to be in fluid communication with a heater assembly and adapted to direct a heated gas emitted from the heater assembly through the heating chamber and heating manifold, wherein the volume of asphalt when in the asphalt hopper is heated through contact with the asphalt hopper
Implementation Method 2
direct a heated gas emitted from the heater assembly through the heating chamber and heating manifold
Data Source
AI summary
A portable asphalt heater and method for heating asphalt includes an asphalt hopper having a floor, first and second side walls and front and rear end walls. The side walls taper inwardly to define a substantially inverted-V geometry of the hopper. A heating manifold including a heating chamber is adjacent to and positioned beneath the floor, the heating manifold adapted to be in fluid communication with a heater assembly and to direct a heated gas emitted from the heater assembly through the heating chamber and heating manifold. A plurality of chimneys is in fluid communication with, and extends from, the heating chamber and along the first and second side walls, wherein the volume of asphalt, when in the asphalt hopper, is heated through contact with the asphalt hopper.