Hopper Bottom Manifold Duct for Grain Bin Aeration
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Solution Overview
Problem
Existing grain storage bins with hopper bottoms require extensive ducting and multiple blowers to achieve even aeration, which can be cumbersome and inefficient.
Innovation Solution
A hopper bottom design featuring an inverted cone shape with a manifold duct system that directs air upwardly through circumferentially spaced outlet openings, supported by upright members and a blower, allowing for unobstructed access and even aeration distribution within the bin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive ducting and multiple blowers are used to achieve even aeration, then aeration coverage is improved, but device complexity increases
Solution Approach 1:
The aeration system is segmented into multiple outlet openings distributed around the hopper bottom perimeter, with each opening serving as an independent aeration zone. This segmentation allows even air distribution across the entire hopper bottom without requiring extensive interconnected ducting, as each segment receives air directly from the manifold duct.
Solution Approach 2:
The manifold duct serves multiple functions simultaneously: it acts as the primary air distribution conduit, supports multiple outlet openings for widespread aeration coverage, and distributes air evenly across all outlet openings through its circumferential passage. This multi-functionality eliminates the need for separate ducting systems for each outlet, reducing overall system complexity.
2Reliability
If multiple blowers are used to achieve even aeration, then aeration distribution is improved, but ease of operation deteriorates
Solution Approach 1:
Multiple aeration functions that would traditionally require multiple separate blowers are merged into a single blower system. The manifold duct distributes air from one blower to multiple outlet openings, achieving even aeration distribution without the operational complexity of coordinating multiple blowers. This unified system is easier to operate and control.
3Reliability
If ducting is placed within the hopper wall, then aeration coverage is improved, but ease of manufacture deteriorates
Solution Approach 1:
Instead of placing ducting within the hopper wall (radial dimension), the manifold duct is positioned above the hopper wall in the vertical dimension. This dimensional change allows the duct to extend circumferentially around the hopper bottom without interfering with the hopper wall structure, simplifying manufacturing while maintaining comprehensive aeration coverage through multiple outlet openings.
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 design enhances aeration efficiency by providing unobstructed access and even air distribution, reducing the need for extensive ducting and multiple blowers, thereby simplifying the aeration process in grain storage bins.
Implementation Method 1
a blower in communication with the manifold passage so as to be arranged to direct ventilation air from the blower and into the grain bin through the manifold passage
Implementation Method 2
a hopper wall having an inverted cone shape so as to taper downwardly and inwardly from a peripheral edge at a top end of the hopper wall to a central opening at a bottom end of the hopper wall
Data Source
AI summary
A hopper bottom for supporting a cylindrical side wall of a grain bin includes a hopper wall having an inverted cone shape supported on upright support legs. A manifold duct is supported above the hopper wall to define a manifold passage therein extending circumferentially adjacent to the peripheral edge of the hopper wall. A plurality of outlet openings formed in the manifold duct in communication from the manifold passage to an interior of the hopper wall for open communication with the grain bin thereabove. An inlet opening extending through the hopper wall in alignment with the manifold duct receives ventilation air from a blower to direct the flow through the manifold duct and into the grain bin through the outlet openings of the manifold duct.