Hopper Bottom Manifold for Grain Bin Aeration
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Solution Overview
Problem
Existing grain storage bins require extensive ducting or multiple blowers to achieve even ventilation, which is costly and complex, especially when trying to communicate ventilation air through the hopper cone of particulate material storage bins.
Innovation Solution
A hopper bottom design featuring a conical wall with a cylindrical outer rim, supported by legs, and an annular manifold passage that directs aeration air evenly around the perimeter, incorporating vent openings and a cover member to manage airflow efficiently, while also serving as a structural reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive ducting and multiple blowers are used to achieve even ventilation, then aeration distribution is improved, but device complexity and cost increase
Solution Approach 1:
The conical hopper wall is segmented with multiple vertically spaced perforations that distribute air at different heights, creating zones of aeration throughout the grain mass. This segmentation replaces the need for extensive ducting by using the conical surface itself as the distribution medium.
Solution Approach 2:
The conical hopper wall serves multiple functions: it provides the structural shape for grain flow, acts as the aeration distribution surface through integrated perforations, and eliminates the need for separate ducting systems. This multi-functionality reduces device complexity while maintaining effective ventilation.
2Reliability
If multiple blowers are used to achieve even ventilation, then aeration distribution is improved, but device complexity and cost increase
Solution Approach 1:
Multiple air distribution functions that would traditionally require multiple blowers are merged into a single blower system. The single blower supplies air to a manifold that distributes it vertically through the conical wall perforations, achieving even aeration distribution without the complexity of multiple blowers.
Solution Approach 2:
A vertical manifold acts as an intermediary between the single blower and the conical wall perforations. The manifold distributes air at different heights along the conical surface, enabling even aeration distribution while using only one blower instead of multiple units.
3Ease of operation
If conventional ducting is used to communicate ventilation air through the hopper cone, then ventilation is achieved, but manufacturing cost and complexity increase
Solution Approach 1:
The conical hopper wall is directly perforated at specific locations to provide ventilation, rather than installing separate ducting systems. This local modification of the existing structure achieves ventilation functionality while significantly reducing manufacturing complexity and cost.
Solution Approach 2:
The conical hopper structure serves its own ventilation needs through integrated perforations in its wall, eliminating the need for external ducting systems. The structure provides both its containment function and its aeration function, reducing overall system complexity.
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 provides a simple, cost-effective method for even aeration distribution and structural support, reducing the need for extensive ducting and multiple blowers, ensuring efficient ventilation and stability for large volume grain bins.
Implementation Method 1
a manifold passage bounded by the conical wall, the outer wall and the bottom wall which is generally annular in shape and which is located externally of the conical wall; a plurality of vent openings formed in an upper portion of the conical wall in communication from the manifold passage to an interior of the conical wall
Data Source
AI summary
A hopper bottom a grain bin above a foundation includes a conical wall tapering inwardly to a bottom discharge opening. An outer cylindrical wall is joined to the top peripheral edge of the conical wall. Upright support legs are connected to the outer wall for supporting the cylindrical grain bin walls thereabove. A bottom wall is connected radially between the outer wall and the conical wall so as to define a manifold passage bounded by the conical wall, the outer wall and the bottom wall which is generally annular in shape and which is located externally of the conical wall. Vent openings are formed in the conical wall to receive aeration air from a blower connected to the manifold passage. A cover member is supported above the vent openings in the conical wall in connection with the outer wall above the conical wall to prevent material entering the vent openings.