Grain Bin Hopper Bottom Manifold for Air Distribution
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Solution Overview
Problem
Existing hopper bottom designs for grain bins lack an efficient ventilation system that effectively distributes air throughout the bin to prevent spoilage and aid in the gravity discharge of particulate material.
Innovation Solution
A hopper bottom design featuring an inclined outer and inner wall with a manifold system for air distribution, where the manifold is coaxial with the walls and spans the full radius and circumference, distributing ventilation air radially and circumferentially, and releasing it through openings in the inclined inner wall to ventilate the stored material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manifold system is added to the hopper bottom to improve ventilation distribution, then ventilation efficiency is improved, but device complexity increases
Solution Approach 1:
The manifold system is nested within the hopper bottom structure itself, utilizing the space between the conical hopper walls and integrating the air distribution channels directly into the hopper geometry. This eliminates the need for separate external ventilation components while achieving comprehensive air distribution throughout the stored material.
2Reliability
If ventilation openings are provided across the full radius of the inclined inner wall to ventilate all particulate material, then ventilation coverage is improved, but manufacturing precision requirements increase
Solution Approach 1:
The ventilation openings are strategically distributed across the inclined inner wall at different radial positions to provide localized ventilation zones. Each opening serves a specific region of the stored material, ensuring comprehensive coverage while allowing for practical manufacturing tolerances in opening placement.
3Stability of the object's composition
If the manifold spans the full radius and distributes air in both radial and circumferential directions, then air distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The manifold system utilizes both radial and circumferential dimensions for air distribution by positioning openings at multiple angular positions around the hopper axis and at different radial distances from the center. This two-dimensional distribution pattern ensures uniform air delivery throughout the stored material volume while integrating smoothly with the conical hopper geometry.
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 design enhances ventilation efficiency, preventing spoilage by ensuring thorough air distribution across the stored particulate material, and aids in the gravity discharge process by using air to assist in the flow of material through the discharge chute.
Implementation Method 1
the manifold being arranged to distribute the ventilation air in a circumferential direction relative to the common upstanding axis; the manifold spanning a full radius of the inclined inner wall so as to distribute the ventilation air in a radial direction relative to the common upstanding axis
Implementation Method 2
a plurality of ventilation openings defined in the inclined inner wall so as to communicate the manifold with the interior of the grain bin to release the ventilation air upwardly into the interior of the grain bin
Implementation Method 3
the bottom end of the inclined outer wall defines a central discharge opening for gravity discharge of the particulate material stored in the grain bin
Data Source
AI summary
A hopper bottom for supporting a cylindrical side wall of a grain bin thereon comprises an outer wall arranged to be supported on a support surface and an inclined inner wall supported in spaced relation vertically above the outer wall, which has an inverted cone shape. A manifold or ducting is provided between the outer and inner walls for guiding air received from a blower between the outer and inner walls. Ventilation openings are provided across a full radius of the inner wall so that the air from the manifold is released upwardly to ventilate material received vertically above the hopper bottom. The manifold or ducting also is in fluidic communication with a discharge chute formed between openings in the inner and outer walls, through which the material passes on exit from the hopper bottom, to emit the air in an inward and downward direction to assist the gravity discharge.