Modular Aeration Duct Network for Hopper Bin Installation
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Solution Overview
Problem
Hopper bottom grain bin aeration duct systems face challenges in installation within existing bins due to limited access openings and the need for increased perforated wall area without obstructing grain flow.
Innovation Solution
An aeration duct apparatus comprising a plurality of aeration tubes and hollow connectors with multiple connection ports, forming a rigid structure that can be easily assembled inside the bin through small openings, allowing for adjustable perforated wall area and air flow, with a transition duct connected to a fan for efficient air distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If vertical tubes with concentric perforated inner and outer walls are used to increase perforated wall area, then the perforated area is increased, but the system becomes difficult to install in existing bins with limited access openings
Solution Approach 1:
The aeration system is divided into multiple separate aeration tubes that can be individually inserted through access openings, rather than requiring installation of large integrated structures. Each tube can be independently positioned and connected, enabling installation in existing bins with limited access.
Solution Approach 2:
The invention transitions from vertical concentric tubes to a three-dimensional network of tubes extending in multiple directions (horizontal and vertical) throughout the grain mass. This spatial distribution increases perforated area while maintaining small individual components that can be installed through limited openings.
2Area of stationary object
If a large perforated floor area or horizontal tube network is provided, then sufficient airflow area is achieved, but this approach is not suitable for hopper bottom bins with sloping floors
Solution Approach 1:
The aeration tube network is designed to adapt to the dynamic geometry of hopper bottom bins with sloping floors. Tubes can be positioned at various angles and depths to follow the grain flow patterns and floor slope, rather than requiring a fixed horizontal configuration.
Solution Approach 2:
Different regions of the bin receive tailored aeration tube configurations based on local requirements. The tube network density and orientation can be varied to match the sloping floor geometry and grain storage characteristics in different zones of the hopper bottom bin.
3Productivity
If the perforated duct area is increased to reduce back-pressure, then airflow efficiency is improved, but the device complexity increases
Solution Approach 1:
The aeration tubes utilize the natural pressure differential created by the fan and grain column to drive airflow through the perforations. The system design allows air to naturally distribute through the tube network without requiring complex pressure regulation mechanisms, achieving efficient airflow through passive design.
Solution Approach 2:
Multiple aeration tubes are connected to form an integrated network that shares a common air supply from a single fan through a transition duct. This merging of multiple tubes into a unified system achieves high total perforated area while avoiding the complexity of multiple independent duct systems.
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
Enables easy installation and adjustment of aeration ducts in hopper bottom bins, ensuring efficient airflow without obstructing grain discharge, and accommodating varying bin sizes and air flow rates.
Implementation Method 1
air flows out the perforated sides and out the open bottom and upward through the grain in the bin
Data Source
AI summary
An aeration duct apparatus has a plurality of aeration tubes connected together by hollow connectors, each hollow connector defining at least three connection ports. Each aeration tube is connected at each tube end thereof to one of the connection ports, and each connection port is connected to a tube end such that the connected aeration tubes and hollow connectors form a substantially rigid structure. A transition duct is connected to one of the aeration tubes at an inside end thereof and is adapted at an outside end thereof for attachment to a fan. The aeration tubes and transition duct are configured such that air can flow from the fan through the transition duct into each aeration tube and out through a perforated area of walls of the aeration tubes.