Infinitely Adjustable Air Seeder Valves for Precision Seeding
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Solution Overview
Problem
Current agricultural air seeders face challenges in efficiently seeding narrow strips of fields without wasting seed and fertilizer, as they often overlap and re-seed areas, leading to reduced yield and weed growth issues.
Innovation Solution
An air distribution apparatus with adjustable control valves that allow for intermediate positions between open and closed, paired with an exhaust system to maintain critical air velocity and prevent product loss when ports are closed, enabling precise control of product delivery to specific sections of furrow openers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional air seeders seed across the full width of the implement, then complete field coverage is achieved, but seed and fertilizer are wasted in overlap areas and previously seeded regions
Solution Approach 1:
The air seeder is divided into multiple independently controllable sections, each with its own manifold, ports, and control valves. This segmentation allows individual sections to be activated or deactivated based on the width of the field strip being seeded, preventing waste in overlap areas while maintaining complete coverage of the intended seeding width.
Solution Approach 2:
The system incorporates dynamically controllable ports with actuated control valves that can open or close based on real-time positioning data and field strip width. This dynamic adjustment allows the seeder to adapt its active seeding width to match the narrow field strip, eliminating the need to seed overlap areas while maintaining full coverage of the target area.
2Manufacturing precision
If control valves are provided only in fully open or fully closed positions, then simple binary control is achieved, but precise adjustment of product delivery rates is not possible
Solution Approach 1:
The control valves are designed with infinitely adjustable positions between fully open and fully closed states, allowing continuous modulation of product delivery rates. This dynamic positioning capability enables precise control of seed and fertilizer application rates in each section, accommodating variable rate application needs while maintaining manageable system complexity through standardized valve designs.
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 solution allows for improved sectional control and reduced waste by adjusting the rate of product flow and maintaining critical air velocity, ensuring efficient seeding and minimizing overlap, thereby optimizing seed and fertilizer usage.
Implementation Method 1
maintain critical velocity of the air stream
Implementation Method 2
exhaust a flow of pressurized air from the supply conduit
Implementation Method 3
adjustable control valves that allow for intermediate positions between open and closed... adjusting the rate of product flow
Implementation Method 4
a product air stream with agricultural products entrained therein
Data Source
AI summary
An air distribution apparatus including a manifold body having ports with a delivery conduit connected to each port. A port valve is configured to communicate an interior of the manifold body with the delivery conduit associated with each port. A supply conduit is connected at an output end thereof to the interior of the manifold body and connected at an input end thereof to receive a product air stream with entrained agricultural products. An exhaust orifice is defined in the supply conduit and an exhaust valve configured to control a flow of pressurized air from an interior of the supply conduit through the exhaust orifice. The port valve and exhaust valve are controlled to operate oppositely to each other between their open and closed positions. The port and exhaust valves are also adjustable to intermediate positions between the open and closed positions.