Pneumatic Seed Feeding Device with Local Airflow Regulation
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Solution Overview
Problem
Existing seed distribution systems face challenges in efficiently supplying seeds to multiple auxiliary tanks, especially when they are positioned far from the main tank, leading to issues like seed overflow and loss of precision due to varying air flow requirements, which increases costs and complicates the number of auxiliary tanks needed.
Innovation Solution
A self-regulating pneumatic supply device with adjustable air flow and a regulation system for each auxiliary tank, featuring a sensor and valve to control air flow based on filling levels, ensuring individual and precise seed distribution regardless of tank position or number, using a single air flow and preventing overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If airflow is increased to transport seeds to distant auxiliary hoppers, then seed transport capability is improved, but seed overflow occurs in auxiliary hoppers near the main hopper and placement accuracy deteriorates
Solution Approach 1:
The air supply system is segmented into multiple independent sources: a main air source for distant hoppers and individual auxiliary air sources for each auxiliary hopper. This segmentation allows each hopper to receive appropriately sized airflow independent of others, preventing overflow while maintaining transport capability to distant locations.
Solution Approach 2:
Each auxiliary hopper is equipped with its own air source and control valve, creating localized air supply quality tailored to each hopper's specific distance and requirements. This local quality control prevents uniform over-suppression that would cause overflow in near hoppers while ensuring sufficient supply to distant hoppers.
2Productivity
If the number of auxiliary hoppers is increased, then distribution capacity is improved, but airflow management complexity and cost increase
Solution Approach 1:
The system uses a universal modular design where each auxiliary hopper is equipped with the same type of air source and control valve assembly. This universality allows the system to scale to any number of hoppers without increasing complexity per unit, as each module functions independently and identically.
Solution Approach 2:
Each auxiliary hopper has its own air source and control valve that automatically regulates airflow based on local conditions. This self-service capability eliminates the need for complex centralized airflow management, allowing the system to handle any number of hoppers with simple individual control rather than complex collective control.
3Device complexity
If a single airflow system is used for all auxiliary hoppers, then system simplicity is improved, but accurate seed distribution to each hopper cannot be ensured
Solution Approach 1:
Individual control valves are introduced as intermediary devices between the air sources and each auxiliary hopper. These valves act as mediators that simplify the overall system architecture while enabling precise local control of airflow to each hopper, achieving both simplicity and accuracy.
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 efficient and precise seed distribution to a large number of auxiliary tanks without overflow, maintaining accuracy and reducing costs by adapting air flow according to filling levels, regardless of tank position or product type, enabling the use of multiple distributors without additional air flows.
Implementation Method 1
The fan (6) supplies a compressed airflow that extracts the product from the main tank (2) and delivers it to the auxiliary tanks (4) via their respective sealed conduits (5)
Implementation Method 2
Product accumulation in the auxiliary tank (4) causes a pressure drop that sufficiently slows the airflow in the sealed conduit (5) to prevent further product transport
Data Source
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AI summary
The present invention relates to a feeding device (1) for a single-grain seed drill via a flow of air from a main reservoir (2) containing product to at least one auxiliary reservoir (4) depending on its filling rate, each auxiliary reservoir (4) being connected to said main reservoir (2) by a respective leaktight duct (5), the number of auxiliary reservoirs (4) corresponding to the number of dispensers (3) of said single-grain seed drill. The feeding device is noteworthy in that a regulating system (16) is connected to each auxiliary reservoir (4) and in that said regulating system (16) has a sensor (17) for detecting the level of product and a valve (18) for regulating the flow of air in said corresponding auxiliary reservoir (4). The present invention also relates to a single-grain seed drill using a feeding device according to the invention.