Offset Ball Valve Flow Control for Variable Row-Unit Liquid Application
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Solution Overview
Problem
Existing agricultural systems face challenges in controlling and monitoring liquid applications across different row units of planters, leading to inefficiencies in fertilizer and chemical distribution.
Innovation Solution
The implementation of a control and monitoring unit (CMU) with an offset ball valve and dual passages, allowing for variable flow rates and precise monitoring through flow meters, enabling independent control of each row unit and wide operating ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single flow path is used for liquid application, then the device structure is simple, but the control precision and monitoring capability are insufficient
Solution Approach 1:
The flow device is divided into multiple independent passages (first passage, second passage, third passage) that can be selectively activated. Each passage can be controlled independently through the offset ball valve mechanism, allowing precise monitoring and control of liquid flow to different row units while maintaining a modular structure that doesn't overly complicate the overall device.
Solution Approach 2:
The offset ball valve mechanism serves multiple functions simultaneously: it controls flow distribution to different passages, enables monitoring through integrated flow meters, and allows selective activation of specific row units. This multi-functional design improves measurement and control precision without proportionally increasing device complexity.
2Adaptability or versatility
If a single flow rate is applied to all row units, then the control system is simple, but the adaptability to different field conditions is reduced
Solution Approach 1:
The offset ball valve mechanism enables dynamic control of liquid flow distribution, allowing the system to adapt flow rates to different row units based on real-time field conditions. The valve can be positioned to direct liquid to specific passages, creating a dynamically adjustable control system that responds to varying agricultural needs without requiring a completely complex control architecture.
Solution Approach 2:
Different passages can be assigned to different row units, allowing each unit to receive customized liquid application rates based on local field conditions such as soil nutrient variations. This local quality approach enables adaptability across the field while maintaining a relatively simple overall control system through the unified offset ball valve mechanism.
3Measurement precision
If liquid flow is not monitored separately for each passage, then the device is simpler, but the monitoring precision and resource efficiency are reduced
Solution Approach 1:
Flow meters are integrated into each passage to provide real-time feedback on liquid flow rates. This feedback mechanism enables precise monitoring of liquid distribution to different row units, allowing the system to adjust flow rates accordingly and ensure accurate application rates. The feedback from each passage's flow meter contributes to overall resource efficiency and distribution accuracy.
Solution Approach 2:
The monitoring system is segmented into independent flow meters for each passage, allowing separate measurement and control of liquid flow to different row units. This segmentation enables precise monitoring of each unit's liquid reception, improving overall measurement precision and resource efficiency without creating an overly complex integrated monitoring system.
Data Source
AI summary
Described herein are systems and devices for controlling and monitoring liquid applications of agricultural fields. In one embodiment, a flow device for controlling flow during an agricultural operation includes an offset ball valve having multiple openings that rotate in position to control flow of a liquid through the offset ball valve to an outlet passage. The flow device also includes a first passage that provides a first flow path from an inlet to at least one opening of the offset ball valve and second passage that provides a second flow path from the inlet to at least one opening of the offset ball valve.