Agricultural Spray System Valving for Uniform Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Agricultural machine spray systems face issues with uneven liquid product application due to inappropriate flow rates, precipitation of solids, and air trapping in dead-end spots, which complicates cleaning and control.
Innovation Solution
A valving arrangement and multiple liquid product lines are configured to connect spray nozzle assemblies in various ways, allowing for different modes of operation by controlling flow rates and directions, including flushing, to address these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the liquid product flow rate is increased to cover more area efficiently, then productivity is improved, but pressure drops occur which result in uneven application of liquid product
Solution Approach 1:
The spray system is divided into multiple independent product lines (first product line, second product line) with separate valving control. This segmentation allows different sections of the boom to be controlled independently, enabling high flow rates in some areas while maintaining pressure control in others, thus achieving both high productivity and uniform application.
Solution Approach 2:
The valving arrangement is configured to be selectively switchable between different states (first state, second state, third state), allowing dynamic adjustment of flow rates and pressure distribution. This dynamic control enables the system to adapt to different operating conditions, maintaining uniform application even at high productivity levels.
2Manufacturing precision
If the liquid product flow rate is decreased to maintain pressure control, then application uniformity is improved, but solids precipitate out which affects reliability
Solution Approach 1:
The system uses multiple product lines with independent valving to segment the flow control. This allows maintaining higher flow rates in lines where solids precipitation is a concern, while using lower flow rates in lines where pressure control is critical, thus maintaining both reliability and application uniformity simultaneously.
Solution Approach 2:
The valving arrangement enables selective change of flow rate parameters in different product lines. By adjusting flow rates independently in each line based on specific operational requirements, the system can prevent solids precipitation in high-flow lines while maintaining pressure control in low-flow lines.
3Device complexity
If traditional single product line configuration is used to simplify system structure, then device complexity is reduced, but dead-end spots are created which trap air and cause control problems
Solution Approach 1:
The product circuit is segmented into multiple lines with separate return paths for each line. This segmentation eliminates dead-end spots by providing continuous flow paths, preventing air trapping while maintaining relatively simple system structure through modular design.
Solution Approach 2:
The valving arrangement serves multiple functions: it controls spray operation, enables flushing of the product circuit, and manages air removal. This multi-functionality is achieved through a single integrated valving system that can be selectively switched between different states, avoiding the need for separate complex air management systems.
4Adaptability or versatility
If multiple product lines of different sizes are added to enable various flow rates and modes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The valving arrangement is designed as a universal control system that can selectively connect any product line to the pump, tank, or block flow. This single multi-functional valving system replaces what would otherwise require multiple separate control systems, achieving high adaptability while managing complexity through integration.
Solution Approach 2:
The system uses dynamically switchable valving that can reconfigure the product lines on-demand based on operational requirements. This dynamic reconfiguration capability provides high adaptability for different flow rates and modes without requiring physically separate systems for each configuration, thus managing complexity through software/control logic rather than hardware multiplication.
Data Source
AI summary
A spray system for an agricultural machine is configured to include a valving arrangement and multiple liquid product lines coupled to spray nozzle assemblies such that the valving arrangement can connect the product lines to the spray nozzle assemblies in different ways to achieve different modes of operation. Such modes can include providing agricultural liquid product flow through the spray nozzle assemblies at differing rates and/or flushing the product through the spray nozzle assemblies in differing directions. This can be achieved by controlling the valving arrangement to selectively connect any of the lines to pump for supplying product, to tank for returning product, or to block the lines to inhibit the flow of product. In one aspect, the product multiple lines can be of different sizes to enable more modes of operation, such as greater or lesser flow rates while spraying.