Sealed Sprayer Liquid Circuit for Precise Drum-to-Tank Dosing
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Solution Overview
Problem
Existing agricultural sprayer systems lack precise dosing of liquid products from drums to main tanks, leading to potential over- or under-dosing, which can result in environmental issues and reduced crop yield.
Innovation Solution
A liquid circuit with a sealed transfer system, suction mechanism, dosing mechanism, and control unit that determines and controls the quantity of liquid product transferred, using displacement pumps and flowmeters to ensure accurate dosing, and includes a diversion channel for bypassing the dosing mechanism when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual valve operation is used for dosing liquid product, then the system is simple to operate, but the dosing precision is poor leading to over- or under-dosing
Solution Approach 1:
The patent replaces manual mechanical valve operation with an automated dosing mechanism controlled by electronic sensors and a control unit. The dosing mechanism uses a metering pump with variable displacement to precisely control liquid product flow, while sensors detect liquid levels and transfer quantities to enable automatic dosing calculations and execution.
Solution Approach 2:
The system performs self-monitoring and self-regulation through sensors that automatically detect liquid product levels in both the drum and main tank, calculate required dosing quantities, and control the dosing mechanism without manual intervention. The control unit continuously adjusts the dosing process based on real-time sensor feedback.
2Reliability
If manual dosing is used, then the device complexity is low, but the reliability of correct dosing is poor
Solution Approach 1:
The patent implements a closed-loop feedback system where sensors continuously monitor liquid product levels in the drum and main tank, feed this information to the control unit, which then adjusts the dosing mechanism to maintain precise dosing. The feedback ensures that the system automatically compensates for variations in transfer rates and drum emptying patterns.
Solution Approach 2:
The patent replaces unreliable manual dosing judgment with automated electronic control systems that precisely measure and control liquid product transfer quantities, ensuring consistent and accurate dosing regardless of operator skill or fatigue.
3Manufacturing precision
If precise dosing control is implemented, then dosing accuracy improves, but the device complexity increases
Solution Approach 1:
The patent employs a metering pump with variable displacement mechanism controlled by electronic actuators, allowing precise control of liquid product flow rates and volumes. The system integrates multiple sensors, a microprocessor-based control unit, and automated valve control to achieve high dosing accuracy.
Solution Approach 2:
The control unit performs multiple functions including monitoring liquid levels in both drum and main tank, calculating required dosing quantities, controlling the dosing mechanism, and managing the overall transfer process, thereby consolidating complexity into a single multi-functional controller.
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 precise dosing of liquid products, preventing over- or under-dosing and ensuring effective use of agricultural chemicals, thereby enhancing crop yield and environmental sustainability.
Implementation Method 1
a suction mechanism designed to suck the liquid product coming from the sealed transfer system and to discharge said liquid product to the main tank
Implementation Method 2
the dosing mechanism comprises a displacement pump arranged downstream from the sealed transfer system and upstream from the suction mechanism
Data Source
AI summary
The invention relates to a liquid circuit for an agricultural sprayer having a main tank, a sealed transfer system able to transfer a liquid product contained in a drum to the liquid circuit in a sealed manner, a suction mechanism designed to suck the liquid product coming from the sealed transfer system and to discharge said liquid product to the main tank, a dosing mechanism and a control unit designed to determine a quantity of liquid product to be provided to the suction mechanism for the filling of the main tank, and to control the dosing mechanism to provide the determined quantity of liquid product to the suction mechanism, in such a way as to meter the liquid product transferred from the sealed transfer system to the main tank.