Agricultural Sprayer Valve Unit With Passive Overflow Drip Protection
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Solution Overview
Problem
Agricultural sprayer valve units face challenges in operational safety, drip protection, and clogging detection, particularly when there is no electric bias or during power failures, as they cannot maintain a reliable open position without electric energization, leading to potential fluid leakage or blockage.
Innovation Solution
The integration of an electronically controlled control valve and a passive overflow valve in series, where the electronically controlled control valve can maintain positions without electric bias, and the passive overflow valve ensures drip protection by opening only when the pressure threshold is met, with the option to detect clogging through electric bias analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electronically controlled control valve is used to maintain open position without electric bias, then operational safety is improved, but device complexity increases
Solution Approach 1:
The valve unit is divided into two independent valves: an electronically controlled control valve and a passive overflow valve. Each valve handles specific functions separately, allowing the control valve to maintain open position without electric bias while the overflow valve provides passive drip protection, thus improving reliability without excessively complicating the overall system.
Solution Approach 2:
The passive overflow valve acts as an intermediary safety mechanism that activates only when pressure exceeds a threshold. It provides automatic drip protection without requiring electric power or complex control systems, complementing the electronically controlled valve and enhancing operational safety with minimal added complexity.
2Reliability
If a passive overflow valve is added for drip protection, then reliability is improved, but device complexity increases
Solution Approach 1:
The passive overflow valve is designed to automatically activate when fluid pressure exceeds a predetermined threshold, providing drip protection without requiring external control signals or electric power. This self-regulating mechanism improves reliability by ensuring drip protection even during power failures or electronic system malfunctions.
Solution Approach 2:
The passive overflow valve serves as a simple, fail-safe component that can be easily replaced if needed. Its straightforward mechanical design with a valve body, valve seat, and spring makes it a cost-effective addition that enhances drip protection without significantly increasing overall device complexity or maintenance burden.
3Measurement precision
If electric bias is used to maintain valve position, then control precision is improved, but reliability deteriorates during power failures
Solution Approach 1:
The passive overflow valve is pre-configured with a spring mechanism and valve seat that automatically activate when pressure exceeds the threshold, regardless of electric power availability. This preliminary mechanical setup ensures that drip protection is always in place as a backup, maintaining reliability during power failures while the electronic control valve provides precise control when powered.
Solution Approach 2:
The system incorporates a redundant passive overflow valve that acts as a cushion or backup protection mechanism. This valve is designed to activate beforehand when pressure conditions indicate potential dripping, providing a safety net that compensates for the loss of electric bias control during power failures and ensures continuous reliable operation.
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 configuration enhances operational safety by preventing leakage and ensuring reliable fluid flow, even without electric bias, and allows for effective clogging detection and compensation, maintaining efficient output control.
Implementation Method 1
one valve position (in particular an open position or a closed position) can be upheld and/or changed by a holding magnet
Implementation Method 2
the passive overflow valve ensures drip protection by opening only when the pressure threshold is met
Data Source
AI summary
The invention relates to an agricultural sprayer valve unit. An electronically controlled control valve and a passive overflow valve serially connected in fluid communication are arranged in the agricultural sprayer valve unit between a primary line and a secondary line. The agricultural sprayer valve unit may be used for any agricultural sprayer valve device, in particular in connection with the discharge of a fluid such as water, a fertilizer, an insecticide, a weedkiller and the like in agricultural or fruit or vegetable cultivation.