Agricultural Sprayer Nozzle Body Upstream Filter Arrangement
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Solution Overview
Problem
Existing nozzle bodies for agricultural crop protection sprayers suffer from clogging issues due to impurities reaching the filter and sieve elements, which are not effectively cleaned when the dosing and shut-off valve is closed, leading to downtime and malfunction.
Innovation Solution
The filter and sieve elements are rearranged to be located upstream of the dosing and shut-off valve in the discharge line, ensuring coarser particles are caught before reaching the valve and allowing for continuous flushing when the valve is closed, resulting in a compact design and reduced clogging risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the filter and sieve element are arranged between the metering/shut-off valve and the nozzle, then the nozzle can be positioned further away, but the nozzle body becomes very long and the filter cannot be flushed when the valve is closed
Solution Approach 1:
The filter and sieve element are inverted in position to be located upstream of the metering/shut-off valve in the dispensing line, rather than downstream as in conventional designs. This inversion allows the filter to be flushed when the valve is closed, preventing clogging while enabling a more compact nozzle body design.
Solution Approach 2:
The filter and sieve element are arranged in a different spatial dimension within the dispensing line, positioned upstream of the valve rather than downstream. This dimensional repositioning enables both compact nozzle body design and continuous flushing capability when the valve is closed.
2Ease of operation
If the application line branches off downwards in the lower section of the supply line, then the metering/shut-off valve can be positioned upstream, but prolonged closure causes liquid to stagnate and clog the filter and nozzle quickly
Solution Approach 1:
The filter and sieve element are positioned upstream of the metering/shut-off valve in the dispensing line, so that when the valve is closed, liquid flow continues to pass through the filter in the supply line, preliminarily flushing it and preventing clogging before the valve closure would cause stagnation.
Solution Approach 2:
The arrangement ensures continuous flushing action on the filter and sieve element even when the metering/shut-off valve is closed, maintaining liquid flow through the filter in the supply line to prevent stagnation and clogging, thereby sustaining the useful action of filtration without interruption.
3Productivity
If the filter and sieve element are positioned downstream of the valve, then the valve can control flow to the nozzle, but impurities reach the valve first causing malfunction
Solution Approach 1:
The filter and sieve element are inverted in position to be located upstream of the metering/shut-off valve in the dispensing line, rather than downstream as in conventional designs. This inversion ensures that impurities are filtered before reaching the valve, preventing malfunction while maintaining flow control efficiency.
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 arrangement prevents clogging of the dosing and shut-off elements, ensures reliable operation, and allows for a more compact nozzle body design with improved flushing of the filter and sieve elements, reducing downtime and maintaining efficient liquid dispensing.
Implementation Method 1
the respective filter and/or sieve element 15 arranged in the supply line 3 upstream of the respective metering and/or shut-off element 17 in the flow direction 21 of the liquid to be applied ensures, on the one hand, that at least the coarser particles of impurities in the liquid to be dispensed are retained before reaching the respective filter and/or sieve element
Implementation Method 2
the respective metering and/or shut-off element 17 is continuously flushed when closed, thus preventing clogging
Data Source
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AI summary
Nozzle body (13) for an agricultural crop protection sprayer, wherein the nozzle body has a housing (14) with at least one supply line (3), wherein at least one application line (18) branches off from the supply line (3) to at least one nozzle (8) arranged on the housing (14) of the nozzle body (13), wherein at least one filter and/or sieve element (15) and at least one metering and/or shut-off valve with an electromechanical actuating element, preferably a pulse width modulation valve, are arranged in the application line (18). In order to easily avoid the risk of clogging of the nozzle body (13), particularly in the area of the respective metering and/or shut-off valve (17) by the respective filter and/or sieve element (15), with a more compact design of the nozzle body (13),To significantly reduce the amount of wastewater, it is provided that at least one filter and/or sieve element (15) is located upstream of the metering and/or shut-off element (17) of the discharge line (18) in the direction of flow (16, 16A) of the liquid to be applied.