Variable Nozzle Rotary Sprinkler Arc Adjustment
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Solution Overview
Problem
Existing rotary irrigation sprinklers require cumbersome manual adjustments and multiple nozzle inserts to achieve matched precipitation rates for different arc settings, often resulting in mismatched precipitation for non-standard arcs, which can lead to inefficient water distribution.
Innovation Solution
A rotary sprinkler with a variable-shaped nozzle and automatic arc adjustment mechanism that automatically adjusts the nozzle shape and flow rate to match precipitation rates with the selected arc of rotation, including a split gate valve and nozzle purge mechanism to maintain optimal performance without disrupting the set precipitation rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple nozzle inserts are used for different arc settings, then matched precipitation rate can be achieved for standard arcs, but device complexity increases and ease of operation deteriorates due to manual removal and insertion
Solution Approach 1:
The nozzle is designed with a variable opening that can dynamically adjust its effective area based on the selected arc setting. A flow control member moves relative to the nozzle outlet to change the opening shape and size, allowing the single nozzle to adapt to different arc requirements without manual replacement.
Solution Approach 2:
The precipitation rate is controlled by changing the physical parameter of the nozzle opening area. As the arc setting changes, the flow control member adjusts the nozzle opening area proportionally, maintaining matched precipitation rate through parameter adjustment rather than physical nozzle replacement.
2Adaptability or versatility
If arc adjustment mechanism is added to change rotation arc, then adaptability improves for different coverage areas, but device complexity increases
Solution Approach 1:
The flow control member serves multiple functions: it controls the flow rate of water, adjusts the nozzle opening area, and links to the arc adjustment mechanism to coordinate precipitation rate matching. This multi-functionality reduces the need for separate components.
Solution Approach 2:
The flow control member acts as an intermediary between the arc adjustment mechanism and the nozzle opening. It translates the arc setting changes into corresponding changes in flow rate and opening area, mediating the relationship between mechanical adjustment and fluid dynamics.
3Manufacturing precision
If nozzle opening area is reduced to match precipitation rate, then water distribution uniformity improves, but fluid flow decreases
Solution Approach 1:
The system changes the parameter of nozzle opening area in direct proportion to the arc setting. When arc increases, opening area increases to maintain matched precipitation rate, allowing both uniform distribution and adequate flow rate to be achieved simultaneously through coordinated parameter adjustment.
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 efficient and uniform water distribution across various arc settings without the need for manual nozzle changes, ensuring consistent precipitation rates and easy nozzle purging without affecting the set irrigation pattern.
Implementation Method 1
One common mechanism uses a water-driven turbine and a gear reduction system to convert the high speed rotation of the turbine into relatively low speed turret rotation.
Implementation Method 2
When the irrigation cycle is completed, the pressurized water supply is shut off and the riser is spring-retracted back into the stationary housing.
Data Source
AI summary
A rotary sprinkler including a rotatable nozzle turret with automatic matched precipitation to an arc of rotation, a nozzle purge feature, and/or a flow shut off valve coupled to a variable flow nozzle outlet.