Variable Arc Sprinkler Head With Helical Flow Control
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Solution Overview
Problem
Conventional irrigation sprinklers lack flexibility in adjusting water distribution arcs and flow rates, leading to inefficient watering due to limited adjustability, which can result in overwatering or underwatering, and often require the use of hand tools for adjustments.
Innovation Solution
A sprinkler head design that allows for adjustable water distribution arcs from 0 to 360 degrees without the need for hand tools, featuring a direct actuation mechanism and a flow rate adjustment valve, enabling users to set the arc and flow rate independently, with a lock-out feature to prevent accidental changes and a self-flushing mechanism to clear debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional sprinkler heads with fixed arc patterns are used, then manufacturing is simple and reliable, but adaptability to different irrigation needs is limited
Solution Approach 1:
The patent implements a dynamic adjustment mechanism that allows the water distribution arc to be changed from fixed to variable. The arc adjustment valve and rotatable deflector enable the sprinkler to adapt its coverage pattern in real-time, transforming a static device into a dynamic one that can respond to different irrigation requirements.
Solution Approach 2:
The sprinkler head is designed with multiple functions integrated into a single device: arc adjustment capability, flow rate control, lock-out prevention, and self-flushing. This multi-functionality allows one universal sprinkler model to replace multiple specialized models, providing adaptability without proportionally increasing complexity.
2Adaptability or versatility
If interchangeable pattern inserts are used to select water distribution arcs, then adaptability is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The arc adjustment mechanism is designed to be self-operating through direct actuation. The user can adjust the arc by simply rotating the deflector without needing separate tools or complex procedures, making the system serve itself through intuitive user interaction.
Solution Approach 2:
The patent extracts the arc selection function from complex interchangeable inserts and implements it through a simplified rotational mechanism. The deflector can be rotated to different positions to select various arc patterns, eliminating the need for multiple physical inserts while maintaining adaptability.
3Device complexity
If punch-outs are used to set fixed water distribution arc, then device complexity is reduced, but adaptability and ease of operation worsen
Solution Approach 1:
Instead of fixed punch-out configurations, the patent implements a dynamic rotational mechanism that allows continuous adjustment of the water distribution arc. The deflector can be rotated to any position within a range, providing flexibility that discrete punch-outs cannot achieve while maintaining mechanical simplicity.
4Device complexity
If limited arcuate range sprinklers are used, then device complexity is reduced, but adaptability worsens leading to overwatering or underwatering
Solution Approach 1:
The patent enables parameter changes by allowing adjustment of the water distribution arc within a substantial continuum range. Users can modify the arc parameter to match specific terrain requirements, preventing both overwatering and underwatering conditions that occur with fixed-range sprinklers.
5Adaptability or versatility
If flow rate adjustment device is added to control throw radius, then adaptability is improved, but device complexity increases
Solution Approach 1:
The flow rate adjustment valve is merged with the existing arc adjustment mechanism and other features into an integrated control system. Multiple adjustment functions are combined in a unified valve assembly, reducing overall complexity compared to having separate mechanisms for each function.
6Device complexity
If hand tools are required for arc adjustment, then device complexity is reduced, but ease of operation worsens
Solution Approach 1:
The arc adjustment mechanism is designed for self-service operation without external tools. The deflector can be directly rotated by hand to adjust the water distribution arc, eliminating the need for screwdrivers or other hand tools and significantly improving ease of 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
The design provides a highly customizable and efficient water distribution system that prevents overwatering or underwatering, allows for easy adjustments without tools, and maintains set parameters, ensuring uniform irrigation coverage and reducing maintenance needs.
Implementation Method 1
one or more jets of water are generally directed upwardly against a rotatable deflector having a vaned lower surface defining an array of relatively small flow channels extending upwardly and turning radially outwardly with a spiral component of direction. The water jet or jets impinge upon this underside surface of the deflector to fill these curved channels and to rotatably drive the deflector.
Implementation Method 2
a spring mounted on the shaft for urging the valve member into sealing engagement with the valve seat
Implementation Method 3
The valve member and the nozzle cover have corresponding helical engagement surfaces that cam against one another to open or close the valve as the cap is rotated.
Data Source
AI summary
A variable arc sprinkler head or nozzle may be set to numerous positions to adjust the arcuate span of the sprinkler. The sprinkler head includes an arc adjustment valve having two portions that helically engage each other to define an opening that may be adjusted at the top of the sprinkler to a desired arcuate length. The arcuate length may be adjusted by pressing down and rotating a deflector to directly actuate the valve. The sprinkler head may include a lock-out feature to prevent adjustment. A method of irrigation is also provided involving moving the deflector between an arc adjustment position and an operational, irrigation position. The sprinkler head may also include a flow rate adjustment valve that may be adjusted by actuation of an outer wall of the sprinkler. Rotation of the outer wall causes a flow control member to move axially to or away from an inlet.