Quick Change Nozzle Side Insertion Latching Mechanism
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Solution Overview
Problem
Current irrigation sprinkler nozzles are difficult to replace due to their positioning, which makes it hard to grip and remove them, especially when they are threadedly attached or press-fitted, requiring cumbersome unscrewing and handling.
Innovation Solution
A rapid change nozzle design that allows for side insertion and removal using a lever action to snap in and out of the sprinkler outlet, featuring a protrusion or tongue that fits into a recessed area and latching arms with handles for easy alignment and locking, utilizing an O-ring seal for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nozzles are threadedly attached or press-fitted to the sprinkler head, then the nozzle attachment is secure and reliable, but the nozzle becomes difficult to grip and remove, requiring cumbersome unscrewing and handling
Solution Approach 1:
The nozzle assembly is segmented into distinct functional components: a nozzle body, a separate cover, and integrated latching arms. This segmentation allows the cover to be rotated independently to engage latching mechanisms, providing secure attachment while maintaining ease of removal through the rotating cover action.
Solution Approach 2:
The latching mechanism transitions from a static threaded or press-fitted connection to a dynamic system where the cover rotation actively engages and disengages latching arms. This dynamic action allows the nozzle to be securely locked during operation but easily removed by reversing the rotation, resolving the contradiction between secure attachment and ease of removal.
2Reliability
If nozzles are positioned for secure attachment, then the nozzle connection is firm and reliable, but the nozzle cannot be gripped easily to unscrew or pull out the nozzle
Solution Approach 1:
The cover acts as an intermediary element between the user's hand and the nozzle body. Instead of gripping the nozzle body directly (which is difficult due to its secure positioning), the user rotates the cover, which then actuates the latching arms. This intermediary action provides mechanical advantage and easy gripping while maintaining firm nozzle connection.
Solution Approach 2:
The latching mechanism operates in a different dimensional space than the nozzle connection itself. The latching arms engage from the side through the cover rotation, providing a separate degree of freedom for attachment and removal that does not interfere with the axial nozzle connection firmness.
3Productivity
If a rapid change nozzle design is implemented with side insertion, then nozzle replacement speed is improved, but the latching mechanism complexity increases
Solution Approach 1:
Multiple functions are merged into the cover component: it serves as both the access cover and the actuator for the latching mechanism. The rotation of the single cover simultaneously performs the functions of opening access, engaging latching arms, and locking the nozzle in place, achieving rapid replacement without excessive complexity.
Solution Approach 2:
The latching mechanism is designed to be self-actuating through the cover rotation. The geometry of the latching arms and their engagement surfaces automatically engages or disengages based on the cover's rotational position, eliminating the need for separate actuators, springs, or complex control mechanisms while maintaining rapid replacement capability.
Data Source
AI summary
An irrigation sprinkler apparatus has a rapid change nozzle which allows the changing of a nozzle without the use of tools or any disassemble of the sprinkler head. The rapid change nozzle slides into a window in the side of the sprinkler head and latches into place.