Sprinkler Riser Lock Unit for Nozzle Service
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Solution Overview
Problem
Pop-up irrigation sprinklers require manual effort and difficulty to maintain or replace the spray nozzle due to the need to hold the riser against the retraction spring, especially when only one hand is available for cleaning or replacing the nozzle, as the riser must be released and regrasped to access the nozzle for service.
Innovation Solution
A riser lock unit with an L-shaped base and open-sided plates that retains the riser in an elevated position, allowing easy access to the spray nozzle for maintenance or replacement, and can be quickly removed to allow normal spring-loaded retraction into the sprinkler housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual grasping and lifting of the riser is performed for nozzle service, then the spray nozzle can be accessed for cleaning or replacement, but the operation becomes difficult and time-consuming due to the retraction spring force
Solution Approach 1:
The riser lock unit is installed on the riser before performing nozzle service, preliminarily securing the riser in the elevated position. This preliminary action eliminates the need to manually struggle against the retraction spring during nozzle removal and installation, directly resolving the contradiction by making the operation easy and time-efficient.
Solution Approach 2:
The riser lock unit acts as an intermediary device between the riser and the service personnel. It provides a mechanical interface that holds the riser stationary, allowing easy access to the nozzle without directly opposing the retraction spring force, thus resolving the operational difficulty and time loss.
2Ease of operation
If the riser is released during nozzle cleaning, then both hands can be used for cleaning the nozzle, but the riser must be regrasped and pulled back toward the elevated position before remounting the nozzle
Solution Approach 1:
The riser lock unit is installed before nozzle removal, preliminarily securing the riser in the elevated position. This allows the technician to release the riser completely for two-handed nozzle cleaning without having to manually regraip and pull the riser back, eliminating the complex manipulation steps while maintaining ease of cleaning.
Solution Approach 2:
The riser lock unit serves as an intermediary that decouples the riser from manual manipulation during cleaning operations. It provides a stable, hands-free holding mechanism that allows complete release of the riser for cleaning while automatically maintaining position, reducing the complexity of manipulation required.
3Productivity
If the riser is held in the elevated position during nozzle replacement, then the nozzle can be easily removed and installed, but the riser must be manually manipulated against the retraction spring
Solution Approach 1:
The riser lock unit is installed on the riser before beginning nozzle replacement operations. This preliminary securing action holds the riser in the elevated position throughout the entire replacement process, enabling fast nozzle removal and installation while completely eliminating the need for manual riser manipulation against the retraction spring, thus resolving both productivity and ease of operation.
Solution Approach 2:
The riser lock unit acts as an intermediary that provides automated positioning of the riser during nozzle replacement. It eliminates the need for manual manipulation by providing a mechanical holding function, thereby increasing replacement speed while maintaining operational ease.
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
Facilitates quick and easy access to the spray nozzle for service or replacement without manual struggle, enabling efficient maintenance and operation of the sprinkler system.
Implementation Method 1
the retraction spring returns the riser back to the normal retracted position disposed substantially within the sprinkler housing
Implementation Method 2
The water pressure causes the riser to move against a retraction spring from a normal retracted position concealed substantially within the sprinkler housing to an elevated position projecting upwardly from the sprinkler housing
Data Source
AI summary
A riser lock unit is provided for quick and easy mounting onto an elevated sprinkler riser. The riser lock unit functions to retain or maintain the sprinkler riser in an elevated position, without normal spring-loaded retraction into an underlying sprinkler housing, to facilitate service and/or replacement of a sprinkler nozzle head mounted at the upper end of the riser. When desired, the riser lock unit is quickly and easily removed from the sprinkler riser.