Hydrant Nozzle Cap Spacer for Antenna Indexing and Drainage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fire hydrant nozzle caps often face issues with leak detection system antenna orientation and pressure relief, where the gasket can block water drainage from the nozzle cap, preventing pressure reduction and indicating incomplete valve closure.
Innovation Solution
A nozzle cap spacer with a resilient spring arm is introduced to adjust the rotational indexing of the nozzle cap relative to the nozzle connector, allowing for proper antenna orientation and pressure relief while maintaining seal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasket is used to seal the nozzle cap with the nozzle, then seal integrity is improved, but the gasket resiliently deforms into the leak path blocking water drainage and preventing pressure reduction
Solution Approach 1:
A spacer is introduced as an intermediary component between the gasket and the leak path. The spacer has a body portion that contacts the gasket and a spring arm that contacts the leak path, preventing the gasket from deforming into the leak path while maintaining seal integrity. This mediator resolves the contradiction by allowing the gasket to remain resilient for sealing while blocking its deformation into the drainage path.
Solution Approach 2:
The sealing system is segmented into multiple functional components: the gasket for sealing, the spacer for preventing deformation, and the spring arm for maintaining contact with the leak path. This segmentation allows each component to perform its specific function without interfering with others, resolving the contradiction between seal integrity and pressure buildup prevention.
2Reliability
If the nozzle cap is rotated to adjust antenna orientation, then signal transmission is improved, but the rotational indexing may misalign the nozzle cap with the nozzle connector
Solution Approach 1:
The spacer is pre-installed on the nozzle connector before attaching the nozzle cap. The spacer's body portion and spring arm are positioned in advance to define specific rotational indexing positions. This preliminary action allows the nozzle cap to be rotated for optimal antenna orientation while the spacer ensures proper alignment is maintained, resolving the contradiction between signal transmission and rotational alignment.
Solution Approach 2:
The spacer acts as a mediator between the nozzle cap and nozzle connector, providing a reference structure that defines both the rotational indexing for alignment and the positioning for antenna orientation. This intermediary component allows simultaneous optimization of both signal transmission and manufacturing precision.
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 spacer enables effective adjustment of the nozzle cap's rotational indexing, ensuring proper antenna orientation and pressure relief, facilitating leak detection and preventing water accumulation, thus addressing the issue of incomplete valve closure.
Implementation Method 1
a resilient first spacer spring arm extending from the outer body edge, wherein the first spacer spring arm is biased away from the spacer body in an extended orientation
Data Source
AI summary
Example aspects of a nozzle cap spacer for a hydrant nozzle cap, a spaced nozzle cap assembly, and a method for adjusting a rotational indexing of a nozzle cap are disclosed. The nozzle cap spacer for a hydrant nozzle cap can comprise a spacer body defining an outer body edge; and a resilient first spacer spring arm extending from the outer body edge, wherein the first spacer spring arm is biased away from the spacer body in an extended orientation.