Hydrant Nozzle Cap Assembly for Wireless Signal Sealing
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Solution Overview
Problem
Existing fire hydrant systems face challenges in transmitting wireless signals through metallic nozzle caps, which are impermeable to signals and can leak if not adequately sealed, making it difficult to monitor water pressure and flow characteristics effectively.
Innovation Solution
A nozzle cap design that includes a plug made of non-metallic material allowing wireless signal transmission, securely engaged with the inner cap, and a communications hub positioned adjacent to the inner cap, enabling signal communication from a sensing device within the hydrant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metallic nozzle cap is used to seal the hydrant opening, then the sealing reliability is improved, but wireless signal transmission is blocked
Solution Approach 1:
The nozzle cap is segmented into two distinct parts: a metallic outer cap that provides sealing against high water pressure, and a non-metallic inner plug that allows wireless signal transmission. This segmentation resolves the contradiction by assigning different functional requirements to different segments of the same component system.
Solution Approach 2:
The solution employs composite material construction by combining metallic material (for sealing) with non-metallic material (for signal transmission) within the nozzle cap assembly. The inner plug is specifically made from non-metallic material while the outer cap remains metallic, creating a composite structure that simultaneously achieves both sealing reliability and wireless communication capability.
2Loss of information
If an opening is created in the nozzle cap for signal transmission, then wireless communication is enabled, but water leakage risk increases
Solution Approach 1:
The non-metallic inner plug serves as an intermediary element that mediates between the conflicting requirements of signal transmission and leak prevention. It allows wireless signals to pass through while maintaining the sealing function, effectively acting as a mediator that reconciles the contradiction between openness for communication and closure for leak prevention.
Solution Approach 2:
The material parameter of the plug is changed from metallic to non-metallic, which fundamentally alters its electromagnetic properties to allow signal transmission while maintaining its sealing capability through proper material selection and design.
3Loss of information
If a non-metallic plug is used to allow signal transmission, then wireless communication is enabled, but structural strength under high pressure may be reduced
Solution Approach 1:
The composite material structure combines the strengths of different materials: the metallic outer cap provides the primary structural strength to withstand high water pressure (up to 300 psig), while the non-metallic inner plug provides signal transmission capability. This composite approach resolves the contradiction by distributing structural and functional requirements across different materials.
Solution Approach 2:
The functional segmentation assigns the structural strength requirement to the metallic outer cap and the signal transmission requirement to the non-metallic inner plug, allowing each component to be optimized for its specific function without compromising overall system performance.
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 reliable wireless communication of water pressure and flow data from the hydrant, ensuring accurate monitoring and preventing leaks by maintaining a sealed connection.
Implementation Method 1
the plug comprising a material that allows transmission of a wireless signal through the material
Data Source
AI summary
A nozzle cap for a hydrant can include an inner cap securably engageable with a nozzle of the hydrant, the nozzle configured to connect a fire hose to the hydrant; a communications hub positioned adjacent to the inner cap; and a plug plugging an opening defined in the inner cap and securably engaged with the inner cap, the plug including a material that allows transmission of a wireless signal through the material.