Moisture Measurement Device for Pressurized Firefighting Equipment
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Solution Overview
Problem
Current methods for testing moisture in pressurized firefighting equipment are inconvenient and can compromise the equipment's integrity, often requiring depressurization and leading to unnecessary replacement of extinguishing powders, which is economically and environmentally wasteful.
Innovation Solution
A portable device with two chambers allows for moisture measurement without depressurizing the equipment, using sensors to detect moisture levels in the gas and transmit results, enabling on-site testing of firefighting equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional moisture testing methods are used, then moisture content can be measured, but the equipment must be depressurized and repressurized which compromises equipment integrity and operational reliability
Solution Approach 1:
The patent introduces an intermediary sampling chamber that connects to the pressurized equipment through a one-way valve system. This intermediary chamber allows moisture measurement without direct access to the main pressurized container, enabling testing while maintaining equipment integrity and avoiding depressurization complications.
Solution Approach 2:
The patent extracts a small sample of propellant gas into a separate sampling chamber for moisture analysis. By taking out only the necessary amount of gas for testing while leaving the main system pressurized, the method enables measurement without compromising equipment operational integrity.
2Measurement precision
If equipment is depressurized for testing, then moisture measurement can be performed, but propellant may leak and pressure may drop compromising safety
Solution Approach 1:
The sampling chamber acts as an intermediary that receives propellant gas through a one-way valve while preventing backflow. This mediator enables moisture measurement without creating conditions for propellant leakage or pressure drop in the main equipment.
Solution Approach 2:
The one-way valve system implements preliminary anti-action by preventing propellant from flowing back into the main container during sampling. This preventive measure counteracts the potential harmful effect of propellant leakage before it can occur.
3Stress or pressure
If repressurization is performed after testing, then equipment pressure is restored, but moisture may penetrate the powder from outside during the process
Solution Approach 1:
By extracting the propellant sample into a separate chamber for testing, the patent isolates the testing process from the main equipment. This extraction eliminates the need for repressurization of the main container, thereby preventing moisture contamination during the pressure restoration process.
4Loss of time
If portable on-site testing is implemented, then transportation to laboratories is eliminated, but the device must be compact and portable
Solution Approach 1:
The sampling chamber is designed to nest within or attach compactly to the fire extinguisher body. This nested configuration enables portable on-site testing by fitting the testing apparatus within the existing equipment footprint, eliminating transportation requirements while maintaining portability.
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 measurement of minimal moisture changes without affecting internal pressure, reducing waste and environmental impact by allowing effective powders to remain in use and eliminating the need for transportation to specialized laboratories.
Implementation Method 1
A sensor means detects the moisture content of the gas collected in the aforesaid chamber, generating a signal which may be processed and viewed by an operator
Data Source
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Figure 5
AI summary
A portable testing device (9) for measuring moisture inside pressurized firefighting equipment comprises an outer casing (10), which includes a first chamber (12), wherein a primary sensor means is housed (20) for detecting the moisture content in a gas flow drawn from the firefighting equipment, an attachment portion (14), for putting the first chamber (12) in fluid communication with the inside of the pressurized firefighting equipment, a first filter (16), to retain the extinguishing powder so that it does not penetrate into such first chamber (12), a second chamber (18), wherein processing means are housed to electronically process the signals of the primary sensor means (20), and a wall (18a), interposed between the first chamber (12) and the second chamber (18).