Foam Gas Sampling Apparatus with Grinding and Pressure Measurement
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Solution Overview
Problem
Existing methods for collecting gas samples from foams, such as urethane foams, are inefficient due to irregular cell structures and resilience, leading to errors and reduced reliability in gas analysis, which affects the evaluation of foam characteristics and heat insulating performance.
Innovation Solution
An apparatus comprising a body with a grinding part, pressing part, purge gas injecting part, and pressure gauge that grinds the foam, allowing for accurate gas collection and pressure measurement before and after sampling, using a method that includes purging, inserting a foam sample, controlling pressure, grinding, measuring pressure, and analyzing the gas samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a blade is used to cut foam cells for gas collection, then gas samples can be collected from specific portions, but the irregular cell structure and foam resilience cause incomplete gas collection and high error rates
Solution Approach 1:
The patent replaces the traditional blade cutting method with a grinding method using a grinding wheel. This mechanical substitution allows for more effective destruction of foam cells and complete gas extraction, overcoming the limitations of blade cutting due to foam resilience and irregular cell structures.
Solution Approach 2:
The patent changes the physical state and properties of the foam during the grinding process by applying mechanical energy through the grinding wheel, transforming the foam structure from a resilient, irregular state to a completely destroyed state that allows complete gas extraction. The grinding process changes parameters such as cell integrity and gas release characteristics.
2Quantity of substance
If multiple cutting operations are performed to collect gas from different portions, then more gas samples can be obtained, but the process becomes time-consuming and cannot completely destroy the resilient foam
Solution Approach 1:
The grinding wheel provides a more effective mechanical action compared to repeated blade cutting. The grinding process can completely destroy foam cells in a single operation, achieving complete gas extraction without requiring multiple sequential cutting operations, thus saving time while maximizing gas collection completeness.
3Reliability
If foam is exposed to air for long term heat insulation testing, then heat insulating performance can be evaluated, but gas diffusion from air reduces performance and complicates analysis
Solution Approach 1:
The patent performs gas collection and analysis immediately after foam synthesis, before significant gas diffusion from air can occur. This preliminary action captures the original gas composition in the foam cells, providing accurate baseline data for heat insulation evaluation without the confounding effects of later gas diffusion.
Solution Approach 2:
The patent rushes through the gas collection process at the optimal time point immediately after foam formation, capturing the gas samples before the harmful gas diffusion process significantly degrades the foam's gas composition. This timing strategy skips the period when gas diffusion would complicate the analysis.
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 apparatus enables reliable and accurate collection and analysis of gas samples from foams, reducing errors and improving the evaluation of foam characteristics, particularly for urethane foams, by effectively grinding the foam and measuring pressure changes, thus enhancing the assessment of heat insulating performance.
Implementation Method 1
a grinding part 200 formed to contact one side of the foam F in the body 100, thereby grinding the foam F
Implementation Method 2
a pressing part 300 formed to contact the other side of the foam F in the body 100, thereby pressing the foam F toward the grinding part 200
Implementation Method 3
a pressure gauge 600 measuring pressure in the body 100
Implementation Method 4
a purge gas injecting part 400 formed at one side of the body 100 to thereby inject purge gas into the body 100
Data Source
AI summary
Provided are an apparatus for collecting gas samples in a foam and an analysis method using the same, and more particularly, to an apparatus for collecting gas samples in a foam in which the foam is grinded, such that the gas sample in the foam may be effectively collected, and pressure before and after collection of the gas samples may be measured to thereby increase accuracy of gas analysis, such that characteristics of the foam may be more accurately evaluated, and an analysis method using the same.