Leak Testing Using Soap Bubble Tracer Gas Carrier
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Solution Overview
Problem
Conventional leak testing methods using tracer gases like helium face challenges in controlling the gas flow to specific leak sites, leading to inefficient use of tracer gas and difficulty in differentiating between closely adjacent leaks.
Innovation Solution
The method involves transporting tracer gas within soap bubbles, which are easily visible and controllable, allowing for targeted release near the test object by bursting the bubbles, reducing gas consumption and accelerating the testing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If tracer gas is sprayed into the ambience to form an invisible cloud, then the leak testing can be performed, but the tracer gas consumption is high and the flow cannot be controlled to specific leak sites
Solution Approach 1:
The patent introduces soap bubbles as an intermediary carrier to transport tracer gas. The bubbles act as visible, controllable vessels that can be directed toward leak sites using air streams, eliminating the need for invisible gas clouds and enabling precise delivery of tracer gas to specific locations while reducing overall consumption.
Solution Approach 2:
The patent makes the tracer gas visible by enclosing it in soap bubbles, which provide optical contrast against the background. This visibility allows the operator to track and control the gas flow precisely, directing bubbles toward suspected leak sites rather than relying on invisible gas clouds that spread uncontrollably.
2Ease of operation
If helium is sprayed to form an invisible cloud, then the leak detection can be performed, but it is not easy to guide the cloud to suspected leak sites
Solution Approach 1:
Soap bubbles serve as a visible intermediary that can be manually guided toward leak sites using air streams. This allows precise control over where the tracer gas is delivered, ensuring high concentration accumulation at the suspected leak location rather than diffuse distribution.
Solution Approach 2:
The soap bubbles are prepared in advance as controllable carriers, and air streams are used to pre-position them at the suspected leak site before the actual detection phase. This preliminary positioning ensures the tracer gas is already concentrated at the correct location when the leak testing begins.
3Measurement precision
If tracer gas is released in concentrated form, then the leak detection sensitivity is improved, but the gas consumption increases
Solution Approach 1:
The soap bubbles act as efficient intermediaries that deliver tracer gas in concentrated form directly to the leak site. Because the bubbles can be directed precisely and burst only at the target location, the gas is not wasted in unnecessary areas, achieving high detection sensitivity while minimizing overall consumption.
Solution Approach 2:
The patent applies local quality by concentrating the tracer gas delivery at specific locations where leaks are suspected. The soap bubbles enable localized release of high concentrations of gas only where needed, rather than distributing gas uniformly throughout the entire test area, thus improving sensitivity at leak sites while reducing total consumption.
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
This approach minimizes tracer gas usage and enhances the precision of leak detection by ensuring high concentration at the leak site, thereby improving the effectiveness of the leak testing process.
Implementation Method 1
the tracer gas is transported to the test object while contained within soap bubbles
Implementation Method 2
bubbles consisting of a soap-like polymer which has a high surface tension
Implementation Method 3
When contacting the test object, the soap bubbles will burst so that the tracer gas will be released and enter the atmosphere
Implementation Method 4
move it toward the test object by blowing an airstream onto it, e.g. with the aid of a blower
Implementation Method 5
Internally of the test object, a vacuum is generated so that, in case that the test object has a leak, tracer gas will be sucked into the interior of the test object
Data Source
Figure 1
AI summary
For leak testing, a tracer gas is advanced to the outer wall (11) of the hollow test object (10) while the test object (10) is in an evacuated state. The tracer gas is discharged from a blower device (14) in the form of soap bubbles (21). When contacting the outer wall (11), the soap bubbles will burst, thus forming a cloud (27) of tracer gas immediately on the outer wall (11). By the invention, it is made easier to localize the invisible tracer gas in the ambient air. Further, the tracer gas can be used more effectively so that the costs for performing the testing process are reduced.