Clamp-On Ultrasonic Coupling for Rough Pipeline Surfaces
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Solution Overview
Problem
Existing clamp-on ultrasonic measuring devices face challenges in achieving long-term stable acoustic coupling on pipelines with rough outer surfaces, such as those made of asbestos cement, due to issues like grease penetration compromising the coupling function.
Innovation Solution
A method involving the application of a flowable compound as a sealing layer on the pipeline surface, which cures to form an elastic layer, and a separating device is used to ensure stable contact with the transducer, allowing easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grease is applied to pipelines with rough outer surfaces, then acoustic coupling is initially improved, but the grease penetrates into the pipeline wall and the coupling function is lost over time
Solution Approach 1:
The patent introduces a separating device as an intermediary layer between the pipeline surface and the ultrasonic transducer. This separating device prevents direct penetration of coupling agents into the rough pipeline wall while maintaining acoustic coupling. The separating device acts as a mediator that resolves the contradiction by blocking the harmful penetration path while preserving the useful acoustic transmission function.
Solution Approach 2:
The patent applies a sealing layer to the pipeline surface before installing the ultrasonic transducer. This preliminary action creates a controlled interface that prevents subsequent penetration of coupling agents into the pipeline wall. By preparing the surface in advance with a sealing layer, the patent ensures long-term coupling stability without the harmful effects of grease penetration.
2Ease of operation
If a clamp-on ultrasonic transducer is directly contacted with a rough pipeline surface, then installation is simple, but stable acoustic coupling cannot be achieved
Solution Approach 1:
The separating device serves as an intermediary that bridges the rough pipeline surface and the smooth transducer interface. It maintains acoustic coupling quality by providing a controlled interface, while the overall installation process remains relatively simple by following a standardized procedure of applying sealing layer, positioning the separating device, and mounting the transducer.
Solution Approach 2:
The separating device and sealing layer act as flexible thin films that conform to the rough pipeline surface while providing a smooth interface for the transducer. This flexible intermediate layer resolves the contradiction by adapting to surface irregularities without compromising acoustic coupling quality.
3Reliability
If a flowable compound is applied and cured to form a sealing layer, then acoustic coupling stability is improved, but the installation process becomes more complex
Solution Approach 1:
The flowable compound is self-curing, meaning it hardens automatically without requiring external intervention or complex curing equipment. This self-service property improves acoustic coupling stability while minimizing the increase in installation complexity, as the material performs the curing function autonomously.
Solution Approach 2:
The flowable compound undergoes a parameter change from liquid to solid state through self-curing. This phase transition provides the benefits of both states: liquid for easy application and conformability to the pipeline surface, and solid for stable, durable acoustic coupling. The parameter change resolves the contradiction by enabling simple application with complex performance outcomes.
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
Ensures robust and long-term stable acoustic coupling between the ultrasonic transducer and the pipeline, maintaining effective contact despite surface roughness.
Implementation Method 1
wherein in a second method step the sealing layer cures or is caused to cure
Implementation Method 2
curing means that a flowable compound becomes an elastic compound which, depending on the starting material, has an elasticity like rubber or like metal
Implementation Method 3
clamp-on ultrasonic transducer
Implementation Method 4
a good acoustic, long-term stable contact between the clamp-on ultrasonic transducer and the pipeline
Data Source
AI summary
The disclosure relates to a method for installing a clamp-on ultrasonic measuring device on a pipeline in order to measure a media property of a medium flowing through the pipeline. The clamp-on ultrasonic measuring device has at least one clamp-on ultrasonic transducer. The pipeline has a wall with an outer surface, and the outer surface has a surface roughness with an average roughness value of at least 10 micrometers. In a first step, a sealing layer comprising a flowable compound is applied onto a wall section; in a second step, the sealing layer is cured; and in a third step during or after the curing step, one of the at least one clamp-on ultrasonic transducers is positioned and establishes an acoustic and mechanical contact with the separating device or the contacting element.