Vortex Flow Meter Coating for Chemical Resistance
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Solution Overview
Problem
Vortex flow meters face challenges in ensuring durability and resistance across various applications due to material limitations when measuring substances, as existing materials may not be resistant to all substances, necessitating costly and specialized designs.
Innovation Solution
Coating all components that come into contact with the measured substance with inexpensive, resistant materials such as plastics, nitrates, or ceramics, allowing the use of non-resistant basic materials and extending the applicability of vortex flow meters to new tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If expensive resistant materials are used for all components contacting the measured substance, then durability and resistance are improved, but manufacturing cost increases
Solution Approach 1:
The patent applies different material properties to different parts of the vortex flow meter. Specifically, only the components that directly contact the measured substance (measurement tube, bluff body, sensor surfaces, and electrodes) are made from resistant materials, while other parts can use less expensive materials. This localized application of high-performance materials resolves the contradiction by providing durability only where absolutely necessary, rather than uniformly across the entire device.
Solution Approach 2:
The patent employs composite construction by combining resistant materials (for components contacting the measured substance) with standard materials (for other components). This composite approach allows the device to achieve the reliability of expensive resistant materials in critical areas while maintaining cost-effectiveness in non-critical areas, thus resolving the contradiction between durability and manufacturing cost.
2Reliability
If resistant materials are used for all components, then resistance to measured substances is improved, but device complexity increases
Solution Approach 1:
The patent implements local quality by specifying resistant materials only for components that directly interact with the measured substance (measurement tube, bluff body, sensor surfaces, and electrodes). Other components can use standard, simpler materials. This selective material specification reduces device complexity compared to using resistant materials throughout, while still providing adequate resistance where needed.
3Adaptability or versatility
If specialized resistant materials are used, then applicability to different substances is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies resistant materials selectively to the components that contact the measured substance (measurement tube, bluff body, sensor surfaces, and electrodes). This localized approach provides the adaptability and versatility needed for different substances only where required, while keeping the rest of the device simple and cost-effective to manufacture, thus resolving the contradiction between applicability and manufacturing cost.
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 solution provides a durable and flexible vortex flow meter that can handle a wide range of substances without modifying the basic material, reducing costs and enabling adaptation to new measurement tasks with standard equipment.
Implementation Method 1
The local pressure changes involved in the vortex shedding are usually detected by a piezo sensor and converted into electrical pulses corresponding to the vortex frequency
Implementation Method 2
At the bluff body past which the medium flows, reciprocal vortices are formed on both sides. Owing to the flow, the vortices are shed and a vortex street (Karman vortex street) is formed
Data Source
AI summary
The vortex flow meter provides a surface which is simple but nevertheless resistant to the substances to be measured. All parts of the measurement tube of the vortex flow meter which come in contact with the substance to be measured are coated with a less noble material, which is resistant to the respectively relevant substance to be measured, the basic material not having this resistance.