Electromagnetic Flow Meter Groove Liner Fixing
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Solution Overview
Problem
Conventional methods for preventing resin lining detachment in electromagnetic flow meters are costly and require advanced forming techniques, especially when using cylindrical porous plates or dovetail grooves, which increase process and material costs.
Innovation Solution
The use of semicircular, rectangular, or triangular grooves on the inner surface of the measurement pipe and flanges, along with a belt-shaped spiral porous plate, simplifies the process and reduces costs by providing an anchoring effect for the resin lining and eliminating the need for advanced forming techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cylindrical porous plates or dovetail grooves are used to prevent resin lining detachment, then the lining fixation is improved, but the process complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces expensive and complex cylindrical porous plates with simple groove structures that can be easily formed on the measurement pipe. The grooves act as disposable anchoring features that are integrated into the pipe structure rather than requiring separate reinforcing components.
Solution Approach 2:
The invention extracts the essential function of the porous plate (providing mechanical anchoring) and implements it through a simpler geometric feature (grooves) that is directly formed on the pipe surface, eliminating the need for separate reinforcing members.
2Reliability
If cylindrical porous plates or dovetail grooves are used to prevent resin lining detachment, then the lining fixation is improved, but the material cost increases
Solution Approach 1:
The patent replaces expensive porous plate materials with simple groove structures that require minimal additional material, reducing the overall material cost while maintaining the anchoring function.
Solution Approach 2:
The grooves are formed only in specific locations where anchoring is needed, rather than using a continuous porous plate structure, thereby reducing material consumption while maintaining local fixation strength.
3Reliability
If advanced forming techniques are used to manufacture measurement pipes with reinforcing members, then the lining detachment is prevented, but the manufacturing ease deteriorates
Solution Approach 1:
The invention removes the complex step of manufacturing and installing separate reinforcing members (porous plates) and replaces it with a simple groove formation process that can be integrated into standard pipe manufacturing.
Solution Approach 2:
The anchoring features (grooves) are merged directly into the pipe structure during manufacturing, eliminating the need for separate assembly steps and simplifying the overall manufacturing process.
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 reduces process and material costs, facilitates easy manufacturing, and enhances the resin lining's resistance to detachment and negative pressure, improving flow rate measurement accuracy and stability.
Implementation Method 1
An electromagnetic flow meter is configured to measure a flow rate by applying an electric current to a coil to generate a magnetic field inside a measurement pipe, and by detecting magnitude of an electromotive force generated in proportion to the electric conductivity of a liquid flowing inside the measurement pipe
Data Source
AI summary
An electromagnetic flow meter has a pipe body 16 in which a measurement target fluid flows. The pipe body 16 includes: a measurement pipe 1 having a groove 3 whose cross-section is any of a semicircular shape, a rectangular shape, and a triangular shape formed on an inner surface in a circumferential direction; and a resin lining portion 10a formed on the inner surface of the measurement pipe.