Electromagnetic Flow Meter Earth Ring for Lining Deformation Control
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Solution Overview
Problem
In electromagnetic flow meters, lining materials used for insulation and corrosion resistance can deform under high fluid pressure, compromising liquid tightness.
Innovation Solution
An earth ring with a wall part is used to contact and suppress the lining material from deforming, maintaining high surface pressure and preventing deformation, which is achieved by adjusting the inner diameter and height of the wall part to allow for compression without early contact with the flange, thus enhancing pressure resistance and liquid tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lining material is used for insulation and corrosion resistance in the measurement tube, then the measurement tube gains insulation properties and corrosion resistance, but the lining material deforms under high fluid pressure, compromising liquid tightness
Solution Approach 1:
The earth ring with wall part is installed beforehand to prevent the lining material from deforming under fluid pressure. The wall part creates a preliminary counteracting force that opposes the outward pressure of the fluid, preventing the lining material from bulging and maintaining liquid tightness between the flange parts.
Solution Approach 2:
The earth ring with wall part acts as an intermediary component between the fluid pressure and the lining material. It transfers and distributes the pressure from the fluid to the flange parts, preventing direct deformation of the lining material while maintaining the necessary compression for liquid tightness.
2Strength
If the earth ring wall part contacts the lining material to suppress deformation, then pressure resistance improves, but the wall part may contact the flange prematurely, reducing compression effectiveness
Solution Approach 1:
The inner diameter and height of the wall part are specifically designed with optimized parameters. The inner diameter is larger than the measurement tube inner diameter, and the height is controlled to ensure the wall part contacts the lining material at appropriate compression levels without interfering with flange assembly, achieving both pressure resistance and proper compression.
3Stress or pressure
If the lining material is compressed to maintain liquid tightness, then surface pressure increases, but the lining material deforms outward under high pressure, reducing surface pressure
Solution Approach 1:
The wall part of the earth ring provides a counteracting force against the outward deformation of the lining material under fluid pressure. This counterforce balances the pressure forces, maintaining the compressed state of the lining material and ensuring continuous surface pressure for liquid tightness even under high fluid pressure conditions.
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 solution effectively suppresses lining material deformation, maintaining high liquid tightness and pressure resistance, even under high fluid pressures, thereby ensuring reliable operation of the electromagnetic flow meter.
Implementation Method 1
an earth ring with a wall part is used to contact and suppress the lining material from deforming
Implementation Method 2
an electromagnetic flow meter configured to measure a flow rate of conductive fluid by using electromagnetic induction
Data Source
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AI summary
An electromagnetic flow meter includes a measurement tube having a flange part, the flange part being configured to be coupled to a piping-side flange by a bolt fastening, a lining material configured to cover an inside of the measurement tube and an inner periphery area having a predetermined diameter of a coupling-side surface of the flange part, and an earth ring configured to be placed between the flange part and the piping-side flange. The earth ring has a ring plate part and a wall part formed along an outer periphery of the ring plate part.