Magnetic-Inductive Flowmeter Ribbed Measuring Line
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Solution Overview
Problem
Magnetic-inductive flowmeters face challenges in maintaining measurement accuracy under high pressure and low conductivity conditions, where the induced measurement voltage is low and susceptible to interference, and existing support ribs may not prevent buckling of the measuring line's partial surface, affecting the alignment of the pole shoe and magnetic field generation.
Innovation Solution
The magnetic-inductive flowmeter features a measuring line with a flattened partial surface and support ribs, where the pole shoe is divided into parts with cutouts for the ribs, allowing it to lie flush and be supported, and is connected to a coil core with magnetic webs for minimal magnetic resistance, enabling a strong and homogeneous magnetic field penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the measuring line has a thin-walled measuring section to enable strong magnetic field penetration, then measurement accuracy is improved, but the partial surface becomes susceptible to buckling under high pressure
Solution Approach 1:
The pole shoe is divided into multiple pole shoe parts with cutouts that accommodate the support ribs. This segmentation allows the magnetic field generating device to adapt to the ribbed structure of the measuring line, enabling close coupling and strong magnetic field penetration through the thin-walled measuring section while the support ribs prevent buckling of the partial surface under high pressure.
Solution Approach 2:
The support ribs are strategically positioned on the partial surface to provide localized reinforcement against buckling, while the pole shoe parts are designed with corresponding cutouts to accommodate these ribs. This local adaptation ensures that the thin-walled measuring section maintains its structural integrity in critical areas while remaining thin enough for effective magnetic field penetration.
2Stability of the object's composition
If support ribs are added to prevent buckling of the partial surface, then structural stability is improved, but the pole shoe alignment may be affected
Solution Approach 1:
The pole shoe is segmented into multiple pole shoe parts with integrated cutouts that are specifically designed to accommodate the support ribs. This segmentation and integration ensure that the pole shoe parts can be precisely positioned and aligned relative to the ribs, maintaining manufacturing precision while providing the structural stability needed to prevent buckling.
3Strength
If the measuring line is made of metal for stable construction, then structural strength is improved, but measurement accuracy under high pressure and low conductivity conditions deteriorates
Solution Approach 1:
The measuring line is designed with a thin-walled measuring section made of non-conductive material (such as plastic) to enable strong magnetic field penetration and accurate measurements, while support ribs provide localized reinforcement to prevent buckling. This local quality differentiation allows the measuring section to have the properties needed for accurate measurement while the overall structure maintains sufficient strength.
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 design ensures high measurement accuracy and stability under high pressure loading by preventing buckling and maintaining the alignment of the pole shoe, while allowing a strong magnetic field to penetrate the measuring line, enhancing the flowmeter's performance in challenging conditions.
Implementation Method 1
According to Faraday's law of induction, an electric field strength perpendicular to the direction of flow of the medium and perpendicular to the magnetic field occurs in a flowing, electrically conductive medium permeated by a magnetic field. Faraday's law of induction is used in magneto-inductive flowmeters in that a magnetic field generating device, which usually has at least one magnetic field coil, a coil core and a pole shoe, is used to generate a magnetic field that changes over time during the measurement process
Implementation Method 2
the magnetic field generating device includes at least one coil core and a pole shoe... generate a magnetic field that at least partially penetrates the measuring line
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a magnetic-inductive flowmeter comprising a measuring line (1), a magnetic field generation device (2), and a measuring electrode (3). The measuring line (1) has a measuring section (4) flattened on one side with a flat measuring line surface, hereinafter referred to as surface (5), and the magnetic field generation device (2) has a pole piece (7). The invention aims to provide a flowmeter that enables high measuring accuracy even under high pressure. This objective is achieved by incorporating a support rib (9) on surface (5).