Magnetic-Inductive Flow Meter Pole Shoe Integration
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Solution Overview
Problem
Existing magnetic-inductive flow meters for disposable applications require increased energy consumption to achieve a homogeneous magnetic field in the measuring section of the measuring tube.
Innovation Solution
The magnetic-inductive flow meter design includes a measuring tube with an integrally formed holder for a pole shoe, which is replaced with each measuring tube, reducing the distance between the medium channel and the magnetic-field-generating device, and enhancing magnetic field homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the pole shoe is arranged in the housing of the receiving unit with a larger distance from the measuring tube, then the device structure is simpler, but the magnetic field homogeneity deteriorates and energy consumption increases
Solution Approach 1:
The magnetic field generating system is segmented into two parts: the coil assembly remains in the receiving unit housing, while the pole shoe is separated and integrated with the measuring tube. This segmentation allows the pole shoe to be positioned closer to the measuring section, improving magnetic field homogeneity and reducing energy consumption without requiring complete structural redesign.
Solution Approach 2:
The pole shoe acts as an intermediary component between the coil assembly and the medium in the measuring tube. By positioning the pole shoe on the measuring tube, it serves as a magnetic field mediator that directs and concentrates the magnetic field lines through the measuring section, achieving better homogeneity and reducing the energy required from the coil assembly.
2Measurement precision
If the pole shoe is integrated with the measuring tube, then the magnetic field homogeneity improves and energy consumption decreases, but the device complexity increases
Solution Approach 1:
The pole shoe is merged with the measuring tube by integrating it into the holder structure of the measuring tube. This merging approach combines two functional components (pole shoe and measuring tube holder) into a single integrated unit, which simplifies the overall device structure while achieving improved magnetic field homogeneity.
Solution Approach 2:
The holder structure of the measuring tube is designed to serve multiple functions: it mechanically supports the measuring tube, positions the pole shoe, and facilitates electrical connections. This multi-functionality reduces the need for separate components, thereby reducing device complexity while maintaining magnetic field performance.
3Use of energy by stationary object
If the pole shoe is replaced with each measuring tube, then the magnetic field homogeneity is maintained and energy consumption is reduced, but the ease of operation deteriorates
Solution Approach 1:
The pole shoe is combined with the measuring tube assembly, so that replacing the measuring tube automatically replaces the pole shoe as well. This merging eliminates the need for separate pole shoe replacement operations, simplifying the replacement process while maintaining optimal magnetic field conditions.
Solution Approach 2:
The measuring tube assembly is designed as a self-contained unit where the pole shoe is pre-integrated. When the measuring tube is replaced, the entire assembly including the pole shoe is replaced as a single unit, eliminating the need for separate adjustment or installation steps for the pole shoe and ensuring consistent magnetic field performance.
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 reduces energy consumption while maintaining a substantially homogeneous magnetic field, improving the efficiency and cost-effectiveness of the flow meter for disposable applications.
Implementation Method 1
a magnetic-field-generating device (25) for generating a magnetic field that extends through the measuring tube holder (24) and the measuring tube (1)
Implementation Method 2
A magnetic-inductive flow meter has a magnet system that generates a magnetic field perpendicular to the direction of flow of the flowing medium
Implementation Method 3
the pole shoe is located in the holder... the distance between the channel of the measuring tube, which can be supplied with the medium, and the magnetic-field-generating device is reduced, and the magnetic field running through the channel of the measuring tube is more homogeneous
Implementation Method 4
a measuring electrode pair attached to the lateral surface of the measuring pipe taps an electrical measurement voltage or potential difference which is applied perpendicularly to the direction of flow and to the magnetic field and occurs when a conductive medium flows in the direction of flow when the magnetic field is applied. Since, according to Faraday's law of induction, the tapped measurement voltage depends on the velocity of the flowing medium
Data Source
AI summary
The present disclosure relates to a measuring tube for conducting a flowable medium in a longitudinal direction, which includes: a measuring tube body designed to be electrically insulating, the measuring tube body including an integrally designed holder and a mounting surface for installing the measuring tube in a receiving unit in a mechanically detachable manner in a position defined by the mounting surface; at least two measuring electrodes positioned diametrically in the measuring tube body to form a galvanic contact with the medium; and at least one pole shoe formed from a single sheet metal part or from a plurality of sheet metal parts stacked in particular in the longitudinal direction of the pole shoe and connected to one another, the pole shoe being located in the holder. The present disclosure also relates to a receiving unit and a magnetic-inductive flow meter.