Magnetic-Inductive Flow Meter Helical Recess Support
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Solution Overview
Problem
Existing magnetic-inductive flow meters lack sufficient security against torsion of the support body, which can lead to instability and potential displacement of the support body and liner.
Innovation Solution
The magnetic-inductive flow meter incorporates a measuring tube with a carrier body featuring a helical first recess that extends continuously in the flow direction, interlockingly connecting the support body to the carrier body, thereby preventing rotation and securing the support body against torsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an annular groove is used to secure the support body, then the support body is secured against longitudinal displacement, but the support body is not sufficiently secured against twisting about the longitudinal axis
Solution Approach 1:
The invention transitions from a two-dimensional annular groove (securing only in radial direction) to a three-dimensional helical recess that extends along the longitudinal axis. This adds the longitudinal dimension to the anchoring mechanism, creating interlocking engagement that resists both radial displacement and torsional rotation simultaneously.
Solution Approach 2:
The helical recess employs a curved, spiral geometry instead of a straight or planar groove. This curved configuration distributes mechanical stresses more effectively and provides continuous engagement surfaces that resist multi-directional forces including torsion, while the helical shape naturally prevents rotation about the longitudinal axis.
2Stability of the object's composition
If the support body is secured rigidly to prevent all movement, then stability is improved, but the ability to accommodate thermal expansion and material shrinkage is reduced
Solution Approach 1:
The helical recess provides different degrees of constraint at different locations and directions. The geometry allows rigid constraint against torsion and longitudinal displacement where needed, while maintaining sufficient clearance and flexibility to accommodate radial expansion and contraction due to thermal effects and material shrinkage.
Solution Approach 2:
The support body's engagement with the carrier body changes dynamically with temperature and pressure conditions. The helical recess geometry allows the support body to expand and contract radially while maintaining stable longitudinal and rotational positioning, adapting its effective engagement parameters based on operating 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 helical recess design effectively secures the support body against torsion, reducing the risk of displacement and enhancing the stability of the flow meter, while also allowing for the use of sintered materials that are more durable and resistant to vibrations.
Implementation Method 1
a device arranged on the measuring tube for generating a magnetic field that penetrates the measuring tube
Implementation Method 2
a measurement 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
A magnetic-inductive flow meter for determining a flow velocity-dependent measurement variable induced in a flowable medium is provided, said flow meter comprising: a measuring tube for conducting the flowable medium in a flow direction, the measuring tube comprising a carrier body, the measuring tube comprising an inlet region in which the carrier body has a first recess located on an inner side of the carrier body, the first recess extending continuously in the flow direction, the measuring tube comprising a support body for stabilizing a liner, the support body being located between the carrier body and the liner, the support body extending into the first recess and thus being interlockingly connected to the carrier body; a device located on the measuring tube for generating a magnetic field that penetrates the measuring tube; and —two measuring electrodes for tapping a measuring voltage induced in the flowable medium.