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Flowmeter

A technology of volume flow and mass flow, which is used in the application of electromagnetic flowmeters to detect fluid flow, liquid/fluid solid measurement, measurement flow/mass flow, etc. It can solve measurement errors, wear resistance, and poor volume stability of lining materials. question

Inactive Publication Date: 2016-03-09
ENDRESS HAUSER FLOWTEC AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Problems in the case of common lining materials installed in flow measuring devices are that they have poor volume stability and are not wear-resistant
Therefore, due to deformation and wear, measurement errors occur during the determination of the flow rate under the condition that the measured medium exerts a mechanical load on the lining material

Method used

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Embodiment Construction

[0036] In automation technology, especially in process automation technology, flow measuring devices are frequently used which serve to record and / or influence process variables. A large number of such flow measuring devices are produced and sold by Endress+Haus. In this case, the flow measuring device comprises, in particular, a Coriolis, ultrasonic, eddy current, thermally inductive and / or magnetically inductive flow measuring device.

[0037] Measuring tubes, which are lined with so-called inner linings at least in the media contact region of the respective measuring tube, are commonly used in many of the aforementioned flow measuring devices. This for example prevents corrosion of the metal support tube and acts inter alia as an electrical insulator and reduces the tendency for microbial growth in the measuring tube.

[0038] The aforementioned flow measuring devices have in each case at least one measuring tube and one or more sensors for determining the flow-related mea...

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Abstract

A flowmeter comprising a measuring tube with a sensor arrangement and an evaluation unit for determining a flow rate, a volumetric flow and / or a mass flow, wherein the sensor arrangement is arranged on or in a measuring tube, which measuring tube: A1) has a measuring tube wall made of a metal support material, and B1) a first material layer for protecting the metal support material from corrosive measuring media, which layer is applied to an inner lateral surface of the measuring tube wall; or A2) has a measuring tube wall made of a corrosion-resistant plastic material, wherein C) a second material layer is arranged in the measuring tube on that side of the first material layer which faces the medium or on the measuring tube wall made of the corrosion-resistant plastic material for the purpose of reducing the mechanical load, in particular the abrasive load, on the plastic material by the measuring medium, wherein the second material layer has a greater hardness than the first material layer or the measuring tube wall made of corrosion-resistant plastic material.

Description

technical field [0001] The invention relates to a flow measuring device as defined in the preamble of claim 1 . Background technique [0002] Flow measuring devices are known which have a measuring tube with an outer tube of metallic support material which is equipped with a first ply of corrosion-resistant and diffusion-hindering synthetic material, the so-called inner lining. This material protects the outer tube from aggressive media. [0003] A problem in the case of common lining materials installed in flow measuring devices is that they have poor volume stability and are not wear-resistant. Consequently, measurement errors occur during the determination of the flow rate in the event that the measured medium exerts a mechanical load on the lining material due to deformation and wear. Contents of the invention [0004] It is therefore an object of the present invention to provide more accurate flow measurements. [0005] The invention achieves this object by means o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/58F16L57/06
CPCF16L57/06F16L58/1036G01F1/58G01F1/584F16L58/00
Inventor 米夏埃尔·肖夫
Owner ENDRESS HAUSER FLOWTEC AG
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