US 5,852,362 AGranted

Device for magnetic-inductive measurement of the quantity of mixture flowing through a pipeline

AssigneeFHC Systems B.V. and Krohne Altometer

InventorsArie Cornelis Batenburg, Aart Jan Van Bekkum, Cornelis Hendrik Van Den Berg, Alexander Marnix Heijnsdijk, Casparus Henricus Marius Kramers, Teunis Visser, Antonie Cornelis Van Zutphen

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Abstract

A device and a method for its manufacture, for magnetic-inductive measurement of the quantity of mixture flowing through a pipeline into which the device has been incorporated. The device includes a housing having a measuring tube with an electrically insulating lining therein. The lining substantially consists of wear-resistant, insulating ceramic material in the form of tiles applied on a layer of plastic material having a thickness between 3 and 10 mm. The joints between the tiles are filled with plastic material. The housing contains magnetic coils. A pair of electrodes are mounted in the measuring tube and extend through the wall of the measuring tube and are insulated in relation to it. Within the housing, the electrodes are connected to lines leading to measuring members for measuring the voltage difference generated in the flowing medium by the magnetic field of the magnetic coils.

Claims12

Dependent claims

A device for magnetic-inductive measurement of a quantity of mixture flowing through a pipeline, the device comprising:

a measuring tube mounted in the pipeline and receiving the mixture flowing through the pipeline, the measuring tube including a metal wall with an inner side and an electrically insulative lining;
a housing surrounding the tube;
magnetic coils extending between the housing and the measuring tube, the magnetic coils having a magnetic field which generates a voltage difference in the mixture flowing through the measuring tube;
at least one electrode mounted in the tube, and extending through the metal wall of the tube from an outside of the wall to the inside of the wall;
and
measuring members located outside the measuring tube, and connected to the at least one electrode, the measuring members measuring the voltage difference generated in the mixture flowing through the measuring tube;
wherein the inner side of the metal wall of the measuring tube is coated with an insulating plastic layer having a thickness between 3 mm and 10 mm;
and
wherein a layer of ceramic tiles is adhered to the inner side of the metal wall by plastic, adjacent tiles being positioned such that joints between adjacent tiles extend in a longitudinal direction of the measuring tube, and plastic material filling the joints.

6 more elements

Dependencies are inferred from the claim text.