Modular Coriolis flowmeter

Patent metadata

Field	Value
Publication number	US-12436013-B2
Application number	US-202118256858-A
Country	US
Kind code	B2
Filing date	Nov 26, 2021
Priority date	Dec 10, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A modular Coriolis flowmeter includes: a measuring tube module, including a measuring tube for guiding the medium, an excitation magnet on a vibration exciter for exciting the measuring tube, and a sensor magnet on a vibration sensor for detecting a vibration of the measuring tube; a receiving module including a receptacle for receiving the measuring tube module, an excitation coil on the vibration exciter, a sensor coil on the vibration sensor, and a receiving module body, including a ferromagnetic material and an opening, wherein a coil holder for the excitation coil and/or sensor coil is disposed in the opening, the coil holder including a coil holder body including an electrically insulating material.

First claim

The invention claimed is:

1. A modular Coriolis flowmeter for determining a process variable of a flowable medium, the flowmeter comprising:
a measuring tube module, comprising:
at least one measuring tube configured to convey the medium;
at least one excitation magnet on a vibration exciter configured to excite vibrations in the at least one measuring tube, wherein the at least one excitation magnet is arranged on the at least one measuring tube; and
at least one sensor magnet on a vibration sensor configured to detect a vibration of the at least one measuring tube, wherein the at least one sensor magnet is arranged on the at least one measuring tube;

a receiving module, comprising:
a receptacle configured to receive the measuring tube module;
at least one excitation coil on the vibration exciter including an excitation coil winding in magnetic effect with the at least one excitation magnet;
at least one sensor coil on the vibration sensor including a sensor coil winding in magnetic effect with the at least one sensor magnet; and
a receiving module body, which includes an electrically conductive and ferromagnetic material, at least in sections, wherein the receiving module body includes an inner lateral surface and an outer lateral surface, wherein the receiving module body includes at least one opening that extends from the inner lateral surface to the outer lateral surface,
wherein a coil holder for the excitation coil and/or sensor coil is disposed in the at least one opening, wherein the coil holder comprises a coil holder body, and wherein the coil holder body is made of an electrically insulating material,
wherein the excitation coil winding has an excitation coil plane delimiting in the coil longitudinal direction and/or the sensor coil winding has a sensor coil plane delimiting in the coil longitudinal direction, wherein the excitation coil plane and/or the sensor coil plane face the receptacle,
wherein the at least one excitation coil and the at least one sensor coil each have a coil diameter,
wherein the at least one opening includes an opening lateral surface,
wherein the excitation coil and/or the sensor coil each have a minimum distance from the opening lateral surface at least equal to the coil diameter, and

wherein the at least one excitation magnet includes an excitation magnet end face facing the at least one opening and/or the sensor magnet includes a sensor magnet end face facing the at least one opening; and
a measuring and/or operating circuit configured to apply an excitation signal to the at least one excitation coil and to detect a sensor signal on the at least one sensor coil.

2. The flowmeter of claim 1 , wherein the coil holder body extends, at least in sections, between the excitation coil plane and the excitation magnet end face and/or extends, at least in sections, between the sensor coil plane and the sensor magnet end face.

3. The flowmeter of claim 1 , wherein the wherein the excitation coil and/or the sensor coil has a minimum distance at least equal to twice the coil diameter from the opening lateral surface.

4. The flowmeter of claim 1 , wherein the at least one excitation magnet and/or the at least one sensor magnet each have a magnetic diameter,
wherein the measuring tube module is arranged in the receptacle such that the at least one excitation magnet and/or the at least one sensor magnet each have a minimum distance of more than two times the magnetic diameter to the opening lateral surface of the receiving module body.

5. The flowmeter of claim 4 , wherein the measuring tube module is arranged in the receptacle such that the at least one excitation magnet and/or the at least one sensor magnet each have a minimum distance of more than three times the magnetic diameter to the opening lateral surface of the receiving module body.

6. The flowmeter of claim 1 , wherein the coil holder is disposed in the at least one opening in a liquid-tight manner.

7. The flowmeter of claim 1 , wherein the coil holder is inserted and fastened from the outer lateral surface into the at least one opening.

8. The flowmeter of claim 1 , wherein exactly one coil holder is disposed in the at least one opening,
wherein the at least one excitation coil and the at least one sensor coil are arranged on the exactly one coil holder.

9. The flowmeter of claim 1 , wherein the coil holder includes a coil body for the at least one excitation coil and/or a coil body for the at least one sensor coil,
wherein the at least one excitation coil is formed by a winding of an electrical conductor on the coil body and/or the at least one sensor coil is formed by a winding of an electrical conductor on the coil body.

10. The flowmeter of claim 1 , wherein the coil holder incorporates, at least in sections, a material that is transparent to an optical sensor,
wherein the optical sensor is disposed external to the receptacle of the receiving module body, and
wherein the optical sensor is configured to determine a further process variable through the transparent section.

11. The flowmeter of claim 10 , wherein the optical sensor is a temperature sensor.

12. The flowmeter of claim 1 , wherein the coil holder incorporates, at least in sections, a material that is permeable to radio waves,
wherein the receiving module further comprises an RFID reader, and
wherein the measuring tube module further comprises a RFID transponder.

13. The flowmeter of claim 12 , wherein the coil holder is, at least in sections, permeable to radio waves in a frequency range of 30 to 500 KHz.

14. The flowmeter of claim 1 , wherein the measuring tube module is configured to be mechanically detachably connected to the receiving module.

15. The flowmeter of claim 1 , wherein the excitation coil and/or the sensor coil are at least partially embedded in the coil holder.

Assignees

• Flowtec Ag

Inventors

• Bitto Ennio
• Schwenter Benjamin
• Werner Marc
• Pohl Johan

Classifications

• G01F1/8427

  detectors · CPC title

• G01F1/8422

  exciters · CPC title

• G01F15/18

  Supports or connecting means for meters · CPC title

• G01F1/8409

  constructional details · CPC title

• G01F1/8477 Primary

  with multiple measuring conduits · CPC title