Method of making a multivariable vortex flowmeter

Patent metadata

Field	Value
Publication number	US-2016202095-A1
Application number	US-201615079822-A
Country	US
Kind code	A1
Filing date	Mar 24, 2016
Priority date	May 12, 2014
Publication date	Jul 14, 2016
Grant date	—

Abstract

A method of making a sensor assembly for a vortex flowmeter includes securing a vortex sensor to a vortex sensor housing. The vortex sensor housing is secured to a sensor body that is configured to seal a process penetration opening to limit flow of process fluid out of the flowmeter through the process penetration opening. A pair of pressure-responsive diaphragms is secured to the vortex sensor housing such that the pressure-responsive diaphragms face outwardly from opposite sides of the housing and such that the vortex sensor is positioned to detect motion of at least one of the pressure-responsive diaphragms. A mounting hole is made in the sensor body spaced apart from the vortex sensor housing. A temperature sensor housing is secured to the sensor body through the mounting hole. A temperature sensor is inserted in the temperature sensor housing for sensing a temperature of the process fluid.

First claim

What is claimed is:

1 . A method of making a sensor assembly for a vortex flowmeter of the type having a flowtube having a flowtube wall defining a passage for flow of a process fluid through the flowtube, a bluff body in the flowtube for generating vortices, and a sensor for detecting vortices formed by the bluff body, the sensor assembly being configured to extend into contact with the process fluid through a process penetration opening, the method comprising:
securing a vortex sensor to a vortex sensor housing, the vortex sensor housing being secured to a sensor body configured to seal the process penetration opening to limit flow of process fluid from the passage out of the flowmeter through the process penetration opening; securing a pair of pressure-responsive diaphragms to the vortex sensor housing such that the pressure-responsive diaphragms face outwardly from opposite sides of the vortex sensor housing and such that the vortex sensor is positioned to detect motion of at least one of the pressure-responsive diaphragms to detect vortices formed in the process fluid; making a mounting hole in the sensor body spaced apart from the vortex sensor housing; securing a temperature sensor housing to the sensor body through the mounting hole; and inserting a temperature sensor in the temperature sensor housing for sensing a temperature of the process fluid.

2 . A method as set forth in claim 1 further comprising casting the sensor body and the vortex sensor housing as one piece.

3 . A method as set forth in claim 1 wherein the temperature sensor housing is configured to fit in the mounting hole as a press fit connection.

4 . A method as set forth in claim 1 further comprising bonding the temperature sensor housing with the sensor body at the mounting hole.

5 . A method as set forth in claim 4 wherein said bonding comprises laser welding the temperature sensor housing to the sensor body.

Assignees

• Invensys Sys Inc

Inventors

• Brosnihan Paul F
• Lopera Javier
• Talutis Stephen B

Classifications

• G01F1/3218 Primary

  bluff body design · CPC title

• G01F1/3209 Primary

  using Karman vortices · CPC title

• Y10T29/49968

  Metal fusion joining · CPC title

• Y10T29/49966

  with supplemental joining · CPC title

• G01F1/86

  Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure · CPC title