Process flow plate with temperature measurement feature

• US 6,543,297 B1
• Filed: 09/13/1999
• Issued: 04/08/2003
• Est. Priority Date: 09/13/1999
• Status: Expired due to Term

• Current Assignee: Rosemount Incorporated (Emerson Electric Company)
• Original Assignee: Rosemount Incorporated (Emerson Electric Company)
• Inventors: Kleven, Lowell
• Primary Examiner(s): Patel, Harshad
• Assistant Examiner(s): Mack, Corey D.
• Application Number:
  US09/395,688
• Time in Patent Office: 1,303 Days
• Field of Search: 738/614--86, 732/026.5
• US Class Current: 73/861.52
• CPC Class Codes: F16L 23/006 Attachments
• CPC Class Codes: G01F 1/363 with electrical or electro-mechanical indication G01F1/37 and G01F1/38 take precedence
• CPC Class Codes: G01F 1/42 Orifices or nozzles
• CPC Class Codes: G01K 13/02 for measuring temperature of moving fluids or granular materials capable of flow

Abstract

A differential flow plate insertable into a flow path including a flow interrupter extending about an outer periphery of the flow path forming a constricted flow opening and a temperature sensor channel disposed proximate to the flow interrupter.

Claims

1. A flow plate with a temperature measurement feature insertable into a flow path comprising:

a flow interrupter extending about an outer periphery of the flow path forming at least one constricted flow opening; and

a temperature sensor channel enclosed within the flow interrupter, wherein the temperature sensor channel includes a temperature sensor.

2. The flow plate of claim 1 wherein flow plate includes a sensor channel closure.

3. The flow plate of claim 1 wherein the temperature sensor is a resistive temperature device.

4. The flow plate of claim 1 wherein the temperature sensor is a thermocouple.

5. The flow plate of claim 1 including a flow conduit supporting the flow interrupter and the flow conduit including first and second pressure taps on opposed sides of the flow interrupter and the flow conduit is seamless between the flow interrupter and the first and second pressure taps.

6. A flow device with high temperature sensing feature comprising:

a flow plate including a flow interrupter extending about an outer periphery of a flow pipe forming at least one constricted flow opening;

a temperature sensor channel enclosed within the flow interrupter wherein the temperature sensor channel includes a temperature sensor;

first and second pressure taps on opposed sides of the flow interrupter;

a pressure sensor coupled to the first and second pressure taps; and

a transmitter coupled to the sensor.

7. The flow device of claim 6 wherein the temperature sensor channel includes a temperature sensor.

8. The flow device of claim 7 wherein the temperature sensor is electrically coupled to the transmitter.

9. The flow device of claim 7 wherein the temperature sensor is electrically coupled to a computer.

10. The flow device of claim 6 wherein the transmitter is electrically coupled to a distributed control system.

11. The flow plate of claim 6 wherein the transmitter is electrically coupled to a computer.

12. The flow device of claim 6 including a flow conduit supporting the flow interrupter and first and second pressure taps, the flow conduit is seamless between the flow interrupter and first and second pressure taps.

13. A method for measuring process variables comprising:

constricting flow of fluid along a flow path with a flow plate;

measuring differential pressure across the constricted flow; and

measuring temperature of the constricted flow proximate a constriction point wherein a temperature sensor is enclosed within the flow plate.

14. The method of claim 13 further comprising:

transmitting measured differential pressure and temperature of constricted flow to a computer.

15. The method of claim 14 further comprising:

calculating mass flow rate based upon measured differential pressure and temperature.