Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thermowell vibration frequency diagnostic

A thermocouple well, vibration frequency technology, applied in the direction of measuring vibration, vibration measurement in fluids, thermometers with electric/magnetic elements directly sensitive to heat, etc., capable of solving environmental damage or other dangers, shutdowns, fires, etc. question

Active Publication Date: 2012-05-23
ROSEMOUNT INC
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oscillations at the natural frequency of the thermowell can cause the thermowell to fail due to fatigue and eventually crack or even disconnect
This failure can cause the temperature sensor to fail and the entire process to require a shutdown
In some processes, any rupture in the process shield, such as a broken thermowell, could result in fire, environmental damage, or other hazardous conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thermowell vibration frequency diagnostic
  • Thermowell vibration frequency diagnostic
  • Thermowell vibration frequency diagnostic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] In general, the present invention includes methods and apparatus for measuring a thermowell vibration frequency in a process and comparing the frequency to a natural frequency of the thermowell. This can be performed by a transmitter electrically connected to an accelerometer fixedly connected to the thermowell. If a thermowell is found to vibrate near its natural frequency, an alarm can be sounded, signaling to the user that thermowell failure may be imminent.

[0017] Figure 1A is a cross-sectional view of the temperature measurement point 10. According to one embodiment, the temperature measurement point 10 includes a transmitter 12 (which includes a housing 14, a housing bore 18, a transmitter circuit 20, a temperature sensor terminal 22 and a vibration sensor terminal 24), a temperature sensor 26 (which including protection tube 27, temperature sensor tip 28 and temperature sensor wire 30), vibration sensor 32 (which includes vibration sensor wire 34), thermowell...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An apparatus and a method monitor condition of a temperature measurement point in an industrial process system by sensing vibration frequency of a thermowell positioned in a process fluid flow passage and providing a diagnostic output based upon the vibration frequency sensed. The apparatus includes a temperature measurement point having a thermowell, a vibration sensor, a temperature sensor, and a transmitter. The vibration sensor is fixedly attached to the thermowell, and the temperature sensor is positioned inside a bore cavity of the thermowell. The transmitter is electrically connected to both the temperature sensor and the vibration sensor.

Description

technical field [0001] The present invention relates to a thermowell and, in particular, to thermowell vibration. Background technique [0002] Thermowells are used in the process control industry to house temperature sensors. Thermowells are usually long cylindrical tubes that are sealed at one end and open at the other. A temperature sensor is inserted into the open end of the thermowell, and the thermowell is inserted into the process fluid. This arrangement allows the temperature sensor to measure the temperature of the process fluid without direct exposure to the process fluid. This can help protect the temperature sensor when the process fluid is a hazard to the temperature sensor. [0003] In many applications, a thermowell is inserted into a process where the process fluid flows over and around the thermowell. This can cause turbulence, eddies, and vortices, which can cause the thermowell to vibrate. In some cases, this vibration can cause the thermowell to osci...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01K1/14G01K13/02G01K7/00G01H3/06G01H3/04G01P15/00
CPCG01K15/007G01K15/00G01K1/08G01K13/02
Inventor 迪尔克·维利·鲍施科劳拉·艾维·考查克杜妍·梦-诗·彭
Owner ROSEMOUNT INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com