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Thermowell

A technology for thermometers and casings, which can be used in thermometers, thermometer parts, measuring devices, etc., to solve problems such as casing breakage, leakage, and accidents.

Inactive Publication Date: 2014-03-05
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the thermometer casing commonly used in the chemical industry is used in the temperature measurement of the chemical process. Under the action of the process fluid, the casing immersed in the fluid will vibrate due to the vortex shedding. When the vibration frequency is close to the natural frequency of the casing, then Resonance may occur, causing the stress of the fluid on the casing to exceed the bearing limit of the casing, causing the casing to break, causing leakage, and damaging the temperature detection element inserted in the casing, affecting temperature measurement, and even accidents

Method used

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Embodiment Construction

[0009] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0010] As shown in the accompanying drawings, a thermometer sleeve of the present invention includes a tube body 1, a thermometer mounting hole 2 is opened inside the tube body, the outer wall of the tube is oval, and the thermometer mounting hole It is circular, and the axis of the thermometer mounting hole is parallel to and offset from the axis of the pipe body.

[0011] Preferably, the axis of the thermometer installation hole is located in the vertical plane where the major axis of the outer wall of the oval tube is located.

[0012] The method of using the device is as follows: the temperature measuring element 3 is inserted into the thermometer installation hole 2 in the pipe body 1 . The installation method of the thermowell can be selected according to the working conditions, such as flange, welding, threaded and other installation ...

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Abstract

The invention discloses a thermowell. The thermowell comprises a tube body, wherein a thermometer installation hole is formed inside the tube body, the outer wall of the tube body is oval, the thermometer installation hole is round, the axis of the thermometer installation hole is parallel to the axis of the tube body, and the axis of the thermometer installation hole is deviated from the axis of the tube body. The thermowell has the advantages that when an oval long-axis portion of the tube body right faces the flowing direction of fluid, the change of a flow field is quite little after the fluid flows through the thermowell, and compared with a cylindrical thermowell, the thermowell generates no eddy; in addition, due to the fact that a temperature measurement component is arranged eccentrically, compared with a thermowell of a symmetrical structure, the thermowell of the eccentric structure has the advantages that the change of the inherent frequency of the thermowell is larger relative to the that the central position of the symmetrical thermowell, and the resonance caused by the identical frequency between the thermowell and the fluid is reduced to a great extent.

Description

technical field [0001] The invention relates to a sleeve tube of a temperature measuring element, which is suitable for industrial measurement of bimetallic thermometers, thermocouples and thermal resistances. Background technique [0002] At present, the thermometer casing commonly used in the chemical industry is used in the temperature measurement of the chemical process. Under the action of the process fluid, the casing immersed in the fluid will vibrate due to the vortex shedding. When the vibration frequency is close to the natural frequency of the casing, then Resonance may occur, causing the stress of the fluid on the casing to exceed the bearing limit of the casing, causing the casing to break, resulting in leakage, and damage to the temperature detection element inserted in the casing, affecting temperature measurement, and even accidents. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and ...

Claims

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Application Information

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IPC IPC(8): G01K1/08
Inventor 齐菲赵柱
Owner CHINA TIANCHEN ENG
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