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A protection tube for high temperature tungsten-rhenium thermocouple verification

A technology for protecting tubes and thermocouples, applied in thermometers, measuring heat, thermometer testing/calibration, etc., can solve problems such as different atmospheres, pollution calibration, deviation, etc., and achieve the effect of improving calibration conditions and reducing uncertainty

Active Publication Date: 2014-10-15
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem of calibration deviation caused by the different atmospheres and the pollution caused by the pair wire of the heating element in the furnace during the verification process of the tungsten-rhenium thermocouple.

Method used

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  • A protection tube for high temperature tungsten-rhenium thermocouple verification
  • A protection tube for high temperature tungsten-rhenium thermocouple verification
  • A protection tube for high temperature tungsten-rhenium thermocouple verification

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Embodiment 1

[0023] A protection tube 1 for high-temperature tungsten-rhenium thermocouple verification, including a protection tube 1, a standard radiation test hole 2, an upper tungsten grating 3, a lower tungsten grating 4, a sealing ring 5 and a flange 6; one end of the protection tube 1 It is in a closed state, called the lower end, and the other end is in an open state, called the upper end; the inner wall of the protection tube 1 adopts a two-stage stepped design, and the step near the lower end is higher than the other; the area of ​​the tube wall thickness is the uniform temperature area, It is also the temperature-sensing area of ​​the thermocouple to be calibrated, and other areas are non-uniform temperature areas; there is a standard radiation test hole 2 on the tube wall where the lower end of the protection tube 1 is in contact with the uniform temperature area, and the standard used for calibration is tested through this hole. The temperature of the thermocouple to be calibra...

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Abstract

The invention relates to a protective tube for detecting a high-temperature tungsten-rhenium thermocouple, and belongs to the field of high-temperature tungsten-rhenium thermocouple detection or calibration. The protective tube comprises a protective tube, an etalon radiation test hole, an upper tungsten piece grating, a lower tungsten piece grating, a sealing ring and a flange, wherein one end of the protective tube is in a closed state, and the other end of the protective tube is in an opened state; the inner wall of the protective tube adopts a two-level stepped design; a thick area of a tube wall is a uniform temperature area and is also a temperature sensing area of a calibration thermocouple, and the other areas of the tube wall are non-uniform temperature areas; the etalon radiation test hole is formed on the tube wall on the bottom of the lower end of the protective tube, and the bottom of the lower end of the protective tube is contacted with the uniform temperature area; and the two groups of tungsten piece gratings are arranged in the non-uniform temperature areas, one group is arranged in the boundaries of the uniform temperature area and the non-uniform temperature areas, and the other group is arranged in the middle of the non-uniform temperature areas. The uncertainty of a calibration result is reduced to the maximum extent, so that calibration conditions of the high-temperature tungsten-rhenium thermocouple at 3000 DEG C and blow are greatly improved.

Description

technical field [0001] The invention relates to a protection tube for testing a high-temperature tungsten-rhenium thermocouple, which belongs to the field of testing or calibration of a high-temperature tungsten-rhenium thermocouple. Background technique [0002] In the verification or calibration process of the tungsten-rhenium thermocouple, considering its need for the calibration atmosphere, it is necessary to isolate its existing environment during the calibration process, so a protection tube for high-temperature thermocouple verification is designed, which can protect the Thermocouples are protected at high temperatures to ensure they are free from oxidation and environmental contamination, allowing the calibrated thermocouple to truly reflect its performance. The tungsten-rhenium thermocouple calibration device includes six parts of the high-temperature furnace body, temperature control system, water cooling system, vacuum system, gas-filled protection system and data...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K15/00
Inventor 吕国义赵俭杨永军杨新园陈炜王晓璐
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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