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Nickel base sheathed thermocouple with outer tube having same material quality as anode couple silk

A technology of armored thermocouple and outer casing is applied in the field of temperature measuring elements, which can solve the problem that the thermocouple cannot meet the requirements of high temperature and stability, and achieve the effect of improving stability

Inactive Publication Date: 2008-07-30
袁勤华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new type of nickel-based armored thermocouple to overcome the deficiency that the existing nickel-based armored thermocouple cannot meet the high temperature and stability requirements

Method used

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  • Nickel base sheathed thermocouple with outer tube having same material quality as anode couple silk

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specific Embodiment 1

[0020] A nickel-chromium-silicon-nickel-silicon-magnesium armored thermocouple, the positive pole wire is made of nickel-chromium-silicon alloy, and the weight percentage of the nickel-chromium-silicon alloy is: 13.7-14.7% chromium, 1.2-1.6% silicon, no More than 0.01% of magnesium and the rest of nickel, the outer sleeve adopts the same nickel-chromium-silicon alloy tube as that of the positive wire.

specific Embodiment 2

[0021] A nickel-chromium-nickel-silicon armored thermocouple, the material of the positive pole wire is nickel-chromium alloy, the weight percentage of the nickel-chromium alloy is: 90% nickel and 10% chromium, and the outer casing is made of the same material as the positive pole wire Nichrome tubes of the same material.

[0022] In a word, because the prior art does not adopt the same material as the positive wire for the outer sleeve of the nickel-based armored thermocouple, the present invention makes the outer sleeve and the positive wire have the same material, so that the material of the outer sleeve is the same as that of the inside of the sleeve. The positive electrode of the thermocouple is the material of the same chemical composition, so it has good chemical and physical compatibility, avoids the diffusion of certain elements at high temperature, and avoids the drastic change of thermoelectric potential; at the same time, due to the elimination of different material...

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Abstract

The invention relates to the technical field of temperature measurement element, in particular to a nickel-based sheathed thermocouple with an outer sleeve and a positive thermocouple wire made of the same material, which comprises an metal outer sleeve, and a positive and a negative thermocouple wire insulatively arranged in the outer sleeve, wherein the outer sleeve and the positive thermocouple wire are made of the same material. The invention is mainly used for high-temperature NiCrSi-NiSiMg sheathed thermocouple and NiCr-NiSi sheathed thermocouple. The sheathed thermocouples is of good stability at a high temperature above 1,000 DEG C with a temperature drift less than plus or minus 3 DEG C and with a maximum operation temperature of 1,280 DEG C, which prolong service life.

Description

technical field [0001] The invention relates to the technical field of temperature measuring elements, in particular to a nickel-based armored thermocouple with an outer casing and a positive pole wire made of the same material. Background technique [0002] Armored thermocouples are thermocouples made with armored thermocouple cable. It is a flexible and practical combination made by placing thermocouple wire insulation in a metal casing with oxide and compacting it. It has the characteristics of small size, sensitive temperature, pressure resistance, shock resistance, corrosion resistance and free bending. [0003] Armored thermocouples are suitable for temperature measurement of complex parts. They are widely used in metallurgy, electric power, petroleum, chemical industry, aviation, shipbuilding and national defense scientific research departments for oxidizing, neutral, reducing and other working atmospheres as temperature measuring elements. [0004] At present, the ...

Claims

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Application Information

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IPC IPC(8): H01L35/32
Inventor 王魁汉袁勤华
Owner 袁勤华
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