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

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

Inactive Publication Date: 2009-12-16
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 measuring elements, in particular to a nickel-based armored thermocouple made of the same material as the outer sleeve and the positive pole wire, including a metal outer sleeve and positive and negative thermocouple wires with insulation placed in the outer sleeve. The armored thermocouple is a flexible and practical combination made of oxides with positive and negative wires insulated in the outer casing and then compacted. The positive and negative wires built in the outer casing are a set , the outer casing and the positive pole wire have the same material, and the present invention can be mainly applied to high-temperature nickel-chromium-silicon-nickel-silicon-magnesium armored thermocouples and nickel-chromium-nickel-silicon armored thermocouples. The maximum operating temperature of the thermocouple is up to 1280°C, the high temperature stability above 1000°C is good, the temperature drift is less than ±3°C above 1000°C, and the service life is extended.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/32
Inventor 王魁汉袁勤华
Owner 袁勤华
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