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Method for manufacturing variable cross section of N-shaped sheathed thermocouple

A technology of armored thermocouples and variable cross-sections, which is applied in the manufacture/processing of thermoelectric devices, wire drawing dies, etc., can solve the problems of not being able to meet mass production and the low efficiency of swaging methods, and achieve accuracy and reliability , the effect of improving work efficiency

Active Publication Date: 2015-06-17
CHONGQING MATERIALS RES INST
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Problems solved by technology

Due to the low working efficiency of the rotary forging method, during the processing process, the processed blank needs to be annealed multiple times, and only 2 thermocouples with variable cross-section can be rotated at most every day, which cannot meet the needs of mass production.

Method used

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  • Method for manufacturing variable cross section of N-shaped sheathed thermocouple
  • Method for manufacturing variable cross section of N-shaped sheathed thermocouple
  • Method for manufacturing variable cross section of N-shaped sheathed thermocouple

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Embodiment Construction

[0031] see Figure 1-Figure 5 :

[0032] The preparation method of the N-type (N-type armored thermocouple wire positive pole nickel chromium silicon, negative pole nickel silicon magnesium) armored thermocouple variable cross-section has the following steps:

[0033] 1) Take two nickel-chromium-silicon (positive pole) thermocouple wires 9 and two nickel-silicon-magnesium (negative pole) thermocouple wires 10, straighten and clean them, and then insert them into the insulating porcelain pillars that have been fired at high temperature according to the polarity difference In the process, through shaping, ensure that there is no defect and a gap greater than 10mm between any two adjacent sections of each section of insulating ceramic column that penetrates the pair of wires. Then the insulated porcelain column that has been adjusted and worn with even wires is inserted into the metal tube 7 that has been scrubbed clean. The metal tube of the present invention is a stainless ste...

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Abstract

The invention relates to a method for manufacturing a variable cross section of an N-shaped sheathed thermocouple. The diameter of the sheathed thermocouple meeting the performance requirements is reduced from fai4mm to fai3.5mm to finish a primary reducing, the diameter of an end head of a small diameter of the sheathed thermocouple subjected to the primary reducing is rolled to be smaller than that of a second reduced diameter so as to form a roll head, and the diameter is reduced from fai3.5mm to fai3.2mm so as to finish second reducing. The method for manufacturing the variable cross section of the N-shaped sheathed thermocouple is accurate and complete in measuring result, good in stability, high in reliability and quick in response, further has the advantages of being good in consistency, and can be used for large-batch production.

Description

technical field [0001] The invention relates to a thermocouple, in particular to a method for preparing a sheathed thermocouple with variable cross-section, and a high-precision, high-stability, high-reliability, and fast-response temperature sensor. Background technique [0002] Temperature sensors are more and more widely used in special environments such as power stations. In order to meet the high requirements for temperature sensors in my country's vigorously developed electric power, ensure the safety of energy supply in my country, and realize the optimization and sustainable development of the power industry structure, it is necessary to develop a High precision, high stability, high reliability, fast response temperature sensor. At present, the temperature sensors used in power stations on the market use K-type armored thermocouples (the positive grade of the thermocouple wire of the K-type armored thermocouple is nickel chromium, and the negative grade is nickel-sil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34B21C3/02H10N10/01
Inventor 张祖力王华罗松唐锐徐丽艳
Owner CHONGQING MATERIALS RES INST
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