CN101373154A - Method for processing hot end of armored micro thermocouple - Google Patents
Method for processing hot end of armored micro thermocouple Download PDFInfo
- Publication number
- CN101373154A CN101373154A CNA200810063443XA CN200810063443A CN101373154A CN 101373154 A CN101373154 A CN 101373154A CN A200810063443X A CNA200810063443X A CN A200810063443XA CN 200810063443 A CN200810063443 A CN 200810063443A CN 101373154 A CN101373154 A CN 101373154A
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- China
- Prior art keywords
- hot end
- armored
- armouring
- thermocouple
- hot junction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title abstract description 3
- 238000003466 welding Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000008034 disappearance Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The invention relates to a method for processing a hot end of an armored micro thermocouple, belonging to the field of temperature instrument testing. The hot end of the armor material is flattened by 1mm and then welded into a thermocouple, thereby solving the problem of diameter shrinkage and even disconnection of the electrode alloy caused by the traditional manufacture of the hot end into a hemispherical shape. Not only the yield and the temperature measurement reliability are greatly improved, but also the service life of the armored micro thermocouple is greatly prolonged.
Description
Technical field
The present invention relates to armoring superfine thermo-electric couple hot end processing method, belong to temperature test instrument field.
Technical background
Armoured thermocouple can be chosen the different armouring alloy materials and the thermode of different-diameter according to different thermometric medium and working temperature.But any is arranged is substantially invariable, and promptly in the drawing of thermopair armour material, its armour wall thickness accounts for the 10-15% of this type thermopair diameter, and thermometric thermode diameter accounts for the 15-20% of this type thermopair diameter.The armoured thermocouple of thermometric electrode diameter ∠ 1mm is called the armouring superfine thermo-electric couple.
Tradition armoured thermocouple hot junction all becomes " dome-type ", and position, instant heating end is removed partially filled medium and welded then, claims body contact type thermopair again.When armoring superfine thermo-electric couple hot end was made of this classic method, yield rate was very low, and serviceable life is short.Use the X-ray Radiographic test RT, obviously find out up to 90% above product thermometric wire electrode to produce the undergauge phenomenon, 10% product when making, its thermometric electrode even disconnected.
Trace it to its cause, when weld in tradition " dome-type " armoured thermocouple hot junction, hot junction interpolation welding alloy and both quality of armour wall alloy are far longer than the quality of a pair of thermode alloy, when weld metal solidified, the pulling force of generation forced the minimum a pair of thermometric electrothermal alloy of its three's intensity to produce undergauge phenomenon even disconnection.
Summary of the invention
The thermometric electrode undergauge that the present invention occurs when being primarily aimed at the armoring superfine thermo-electric couple hot end moulding even the situation of disconnection put forward, and concrete grammar is with position, armour material hot junction flattening 1mm, to make armour material tube wall and a pair of thermode tightly interdependent, then welding.
Through the check of X-ray sheet, 95% above armouring superfine thermo-electric couple electrode no longer produces necking deformation, and electrode directly disconnects the phenomenon disappearance during welding, has only 5% can find out in the X-ray sheet that the thermode diameter has fine difference.
The problem of electrode undergauge even disconnection when the present invention efficiently solves the armoring superfine thermo-electric couple hot end moulding improves finished product rate and serviceable life greatly.
Description of drawings
Fig. 1, armouring superfine thermo-electric couple diagrammatic cross-section
Fig. 2, armouring superfine thermo-electric couple A is to diagrammatic cross-section
Among the figure, 1-armouring pipe, 2-thermometric electrode, 3-filled media, 4-hot junction
Specific embodiment
The present invention at first chooses the good armouring thermionic valves of suitable drawing, and it is made of armouring pipe 1, thermometric electrode 2 and filled media 3.Make an end in hot junction, scratch and remove partially filled medium 3, armouring pipe 1 flattens about 1mm, and this moment, thermometric electrode 2 tightly offseted with the armouring tube wall that flattens, and welding forms hot junction 4 then.
Micro-sheathed thermocouple hot junction involved in the present invention is through the check of X-ray sheet, and 95% above electrode metal no longer produces necking deformation, and electrode metal directly disconnects the phenomenon disappearance during welding, has only 5% can find out in the X-ray sheet that the thermode diameter has fine difference.
Claims (3)
1. the present invention relates to armoring superfine thermo-electric couple hot end processing method, principal character is that the armouring pipe that is made into the hot junction flattens 1mm, welding then earlier.
2. according to claim 1, the tube wall and the electrode metal of the fine thermionic valves of armouring after the flattening tightly offset.
3. according to claim 1,2, the armoured thermocouple hot junction of making becomes flat stripe shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810063443XA CN101373154A (en) | 2008-08-11 | 2008-08-11 | Method for processing hot end of armored micro thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810063443XA CN101373154A (en) | 2008-08-11 | 2008-08-11 | Method for processing hot end of armored micro thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101373154A true CN101373154A (en) | 2009-02-25 |
Family
ID=40447438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810063443XA Pending CN101373154A (en) | 2008-08-11 | 2008-08-11 | Method for processing hot end of armored micro thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101373154A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000800A (en) * | 2012-12-19 | 2013-03-27 | 重庆材料研究院 | Method for manufacturing variable cross section of N-shaped sheathed thermocouple |
-
2008
- 2008-08-11 CN CNA200810063443XA patent/CN101373154A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000800A (en) * | 2012-12-19 | 2013-03-27 | 重庆材料研究院 | Method for manufacturing variable cross section of N-shaped sheathed thermocouple |
| CN103000800B (en) * | 2012-12-19 | 2015-06-17 | 重庆材料研究院 | Method for manufacturing variable cross section of N-shaped sheathed thermocouple |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090225 |