CN106768445B - A kind of quick response temperature thermocouple - Google Patents
A kind of quick response temperature thermocouple Download PDFInfo
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- CN106768445B CN106768445B CN201611249105.6A CN201611249105A CN106768445B CN 106768445 B CN106768445 B CN 106768445B CN 201611249105 A CN201611249105 A CN 201611249105A CN 106768445 B CN106768445 B CN 106768445B
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- thermocouple
- metal joint
- quick response
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The invention discloses a kind of quick response temperature thermocouples, including the different thermocouple wire of two ingredients, two thermocouple wires are connected in hot junction by metal joint, the metal joint is directly contacted with measured target body, the metal joint material therefor is red copper or the alloy containing at least one of Si, Fe, Al, Ni, Cr element, the heat of thermocouple disclosed by the invention is conducted by the sequence of testee-metal joint, realizes the quick response of thermocouple.
Description
Technical field
The invention belongs to Casting Equipment technical field, more particularly, to it is a kind of can quick response temperature thermocouple.
Background technology
Thermocouple is common temperature element in temperature measuring instrument, the basic principle of thermocouple temperature measurement be two kinds of differences at
Part material conductor form closed circuit, when both ends when temperature gradient, in circuit there are just having electric current to pass through, at this time both ends it
Between there is measurable thermo-electromotive force.The homogeneous conductor of two kinds of different components is thermode, and the higher one end of temperature is work
End or measurement end, hot junction, the lower one end of temperature are free end or reference end, cold end.According to thermo-electromotive force and temperature
Functional relation, in free end temperature at 0 DEG C under conditions of obtain thermocouple indexing table, different thermocouples has difference
Phasing meter.If there is the temperature difference working end of thermocouple with reference end, display instrument can indicate the heat that thermocouple generates
Temperature value corresponding to potential.The thermoelectricity of thermocouple moves heat and will increase as measurement end temperature increases, its size and heat
Galvanic couple material is related with the temperature at both ends.
Common thermocouple can be divided into the non-standard thermocouple two major classes of standard hot even summation.Standard couple refers to national standard
The relationship, allowable error and the thermocouple for having unified standard phasing meter of its thermoelectrical potential and temperature are defined, it has mating with it
Display instrument it is alternative.Nonstandardized technique thermocouple is mainly used for the measurement of certain special occasions.Standardized thermocouple China
From 1 day January in 1988, thermocouple and thermal resistance were all produced by IEC international standards, and specified seven kinds of S, B, E, K, R, J, T
Standardized thermocouple is China's Uniting type thermocouple.Common thermocouple model thermocouple Graduation Number thermode materials'use temperature
Spending (DEG C) is：
The pure platinum 0-1600 of S platinum-rhodium alloys (rhodium content 10%)
The pure platinum 0-1600 of R platinum-rhodium alloys (rhodium content 13%)
B platinum-rhodium alloys (rhodium content 30%) platinum-rhodium alloy (rhodium content 6%) 0-1800
K nickel chromium triangle nisiloys 0-1300
T fine copper cupro-nickels 0-350
J iron cupro-nickels 0-+500
N nickel chromium triangle tantnickel silicon 0-+800
E nickel chromium triangle cupro-nickels 0-600.
The thermocouple of industrial thermometric, essential structure include thermocouple silk material, insulation tube, protection pipe and terminal box etc.,
Thermocouple wire welds to form temperature measurement node point in hot junction, and rear end is separately connected compensating end, and thermocouple wire is loaded on insulating materials filling
In sealing sleeve pipe, when measurement, casing outer end is usually additionally provided with protection pipe, and metal sleeve leading portion is contacted testee, measured object
When being higher than metal sleeve temperature of body, heat is with the sequence of testee-casing-insulating materials (or air)-temperature measurement node point
Conduction, makes temperature measurement node point reach temperature identical with testee, then measures, during being somebody's turn to do, since heat is by gold
Belong to casing and insulating materials (or air) needs the regular hour, the thermal conductivity of especially insulating materials or air is very low, therefore
Cause existing armoured thermocouple low-response.
Invention content
In order to solve the above technical problems, the present invention provides a kind of temperature thermocouples of quick response.
The complete technical solution of the present invention includes：
A kind of quick response temperature thermocouple, including thermocouple wire that two ingredients are different, which is characterized in that described two
Thermocouple wire is connected in hot junction by metal joint, and the metal joint is directly contacted with measured target body, the metal joint
Material therefor is red copper or the alloy containing at least one of Si, Fe, Al, Ni, Cr element.
A kind of quick response temperature thermocouple, including two thermocouple wires, two thermocouple wire material therefors difference
For NiCr alloys and NiSi alloys, which is characterized in that two thermocouple wires are connected in hot junction by metal joint, the gold
Belong to connector directly to contact with measured target body, the metal joint material therefor is red copper or pure nickel or nickel-base alloy.
A kind of quick response temperature thermocouple, including two thermocouple wires, two thermocouple wire material therefors difference
For NiCrSi alloys and NiSi alloys, which is characterized in that two thermocouple wires are connected in hot junction by metal joint, described
Metal joint is directly contacted with measured target body, and the metal joint material therefor is red copper or pure nickel or nickel-base alloy.
A kind of quick response temperature thermocouple, including two thermocouple wires, two thermocouple wire material therefors difference
For fine copper and CuNi alloys, which is characterized in that two thermocouple wires are connected in hot junction by metal joint, and the metal connects
Head is directly contacted with measured target body, and the metal joint material therefor is red copper or copper alloy or nickel or nickel alloy.
A kind of quick response temperature thermocouple, including two thermocouple wires, two thermocouple wire material therefors difference
For iron and CuNi alloys, which is characterized in that two thermocouple wires are connected in hot junction by metal joint, the metal joint
It is directly contacted with measured target body, the metal joint material therefor is red copper or copper alloy or iron or ferroalloy.
A kind of quick response temperature thermocouple, including two thermocouple wires, two thermocouple wire material therefors difference
For nickel chromium triangle and corronil, which is characterized in that two thermocouple wires are connected in hot junction by metal joint, and the metal connects
Head is directly contacted with measured target body, and the metal joint material therefor is red copper or copper alloy or nickel or nickel alloy.
Preferably, above-mentioned thermocouple is placed in the casing of insulating materials filling, and the metal joint is located at outside casing.
Preferably, it is realized and is insulated by insulating materials between metal joint and casing.
Using the method for above-mentioned thermocouple temperature measurement, metal joint is in direct contact testee, thermocouple wire rear end connects
It connects compensating wire or is directly connected to display device.
The present invention compared with the existing technology the advantages of be：Thermocouple wire leading portion connects metal joint, and metal joint directly connects
Touch testee, in thermometric, metal joint that is, thermocouple hot junction, heat passes through testee-metal joint
Sequence is conducted, and the quick response of thermocouple is realized, and metal joint insulate with the thermocouple part in addition to thermocouple wire, avoids
Interference.
Description of the drawings
Fig. 1 is the quick response temperature thermocouple structural schematic diagram of the present invention.
In figure：1- casings, 2- insulating materials, 3- thermocouple wires, 4- felt pads, 5- metal joints.
Specific implementation mode
By taking K-type thermocouple as an example, in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, quick response thermocouple disclosed by the invention, including two thermocouple wires 3, two thermocouple wires 3
Material therefor is respectively NiCr alloys and NiSi alloys, and thermocouple wire 3 is located in protection sleeve pipe 1, and insulation material is filled in casing 1
Material 2, two thermocouple wires 3 are connected in hot junction by metal joint 5, and the metal joint is using red copper or pure nickel or nickel-base alloy
It is made, there is felt pad 4 between metal joint 5 and casing 1, in thermometric, thermometric such as is carried out to the mold of aluminum alloy low-pressure casting,
Metal joint 5 is inserted directly into the thermometer hole of mold and is contacted with mold wall, and heat is directly transferred to gold by mold wall when thermometric
Belonging to connector, the contact point of metal joint and mold wall is that is, the hot junction of thermocouple or temperature measurement node point at this time, it is thus achieved that
The quick response of thermocouple, metal joint insulate with the thermocouple part in addition to thermocouple wire, avoid interference.
The above is only presently preferred embodiments of the present invention, is not imposed any restrictions to the present invention, every according to the present invention
Technical spirit changes any simple modification, change and equivalent structure made by above example, still falls within skill of the present invention
In the protection domain of art scheme.
Claims (6)
1. a kind of quick response temperature thermocouple, including thermocouple wire (3) that two ingredients are different；Two ingredients are different
Thermocouple wire (3) is placed in the casing (1) of insulating materials (2) filling；The working end of quick response temperature thermocouple and tested mesh
Standard type contacts；
It is characterized in that, the different thermocouple wire (3) of two ingredients is only connected by metal joint (5) in hot junction, and should
Metal joint (5) is fully located at the casing (1) outside；Metal joint (5) material therefor be red copper or containing Si, Fe, Al,
The alloy of at least one of Ni, Cr element；
Metal joint (5) and casing (1) are equipped with felt pad (4) to ensure that heat only passes between the end face of working end
Thermocouple wire (3) and be not transferred to casing (1), and the metal joint (5) with casing (1) close to working end above-mentioned end face phase
To face it is parallel with the above-mentioned end face of close working end of casing (1)；
The quick response temperature thermocouple is to carry out thermometric to the mold of aluminum alloy low-pressure casting.
2. a kind of quick response temperature thermocouple according to claim 1, which is characterized in that two ingredient differences
Thermocouple wire (3) material therefor be respectively NiCr alloys and NiSi alloys, metal joint (5) material therefor be red copper or
Pure nickel or nickel-base alloy.
3. a kind of quick response temperature thermocouple according to claim 1, which is characterized in that two ingredient differences
Thermocouple wire (3) material therefor be respectively NiCrSi alloys and NiSi alloys, metal joint (5) material therefor is red copper
Or pure nickel or nickel-base alloy.
4. a kind of quick response temperature thermocouple according to claim 1, which is characterized in that two ingredient differences
Thermocouple wire (3) material therefor be respectively fine copper and CuNi alloys, metal joint (5) material therefor is that red copper or copper close
Gold or nickel or nickel alloy.
5. a kind of quick response temperature thermocouple according to claim 1, which is characterized in that two ingredient differences
Thermocouple wire (3) material therefor be respectively iron and CuNi alloys, metal joint (5) material therefor is red copper or copper alloy
Or iron or ferroalloy.
6. a kind of quick response temperature thermocouple according to claim 1, which is characterized in that two ingredient differences
Thermocouple wire (3) material therefor be respectively nickel chromium triangle and corronil, metal joint (5) material therefor is that red copper or copper close
Gold or nickel or nickel alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611249105.6A CN106768445B (en) | 2016-12-29 | 2016-12-29 | A kind of quick response temperature thermocouple |
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| CN201611249105.6A CN106768445B (en) | 2016-12-29 | 2016-12-29 | A kind of quick response temperature thermocouple |
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| CN106768445B true CN106768445B (en) | 2018-10-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414106B (en) * | 2018-02-08 | 2019-07-12 | 北京航空航天大学 | A kind of casting mould quick response temperature thermocouple |
| CN108387320B (en) * | 2018-02-08 | 2019-07-12 | 北京航空航天大学 | A kind of permanent mold casting quick response temperature thermocouple |
| CN110231100B (en) * | 2019-06-29 | 2021-08-20 | 潍柴动力股份有限公司 | Temperature measuring piston and thermocouple installation method thereof |
| CN117191209A (en) * | 2023-11-07 | 2023-12-08 | 滨州泽郦精密金属科技有限公司 | Quick response temperature thermocouple for metal mold casting |
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| JP2007057430A (en) * | 2005-08-25 | 2007-03-08 | Nidec-Read Corp | Contact-type thermometer |
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| CN101266174A (en) * | 2007-03-14 | 2008-09-17 | 苏州新长光热能科技有限公司 | Thermocouple unit for casting ingot heating stove measuring aluminum ingot temperature |
| CN101614598A (en) * | 2008-06-27 | 2009-12-30 | 新奥科技发展有限公司 | A kind of thermocouple assembly that is used for measuring underground gasification temperature |
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