CN1076025A - Thermocouple verification furnace - Google Patents
Thermocouple verification furnace Download PDFInfo
- Publication number
- CN1076025A CN1076025A CN 93100127 CN93100127A CN1076025A CN 1076025 A CN1076025 A CN 1076025A CN 93100127 CN93100127 CN 93100127 CN 93100127 A CN93100127 A CN 93100127A CN 1076025 A CN1076025 A CN 1076025A
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- Prior art keywords
- sodium
- constant temperature
- temperature chamber
- thermostatic chamber
- valve
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- 238000012795 verification Methods 0.000 title abstract 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 77
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 77
- 239000011734 sodium Substances 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000008676 import Effects 0.000 claims description 12
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 235000015424 sodium Nutrition 0.000 description 60
- 239000000919 ceramic Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000003556 assay Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The existing thermocouple verification furnace is not suitable for precise verification of thermocouples embedded and distributed on a slender element due to the short isothermal zone and poor temperature field uniformity. The invention provides a thermocouple verification furnace, which takes liquid sodium as a working medium, a thermostatic chamber is in a vertical cylindrical shape and forms a sodium loop with a circulating pump and a main heater, the sodium is heated and then injected into the thermostatic chamber at a continuous constant temperature, the upper end of the thermostatic chamber is provided with a heat shielding layer, the exterior of the thermostatic chamber is provided with a heat compensator, so that the thermostatic chamber has no axial and radial heat loss, and a sodium overflow branch is arranged outside the thermostatic chamber in order to ensure that the sodium liquid level in the thermostatic chamber is not changed and the system can safely operate under low pressure. The length of the constant temperature area is 1298mm, and the uniformity of the axial temperature field is less than or equal to +/-0.1 ℃.
Description
The invention belongs to a kind of assay furnace of temperature sensor, be specifically a kind of be working medium with the liquid metal sodium, in 150 °～660 ℃ warm areas, has long especially isothermal region, and in this isothermal region the good electric thermo-couple test furnace of warm field uniformity, be used for the precision calibrating that setting-in is distributed in thermopair on the elongated member.
Usually need through strict calibrating before occasionally other temperature sensors use for the demanding thermoelectricity of temperature measurement accuracy, and be distributed in thermal resistance on the elongated member for setting-in, for example be used to measure the thermopair of temperature in the nuclear reactor heap, its measuring point is at the axial distribution distance, the calibrating of this class thermopair except that the working temperature that requires assay furnace be about 150 °～660 ℃, also require in this warm area, to have at least the isothermal region more than 1 meter, and warm field uniformity is good in this isothermal region.At present, the calibrating of thermopair in 150 °～660 ℃ warm areas, two warm areas of domestic common branch carry out, use the standard thermostatic oil groove below 300 ℃, the horizontal assay furnace of usefulness that surpasses 300 ℃ is finished, and the former is not high enough because of its working temperature, and the latter has only 15mm because of its isothermal region length, and a temperature unevenness all can not satisfy request for utilization up to ± 0.5 ℃; It is 50 °～1250 ℃ electric thermo-couple test furnace that BrP GB2158929A discloses a kind of working temperature, it is working medium with the air, comprise a hollow ball shell and be installed in the interior hollow ball shape well heater of spherical shell, be filled with heat insulation layer between spherical shell and the well heater, heater center is provided with the solid ceramic spheroid, one group of ceramic pipe that is used to adorn standard thermometer and tested thermopair passes spherical shell and well heater with being the horizontal radiation shape and gathers near the centre of sphere of solid ceramic spheroid, symmetry based on sphere, make in the Ceramic Balls and radially equate apart from the temperature that exists together mutually, its warm field uniformity is ± 0.25 ℃, yet this spherical assay furnace removes and has complex manufacturing technology, outside the installation accuracy height, requirement accomplishes on the radial distance very long in the solid ceramic ball that temperature all equates everywhere, and promptly having very long isothermal region is to be difficult to realize.
The purpose of this invention is to provide and a kind ofly in 150 °～600 ℃ warm areas, have long isothermal region, and in isothermal region the good electric thermo-couple test furnace of warm field uniformity.
The present invention is achieved in that a kind of electric thermo-couple test furnace comprises the shell that is installed on the base, being positioned at the constant temperature chamber of shell circulation actuating medium and being used for the heating work medium makes it reach constant working temperature and primary heater, be filled with heat insulation layer between shell and constant temperature chamber and the primary heater, the tubulose trap that is used for adorning tested thermopair and standard thermometer passes shell and extend into actuating medium in the constant temperature chamber, said constant temperature chamber is vertical cylindric, its underpart by pipeline and valve and be located at its bottom storage sodium jar connect into liquid metal sodium for, row path; The upper and lower import and export that has sodium in side, constant temperature chamber, it connects to form hermetic liquid metal sodium closed circuit by pipeline, ebullator and inside spin formula pipeline and primary heater, and is provided with the warm galvanic couple of sodium in inside spin formula pipe downstream, sodium inflow point; Upper end, constant temperature chamber is provided with thermal shield, is provided with expansion loop coaxial mounted with it outside the constant temperature chamber, is filled with heat insulation layer between expansion loop and the constant temperature chamber, and establishes the temperature difference heat galvanic couple on constant temperature cavity outer wall and expansion loop inwall; Be higher than sodium inflow point on the sidewall of constant temperature chamber and be provided with the sodium overflow vent, it connects to form sodium overflow branch road by the air cavity of pipeline, expansion box and surplus valve and storage sodium jar internal upper part; Storage sodium jar, expansion box, valve, surplus valve and all connecting tubes thereof are equipped with electric heater outward.
It is actuating medium that the present invention selects liquid metal sodium for use, Liquid Sodium is removed has good fluidity, has preferably outside the compatibility with other materials, and main is that the sodium metal fusing point is low, boiling point height under the normal pressure, the temperature range that is in a liquid state is wide, can satisfy 150 °～660 ℃, even higher thermocouple calibration working temperature, and its heat-conductive characteristic is better than empty G﹠O, thermal capacity is big, and a formed temperature temperature stability is good, and the temperature field evenly; Electric thermo-couple test furnace is designed to the loop form of constant temperature chamber and the discrete layout of primary heater, liquid metal sodium is heating and make it inject the constant temperature chamber with continuous stationary temperature by the control of the warm galvanic couple of sodium and accurate temperature controller in primary heater, rather than in the constant temperature chamber, heat, so do not have other thermals source that disturb the sodium temperature in the constant temperature chamber, cause the sodium temperature stable; Be provided with thermal shield at upper end, constant temperature chamber standard thermometer trap and tested thermopair trap insert division, avoided the axial heat loss in constant temperature chamber, at constant temperature chamber peripheral hardware expansion loop, by the accurate temperature controller control of temperature-difference thermoelectric even summation, make that temperature difference perseverance is 0 ℃ between itself and the constant temperature chamber, make the constant temperature chamber radially thermal loss exist hardly, also has heat insulation layer outside the constant temperature chamber, this has just guaranteed that axially and directly upwards temperature altitude is even in the constant temperature chamber, therefore can design the constant temperature chamber longlyer, and sodium advances in long constant temperature chamber, form long isothermal region between the outlet, and warm field uniformity is good in this isothermal region.If sodium overflow branch road is in order to guarantee that the sodium liquid level is constant in the constant temperature chamber, to make system's safe operation under low pressure simultaneously; At pipeline and relevant devices peripheral hardware electric heater mainly is in order to start and in service heating and insulation effect.Remarkable advantage of the present invention is that its isothermal region length is 1298mm, and in this isothermal region warm field uniformity≤+ 0.1 ℃.
Now in conjunction with the accompanying drawings and embodiments the present invention is done further specific descriptions:
Fig. 1 is an electric thermo-couple test furnace structural representation provided by the present invention.
As shown in Figure 1, electric thermo-couple test furnace provided by the present invention comprises carbon steel base 1, be installed in the stainless steel casing 30 on the base 1, be positioned at the constant temperature chamber 8 of shell 30 circulation actuating medium liquid metal sodiums and the primary heater 10 that the heating liquid metal sodium makes it to reach constant working temperature, and be filled in alumina silicate fibre heat insulation layer 31 between shell 30 and constant temperature chamber 8 and the primary heater 10, the tubulose trap 16 and 15 that is used to adorn standard thermometer and tested thermopair passes shell 30 and extend in the constant temperature chamber 8, immerse in the liquid metal sodium, tested thermopair trap 15 immersion depths of tubulose argon filling formula are 1350mm, and tubulose trap 15 and 16 is mechanical seal in 8 insert divisions, constant temperature chamber.Constant temperature chamber 8 is vertical cylindric for what the GH-140 high-temperature alloy steel was made, its diameter is φ 60 * 4mm, and height is 1415mm, and 8 bottoms, constant temperature chamber have one for sodium, row's sodium mouth 27, it by pipeline with is connected with the storage sodium jar 2 that is located at its bottom by the valve 28 of sylphon seal, form for, arrange the sodium path.Storage sodium jar 2 is supported on the base 1, and is provided with air valve 3, liquid level gauge 4 and irritates sodium mouth 33, can fill in jar or arrange protective gas Ar by air valve 3, stores up sodium jar 2 so that Liquid Sodium is pressed into constant temperature chamber 8 or is entered in the constant temperature chamber 8 by storage sodium jar 2.Constant temperature chamber 8 upper end standard thermometer traps 16 and tested thermal resistance trap 15 insert divisions are provided with metal fever screen layer 18, to avoid axial heat loss in the constant temperature chamber 8 as far as possible.8 sides, constant temperature chamber are upper and lower to have sodium import 13 and exports 6, both discrepancy in elevation 1298mm, and this is an isothermal region length, and constant temperature chamber 8 is by pipeline, and electromagnetic pump 7 is connected with primary heater 10 with inside spin formula pipeline 11, forms hermetic liquid metal sodium closed circuit.Primary heater 10 is vertical cylindrical container for what the GH-140 high-temperature alloy steel was made, and sealing is inserted and immersed tubular electric heating 12.In inside spin formula pipeline 11 downstreams, sodium import 13 places are provided with the warm galvanic couple 14 of import sodium, by its heating power, make inside spin formula pipeline 11 downstreams, constant temperature chamber 8 imports, 13 place's sodium temperature constant continuously with the accurate temperature controller control of DWT-702 tubular electric heating 12.Be provided with expansion loop 9 coaxial mounted outside the constant temperature chamber 8 with it, it is embedded on its outer wall armored electric heater 17 by cylinder shell 9 and spiral and forms, be filled with alumina silicate fibre insulation course 26 between expansion loop 9 and the constant temperature chamber 8, constant temperature chamber 8 outer walls and expansion loop 9 inwalls are provided with temperature-difference thermoelectric idol 24 outward, by its heating power with the accurate temperature controller control of another DWT-702 armored electric heater 17, making the temperature difference autostable between constant temperature chamber 8 and the expansion loop 9 is 0 ℃, and promptly the radially thermal loss in constant temperature chamber 8 is almost nil.8 side sodium imports, 13 high 26mm places, constant temperature chamber have overflow vent 19, and be connected with the air cavity position of storing up sodium jar 2 by pipeline, expansion box 23 and surplus valve 25, the overflow branch road of forming liquid metal sodium, make 8 internal causes intensification expansion of constant temperature chamber or unnecessary Liquid Sodium flow back to storage sodium jar 2 through the overflow branch road from overflow vent 19, this had both guaranteed that the sodium liquid level was constant in the constant temperature chamber 8, be that isothermal region length is constant, make again to be in the loop under the low pressure and work, guarantee system safety operation.Expansion box 23 is provided with tensimeter 20, liquid level gauge 21 and vent valve 22.For preheating and insulation need, storage sodium jar 2, expansion box 23, valve 28, surplus valve 25 and all pipelines thereof are equipped with armored electric heater 32 outward.When carrying out thermocouple calibration, elder generation's preheating all devices and pipeline, closing outflow valve 25 then, open sodium valves door 28, and fill Ar gas by air valve 3 to storage sodium jar 2 and pressurize, Liquid Sodium in the jar 2 is pressed into constant temperature chamber 8, and be full of closed circuit, to overflow vent 19, until liquid level gauge 21 demonstration is arranged, stop to fill Ar gas, valve-off 28, open surplus valve 25, make unnecessary Liquid Sodium flow back to storage sodium jar 2, starting electromagnetic pump 7, Liquid Sodium is circulated in the loop, starting tubular electric heating 12 heating Liquid Sodium, control its heating power by warm galvanic couple 14 of sodium and the accurate temperature controller of DWT-702, make the Liquid Sodium that reaches proving temperature in the primary heater 10 hand over the even back that is mixed along in the sodium import 13 tangential directions rotation injection constant temperature chamber 8 in constant temperature chamber 8 through inside spin formula pipeline 11, avoid near overflow vent 19 temperature that the axial thermal conductivity because of tested thermopair trap 15 and standard thermometer trap 16 causes uneven, meanwhile start expansion loop 9, control its heating power by temperature difference heat galvanic couple 24 and the accurate temperature controller of another DWT-702, the temperature difference that makes constant temperature chamber 8 and expansion loop 9 is zero.Total system operation under the high-purity argon gas protection.For detecting import and export 13 and 6 place's sodium temperature, to determine the homogeneity of isothermal region axial temperature field in the constant temperature chamber 8, can establish a standard thermometer trap 5 in the sodium exit, in standard thermometer trap 16 and 5, measure the temperature at import and export height place in the constant temperature chamber 8 simultaneously with two first-class standard platinum resistance thermometers.Its measurement result is as shown in table 1 down to be 150 °～600 ℃ in the sodium temperature:
Axial temperature field uniformity measurement result in the table 1 constant temperature chamber
Sequence number inlet height sodium temperature (℃) the high main sodium temperature of outlet (℃) temperature difference (℃)
1 149.595 149.637 -0.042
2 199.632 199.657 -0.025
3 249.710 249.729 -0.019
4 299.751 299.760 -0.009
5 349.709 349.702 +0.007
6 399.644 399.623 +0.021
7 449.435 449.372 +0.063
8 499.711 499.649 +0.062
9 550.076 549.994 +0.082
10 599.733 599.639 +0.094
By table 1 as seen, in 150 °～600 ℃ warm areas, axial temperature field homogeneity in the isothermal region of 1298mm length in the constant temperature chamber≤+ 0.1 ℃ all is better than prior art.The present invention can be used for setting-in and is distributed on the elongated member, for example is used for the accurate calibrating of thermopair on interior temperature-measuring element of nuclear reactor heap or the out-pile thermal-hydraulic experiment electricity consumption heating analog element.
Claims (2)
1, a kind of electric thermo-couple test furnace comprises the shell 30 that is installed on the base 1, be positioned at the constant temperature chamber 8 of shell 30 circulation actuating mediums and be used for the primary heater 10 that the heating work medium makes it to reach constant working temperature, be filled with heat insulation layer 31 between shell 30 and constant temperature chamber 8 and the primary heater 10, the tubulose trap 15 and 16 that tested thermopair and standard thermometer be housed passes shell 30 and extend in the actuating medium in the constant temperature chamber 8, it is characterized in that constant temperature chamber 8 is vertical cylindric, its underpart connects to form liquid metal sodium by pipeline and valve 28 with the storage sodium jar 2 that is located at its bottom and supplies, row's path; Upper and lower sodium import and export 13 and 6 of having, 8 sides, constant temperature chamber, it connects to form hermetic liquid metal sodium closed circuit by pipeline, ebullator 7 and inside spin formula pipeline 11 with primary heater 10, and is provided with the warm galvanic couple 14 of sodium at downstream, sodium import 13 places of inside spin formula pipeline 11; 8 upper ends, constant temperature chamber are provided with thermal shield 18, and constant temperature chamber 8 is outer to be provided with expansion loop 9 coaxial mounted with it, is filled with heat insulation layer 26 between expansion loop 9 and the constant temperature chamber 8, and are provided with temperature difference heat galvanic couple 24 on the outer wall in constant temperature chamber 8 and expansion loop 9 inwalls; Constant temperature chamber 8 sidewalls are higher than sodium import 13 places and are provided with sodium overflow vent 19, and it connects to form sodium overflow branch road by pipeline, expansion box 23 and surplus valve 25 and the air cavity that stores up sodium jar 2 internal upper parts.
2, according to the said a kind of electric thermo-couple test furnace of claim 1, it is characterized in that the immersion tubular electric heating 12 that primary heater 10 is inserted in this container by vertical cylindrical container and sealing forms, expansion loop 9 is made up of the armored electric heater 17 that cylinder shell and spiral are embedded on this housing outer wall, storage sodium jar 2 is provided with air valve 3, liquid level gauge 4 and irritates sodium mouth 33, expansion box 23 is provided with tensimeter 20, liquid level gauge 21 and vent valve 22, and storage sodium jar 2, expansion box 23, valve 28, surplus valve 25 and all pipelines are equipped with electric heater 32 outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100127 CN1030348C (en) | 1993-01-07 | 1993-01-07 | Thermocouple verification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100127 CN1030348C (en) | 1993-01-07 | 1993-01-07 | Thermocouple verification furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1076025A true CN1076025A (en) | 1993-09-08 |
| CN1030348C CN1030348C (en) | 1995-11-22 |
Family
ID=4982816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93100127 Expired - Fee Related CN1030348C (en) | 1993-01-07 | 1993-01-07 | Thermocouple verification furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030348C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334323B (en) * | 2008-08-06 | 2010-04-07 | 中国原子能科学研究院 | Temperature measuring device for double-layer liquid metal sodium pipeline and installation method thereof |
| CN102322680A (en) * | 2011-07-15 | 2012-01-18 | 西安交通大学 | Liquid metal sodium experimental loop electrical heating preheater |
| CN104390729A (en) * | 2014-11-24 | 2015-03-04 | 中国航空工业集团公司北京长城计量测试技术研究所 | Special thermoelectric couple calibration furnace |
| CN107063506A (en) * | 2017-03-23 | 2017-08-18 | 东莞市宇朔泰合健康科技有限公司 | A kind of clinical thermometer calibration system and its scaling method |
| CN107607228A (en) * | 2017-08-16 | 2018-01-19 | 潍柴动力股份有限公司 | A kind of temperature sensor detector |
| CN108318638A (en) * | 2018-05-11 | 2018-07-24 | 南京简诺特智能科技有限公司 | A kind of standardization of solution device |
-
1993
- 1993-01-07 CN CN 93100127 patent/CN1030348C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334323B (en) * | 2008-08-06 | 2010-04-07 | 中国原子能科学研究院 | Temperature measuring device for double-layer liquid metal sodium pipeline and installation method thereof |
| CN102322680A (en) * | 2011-07-15 | 2012-01-18 | 西安交通大学 | Liquid metal sodium experimental loop electrical heating preheater |
| CN104390729A (en) * | 2014-11-24 | 2015-03-04 | 中国航空工业集团公司北京长城计量测试技术研究所 | Special thermoelectric couple calibration furnace |
| CN107063506A (en) * | 2017-03-23 | 2017-08-18 | 东莞市宇朔泰合健康科技有限公司 | A kind of clinical thermometer calibration system and its scaling method |
| CN107607228A (en) * | 2017-08-16 | 2018-01-19 | 潍柴动力股份有限公司 | A kind of temperature sensor detector |
| CN108318638A (en) * | 2018-05-11 | 2018-07-24 | 南京简诺特智能科技有限公司 | A kind of standardization of solution device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030348C (en) | 1995-11-22 |
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