CN117346921B - A multi-fixed point continuous reproduction device and method - Google Patents
A multi-fixed point continuous reproduction device and method Download PDFInfo
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- CN117346921B CN117346921B CN202311387134.9A CN202311387134A CN117346921B CN 117346921 B CN117346921 B CN 117346921B CN 202311387134 A CN202311387134 A CN 202311387134A CN 117346921 B CN117346921 B CN 117346921B
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- crucible
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- temperature
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 230000007423 decrease Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 5
- 230000008023 solidification Effects 0.000 description 8
- 238000007711 solidification Methods 0.000 description 8
- 230000008014 freezing Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/002—Calibrated temperature sources, temperature standards therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
本发明公开了一种多固定点连续复现装置及方法，所述装置包括加热炉、多固定点坩埚、定位块，多固定点坩埚包括基座坩埚和一个或多个扩展坩埚，所述一个或多个扩展坩埚由下至上串联设置在基座坩埚的上层，基座坩埚和扩展坩埚中各灌注有不同种类的金属温度固定点，并且所灌注温度固定点的温度由下至上依次降低；加热炉采用多段独立加热控温方式，加热炉的温区覆盖多固定点坩埚的长度范围；基座坩埚的测量腔与扩展坩埚的测量腔连通，形成多固定点坩埚的测量腔，定位块用于放置在多固定点坩埚的测量腔内，能够调整多固定点坩埚的测量腔深度。本发明能够实现多个金属温度固定点的连续复现，提升使用温度固定点校准温度传感器的工作效率。
The present invention discloses a multi-fixed point continuous reproduction device and method, the device includes a heating furnace, a multi-fixed point crucible, and a positioning block, the multi-fixed point crucible includes a base crucible and one or more extended crucibles, the one or more extended crucibles are arranged in series on the upper layer of the base crucible from bottom to top, the base crucible and the extended crucible are each filled with different types of metal temperature fixed points, and the temperature of the poured temperature fixed points decreases from bottom to top; the heating furnace adopts a multi-stage independent heating and temperature control method, and the temperature zone of the heating furnace covers the length range of the multi-fixed point crucible; the measuring cavity of the base crucible is connected with the measuring cavity of the extended crucible to form the measuring cavity of the multi-fixed point crucible, and the positioning block is used to be placed in the measuring cavity of the multi-fixed point crucible, and the depth of the measuring cavity of the multi-fixed point crucible can be adjusted. The present invention can realize the continuous reproduction of multiple metal temperature fixed points and improve the working efficiency of calibrating temperature sensors using temperature fixed points.
Description
Technical Field
The invention belongs to the field of thermal measurement, and relates to a multi-fixed-point continuous reproduction device and method.
Background
The pure metal temperature fixed point is a temperature reference fixed point specified in an ITS-90 temperature scale, and is used for calibrating or calibrating a high-precision temperature sensor, such as a standard platinum resistor/thermocouple, a precision platinum resistor and the like due to the advantages of good repeatability, good long-term stability and the like. The temperature fixed point container is generally a crucible made of high-purity graphite material, and high-purity metal is sealed in the crucible. When the metal temperature is reproduced, a calibrated temperature sensor is inserted into a measuring cavity of a crucible, the temperature sensor is heated to be slightly higher than the melting point temperature of the metal by using a reproduction furnace to be melted, the temperature is reduced to be slightly lower than the solidification temperature of the metal after the temperature sensor is completely melted to be solidified, and the temperature in the solidification process is kept unchanged, so that the temperature is called a solidification temperature plateau, and the temperature plateau is the solidification temperature point of the metal. In addition to gallium points, other metallic fixation points generally measure the solidification plateau. Currently, the metallic fixation points (also called solidification points) specified by ITS-90 temperature scale mainly include: indium (In) freezing point (156.5985 ℃), tin (Sn) freezing point (231.928 ℃), zinc (Zn) freezing point (419.527 ℃), aluminum (Al) freezing point (660.323 ℃), silver (Ag) freezing point (961.78 ℃), gold (Au) freezing point (1064.18 ℃), copper (Cu) freezing point (1084.62 ℃), and the like.
According to the traditional metal fixed point reproduction device and method, only one crucible is placed in each heating furnace, and only one metal can be poured into the crucible, so that only one temperature point can be reproduced in each test, and the working efficiency is low. In order to improve the working efficiency, a plurality of reproduction furnaces are generally used at the same time, and each furnace is provided with a metal fixing point in a reproduction mode, so that the cost is high, and a plurality of devices are inconvenient to carry in the scene of on-site metering guarantee and the like.
Disclosure of Invention
The invention aims to provide a multi-fixed-point continuous reproduction device and a multi-fixed-point continuous reproduction method, which can realize continuous reproduction of a plurality of metal fixed points and improve the working efficiency of calibrating a temperature sensor by using the temperature fixed points.
One aspect of the invention provides a multi-fixed point continuous reproduction device, which comprises a heating furnace, a multi-fixed point crucible and a positioning block,
The multi-fixed-point crucible comprises a base crucible and one or more expansion crucibles, wherein the one or more expansion crucibles are arranged on the upper layer of the base crucible in series from bottom to top, different kinds of metal temperature fixed points are respectively poured into the base crucible and the one or more expansion crucibles, and the temperature of the poured temperature fixed points is reduced from bottom to top in sequence;
The heating furnace adopts a multi-section independent heating temperature control mode, a longer uniform temperature zone can be provided, and the uniform temperature zone of the heating furnace covers the length range of the crucible with multiple fixed points;
The measuring cavity of the base crucible is communicated with the measuring cavities of the one or more extension crucibles to form the measuring cavity of the multi-fixed-point crucible, and the positioning block is used for being placed in the measuring cavity of the multi-fixed-point crucible and capable of adjusting the depth of the measuring cavity of the multi-fixed-point crucible.
Preferably, the number of the extension crucibles is adjusted according to the length of the heating furnace.
Preferably, the one or more extension crucibles are arranged in series in an upper layer of the base crucible by a threaded connection.
Preferably, an internal thread is arranged at the top of the measuring cavity of the base crucible and is used for being connected with the expansion crucible.
Preferably, the top and the bottom of the measuring cavity of the expansion crucible are respectively provided with an internal thread and an external thread, the external thread at the bottom is used for being connected with the expansion crucible or the base crucible at the lower layer, and the internal thread at the top is used for being connected with the expansion crucible at the upper layer.
Preferably, the multi-fixed point crucible further comprises a crucible cover, and the uppermost expansion crucible is connected with the crucible cover through internal threads at the top.
Preferably, the inner diameter of the measuring cavity of the extension crucible and the outer diameter of the extension crucible as a whole are the same as the base crucible.
Preferably, the material of the positioning block is the same as that of the base crucible and the expansion crucible, the outer diameter of the positioning block is the same as that of the inner diameters of the measuring cavities of the base crucible and the expansion crucible, and the length of the positioning block is the same as that of the measuring cavities of the base crucible and the expansion crucible.
Another aspect of the present invention provides a multi-fixed point continuous reproduction method, which uses the multi-fixed point continuous reproduction device to realize continuous reproduction of a plurality of fixed points, including:
Step S1: the base crucible and one or more expansion crucibles are connected in series from bottom to top in sequence according to the temperature of the metal fixed point from high to low to form a multi-fixed point crucible;
Step S2: placing the crucible with multiple fixed points in a heating furnace;
Step S3: inserting a temperature sensor into the bottommost part of a measuring cavity of the crucible with multiple fixed points, and repeating the first fixed point with the highest temperature;
Step S4: taking out the temperature sensor, placing a positioning block in a measuring cavity of the crucible with multiple fixing points, inserting the temperature sensor into the measuring cavity of the crucible with multiple fixing points again, adjusting the temperature of the heating furnace, and repeating the second fixing point;
step S5: and repeating the step S4 to realize continuous reproduction of a plurality of metal fixed points with the temperature from high to low.
According to the multi-fixed-point continuous reproduction device and the multi-fixed-point continuous reproduction method, continuous reproduction of a plurality of metal fixed points can be realized in a test process, and the working efficiency of calibrating a temperature sensor by using the temperature fixed points is improved.
Drawings
For a clearer description of the technical solutions of the present invention, the following description will be given with reference to the attached drawings used in the description of the embodiments of the present invention, it being obvious that the attached drawings in the following description are only some embodiments of the present invention, and that other attached drawings can be obtained by those skilled in the art without the need of inventive effort:
FIG. 1 is a schematic diagram of an application of a multi-anchor point continuous reproduction apparatus according to an embodiment of the present invention in reproducing an underlying anchor point;
FIG. 2 is a schematic diagram of an application of a multi-fixed point continuous reproduction device according to an embodiment of the present invention when reproducing an upper fixed point;
FIG. 3 is a schematic view showing the structure of a multi-fixing-point crucible according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a susceptor crucible according to an embodiment of the present invention;
FIG. 5 is a schematic view showing the structure of an extension crucible according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a multi-fixed-point continuous reproduction device which is suitable for each metal solidifying point specified in an ITS-90 temperature scale and realizes continuous reproduction from a high-temperature fixed point to a low-temperature fixed point. As shown in fig. 1 to 5, the multi-fixed point continuous reproduction device of the embodiment of the present invention includes a heating furnace 1, a multi-fixed point crucible 2, and a positioning block 3 for calibrating or calibrating a temperature sensor 6.
The multi-fixed point crucible 2 includes a base crucible 4 and one or more extension crucibles 5. In fig. 1-3 only one extension crucible 5 is shown. The one or more extension crucibles 5 are arranged in series from bottom to top above the base crucible 4. That is, the multi-fixed point crucible 2 is composed of a plurality of individual crucibles, and the crucible is referred to as a susceptor crucible at the lowest layer, and the others are all extension crucibles. The number of individual crucibles connected in series is adjusted according to the length of the heating furnace 1.
Each of the base crucible 4 and the extension crucible 5 is filled with pure metal temperature fixing points of different temperatures, and the temperature of the filled temperature fixing points is reduced sequentially from bottom to top, the fixing point with the highest temperature is filled in the base crucible 4, the metal fixing point with the lower temperature is filled in the extension crucible 5, and the lower the temperature of the metal fixing point of the extension crucible 5 positioned above is, so that the base crucible 4 and the one or more extension crucibles 5 are arranged in series from bottom to top sequentially from top to bottom according to the temperature of the metal fixing points.
The heating furnace 1 is used for heating the crucible 2 with multiple fixed points. The heating furnace 1 adopts a multi-section independent heating temperature control mode, and can realize a longer uniform temperature zone so as to cover the length range of the crucible 2 with multiple fixed points.
The measuring cavity of the base crucible 4 is communicated with the measuring cavity of the one or more extension crucibles 5 to form the measuring cavity of the multi-fixed-point crucible 2, the positioning block 3 is used for being placed in the measuring cavity of the multi-fixed-point crucible 2, and the depth of the measuring cavity of the multi-fixed-point crucible 2 is adjusted, so that each base crucible 4 and each extension crucible 5 can be subjected to temperature point reproduction in sequence independently.
The measuring cavity of the base crucible 4 and the crucible body are of an integrated structure, and the top of the measuring cavity is provided with an internal thread for being connected with the extension crucible 5.
The measuring cavity of the expansion crucible 5 and the crucible body are of an integrated structure, the top and the bottom of the measuring cavity are respectively provided with an internal thread and an external thread, the external thread at the bottom is used for being connected with the expansion crucible 5 or the base crucible 4 at the lower layer, and the internal thread at the top is used for being connected with the expansion crucible 5 at the upper layer. The inner diameter of the measuring chamber of the extension crucible 5 and the outer diameter of the whole extension crucible 5 are the same as those of the base crucible 4.
The multi-fixing point crucible 3 may further comprise a crucible cover 7, and the uppermost extension crucible 5 is connected to the crucible cover 7 by an internal thread at the top.
The material of the positioning block 3 is selected from the same materials as the base crucible 4 and the extension crucible 5, the outer diameter is the same as the inner diameters of the measuring cavities of the base crucible 4 and the extension crucible 5, and the length is the same as the lengths of the measuring cavities of the base crucible 4 and the extension crucible 5.
The embodiment of the invention also provides a multi-fixed-point continuous reproduction method, which realizes continuous reproduction of a plurality of fixed points by using the multi-fixed-point continuous reproduction device of the embodiment, and comprises the following steps S1-S5.
In step S1, the extension crucible 5 is attached to the base crucible 4 to form the multi-fixing point crucible 2.
In step S2, the multi-fixed point crucible 2 is placed in the heating furnace 1 as shown in fig. 1.
In step S3, the temperature sensor 6 is inserted into the bottom of the measuring chamber of the multi-fixed point crucible 2, and the metal fixed point, i.e., the first temperature fixed point with the highest temperature, in the base crucible 4 is reproduced.
In step S4, the temperature sensor 6 is taken out, the positioning block 3 is placed in the measurement cavity of the multi-fixing-point crucible 2 as shown in fig. 2, the temperature sensor 6 is inserted into the measurement cavity again, and the second fixing point of temperature is reproduced after the temperature of the heating furnace 1 is adjusted.
In step S5, step S4 is repeated until a continuous reproduction of all the plurality of metal fixing points with the temperature from high to low is achieved.
Taking two metal fixing points of continuously reproducing tin (Sn) fixing point (231.928 ℃ C.) and zinc (Zn) fixing point (419.527 ℃ C.), the interior of the base crucible 4 is filled with Zn fixing point (419.527 ℃ C.), and the interior of the extension crucible 5 is filled with Sn fixing point (231.928 ℃ C.). The extension crucible 5 is first attached to the base crucible 4 to form the multi-fixed-point crucible 2 as shown in fig. 3, and then the multi-fixed-point crucible 2 is placed in the replication heating furnace 1, and the calibrated temperature sensor 6 is inserted into the bottom of the multi-fixed-point crucible 2 as shown in fig. 1.
And starting the heating furnace 1 to heat to a temperature slightly higher than the melting temperature of Zn, namely 421 ℃, cooling the heating furnace 1 to a temperature slightly lower than the solidifying point temperature of Zn, namely 417 ℃ after the Sn and Zn metals are completely melted, solidifying the Zn metals, and testing after solidifying temperature plateaus appear, so as to obtain the Zn fixed point calibration data of the calibrated temperature sensor 6. The temperature sensor 6 is then removed, the positioning block 3 is placed in the measurement cavity of the multi-fixed point crucible 2, and the temperature sensor 6 is reinserted, as shown in fig. 2. And cooling the temperature of the heating furnace 1 to be slightly lower than the solidification temperature of the Sn point, namely 230 ℃, starting to solidify Sn metal, and testing after the solidification temperature plateau appears, so as to obtain Sn fixed point calibration data of the temperature sensor 6 to be measured, thus completing the continuous reproduction of the temperatures of the two metal fixed points of Zn and Sn.
The multi-fixed-point continuous reproduction device and the method of the embodiment of the invention have the following advantages:
1. the invention can realize continuous reproduction of a plurality of temperature fixing points and improve the working efficiency;
2. the invention can flexibly adjust the number of the expansion crucibles according to the length of the reappearance heating furnace, and has higher adaptability to heating equipment.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (8)
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| CN202311387134.9A CN117346921B (en) | 2023-10-24 | 2023-10-24 | A multi-fixed point continuous reproduction device and method |
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| CN202311387134.9A CN117346921B (en) | 2023-10-24 | 2023-10-24 | A multi-fixed point continuous reproduction device and method |
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| CN117346921A CN117346921A (en) | 2024-01-05 |
| CN117346921B true CN117346921B (en) | 2024-11-22 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398405B1 (en) * | 1998-12-11 | 2002-06-04 | Agency Of Industrial Science And Technology | Fixed-point crucible, fixed-point temperature realizing apparatus using the crucible and temperature calibration method |
| CN203587247U (en) * | 2013-10-14 | 2014-05-07 | 中国计量科学研究院 | Sealed container |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3287031B2 (en) * | 1991-10-16 | 2002-05-27 | 神鋼電機株式会社 | Cold wall induction melting crucible furnace |
| JP2006349475A (en) * | 2005-06-15 | 2006-12-28 | Chino Corp | Fixed point crucible for thermometer calibration |
| JP4565159B2 (en) * | 2005-10-14 | 2010-10-20 | 独立行政法人産業技術総合研究所 | Temperature fixed point cell, temperature fixed point device, and thermometer calibration method |
| JP6086218B2 (en) * | 2013-02-18 | 2017-03-01 | 国立研究開発法人産業技術総合研究所 | Fixed point blackbody furnace |
| CN112665760A (en) * | 2020-11-25 | 2021-04-16 | 中国航空工业集团公司北京长城计量测试技术研究所 | Fixed point container with through temperature measuring hole |
| CN114184292A (en) * | 2021-11-25 | 2022-03-15 | 长沙新立硅材料科技有限公司 | Device for continuously measuring wall temperature of graphite crucible and placing method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398405B1 (en) * | 1998-12-11 | 2002-06-04 | Agency Of Industrial Science And Technology | Fixed-point crucible, fixed-point temperature realizing apparatus using the crucible and temperature calibration method |
| CN203587247U (en) * | 2013-10-14 | 2014-05-07 | 中国计量科学研究院 | Sealed container |
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