CN110763371A - Dry body stove based on heat pipe fixed point - Google Patents
Dry body stove based on heat pipe fixed point Download PDFInfo
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- CN110763371A CN110763371A CN201911110558.4A CN201911110558A CN110763371A CN 110763371 A CN110763371 A CN 110763371A CN 201911110558 A CN201911110558 A CN 201911110558A CN 110763371 A CN110763371 A CN 110763371A
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- temperature
- heat pipe
- standard source
- dry body
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- 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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Abstract
The invention provides a dry body furnace based on a heat pipe fixing point, which comprises: a housing forming an accommodation space; the heat pipe is positioned in the accommodating space of the shell; a temperature field standard source and a verification temperature equalizing block; the bottom wall and the side wall of the heat pipe are of hollow structures, a through hole is formed in the center of the bottom wall, a temperature field standard source and a verification temperature equalizing block are arranged in the inner space of the heat pipe, the temperature field standard source is located on the inner surface of the bottom wall of the heat pipe, and the verification temperature equalizing block is located above the temperature field standard source; at least one fixed-point vessel is provided in the field-of-temperature standard source. The dry body furnace based on the heat pipe fixing points is simple in structure and uniform in temperature field distribution, can be combined with the fixing points defined by 90 international temperature standards and recommended secondary fixing points, is easy to carry out field detection, and has high temperature control precision.
Description
Technical Field
The invention relates to a dry body furnace, in particular to a dry body furnace based on a heat pipe fixing point.
Background
In the existing process of calibrating the thermometer, a constant-temperature water tank is required to be provided for providing a constant temperature field for thermometer detection, however, the constant-temperature water tank is large in volume, the time required for keeping the temperature stable is long, the constant-temperature water tank can only be used for calibrating the thermometer in a laboratory, and the constant-temperature water tank cannot be used in occasions where rapid and convenient detection needs to be carried out on the site.
At present, a dry body furnace is usually adopted for on-site verification to replace a constant-temperature water tank, the effect of providing an even temperature field is achieved, the dry body furnace is convenient to carry relative to the constant-temperature water tank, the temperature can rise quickly, stable temperature distribution is formed, and on-site verification and calibration are facilitated. However, the temperature control precision of the existing dry body furnace is relatively low, the temperature field distribution is not uniform enough, and the phenomena of drifting of a temperature measurement sensor or a standard device and the like are easy to occur in a special field environment.
Therefore, it is an urgent need to provide a dry body furnace with high temperature control accuracy.
Disclosure of Invention
The invention aims to provide a dry body furnace with self-calibration and high temperature control precision.
The invention provides a dry body furnace based on a heat pipe, which comprises: a housing forming an accommodation space; the heat pipe is positioned in the accommodating space of the shell; a temperature field standard source and a verification temperature equalizing block; the bottom wall and the side wall of the heat pipe are of hollow structures, a through hole is formed in the center of the bottom wall, a temperature field standard source and a verification temperature equalizing block are arranged in the inner space of the heat pipe, the temperature field standard source is located on the inner surface of the bottom wall of the heat pipe, and the verification temperature equalizing block is located above the temperature field standard source; the centers of the temperature field standard source and the verification temperature equalizing block are provided with through holes.
The shell comprises a side wall and a bottom plate, the shell is of a double-layer structure, the inner layer is made of heat insulation materials, and the outer layer is made of stainless steel materials.
Wherein the field temperature standard source has a plurality of mounting holes therein.
Wherein, a plurality of mounting holes are arranged in the verification temperature equalizing block.
The outer surface of the bottom wall of the heat pipe is provided with a heating assembly, and preferably, the heating assembly is a heating film.
And the height of the verification temperature equalizing block is greater than that of the temperature field standard source.
The temperature field standard source is used as a field self-calibration module, and the thermometer to be tested, the standard transfer thermometer and the temperature control thermometer are calibrated by a fixed point method.
And calibrating the on-site thermometer to be detected by the verification temperature equalizing block by using a comparison method.
The dry body furnace based on the heat pipe fixing points is simple in structure and uniform in temperature field distribution, can be combined with the fixing points defined by 90 international temperature standards and recommended secondary fixing points, is easy to carry out field detection, and has high temperature control precision.
Drawings
FIG. 1 is a schematic view of the construction of the dry body furnace of the present invention;
FIG. 2 is a bottom schematic view of example 1 of a temperature field standard source of the present invention;
FIG. 3 is a bottom schematic view of example 2 of the field standard source of temperature of the present invention;
FIG. 4 is a bottom schematic view of example 3 of the temperature field standard source of the present invention.
Detailed Description
To facilitate an understanding of the present invention, embodiments of the present invention will be described below with reference to the accompanying drawings, and it will be understood by those skilled in the art that the following descriptions are provided only for the purpose of illustrating the present invention and are not intended to specifically limit the scope thereof.
The dry body furnace comprises a shell, the shell forms an accommodating space, the shell comprises a side wall and a bottom plate, the shell is of a double-layer structure, the inner layer is made of heat insulation materials, and the outer layer is made of stainless steel materials, so that the shell has the functions of heat preservation, damage prevention caused by collision and the like.
Fig. 1 is a schematic view of the dry body furnace structure in the housing. A heat pipe 1 is arranged in the shell, the heat pipe 1 is located in the accommodating space of the shell 1, and the shell supports the heat pipe 1. The heat pipe 1 is provided with a bottom wall and a side wall extending upwards from the bottom wall, the bottom wall and the side wall of the heat pipe 1 are of a hollow structure, the heat pipe 1 is in a closed form, the inside of the closed pipe is firstly vacuumized, a proper amount of working medium is filled in the closed pipe, the lower end of the heat pipe is heated, the working medium absorbs heat and is vaporized into steam, the steam rises to the upper end of the heat pipe under a small pressure difference, the heat is released to the outside, and the steam is condensed into liquid. The condensate returns to the heated section along the inner wall of the heat pipe under the action of gravity, is heated and vaporized again, and is circulated in such a way, so that heat is continuously transmitted from one end to the other end. Because of phase change heat transfer, the heat resistance in the heat pipe is small. The working medium is arranged in the hollow structure, a through hole is formed in the center of the bottom wall and penetrates through the bottom wall, the size of the through hole is reduced as much as possible, so that the influence on the temperature distribution around the through hole is avoided, and the temperature uniformity near the bottom wall is ensured. The outer surface of the bottom wall of the heat pipe 1 can be preferably provided with a heating assembly, the heating assembly is preferably a heating film, the bottom wall of the heat pipe has uniform temperature field distribution through heating of the heating film, and the temperature uniformity and the temperature constancy of the bottom wall position of the heat pipe are ensured. The bottom wall of the heat pipe is heated, the high-thermal-conductivity material absorbs heat and vaporizes into steam, the steam rises to the upper end of the heat pipe under a tiny pressure difference, and the steam is condensed into liquid after releasing heat to the outside. The condensate returns to the heated section along the inner wall of the heat pipe under the action of gravity, and is heated and vaporized again, and the circulation is repeated in such a way, so that the heat is continuously transmitted from one end to the other end, and the heat pipe has a uniform temperature field.
A temperature field standard source 2 and a verification temperature equalizing block 3 are arranged in the inner space of the heat pipe 1, the temperature field standard source 2 is located on the inner surface of the bottom wall of the heat pipe 1, the bottom of the temperature field standard source 2 is in contact with the inner surface of the bottom wall of the heat pipe 1, and the verification temperature equalizing block 3 is located above the temperature field standard source 2. The height of the verification temperature equalizing block 3 is larger than that of the temperature field standard source 2. The heat pipe 1 provides a uniform temperature field in its inner space.
The center of the temperature field standard source 2 is provided with a first through hole, three mounting holes are arranged around the first through hole, and the three mounting holes are uniformly distributed around the first through hole, as shown in fig. 2, which is a schematic bottom view of the temperature field standard source in embodiment 1, and the three mounting holes are sequentially rotated by 120 degrees relative to the first through hole and uniformly distributed around the first through hole. And fixed points are arranged in the mounting holes and are used for providing temperature calibration, and the fixed points of the three mounting holes can be selected from the fixed points defined by 90 international temperature standards and recommended secondary fixed point materials.
As shown in fig. 3, which is a schematic bottom view of an embodiment 2 of the temperature field standard source, three annular grooves are distributed at equal intervals around the temperature field standard source 2, fixing point devices for temperature calibration are arranged in the annular grooves, and the same fixing point or different fixing points can be arranged in each of the three annular grooves to obtain a plurality of temperature standards.
As a further preference, as shown in fig. 4, which is a schematic bottom view of example 1 of the temperature field standard source, six installation holes may be distributed at equal intervals around the temperature field standard source 2, fixing point devices for temperature calibration are arranged in the installation holes, the same fixing point may be installed in each of the six installation holes, or different fixing points may be installed to obtain a plurality of establishable temperatures.
The center of the verification temperature equalizing block 3 is provided with a second through hole, a plurality of mounting holes are formed in the periphery of the second through hole, a thermometer to be tested can be placed in the mounting holes, a standard platinum resistance thermometer 4 is inserted into the second through hole of the verification temperature equalizing block 3, and the standard platinum resistance thermometer measures the thermometer of the verification temperature equalizing block 3. And the verification temperature equalizing block calibrates the on-site thermometer to be detected by using a comparison method. Further preferably, the standard platinum resistance thermometer can be inserted into the first through hole of the temperature field standard source 2, and the platinum resistance thermometer is calibrated through the fixed point in the verification temperature equalizing block 3, so as to calibrate the thermometer to be measured in the mounting hole of the verification temperature equalizing block 3.
And a temperature measuring element extends into a first through hole of the temperature field standard source 2 from a through hole in the center of the bottom wall of the heat pipe 1, the temperature measuring element is connected to a temperature measuring instrument 5, the fixed point calibrates the standard platinum resistance thermometer and a temperature control detection element at the same time, and the temperature measuring element is preferably a temperature control thermometer. As a further option, when performing field detection, the temperature of the temperature field standard source can be measured only by the temperature control detection element, and calibration of the thermometer to be measured can be realized by detecting a fixed point in real time. The fixed point can be selected from 90 international temperature scale defined fixed points and recommended secondary fixed point materials. The temperature field standard source is used as a field self-calibration module, and the thermometer to be tested, the standard transfer thermometer and the temperature control thermometer are calibrated by a fixed point method.
The dry body furnace based on the heat pipe fixing points is simple in structure and uniform in temperature field distribution, can be combined with the fixing points defined by 90 international temperature standards and recommended secondary fixing points, is easy to carry out field detection, and has high temperature control precision. It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (8)
1. A dry body oven based on heat pipe fixing points, comprising:
a housing forming an accommodation space;
the heat pipe is positioned in the accommodating space of the shell;
a temperature field standard source and a verification temperature equalizing block;
the method is characterized in that: the bottom wall and the side wall of the heat pipe are of hollow structures, a through hole is formed in the center of the bottom wall, a temperature field standard source and a verification temperature equalizing block are arranged in the inner space of the heat pipe, the temperature field standard source is located on the inner surface of the bottom wall of the heat pipe, and the verification temperature equalizing block is located above the temperature field standard source; the centers of the temperature field standard source and the verification temperature equalizing block are provided with through holes.
2. The dry body oven of claim 1, wherein: the shell comprises a side wall and a bottom plate, the shell is of a double-layer structure, the inner layer is made of heat insulation materials, and the outer layer is made of stainless steel materials.
3. The dry body oven of claim 1, wherein: there are a plurality of mounting holes in the field standard source of temperature.
4. The dry body oven of claim 1, wherein: the verification temperature equalizing block is provided with a plurality of mounting holes.
5. The dry body oven of claim 1, wherein: and a heating assembly is arranged on the outer surface of the bottom wall of the side wall of the heat pipe.
6. The dry body oven of claim 1, wherein: the height of the verification temperature equalizing block is larger than that of the temperature field standard source.
7. The dry body oven of claim 1, wherein: the temperature field standard source is used as a field self-calibration module, and the thermometer to be tested, the standard transfer thermometer and the temperature control thermometer are calibrated by a fixed point method.
8. The dry body oven of claim 1, wherein: and the verification temperature equalizing block calibrates the on-site thermometer to be detected by using a comparison method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110558.4A CN110763371B (en) | 2019-11-14 | 2019-11-14 | Dry body stove based on heat pipe fixed point |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911110558.4A CN110763371B (en) | 2019-11-14 | 2019-11-14 | Dry body stove based on heat pipe fixed point |
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| CN110763371A true CN110763371A (en) | 2020-02-07 |
| CN110763371B CN110763371B (en) | 2021-06-08 |
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| CN201911110558.4A Active CN110763371B (en) | 2019-11-14 | 2019-11-14 | Dry body stove based on heat pipe fixed point |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465787A (en) * | 2021-07-20 | 2021-10-01 | 中国计量科学研究院 | Horizontal potassium heat pipe comparison temperature source |
| CN113551795A (en) * | 2021-07-20 | 2021-10-26 | 中国计量科学研究院 | Temperature filtering device for standard resistor thermostatic bath |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465787A (en) * | 2021-07-20 | 2021-10-01 | 中国计量科学研究院 | Horizontal potassium heat pipe comparison temperature source |
| CN113551795A (en) * | 2021-07-20 | 2021-10-26 | 中国计量科学研究院 | Temperature filtering device for standard resistor thermostatic bath |
| CN113551795B (en) * | 2021-07-20 | 2022-08-09 | 中国计量科学研究院 | Temperature filtering device for standard resistor thermostatic bath |
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| CN110763371B (en) | 2021-06-08 |
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