CN219178733U - Graphite crucible internal temperature measuring device suitable for high temperature induction furnace - Google Patents
Graphite crucible internal temperature measuring device suitable for high temperature induction furnace Download PDFInfo
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- CN219178733U CN219178733U CN202223214062.1U CN202223214062U CN219178733U CN 219178733 U CN219178733 U CN 219178733U CN 202223214062 U CN202223214062 U CN 202223214062U CN 219178733 U CN219178733 U CN 219178733U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model discloses a graphite crucible internal temperature measuring device suitable for a high-temperature induction furnace, which is arranged above the induction furnace; comprising the following steps: the graphite crucible is arranged in the heat-preservation filler layer, the graphite temperature measuring tube sequentially passes through the heat-preservation filler layer and the temperature measuring holes of the graphite crucible cover from above the induction furnace, and the lower end of the graphite temperature measuring tube is in contact with the inside of the material layer in the graphite crucible; the measuring device provided by the utility model can not only dissipate heat conducted by the upper part of the induction furnace to enable the infrared temperature measuring probe to work in an environment smaller than the upper limit of temperature, but also play a role in supporting the infrared temperature measuring probe, so that the distance between the infrared probe and the crucible is shortened as much as possible, and the temperature measuring error is reduced.
Description
Technical Field
The utility model discloses the technical field of boron nitride crystallization equipment, in particular to a graphite crucible internal temperature measuring device suitable for a high-temperature induction furnace.
Background
Boron nitride is formed by combining boron element and nitrogen element, and can be generated at 660 ℃ or above. However, boron nitride produced at 660-1450 ℃ has poor crystallinity, and high crystallinity boron nitride has performance advantages such as self-lubricity and high thermal conductivity, which are difficult to be expressed. Therefore, boron nitride formed at a lower temperature needs to be crystallized at a high temperature. In addition, as the crystallization temperature of boron nitride increases, the integrity, grain size and growth rate of boron nitride crystals are increased, so when the preparation of large-grain size high-crystallinity boron nitride crystals is required, the crystallization operation of boron nitride is usually carried out at 1800 ℃ or higher, and the temperature is controlled by an infrared temperature measuring device.
Since a large amount of gas is generated during the preparation of boron nitride, and boron nitride is not conductive, it cannot be directly heated by electric current. The equipment used in industry is an induction furnace, graphite is used as a crucible, the crucible is used as an induction heating element, and the crucible is integrally embedded in a Wen Tanfen layer. With this structure, it is difficult to measure the crucible temperature from the side. Therefore, the temperature measuring device needs to be arranged above the induction furnace, but the temperature of the upper surface of the induction furnace is about three hundred ℃, and the probe of the infrared temperature measuring device can only tolerate 180 ℃.
Disclosure of Invention
In view of the above, the utility model discloses a temperature measuring probe which is applicable to a graphite crucible internal temperature measuring device of a high-temperature induction furnace and can prevent high temperature from damaging an infrared temperature measuring device.
The technical scheme provided by the utility model is that the device for measuring the temperature inside the graphite crucible is suitable for a high-temperature induction furnace, and the device for measuring the temperature inside the graphite crucible is arranged above the induction furnace; comprising the following steps: the graphite temperature measuring tube sequentially passes through the heat insulation filler layer and the temperature measuring hole of the graphite crucible cover from above the induction furnace, the lower end of the graphite temperature measuring tube is in contact with the inside of the material layer in the graphite crucible, and the head end of the graphite temperature measuring tube is connected with the lower end of the extension tube; the upper end of the extension tube is connected with the lower end of the bakelite heat insulation block, the upper end of the bakelite heat insulation block is connected with the armored infrared probe,
further, the bottom end of the graphite temperature measuring tube is a blind end.
Further, a sleeve joint is arranged at the upper end of the graphite temperature measuring tube, and the upper end of the graphite temperature measuring tube is sleeved with the lower end of the extension tube through the sleeve joint.
Further, the upper end of the extension tube is provided with an internal thread structure, the bakelite heat insulation block is in a cylindrical tube shape, the lower end of the extension tube is provided with an external thread structure, and the upper end of the extension tube is connected with the lower end of the bakelite heat insulation block through the internal thread structure and the external thread structure.
Further, the upper end of the bakelite heat insulation block is connected with an armored infrared probe through a sleeve joint.
Further, a radiating window is arranged on the extension tube.
The graphite crucible internal temperature measuring device suitable for the high-temperature induction furnace provided by the utility model can not only dissipate heat conducted by the upper part of the induction furnace and enable the infrared temperature measuring probe to work in an environment smaller than the upper temperature limit, but also play a role in supporting the infrared temperature measuring probe, so that the distance between the infrared probe and the crucible is shortened as much as possible, and the temperature measuring error is reduced.
The device accurately measures the temperature of materials in the crucible in a top temperature measurement mode from the graphite crucible embedded by the heat-insulating filler layer, and particularly, the temperature of the working area of the infrared probe can be reduced to about 80-120 ℃.
In addition, if the temperature control cooling is not needed, the infrared probe can be directly moved out for heating of other induction furnace bodies, so that the equipment cost is saved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the utility model as claimed.
Drawings
Fig. 1 is a schematic diagram of an exploded structure of a graphite crucible internal temperature measuring device suitable for a high temperature induction furnace according to the present utility model.
Detailed Description
Exemplary embodiments will be described in detail herein. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of systems consistent with aspects of the utility model as detailed in the accompanying claims.
The embodiment provides a graphite crucible internal temperature measuring device suitable for a high-temperature induction furnace, and the measuring device is arranged above the induction furnace as shown in the figure; comprising the following steps: the graphite temperature measuring tube 5, the extension tube 3, the bakelite heat insulation block 2, the armored infrared probe 1 and the heat preservation packing layer 6, the graphite crucible is arranged in the heat preservation packing layer 6, and the graphite temperature measuring tube 5 sequentially passes through the heat preservation packing layer 6 and the temperature measuring hole of the graphite crucible cover from above the induction furnace;
the graphite temperature measuring tube is positioned in the graphite crucible temperature measuring hole;
the lower end of the graphite temperature measuring tube 5 is in contact with the interior of the material layer in the graphite crucible, and the head end of the graphite temperature measuring tube 5 is connected with the lower end of the extension tube 3; the upper end of the extension pipe 3 is connected with the lower end of the bakelite heat insulation block 2, and the upper end of the bakelite heat insulation block 2 is connected with the armored infrared probe 1; the extension pipe 3 can be made of stainless steel, and is used for heat dissipation and support in the whole device;
the bottom end of the graphite temperature measuring tube 5 is a blind end; the graphite temperature measuring tube with the bottom sealed can be directly contacted with materials, so that the temperature measurement is accurate;
the upper end of the graphite temperature measuring tube 5 is provided with a sleeve joint, and the upper end of the graphite temperature measuring tube 5 is sleeved with the lower end of the extension tube 3 through the sleeve joint.
The extension pipe 3 upper end is equipped with internal thread structure, bakelite thermal insulation block 2 is cylindrical tubulose, and the lower extreme is equipped with external thread structure, extension pipe 3 upper end and bakelite thermal insulation block 2 lower extreme are passed through internal thread structure, external thread structure are connected. In the whole device, the bakelite heat insulation block 2 is used for insulating heat conduction;
the graphite temperature measuring tube 5 penetrates into the heat preservation packing layer 6 from the upper part of the induction furnace and is connected with a temperature measuring hole of the graphite crucible. The lower end of the graphite temperature measuring tube is a blind end, and penetrates into the material layer to be in contact with the material layer for heat transfer; the heat-insulating filler layer 6 can adopt heat-insulating carbon powder;
the upper end of the bakelite heat insulation block 2 is connected with an armored infrared probe 1 through a sleeve joint. The bakelite heat insulation block can effectively insulate heat transferred from the stainless steel temperature measuring tube.
The extension tube 3 is provided with a heat radiation window for the circulation of external air for heat radiation.
The stainless steel extension tube can support the infrared temperature probe and enable the infrared probe to be far away from a high-temperature area above the crucible; the heat radiating window is arranged on the extension tube, so that the heat radiating efficiency can be improved, and the heat transfer from the graphite temperature measuring tube to the infrared temperature measuring probe is reduced to a certain extent;
the armored infrared probe 1 can adopt one of the infrared thermometer devices in the prior art, and is connected into the pipe joint of the bakelite heat insulation block sleeve 2 during use.
The bottom surface of graphite temperature measurement pipe 5 can be heated to the temperature of crucible, and graphite temperature measurement pipe 5 plays the effect of "being launched infrared light after being heated", and the infrared that the temperature measurement pipe bottom surface sent is surveyed by armoured infrared probe 1, and the infrared probe among the prior art only need detect the light that the heat source sent and can ascertain the temperature.
When the graphite crucible cover is used, the graphite temperature measuring tube 5 is firmly inserted into a reserved temperature measuring hole in the graphite crucible cover 7, and the bottom end of the graphite temperature measuring tube contacts with the material 8 to ensure the most accurate temperature measurement. Covering the graphite crucible and part of graphite temperature measuring tubes with heat-insulating carbon powder, and then paving a heat-insulating filler layer 6; and a stainless steel extension tube 3 is inserted into the upper end of the graphite temperature measuring tube 5, then the bakelite heat insulation block 2 is hung, and finally an armored infrared probe is inserted, so that the assembly of the temperature measuring system of the induction furnace is completed.
After the use is completed, after the furnace is cooled, the armored infrared probe is pulled out, the bakelite heat insulation block is screwed off, the stainless steel extension tube is pulled out, finally, the heat-insulating carbon powder is cleaned according to the requirement, the graphite temperature measuring tube is pulled out, the materials attached to the tail end are cleaned, and the heat transfer efficiency of the next use is ensured. If the cooling speed is not required to be controlled, the armored infrared probe can be directly pulled out for other induction furnaces.
Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.
Claims (6)
1. The graphite crucible internal temperature measuring device suitable for the high-temperature induction furnace is characterized in that the measuring device is arranged above the induction furnace; comprising the following steps: the induction furnace comprises a graphite temperature measuring tube (5), an extension tube (3), an bakelite heat insulation block (2), an armored infrared probe (1) and a heat preservation filler layer (6), wherein a graphite crucible is arranged in the heat preservation filler layer (6), the graphite temperature measuring tube (5) sequentially penetrates through the heat preservation filler layer (6) and a temperature measuring hole of a graphite crucible cover from above the induction furnace, the lower end of the graphite temperature measuring tube (5) is in contact with the inside of a material layer in the graphite crucible, and the head end of the graphite temperature measuring tube (5) is connected with the lower end of the extension tube (3); the upper end of the extension pipe (3) is connected with the lower end of the bakelite heat insulation block (2), and the upper end of the bakelite heat insulation block (2) is connected with the armored infrared probe (1).
2. The device for measuring the internal temperature of the graphite crucible, which is suitable for the high-temperature induction furnace, according to claim 1, wherein the bottom end of the graphite temperature measuring tube (5) is a blind end.
3. The device for measuring the internal temperature of the graphite crucible, which is suitable for the high-temperature induction furnace, according to claim 1, is characterized in that a sleeve joint is arranged at the upper end of the graphite temperature measuring tube (5), and the upper end of the graphite temperature measuring tube (5) is sleeved with the lower end of the extension tube (3) through the sleeve joint.
4. The graphite crucible internal temperature measuring device suitable for the high-temperature induction furnace according to claim 1, wherein an internal thread structure is arranged at the upper end of the extension tube (3), the bakelite heat insulation block (2) is in a cylindrical tube shape, an external thread structure is arranged at the lower end of the extension tube (3), and the upper end of the extension tube (3) is connected with the lower end of the bakelite heat insulation block (2) through the internal thread structure and the external thread structure.
5. A graphite crucible internal temperature measuring device suitable for a high temperature induction furnace according to claim 3, wherein the upper end of the bakelite heat insulation block (2) is connected with an armored infrared probe (1) through a sleeve joint.
6. The graphite crucible internal temperature measuring device for a high temperature induction furnace according to claim 1, wherein the extension pipe (3) is provided with a heat radiation window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223214062.1U CN219178733U (en) | 2022-12-01 | 2022-12-01 | Graphite crucible internal temperature measuring device suitable for high temperature induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223214062.1U CN219178733U (en) | 2022-12-01 | 2022-12-01 | Graphite crucible internal temperature measuring device suitable for high temperature induction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219178733U true CN219178733U (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223214062.1U Active CN219178733U (en) | 2022-12-01 | 2022-12-01 | Graphite crucible internal temperature measuring device suitable for high temperature induction furnace |
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| CN (1) | CN219178733U (en) |
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2022
- 2022-12-01 CN CN202223214062.1U patent/CN219178733U/en active Active
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