CH232396A - Optical temperature measuring device for hot melts. - Google Patents
Optical temperature measuring device for hot melts.Info
- Publication number
- CH232396A CH232396A CH232396DA CH232396A CH 232396 A CH232396 A CH 232396A CH 232396D A CH232396D A CH 232396DA CH 232396 A CH232396 A CH 232396A
- Authority
- CH
- Switzerland
- Prior art keywords
- measuring device
- temperature measuring
- tube
- filling
- optical temperature
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims description 7
- 239000012943 hotmelt Substances 0.000 title claims description 4
- 238000007654 immersion Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 150000003839 salts Chemical group 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 4
- 229910001626 barium chloride Inorganic materials 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0037—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids
- G01J5/004—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids by molten metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/041—Mountings in enclosures or in a particular environment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/046—Materials; Selection of thermal materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/05—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path
- G01J5/051—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path using a gas purge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0887—Integrating cavities mimicking black bodies, wherein the heat propagation between the black body and the measuring element does not occur within a solid; Use of bodies placed inside the fluid stream for measurement of the temperature of gases; Use of the reemission from a surface, e.g. reflective surface; Emissivity enhancement by multiple reflections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Description
Optisches Temperaturmessgerät für heisse Sehmelzen.
Die Erfindung betrifft ein optisches TemperaturmeBgerät für heisse Schmelzen, das ein Rohr mit geschlossenem Eintauchende aufweist, und besteht darin, dass das Eintauchende mit einem Stoff gefüllt ist, der im Betriebe flüssig und wärmeleitend ist und dessen Strahlung zur optischen Tempera turmessung dient. Der Füllstoff kann ein Salz sein. Er kann auch ein Metall sein. In dem Eintauchende können Führungsmittel zum Umwälzen der Rohrfüllung vorgesehen sein.
Die Zeichnung veranschaulicht beispielsweise einige Ausführungsformen des Tempe raturmessgerätes nachtder Erfindung.
Fig. 1 ist ein Aufriss durch einen Salzbadofen mit einem eingetauchten Me?gerÏt ;
Fig. 2 ist ein Aufriss durch einen Salzbadofen mit metallenem Tiegel und einem angebauten Messgerät ;
Fig. 3 ist ein Längsschnitt durch das Eintauchende des Rohres eines Messgerätes.
Nach Fig. 1 sind in einem keramischen Tiegel 1 Elektroden 2 vorgesehen. Das Rohr 3 ist schräg in die Schmelze 4 eingetaucht.
Das geschlossene Eintauchende des Rohres 3 enthält eine Füllung 5, die bei der Betriebs- temperatur flüssig ist und eine gute Wärmeleitfähigkeit besitzt. Als solche Füllung kann bei Temperaturen von etwa 700 bis 1000 C Bariumchlorid mit einem Zusatz von Kalium- chlorid dienen. Das Bariumchlorid schmilzt bei etwa 900 C. Der Zusatz von Kalium- chlorid setzt diesen Schmelzpunkt noch wei- ter herunter. Eine weitere Steigerung der Dünnflüssigkeit des Bariumchlorids wird herbeigeführt durch einen weiteren Zusatz von Chlornatrium oder Chlorkalzium.
Bei hohen Temperaturen der Schmelze, beispielsweise über 1000 C, kann als Füllmittel für das Rohr Bariumchlorid ohne Zusätze benutzt werden. An Stelle eines Salzes kann auch ein Metall als Füllung dienen, beispielsweise bei Temperaturmessungen bis etwa 850¯ C eine Füllung aus Blei, bei Temperaturen ber 850¯ C eine F llung aus Blei mit einem Zusatz von Kadmium oder eineandere geeignete Bleilegierung.
Das Rohr 3 kann zur Absaugung etwaiger Dampfe von einem Luft-oder Gasstrom durchsp lt werden, wozu ein Einla?anschlu? 6 und ein Auslassansehluss 7 am obern Ende des Rohres vorgesehen ist. Am obern Ende des Rohres ist eine optische Me?einrichtung 8 bekannter Art angebracht ; für die Temperaturmessung wird also nicht die Strahlung der hei?en Schmelze selbst, oder eines in diese eingetauchten Glührohres. sondern die Strahlung der geschmolzenen Füllung ver- wendet.
Bei dem Ausf hrungsbeispiel nach Fig. 2 ist in einer keramischen Ummauerung ein metallener Tiegel 10 eingesetzt, in dessen Seitenwand das Rohr 3 des Me?gerÏtes so schräg eingeschweisst ist. dass das Eintauchende in die Schmelze hineinragt. Das Rohr 3 besteht dabei zum Beispiel aus dem gleichen Werkstoff wie der Tiegel li wäh- rend das Messgerät im übrigen demjenigen nach Fig. 1 entspricht.
TTm eine gleichmässige Temperatür der Füllung des Rohreintauehendes zu erzielen. ist eine UmwÏlzung der Füllung erwünscht.
Zu diesem Zweek kann nach Fig. 3 in dem Rohr 3 ein Führungsmittel 11 in Gestalt eines Rohrstummels vorgesehen sein. der gleichachsig zum Rohr durch Abstandhalter 12 gehalten wird. Das obere Ende des Rohrstummels 11 ist etwa parallel zur Oberfläehe 13 der Füllung abgeschnitten. Infolge der Wärmeübertragung von der Rohrwand auf die Füllung entsteht in dieser eine Umwäl- zung. wie sie durch die eingezeichneten Pfeile veranschaulicht ist. Die flüssige Fül lung fliesst an der Wandung des Rohres hoeh und durch das Innere des Rohrstummels 11 wieder abwÏrts.
An Stelle eines metallene Rohres kann auch ein Rohr aus einem keramischen Stoff benutzt werden, falls die Temperatur und die sonstigen Verhältnisse des Betriebes es zulassen. Beispielsweise kann das Rohr 3 aus einem Quarzglas oder einem Ïhnlichen Stoff bestehen.
Optical temperature measuring device for hot sea melts.
The invention relates to an optical temperature measuring device for hot melts, which has a tube with a closed immersion end, and consists in that the immersion end is filled with a substance that is liquid and thermally conductive in operation and whose radiation is used for optical temperature measurement. The filler can be a salt. It can also be a metal. Guide means for circulating the pipe filling can be provided in the immersion end.
For example, the drawing illustrates some embodiments of the temperature measuring device according to the invention.
Fig. 1 is an elevation through a salt bath furnace with an immersed meter;
Fig. 2 is an elevational view of a salt bath furnace with a metal crucible and an attached measuring device;
Fig. 3 is a longitudinal section through the immersed end of the tube of a measuring device.
According to Fig. 1 1 electrodes 2 are provided in a ceramic crucible. The tube 3 is immersed in the melt 4 at an angle.
The closed immersion end of the tube 3 contains a filling 5 which is liquid at the operating temperature and has good thermal conductivity. Barium chloride with an addition of potassium chloride can serve as such a filling at temperatures of about 700 to 1000 C. The barium chloride melts at around 900 C. The addition of potassium chloride lowers this melting point even further. A further increase in the fluidity of the barium chloride is brought about by adding more sodium chloride or calcium chloride.
At high melt temperatures, for example above 1000 C, barium chloride can be used as a filler for the tube without additives. Instead of a salt, a metal can also serve as a filling, for example a filling made of lead for temperature measurements up to approx. 850¯ C, for temperatures above 850¯ C a filling made of lead with an addition of cadmium or another suitable lead alloy.
The pipe 3 can be flushed through by a stream of air or gas for the suction of any vapors, for which purpose an inlet connection? 6 and an outlet connection 7 is provided at the top of the tube. An optical measuring device 8 of known type is attached to the upper end of the tube; The radiation from the hot melt itself, or from a glow tube immersed in it, is not used for temperature measurement. but the radiation from the molten filling is used.
In the exemplary embodiment according to FIG. 2, a metal crucible 10 is inserted into a ceramic walling, into the side wall of which the tube 3 of the measuring device is welded at an angle. that the immersion end protrudes into the melt. The tube 3 consists, for example, of the same material as the crucible 1, while the measuring device otherwise corresponds to that according to FIG.
TTm to achieve a uniform temperature of the filling of the pipe introspective. the filling should be turned over.
For this purpose, according to FIG. 3, a guide means 11 in the form of a tube stub can be provided in the tube 3. which is held coaxially to the pipe by spacers 12. The upper end of the pipe stub 11 is cut off approximately parallel to the Oberfläehe 13 of the filling. As a result of the heat transfer from the pipe wall to the filling, a circulation occurs in this. as illustrated by the arrows shown. The liquid filling flows up on the wall of the pipe and back down through the inside of the pipe stub 11.
Instead of a metal pipe, a pipe made of a ceramic material can also be used, if the temperature and other conditions of the plant permit. For example, the tube 3 can consist of quartz glass or a similar substance.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE232396X | 1942-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH232396A true CH232396A (en) | 1944-05-31 |
Family
ID=5880704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH232396D CH232396A (en) | 1942-02-05 | 1943-01-14 | Optical temperature measuring device for hot melts. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH232396A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE872661C (en) * | 1951-07-01 | 1953-04-02 | Wladimir Dipl-Ing Lebedew | Method for determining temperatures, especially higher temperatures, with the aid of an absolutely black body and pyrometer for practicing the method |
WO2003044475A1 (en) * | 2001-10-30 | 2003-05-30 | Techint Compagnia Tecnica Internazionale S.P.A. | Device and method for discrete and continuous measurement of the temperature of molten metal in a furnace or recipient for its production or treatment |
-
1943
- 1943-01-14 CH CH232396D patent/CH232396A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE872661C (en) * | 1951-07-01 | 1953-04-02 | Wladimir Dipl-Ing Lebedew | Method for determining temperatures, especially higher temperatures, with the aid of an absolutely black body and pyrometer for practicing the method |
WO2003044475A1 (en) * | 2001-10-30 | 2003-05-30 | Techint Compagnia Tecnica Internazionale S.P.A. | Device and method for discrete and continuous measurement of the temperature of molten metal in a furnace or recipient for its production or treatment |
US7140765B2 (en) | 2001-10-30 | 2006-11-28 | Techint Compagnia Tecnica Internazionale S.P.A. | Device and method for discrete and continuous measurement of the temperature of molten metal in a furnace or recepient for its production or treatment |
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