DE1816789B1 - Radiation protection body for high temperature ovens - Google Patents
Radiation protection body for high temperature ovensInfo
- Publication number
- DE1816789B1 DE1816789B1 DE19681816789 DE1816789A DE1816789B1 DE 1816789 B1 DE1816789 B1 DE 1816789B1 DE 19681816789 DE19681816789 DE 19681816789 DE 1816789 A DE1816789 A DE 1816789A DE 1816789 B1 DE1816789 B1 DE 1816789B1
- Authority
- DE
- Germany
- Prior art keywords
- radiation protection
- protection body
- high temperature
- body according
- sheet metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 title claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000011888 foil Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 239000003870 refractory metal Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/08—Means for preventing radiation, e.g. with metal foil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/075—Arrangements using an air layer or vacuum the air layer or the vacuum being delimited by longitudinal channels distributed around the circumference of a tube
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0033—Linings or walls comprising heat shields, e.g. heat shieldsd
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
- F27D5/0062—Shields for the charge
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
Strahlschutzkörper für Hochtemperaturöfen bestehen zumeist aus mehreren konzentrisch angeordneten Blechzylindern, die durch entsprechende Distanzstücke miteinander verbunden sind. Solange sich die Abmessungen dieser Strahlschutzkörper in mäßigen Grenzen halten, können die einzelnen Zylinder aus einem einzigen Stück Blech gefertigt werden. Bei größeren Abmessungen müssen mehrere Blechstücke durch Nieten oder Schweißen zu einem Zylinder verbunden werden. Auf diese Weise hergestellte Strahlschutzkörper weisen neben hohen Herstellungskosten auch technische Nachteile auf. So entstehen in den Strahlschutzkörpern thermische Spannungen, die zu einer Deformation bzw. zu einem Reißen der Zylinderbleche führen können. Nachteilig ist auch die starke Aufrauhung der Innenseite der Strahlschutzkörper, durch die die angestrebte Reflexion der Strahlung vermindert wird. Strahlschutzkörper aus Molybdän und Wolfram rekristallisieren bei hohen Betriebstemperaturen und verspröden dabei so stark, daß Reparaturen an beschädigten Strahlblechen praktisch nicht mehr durchgeführt werden können. Ein weiterer Nachteil von aus Blechen hergestellten Strahlschutzkörpern ist ihr verhältnismäßig großes Gewicht und ihr größerer Raumbedarf.Radiation protection bodies for high-temperature furnaces usually consist of several concentrically arranged Sheet metal cylinders that are connected to one another by appropriate spacers. As long as the The individual cylinders can be made from the dimensions of this radiation protection body within moderate limits a single piece of sheet metal. For larger dimensions, several pieces of sheet metal are required be connected to a cylinder by riveting or welding. Manufactured this way In addition to high manufacturing costs, radiation protection bodies also have technical disadvantages. So arise Thermal stresses in the radiation protection bodies, which lead to deformation or tearing of the Can lead cylinder sheets. Another disadvantage is the strong roughening of the inside of the radiation protection body, by which the desired reflection of the radiation is reduced. Radiation protection body Molybdenum and tungsten recrystallize at high operating temperatures and become so brittle that repairs to damaged radiant panels can practically no longer be carried out. A Another disadvantage of radiation protection bodies made from sheet metal is their relatively large size Weight and their larger space requirements.
Man hat versucht, die letzterenNachteile dadurch zu vermeiden, daß man Strahlschutzkörper aus mehreren Lagen von Metallfolien gebildet hat, die durch geeignete Distanzstücke oder durch Ausbeulungen in den Folien im Abstand voneinander gehalten wurden. Es zeigte sich jedoch, daß derartige Strahlschutzkörper in der unmittelbaren Nachbarschaft der heißen Zone des Ofens einem sehr starken Verschleiß ausgesetzt sind. Die Folien werden durch Verdampfen der Oberflächenschicht abgebaut, oder sie verschweißen miteinander, wodurch ihre wärmedämmende Wirkung teilweise verlorengeht.Attempts have been made to avoid the latter disadvantages by making radiation protection bodies from several Has formed layers of metal foils, which by means of suitable spacers or bulges in the foils were kept at a distance from each other. It was found, however, that such radiation protection bodies very heavy wear and tear in the immediate vicinity of the hot zone of the furnace are exposed. The films are degraded by evaporation of the surface layer, or they weld together, which means that some of their thermal insulation properties are lost.
Die Erfindung betrifft einen Strahlschutzkörper für Hochtemperaturöfen, der diese Nachteile nicht aufweist. Der erfindungsgemäße Strahlschutzkörper besteht aus einem Gerüst aus hochtemperaturfestem Material, das an der der Strahlung ausgesetzten Seite mit leicht auswechselbaren metallischen Strahlschutzelementen abgedeckt ist und an der kühleren Seite mit mehreren voneinander im Abstand gehaltenen Folienlagen umhüllt ist. Als Werkstoff für den erfindungsgemäßen Strahlschutzkörper kommen in erster Linie hochschmelzende Metalle wie Wolfram, Molybdän und Tantal in Frage. In einzelnen Fällen können jedoch auch keramische Werkstoffe verwendet werden. Der besondere Vorteil des neuen Strahlschutzkörpers besteht darin, daß die der höchsten Ofentemperatur ausgesetzten Teile desselben auswechselbar ausgebildet sind. Das Gerüst des erfindungsgemäßen Strahlschutzkörpers ist vor den höchsten Ofentemperaturen geschützt. Der überwiegende Teil der wärmedämmenden Wirkung des Strahlschutzkörpers wird durch die das Gerüst umhüllenden Folienlagen erreicht. Sie sind an einer Stelle des Strahlschutzkörpers angeordnet, an der sie verhältnismäßig geringen Temperaturen ausgesetzt sind, so daß sie nur einem mäßigen Verschleiß unterliegen.The invention relates to a radiation protection body for high-temperature furnaces which does not have these disadvantages. The radiation protection body according to the invention consists of a structure made of high-temperature resistant Material on the side exposed to radiation with easily replaceable metallic radiation protection elements is covered and on the cooler side with several spaced apart Foil layers is wrapped. The primary material used for the radiation protection body according to the invention is Line refractory metals like tungsten, molybdenum and tantalum in question. In individual cases however, ceramic materials can also be used. The special advantage of the new radiation protection body consists in the fact that the parts exposed to the highest furnace temperature are interchangeable are trained. The framework of the radiation protection body according to the invention is in front of the protected from the highest oven temperatures. Most of the insulating effect of the The radiation protection body is achieved through the film layers surrounding the framework. You are at one Place of the radiation protection body arranged at which they are exposed to relatively low temperatures are so that they are subject to only moderate wear.
Ein Ausführungsbeispiel der Erfindung wird an Hand der F i g. 1 bis 7 näher erläutert.An exemplary embodiment of the invention is illustrated with reference to FIGS. 1 to 7 explained in more detail.
In den F i g. 1 und 2 sind Beispiele für die Ausbildung des Gerüstes im Grundriß dargestellt. Es besteht aus gewelltem Blech aus hochschmelzendem Metall, das gemäß Fig. 1 eine kreisförmige und gemäß F i g. 2 eine quadratische Grundform aufweist. Das Gerüst kann aber auch massiv ausgebildet sein, oder es kann aus miteinander verflochtenen oder verwebten Drähten gebildet sein. Die gesamte Anordnung eines erfindungsgemäßen Strahlschutzkörpers im Grundriß zeigt Fig. 3. Das Gerüst wird durch das gewellte Blech 1 gebildet. Zur Stabilisierung des Gerüstes und zur Verbindung mit den übrigen Teilen des Strahlschutzkörpers sind die Drahtringe 2 und 3 vorgesehen. Sie sind entweder in Bohrungen des Gerüstes 1 eingezogen oder in horizontale Schlitze des Gerüstes, eingelegt und verankert, z.B. mittels der Ösen 4. Zumeist werden jeweils mehrere Drahtringe übereinander angeordnet. An den inneren Drahtringen 2 sind die Strahlschutzelemente 5 aufgehängt. Die Ausbildung dieser Strahlschutzelemente zeigen die F i g. 4, 5 und 6 im Aufriß, Grundriß und Seitenriß. Sie bestehen aus Blechstücken 5 mit je zwei Fahnen 6, die umgebogen sind. Sie werden damit an den Drahtringen 2 aufgehängt. Die Strahlschutzelemente 5 sind dachziegelartig angeordnet und dekken die innere Seite des Gerüstkörpers vollständig ab. Die Anordnung der Strahlschutzelemente an einem Gerüstkörper mit ebener Oberfläche ist in F i g. 7 dargestellt. An weiteren Einzelheiten sind in F i g. 3 noch die verschiedenen Folienlagen 7 dargestellt, die den Gerüstkörper 1 umhüllen. Die Folienlagen können z. B. mit Drahtsplinten an den Drahtringen 3 aufgehängt werden. Zum Schutz der Folien kann der Strahlschutzkörper noch mit einem Blechmantel 8 umgeben werden.In the F i g. 1 and 2 are examples of the construction of the scaffolding shown in plan. It consists of corrugated sheet metal of refractory metal, which according to FIG. 1 a circular and according to F i g. 2 has a square basic shape. The frame can also be made solid, or it can be formed from wires intertwined or interwoven. The whole arrangement a radiation protection body according to the invention in plan is shown in FIG. 3. The framework is through the corrugated sheet 1 is formed. To stabilize the framework and to connect it to the other parts The wire rings 2 and 3 are provided for the radiation protection body. They are either in bores of the Scaffolding 1 drawn in or in horizontal slots in the scaffolding, inserted and anchored, e.g. by means of of the eyelets 4. Usually several wire rings are arranged one above the other. On the inside Wire rings 2, the radiation protection elements 5 are suspended. The formation of these radiation protection elements show the F i g. 4, 5 and 6 in elevation, plan and Side crack. They consist of sheet metal pieces 5 each with two flags 6 that are bent over. You will with it suspended from the wire rings 2. The radiation protection elements 5 are arranged like roof tiles and cover the inner side of the scaffolding body completely. The arrangement of the radiation protection elements on one A framework body with a flat surface is shown in FIG. 7 shown. Further details are shown in FIG. 3 the various film layers 7 which enclose the frame body 1 are also shown. The film layers can e.g. B. be hung on the wire rings 3 with wire cotter pins. To protect the foils, the The radiation protection body can still be surrounded by a sheet metal jacket 8.
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT12268A AT279190B (en) | 1968-01-05 | 1968-01-05 | Blast protection body for high temperature furnaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1816789B1 true DE1816789B1 (en) | 1969-10-16 |
Family
ID=3482086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681816789 Pending DE1816789B1 (en) | 1968-01-05 | 1968-12-21 | Radiation protection body for high temperature ovens |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3558113A (en) |
| AT (1) | AT279190B (en) |
| CH (1) | CH499077A (en) |
| DE (1) | DE1816789B1 (en) |
| FR (1) | FR1597343A (en) |
| GB (1) | GB1196070A (en) |
| NL (1) | NL139387B (en) |
| SE (1) | SE339289B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024338A (en) * | 1973-11-17 | 1977-05-17 | Laszlo Kortvelyessy | High temperature heat insulation |
| DE9301293U1 (en) * | 1993-01-30 | 1993-03-11 | Ipsen Industries International Gmbh, 4190 Kleve | Holder for partial heat treatment of tools |
| DE102005001502A1 (en) * | 2005-01-10 | 2006-07-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Radiation shield |
| AT16588U1 (en) * | 2018-12-10 | 2020-02-15 | Plansee Se | Shielding for a high temperature furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3185460A (en) * | 1963-08-15 | 1965-05-25 | Pacific Scientific Co | Vacuum furnace |
| US3317203A (en) * | 1963-10-28 | 1967-05-02 | Union Carbide Corp | Radiation shield for induction furnace |
| US3327041A (en) * | 1964-04-30 | 1967-06-20 | Sylvania Electric Prod | Radiant heat reflecting device |
| US3285593A (en) * | 1964-09-04 | 1966-11-15 | Gen Electric | Furnace heat shield |
| US3456935A (en) * | 1967-09-20 | 1969-07-22 | Alco Standard Corp | Heat treating furnace with shielding packs |
-
1968
- 1968-01-05 AT AT12268A patent/AT279190B/en not_active IP Right Cessation
- 1968-12-12 NL NL686817860A patent/NL139387B/en unknown
- 1968-12-13 GB GB59308/68A patent/GB1196070A/en not_active Expired
- 1968-12-20 CH CH1903668A patent/CH499077A/en not_active IP Right Cessation
- 1968-12-21 DE DE19681816789 patent/DE1816789B1/en active Pending
- 1968-12-30 FR FR1597343D patent/FR1597343A/fr not_active Expired
- 1968-12-31 US US788195A patent/US3558113A/en not_active Expired - Lifetime
-
1969
- 1969-01-03 SE SE00058/69A patent/SE339289B/xx unknown
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| US3558113A (en) | 1971-01-26 |
| NL6817860A (en) | 1969-07-08 |
| NL139387B (en) | 1973-07-16 |
| FR1597343A (en) | 1970-06-22 |
| GB1196070A (en) | 1970-06-24 |
| SE339289B (en) | 1971-10-04 |
| AT279190B (en) | 1970-02-25 |
| CH499077A (en) | 1970-11-15 |
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