EP0951632B1 - Hängevorrichtung für den einsatz in brennöfen zur herstellung keramischer bauteile - Google Patents

Hängevorrichtung für den einsatz in brennöfen zur herstellung keramischer bauteile Download PDF

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Publication number
EP0951632B1
EP0951632B1 EP97952736A EP97952736A EP0951632B1 EP 0951632 B1 EP0951632 B1 EP 0951632B1 EP 97952736 A EP97952736 A EP 97952736A EP 97952736 A EP97952736 A EP 97952736A EP 0951632 B1 EP0951632 B1 EP 0951632B1
Authority
EP
European Patent Office
Prior art keywords
hanging
silicon carbide
ceiling
aperture
hanging system
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.)
Expired - Lifetime
Application number
EP97952736A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0951632A1 (de
Inventor
Andreas Sonntag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Morgan Crucible Co PLC
Original Assignee
Morgan Crucible Co PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Morgan Crucible Co PLC filed Critical Morgan Crucible Co PLC
Publication of EP0951632A1 publication Critical patent/EP0951632A1/de
Application granted granted Critical
Publication of EP0951632B1 publication Critical patent/EP0951632B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D5/0056—Hangers

Definitions

  • the invention relates to a hanging device for the Use in kilns for the production of ceramic components.
  • Ceramic blanks, in particular large-format components, such as roll blanks, after the Drying can be fired. During the burning process can the ceramic components and in particular the roll blanks are hung in the kiln.
  • Ceramic components and in particular oven rolls Made of ceramic material are used for burning in accordingly trained oven chambers hung. Therefor fireproof retaining walls are usually used, on which cross struts are placed on top become.
  • these retaining walls are built into the kiln either from silicon carbide stones (nitride or silicate bonded) or from Al 2 O 3 stones (corundum).
  • the furnace chambers intended for firing must be used in their dimensions to the ones to be burned ceramic components can be adapted to an economical Ensure that the furnace is filled.
  • the maximum size of the Combustion chamber based on the maximum required Firing temperature and taking into account that an even temperature distribution in the Kiln is achieved to a very high quality to secure the burned components (oven rolls).
  • US 4,721,460 A discloses a hanging device for the hanging firing of ceramic components with Beams and a variety of rod-shaped Hanging elements.
  • the hanging device designed according to the invention exists thereby consisting of at least two elements Silicon carbide exist and the form-fitting with each other are connected that the on the ceiling of the Kiln attachable hanging element and one to this fixed support beam, relative movements of the enabling both elements to be used become.
  • the primary aim is to warm up during the heating phase and cooling after completion temperature differences occurring during the firing process with the associated thermal expansion be intercepted.
  • the support beam to be used according to the invention has according to the number of hanging elements used Openings through which the hanging elements are led are and the one below the supporting beam remaining part of the hanging elements an expansion has, which is advantageously larger than that free cross section of the openings.
  • the openings and the said can be advantageous Widenings corresponding to each other conical be trained to apply an even force to be achieved while avoiding lateral and transverse forces.
  • At least two hanging elements are advantageous attached to the ceiling of the kiln and the attachment takes place in the form that these hanging elements partially led through the ceiling of the kiln and be locked there above the ceiling.
  • the supporting beams are advantageously located with the hanging device designed according to the invention immediately below the furnace ceiling and it can be turned on this with further auxiliary structures for hanging the blanks to be burned are hung up.
  • a thermal and mechanically heavy-duty hanging device for Provided the cyclical burning conditions withstands over a long period of time. This is even with the very high temperatures in the kiln the relatively large thermal expansion of the refractory Inner furnace lining, heat transfer and Temperature gradients, particularly in the anchoring area the furnace roof must be taken into account, the case.
  • Hanging device is the Possibility that the blanks to be burned and thereby especially the oven rolls to be burned very tight and attached directly below the furnace ceiling can be, so that an easy access to the Suspension and re-acceptance is made possible and also the space available in the kiln can be used optimally.
  • the hanging device according to the invention has the Advantage that, although the attacking on the support beam Load occurs as a pure tensile load, which actually be avoided with a ceramic construction should, because ceramics have a factor of 10 to 100 lower tensile strength compared to compressive strength has, can still be used.
  • the invention Solution also avoids, especially through the design of the positive connection between the hanging element and the supporting beam increased bending, Tension and / or torsional stresses that are local Stress increases and accordingly to breaks of the various components in these locations can.
  • the latter variant is preferred at the bottom Widening formed at the end of the hanging elements, at least in the area that is in direct contact as Support for the supporting beam is used, hemispherical is trained.
  • the radii used can be optimized for the spherical shape. Accordingly is the lower area of the openings in the Support beam, which is attached to the expansion of the hanging elements supports, also at least partially hemispherical formed as a corresponding pan, see above that hanging element and support beam depending on the radius ratio transmit the force over a ring area.
  • a radius ratio greater than 0.5 should preferably be used be respected.
  • the particularly inexpensive ball and socket arrangement for the hanging elements and the supporting beams allows a movable arrangement between them two elements, so that thermal expansion easily can be balanced and still a uniform Voltage distribution remains secured. Also other movements, e.g. through the currents in the Kiln caused or when opening and Depending on the blanks inevitably occur due to the overall relatively flexible construction are also largely intercepted.
  • Hanging elements and supporting beams are recrystallized Silicon carbide (R-SiC), silicon infiltrated Silicon carbide (SiSiC), nitride-bound Silicon carbide (N-SiC), sintered silicon carbide (S-SiC) or various mixtures of the above Silicon carbide.
  • hanging in a so-called overhead conveyor can be arranged. It is suitable for this a corresponding supporting structure to accommodate the vertically suspended oven rolls, with the parallel mutually aligned support beam 2 by means of hanging elements 1 are held. Each support beam should be 2 with at least two hanging elements 1, preferred three hanging elements 1 are held.
  • the hanging elements 1 will be in a preferred embodiment led through the furnace roof and anchored there above. A groove can be anchored in the hanging element 1 5 be formed, in which a correspondingly trained Lock can intervene, which then supports above the furnace ceiling and picks up the load.
  • the support beam 2 points accordingly the number of hanging elements used 1 at equal intervals to each other or in one symmetrical arrangement of openings 3, through which the respective hanging element 1 can be guided, until the support beam 2 on the widening 4 of the Hanging element 1 supports.
  • the lower part is the opening 3 of the support beam 2 at least partially hemispherical and the corresponding part of the expansion 4 of the hanging element 1 adapted accordingly to this shape trained so that both parts in this area form a ball and pan arrangement.
  • the upper part of the support beam 2 forms the Support belt 6 for the firing material.
  • the resulting theoretical power transmission line 7 is shown in FIG. 2.
  • the illustration in FIG. 2 shows in particular that the geometries to be used according to the invention ensure a uniform application of force with a corresponding stress distribution and thereby ensure that the thermally very stable silicon carbides can be used, although their tensile strength is limited.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Ceramic Products (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Details (AREA)
  • Carbon And Carbon Compounds (AREA)
EP97952736A 1996-12-20 1997-12-18 Hängevorrichtung für den einsatz in brennöfen zur herstellung keramischer bauteile Expired - Lifetime EP0951632B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19653483 1996-12-20
DE19653483A DE19653483C2 (de) 1996-12-20 1996-12-20 Hängevorrichtung für den Einsatz in Brennöfen zur Herstellung keramischer Bauteile
PCT/DE1997/002961 WO1998028583A1 (de) 1996-12-20 1997-12-18 Hängevorrichtung für den einsatz in brennöfen zur herstellung keramischer bauteile

Publications (2)

Publication Number Publication Date
EP0951632A1 EP0951632A1 (de) 1999-10-27
EP0951632B1 true EP0951632B1 (de) 2001-08-22

Family

ID=7815662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97952736A Expired - Lifetime EP0951632B1 (de) 1996-12-20 1997-12-18 Hängevorrichtung für den einsatz in brennöfen zur herstellung keramischer bauteile

Country Status (6)

Country Link
EP (1) EP0951632B1 (cs)
CZ (1) CZ297615B6 (cs)
DE (2) DE19653483C2 (cs)
ES (1) ES2163207T3 (cs)
PT (1) PT951632E (cs)
WO (1) WO1998028583A1 (cs)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850571A1 (de) * 1978-11-22 1980-06-04 Bbc Brown Boveri & Cie Rost fuer haengebahnofen
DE7922798U1 (de) * 1979-08-09 1979-11-08 Klefisch, Rudolf, 5000 Koeln Gehaenge fuer schlitzofen
US4721460A (en) * 1987-03-04 1988-01-26 Swindell Dressler International Corporation Tile firing support structure
DE4301841C2 (de) * 1993-01-23 1995-10-12 Riedhammer Gmbh Co Kg Periodischer Ofen
DE9308959U1 (de) * 1993-06-16 1993-08-12 Heinrich Zeidler Maschinenfabrik Gmbh & Co Kg, 95100 Selb Stapelbares Brennhilfsmittel für keramische Erzeugnisse
DE29507055U1 (de) * 1994-05-06 1995-07-06 Riedhammer GmbH und Co KG, 90411 Nürnberg Aufbau für einen Brenntisch
DE4436823C1 (de) * 1994-10-14 1996-05-02 Haldenwanger Tech Keramik Gmbh Tragkörper aus SiC und dessen Verwendung

Also Published As

Publication number Publication date
DE19653483C2 (de) 2002-02-28
EP0951632A1 (de) 1999-10-27
PT951632E (pt) 2001-11-30
DE59704403D1 (de) 2001-09-27
ES2163207T3 (es) 2002-01-16
DE19653483A1 (de) 1998-06-25
CZ161999A3 (cs) 1999-12-15
WO1998028583A1 (de) 1998-07-02
CZ297615B6 (cs) 2007-02-14

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