EP0361147B1 - Four continu pour le traitement thermique d'articles, en particulier de tubes céramiques - Google Patents

Four continu pour le traitement thermique d'articles, en particulier de tubes céramiques Download PDF

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Publication number
EP0361147B1
EP0361147B1 EP89116412A EP89116412A EP0361147B1 EP 0361147 B1 EP0361147 B1 EP 0361147B1 EP 89116412 A EP89116412 A EP 89116412A EP 89116412 A EP89116412 A EP 89116412A EP 0361147 B1 EP0361147 B1 EP 0361147B1
Authority
EP
European Patent Office
Prior art keywords
furnace
articles
carriages
heat treatment
carriage
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
EP89116412A
Other languages
German (de)
English (en)
Other versions
EP0361147A1 (fr
Inventor
Luigi Andrea Dr. Ing. Poggi
G.M.C. Verheyden, Jr.
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.)
Apt Anlagen fur Pyrotechnik GmbH
A P T ANLAGEN fur PYROTECHNIK GmbH
Original Assignee
Apt Anlagen fur Pyrotechnik GmbH
A P T ANLAGEN fur PYROTECHNIK GmbH
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 Apt Anlagen fur Pyrotechnik GmbH, A P T ANLAGEN fur PYROTECHNIK GmbH filed Critical Apt Anlagen fur Pyrotechnik GmbH
Publication of EP0361147A1 publication Critical patent/EP0361147A1/fr
Application granted granted Critical
Publication of EP0361147B1 publication Critical patent/EP0361147B1/fr
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
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
    • F27B9/022—With two tracks moving in opposite directions
    • F27B9/023—With two tracks moving in opposite directions with a U turn at one end
    • F27B9/024—With two tracks moving in opposite directions with a U turn at one end with superimposed tracks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • F27B9/2415—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace) the charge rotating about an axis transversal to the axis of advancement of the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
    • F27B9/262—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers on or in trucks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/32—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means

Definitions

  • the invention relates to a continuous furnace for the heat treatment of cylindrical objects, in particular ceramic tubes, with an oven space which is delimited by an oven ceiling which is stationary in the direction of flow, opposite one another and a floor and which is divided into several chambers by partition walls and has trolleys for the objects arranged one behind the other. which each carry one of the partitions and a section of the furnace floor at their front ends.
  • DE-A 1 508 506 In another known continuous furnace (DE-A 1 508 506), which is not specifically designed for cylindrical objects to be rotated about its own axis, the objects are carried on the trolley through the furnace space.
  • the furnace space is divided into several chambers by end walls carried by the car, so that it is possible with such a furnace to transport the objects through the furnace without repositioning and to isolate individual furnace sections from one another in terms of temperature.
  • the latter is particularly advantageous for the sintering zone, in which the heat treatment can be carried out over a short section when the transport is stationary.
  • the invention is based on the object, in a continuous furnace for the heat treatment of objects of the type mentioned, to design the trolleys in such a way that the objects on the trolleys carry out a self-rotation independent of the passage as they pass through the furnace and the drive means provided for this purpose are protected from thermal stress are.
  • the side walls are formed at least in their lower region in the direction of passage as movable parts which are carried by the carriage, and that the carriages are equipped with support rollers for the objects which extend through the side wall parts and are coupled with drives arranged on the carriage outside the furnace space.
  • the items to be heat treated remain on the trolley throughout the passage through the furnace.
  • This effort is small in relation to the effort required to transfer the objects from one means of transport to another means of transport.
  • the handling of the objects is gentle because of the unnecessary implementation. This is particularly important for thin-walled ceramic pipes.
  • the furnace roof can be raised.
  • the upper parts of the side walls could also be designed to be movable, in particular be raised together with the ceiling.
  • pinch seals can be provided between the parts coming into contact with one another, such as the wall parts and the ceiling and the end faces. Sealing using sand channels is possible, but the sealing is not optimal. When using sand channels, there is no need to lift the top cover together with the upper parts of the side walls in order to be able to move the trolleys.
  • openings for burners and air nozzles are preferably arranged in the upper side wall parts.
  • a return path for the wagons extends in the direction of flow under or next to the furnace and that for the wagons a transfer device running between this return lane and the lane through the furnace space, eg a lifting platform is provided.
  • Each carriage 4 carries a structure 10 on a chassis 9. All of the carriages 4 arranged close together on the pair of rails 2 are constructed identically. The carriage 4 is gradually transported over the rails 2 by feed means, not shown. The last carriage 4 pushes the carriage 4 in front of it.
  • the actual continuous furnace is divided into an upper part, which comprises the furnace ceiling 11, 12, 13 and the upper part of the side walls 14, 15, and a lower part.
  • the lower part is formed by the superstructures 10 of the carriages 4 and consists in each carriage 4 of the floor 16, a partition 17 arranged at the end at the end and the lower parts of side walls 18, 19.
  • the upper part can be lifted off the lower part by lifting devices 20, 21, which are shown in FIG. 3 for the combustion chamber, so that the carriages 4 can be moved freely.
  • a plurality of parallel support roller sets 22, 23 are arranged, each of which carries a ceramic tube 24 to be treated.
  • the carriages 4 in FIG. 1 are equipped with more support rollers 22, 23 in comparison to the carriages 4 according to FIG.
  • the support rollers 22,23 are through the side walls 18,19 guided on the outside and coupled to drives 25, which can consist of electric motors, gears and chains.
  • the motors can be supplied with power by pantographs which slide on stationary power rails.
  • Openings 26, 27 in which burners and nozzles for ventilation can be arranged are distributed in the side walls 14, 15 of the upper part
  • the furnace space is divided into several chambers one behind the other, namely in the direction of passage in two drying chambers T 1, T 2, a heating chamber W, a combustion chamber B and two cooling chambers K 1, K 2.
  • the chamber spaces of the heating chamber W, the combustion chamber B and the cooling chambers K1, K2 are connected via a pipe 28 to the drying chambers T1, T2, so that the hot exhaust air from the heating chamber W and the combustion chamber B and when cooling in the cooling chambers K1, K2 heated air passed into the drying chambers T1, T2 and can be used for drying the pipes.
  • circulation fans are installed in the ceiling.
  • Objects to be heat-treated, in particular ceramic pipes, can be heat-treated in the continuous furnace according to the invention if the transport is interrupted but the self-rotation is maintained according to a desired temperature curve. It is not necessary to move from one means of transport to another means of transport during the entire transport through the continuous furnace. Since only the support rollers for the objects to be heat-treated are arranged inside the furnace chamber, the other mechanical parts, such as the drive, outside the furnace chamber, the effort for highly heat-resistant parts is kept within limits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (4)

  1. Four à passage continu pour le traitement thermique d'objets cylindriques, notamment de tubes céramiques (24) possédant une chambre de four délimitée par un plafond de four (12) fixe dans la direction du passage, des parois latérales opposées (14, 15, 18, 19) et un fond (16), et subdivisée en plusieurs chambres (T1, T2, W, B, K1, K2) par des cloisons (17), et des chariots (4), qui sont disposés dans le four, immédiatement les uns à la suite des autres pour transporter les objets (24) et qui portent, à leurs extrémités frontales respectives, une des cloisons (17), et un segment (16) du fond du four, dans lequel les parois latérales (14, 15, 18, 19) sont constituées, au moins dans leur région inférieure, par des parties mobiles (18, 19) dans la direction du passage, qui sont portées par un chariot (4), et les chariots (4) sont équipés de rouleaux porteurs (22, 23) destinés à porter les objets (24), qui traversent les parties (18, 19) des parois latérales et sont accouplés à des entraînements (25) disposés sur le chariot (4), à l'extérieur de la chambre du four.
  2. Four à passage continu selon la revendication 1, caractérisé en ce que le plafond (12) du four et éventuellement les parties supérieures (14, 15) des parois latérales supérieures est ou sont relevables.
  3. Four à passage continu selon la revendication 1 ou 2, caractérisé en ce que des ouvertures (26, 27) destinées à recevoir des brOleurs et des buses d'air sont agencées dans les parties supérieures (14, 15) des parois latérales.
  4. Four à passage continu selon une des revendications 1 a 3, caractérisé en ce qu'une voie de retour (3) pour les chariots (4) s'étend dans la direction du passage au-dessous ou à côté du four et en ce qu'il est prévu pour les chariots (4) un dispositif de transfert, notamment une plate-forme élévatrice (7, 8) qui va et vient entre cette voie de retour (3) et la trajectoire de passage de la chambre du four.
EP89116412A 1988-09-27 1989-09-06 Four continu pour le traitement thermique d'articles, en particulier de tubes céramiques Expired - Lifetime EP0361147B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832734 1988-09-27
DE3832734A DE3832734C1 (fr) 1988-09-27 1988-09-27

Publications (2)

Publication Number Publication Date
EP0361147A1 EP0361147A1 (fr) 1990-04-04
EP0361147B1 true EP0361147B1 (fr) 1994-08-17

Family

ID=6363786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116412A Expired - Lifetime EP0361147B1 (fr) 1988-09-27 1989-09-06 Four continu pour le traitement thermique d'articles, en particulier de tubes céramiques

Country Status (4)

Country Link
US (1) US5006063A (fr)
EP (1) EP0361147B1 (fr)
AT (1) ATE110160T1 (fr)
DE (2) DE3832734C1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407441B (de) * 1993-03-11 2001-03-26 Eichhorn Epl Ag Vorrichtung zum trocknen und/oder brennen von keramischem gut, insbesondere lochziegeln
ZA951223B (en) * 1994-02-16 1995-10-18 Silvestrini J A Apparatus for thermally conditioning cylindrical containers
AT401574B (de) * 1994-03-18 1996-10-25 Eichhorn Epl Ag Vorrichtung zum trocknen und bzw. oder brennen von keramischem gut
DE19635991A1 (de) * 1996-09-05 1999-03-25 Brakemeier Karl Heinz Brennofen insbesondere für keramische Erzeugnisse
NL1011465C2 (nl) * 1999-03-05 2000-09-14 Heattreat Advising Company N V Oveninrichting.
JP4697408B2 (ja) * 2005-06-02 2011-06-08 関東冶金工業株式会社 ろう付け炉
US7507087B2 (en) * 2005-12-07 2009-03-24 Ajax Tocco Manethermic Corporation Method and apparatus to provide continuous movement through a furnace
US7789660B2 (en) * 2005-12-07 2010-09-07 Ajax Tocco Magnethermic Corporation Furnace alignment system
HUE048883T2 (hu) * 2007-12-13 2020-08-28 Molecor Tecnologia Sl Telepítés, kemence és elõformázott csövek hevítési módszere azok molekuláris orientációja elõtt
GB0808083D0 (en) * 2008-05-06 2008-06-11 Rolls Royce Plc An apparatus and method for heat treatment
GB201317194D0 (fr) * 2013-09-27 2013-11-13 Ebner Ind Ofenbau

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899189A (en) * 1959-08-11 Apparatus for processing compressed fuel
FR404208A (fr) * 1909-06-19 1909-11-25 John L Harper Four électrique pour la cuisson des briques, de la poterie et autres usages
FR505035A (fr) * 1919-10-18 1920-07-21 Henri Breuille Système de four tunnel à mouffles pour la cuisson, à l'abri des flammes, de produits divers
GB177561A (en) * 1920-10-29 1922-03-29 Woodall Duckham & Jones 1920 L Improvements in tunnel kilns
US2742002A (en) * 1952-09-02 1956-04-17 George P Reintjes Sealing shoe for furnaces
FR1185972A (fr) * 1957-11-12 1959-08-11 Procedes Ferro Four continu de cuisson notamment pour produits céramiques
DE1135160B (de) * 1959-10-12 1962-08-23 Accumulatoren Fabrik Ag Tunnelofen fuer die Sinterung von Kunststoffpulverschichten
US3071356A (en) * 1960-08-08 1963-01-01 Lindberg Eng Co Heat treating furnace
AT263602B (de) * 1965-11-09 1968-07-25 Heinrich Ing Ottowitz Tunnelofen
DE1935921A1 (de) * 1969-07-15 1971-03-11 Ooms Ittner & Cie Kg Ofen zur thermischen Behandlung roehren- oder stabfoermigen Gutes aus keramischen oder diesen aehnlichen Massen
SU367781A1 (ru) * 1971-05-11 1983-12-07 Государственный Научно-Исследовательский Институт Керамической Промышленности Туннельно-щелева печь
GB1473839A (en) * 1974-09-19 1977-05-18 Etchells Ltd D Furnaces
JPS6016492B2 (ja) * 1979-06-14 1985-04-25 株式会社クボタ 鋳鉄管の熱処理装置
US4403954A (en) * 1980-08-08 1983-09-13 Kubota, Ltd. Apparatus for heat-treating pipes
DE3132373A1 (de) * 1981-01-16 1982-07-29 Didier Engineering Gmbh, 4300 Essen Ofen zum erwaermen von brammen, knueppeln und rohlingen
US4505670A (en) * 1983-03-02 1985-03-19 Imdec S.R.L Apparatus for moving and thermally conditioning cylindrical containers
ATE28510T1 (de) * 1983-07-19 1987-08-15 Apt Anlagen Fuer Pyrotechnik Verfahren zur waermebehandlung von zylindrischen gegenstaenden, insbesondere roehren, insbesondere aus keramischem material, und durchlaufofen zur durchfuehrung des verfahrens.
CA1236688A (fr) * 1985-10-16 1988-05-17 Arnold G. Meyers Four de traitement thermique, vieillissement ou relaxation des contraintes et tensions
US4718847A (en) * 1987-03-24 1988-01-12 Ian Manson Kiln system
FR2617582B1 (fr) * 1987-07-01 1990-03-09 Cavallera Claude Four de sechage et de cuisson de produits refractaires

Also Published As

Publication number Publication date
ATE110160T1 (de) 1994-09-15
DE58908210D1 (de) 1994-09-22
DE3832734C1 (fr) 1990-03-29
US5006063A (en) 1991-04-09
EP0361147A1 (fr) 1990-04-04

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