WO2001033152A1 - Fours a sole tournante destines au traitement thermique de pieces - Google Patents

Fours a sole tournante destines au traitement thermique de pieces Download PDF

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Publication number
WO2001033152A1
WO2001033152A1 PCT/EP2000/009735 EP0009735W WO0133152A1 WO 2001033152 A1 WO2001033152 A1 WO 2001033152A1 EP 0009735 W EP0009735 W EP 0009735W WO 0133152 A1 WO0133152 A1 WO 0133152A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
rotary hearth
hearth furnace
gap
rotary
Prior art date
Application number
PCT/EP2000/009735
Other languages
German (de)
English (en)
Inventor
Horst Becker
Original Assignee
Loi Thermprocess 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 Loi Thermprocess Gmbh filed Critical Loi Thermprocess Gmbh
Priority to AU79144/00A priority Critical patent/AU7914400A/en
Publication of WO2001033152A1 publication Critical patent/WO2001033152A1/fr

Links

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
    • F27B9/14—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
    • F27B9/16—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 circular or arcuate path

Definitions

  • the invention relates to a rotary hearth furnace according to the preamble of claim 1.
  • Such a rotary hearth furnace is known from DE 34 27 716.
  • the rotary hearth furnace has an annular rotary hearth that rotates between two fixed brick furnace walls. Gaps are formed between the movable rotary hearth and the fixed walls, under which there are oil cups into which aprons are immersed, which are attached to the rotary hearth and / or to the walls.
  • the oil cups seal the rotary hearth gas-tight to the installation space of the furnace.
  • the oil is cooled during the heat treatment.
  • the sealing of the two columns is structurally relatively complex.
  • the furnace space is divided into several treatment zones by vertically movable doors.
  • the workpieces are transported through the treatment zones in baskets or on pallets. These are distributed across the entire width of the transport area.
  • the center of the annular transport surface is called the pitch circle diameter, which is an important design dimension. An inner wall can no longer be realized below a critical pitch circle diameter, so that this type of furnace can only be built with pitch circle diameters above a limit value.
  • the invention is therefore based on the object of improving a rotary hearth furnace of the type mentioned in such a way that it is of simple construction and can be used universally.
  • the rotary hearth furnace according to the invention can be built and made possible with relatively small pitch circle diameters the heat treatment in different treatment zones, which are separated by doors.
  • the construction of the furnace is simplified because in the rotary hearth furnace only the gap between the outer wall and the turntable has to be sealed to the outside without impairing the functionality.
  • the inner wall extends to the top of the turntable, forming a gap, a sealing element being provided to seal the gap.
  • the inner wall is sealed off from the movable turntable within the furnace space, so that the sealing is relatively simple.
  • the sealing element is advantageously designed as a fiber mat.
  • sealing element is designed as a sealing support or receptacle for the end face of the inner wall.
  • the top of the turntable can also have a recess into which the inner wall protrudes to form an annular gap, a seal being arranged in the gap.
  • the inner wall is preferably hollow cylinder or. plug-shaped and made of ceramic or heat-resistant metal.
  • the inner wall is rigidly attached to the ceiling, so that guides for the doors can be attached to the inner wall according to the invention.
  • the inner wall can have external insulation.
  • the end face of the inner wall is advantageously closed.
  • Figure 1 is a schematic longitudinal section of a first embodiment of a rotary hearth furnace.
  • FIG. 2 shows a schematic top view of the rotary hearth furnace according to FIG. 1;
  • Fig. 3 shows a schematic longitudinal section of a second embodiment.
  • a rotary hearth 1 which is designed as a turntable and is provided with a drive 2.
  • An oil cup seal 7 is arranged on the outside below the turntable, by means of which the furnace chamber 5 is sealed gas-tight to the outside.
  • An inner wall 8 in the form of a plug or hollow cylinder made of heat-resistant steel is welded to the ceiling 4.
  • the inner wall 8 extends to the top of the turntable 1, forming a gap 9.
  • the inner wall is closed at the end.
  • a sealing element 10 in the form of a fiber mat is inserted into the gap 9. When the turntable 1 rotates, the upper side thereof grinds along the fiber mat 10.
  • the furnace space 5 is heated in a known manner, not shown.
  • the hanging inner wall 8 enables the furnace space to be subdivided into several treatment zones with the aid of several doors 11.
  • the doors 11 can be raised vertically and can be sunk into shafts 12 in the ceiling 4.
  • Fig. 2 it is shown that there is a closable filling and removal opening 13 in the outer wall 3.
  • the doors 11 are arranged at a circumferential distance from one another and are guided in guides 14 on the inner wall 8 and the outer wall 3.
  • 3 shows a second embodiment of the rotary hearth furnace according to the invention.
  • the inner wall can be composed of several individual annular parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Tunnel Furnaces (AREA)

Abstract

L'invention concerne un four à sole tournante destiné au traitement thermique de pièces et comprenant une sole tournante (1) qui présente un mécanisme d'entraînement en rotation (2). Une paroi interne (8) et une paroi externe (3) délimitent un espace four annulaire (5) qui est subdivisé en au moins deux zones de traitement par au moins une porte verticalement mobile. Selon l'invention, la sole tournante (1) est conçue sous forme de plateau tournant. La paroi interne (8) est fixée au plafond (4) et est suspendue au-dessus du plateau tournant (1). De préférence, la paroi interne (8) s'étend en formant une fente (9) jusqu'à la face supérieure du plateau tournant (1), un élément d'étanchéité (10) permettant d'étanchéifier cette fente. Le four est de construction simple car il ne présente plus qu'une étanchéification de la fente vers l'extérieur. Le four à sole tournante peut être construit avec des diamètres primitifs de référence relativement petits et il permet un traitement thermique dans différentes zones de traitement, ces zones étant séparées par des portes.
PCT/EP2000/009735 1999-10-29 2000-10-05 Fours a sole tournante destines au traitement thermique de pieces WO2001033152A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79144/00A AU7914400A (en) 1999-10-29 2000-10-05 Rotary hearth furnace for heat-treating workpieces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19952397.5 1999-10-29
DE1999152397 DE19952397A1 (de) 1999-10-29 1999-10-29 Drehherdofen zur Wärmebehandlung von Werkstücken

Publications (1)

Publication Number Publication Date
WO2001033152A1 true WO2001033152A1 (fr) 2001-05-10

Family

ID=7927457

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/009735 WO2001033152A1 (fr) 1999-10-29 2000-10-05 Fours a sole tournante destines au traitement thermique de pieces

Country Status (3)

Country Link
AU (1) AU7914400A (fr)
DE (2) DE19952397A1 (fr)
WO (1) WO2001033152A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007038991A1 (de) 2007-08-17 2009-02-19 Daimler Ag Drehherdofen zur Wärmebehandlung von Werkstücken
CN103898311B (zh) * 2012-12-26 2016-05-18 中冶天工集团有限公司 环形加热炉炉底工作层施工方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612496A (en) * 1969-10-17 1971-10-12 Peter N Latuff Oven
US4111644A (en) * 1977-04-19 1978-09-05 Selas Corporation Of America Rotary hearth furnace with preheat conveyor
JPS5644585A (en) * 1979-09-20 1981-04-23 Saamu Giken Kk Inner wall removing rotary furnace
US4681536A (en) * 1984-08-17 1987-07-21 Otto Junker Gmbh Charging sluice for annealing oven
FR2617953A2 (fr) * 1982-04-27 1989-01-13 Innovatique Sa Four a sole tournante pour le traitement thermique, thermochimique ou electrothermique de metaux sous atmosphere rarefiee ou controlee
JPH01260289A (ja) * 1988-04-11 1989-10-17 Murata Mfg Co Ltd バッチ式焼成炉
US5667603A (en) * 1994-09-05 1997-09-16 Ntn Corporation Hardening process and apparatus for holed flat parts

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3007309A1 (de) * 1980-02-27 1981-09-03 Karl-Hans 6940 Weinheim Friedrich Drehringofen zum brennen von keramischen gegenstaenden, insbesondere feingiessformen
JPS58217625A (ja) * 1982-06-09 1983-12-17 Daido Steel Co Ltd 熱処理装置
DE3441338A1 (de) * 1984-11-13 1986-05-15 Ipsen Industries International Gmbh, 4190 Kleve Verfahren zur waermebehandlung metallischer werkstuecke unter verwendung eines durchlauf- oder durchstossofens sowie vorrichtung zum durchfuehren dieses verfahrens
DE3427716C1 (de) * 1984-07-27 1985-11-14 Daimler-Benz Ag, 7000 Stuttgart Drehherdofen in Ringbauart zur Waermebehandlung von Werkstuecken

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612496A (en) * 1969-10-17 1971-10-12 Peter N Latuff Oven
US4111644A (en) * 1977-04-19 1978-09-05 Selas Corporation Of America Rotary hearth furnace with preheat conveyor
JPS5644585A (en) * 1979-09-20 1981-04-23 Saamu Giken Kk Inner wall removing rotary furnace
FR2617953A2 (fr) * 1982-04-27 1989-01-13 Innovatique Sa Four a sole tournante pour le traitement thermique, thermochimique ou electrothermique de metaux sous atmosphere rarefiee ou controlee
US4681536A (en) * 1984-08-17 1987-07-21 Otto Junker Gmbh Charging sluice for annealing oven
JPH01260289A (ja) * 1988-04-11 1989-10-17 Murata Mfg Co Ltd バッチ式焼成炉
US5667603A (en) * 1994-09-05 1997-09-16 Ntn Corporation Hardening process and apparatus for holed flat parts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 019 (M - 919) 16 January 1990 (1990-01-16) *

Also Published As

Publication number Publication date
DE19952397A1 (de) 2001-05-03
DE20022258U1 (de) 2001-07-26
AU7914400A (en) 2001-05-14

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