EP0389889B1 - Dispositif pour la répartition des courants gazeux dans un four à vide - Google Patents

Dispositif pour la répartition des courants gazeux dans un four à vide Download PDF

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Publication number
EP0389889B1
EP0389889B1 EP90104992A EP90104992A EP0389889B1 EP 0389889 B1 EP0389889 B1 EP 0389889B1 EP 90104992 A EP90104992 A EP 90104992A EP 90104992 A EP90104992 A EP 90104992A EP 0389889 B1 EP0389889 B1 EP 0389889B1
Authority
EP
European Patent Office
Prior art keywords
fan
batch
gas
space
furnace
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
EP90104992A
Other languages
German (de)
English (en)
Other versions
EP0389889A1 (fr
Inventor
Karlheinz Neubecker
Cordt Rohde
Gerhard Welzig
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.)
Evonik Operations GmbH
Original Assignee
Degussa 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 Degussa GmbH filed Critical Degussa GmbH
Publication of EP0389889A1 publication Critical patent/EP0389889A1/fr
Application granted granted Critical
Publication of EP0389889B1 publication Critical patent/EP0389889B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2005/062—Cooling elements
    • F27B2005/064—Cooling elements disposed in the furnace, around the chamber, e.g. coils
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/14—Arrangements of heating devices
    • F27B2005/143—Heating rods disposed in the chamber
    • F27B2005/146—Heating rods disposed in the chamber the heating rods being in the tubes which conduct the heating gases
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/161—Gas inflow or outflow
    • F27B2005/164—Air supply through a set of tubes with openings
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/166—Means to circulate the atmosphere
    • F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine

Definitions

  • the invention relates to a device for controlling gas flows in vacuum furnaces, in which the batches are both heated and quenched up to temperatures of approximately 750 ° C. in a batch space with gas circulation by means of a fan.
  • Such furnaces usually consist of a cylindrical pressure housing in which there is a heated batch space surrounded by thermal insulation, a heat exchanger and a fan for circulating the heating and cooling gas. It is advantageous both during the operating phase in which the batch is convectively heated and during the quenching phase, the gas through heating conductors in the form of tubes which are arranged axially on the lateral surface of the cylindrical batch space and are provided with nozzles directed towards the batch, to lead into the batch room. It is also advantageous to circulate the gas in both operating phases with the same fan.
  • Such an oven is described in DE-PS 37 36 502.
  • a control device In order to ensure that the batch can be both heated and quenched with the same gas, a control device must be present in the furnace be, which allows the gas flow circulated by the fan to be reversed between two circuits, so that in one case the gas only circulates within the heated furnace area provided with thermal insulation, and in the other case via the heat exchanger tubes arranged between the thermal insulation and the recipient wall.
  • This construction has the disadvantage that only openings with a small cross-section can be sealed by the slide, so that when they flow through, high pressure losses occur in the gas flow. Furthermore, the inflow to the fan is asymmetrical, which results in an uneven distribution of the gas flow on the heating pipes. Another disadvantage is that the travel of the slide between the two end positions is very large. For actuation a very long cylinder is required, which protrudes far from the furnace housing and limits the installation options of such a furnace.
  • the inflow of the gas must be completely radially symmetrical, only slight flow losses may occur and the actuation paths must be small.
  • This object is achieved in that two concentric, mutually displaceable cylinders are arranged between the batch space and fan in the furnace center axis, of which the outer cylinder is firmly connected to the batch space and the inner cylinder via a linkage axially between a baffle plate attached in the batch space and the Fan suction opening can be moved.
  • Figures 1 to 4 schematically show an exemplary embodiment of the control device according to the invention, with Figures 1 and 2 showing the control device in the two end positions in a vacuum oven according to DE-PS 37 36 502 and Figures 3 and 4 showing these end positions in enlargements.
  • the furnace consists of a recipient (11) in which a batch space (13) is arranged within a thermal insulation (12), which is heated via heating pipes (14) and simultaneously supplied with gas.
  • the heat exchanger (15) is located between the recipient (11) and the thermal insulation (12).
  • the control device consists of two concentric cylinders, of which the outer (1) is firmly connected to the wall (2) of the batch space (13) facing the fan. This serves as a guide for the inner cylinder (3), which is fitted into the outer cylinder (1) with little play.
  • the inner cylinder (3) can be moved by means of a linkage between a baffle plate (5) fastened to the batch chamber wall (2) with stud bolts (4) in the batch space (13) and the wall of a gas distribution device (7) surrounding the fan (6).
  • the actuation is preferably carried out in such a way that an axis (8) is introduced into the recipient transversely to the center axis of the furnace.
  • a shift fork (9) is attached to it, which engages a rod (10) which is inserted across the inner cylinder (3) and is firmly connected to it.
  • a rod (10) which is inserted across the inner cylinder (3) and is firmly connected to it.
  • longitudinal slots are left in the outer stationary cylinder (1).
  • the inner cylinder (3) lies with its second end face on the baffle plate (5) and seals the batch space (13).
  • An annular inflow cross-section to the furnace space outside of the thermal insulation is released at the fan suction opening.
  • the two cylinders (1 and 3) are preferably made of graphite felt, which is coated on all outer surfaces with graphite foil. This material is resistant to the temperatures that occur. Due to the low weight and the low coefficient of friction of the graphite / graphite pairing, the actuation forces are small.
  • the inflow to the fan (6) takes place completely radially symmetrically in both operating phases.
  • the flow losses can be minimized by suitable adjustment of the annular gap height to the intake cross section of the fan (6).
  • the rotation of the axis (8) required for actuation can take place, for example, by means of a compact swivel cylinder which in no way restricts the installation of the furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Drying Of Solid Materials (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Physical Vapour Deposition (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Claims (1)

  1. Dispositif de commande de courants gazeux dans un four sous vide, dans lesquels à l'aide d'un ventilateur on peut aussi bien chauffer que refroidir les charges dans un volume de charge en faisant circuler les gaz à l'aide d'un ventilateur, caractérisé en ce qu'entre la chambre de charges (13) et le ventilateur (6) sur l'axe médian du four se trouvent deux cylindres concentriques (1, 3) pouvant coulisser l'un par rapport à l'autre, dont le cylindre externe (1) est solidaire de la chambre de charge (13) et le cylindre interne (3) peut coulisser axialement à l'aide d'une tige entre une plaque d'impact (5) fixée dans la chambre de charge (13) et l'orifice d'aspiration de ventilateur.
EP90104992A 1989-03-30 1990-03-16 Dispositif pour la répartition des courants gazeux dans un four à vide Expired - Lifetime EP0389889B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910234A DE3910234C1 (fr) 1989-03-30 1989-03-30
DE3910234 1989-03-30

Publications (2)

Publication Number Publication Date
EP0389889A1 EP0389889A1 (fr) 1990-10-03
EP0389889B1 true EP0389889B1 (fr) 1993-02-03

Family

ID=6377430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104992A Expired - Lifetime EP0389889B1 (fr) 1989-03-30 1990-03-16 Dispositif pour la répartition des courants gazeux dans un four à vide

Country Status (20)

Country Link
US (1) US5035611A (fr)
EP (1) EP0389889B1 (fr)
JP (1) JPH02298214A (fr)
CN (1) CN1017182B (fr)
AT (1) ATE85420T1 (fr)
BG (1) BG51162A3 (fr)
BR (1) BR9001374A (fr)
CA (1) CA2013083A1 (fr)
CS (1) CS9001227A3 (fr)
DD (1) DD299673A5 (fr)
DE (2) DE3910234C1 (fr)
DK (1) DK0389889T3 (fr)
ES (1) ES2037490T3 (fr)
HR (1) HRP920580A2 (fr)
HU (1) HU207155B (fr)
PL (1) PL161410B1 (fr)
RO (1) RO105580B1 (fr)
RU (1) RU1836612C (fr)
YU (1) YU47220B (fr)
ZA (1) ZA901722B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034085C1 (fr) * 1990-10-26 1991-11-14 Degussa Ag, 6000 Frankfurt, De
JP2579561B2 (ja) * 1991-03-22 1997-02-05 東海カーボン株式会社 ＳｉＣウイスカーの製造装置
JPH04118443U (ja) * 1991-04-03 1992-10-22 大同特殊鋼株式会社 真空熱処理炉
DE4121277C2 (de) * 1991-06-27 2000-08-03 Ald Vacuum Techn Ag Vorrichtung und Verfahren zur selbsttätigen Überwachung der Betriebssicherheit und zur Steuerung des Prozeßablaufs bei einem Vakuum-Wärmebehandlungsofen
US5267257A (en) * 1991-08-14 1993-11-30 Grier-Jhawar-Mercer, Inc. Vacuum furnace with convection heating and cooling
FR2689225A1 (fr) * 1992-03-25 1993-10-01 Stein Heurtey Physitherm Four pour traitement sous vide ou sous atmosphère gazeuse et pour trempe sous pression.
US5407349A (en) * 1993-01-22 1995-04-18 International Business Machines Corporation Exhaust system for high temperature furnace
ES2235226T3 (es) * 1996-10-22 2005-07-01 Germaine Van Der Veken Dispositivo aerogenerador.
US5827044A (en) * 1997-03-26 1998-10-27 Yazici; Muammer Fan system with variable air volume control
US6349108B1 (en) * 2001-03-08 2002-02-19 Pv/T, Inc. High temperature vacuum furnace
DE202006012913U1 (de) * 2006-08-22 2006-10-19 Ipsen International Gmbh Druckkammer
US20120168143A1 (en) * 2010-12-30 2012-07-05 Poole Ventura, Inc. Thermal Diffusion Chamber With Heat Exchanger
US8950470B2 (en) * 2010-12-30 2015-02-10 Poole Ventura, Inc. Thermal diffusion chamber control device and method
CN103575094A (zh) * 2012-07-27 2014-02-12 苏州工业园区杰士通真空技术有限公司 一种真空炉对流加热装置
WO2014142975A1 (fr) * 2013-03-14 2014-09-18 Poole Ventura, Inc. Chambre de diffusion thermique avec compresseur à convection
CN106017071B (zh) * 2016-05-31 2018-04-10 成都西沃克真空科技有限公司 一种真空炉

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1259919B (de) * 1964-06-12 1968-02-01 Harold Norregard Ipsen Ofen zur Waermebehandlung von Werkstuecken aus Metall
DE1919493C3 (de) * 1969-04-17 1980-05-08 Ipsen Industries International Gmbh, 4190 Kleve Atmosphären-Vakuumofen
BE795779A (fr) * 1972-02-23 1973-08-22 Ugine Infra Four de traitement de charges annulaires
GB1549770A (en) * 1975-09-16 1979-08-08 Anjou M D Fan assemblies for ventilators
DE2839807C2 (de) * 1978-09-13 1986-04-17 Degussa Ag, 6000 Frankfurt Vakuumofen mit Gaskühleinrichtung
DE2844843C2 (de) * 1978-10-14 1985-09-12 Ipsen Industries International Gmbh, 4190 Kleve Industrieofen zur Wärmebehandlung metallischer Werkstücke
US4265592A (en) * 1979-05-09 1981-05-05 Carlini Gerardo P V Centrifugal fan
US4560348A (en) * 1984-05-24 1985-12-24 Abar Ipsen Industries Gas nozzle for a heat treating furnace
US4553404A (en) * 1984-06-20 1985-11-19 Whirlpool Corporation Room air conditioner with high capacity fresh air circulation means
US4643639A (en) * 1984-12-24 1987-02-17 Sundstrand Corporation Adjustable centrifugal pump
US4859140A (en) * 1985-01-25 1989-08-22 Brod & Mcclung - Pace Co. Centrifugal fan
US4596526A (en) * 1985-03-04 1986-06-24 Worthington Industries, Inc. Batch coil annealing furnace and method
US4891008A (en) * 1986-05-21 1990-01-02 Columbia Gas Service System Corporation High temperature convection furnace
US4830610A (en) * 1986-05-21 1989-05-16 Columbia Gas Service System Corporation High temperature convection furnace
FR2614683B1 (fr) * 1987-04-28 1989-06-16 Bmi Fours Ind Four de traitement thermique sous vide a refroidissement par courant de gaz
DE3736502C1 (de) * 1987-10-28 1988-06-09 Degussa Vakuumofen zur Waermebehandlung metallischer Werkstuecke
US4854860A (en) * 1987-12-02 1989-08-08 Gas Research Institute Convective heat transfer within an industrial heat treating furnace
US4906182A (en) * 1988-08-25 1990-03-06 Abar Ipsen Industries, Inc. Gas cooling system for processing furnace

Also Published As

Publication number Publication date
HRP920580A2 (en) 1995-06-30
CA2013083A1 (fr) 1990-09-30
HU207155B (en) 1993-03-01
CN1046218A (zh) 1990-10-17
DK0389889T3 (da) 1993-06-01
YU47220B (sh) 1995-01-31
CS275173B2 (en) 1992-02-19
ZA901722B (en) 1990-12-28
RU1836612C (ru) 1993-08-23
DD299673A5 (de) 1992-04-30
ATE85420T1 (de) 1993-02-15
BG51162A3 (en) 1993-02-15
PL161410B1 (pl) 1993-06-30
DE3910234C1 (fr) 1990-04-12
ES2037490T3 (es) 1993-06-16
US5035611A (en) 1991-07-30
BR9001374A (pt) 1991-04-02
YU57790A (en) 1992-05-28
JPH02298214A (ja) 1990-12-10
DE59000830D1 (de) 1993-03-18
CS9001227A3 (en) 1992-02-19
CN1017182B (zh) 1992-06-24
HU902027D0 (en) 1990-08-28
EP0389889A1 (fr) 1990-10-03
RO105580B1 (ro) 1992-09-25

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