EP1234152A1 - Continuous furnace for tubular firing material - Google Patents

Continuous furnace for tubular firing material

Info

Publication number
EP1234152A1
EP1234152A1 EP00965775A EP00965775A EP1234152A1 EP 1234152 A1 EP1234152 A1 EP 1234152A1 EP 00965775 A EP00965775 A EP 00965775A EP 00965775 A EP00965775 A EP 00965775A EP 1234152 A1 EP1234152 A1 EP 1234152A1
Authority
EP
European Patent Office
Prior art keywords
furnace
transport
section
flow channel
continuous
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.)
Granted
Application number
EP00965775A
Other languages
German (de)
French (fr)
Other versions
EP1234152B1 (en
Inventor
Ralf Fink
Hans-Georg Hartmann
Jörg RIDDER
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.)
Riedhammer GmbH
Riedhammer GmbH and Co KG
Original Assignee
Riedhammer GmbH
Riedhammer GmbH and Co KG
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 Riedhammer GmbH, Riedhammer GmbH and Co KG filed Critical Riedhammer GmbH
Publication of EP1234152A1 publication Critical patent/EP1234152A1/en
Application granted granted Critical
Publication of EP1234152B1 publication Critical patent/EP1234152B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F27B9/20—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
    • F27B9/14—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
    • F27B9/22—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 rails, e.g. under the action of scrapers or pushers
    • F27B9/227—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 rails, e.g. under the action of scrapers or pushers with rotation 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
    • F27B9/24—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
    • F27B9/2461—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 charge being suspended from the conveyor
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D3/123—Furnace cars

Definitions

  • the invention relates to a continuous furnace for tubular fuel, in particular rotationally symmetrical fuel, such as stoneware pipes.
  • the invention is accordingly based on the object of specifying a continuous furnace for tubular items to be fired, which enables the shortest possible passage times through the furnace and largely prevents deformation of the items to be fired.
  • the invention is based on the following consideration:
  • deformations can occur as a result of gravitational influences in the temperature range mentioned. This applies to both standing and hanging transport of the fired goods.
  • the invention is based on the consideration of a “static” transport of the firing material through the furnace, in which the firing material remains in one and the same position on or on a transport device To replace “at least partially rotating” transport, in which the firing material, as it passes through the furnace, is rotated at least in the furnace zone, in which it is susceptible to deformation.
  • the firing material is to be guided horizontally through the furnace channel at a corresponding transport device, a device being provided along the transport path, onto which the firing material runs with a freely accessible section (i.e. outside the support areas m of the transport unit), whereby it is (slightly) detached from the support areas of the transport device and then continues to roll (rotate) on this device through the transport device.
  • the invention relates to its most general - ⁇ -
  • Embodiment a continuous furnace for tubular fuel m two alternative versions.
  • the first embodiment includes the following features:
  • the furnace bottom has at least one opening running continuously in the axial direction of the through-channel
  • At least one transport unit is provided, which extends from a conveyor section below the furnace floor through the opening to a transport section in the flow channel, and
  • the transport section is designed for the horizontal reception of at least one tubular fuel
  • At least one device is arranged below at least one freely accessible section of the firing material, along which the firing material with its freely accessible section initially runs in a rolling manner during transport along the continuous flow and then runs off in a rolling manner.
  • the transport device extends through the furnace floor.
  • the second embodiment differs from the first embodiment in that the transport unit is arranged on the ceiling. Specifically, this embodiment differs from the former embodiment by the following features:
  • the furnace roof has at least one opening that runs continuously in the axial direction of the through-channel,
  • At least one transport unit is provided, which extends from a conveyor section above the furnace ceiling through the opening to a transport section in the flow channel.
  • a two-part transport device can be provided, each part extending through a corresponding opening in the furnace floor or ceiling.
  • the openings can run adjacent (and parallel) to each furnace wall. "Adjacent" means that the tubular firing material, the length of which is usually only slightly smaller than the width of the Through channel should be, the corresponding transport sections may protrude slightly at the end.
  • the part of the firing material projecting beyond the associated transport section can be, for example, an end flange area of a stoneware sewage pipe. In this way it is ensured that the firing material is guided exactly horizontally.
  • both are synchronized so that the firing material can be guided through the flow channel in a defined orientation.
  • the transport units can continue over the ends of the flow channel in order to facilitate a corresponding loading and unloading of fired goods. They can then be returned to the furnace entrance above, next to or below the furnace.
  • the transport sections of the transport unit can consist of a frame which extends in the axial direction of the through-channel and which has at least one horizontally running lower leg on which the firing material can be placed.
  • the transport section can also comprise two support arms for the firing material, which are arranged at a distance from one another perpendicularly to the axial direction of the flow channel.
  • the transport sections can be designed to receive one or more items to be fired, and in the case of several items of firing goods these are arranged next to one another (that is, along a horizontal plane).
  • the conveyor section of the transport unit can have rollers or wheels for guiding along corresponding rails.
  • the transport unit above the furnace ceiling - similar to a suspension railway - can have wheels that are guided on rails.
  • a corresponding drive can take place via a pushing device, a revolving chain or the like.
  • one embodiment provides for the opening to be made gas-tight with respect to the flow channel. This can take place via a corresponding, other-shaped course of the transport unit through the opening and / or seals, a relative gas-tightness generally being sufficient.
  • the device on which the firing material runs and along which the firing material rotates is an essential feature of the continuous furnace.
  • This means can consist of a table which is inclined towards end portions (furnace inlet, furnace outlet) of the continuous duct towards the furnace floor having.
  • the arrangement of the inclined surfaces can be such that the free ends are arranged below the firing material resting on the transport device. In this way it is ensured that the firing material only moves to the first sloping surface (increasing in the direction of transport) when the firing material has already arrived above this inclined surface. This way, a allows the firing material to gently run onto the inclined surface.
  • the firing material As soon as the firing material has run onto the inclined surface, it is transported by the transport unit further in the direction of the furnace exit and, due to the increasing inclined surface, is slightly detached (lifted) from the support areas of the transport unit, so that the fired material now only rests on the inclined surface.
  • the firing material rolls over the slope due to the static friction to the inclined surface, before it correspondingly rolls over the inclined subsequent inclined surface before it comes to rest on the support areas of the transport unit and then with the help of the transport unit to is transported to the furnace exit.
  • the device mentioned in the case of the treatment of ceramic firing material can extend in particular along the furnace part, which has temperatures of, for example, above 800 ° C., that is, along the furnace region, m where the furnace temperature is above the softening temperature of the material to be fired.
  • the device runs centrally between the furnace walls. It is advantageous design the facility as wide as possible in order to provide the largest possible contact surface for the firing material. According to one embodiment, the device should have a width that corresponds to at least half the length of the firing material.
  • At least the part of each transport section protruding into the flow channel can consist of a refractory ceramic material, in particular if the maximum temperatures in the furnace are above the softening temperatures of metallic materials.
  • the device can or must accordingly consist of a refractory ceramic material.
  • the device must then be arranged along the firing zone of the furnace.
  • metallic or high-temperature resistant materials can also be used for the transport unit and the device.
  • the device mentioned can have a horizontal one between the said inclined surfaces
  • Figure 1 a section through a first embodiment of a continuous furnace in the region of its combustion zone.
  • Figure 2 a transport unit for a second embodiment of a continuous furnace.
  • the reference number 10 describes an oven ceiling
  • the reference number 12 a furnace floor
  • the reference numbers 14, 16 corresponding oven walls.
  • furnace channel 18 which extends from a furnace entrance (not shown) to a furnace exit (not shown).
  • Openings 20 are formed in the furnace bottom 12 and extend over the entire length of the furnace bottom 12 in the axial direction of the furnace channel 18.
  • Two transport units 22L, 22R extend through the openings 20. Both are identical and
  • the transport unit 22R comprises two cheeks 24L, 24R arranged at a distance from one another.
  • the section 24U projecting downward over the furnace floor 12 forms a conveying section and is correspondingly formed with wheels which run on associated rails (the rails in turn running in the axial direction of the furnace channel 18).
  • the section 240 projecting upwards from the furnace floor 12 serves as a transport section, the cheeks 24L, 24R being U-shaped at their upper end (in a view perpendicular to the axial direction of the furnace duct) and thus serving for the horizontal reception of a stoneware pipe 26, which accordingly over four contact surfaces (in the area of one cheek 24L, 24R).
  • a table 28 which rests on three columns 28S, runs between the transport units 22L, 22R.
  • the table 28 is designed as follows in the transport direction of the stoneware pipe 26 (and correspondingly in the axial direction of the furnace channel 18): It has a first inclined surface, the deepest end of which lies below the support areas of the stoneware pipe 26 and the highest end of which is at least a few centimeters above these support areas , It
  • the stoneware pipe After the stoneware pipe has been heated 26 m in the heating zone of the furnace, it reaches the burning zone of the furnace in which the table 28 is arranged.
  • the stoneware pipe 26 rolls up onto the first inclined surface of the table 28 and rotates during further transport (through the transport units 22L, 22R), whereby it first loosens from the support areas of the cheeks 24L, 24R and is then returned to it.
  • the stoneware pipe 26 is transported by means of the transport units 22L, 22R over the cooling zone to the furnace exit.
  • Sections 12L, 12M and 12R separated by openings 20 are supported by a metal frame structure 30 from below.
  • the transport unit 32 shown in FIG. 2 consists of two conveyor sections 32L, 32R, which functionally correspond to the conveyor sections 24U according to FIG.
  • rollers 34 are arranged, which run on rails (not shown) above an oven ceiling.
  • the lower sections 38 which functionally correspond to the transport sections 240 according to FIG. 1, protrude into the associated furnace duct. They each consist of a frame construction with a horizontally running lower support 38U, on which four stoneware pipes 26 lie side by side.
  • the transport unit 32 is moved along the furnace channel, the stoneware pipes 26, as described in the exemplary embodiment according to FIG. 1, again running in the area of the firing zone on a table 28 of the type described above or running off it and rotating (around their respective axis) are guided on the table.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

A Conveyor furnace for firing pipe-shaped objects with the following characteristics:1.1.1 a furnace floor,1.1.2 a furnace ceiling,1.1.3 a two lateral furnace walls, which connect the furnace floor with the furnace ceiling, forming a furnace channel,1.2 the furnace floor has at least one opening running in the axial direction of the furnace channel,1.3.1 at least one transport unit that extends from a motor section below the furnace floor through the opening to a transport section in the furnace channel, and1.3.2 which can be driven along the opening,1.4 the transport section is designed to hold, in a horizontal position, at least one pipe-shaped object,1.5 in the furnace channel below at least one part of the object to be fired, which is freely achievable, a device is arranged, onto which the object first rolls up, with its freely achievable part, and then rolls down.

Description

DURCHLAUFOFEN FÜR ROHRFORMIGEN BRENNGUT CONTINUOUS FURNACE FOR TUBULAR COMBUSTION
B e s c h r e i b u n gDescription
Die Erfindung betrifft einen Durchlaufofen für rohrförmiges Brenngut, insbesondere rotationssymmetrisches Brenngut, wie Steinzeugrohre.The invention relates to a continuous furnace for tubular fuel, in particular rotationally symmetrical fuel, such as stoneware pipes.
Aus der Praxis ist es bekannt, Steinzeugrohre stehend in zugehörigen Transporteinheiten durch einen Ofenkanal zu fördern, wobei das Brenngut - wie bei jedem Durchlaufofen - zunächst in einer Aufheizzone erwärmt, anschließend in einer Brennzone gebrannt und schließlich in einer Abkühlzone soweit heruntergekühlt wird, daß es am Ofenausgang entnommen werden kann. Die Brennzeiten betragen bis zu 3 Tage.In practice, it is known to convey stoneware pipes in the associated transport units through a furnace channel, the firing material - as with any continuous furnace - first heated in a heating zone, then fired in a firing zone and finally cooled down in a cooling zone until it is cool Oven exit can be removed. The burning times are up to 3 days.
Beim Brennen von rohrförmigem Brenngut tritt zusätzlich das Problem auf, daß sich das Brenngut aufgrund seiner großen Länge (im Verhältnis zum Durchmesser) leicht verformt, insbesondere im Temperaturbereich oberhalb 800°C, in dem das keramische Material erweicht und sich leicht verformt. - ?When burning tubular firing material, there is also the problem that the firing material deforms slightly due to its great length (in relation to the diameter), in particular in the temperature range above 800 ° C., in which the ceramic material softens and deforms slightly. -?
Der Erfindung liegt entsprechend die Aufgabe zugrunde, einen Durchlaufofen für rohrförmiges Brenngut anzugeben, der möglichst kurze Durchgangszeiten durch den Ofen ermöglicht und eine Deformation des Brenngutes weitestgehend verhindert.The invention is accordingly based on the object of specifying a continuous furnace for tubular items to be fired, which enables the shortest possible passage times through the furnace and largely prevents deformation of the items to be fired.
Zur Lösung dieser Aufgabe liegt der Erfindung folgende Überlegung zugrunde: Beim vertikalen Transport des Brenngutes durch den Ofen kann es schon durch Gravitationseinflüsse im genannten Temperaturbereich zu einer Deformation kommen. Dies gilt sowohl für einen stehenden wie für einen hängenden Transport des Brenngutes . Ein liegender Transport auf einem Ofenwagen, wie er beispielsweise aus der Feinkeramik bekannt ist, kommt nicht in Frage, weil bei der gegebenen Länge des Brenngutes entsprechend breite Ofenwagen eingesetzt werden müßten. Damit wäre es erforderlich, die große Masse dieser Ofenwagen mit aufzuheizen beziehungsweise abzukühlen, was energetisch nicht vertretbar ist. Außerdem besteht die Gefahr, daß zum Beispiel ein ungebranntes Rohr mit Kreisquerschnitt sich zu einem gebrannten Rohr mit ovalem Querschnitt verformt.To achieve this object, the invention is based on the following consideration: When the combustion material is transported vertically through the furnace, deformations can occur as a result of gravitational influences in the temperature range mentioned. This applies to both standing and hanging transport of the fired goods. A horizontal transport on a kiln car, as is known, for example, from fine ceramics, is out of the question, because with the given length of the kiln, correspondingly wide kiln cars would have to be used. This would make it necessary to heat up or cool down the large mass of these kiln cars, which is not energetically justifiable. There is also a risk that, for example, an unfired tube with a circular cross section will deform into a fired tube with an oval cross section.
Insoweit geht die Erfindung von der Überlegung aus, einen „statischen" Transport des Brenngutes durch den Ofen, bei dem das Brenngut an ein und derselben Position auf oder an einer Transporteinrichtung verbleibt, durch einen „zumindest teilweise rotierenden" Transport zu ersetzen, bei dem das Brenngut, wahrend es den Ofen durchlauft, zumindest m der Ofenzone, m der es anfällig gegen Verformung ist, rotierend gefuhrt wird.In this respect, the invention is based on the consideration of a “static” transport of the firing material through the furnace, in which the firing material remains in one and the same position on or on a transport device To replace "at least partially rotating" transport, in which the firing material, as it passes through the furnace, is rotated at least in the furnace zone, in which it is susceptible to deformation.
In einer Weiterbildung dieser Überlegung soll das Brenngut an einer entsprechenden Transporteinrichtung horizontal durch den Ofenkanal gefuhrt werden, wobei entlang des Transportweges eine Einrichtung vorgesehen ist, auf die das Brenngut mit einem frei zugänglichen Abschnitt (also außerhalb der Auflagebereiche m der Transporteinheit) auflauft, wobei es sich (geringfügig) von den Auflagebereichen der Transporteinrichtung lost (abhebt) und im weiteren auf dieser Einrichtung rollend (rotierend) durch die Transporteinrichtung weiter gefuhrt wird.In a development of this consideration, the firing material is to be guided horizontally through the furnace channel at a corresponding transport device, a device being provided along the transport path, onto which the firing material runs with a freely accessible section (i.e. outside the support areas m of the transport unit), whereby it is (slightly) detached from the support areas of the transport device and then continues to roll (rotate) on this device through the transport device.
Damit wird erreicht, daß das Brenngut insbesondere m der Ofenzone, m der es aufgrund einer Mateπalerweichung besonders empfindlich gegen Verformung ist, auf einer mehr oder weniger großen Flache aufliegt und entlang dieser Flache rotierend gefuhrt wird, so daß etwaige Deformationen aufgrund der Rotationsbewegung des Brenngutes unmittelbar anschließend wieder egalisiert werden.This ensures that the material to be fired, in particular m of the furnace zone, m it is particularly sensitive to deformation due to material softening, rests on a more or less large surface and is rotated along this surface, so that any deformations due to the rotational movement of the material to be fired are immediate then be equalized again.
Danach betrifft die Erfindung m ihrer allgemeinsten - Δ -Thereafter, the invention relates to its most general - Δ -
Ausfuhrungsform einen Durchlaufofen für rohrförmiges Brenngut m zwei alternativen Ausfuhrungen. Dabei umfaßt die erste Ausfuhrungsform folgende Merkmale:Embodiment a continuous furnace for tubular fuel m two alternative versions. The first embodiment includes the following features:
- einen Ofenboden,- a furnace floor,
- eine Ofendecke,- an oven ceiling,
- zwei, den Ofenboden mit der Ofendecke unter Ausbildung eines Durchlaufkanals verbindenden Ofenseitenwanαen,two furnace walls connecting the furnace floor to the furnace ceiling to form a flow channel,
- der Ofenboden weist mindestens eine, m Axialrichtung des Durchlaufkanals durchgehend verlaufende Öffnung auf,the furnace bottom has at least one opening running continuously in the axial direction of the through-channel,
- mindestens eine Transporteinheit ist vorgesehen, die sich von einem Forderabschnitt unterhalb des Ofenbodens durch die Öffnung hindurch bis zu einem Transportabschnitt im Durchlaufkanal erstreckt, und- At least one transport unit is provided, which extends from a conveyor section below the furnace floor through the opening to a transport section in the flow channel, and
- entlang der Öffnung verfahrbar ist,- can be moved along the opening,
- der Transportabschnitt ist zur horizontalen Aufnahme mindestens eines rohrformigen Brennguts ausgebilαet,the transport section is designed for the horizontal reception of at least one tubular fuel,
- im Durchlaufkanal ist unterhalb mindestens eines frei zugänglichen Abschnitts des Brenngutes mindestens eine Einrichtung angeordnet, entlang der das Brenngut mit seinem frei zugänglichen Abschnitt beim Transport entlang des Durchlauf anals zunächst rollend auflauft und anschließend rollend ablauft.- In the flow channel, at least one device is arranged below at least one freely accessible section of the firing material, along which the firing material with its freely accessible section initially runs in a rolling manner during transport along the continuous flow and then runs off in a rolling manner.
Bei dieser Ausfuhrungsform erstreckt sich die Transporteinrichtung also durch den Ofenboden. Die zweite Ausfuhrungsform unterscheidet sich von der ersten Ausfuhrungsform dadurch, daß die Transporteinheit deckenseitig angeordnet wird. Konkret unterscheidet sich diese Ausfuhrungsform von der erstgenannten Ausfuhrungsform durch folgende Merkmale:In this embodiment, the transport device extends through the furnace floor. The second embodiment differs from the first embodiment in that the transport unit is arranged on the ceiling. Specifically, this embodiment differs from the former embodiment by the following features:
- anstelle des Ofenbodens weist die Ofendecke mindestens eine, in Axialrichtung des Durchlaufkanals durchgehend verlaufende Öffnung auf,instead of the furnace floor, the furnace roof has at least one opening that runs continuously in the axial direction of the through-channel,
- es ist mindestens eine Transporteinheit vorgesehen, die sich von einem Förderabschnitt oberhalb der Ofendecke durch die Öffnung hindurch bis zu einem Transportabschnitt im Durchlaufkanal erstreckt.- At least one transport unit is provided, which extends from a conveyor section above the furnace ceiling through the opening to a transport section in the flow channel.
Alle anderen Merkmale entsprechen der der ersten Ausfuhrungsform.All other features correspond to those of the first embodiment.
Bei beiden Varianten kann eine zweiteilige Transporteinrichtung vorgesehen werden, wobei sich jeder Teil durch eine korrespondierende Öffnung im Ofenboden beziehungsweise der Ofendecke erstreckt.In both variants, a two-part transport device can be provided, each part extending through a corresponding opening in the furnace floor or ceiling.
Dabei können die Öffnungen benachbart (und parallel) zu jeder Ofenwand verlaufen. „Benachbart" bedeutet dabei, daß das rohrförmige Brenngut, dessen Länge in der Regel nur geringfügig kleiner als die Breite des Durchlaufkanals sein sollte, die entsprechenden Transportabschnitte endseitig geringfügig überragen kann. Dabei kann der den zugehörigen Transportabschnitt überragende Teil des Brenngutes beispielsweise ein endseitiger Flanschbereich eines Steinzeug-Abwasserrohrs sein. Auf diese Weise wird sichergestellt, daß das Brenngut im übrigen exakt horizontal geführt wird.The openings can run adjacent (and parallel) to each furnace wall. "Adjacent" means that the tubular firing material, the length of which is usually only slightly smaller than the width of the Through channel should be, the corresponding transport sections may protrude slightly at the end. The part of the firing material projecting beyond the associated transport section can be, for example, an end flange area of a stoneware sewage pipe. In this way it is ensured that the firing material is guided exactly horizontally.
Es ist selbstverständlich, daß bei einer zweiteiligen Transporteinheit beide synchronisiert sind, damit das Brenngut in definierter Ausrichtung durch den Durchlaufkanal hindurchgeführt werden kann.It goes without saying that in the case of a two-part transport unit, both are synchronized so that the firing material can be guided through the flow channel in a defined orientation.
Die Transporteinheiten können sich über die Enden des Durchlaufkanals hindurch fortsetzen, um eine entsprechende Be- und Entladung mit Brenngut zu erleichtern. Sie können im übrigen anschließend oberhalb, neben oder unterhalb des Ofens wieder zum Ofeneingang zurückgeführt werden.The transport units can continue over the ends of the flow channel in order to facilitate a corresponding loading and unloading of fired goods. They can then be returned to the furnace entrance above, next to or below the furnace.
Die Transportabschnitte der Transporteinheit können aus einem sich in Axialrichtung des Durchlaufkanals erstreckenden Rahmen bestehen, der mindestens einen horizontal verlaufenden unteren Schenkel aufweist, auf den das Brenngut aufgelegt werden kann.The transport sections of the transport unit can consist of a frame which extends in the axial direction of the through-channel and which has at least one horizontally running lower leg on which the firing material can be placed.
Dabei kann der Transportabschnitt auch zwei, senkrecht zur Axialrichtung des Durchlaufkanals im Abstand zueinander angeordnete Auflagearme für das Brenngut umfassen. In this case, the transport section can also comprise two support arms for the firing material, which are arranged at a distance from one another perpendicularly to the axial direction of the flow channel.
Bei zwei Transporteinheiten ergeben sich dann an beiden Enden des rohrförmigen Brenngutes jeweils zwei Auflagearme, insgesamt also vier.In the case of two transport units, there are two support arms at each end of the tubular fuel, for a total of four.
Die Transportabschnitte können zur Aufnahme eines oder mehrerer Brenngutstücke ausgebildet sein, wobei auch im Fall mehrerer Brenngutstücke diese nebeneinander (also entlang einer horizontalen Ebene) angeordnet werden.The transport sections can be designed to receive one or more items to be fired, and in the case of several items of firing goods these are arranged next to one another (that is, along a horizontal plane).
Der Förderabschnitt der Transporteinheit kann Rollen oder Räder zur Führung entlang korrespondierender Schienen aufweisen.The conveyor section of the transport unit can have rollers or wheels for guiding along corresponding rails.
Bei der erstgenannten Ausfuhrungsform, bei der die Transporteinheit durch den Ofenboden verläuft, bietet es sich an, die Transporteinheit an ihrem unteren Ende mit Rädern auszubilden, die auf Schienen laufen, wie dies von konventionellen Ofenwagen bekannt ist.In the first-mentioned embodiment, in which the transport unit runs through the furnace floor, it is advisable to design the transport unit at its lower end with wheels that run on rails, as is known from conventional kiln cars.
Bei der zweiten Ausfuhrungsform kann die Transporteinheit oberhalb der Ofendecke - ähnlich wie bei einer Schwebebahn - Räder aufweisen, die auf Schienen geführt werden. Ein entsprechender Antrieb kann über eine Schubeinrichtung, eine umlaufende Kette oder dergleichen erfolgen. In the second embodiment, the transport unit above the furnace ceiling - similar to a suspension railway - can have wheels that are guided on rails. A corresponding drive can take place via a pushing device, a revolving chain or the like.
Zur Erzielung einer definierten Ofenatmosphare ist es notwendig, einen Austausch des Gases im Durchlauf anal mit der Umgebungsatmosphare soweit wie möglich zu verhindern. Insoweit sieht eine Ausfuhrungsform vor, die Öffnung gasdicht gegenüber dem Durchlaufkanal auszubilden. Dies kann über einen entsprechenden aanderformigen Verlauf der Transporteinheit durch die Öffnung und/oder Dichtungen erfolgen, wobei m der Regel eine relative Gasdichtigkeit genügt.To achieve a defined furnace atmosphere, it is necessary to prevent an exchange of the gas in the flow analogously with the ambient atmosphere as far as possible. In this respect, one embodiment provides for the opening to be made gas-tight with respect to the flow channel. This can take place via a corresponding, other-shaped course of the transport unit through the opening and / or seals, a relative gas-tightness generally being sufficient.
Wie ausgeführt stellt die Einrichtung, auf die das Brenngut auflauft und entlang der das Brenngut rotiert ein wesentliches Merkmal des Durchlaufofens dar. Diese Einrichtung kann aus einem Tisch bestehen, der zu Endabschnitten (Ofeneingang, Ofenausgang) des Durchlauf anals in Richtung auf den Ofenboden geneigte Schragflachen aufweist.As stated, the device on which the firing material runs and along which the firing material rotates is an essential feature of the continuous furnace. This means can consist of a table which is inclined towards end portions (furnace inlet, furnace outlet) of the continuous duct towards the furnace floor having.
Die Anordnung der Schragflachen kann dabei derart sein, daß die freien Enden unterhalb des m der Transporteinrichtung aufliegenden Brenngutes angeordnet sind. Auf diese Weise wird sichergestellt, daß das Brenngut beim Transport durch den Ofen erst dann auf die erste (m Transportrichtung ansteigende) Schragflache auflauft, wenn das Brenngut bereits oberhalb dieser Schragflache angekommen ist. Auf diese Weise wird ein sanftes Auflaufen des Brenngutes auf die Schragflache ermöglicht .The arrangement of the inclined surfaces can be such that the free ends are arranged below the firing material resting on the transport device. In this way it is ensured that the firing material only moves to the first sloping surface (increasing in the direction of transport) when the firing material has already arrived above this inclined surface. This way, a allows the firing material to gently run onto the inclined surface.
Sobald das Brenngut auf die Schragflache aufgelaufen ist wird es durch die Transporteinheit weiter m Richtung Ofenausgang transportiert und aufgrund der ansteigenden Schragflache geringfügig von den Auflagebereichen der Transporteinheit gelost (abgehoben) , so daß das Brenngut nunmehr nur noch auf der Schragflache aufliegt. Wahrend des weiteren Transportes rollt das Brenngut aufgrund der Haftreibung zur Schragflache über diese hinweg bis an die höchste Stelle, bevor es über die mvers geneigte anschließende Schragflache korrespondierend abrollt, bevor es wieder auf den Auflagebereichen der Transporteinheit zur Auflage gelangt und anschließend mit Hilfe der Transporteinheit bis zum Ofenausgang transportiert wird.As soon as the firing material has run onto the inclined surface, it is transported by the transport unit further in the direction of the furnace exit and, due to the increasing inclined surface, is slightly detached (lifted) from the support areas of the transport unit, so that the fired material now only rests on the inclined surface. During further transport, the firing material rolls over the slope due to the static friction to the inclined surface, before it correspondingly rolls over the inclined subsequent inclined surface before it comes to rest on the support areas of the transport unit and then with the help of the transport unit to is transported to the furnace exit.
Wie ausgeführt kann sich die genannte Einrichtung (im Fall der Behandlung von keramischem Brenngut) insbesondere entlang des Ofenteils erstrecken, m dem Temperaturen von beispielsweise über 800°C herrschen, also entlang des Ofenbereiches, m dem die Ofentemperatur oberhalb der Erweichungstemperatur des Brenngutmaterials liegt .As stated, the device mentioned (in the case of the treatment of ceramic firing material) can extend in particular along the furnace part, which has temperatures of, for example, above 800 ° C., that is, along the furnace region, m where the furnace temperature is above the softening temperature of the material to be fired.
Ausgehend von einer Einrichtung mit zwei, jeweils ofenwandseitig angeordneten Transporteinheiten verlauft die Einrichtung mittig zwischen den Ofenwanden. Dabei ist es vorteilhaft, die Einrichtung so breit wie möglich auszubilden, um eine möglichst große Auflagefläche für das Brenngut zur Verfügung zu stellen. Nach einer Ausfuhrungsform soll die Einrichtung eine Breite aufweisen, die mindestens der halben Länge des Brenngutes entspricht.Starting from a device with two transport units, each arranged on the furnace wall side, the device runs centrally between the furnace walls. It is advantageous design the facility as wide as possible in order to provide the largest possible contact surface for the firing material. According to one embodiment, the device should have a width that corresponds to at least half the length of the firing material.
Zumindest der in den Durchlaufkanal ragende Teil jedes Transportabschnittes kann aus einem feuerfesten keramischen Werkstoff bestehen, insbesondere dann, wenn die Maximaltemperaturen im Ofen oberhalb der Erweichungstemperaturen metallischer Werkstoffe liegen.At least the part of each transport section protruding into the flow channel can consist of a refractory ceramic material, in particular if the maximum temperatures in the furnace are above the softening temperatures of metallic materials.
Auch die Einrichtung kann oder muß entsprechend aus einem feuerfesten keramischen Werkstoff bestehen.The device can or must accordingly consist of a refractory ceramic material.
Dies gilt insbesondere dann, wenn keramische Produkte gebrannt werden, die eine Sintertemperatur oberhalb 1.000°C aufweisen. In jedem Fall ist die Einrichtung dann entlang der Brennzone des Ofens anzuordnen.This is particularly true when ceramic products are fired that have a sintering temperature above 1,000 ° C. In any case, the device must then be arranged along the firing zone of the furnace.
In anderen Anwendungsfällen können für die Transporteinheit und die Einrichtung beispielsweise auch metallische oder hochtemperaturbeständige Werkstoffe eingesetzt werden.In other applications, for example, metallic or high-temperature resistant materials can also be used for the transport unit and the device.
Weitere Merkmale der Erfindung ergeben sich aus den Merkmalen der Unteransprüche sowie den sonstigen Anmeldungsunterlagen .Further features of the invention result from the features of the subclaims and the other application documents.
So kann die genannte Einrichtung beispielsweise zwischen den genannten Schrägflächen einen horizontal verlaufenden For example, the device mentioned can have a horizontal one between the said inclined surfaces
Abschnitt aufweisen oder alternierend geneigte Schrägflächen (in Transportrichtung des Brenngutes) umfassen .Have section or alternately inclined inclined surfaces (in the transport direction of the firing material).
Die Erfindung wird nachstehend anhand eines Ausführungsbeispieles näher beschrieben. Dabei zeigen - jeweils in schematisierter Darstellung -The invention is described below with reference to an embodiment. Here show - each in a schematic representation -
Figur 1: einen Schnitt durch eine erste Ausfuhrungsform eines Durchlaufofens im Bereich seiner Brennzone .Figure 1: a section through a first embodiment of a continuous furnace in the region of its combustion zone.
Figur 2 : eine Transporteinheit für eine zweite Ausfuhrungsform eines Durchlaufofens .Figure 2: a transport unit for a second embodiment of a continuous furnace.
In Figur 1 beschreibt das Bezugszeichen 10 eine Ofendecke, das Bezugszeichen 12 einen Ofenboden und die Bezugszeichen 14, 16 korrespondierende Ofenwände.In FIG. 1, the reference number 10 describes an oven ceiling, the reference number 12 a furnace floor and the reference numbers 14, 16 corresponding oven walls.
Diese umschließen entsprechend einen Ofenkanal 18, der sich von einem Ofeneingang (nicht dargestellt) zu einem Ofenausgang (nicht dargestellt) erstreckt.These correspondingly enclose a furnace channel 18, which extends from a furnace entrance (not shown) to a furnace exit (not shown).
Im Ofenboden 12 sind vier, gestrichelt dargestellte Öffnungen 20 ausgebildet, die sich über die gesamte Länge des Ofenbodens 12 in Axialrichtung des Ofenkanals 18 erstrecken. Durch die Öffnungen 20 erstrecken sich zwei Transporteinheiten 22L, 22R. Beide sind baugleich und Four openings 20, shown in broken lines, are formed in the furnace bottom 12 and extend over the entire length of the furnace bottom 12 in the axial direction of the furnace channel 18. Two transport units 22L, 22R extend through the openings 20. Both are identical and
werden nachstehend anhand der Transporteinheit 22R näher beschrieben. Die Transporteinheit 22R umfaßt zwei, im Abstand zueinander angeordnete Wangen 24L, 24R. Der nach unten über den Ofenboden 12 vorstehende Abschnitt 24U bildet einen Förderabschnitt und ist entsprechend mit Rädern ausgebildet, die auf zugehörigen Schienen laufen (wobei die Schienen wiederum in Axialrichtung des Ofenkanals 18 verlaufen) .will be described below with reference to the transport unit 22R. The transport unit 22R comprises two cheeks 24L, 24R arranged at a distance from one another. The section 24U projecting downward over the furnace floor 12 forms a conveying section and is correspondingly formed with wheels which run on associated rails (the rails in turn running in the axial direction of the furnace channel 18).
Der den Ofenboden 12 nach oben überragende Abschnitt 240 dient als Transportabschnitt, wobei die Wangen 24L, 24R an ihrem oberen Ende U-förmig (in einer Ansicht senkrecht zur Axialrichtung des Ofenkanals) ausgebildet sind und so der horizontalen Aufnahme eines Steinzeugrohrs 26 dienen, welches entsprechend über vier Auflageflächen (im Bereich je einer Wange 24L, 24R geführt wird) .The section 240 projecting upwards from the furnace floor 12 serves as a transport section, the cheeks 24L, 24R being U-shaped at their upper end (in a view perpendicular to the axial direction of the furnace duct) and thus serving for the horizontal reception of a stoneware pipe 26, which accordingly over four contact surfaces (in the area of one cheek 24L, 24R).
Zwischen den Transporteinheiten 22L, 22R verläuft ein Tisch 28, der auf drei Säulen 28S aufliegt.A table 28, which rests on three columns 28S, runs between the transport units 22L, 22R.
Der Tisch 28 ist, in Transportrichtung des Steinzeugrohrs 26 (und entsprechend in Axialrichtung des Ofenkanals 18) wie folgt gestaltet: Er besitzt eine erste Schrägfläche, deren tiefstes Ende unterhalb der Auflagebereiche des Steinzeugrohrs 26 liegt und deren höchstes Ende zumindest einige Zentimeter über diesen Auflagenbereichen liegt. Es The table 28 is designed as follows in the transport direction of the stoneware pipe 26 (and correspondingly in the axial direction of the furnace channel 18): It has a first inclined surface, the deepest end of which lies below the support areas of the stoneware pipe 26 and the highest end of which is at least a few centimeters above these support areas , It
schließt sich eine weitere Schragflache (spiegelbildlich zur erstgenannten) an, die entsprechend m Transportrichtung des Steinzeugrohrs 26 abfallt.is followed by a further inclined surface (mirror image of the former), which drops in accordance with the transport direction of the stoneware pipe 26.
Nachdem das Steinzeugrohr 26 m der Aufheizzone des Ofens aufgeheizt wurde erreicht es die Brennzone des Ofens, in der der Tisch 28 angeordnet ist. Dabei rollt das Steinzeugrohr 26 auf die erste Schragflache des Tisches 28 auf und dreht sich beim weiteren Transport (durch die Transporteinheiten 22L, 22R) , wobei es sich zunächst von den Auflagebereichen der Wangen 24L, 24R lost und anschließend wieder auf diese zurückgeführt wird.After the stoneware pipe has been heated 26 m in the heating zone of the furnace, it reaches the burning zone of the furnace in which the table 28 is arranged. The stoneware pipe 26 rolls up onto the first inclined surface of the table 28 and rotates during further transport (through the transport units 22L, 22R), whereby it first loosens from the support areas of the cheeks 24L, 24R and is then returned to it.
Danach wird das Steinzeugrohr 26 mit Hilfe der Transporteinheiten 22L, 22R über die Kuhlzone zum Ofenausgang transportiert.Then the stoneware pipe 26 is transported by means of the transport units 22L, 22R over the cooling zone to the furnace exit.
Durch die Offnungen 20 getrennte Abschnitte 12L, 12M und 12R werden durch eine Metalirahmenkonstruktion 30 von unten abgestutzt.Sections 12L, 12M and 12R separated by openings 20 are supported by a metal frame structure 30 from below.
Die m Figur 2 dargestellte Transporteinheit 32 besteht aus zwei Forderabschnitten 32L, 32R, die den Forderabschnitten 24U gemäß Figur 1 funktional entsprechen. The transport unit 32 shown in FIG. 2 consists of two conveyor sections 32L, 32R, which functionally correspond to the conveyor sections 24U according to FIG.
An diesen Forderabschnitten sind Rollen 34 angeordnet, die auf (nicht dargestellten) Schienen oberhalb einer Ofendecke verlaufen.At these conveying sections, rollers 34 are arranged, which run on rails (not shown) above an oven ceiling.
Wahrend sich die mit 36 gekennzeichneten Abschnitte durch korrespondierende Offnungen der Ofendecke erstrecken ragen die unteren Abschnitte 38, die den Transportabschnitten 240 gemäß Figur 1 funktional entsprechen, m den zugehörigen Ofenkanal hinein. Sie bestehen jeweils aus einer Rahmenkonstruktion mit einem horizontal verlaufenden unteren Auflager 38U, auf dem vier Steinzeugrohre 26 nebeneinander aufliegen.While the sections marked with 36 extend through corresponding openings in the furnace ceiling, the lower sections 38, which functionally correspond to the transport sections 240 according to FIG. 1, protrude into the associated furnace duct. They each consist of a frame construction with a horizontally running lower support 38U, on which four stoneware pipes 26 lie side by side.
Mit Hilfe der Rollen 34 wird die Transporteinheit 32 entlang des Ofenkanals bewegt, wobei die Steinzeugrohre 26, wie am Ausfuhrungsbeispiel nach Figur 1 beschrieben, wiederum im Bereich der Brennzone auf einen Tisch 28 der vorstehend beschriebenen Art auflaufen beziehungsweise von diesem ablaufen und dabei rotierend (um ihre jeweilige Achse) auf dem Tisch gefuhrt werden. With the help of the rollers 34, the transport unit 32 is moved along the furnace channel, the stoneware pipes 26, as described in the exemplary embodiment according to FIG. 1, again running in the area of the firing zone on a table 28 of the type described above or running off it and rotating (around their respective axis) are guided on the table.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Durchlaufofen für rohrförmiges Brenngut (26) mit folgenden Merkmalen:1. Continuous furnace for tubular firing material (26) with the following features:
1.1.1 einem Ofenboden (12),1.1.1 a furnace floor (12),
1.1.2 einer Ofendecke (10),1.1.2 a furnace ceiling (10),
1.1.3 zwei, den Ofenboden (12) mit der Ofendecke (10) unter Ausbildung eines Durchlaufkanals (18) verbindenden Ofenseitenwänden (14, 16),1.1.3 two furnace side walls (14, 16) connecting the furnace floor (12) to the furnace ceiling (10) to form a flow channel (18),
1.2 der Ofenboden (12) weist mindestens eine, in Axialrichtung des Durchlaufkanals (18) durchgehend verlaufende Öffnung (20) auf,1.2 the furnace bottom (12) has at least one opening (20) running continuously in the axial direction of the flow channel (18),
1.3.1 mindestens einer Transporteinheit (22L, 22R) , die sich von einem Förderabschnitt (24U) unterhalb des Ofenbodens (12) durch die Öffnung (20) hindurch bis zu einem Transportabschnitt (240) im Durchlaufkanal (18) erstreckt, und 1.3.1 at least one transport unit (22L, 22R), which extends from a conveyor section (24U) below the furnace floor (12) through the opening (20) to a transport section (240) in the flow channel (18), and
1.3.2 entlang der Öffnung (20) verfahrbar ist,1.3.2 can be moved along the opening (20),
1.4 der Transportabschnitt (240) ist zur horizontalen Aufnahme mindestens eines rohrförmigen Brennguts (26) ausgebildet,1.4 the transport section (240) is designed for the horizontal reception of at least one tubular fuel (26),
1.5 im Durchlaufkanal (18) ist unterhalb mindestens eines frei zugänglichen Abschnitts des Brennguts (26) mindestens eine Einrichtung (28) angeordnet, entlang der das Brenngut (26) mit seinem frei zugänglichen Abschnitt beim Transport entlang des Durchlaufkanals (18) zunächst rollend aufläuft und anschließend rollend abläuft.1.5 in the flow channel (18), at least one device (28) is arranged below at least one freely accessible section of the firing material (26), along which the firing material (26) with its freely accessible section initially rolls up during transport along the flow channel (18) and then runs on a rolling basis.
2. Durchlaufofen für rohrförmiges Brenngut (26), mit folgenden Merkmalen:2. Continuous furnace for tubular firing material (26), with the following features:
2.1.1 einem Ofenboden (12),2.1.1 a furnace floor (12),
2.1.2 einer Ofendecke (10),2.1.2 an oven ceiling (10),
2.1.3 zwei, den Ofenboden (12) mit der Ofendecke (10) unter Ausbildung eines Durchlaufkanals (18) verbindenden Ofenseitenwänden (14, 16),2.1.3 two furnace side walls (14, 16) connecting the furnace floor (12) to the furnace ceiling (10) to form a flow channel (18),
2.2 die Ofendecke (10) weist mindestens eine, in Axialrichtung des Durchlaufkanals (18) durchgehend verlaufende Öffnung auf, 2.2 the furnace ceiling (10) has at least one opening running continuously in the axial direction of the flow channel (18),
2.3.1 mindestens einer Transporteinheit (32), die sich von einem Förderabschnitt (32L, 32R) oberhalb der Ofendecke (18) durch die Öffnung hindurch bis zu einem Transportabschnitt (38) im Durchlaufkanal (18) erstreckt, und2.3.1 at least one transport unit (32), which extends from a conveyor section (32L, 32R) above the furnace ceiling (18) through the opening to a transport section (38) in the flow channel (18), and
2.3.2 entlang der Öffnung (20) verfahrbar ist,2.3.2 can be moved along the opening (20),
2.4 der Transportabschnitt (240) ist zur horizontalen Aufnahme mindestens eines rohrförmigen Brennguts (26) ausgebildet,2.4 the transport section (240) is designed for the horizontal reception of at least one tubular fuel (26),
2.5 im Durchlaufkanal (18) ist unterhalb mindestens eines frei zugänglichen Abschnitts des Brennguts (26) mindestens eine Einrichtung (28) angeordnet, entlang der das Brenngut (26) mit seinem frei zugänglichen Abschnitt beim Transport entlang des Durchlaufkanals (18) zunächst rollend aufläuft und anschließend rollend abläuft.2.5 in the flow channel (18), at least one device (28) is arranged below at least one freely accessible section of the firing material (26), along which the firing material (26) with its freely accessible section initially rolls up during transport along the flow channel (18) and then runs on a rolling basis.
3. Durchlaufofen nach Anspruch 1 oder 2 mit einer zweiteiligen Transporteinheit (22L, 22R; 32), wobei jeder Teil (22L, 22R; 32L, 32R) sich durch eine korrespondierende Öffnung (20) erstreckt.3. Continuous furnace according to claim 1 or 2 with a two-part transport unit (22L, 22R; 32), each part (22L, 22R; 32L, 32R) extending through a corresponding opening (20).
4. Durchlaufofen nach Anspruch 3, wobei die Öffnungen (20) benachbart jeder Ofenwand (14, 16) verlaufen.4. Continuous furnace according to claim 3, wherein the openings (20) run adjacent to each furnace wall (14, 16).
5. Durchlaufofen nach Anspruch 1 oder 2, bei dem der Transportabschnitt (240, 38) der Transporteinheit (22L, 22R; 32) aus einem sich in Axialrichtung des5. Continuous furnace according to claim 1 or 2, wherein the transport section (240, 38) of the transport unit (22L, 22R; 32) from one in the axial direction of the
Durchlauf anals (18) erstreckenden Rahmen mit einem horizontal verlaufenden unteren Schenkel (38U) besteht. - I IPass through on (18) extending frame with a horizontally extending lower leg (38U). - II
6. Durchlaufofen nach Anspruch 1 oder 2, bei dem der Transportabschnitt (38) zur Aufnahme mehrerer Stücke Brenngut (26) nebeneinander ausgebildet ist.6. Continuous furnace according to claim 1 or 2, wherein the transport section (38) for receiving several pieces of firing material (26) is formed side by side.
7. Durchlaufofen nach Anspruch 1 oder 2, bei dem der Förderabschnitt (24U; 32L, 32R) der Transporteinheit (24L, 24R; 32) Rollen oder Räder (34) zur Führung entlang korrespondierender Schienen aufweist.7. Continuous furnace according to claim 1 or 2, wherein the conveyor section (24U; 32L, 32R) of the transport unit (24L, 24R; 32) has rollers or wheels (34) for guiding along corresponding rails.
8. Durchlaufofen nach Anspruch 1 oder 2, bei dem die Öffnung (20) gasdicht gegenüber dem Durchlaufkanal (18) ausgebildet ist.8. Continuous furnace according to claim 1 or 2, wherein the opening (20) is gas-tight with respect to the flow channel (18).
9. Durchlaufofen nach Anspruch 1 oder 2, bei dem die Einrichtung (28) aus einem Tisch besteht, der zu Endabschnitten des Durchlaufkanals (18) in Richtung auf den Ofenboden (12) geneigte Schrägflächen aufweist.9. Continuous furnace according to claim 1 or 2, wherein the device (28) consists of a table having inclined surfaces towards end portions of the continuous channel (18) towards the furnace bottom (12).
10. Durchlaufofen nach Anspruch 9, bei dem die Schrägflächen im Bereich ihrer freien Enden unterhalb des im Transportabschnitt (240, 38) aufliegenden Brennguts (26) angeordnet sind.10. Continuous furnace according to claim 9, in which the inclined surfaces are arranged in the region of their free ends below the fuel (26) lying in the transport section (240, 38).
11. Durchlaufofen nach Anspruch 1 oder 2, bei dem die Einrichtung (28) mittig zwischen den Ofenwänden (14, 16) verläuft.11. Continuous furnace according to claim 1 or 2, wherein the device (28) runs centrally between the furnace walls (14, 16).
12. Durchlaufofen nach Anspruch 1 oder 2, bei dem die Einrichtung (28) eine Breite aufweist, die mindestens der halben Länge des Brenngutes (26) entspricht. 12. Continuous furnace according to claim 1 or 2, wherein the device (28) has a width which corresponds to at least half the length of the material to be burned (26).
13. Durchlaufofen nach Anspruch 1 oder 2, bei dem jeder Transportabschnitt (240, 38) zwei, senkrecht zur Axialrichtung des Durchlaufkanals (18) im Abstand zueinander angeordnete Auflagebereiche (38U) für das Brenngut (26) umfaßt.13. Continuous furnace according to claim 1 or 2, wherein each transport section (240, 38) comprises two, perpendicular to the axial direction of the flow channel (18) spaced apart support areas (38U) for the kiln (26).
14. Durchlaufofen nach Anspruch 1 oder 2, bei dem zumindest der in den Durchlauf anal (18) ragende Abschnitt jeder Transporteinheit (22L, 22R; 32) aus einem feuerfesten keramischen Werkstoff besteht.14. Continuous furnace according to claim 1 or 2, wherein at least the section of each transport unit (22L, 22R; 32) projecting into the continuous anal (18) consists of a refractory ceramic material.
15. Durchlaufofen nach Anspruch 1 oder 2, bei dem die Einrichtung (28) aus einem feuerfesten keramischen Werkstoff besteht.15. Continuous furnace according to claim 1 or 2, wherein the device (28) consists of a refractory ceramic material.
16. Durchlaufofen nach Anspruch 1 oder 2, bei dem die Einrichtung (28) entlang einer Brennzone des Durchlaufofens angeordnet ist. 16. Continuous furnace according to claim 1 or 2, wherein the device (28) is arranged along a burning zone of the continuous furnace.
EP00965775A 1999-11-29 2000-08-16 Continuous furnace for tubular firing material Expired - Lifetime EP1234152B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19957500 1999-11-29
DE19957500A DE19957500C2 (en) 1999-11-29 1999-11-29 Continuous furnace
PCT/DE2000/002810 WO2001040729A1 (en) 1999-11-29 2000-08-16 Continuous furnace for tubular firing material

Publications (2)

Publication Number Publication Date
EP1234152A1 true EP1234152A1 (en) 2002-08-28
EP1234152B1 EP1234152B1 (en) 2003-07-09

Family

ID=7930791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00965775A Expired - Lifetime EP1234152B1 (en) 1999-11-29 2000-08-16 Continuous furnace for tubular firing material

Country Status (6)

Country Link
US (1) US6672866B1 (en)
EP (1) EP1234152B1 (en)
AT (1) ATE244862T1 (en)
AU (1) AU7642300A (en)
DE (2) DE19957500C2 (en)
WO (1) WO2001040729A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10051217C2 (en) * 2000-10-16 2002-10-10 Eisenmann Kg Maschbau Conveyor system for the rolling transport of at least some circular cylindrical workpieces

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT289632B (en) 1968-04-25 1971-04-26 Arloffer Thonwerke Gmbh Device in tunnel kilns for drying and burning stoneware pipes
US3749550A (en) * 1971-12-16 1973-07-31 Loftus Engineering Corp Walking beam furnace
IT992325B (en) * 1973-08-08 1975-09-10 Italimpianti PROCEDURE AND DEVICE FOR THE ACCELERATED HEATING OF BILLETS AND SIMILARS IN SIDE FURNACES
DE2346909A1 (en) * 1973-09-18 1975-03-27 Werner Herdieckerhoff Gluehtop Pusher furnace for heat treating workpieces - has overhead runway shielded from direct heat and continuous through all sections
JPS5154813A (en) * 1974-11-08 1976-05-14 Chugai Ro Kogyo Kaisha Ltd Marukohenkanetsuro
GB2021743B (en) 1978-05-26 1982-06-09 Hepworth Iron Co Ltd Method and apparatus for firing ceramic products
DE2963878D1 (en) * 1978-05-26 1982-11-25 Hepworth Iron Co Ltd Method and apparatus for firing ceramic products
GB2149074A (en) 1983-11-04 1985-06-05 Consultant Gas Eng Ltd Tunnel kilns
DE3421365C1 (en) 1984-06-08 1985-05-02 Ingenierbüro Schröder GmbH, 5410 Höhr-Grenzhausen Tunnel kiln
DE3519612A1 (en) 1985-05-31 1986-12-04 Hutschenreuther Ag, 8672 Selb DEVICE FOR BURNING CERAMIC MOLDED PARTS, IN PARTICULAR PORCELAIN PLATEWARE
GB9601483D0 (en) 1996-01-25 1996-03-27 Groom Bryan Ltd Kiln assembly
DE19617717A1 (en) * 1996-05-03 1997-11-06 Christian Roffler Process for continuously burning ceramic pipes and furnace for carrying out this process
DE19725162A1 (en) 1997-06-13 1998-12-17 Ver Steinzeugwerke Gmbh Horizontal firing especially of stoneware pipes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0140729A1 *

Also Published As

Publication number Publication date
DE19957500C2 (en) 2003-02-20
US6672866B1 (en) 2004-01-06
DE19957500A1 (en) 2001-06-13
DE50002868D1 (en) 2003-08-14
EP1234152B1 (en) 2003-07-09
ATE244862T1 (en) 2003-07-15
WO2001040729A1 (en) 2001-06-07
AU7642300A (en) 2001-06-12

Similar Documents

Publication Publication Date Title
DE102006020781B3 (en) oven
DE60133520T2 (en) Continuous sintering furnace and use thereof
DE69105297T2 (en) Oven for heating glass panes.
DE19651408C2 (en) Workpiece carrier for heat treatment of workpieces and use of the workpiece carrier
DE2840283C2 (en) Tunnel furnace with a roller hearth for firing ceramic or refractory materials
DE2831251C2 (en) Lifting plate furnace
DD284663A5 (en) METHOD AND DEVICE FOR THE SIMULTANEOUS PREPARATION AND HARDENING OF GLASS PLATES
EP1234152B1 (en) Continuous furnace for tubular firing material
EP0093877B1 (en) Device for the high-temperature heat treatment of articles
DE1596624C3 (en) Device for conveying glass sheets along a gas cushion
DE3915718C1 (en)
EP0745210B1 (en) Structure for a firing bench
DE102015101356A1 (en) Grate bar with coolant channel
DE4411412C1 (en) Device for loading and unloading a firing table assembly with firing material
EP0618418B1 (en) Process to dry and fire tiles and means for its realisation
DE3515856C1 (en) Tunnel-shaped industrial furnace
DE19725162A1 (en) Horizontal firing especially of stoneware pipes
DE69118547T2 (en) MOVABLE FRAME OVEN FOR BURNING PRODUCED ITEMS
DE2610978C2 (en) Furnace lining
DE3443112C1 (en) Industrial furnace for heat treatment of continuous workpieces
DE19639531C1 (en) Loading and unloading device for a firing rack
DE4203595A1 (en) Support for slabs, billets and blocks during oven heat treatment - eliminates cool spots and enhances product quality
DE3931301A1 (en) Tunnel furnace - has channel slits in the base for chain mounted pedestals to range through and carry the workpieces for firing
DE10051217A1 (en) Kiln conveyor for ceramic pipes comprises spaced tracks with paired track-parallel vee-opened drivers plus interposed rocker stations and downstream recess for pipe re-alignment in kiln.
DE1935921A1 (en) Roller hearth furnace with trolley moun- - ted rollers resting on rails on side of fur-

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020523

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030709

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030709

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50002868

Country of ref document: DE

Date of ref document: 20030814

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030816

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030816

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030819

Year of fee payment: 4

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20030822

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20030827

Year of fee payment: 4

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: HANS RUDOLF GACHNANG PATENTANWALT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030916

Year of fee payment: 4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031009

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031009

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031009

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031020

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031209

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20030709

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040816

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

BERE Be: lapsed

Owner name: *RIEDHAMMER G.M.B.H.

Effective date: 20040831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050301

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050301

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040816

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050429

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050816

BERE Be: lapsed

Owner name: *RIEDHAMMER G.M.B.H.

Effective date: 20040831