WO2009153026A1 - Pivot portal for a furnace - Google Patents

Pivot portal for a furnace Download PDF

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Publication number
WO2009153026A1
WO2009153026A1 PCT/EP2009/004338 EP2009004338W WO2009153026A1 WO 2009153026 A1 WO2009153026 A1 WO 2009153026A1 EP 2009004338 W EP2009004338 W EP 2009004338W WO 2009153026 A1 WO2009153026 A1 WO 2009153026A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
support tube
support
cantilever
annular sector
Prior art date
Application number
PCT/EP2009/004338
Other languages
German (de)
French (fr)
Other versions
WO2009153026A9 (en
Inventor
Gerhard Fuchs
Joachim Ehle
Original Assignee
Fuchs Technology Holding Ag
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 Fuchs Technology Holding Ag filed Critical Fuchs Technology Holding Ag
Priority to EP09765606A priority Critical patent/EP2291596A1/en
Publication of WO2009153026A1 publication Critical patent/WO2009153026A1/en
Publication of WO2009153026A9 publication Critical patent/WO2009153026A9/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1808—Removable covers
    • F27D1/1816—Removable covers specially adapted for arc furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
    • F16C32/0685—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for radial load only
    • F16C32/0688—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for radial load only with floating bearing elements
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • F27D11/10—Disposition of electrodes

Definitions

  • the invention relates to a device for pivoting the lid and / or electrodes of a furnace by means of a cantilever.
  • EP-Al-O 056 224 or EP-Al-O 077 319 a device of this type has become known.
  • This document describes an electric furnace with a furnace lid actuated hoist, which has a rigidly connected to a foundation hollow support pin which surrounds a hollow lifting column peripherally.
  • the support pin lifting device preferably a double-acting hydraulic cylinder which is articulated on one hand hingedly connected to the lifting column at its upper end face plate and on the other hand with the foundation, the supporting means of a cantilever cantilever carrying lifting column can be raised and lowered , Further, it can be rotated for pivoting the cover structure relative to the support pin.
  • the lifting column is guided by means of an upper and a lower bearing on the support pin.
  • the bearings are designed as annular bearing bushes, preferably as bronze plain bearing bushes and fastened to the lifting column.
  • the upper ring bearing is based on the causes caused by the lid suspension moments on the side opposite to the cantilever and the lower ring bearing on the side where the cantilever is located on sliding surfaces on the support column from.
  • the applied compressive forces and thus the stress on the bearing can be reduced by increasing the distance between the bearings.
  • the hollow support column, which is fastened to the foundation below the two bearings, is to be dimensioned with regard to the supporting forces acting above its clamping point via the two bearings.
  • the object of the invention is to simplify the storage of the cantilever-bearing support cylinder in a device of the aforementioned type and to reduce the stress on the bearing surfaces.
  • the invention is characterized by the features of claim 1.
  • Advantageous embodiments of the invention can be found in the dependent claims. Since ring-sector-shaped bearing elements are used for the upper and for the lower bearing instead of a ring bearing, which are each arranged symmetrically to the support forces on the support tube, a defined initiation of the supporting forces is formed in the camps with a simplified design of the bearing by easily replaceable bearing elements.
  • the sliding surfaces of these bearing elements, a lubricant is supplied under pressure through at least one bore. This is in the order of 50 to 90% of the pressure caused by the male support force, whereby the friction of the provided on the sliding surfaces with a plastic layer bearing elements can be kept very low.
  • the clamping of the support tube on the foundation is not outside as in the prior art, but between the upper and the lower bearing, preferably in the middle between the two, whereby the load on the support tube and thus its diameter or Wall thickness can be reduced.
  • the erf ⁇ ndungswashe device can be used instead of known turntables of electric arc furnaces for pivoting an electrode framework.
  • a lifting device is fixed in the support tube, through which the support cylinder can be raised and lowered relative to the support tube.
  • a lifting and pivoting device is created, which can be used instead of known lifting and pivoting devices in the steelworks sector, for example as a lifting and pivoting device for a cover portal or an electrode portal.
  • Fig. 1 is a lifting and pivoting device for a carrying a Elektrodentraggerüstenden
  • FIG. 2 shows a substantial part of the lifting and pivoting device of Fig. 1 in a side view
  • FIG. 3 shows the section III-III of Fig. 2
  • Fig. 6 shows the detail VI of Fig. 3 without bearing elements
  • Fig. 7 shows a detail with an inserted bearing element.
  • lifting and pivoting device 1 for pivoting electrodes of an electric arc furnace by means of a cantilever 2 includes a fixed to a foundation 3 support tube 4 and a cantilever 2 supporting support cylinder 5, which is guided by means of an upper bearing 6 and a lower bearing 7 on the support tube 4 slidably.
  • the foundation 3 is the platform of the oven cradle 8 of a tiltable arc furnace.
  • the support for the furnace vessel is designated 9.
  • a support frame 10 is attached, which is in the embodiment, a Elektrodentraggerüst of three juxtaposed support columns 11, 12, 13, in which in known manner lifting columns 14 (there is only one lifting column shown) for electrode support arms 15 are guided by roller bearings 16 ,
  • a pivoting device 17 is provided for pivoting the cantilever 2, a pivoting device 17 is provided and for raising and lowering the cantilever in the support tube 4 accommodated lifting device 18 through which the support arm 5 fixedly connected to the cantilever 2 can be raised and lowered.
  • the pivoting device 17 is shown in more detail in Fig. 4, which illustrates the support frame 10 once in the position shown in FIGS. 1 and 2 in solid lines and once in the pivoted by means of the pivoting device 17 to the side position in dashed lines.
  • the pivot pin 20 is coaxially mounted in the support tube 4 and the rod 21 axially parallel thereto by means of tabs 22 on the support frame 10.
  • this is connected via a joint 23 and a double-acting hydraulic cylinder 29 with an abutment 24 attached to the platform 3.
  • the illustrated in Fig. 1 lifting device 18 for the cantilever 2 is also formed as a hydraulic cylinder 25, which is mounted between a lower pivot bearing 26 and the support tube 4 a top joint bearing 28 fastened to an upper end plate 27 of the support cylinder 5 is clamped in the form of a canopy.
  • the cantilever 2 By actuating the lifting device 18, the cantilever 2 can be raised and lowered and by operating the pivoting device 17, the cantilever arm can be pivoted between two positions, which are shown in FIG. 4 for the support frame 10 firmly connected to the cantilever arm.
  • the support cylinder carrying the cantilever arm is called on the support tube, there called the support column, by an upper and a lower one
  • the upper ring bearing is supported on the opposite side of the cantilever arm on the circumference of the support tube and the lower bearing on the side of the cantilever.
  • the ring bearings are replaced by ring sector bearing members which are mounted on the stressed sides of the bearings, i. the upper bearing 6 opposite to the cantilever 2 and the lower bearing 7 in the direction of the cantilever 2 are arranged on the circumference of the support tube 4.
  • the bearing elements are provided as a plastic bearing with at least one channel through which the sliding surfaces, a lubricant under pressure can be supplied. In addition, the bearing elements are easily replaceable held in brackets.
  • FIG. 3 shows the section HI-III in the upper bearing plane (bearing 6) and FIG. 5 the section VV in the lower bearing plane (bearing 7).
  • three ring sector-shaped bearing elements 30, 31 are for the upper bearing 6 32 provided on the side opposite to the cantilever 2 and the support frame 10 on the circumference of the support tube 4 and shown in FIG. 5 for the lower bearing three ring sector bearing elements 33, 34, 35 on the same side on the circumference of the support tube as the cantilever. 2 Since the exemplary embodiment is a tiltable furnace (opening cradle 8 in FIG.
  • FIG. 6 shows the detail VI of FIG. 3 without the bearing elements and FIG. 7 a detail with a bearing element.
  • a cuboid 40 made of steel, which is fastened to a closure plate 42 by means of a threaded bolt 41 is attached.
  • a bearing plate 43 is mounted, which has a plastic layer as a sliding layer on the side facing the support cylinder 4 side 44.
  • a bore 45 is provided, through which the sliding surface via a line connected to this line a lubricant, preferably oil, can be supplied under pressure.
  • Fig. 6 shows the brackets 46 in the support cylinder 5 (upper bearing 6) and on the support frame 10 (lower bearing 7), in the bearing of FIG. 7 are inserted.
  • holes 47 are provided for screw connections through which the mounting plates 42 are fastened to the edge of the associated brackets 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The invention relates to a device for pivoting the cover and/or electrodes of a melt furnace by means of a cantilever arm (2) that is mounted on a support cylinder (5), wherein the support cylinder (5) is supported in a sliding manner on a support pipe (4) attached to a base (3) by way of an upper and a lower bearing (6, 7), wherein the bearings (6, 7) are formed by means of at least one ring sector-shaped bearing element, the friction surface thereof able to be fed with a lubricant in a pressurized manner.

Description

Drehportal für einen Ofen Rotary portal for a stove
Die Erfindung betrifft eine Vorrichtung zum Verschwenken des Deckels und/oder von Elektroden eines Ofens mittels eines Kragarms.The invention relates to a device for pivoting the lid and / or electrodes of a furnace by means of a cantilever.
Durch die EP-Al-O 056 224 bzw. die EP-Al-O 077 319 ist eine Vorrichtung dieser Art bekannt geworden. Diese Druckschrift beschreibt einen Elektroofen mit einem einen Ofendeckel betätigenden Hubwerk, welches einen mit einem Fundament starr verbundenen hohlen Stützzapfen aufweist, den eine hohl ausgebildete Hubsäule peripher umgibt. Durch eine im Stützzapfen an- geordnete Hubeinrichtung, vorzugsweise einen doppelt wirkenden Hydraulikzylinder, der einerseits gelenkig an einer die Hubsäule an ihrem oberen Ende abschließenden Stirnplatte und andererseits mit dem Fundament gelenkig verbunden ist, kann die mittels eines Kragarms ein Deckeltragwerk tragende Hubsäule angehoben und abgesenkt werden. Ferner kann sie zum Verschwenken des Deckeltragwerks relativ zum Stützzapfen gedreht werden. Die Hubsäule ist mittels eines oberen und eines unteren Lagers am Stützzapfen geführt. Die Lager sind als ringförmige Lagerbüchsen, vorzugsweise als Bronzegleitlagerbüchsen ausgebildet und an der Hubsäule befestigt. Zur einwandfreien Aufnahme der Deckelkräfte und der durch diese Kräfte bewirkten Momente sollen die beiden, die Hubsäule führenden Lager möglichst weit voneinander entfernt liegen. Das obere Ringlager stützt sich aufgrund der durch die Deckelaufhängung bewirkten Momente auf der zum Kragarm entgegengesetzten Seite und das untere Ringlager an der Seite, an der sich der Kragarm befindet, an Gleitflächen auf der Stützsäule ab. Die einwirkenden Druckkräfte und damit die Beanspruchung des Lagers lässt sich durch eine Vergrößerung des Abstandes zwischen den Lagern verringern. Die hohle Stützsäule, welche unterhalb der beiden Lager am Fundament befestigt ist, ist im Hinblick auf die oberhalb ihrer Einspannstelle über die beiden Lager einwir- kenden Stützkräfte zu bemessen.By EP-Al-O 056 224 or EP-Al-O 077 319 a device of this type has become known. This document describes an electric furnace with a furnace lid actuated hoist, which has a rigidly connected to a foundation hollow support pin which surrounds a hollow lifting column peripherally. By means arranged in the support pin lifting device, preferably a double-acting hydraulic cylinder which is articulated on one hand hingedly connected to the lifting column at its upper end face plate and on the other hand with the foundation, the supporting means of a cantilever cantilever carrying lifting column can be raised and lowered , Further, it can be rotated for pivoting the cover structure relative to the support pin. The lifting column is guided by means of an upper and a lower bearing on the support pin. The bearings are designed as annular bearing bushes, preferably as bronze plain bearing bushes and fastened to the lifting column. For proper recording of the cover forces and caused by these forces moments, the two, the lifting column bearing should be as far away from each other. The upper ring bearing is based on the causes caused by the lid suspension moments on the side opposite to the cantilever and the lower ring bearing on the side where the cantilever is located on sliding surfaces on the support column from. The applied compressive forces and thus the stress on the bearing can be reduced by increasing the distance between the bearings. The hollow support column, which is fastened to the foundation below the two bearings, is to be dimensioned with regard to the supporting forces acting above its clamping point via the two bearings.
Aufgabe der Erfindung ist es, bei einer Vorrichtung der einleitend genannten Art die Lagerung des den Kragarm tragenden Tragzylinders zu vereinfachen und die Beanspruchung der Lagerflächen zu reduzieren.The object of the invention is to simplify the storage of the cantilever-bearing support cylinder in a device of the aforementioned type and to reduce the stress on the bearing surfaces.
Die Erfindung ist durch die Merkmale des Anspruchs 1 gekennzeichnet. Vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen. Da für das obere und für das untere Lager anstelle eines Ringlagers ringsektorförmige Lagerelemente verwendet werden, die jeweils symmetrisch zu den Abstützkräften am Stützrohr angeordnet sind, wird in den Lagern eine definierte Einleitung der Stützkräfte bei vereinfachter Ausbildung des Lagers durch einfach auswechselbare Lagerelemente gebildet. Den Gleitflächen dieser Lagerelemente wird durch wenigstens eine Bohrung ein Schmiermittel unter Druck zugeführt. Dieser liegt in der Größenordnung von 50 bis 90 % des durch die aufzunehmenden Stützkraft verursachten Drucks, wodurch die Reibung der an der Gleitflächen mit einer Kunststoffschicht versehenen Lagerelemente sehr gering gehalten werden kann.The invention is characterized by the features of claim 1. Advantageous embodiments of the invention can be found in the dependent claims. Since ring-sector-shaped bearing elements are used for the upper and for the lower bearing instead of a ring bearing, which are each arranged symmetrically to the support forces on the support tube, a defined initiation of the supporting forces is formed in the camps with a simplified design of the bearing by easily replaceable bearing elements. The sliding surfaces of these bearing elements, a lubricant is supplied under pressure through at least one bore. This is in the order of 50 to 90% of the pressure caused by the male support force, whereby the friction of the provided on the sliding surfaces with a plastic layer bearing elements can be kept very low.
Die Einspannung des Stützrohrs am Fundament, welches die Plattform einer Ofenwiege sein kann, liegt nicht wie beim Stand der Technik außerhalb, sondern zwischen dem oberen und dem unteren Lager, vorzugsweise in der Mitte zwischen beiden, wodurch die Belastung des Stützrohrs und damit dessen Durchmesser bzw. Wandstärke verringert werden können.The clamping of the support tube on the foundation, which may be the platform of a furnace cradle, is not outside as in the prior art, but between the upper and the lower bearing, preferably in the middle between the two, whereby the load on the support tube and thus its diameter or Wall thickness can be reduced.
Die erfϊndungsgemäße Vorrichtung ist anstelle bekannter Drehkränze von Lichtbogenöfen zum Verschwenken eines Elektrodengerüsts einsetzbar.The erfϊndungsgemäße device can be used instead of known turntables of electric arc furnaces for pivoting an electrode framework.
Vorzugsweise ist im Stützrohr eine Hub Vorrichtung befestigt, durch die der Tragzylinder relativ zum Stützrohr hebbar und senkbar ist. Hierdurch wird eine Hub- und Schwenkvorrichtung ge- schaffen, die anstelle bekannter Hub- und Schwenkvorrichtungen im Stahlwerksbereich, zum Beispiel als Hub- und Schwenkvorrichtung für ein Deckelportal oder ein Elektrodenportal einsetzbar ist.Preferably, a lifting device is fixed in the support tube, through which the support cylinder can be raised and lowered relative to the support tube. As a result, a lifting and pivoting device is created, which can be used instead of known lifting and pivoting devices in the steelworks sector, for example as a lifting and pivoting device for a cover portal or an electrode portal.
Die Erfindung wird durch ein Ausführungsbeispiel anhand von sieben Figuren erläutert. Es zei- gen:The invention will be explained by an embodiment with reference to seven figures. Show it:
Fig. 1 eine Hub- und Schwenkvorrichtung für einen ein Elektrodentraggerüst tragendenFig. 1 is a lifting and pivoting device for a carrying a Elektrodentraggerüstenden
Kragarm in perspektivischer Darstellung, teilweise geschnitten,Cantilever in perspective, partially cut,
Fig. 2 einen wesentlichen Teil der Hub- und Schwenkvorrichtung von Fig. 1 in einer Seitenansicht,2 shows a substantial part of the lifting and pivoting device of Fig. 1 in a side view,
Fig. 3 den Schnitt III-III von Fig. 2,3 shows the section III-III of Fig. 2,
Fig. 4 den Schnitt IV-IV von Fig. 2,4 shows the section IV-IV of Fig. 2,
Fig. 5 den Schnitt V-V von Fig. 2,5 shows the section V-V of Fig. 2,
Fig. 6 den Ausschnitt VI von Fig. 3 ohne Lagerelemente, und Fig. 7 einen Ausschnitt mit einem eingesetzten Lagerelement.Fig. 6 shows the detail VI of Fig. 3 without bearing elements, and Fig. 7 shows a detail with an inserted bearing element.
Die in den Fig. 1 und 2 in perspektivischer Ansicht bzw. in einer Seitenansicht dargestellte Hub- und Schwenkvorrichtung 1 zum Verschwenken von Elektroden eines Lichtbogenofens mittels eines Kragarms 2 enthält ein an einem Fundament 3 befestigtes Stützrohr 4 und einen den Kragarm 2 tragenden Tragzylinder 5, der mittels eines oberen Lagers 6 und eines unteren Lagers 7 am Stützrohr 4 gleitbar geführt ist. Bei dem Ausführungsbeispiel ist das Fundament 3 die Plattform der Ofenwiege 8 eines kippbaren Lichtbogenofens. Der Träger für das Ofengefäß ist mit 9 bezeichnet. Am Kragarm 2 ist ein Traggerüst 10 befestigt, das bei dem Ausführungsbeispiel ein Elektrodentraggerüst aus drei nebeneinander angeordneten Tragsäulen 11, 12, 13 ist, in denen in bekannter Weise Hubsäulen 14 (es ist nur eine Hubsäule dargestellt) für Elektrodentragarme 15 mittels Rollenlagern 16 geführt sind.1 and 2 in a perspective view and in a side view shown lifting and pivoting device 1 for pivoting electrodes of an electric arc furnace by means of a cantilever 2 includes a fixed to a foundation 3 support tube 4 and a cantilever 2 supporting support cylinder 5, which is guided by means of an upper bearing 6 and a lower bearing 7 on the support tube 4 slidably. In the embodiment, the foundation 3 is the platform of the oven cradle 8 of a tiltable arc furnace. The support for the furnace vessel is designated 9. On the cantilever 2, a support frame 10 is attached, which is in the embodiment, a Elektrodentraggerüst of three juxtaposed support columns 11, 12, 13, in which in known manner lifting columns 14 (there is only one lifting column shown) for electrode support arms 15 are guided by roller bearings 16 ,
Bei dem Ausführungsbeispiel erfolgt die Führung des Tragzylinders 5 am Stützrohr 4 durch das obere Lager 6 direkt und durch das untere Lager 7 mittelbar über das Traggerüst 10, das mit dem Kragarm 2 und mit dem Tragzylinder 5 eine kraftschlüssige Einheit bildet.In the embodiment, the leadership of the support cylinder 5 on the support tube 4 through the upper bearing 6 directly and indirectly through the lower bearing 7 via the support frame 10, which forms a frictional unit with the cantilever 2 and the support cylinder 5.
Zum Verschwenken des Kragarms 2 ist eine Schwenkvorrichtung 17 vorgesehen und zum Anheben und Absenken des Kragarms eine im Stützrohr 4 untergebrachte Hubvorrichtung 18, durch die der mit dem Kragarm 2 fest verbundene Tragzylinder 5 heb- und senkbar ist.For pivoting the cantilever 2, a pivoting device 17 is provided and for raising and lowering the cantilever in the support tube 4 accommodated lifting device 18 through which the support arm 5 fixedly connected to the cantilever 2 can be raised and lowered.
Die Schwenkvorrichtung 17 ist detaillierter in Fig. 4 dargestellt, die das Traggerüst 10 einmal in der den Fig. 1 und 2 dargestellten Position in ausgezogenen Linien und einmal in der mittels der Schwenkvorrichtung 17 zur Seite geschwenkten Position in gestrichelten Linien darstellt. Das Verschwenken des Traggerüsts 10 und des mit diesem fest verbundenen Kragarms 2, der wiederum am Tragzylinder 5 befestigt ist, erfolgt mittels eines Schwenkhebels 19, der an einem Ende auf einem Drehzapfen 20 und am anderen Ende auf einer Stange 21 drehbar gelagert ist. Der Drehzapfen 20 ist koaxial im Stützrohr 4 und die Stange 21 achsparallel hierzu mittels Laschen 22 am Traggerüst 10 befestigt. Zum Verschwenken des Schwenkhebels 19 ist dieser über ein Gelenk 23 und einen doppelt wirkenden Hydraulikzylinder 29 mit einem an der Plattform 3 angebrachten Gegenlager 24 verbunden.The pivoting device 17 is shown in more detail in Fig. 4, which illustrates the support frame 10 once in the position shown in FIGS. 1 and 2 in solid lines and once in the pivoted by means of the pivoting device 17 to the side position in dashed lines. The pivoting of the support frame 10 and the fixed thereto cantilever 2, which in turn is attached to the support cylinder 5, by means of a pivot lever 19 which is rotatably mounted at one end on a pivot pin 20 and at the other end on a rod 21. The pivot pin 20 is coaxially mounted in the support tube 4 and the rod 21 axially parallel thereto by means of tabs 22 on the support frame 10. For pivoting the pivot lever 19, this is connected via a joint 23 and a double-acting hydraulic cylinder 29 with an abutment 24 attached to the platform 3.
Die in Fig. 1 dargestellte Hubvorrichtung 18 für den Kragarm 2 ist ebenfalls als Hydraulikzylinder 25 ausgebildet, der zwischen einem am Stützrohr 4 befestigten unteren Gelenklager 26 und einem an einer oberen Stirnplatte 27 des Tragzylinders 5 befestigten oberen Gelenklager 28 ka- lottenförmig eingespannt ist.The illustrated in Fig. 1 lifting device 18 for the cantilever 2 is also formed as a hydraulic cylinder 25, which is mounted between a lower pivot bearing 26 and the support tube 4 a top joint bearing 28 fastened to an upper end plate 27 of the support cylinder 5 is clamped in the form of a canopy.
Durch Betätigung der Hubvorrichtung 18 lässt sich der Kragarm 2 anheben und absenken und durch Betätigen der Schwenkvorrichtung 17 lässt sich der Kragarm zwischen zwei Positionen verschwenken, die für das mit dem Kragarm fest verbundene Traggerüst 10 in Fig. 4 dargestellt sind.By actuating the lifting device 18, the cantilever 2 can be raised and lowered and by operating the pivoting device 17, the cantilever arm can be pivoted between two positions, which are shown in FIG. 4 for the support frame 10 firmly connected to the cantilever arm.
Wie bereits erwähnt, ist bei der bekannten Hub- und Schwenkvorrichtung der den Kragarm tra- gende Tragzylinder am Stützrohr, dort Stützsäule genannt, durch ein oberes und ein unteresAs already mentioned, in the known lifting and pivoting device, the support cylinder carrying the cantilever arm is called on the support tube, there called the support column, by an upper and a lower one
Ringlager gleitbar geführt. Wegen der über den Kragarm einseitig wirkenden Last stützt sich das obere Ringlager auf der zum Kragarm entgegengesetzten Seite am Umfang des Stützrohrs ab und das untere Lager auf der Seite des Kragarms. Bei der vorliegenden Erfindung sind die Ringlager durch ringsektorförmige Lagerelemente ersetzt, die an den beanspruchten Seiten der Lager, d.h. beim oberen Lager 6 entgegengesetzt zum Kragarm 2 und beim unteren Lager 7 in Richtung des Kragarms 2 am Umfang des Stützrohrs 4 angeordnet sind. Die Lagerelemente sind als Kunststofflager mit wenigstens einem Kanal versehen, durch die den Gleitflächen ein Schmiermittel unter Druck zuführbar ist. Außerdem sind die Lagerelemente einfach auswechselbar in Halterungen gehalten.Slidably guided ring bearing. Because of the cantilever load acting on the cantilever, the upper ring bearing is supported on the opposite side of the cantilever arm on the circumference of the support tube and the lower bearing on the side of the cantilever. In the present invention, the ring bearings are replaced by ring sector bearing members which are mounted on the stressed sides of the bearings, i. the upper bearing 6 opposite to the cantilever 2 and the lower bearing 7 in the direction of the cantilever 2 are arranged on the circumference of the support tube 4. The bearing elements are provided as a plastic bearing with at least one channel through which the sliding surfaces, a lubricant under pressure can be supplied. In addition, the bearing elements are easily replaceable held in brackets.
Fig. 3 stellt den Schnitt HI-III in der oberen Lagerebene (Lager 6) und Fig. 5 den Schnitt V-V in der unteren Lagerebene (Lager 7) dar. Gemäß Fig. 3 sind für das obere Lager 6 drei ringsektorförmige Lagerelemente 30, 31, 32 an der zum Kragarm 2 bzw. zum Traggerüst 10 entgegen gesetzten Seite am Umfang des Stützrohrs 4 vorgesehen und gemäß Fig. 5 für das untere Lager drei ringsektorförmige Lagerelemente 33, 34, 35 auf der selben Seite am Umfang des Stützrohrs wie der Kragarm 2. Da es sich bei dem Ausführungsbeispiel um einen kippbaren Ofen handelt (O- fenwiege 8 in Fig. 1) sind zusätzlich zu den jeweils drei Lagerelementen 30, 31, 32 bzw. 33, 34, 35 weitere ringsektorförmige Lagerelemente 36, 37 bzw. 38, 39 vorgesehen, die, da sie nur beim Kippen belastet werden, einfacher und ohne Druckmittelzufuhr ausgebildet werden können. Bei nicht kippbaren Öfen ist es ausreichend, wenn jeweils am Ort der wirkenden Stützkraft wenigstens ein Lagerelement des anhand der Fig. 6 und 7 beschriebenen Aufbaus an den Stellen vorgesehen wird, an denen sich der Hubzylinder 5 am Stützrohr 6 abstützt. Fig. 6 stellt den Ausschnitt VI von Fig. 3 ohne die Lagerelemente und Fig. 7 einen Ausschnitt mit einem Lagerelement dar. Das in Fig. 7 dargestellte ringsektorförmige Lagerelement 31 enthält einen Quader 40 aus Stahl, der mittels eines Gewindebolzens 41 an einer Verschlussplatte 42 befestigt ist. Auf der zur Verschlussplatte 42 entgegengesetzten Seite ist eine Lagerplatte 43 angebracht, die auf der zum Stützzylinder 4 weisenden Seite 44 eine Kunststoffschicht als Gleitschicht aufweist. In der Lagerplatte 43 ist eine Bohrung 45 vorgesehen, durch die der Gleitfläche über eine an diese Bohrung angeschlossene Leitung ein Schmiermittel, vorzugsweise Öl, unter Druck zuführbar ist.FIG. 3 shows the section HI-III in the upper bearing plane (bearing 6) and FIG. 5 the section VV in the lower bearing plane (bearing 7). According to FIG. 3, three ring sector-shaped bearing elements 30, 31 are for the upper bearing 6 32 provided on the side opposite to the cantilever 2 and the support frame 10 on the circumference of the support tube 4 and shown in FIG. 5 for the lower bearing three ring sector bearing elements 33, 34, 35 on the same side on the circumference of the support tube as the cantilever. 2 Since the exemplary embodiment is a tiltable furnace (opening cradle 8 in FIG. 1), in addition to the respective three bearing elements 30, 31, 32 and 33, 34, 35 further bearing elements 36, 37 and 38 are provided , 39, which, since they are loaded only when tilting, can be formed more easily and without pressure medium supply. For non-tiltable furnaces, it is sufficient if at least one bearing element of the construction described with reference to FIGS. 6 and 7 is provided at the locations at which the lifting cylinder 5 is supported on the support tube 6 respectively at the location of the acting support force. FIG. 6 shows the detail VI of FIG. 3 without the bearing elements and FIG. 7 a detail with a bearing element. The ring-sector-shaped bearing element 31 shown in FIG. 7 contains a cuboid 40 made of steel, which is fastened to a closure plate 42 by means of a threaded bolt 41 is attached. On the opposite side to the closure plate 42, a bearing plate 43 is mounted, which has a plastic layer as a sliding layer on the side facing the support cylinder 4 side 44. In the bearing plate 43, a bore 45 is provided, through which the sliding surface via a line connected to this line a lubricant, preferably oil, can be supplied under pressure.
Fig. 6 zeigt die Halterungen 46 im Tragzylinder 5 (oberes Lager 6) bzw. am Traggerüst 10 (unteres Lager 7), in die Lager gemäß Fig. 7 einschiebbar sind. Am Rand der Befestigungsplatte 42 sind Löcher 47 für Schraub Verbindungen vorgesehen, durch die die Befestigungsplatten 42 am Rand der zugehörigen Halterungen 46 befestigbar sind. Fig. 6 shows the brackets 46 in the support cylinder 5 (upper bearing 6) and on the support frame 10 (lower bearing 7), in the bearing of FIG. 7 are inserted. At the edge of the mounting plate 42 holes 47 are provided for screw connections through which the mounting plates 42 are fastened to the edge of the associated brackets 46.

Claims

Patentansprüche claims
1. Vorrichtung zum Verschwenken des Deckels und/oder von Elektroden eines Ofens mittels eines Kragarms (2), enthaltend ein an einem Fundament (3) befestigtes Stützrohr (4) und einen den Kragarm (2) tragenden1. A device for pivoting the lid and / or electrodes of a furnace by means of a cantilever arm (2), containing a on a foundation (3) fixed support tube (4) and a cantilever (2) bearing
Tragzylinder (5), der mittels eines oberen und eines unteren Lagers (6, 7) am Stützrohr (4) gleitbar geführt ist, ferner enthaltend eine Schwenkvorrichtung (17), durch die der Tragzylinder relativ zum Stützrohr (4) drehbar ist, dadurch gekennzeichnet, dass das obere Lager (6) durch wenigstens ein ringsektorförmiges Lagerelement (30, 31, 32) gebildet ist, das sich auf der zum Kragarm (2) entgegen gesetzten Seite am Umfang des Stützrohres (4) abstützt, das untere Lager (7) durch wenigstens ein ringsektorförmiges Lagerelement (33, 34, 35) gebildet ist, das sich auf der Seite des Kragarms (2) am Umfang des Stützrohres (4) abstützt, und dass den Gleitflächen (44) der genannten ringsektorförmigen Lagerelemente (30, 31, 32 bzw. 33, 34, 35) ein Schmiermittel unter Druck zuführbar ist.A supporting cylinder (5) which is slidably guided by means of an upper and a lower bearing (6, 7) on the support tube (4), further comprising a pivoting device (17) through which the support cylinder is rotatable relative to the support tube (4), characterized in that the upper bearing (6) is formed by at least one annular sector-shaped bearing element (30, 31, 32) which rests on the circumference of the support tube (4) on the side opposite the cantilever (2), the lower bearing (7). is formed by at least one annular sector-shaped bearing element (33, 34, 35), which is supported on the side of the cantilever (2) on the circumference of the support tube (4), and in that the sliding surfaces (44) of said annular sector-shaped bearing elements (30, 31, 32 and 33, 34, 35), a lubricant can be supplied under pressure.
2. Vorrichtung nach Anspruch I5 dadurch gekennzeichnet, dass das Fundament (3) die Plattform der Ofenwiege (8) eines kippbaren Ofens ist.2. Device according to claim I 5 characterized in that the foundation (3) is the platform of the oven cradle (8) of a tiltable furnace.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich die Stelle, an der das Stützrohr (4) am Fundament (3) befestigt ist, zwischen dem oberen und dem unteren Lager (6, 7) befindet.3. Apparatus according to claim 1 or 2, characterized in that the point at which the support tube (4) is fixed to the foundation (3), located between the upper and the lower bearing (6, 7).
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sich die4. Device according to one of claims 1 to 3, characterized in that the
Stelle, an der das Stützrohr (4) am Fundament (3) befestigt ist, in der Mitte zwischen dem oberen und dem unteren Lager (6, 7) befindet.Place where the support tube (4) is fixed to the foundation (3), located in the middle between the upper and the lower bearing (6, 7).
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass im Stütz- röhr (4) eine Hubvorrichtung (18) befestigt ist, durch die der Tragzylinder (5) relativ zum Stützrohr (4) hebbar und senkbar ist. 5. Device according to one of claims 1 to 4, characterized in that in the support tube (4) a lifting device (18) is fixed, through which the support cylinder (5) relative to the support tube (4) can be raised and lowered.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Hubvorrichtung (18) einen Hydraulikzylinder enthält, der zwischen einem am Stützrohr (4) befestigten unteren und einem am Tragzylinder befestigten oberen Gelenklager (26, 27) angeordnet ist.6. The device according to claim 5, characterized in that the lifting device (18) includes a hydraulic cylinder which is arranged between a support tube (4) fixed lower and a support cylinder mounted on the upper pivot bearing (26, 27).
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Kragarm (2) ein Traggerüst (10) trägt.7. Device according to one of claims 1 to 6, characterized in that the cantilever arm (2) carries a support frame (10).
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Traggerüst (10) wenigstens eine Elektrode eines Lichtbogenofens trägt.8. Apparatus according to claim 7, characterized in that the support frame (10) carries at least one electrode of an arc furnace.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Traggerüst (10) einen Ofendeckel trägt.9. Device according to one of claims 1 to 8, characterized in that the supporting frame (10) carries a furnace lid.
10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die sich am Stützrohr (4) abstützenden ringsektorförmigen Lagerelemente (30, 31 , 32) wenigstens des oberen10. Device according to one of claims 1 to 9, characterized in that on the support tube (4) supporting annular sector-shaped bearing elements (30, 31, 32) at least the upper
Lagers (6) in am Tragzylinder (5) angebrachten Halterungen (46) befestigt sind.Bearing (6) are attached to the support cylinder (5) mounted brackets (46).
1 1. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die sich am Stützrohr (4) abstützenden ringsektorförmigen Lagerelemente (33, 34, 35) des unteren Lagers (7) in am Traggerüst (10) angebrachten Halterungen (46) befestigt sind.1 1. Device according to one of claims 1 to 10, characterized in that on the support tube (4) supporting annular sector-shaped bearing elements (33, 34, 35) of the lower bearing (7) in the support frame (10) mounted brackets (46) are attached.
12. Vorrichtung nach Anspruch 10 oder 1 1, dadurch gekennzeichnet, dass die ringsektorförmigen Lagerelemente (30, 31, 32 bzw. 33, 34, 35) durch lösbare Verbindungen in ihren Halterungen (46) befestigt sind.12. The apparatus of claim 10 or 1 1, characterized in that the annular sector-shaped bearing elements (30, 31, 32 and 33, 34, 35) are secured by releasable connections in their holders (46).
13. Vorrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das obere Lager (6) drei ringsektorförmige Lagerelemente (30, 31, 32) enthält, die sich auf der zum Kragarm (2) entgegen gesetzten Seite am Umfang des Stützrohres (4) abstützen und dass das untere Lager (7) drei ringsektorförmige Lagerelemente (33, 34, 35) enthält, die sich auf der Seite des Kragarms (2) am Umfang des Stützrohres (4) abstützen. 13. Device according to one of claims 1 to 12, characterized in that the upper bearing (6) comprises three annular sector-shaped bearing elements (30, 31, 32), which on the cantilever arm (2) opposite side on the circumference of the support tube ( 4) and that the lower bearing (7) comprises three annular sector-shaped bearing elements (33, 34, 35), which are supported on the side of the cantilever arm (2) on the circumference of the support tube (4).
PCT/EP2009/004338 2008-06-18 2009-06-16 Pivot portal for a furnace WO2009153026A1 (en)

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DE102008028966A DE102008028966A1 (en) 2008-06-18 2008-06-18 Rotary portal for a stove
DE102008028966.3 2008-06-18

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US11852414B2 (en) 2020-04-08 2023-12-26 Badische Stahl-Engineering Gmbh Device for maintaining a tap hole of an electric arc furnace

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CN109208959B (en) * 2018-11-19 2021-10-01 宝钢工程技术集团有限公司 Electrode connecting platform mounted on conductive cross arm

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EP0056224A1 (en) 1981-01-08 1982-07-21 VOEST-ALPINE Aktiengesellschaft Electric furnace, such as an electric-arc furnace or plasma melting furnace
EP0077319A1 (en) 1981-10-09 1983-04-20 VOEST-ALPINE Aktiengesellschaft Electric furnace

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DE3514293A1 (en) * 1985-04-19 1986-10-30 Fuchs Systemtechnik GmbH, 7601 Willstätt LIFTING AND SWIVELING DEVICE FOR THE LID OF THE OVEN CASE OF AN ARC FURNACE
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EP0056224A1 (en) 1981-01-08 1982-07-21 VOEST-ALPINE Aktiengesellschaft Electric furnace, such as an electric-arc furnace or plasma melting furnace
EP0077319A1 (en) 1981-10-09 1983-04-20 VOEST-ALPINE Aktiengesellschaft Electric furnace

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11852414B2 (en) 2020-04-08 2023-12-26 Badische Stahl-Engineering Gmbh Device for maintaining a tap hole of an electric arc furnace

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