DE858418C - Support beam made of heat-resistant steel for walking beam ovens - Google Patents

Support beam made of heat-resistant steel for walking beam ovens

Info

Publication number
DE858418C
DE858418C DEO1672A DEO0001672A DE858418C DE 858418 C DE858418 C DE 858418C DE O1672 A DEO1672 A DE O1672A DE O0001672 A DEO0001672 A DE O0001672A DE 858418 C DE858418 C DE 858418C
Authority
DE
Germany
Prior art keywords
heat
resistant steel
ovens
section
support beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEO1672A
Other languages
German (de)
Inventor
Karl Dipl-Ing Bank
Rudolf Hertel
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.)
OFAG OFENBAU AG
Original Assignee
OFAG OFENBAU 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 OFAG OFENBAU AG filed Critical OFAG OFENBAU AG
Priority to DEO1672A priority Critical patent/DE858418C/en
Application granted granted Critical
Publication of DE858418C publication Critical patent/DE858418C/en
Expired legal-status Critical Current

Links

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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/022—Skids

Description

Es ist allgemein üblich, die Tragbalken für Hubbalkenöfen aus hitzebeständigem Stahl in entsprechenden Formen zu gießen. Die Querschnitte solcher Balken sind meist I-förmig oder mehr oder weniger rechteckig und dabei hohl. Die Querschnittsformen sind so beschaffen, daß der Tragbalken in der waagerechten Ebene ein genügend großes Widerstandsmoment erhält, um bei den in Wärmöfen vorkommenden Temperaturen ausreichende Festigkeit zu haben. Gleichzeitig muß versucht werden, das Widerstandsmoment in der vertikalen Ebene auch möglichst groß zu machen, um ein seitliches Ausweichen der Balken unter Belastung und damit Störungen im Betrieb zu vermeiden.It is common practice for the supporting beams for walking beam furnaces to be made of heat-resistant material Casting steel in appropriate forms. The cross sections of such beams are mostly I-shaped or more or less rectangular and hollow. The cross-sectional shapes are designed in such a way that the supporting beam is sufficiently large in the horizontal plane Moment of resistance is given to be sufficient at the temperatures occurring in heating ovens To have strength. At the same time, an attempt must be made to reduce the section modulus in Make the vertical plane as large as possible to avoid sideways evasion to avoid the beam under load and thus disruptions in operation.

Diese Balken werden in Sandformen gegossen. Insbesondere bei dem I-förmigen Querschnitt, aber auch bei dem rechteckigen Hohlquerschnitt sind dabei an. den Ecken Lunkerbildungen nicht immer zu vermeiden. Diese Lunker bilden den Beginn der Zerstörung für den gesamten Balken sowohl durch Belastung bei den hohen Arbeitstemperaturen als auch durch Beeinflussung durch die Brennergase.These beams are poured into sand molds. Especially with the I-shaped one Cross-section, but also for the rectangular hollow cross-section, are on. the corners The formation of cavities cannot always be avoided. These cavities form the beginning of the destruction for the entire beam as a result of stress at the high working temperatures as well as by the influence of the burner gases.

Gegenstand der vorliegenden Erfindung ist es nun, die Tragbalken für Hubbalkenöfen aus runden, geschleuderten oder gewalzten Röhren herzustellen. Diese geschleuderten oder gewalzten Rohre besitzen auf Grund des Herstellungsverfahrens ein lunkerfreies, dichtes Gefüge. Hierdurch werden die eingangs beschriebenen Nachteile unbedingt vermieden.The object of the present invention is now to provide the support beams for Manufacture walking beam furnaces from round, centrifuged or rolled tubes. These hurled or rolled tubes due to the manufacturing process a void-free, dense structure. This eliminates the disadvantages described above absolutely avoided.

Die Erfindung besteht weiter in der Maßnahme, solche Röhre mit einer durch seitliches Zusammendrücken erzeugten, mehr oder weniger ovalen bis rechteckigen Querschnittsform zu verwenden.The invention further consists in the measure, such a tube with a produced by lateral compression, more or less oval to rectangular Use cross-sectional shape.

Das dichte Gefüge des geschleuderten oder gewalzten Rohres läßt eine derartige Verformung ohne weiteres zu.The dense structure of the hurled or rolled pipe leaves one such deformation readily increases.

Um bei hohen Temperaturen, bei denen das Material sich bereits in einem fast plastischen Zustand befindet, ein Zusammendrücken oder Auseinandergehen des so erhaltenen Querschnittes zu verhindern, können erfindungsgemäß zwischen den senkrechten Wänden Stehbolzen in einer an und für sich bekannten Form angeordnet und gegebenenfalls auch noch Sicken in zweckmäßiger Form eingepreßt werden.To be used at high temperatures where the material is already in is in an almost plastic state, a squeezing or moving apart To prevent the cross-section obtained in this way, according to the invention between the vertical walls stud bolts arranged in a form known per se and if necessary, beads can also be pressed in in an appropriate form.

In der Zeichnung sind Beispiele des Erfindungsgegenstandes dargestellt.Examples of the subject matter of the invention are shown in the drawing.

Abb. i zeigt den Querschnitt des zusammengedrückten Schleuderguß- oder gewalzten Rohres in ovaler Form; Abb. 2 zeigt eine mehr ausgeprägte rechteckige Form; Abb. 3 zeigt den Tragbalken in Längsansicht.Fig. I shows the cross-section of the compressed centrifugal cast or rolled tube in oval shape; Fig. 2 shows a more pronounced rectangular one Shape; Fig. 3 shows the support beam in a longitudinal view.

In allen drei Abbildungen sind die erwähnten Stehbolzen beispielhaft angedeutet.The stud bolts mentioned are exemplary in all three figures indicated.

Abb. q., 5 und 6 zeigen Ausführungsbeispiele des Balkens mit quer zur Längsachse eingepreßten Sicken, die übrigens allein oder im Verein mit den Stehbolzen zur Anwendung kommen können; Abb. 7 zeigt, wie die Sicken ebenfalls parallel der Längsachse der Balken vorgesehen werden können.Fig. Q., 5 and 6 show embodiments of the beam with transverse grooves pressed into the longitudinal axis, which by the way alone or in conjunction with the stud bolts can be used; Fig. 7 shows how the beads are also parallel to the Longitudinal axis of the bars can be provided.

Claims (3)

PATENTANSPRÜCHE: i. Tragbalken aus hitzebeständigem Stahl für Hubbalkenöfen, gekennzeichnet durch Verwendung eines mit rundem Querschnitt erzeugten Schleuderguß- oder gewalzten Rohres, das zur Erzielung eines erforderlichen ovalen oder rechteckigen Querschnittes entsprechend zusammengedrückt ist. PATENT CLAIMS: i. Supporting beam made of heat-resistant steel for walking beam furnaces, characterized by the use of a centrifugally cast or rolled tube produced with a round cross-section, which is correspondingly compressed to achieve a required oval or rectangular cross-section. 2. Tragbalken nach Anspruch i, gekennzeichnet durch Stehbolzen zwischen den senkrechten Wandungen. 2. Support beam according to claim i, characterized by stud bolts between the vertical walls. 3. Tragbalken nach Anspruch i und 2, gekennzeichnet durch in die senkrechten Wandungen eingepreßte Sicken.3. Supporting beam according to claim i and 2, characterized by in the vertical walls pressed-in beads.
DEO1672A 1951-06-22 1951-06-22 Support beam made of heat-resistant steel for walking beam ovens Expired DE858418C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO1672A DE858418C (en) 1951-06-22 1951-06-22 Support beam made of heat-resistant steel for walking beam ovens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO1672A DE858418C (en) 1951-06-22 1951-06-22 Support beam made of heat-resistant steel for walking beam ovens

Publications (1)

Publication Number Publication Date
DE858418C true DE858418C (en) 1952-12-08

Family

ID=7349653

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO1672A Expired DE858418C (en) 1951-06-22 1951-06-22 Support beam made of heat-resistant steel for walking beam ovens

Country Status (1)

Country Link
DE (1) DE858418C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0007296A1 (en) * 1978-06-23 1980-01-23 VOEST-ALPINE Aktiengesellschaft Skid pipe more particularly adapted to be used in a pusher type furnace and production of high pressure saturated vapour therewith

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0007296A1 (en) * 1978-06-23 1980-01-23 VOEST-ALPINE Aktiengesellschaft Skid pipe more particularly adapted to be used in a pusher type furnace and production of high pressure saturated vapour therewith

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