DE2901011B1

DE2901011B1 - Bearing pin fastening for ladles in Huettenwerke

Info

Publication number: DE2901011B1
Application number: DE19792901011
Authority: DE
Inventors: Paul Telaak
Original assignee: BERNINGHAUS FA EWALD
Current assignee: BERNINGHAUS FA EWALD
Priority date: 1979-01-12
Filing date: 1979-01-12
Publication date: 1979-12-13

Description

Die neuartig ausgebildete Befestigungsplatte hat den wesentlichen Vorteil, daß insgesamt nur vier umlaufende Schweißnähte benötigt werden, die von außen leicht zugänglich sind und daher auch mit Ultraschallgeräten o.dgl. leicht überprüft werden können. Die an den seitlichen Rändern angegossenen Schenkel haben einen wesentlich einfacheren Aufbau, da sie einerseits nur in einer Richtung verlaufen und andererseits ihre Anlagefläche geradlinig ist, da sie lediglich entsprechend der konischen Form des Mantels verlaufen muß. Gegenüber den vorbekannten Ausführungen entfallen komplizierte Anlageflächen, so daß der Anguß bei relativ geringem Gewicht gießtechnisch einfacher ausgeführt werden kann. Die Fertigung sowohl des Angusses als auch das Anschweißen ist daher wesentlich einfacher und preiswerter. The newly designed mounting plate has the essential Advantage that a total of only four circumferential weld seams are required are easily accessible outside and therefore also with ultrasonic devices or the like. easy can be checked. Have the legs cast on the side edges a much simpler structure, since on the one hand they only run in one direction and on the other hand, its contact surface is straight, since it is only accordingly the conical shape of the jacket must run. Compared to the previously known Complicated contact surfaces are omitted, so that the sprue is relatively low weight can be performed more easily in terms of casting technology. Manufacturing both the sprue as well as the welding is therefore much easier and cheaper.

Lagerzapfen der gattungsgemäßen Art bedürfen weiterhin in bestimmten Zeitabständen einer Überprüfung auf Risse o. dgl. Eine in bekannter Weise mit Schrumpfsitz auf den Lagerzapfen aufgetriebene Verschleißbuchse aus Stahl mußte bisher immer unter Zerstörung entfernt werden, um den Lagerzapfen mittels Ultraschallgerät von außen überprüfen zu können. Um ein zerstörungsfreies Abziehen der Verschleißbuchse zu ermöglichen, sind erfindungsgemäß in den Eckbereichen der Befestigungsplatte Längsschlitze vorgesehen, welche bis zu einem zwischen der Befestigungsplatte und dem Mantel befindlichen Hohlraum reichen. In vorteilhafter Weise können in diese Längsschlitze Hammerkopfschrauben von Abzieh- und Auftreibvorrichtungen eingesetzt werden, mit deren Hilfe die Verschleißbuchse abgezogen bzw. Trunnions of the generic type continue to be required in certain Time intervals of a check for cracks or the like. One in a known manner with a shrink fit Up to now, wear bushing made of steel that is driven onto the bearing journal has always been a must can be removed with destruction to remove the bearing pin by means of an ultrasonic device to be able to check outside. A non-destructive pulling off of the wear sleeve to enable are according to the invention in the corner areas of the mounting plate Longitudinal slots are provided, which up to one between the mounting plate and the shell located cavity reach. Advantageously, in this Longitudinal slots T-head bolts used by pullers and drifters with the help of which the wear bushing can be removed or removed.

wieder aufgetrieben werden kann.can be raised again.

Der Gegenstand der Erfindung ist in der Zeichnung anhand eines Ausführungsbeispiels dargestellt; es zeigt Fig. 1 die seitliche Ansicht einer Gießpfanne mit einer Lagerzapfenbefestigung, F i g. 2 die Lagerzapfenbefestigung des Gegenstandes der Fig. 1 in einer größeren Darstellung, F i g. 3 den Gegenstand der F i g. 2 nach Linie 1-1 und F i g. 4 den Gegenstand der Fig. 2 nach Linie ll-ll. The object of the invention is shown in the drawing using an exemplary embodiment shown; It shows Fig. 1 the side view of a pouring ladle with a journal attachment, F i g. 2 the trunnion fastening of the object of FIG. 1 in a larger one Illustration, FIG. 3 the subject of FIG. 2 to line 1-1 and F i g. 4 den Subject of Fig. 2 along line II-II.

Die in Fig. 1 dargestellte Gießpfanne hat einen Mantel 1 aus Blech, der auf zwei einander gegenüberliegenden Seiten mit je einem Lagerzapfen 3 versehen ist. The ladle shown in Fig. 1 has a jacket 1 made of sheet metal, each provided with a bearing pin 3 on two opposite sides is.

Die Gießpfanne ist in bekannter Weise innen mit einem feuerfesten Material ausgekleidet. Auf dem Mantel 1 sind zwei umlaufende Versteifungsringe 2 angebracht, zwischen denen der Lagerzapfen auf jeder Seite befestigt ist.The ladle is internally refractory in a known manner Lined material. There are two circumferential stiffening rings 2 on the jacket 1 attached, between which the bearing pin is attached on each side.

Zur Befestigung ist, wie insbesondere die F i g. 3 und 4 zeigen, im Bereich des Fußes des Lagerzapfens 3 eine Befestigungsplatte 4 angegossen. Der ringförmige Fuß 5 des Lagerzapfens ragt in einen kreisförmigen Ausschnitt des Mantels 1 und ist dort mittels einer Schweißnaht 6 am Rand dieses Ausschnittes befestigt. For fastening, as shown in particular in FIG. 3 and 4 show A fastening plate 4 is cast on in the area of the foot of the bearing pin 3. Of the annular foot 5 of the bearing pin protrudes into a circular section of the jacket 1 and is attached there by means of a weld 6 on the edge of this cutout.

Im zentrischen Bereich ist noch eine Abdeckscheibe 7 mittels einer Schweißnaht 8 angeschweißt, damit eine gleichmäßige Ausmauerung angebracht werden kann.In the central area is a cover 7 by means of a Weld seam 8 welded so that a uniform brick lining must be attached can.

Die Befestigungsplatte hat, wie insbesondere F i g. 2 zeigt, im Grundriß eine rechteckige Form. Der Abstand zwischen dem oberen Rand 9 und dem unteren Rand 11 ist so gewählt, daß diese stumpf gegen die Versteifungsringe 2 anliegen und mittels einer durchlaufenden geradlinigen Schweißnaht 10 bzw. 12 an diesen Versteifungsringen befestigt werden können. Die seitlichen Ränder verlaufen geradlinig von dem oberen Versteifungsring 2 zu dem unteren Versteifungsring 2. The mounting plate has, as in particular FIG. 2 shows in plan a rectangular shape. The distance between the top edge 9 and the bottom edge 11 is chosen so that these butt against the stiffening rings 2 and by means of a continuous straight weld seam 10 or 12 on these stiffening rings can be attached. The side edges are straight from the top Stiffening ring 2 to the lower stiffening ring 2.

An diesem Rand sind, wie insbesondere F i g. 4 zu erkennen gibt, seitliche Schenkel 13 angegossen, welche etwa rechtwinklig zur Befestigungsplatte 4 verlaufen und am Mantel 1 zur Anlage kommen. Die Anlagefläche eines jeden seitlichen Schenkels 13 verläuft geradlinig entsprechend der Konusform des Mantels 1. Die am Mantel anliegenden Außenränder der seitlichen Schenkel 13 werden mittels Schweißnähten 14 am Mantel befestigt.At this edge, as in particular FIG. 4 can be seen, lateral Legs 13 cast on, which run approximately at right angles to the mounting plate 4 and come to rest on jacket 1. The contact surface of each side leg 13 runs in a straight line according to the conical shape of the jacket 1. The ones resting on the jacket Outer edges of the side legs 13 are welded 14 on the jacket attached.

Abgesehen von den Schweißnähten 6, 8, die vom Mantelinnern her angebracht werden, sind zum Anbringen der Befestigungsplatte 4 insgesamt nur vier geradlinig verlaufende Schweißnähte, nämlich zwei Schweißnähte 10 und zwei Schweißnähte 14, erforderlich. Diese sind nicht nur leicht anzubringen, sondern können auch einfach mittels Ultraschallgerät o. dgl. Apart from the welds 6, 8, which are attached from the inside of the jacket are, a total of only four are straight for attaching the mounting plate 4 running weld seams, namely two weld seams 10 and two weld seams 14, necessary. Not only are these easy to install, but they can also be simple by means of an ultrasound device or the like.

geprüft werden.being checked.

Auf dem Lagerzapfen 5 ist eine Verschleißbuchse 16 mit Schrumpfsitz aufgetrieben. Um den Lagerzapfen mittels eines Ultraschallgerätes o. dgl. von außen prüfen zu können, muß diese Verschleißbuchse 16 abgenommen werden. Zur Erleichterung des Abziehens und auch des Wiederauftreibens sind in der Befestigungsplatte 4 im Eckbereich Längsschlitze 17 angebracht, in welche Hammerkopfschrauben einer Abzieh- und Auftreibvorrichtung eingesteckt werden können. Diese ragen bis zu den Hohlräumen, die zwischen dem Gußstück und der Wand 1 verbleiben, hindurch, so daß dort die Hammerkopfschrauben entsprechend umgedreht werden können. Die Verschleißbuchse 16 wird innen durch einen Kragen 15 begrenzt. On the bearing pin 5 is a wear bushing 16 with a shrink fit distended. To the bearing pin by means of an ultrasonic device or the like. From the outside To be able to check, this wear sleeve 16 must be removed. To make things easier the pulling and also the re-inflation are in the mounting plate 4 in Corner area longitudinal slots 17 attached, in which hammer head screws of a pulling and expanding device can be inserted. These protrude up to the cavities, which remain between the casting and the wall 1 through, so that there the hammer head screws can be reversed accordingly. The wear sleeve 16 is inside by a Collar 15 limited.

Bei kleineren Gießpfannen kann der ringförmige Fuß 5 des Lagerzapfens 3 auch in Fortfall kommen. Haben diese keine Versteifungsringe 2, so können am oberen und unteren Rand 9, 10 der Befestigungsplatte 4 Schenkel angegossen sein, welche den seitlichen Schenkeln 13 entsprechen, jedoch zwecks Anlage an den Mantel 1 eine bogenförmige Anlagefläche haben. In the case of smaller ladles, the ring-shaped foot 5 of the bearing pin 3 also come in failure. If these have no stiffening rings 2, then on the upper and lower edge 9, 10 of the mounting plate 4 legs be cast, which the side legs 13 correspond, but for the purpose of contact with the jacket 1 a have arcuate contact surface.

Claims

Claims: 1. Bearing pin fastening for casting ladles in iron and steel works, the bearing pin with its foot in a cutout of the shell of the pouring ladle protrudes and is welded to the edge of the cutout and with one on the side Bearing pin attached in the plan is provided with a rectangular mounting plate, which, lying between two stiffening rings attached to the shell of the ladle, is welded to the jacket and to these stiffening rings, marked thereby e t that the mounting plate cast on the bearing pin (3) in a manner known per se (4) each provided with a cast-on leg (13) on their lateral edges which is approximately perpendicular to the mounting plate and between the stiffening rings (2) run against the jacket (1) and are welded to it.

2. Bearing pin fastening according to claim 1, characterized in that that in the corner areas of the mounting plate (4) longitudinal slots (17) are provided are, which are located up to one between the mounting plate and the jacket (1) Cavity range.

The invention relates to a journal mount for pouring ladles in iron and steel works, with the bearing pin with its foot in a cutout of the jacket the ladle protrudes and is welded to the edge of the cutout and with a Fastening plate attached to the side of the bearing pin and rectangular in plan is provided, which, between two stiffening rings attached to the shell of the ladle lying, is welded to the jacket and to these stiffening rings and has a particularly expedient embodiment of the subject, through which the journal attachment is significantly simplified and improved.

Ladles for steel and other metal melts have two opposing sides on the jacket bearing journals into which the pan hanger a crane system intervenes. Because the dead weight (without lining) of the ladle between 40 and 60 t, prepares the mounting of the bearing pin on the jacket considerable difficulties.

From US-PS 3540 713 a journal attachment is known in which the bearing pin is attached to the shell of the pouring ladle with the help of a block part is. The block part is provided with a hole through which the bearing pin protrudes Such a hole is very complex and requires a high degree of dimensional accuracy, otherwise there will be an unfavorable distribution of forces.

The pin is welded to this block part.

Furthermore, the block part must be heavy and massive be forged or rolled in a complex manner, with a precise shape to the shape of the jacket is required.

Solid block parts of this type have a weight that is around 50% higher than with a cast design, which is at the expense of the ladle's capacity. Farther there is the disadvantage that the block parts only with the help because of the flat system a complex fillet weld on the jacket can be welded. Make fillet welds but very easily at the high temperatures of around 200 to 250 "C which occur there to cracks.

In another known embodiment according to DE-AS 11 72 404 the bearing pin sits in a sleeve, at the end of which a bearing plate is attached is. The whole journal attachment consists of three components that are joined together and have to be welded together. At the top are curved inwards There are edges that rest against the jacket and are welded to it. In addition, ribs are welded onto the jacket before the bearing journal is attached, which run vertically. The end shield is then placed on these ribs and welded to the side ribs. There are above and below the rifle short ribs. There are small openings in the end shield in the area of these short ribs are present, which are located above these central parts of the rib. This journal attachment has no stiffening rings and is therefore and because of the constructive training only suitable for small pans up to approx. 10 t.

Finally, a fastening of this type is known in which the The foot of the journal protrudes into a cutout of the jacket and with the edge of this The cutout is welded. The bearing journal receives an additional attachment according to DE-GbmS 7433495 by a cross-like gate, the neighboring Edges of the arms are provided with cast, angular legs that are attached to the The jacket and are welded to it. In addition, the front ends are the Arms on one side to two stiffening rings attached to the shell of the ladle and on the other hand on two lateral stiffening plates welded to the jacket welded on. However, this design has the disadvantage of a large number of welds, most of which are difficult to access.

The difficult-to-access weld seams continue to make a mandatory one difficult Checks after assembly and at certain intervals for control purposes. The cross-like sprue was also difficult to manufacture in terms of casting technology, especially the Contact surfaces of the angular legs between the adjacent edges of the Arms had to be conical in the vertical direction and a conical in the horizontal direction have a circular course corresponding to the outer surface of the jacket.

In contrast, the invention is based on the object of a journal mounting of the generic type in such a way that it has a simple structure, is inexpensive to manufacture and a simple check for cracks o. The like. Enables.

This object is achieved according to the invention in that the in an is known way on the bearing pin cast mounting plate on their side Edges are each provided with a cast leg, which is approximately perpendicular to the Fastening plate and running between the stiffening rings rest on the jacket and are welded to this.