EP0015893A1 - Supporting and guiding frame for a curved continuous-casting plant - Google Patents

Abstract

In the case of a support and guide frame for a continuous sheet caster with interchangeable support segments (6) supported on a support frame (1), in which the rollers (11, 13, 16) of the opposing inner and outer guide tracks (12 and 14) are spaced apart are mounted from one another, in the center (18) of the circular arc, along which the support segments (6) are arranged, a pivot lever (19), the length of which is shorter than the radial distance from the center (18) to the support segments (6) Devices (31, 32) for grasping and pulling out individual support segments. In order to get by without a car to accommodate a support segment (6) and to ensure that the detected segment is securely held and guided during the expansion, telescopic guide rails (28) are provided on the swivel lever (19), which after being pushed in the strand guide track (12 or 14) comprises a support segment (6) in the form of a fork, counter guides (33) fastened to the support segment (6) engaging with the guide rails (28), whereupon the support segment (6) extends along the guide rails (28) the installation position is removable.

Description

The invention relates to a support and guide frame for a continuous caster with interchangeable support segments supported on a support frame, in which the rollers of the opposing inner and outer guideway are mounted at a distance from each other, a in the center of the arc, along which the support segments are arranged Swivel lever, the length of which is shorter than the radial distance from the center to the support segments, with devices for detecting and pulling out individual support segments.

Changing devices for support segments of strand guides with a pivot lever are already known and described for example in DE-PS 1 285 095. In this known construction, a carriage is movably arranged in the swivel lever, which engages under the guide segment and which, after it has been extended into the strand guide track, is connected to the segment to be extended and takes the segment with it.

The invention has for its object to provide an improved, structurally less complex changing device without the need for a separate carriage to accommodate a support segment, and in the safe is that the detected segment is securely held and guided during the expansion, the device can also be used for segments of heavy construction.

This object is achieved according to the invention in a support and guide frame of the type mentioned at the outset in that telescopic guide rails which can be telescoped in and out are provided which, after being pushed out into the strand guide track, comprise a support segment in the form of a fork, with counter guides attached to the support segment engaging with the guide rails reach, whereupon the support segment along the guide rails can be removed from the installation position.

The counter guides on the support segment are advantageously designed as wheels or rollers.

The pivot lever and the guide rails are expediently designed as C-shaped profiles and, in the retracted position, recesses are provided in the pivot lever and in the guide rails for passage of the counter-guides.

According to a preferred embodiment, a cable winch for pulling out the segment and an actuating drive for pushing the guide rails in and out are arranged in the center of the circular arc.

A hydraulic drive which is movable with the swivel lever is preferably provided for pushing the guide rails in and out.

Another object of the invention is to be able to replace the support segments without jamming, etc. even if the center distances of adjacent rollers are very small.

This object is achieved in that at least one edge-side roller of the outer web attached to a support is releasably attached to the segment on each support segment, the carrier with the roller being removable into a recess on the support frame during the removal of the segment.

This makes it possible to arrange the rollers at a very small distance from one another without colliding with an adjacent element when a segment is being removed.

The invention is explained in a schematic representation on the basis of two embodiments in the drawing, wherein FIGS. 1 to 4 each show a side view (partially sectioned) of a guide arch according to one embodiment. FIG. 5 shows a view in the direction of arrow V of FIG. 1. Another embodiment is shown in FIG. 6 in a representation analogous to FIG. 1.

On a one-piece circular-arched support frame 1, which is mounted on the foundation 2 by means of a fixed bearing 3 and two floating bearings 4, support surfaces 5 are provided which are machined inwards and on each of which a segment 6 is supported. The support frame 1 could also be constructed in several parts, each of the parts being supported against the foundation by means of a fixed bearing and a floating bearing. The segments 6 have machined mating surfaces 7 which match the supporting surfaces, so that the installation of the individual segments 6 is easily possible without fitting work in the event of an exchange. Between the support surfaces 5 there is a pocket 8 of approximately trapezoidal cross-section. At the upper end 9 of the support frame 1, on which the uppermost segment is arranged, there is also a pocket 10 which has a rectangular cross section.

In the segments 6, which are advantageously designed similarly to one another, the rollers 11 of the inner web 12 and the rollers 13-of the outer web 14 are mounted opposite one another at a distance from one another, with the edge-side first roller, which is designated by 16, in each case Outer web 14 is releasably attached to segment 6, etc. such that their bearings are arranged on a cross member 17, which in turn is releasably attached to segment 6.

In the center 18 of the arcuate guideways 12, 14 is a pivot lever 19, the length 20 of which is shorter than the radial distance 21 from the center to the support segments 6, pivotally mounted. A fixed cable drive 22 is used for pivoting, the cable 23 of which is attached to the end 24 of the pivot lever 19. The pivoting lever 19 has two C-shaped profiles 25 arranged at a distance 26 from one another, the distance 26 being kept somewhat larger than the width 27 of the support segments 6. In these C-shaped profiles 25 there are also C-shaped profiles 28 - And extendable guide rails provided. A pushable pinion 29, which is rotatably mounted in the center 18 and which engages in a toothed rack arranged on the underside of this C-shaped carrier, is used for pushing out and pushing in these guide rails. Instead of the pinion and the toothed rack, a pressure medium cylinder 30 could also be provided, as shown in FIG. 6. In the center 18, a cable winch 31 is also rotatably mounted, the cable 32 of which can be fastened to the segment 6 to be removed.

• Zunächst wird mittels des Seiltriebes 22 der Schwenkhebel bei dem auszubauenden Stützsegment 6 in Stellung gebracht, wobei die ein- und ausschiebbaren Führungsschienen 28 sich in zurückgezogener Stellung befinden. Bei diesem Segment 6 wird die am Träger 17 gelagerte Rolle 16 vom Stützsegment 6 durch Lösen des Trägers 17 gelöst und der Träger wird mitsamt der Rolle in der am Tragrahmen 1 vorgesehen Ausnehmung 10 befestigt. Die Führungsschienen 28 werden nach außen verschoben, wobei die Führungsschienen 28 mit an den Seiten der Stützsegmente 6 angeordneten Gegenführungen, die als Räder 33 ausgebildet sind, in Eingriff gelangen. Sodann wird das Seil 32 am Stützsegment befestigt (Fig. 1). Als nächster Schritt wird, wie aus Fig. 2 ersichtlich ist, das Stützsegment 6 mittels des Seiles 32 zurückgezogen, bis es sich in der in Fig. 2 dargestellten Ausbaustellung befindet. Die Rückzugsbewegung des Segmentes 6 ist durch einen Anschlag 34 begrenzt. Nachfolgend werden die Führungsschienen 28 zurückgezogen, bis sie sich in der in Fig. 3 dargestellten Rückzugsposition befinden. In dieser Position gelangen an.der Oberseite der C-förmigen Profile 25 und 28 angeordnete öffnungen 35 bzw. 36 übereinander. Als nächster Schritt wird der Schwenkhebel 19 in horizontale Stellung geschwenkt, was mittels des Seiltriebes 22 erfolgt. Nach Auskuppeln des Seiles 32 aus dem im Schwenkhebel 19 befindlichen Stützsegment 6 kann das Segment, wie in Fig. 4 dargestellt, mittels eines Kranes aus dem Schwenkhebel 19 gehoben werden.

The function of the facility is as follows:

• First, the swivel lever is brought into position in the support segment 6 to be removed by means of the cable drive 22, the guide which can be pushed in and pushed out rails 28 are in the retracted position. In this segment 6, the roller 16 mounted on the carrier 17 is detached from the supporting segment 6 by loosening the carrier 17 and the carrier is fastened together with the roller in the recess 10 provided on the support frame 1. The guide rails 28 are displaced outwards, the guide rails 28 engaging with counter guides arranged on the sides of the support segments 6, which are designed as wheels 33. The rope 32 is then attached to the support segment (FIG. 1). As the next step, as can be seen from FIG. 2, the support segment 6 is pulled back by means of the cable 32 until it is in the expanded position shown in FIG. 2. The retraction movement of the segment 6 is limited by a stop 34. The guide rails 28 are then retracted until they are in the retracted position shown in FIG. 3. In this position, openings 35 and 36 arranged one above the other arrive at the top of the C-shaped profiles 25 and 28. As the next step, the pivot lever 19 is pivoted into the horizontal position, which is done by means of the cable drive 22. After the cable 32 has been disengaged from the support segment 6 located in the pivot lever 19, the segment, as shown in FIG. 4, can be lifted out of the pivot lever 19 by means of a crane.

Claims (6)

1.Supporting and guiding scaffolding for a continuous sheet caster with interchangeable supporting segments supported on a supporting frame, in which the rollers of the opposing inner and outer guideway are mounted at a distance from one another, with a pivot lever in the center of the circular arc, along which the supporting segments are arranged, the length of which is shorter than the radial distance from the center point to the support segments, with means for detecting and pulling out individual support segments, characterized in that telescopic guide rails (28) which can be pushed in and pushed out are provided on the swivel lever (19), which after being pushed out into the strand guide track (12 or 14) comprises a support segment (6) in the form of a fork, counter guides (33) fastened to the support segment (6) engaging with the guide rails (28), whereupon the support segment (6) extends along the guide rails (28) the installation position is removable. 2. Scaffolding according to claim 1, characterized in that the counter guides on the support segment (6) are designed as wheels or rollers (33). 3. Scaffolding according to claims 1 or 2, characterized in that the pivot lever (19) and the guide rails (28) are designed as C-shaped profiles and that in the retracted position in the pivot lever and in the guide rails recesses (35, 36) for Passage of the counter guides are provided. 4. Scaffold according to claims 1 to 3, characterized in that in the center (18) of the circular arc a cable winch (31) for pulling out the segment (6) and an actuator (29) for pushing the guide in and out rails (28) are arranged .. 5. Scaffolding according to claims 1 to 4, characterized in that for the insertion and removal of the guide rails (28) with a pivoting lever (19) with a movable hydraulic drive (30) is provided (Fig. 6). 6. Scaffolding according to claims 1 to 5, characterized in that on each support segment (6) at least one on a support (17) attached edge-side roller (16) of the outer web (14) is releasably attached to the segment (6), while the removal of the segment (6) of the carrier (17) with the roller (16) in a recess (8, 10) on the support frame (1) can be removed.

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