EP0029878B1 - Supporting and anchoring of a convertor on a trunnion ring - Google Patents

Description

The invention relates to the storage and attachment of a tiltable vessel or converter on a closed or open to one side, approximately horseshoe-shaped, the converter jacket surrounding the support ring at a distance at three points by means of detachable support and connecting elements arranged at a distance of about 120 ° and on the circumference of the Converter jacket of fixed brackets, one of which lies in the tilting plane of the converter.

For carrying out repairs and for relining converters, it is known to releasably mount them on the support ring surrounding the converter jacket at least around half its circumference at three points. For this purpose, support pins are fastened to the converter jacket and are mounted in bearing bushes which are fastened to the supporting ring by means of swiveling pulling hooks. The support pins are designed as cantilevers and the bearing bushes expediently in two parts (DE-PS 2 051 382). The great weight of the converter, including the pig iron used, requires large dimensions of the support pins and the bearing, including the locking elements. When removing the converter, the bearing must be completely released.

Furthermore, from FR-PS 1 468 079 a releasable mounting for crucibles or converters is known, in which the crucible is supported on the supporting body surrounding it by means of upper and lower support devices. The upper support devices consist of support bodies pivotably mounted on the ring-shaped support body and stop bodies with counter support surfaces rigidly fastened to the jacket of the crucible. The lower support devices are rigidly attached to the crucible wall and can be adjusted to the underside of the supporting body by means of detachable wedge pairs.

The distance between the upper and lower supports is large. During operation, the vessel becomes warmer than the supporting body and an air gap is formed between the contact surfaces as a result of the greater thermal expansion. Since the lining is thinner with each batch and the vessel wall becomes hotter, the expansion increases in the axial direction of the vessel. When swiveling, the crucible or converter falls from the supports on the support bodies onto the wedge pairs after overcoming the friction in accordance with the air gap. The stop bodies are acted upon during the erection. The changing impact loads of the support devices mean a major disadvantage of the known storage.

The object of the invention is to avoid this disadvantage, to reduce the dimensions of the bearing and to design it in such a way that the individual bearing elements do not have to be dismantled when the converter is being removed, while at the same time the connections between the support ring and the converter vessel are easily detachable and after they have taken place Exchange are easily connectable again.

The solution to the problem is to design the mounting and mounting of a tiltable vessel or converter of the type mentioned above in such a way that the support ring has box walls which lead upwards or downwards, in which three support axes are axially parallel to and at a distance vertically below or above that on the converter jacket fixed brackets are arranged, and the bearing housing of the joint bearings assigned to the supporting axles abut the top and bottom of the brackets, and that hinged screws are articulated to the bearing housings and are guided in slots through the brackets.

When carrying out the storage, the converter vessel can be fixed upright on the support ring. The brackets are arranged on the converter jacket above the support ring, and the box walls led upwards accommodate the support axles with bearings, the bearing housings abutting the underside of the brackets. With the support ring closed, the converter vessel is installed from above.

According to another embodiment, the converter vessel can be attached to the support ring in a hanging manner. In this case, the brackets are arranged on the converter jacket below the support ring. In the area of the releasable supporting and connecting elements, the box walls of the support ring are led out downwards. The support axles are located above the brackets and the bearing housings rest on the top of the brackets.

The standing or hanging attachment of the converter vessel is also possible with a horseshoe-shaped support ring that is open on one side. The vessel is generally removed after the connecting elements have been loosened and the vessel has to be lifted slightly in a standing version or the vessel has been lowered slightly in a hanging version towards the open side of the support ring in the horizontal direction.

If the converter is provided with a side spout, and there is no bearing on the support ring on the spout side, in order to keep the heat of the liquid vessel contents away from the storage and to avoid damage from splashes of the liquid metal, and the vessel is replaced for reasons of space the direction opposite the spout, in a hanging arrangement after loosening the connecting elements and slightly lowering the support ring around the converter pivot pin by 90 ° upwards swiveled and the vessel is moved to a repair stand with a converter change carriage.

The pivoting arrangement of the support ring for changing the converter and the need to supply numerous media for the freshness process can lead to bottlenecks when laying the cables. It is therefore proposed in this case to bend the horseshoe-shaped support ring and to fix the console lying in the tilting plane of the converter on the spout side between the spout opening and the angled support ring on the converter jacket.

A replacement of the converter vessel in the spout opposite direction is thus easily possible with the support ring open on this side. The console on the spout side and the associated storage are not endangered due to the greater distance from the spout opening. In addition, in the standing arrangement, the folding screws in the blowing position of the converter are not additionally loaded by the weight of the container.

• Fig. 1 einen Konverter mit geschlossenem Tragring mit im oberen Bereich angeordneter Lagerung und oberhalb angeordneter Konsolen;
• Fig. 2 einen Konverter mit hufeisenförmigem Tragring, unterhalb angeordneter Lagerung und Konsolen;
• Fig. 3 einen Konverter mit abgewinkeltem Tragring, oberhalb angeordneter Lagerung und Konsolen;
• Fig. 4 einen Ausschnitt des Tragringes mit der Lagerung in größerem Maßstab;
• Fig. einen Schnitt nach der Linie V-V der Fig. 4.

The invention will be explained in more detail using an exemplary embodiment shown schematically in the drawing. It shows

• Figure 1 shows a converter with a closed support ring with storage arranged in the upper region and consoles arranged above.
• Figure 2 shows a converter with a horseshoe-shaped support ring, storage and consoles arranged below.
• Figure 3 shows a converter with an angled support ring, above arranged storage and consoles.
• Figure 4 shows a detail of the support ring with the storage on a larger scale.
• 4 shows a section along the line VV in FIG. 4.

1, the converter 1 is mounted on the closed support ring 3 with three consoles 2 arranged on the circumference of its casing 1a at a distance of approximately 120 °, to which the converter pivot pins 4 are flanged. The brackets 2 rest on the bottom surfaces 5a of the bearing housing 5, in which spherical bearings 6 are arranged on support axles 7 mounted in the support ring 3. By means of hinged screws 8 hinged to the bearing housing 5, the non-positive connection of the support ring 3 to the brackets 2 takes place via the sole surfaces 5a.

The converter 1 shown in Fig. 2 is suspended from a horseshoe-shaped support ring 3a. The folding screws 8 establish the non-positive connection between the bearing housings 5 and the brackets 2 arranged below on the converter casing 1 a with a preload corresponding to the converter weight.

3, the converter 1 is supported with its brackets 2 on a horseshoe-shaped, angled support ring 3b.

The console 2 lying in the tilting plane is arranged on the spout side between the spout opening and the angled support ring 3b. The support axles 7 and the bearings 5, 6 are located in box walls 9 of the support ring 3b which are led out upwards and below the brackets. The non-positive connection between converter 1 and support ring 3b is made by means of folding screws 8.

In the enlarged representation according to FIG. 4, 1a denotes the converter jacket to which the brackets 2 are attached. In the box walls 9 of the support ring 3 or 3a or 3b which are led out downwards or upwards (not shown), the support axles 7 are fixedly mounted by means of axle holders. The support axles 7 supported at both ends have smaller dimensions than the known support pins arranged on the converter jacket and are largely unaffected by the heating of the converter jacket. The support axles 7 take up conventional spherical bearings 6 enclosed in housings 5. The distance between the housing 5 and the box walls 9 as well as the oscillating mounting ensure a forced movement in all directions with thermal expansion of the converter. The use of commercially available spherical bearings means an inexpensive solution.

Fig. 5 shows a section through the storage in the section plane V-V of Fig.4. On the bearing housing 5, folding bolts 8 are pivotally articulated in pockets and engage in slots in the consoles 2. The folding screws 8 are designed so that they can absorb the entire weight of the converter and ensure a secure connection between the bearing housing 5 and the brackets 2. The number of folding screws 8 per bearing depends on the size and weight of the converter.

Claims (4)

1. Mounting and fixing a tiltable vessel or converter on a substantially horseshoe-shaped carrier ring which is closed or open towards one side and which surrounds the converter casing at a spacing, at three points, by means of releasable support and connecting elements which are arranged at spacings of about 120°, and brackets secured to the periphery of the converter casing, one of said brackets being disposed in the plane of tilting movement of the converter, characterised in that the carrier ring (3, 3a, 3b) has upwardly or downwardly extended box walls (9) in which three carrier axis members (7) arranged, with axes parallel to and at a spacing perpendicularly below or above the brackets (2) which are fixed to the converter casing (1a), and the bearing housings (5) of the pivot bearings (6) associated with the carrier axis members (7) bear against the top or bottom of the brackets (2), and that hinged screws (8) are pivoted to the bearing housings (5) and are passed in slots through the brackets (2).

2. Mounting and fixing a tiltable vessel or converter according to claim 1 characterised in that, when the converter vessel (1) is fixed on the carrier ring (3, 3b) in an upstanding position, the brackets (2) are arranged on the converter casing (1a) above the carrier ring (3, 3b), and the upwardly extended box walls (9) receive the carrier axis members (7) and the bearing housings (5) bear against the underside of the brackets (2).

3. Mounting and fixing a tiltable vessel or converter according to claim 1, characterised in that, when the converter vessel (1) is arranged in a hanging position, the brackets (2) are arranged on the converter casing (1 a) below the carrier ring (3a) and the downwardly extended box walls (9) receive the carrier axis members (7) and the bearing housings (5) bear on the top side of the brackets (2).

4. Mounting and fixing a tiltable vessel or converter according to claims 1 and 2 characterised in that teh horseshoe-shaped carrier ring (3b) is bent down and the bracket (2) which is disposed in the plane of tilting movement of the converter (1) is fixed to the converter casing (1a) on the pouring side between the pouring opening and the downwardly bent carrier ring (3b).

Images