Patent Grant
9057113
The present application is a 371 of International application PCT/EP2010/068087, filed Nov. 24, 2010, which claims priority of DE 10 2009 056 219.2, filed Nov. 28, 2009, the priority of these applications is hereby claimed and these applications are incorporated herein by reference.
The invention relates to a fastening system for tiltable metallurgical treatment vessels, particularly converters, wherein the treatment vessel is supported in a support ring which is connected through plate-like elements to the treatment vessel casing, wherein each element consists of a plate which is connected to the support ring through an end plate and a first fastening bracket, and which is connected to the treatment vessel casing through another end plate and a second fastening bracket.
Converters are rotatable metallurgical reaction vessels for refining the liquid pig iron. Because of the high temperatures, thermal expansion causes problems in the mounting of the treatment vessel.
In order to be able to compensate for the thermal expansion and to still be able to ensure a seat without play of the converter in its support ring, DE 19 03 685 proposes a fastening system with support strips between support ring and converter casing. In this connection, the support strips have the purpose of facilitating relative movement of converter and support ring.
EP 1 061 138 B1 also discloses a vessel suspension for a converter, wherein the upper chord and the lower chord are connected to each other through releasable, frictionally engaging and positively engaging tension element connections.
When using such converters with this type of vessel fastening, there is the disadvantage that during cleaning operations, such as, for example, removing caked-on slag, the safety plates, which serve for fixing the plate-like element receiving plate in the area of the lateral bracket plates, are loosened or are even torn off. If the safety plates are damaged, it is necessary to repair or replace them. This leads to increases in the costs of the necessary repairs.
Therefore, it is the object of the present invention to improve the known vessel fastenings and, thus, to avoid the aforementioned disadvantage.
In accordance with the invention, this object is met by a fastening system for tiltable metallurgical treatment vessels, particularly converters, wherein the treatment vessel is supported in a support ring which is connected to the treatment vessel casing through plate-like elements, wherein each element is composed of a thin plate which is connected to the support ring through an end plate and a first fastening bracket and which is connected to the treatment vessel casing through another end plate and a second fastening bracket, wherein the end plate is clamped by means of a wedge without play between the cheeks of the fastening bracket, wherein the wedge, in turn, rests against a lug which is welded to the cheeks of the fastening bracket so as to span over the fastening bracket, and wherein the wedge is operatively connected to the lug through a screw connection.
The screw connection includes a threaded piece for fixing the wedge without play.
The threaded piece is preferably secured by a welded seam after the wedge has been adjusted.
Consequently, in the fastening system according to the invention, the threaded piece and the lug are secured so as to prevent loss thereof. As a result, the fastening system no longer has any loose or releasable components. When mounting the plate-like elements on the support ring or the converter vessel, the individual parts can be assembled without play and are connected to each other undetachably.
In the drawings:
Initially, reference will be made to
In order to facilitate tilting of the converter, the converter is arranged in a support ring 2 which is supported through pins 3 in the drive system 4.
The connection between the support ring 2 and the treatment vessel casing is achieved through the fastening system 10 consisting of plate-like elements 11.
The invention is directed to the configuration of this fastening system.
As illustrated in
The plate-like element 11 is in the mounted position with its upper free end 12 and its lower free end 13 connected to a fastening bracket 14, which is the upper bracket in the mounted position, and a fastening bracket 15, which is the lower bracket in the mounted position. The upper free end 12 and the lower free end 13 are connected to end plates 16 and 17. The end plates 16 and 17 are fitted without play in the lateral cheeks 18, 18a and 19, 19a of the fastening brackets 14 and 15.
The threaded piece 21 is constructed in this embodiment as a stud bolt. To be able to secure the wedge 20 and the end plate 16, a lug 22 extending over the cheeks is provided, wherein the lug is welded to the cheeks.
A welded seam 23 is provided on the threaded piece and the lug 22 as an additional connection.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2009 056 219 | Nov 2009 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2010/068087 | 11/24/2010 | WO | 00 | 5/8/2012 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2011/064233 | 6/3/2011 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4266758 | Schmitz | May 1981 | A |
| 6290901 | Laubach | Sep 2001 | B1 |
| 7662336 | Schubert et al. | Feb 2010 | B2 |
| 7871560 | Best et al. | Jan 2011 | B2 |
| Number | Date | Country |
|---|---|---|
| 1903685 | Feb 1971 | DE |
| 1603685 | Mar 1971 | DE |
| 1061138 | Dec 2000 | EP |
| 1061138 | Jan 2005 | EP |
| 2325446 | May 2008 | RU |
| 2008092488 | Aug 2008 | WO |
| Entry |
|---|
| Schmidt R: Stahl Und Eisen, Verlag Stahleisen, Dusseldorf, DE, Bd. 118, Nr. 8, Aug. 17, 1998. |
| Number | Date | Country | |
|---|---|---|---|
| 20120223107 A1 | Sep 2012 | US |
