KR20080053358A - Tiltable metallurgical vessel - Google Patents

Abstract

In the case of a tiltable metallurgical vessel having a carrying ring (2) at least partially enclosing the metallurgical vessel at a distance therefrom, supporting brackets, which are fastened on the metallurgical vessel, rest on the carrying ring, and the metallurgical vessel is fixed in a releasable manner on the carrying ring by a plurality of clamping means (6, 5a, 6b) which can be actuated by pressure-medium cylinders (14), wherein each clamping means interacts with a locking bracket (7) fastened on the metallurgical vessel and the clamping means (6) is designed such that it can be moved from a release position (B), in which it releases the locking bracket, into a clamping position (A), in which it braces the locking bracket and is braced with the carrying ring, and vice versa. In order to allow for a secured connection between the carrying ring and metallurgical vessel in an easy-to-install manner, and using just a small number of components, it is proposed that the clamping means comprises at least one housing (8), a clamping anchor (9), a pivot lever (12) and a pressure-medium cylinder (14), which acts on the pivot lever, that the clamping anchor (9) is guided in a pivotable manner in a guide means (10) in the housing (8) and is articulated in a pivotable manner on the pivot lever (12), and that the pivot lever is supported in a pivotable manner in the housing.

Description

Tiltable metal container {TILTABLE METALLURGICAL VESSEL}

The present invention relates to a tiltable metal container having a carrying ring which at least partially surrounds the metal container at intervals, in which case the supporting bracket fixed to the metal container is Mounted on a carrying ring, said metal container is releasably fixed on the carrying ring by a number of clamping devices which can be actuated by a pressure medium cylinder, in which case each clamping device is locked to a metal container And the clamping device is configured to be movable from the release position of releasing the locking bracket to the clamping position of tightening the locking bracket and to the clamping position of the locking ring and vice versa.

The present invention relates to a clamping device for supporting and fixing the converter on a carrying ring which at least partially surrounds the converter which can be tilted in particular.

Metal containers of this type, mainly used in the manufacture and refining of steel melts in steel mills, are replacement containers which must be replaced at timed intervals in order to update the fire resistant lining or to perform other repairs on the lining. .

Metal containers that can be tilted like converters are exposed to high thermal loads by the metal melts processed in the containers and emit large amounts of heat to the surroundings by radiation. As such, in order to keep the thermal load of the support stand of the metal container small, the container is typically arranged in a carrying ring, which carrying ring is a closed annular welding structure or an open horseshoe. ) Shaped as a welded structure. The carrying ring can pivot about a horizontal axis and has a carrying pin supported in the support stand. The metal container may be arranged in a suspension manner in the carrying ring or on a carrying manner or supported in a support manner on the carrying ring. Such possible variants are described in detail in EP-B 0 029 878 B1, in which case the force between the carrying claw on the metal container and the carrying lug on the carrying ring The engagement state of the engagement method is maintained by the folding screw. By the compressive stressed folding screw, the lateral movement of the metal container is reliably avoided even when the container is tilted. However, manual dismantling of the folding screws does not only require significant time costs, but such manual dismantling operations are extremely difficult for managers in these areas due to thermal action, dust generation, the risk of tipping over and narrow space conditions. It can only be implemented at a high security cost.

In order to minimize the risk of accidents to the manager and to simplify assembly work, the fixing system has been improved. DE 102 51 964 A1, for example, is known for the rapid replacement and fixing of metal processing vessels on a carrying ring, in which the vessel brackets and the carrying ring brackets facing each other are secured to one another by means of folding connections. It can be tightened at and easily disassembled in the opposite operating direction (release position). In order to tighten and dismantle such a folding connection, a hydraulic control device to be installed manually is proposed, but the control device has not practically solved a problem in use which may pose a danger to the administrator.

In DE 25 11 610 A1 and EP 1 533 389 A1, the clamping process and the release process have already been carried out by means of hydraulic elements, which allows direct supervisors to dismantle the clamping elements in the carrying ring, which is very high above the workshop hallway. Embodiments of a clamping device are known which avoid the manner. In the embodiment according to FIG. 9 of DE 25 11 610 A1 and of FIGS. 4A and 4B of EP 1 533 389 A1, the clamping devices each have a pair of hooks, Thereby providing a compressive force that secures the converter in place on the carrying ring, the bracket engaging the converter behind the tongue in the shape of a tongue. The arrangement of the rods in the manner of the toggle lever mechanism ensures the automatic stop clamping position of the clamping device. The embodiments of the clamping device described in DE 25 11 610 A1 are much more complicated in their construction and require the operation of a continuous pressure medium cylinder, in which case the bearing bush- The locking member pivots to the clamping position, and in the second step the bearing bush-locking member is fixed by the overlapping tension rod. However, the last cited embodiment is not suitable for a particular place of use.

SUMMARY OF THE INVENTION The present invention aims to avoid the above disadvantages and difficulties, and an object of the present invention is to provide a thermal process and slag release between the manufacturing process of the connection part fastened between the metal container and the carrying ring and the opening operation of the connection part. A further embodiment of a tiltable metal container, which can be implemented with a minimum number of parts in a sufficiently protected atmosphere, is presented.

The object is, in accordance with the present invention, a clamping device comprising at least one housing, a clamping anchor, a pivot lever and a pressure medium cylinder acting on the pivot lever, the clamping anchor being pivotally operable in a guide means in the housing. Guided, pivotally connected on the pivot lever, and resolved by pivotally supporting the pivot lever inside the housing.

In a further preferred embodiment of the device according to the invention, the clamping anchor has a clamping head with a clamping anchor shaft and a support surface, the locking bracket having an insertion slot for receiving the clamping anchor shaft and the clamping head. And a corresponding support surface for the support, wherein in the clamping position the support surface of the clamping head is pressed towards the corresponding support surface of the locking bracket, and in the release position the clamping head is positioned outside the insertion slot to carry the carrying ring. Allowing the lifting operation of the metal container to be lifted from. This particular shape of the clamping anchor and locking bracket allows the center clamping power to act perpendicularly to the locking bracket and to run parallel to the converter axis even with a single clamping anchor that can pivot in and out. Is provided.

The clamping device forms or includes a toggle lever mechanism, the toggle lever mechanism generates an automatic stop action at one through point in the clamping position, and the movement path of the mechanism is preferably a stopper formed by the groove end of the guide means. By means of limitation, the advantages achieved in already known clamping devices are equally realized in the solution according to the invention which is structurally simple. However, in order to achieve the same effect, there is also the possibility of providing the stopper limiting the movement path to another place in the housing of the clamping device or in another way.

The clamping device is designed for high clamping power to ensure tight tightening, and such high clamping power takes into account the power and moment that occur when the metal container is tilted during the loading and unloading process. In order to be able to pass through the through lever of the toggle lever mechanism, it is necessary to assign an expansion element to the clamping device, since the usual tensile stress level is limited by the expansion element during the passage through the through point. Because. Preferably the expansion element is integrated into the clamping anchor. The expansion element preferably comprises a spring packet formed by a plurality of disk springs.

The clamping device is based on unusual kinematics. The kinematics is determined by placing a special guide means in the housing of the clamping device, so that in the first movement step the clamping head of the clamping anchor is lifted from the corresponding support surface on the locking bracket on the way from the clamping position to the release position. In one direction perpendicular to the corresponding support surface on the locking bracket, and in a further movement step the clamping head of the clamping anchor is moved from the area of the slot for insertion of the locking bracket mainly by pivoting motion. Will move out. The special first step of movement, which involves the lifting of the clamping head from the corresponding support surface on the locking bracket, is such that the action of the horizontal force exerted on the clamping device due to the horizontal movement of the clamping head associated with friction Avoided.

The guide means in the housing of the clamping device is formed by an arc-shaped guide groove in the longitudinal extension, in which the guide bolt of the clamping anchor is inserted and guided in such a way in the groove.

All parts of the clamping device are arranged in one common housing rather than an integrated part of the carrying ring, so that the clamping device forms a pre-assembled assembly that can be easily mounted to the corresponding wall member of the carrying ring. do. From this embodiment again the advantages for manager and facility availability arise, because in some cases each clamping device can be replaced in the shortest time when maintenance work is required.

Preferably, a compressed air cylinder is used for the operation of the clamping device.

The locking bracket is enclosed by a housing which opens in the direction of the carrying ring and the housing is fixed to the metal container, which is caused by slag release and steel release which occur, in particular, in the converter forming steel during the blowing step. In addition, damage to the clamping device caused by slag bars and metal bars falling from the converter inlet and in particular to damage to the pressure medium cylinder can be avoided. In addition, the moved parts of the pressure medium cylinder and the clamping device are housed in a protected state in the housing of the clamping device, and in some cases are further shielded by the components of the carrying ring.

Further advantages and features of the invention are obtained from the following description of one embodiment which does not limit the invention, in which case reference is made to the accompanying drawings.

1 is a schematic diagram of a converter corresponding to the prior art and supported in a carrying ring,

2 is a schematic cross-sectional view of the clamping device according to the present invention at an oblique cut between the clamping position and the release position, FIG.

3a is a schematic diagram showing an arrangement of a clamping device according to the invention disposed on a carrying ring with no converter vessel in the clamping position;

3b is a schematic view showing the arrangement of the clamping device according to the invention arranged on the carrying ring with the converter container not shown in the release position, FIG.

4 is a schematic illustration of the clamping device according to the invention in the clamping position, in the intermediate position and in the release position,

5 is a longitudinal sectional view of a clamping anchor with an expansion element,

6 is a detail view of the guide means.

1 schematically shows the basic structure of a converter device in a steel mill in a front view. The converter 1, consisting of a steel jacket and a fire resistant cladding not shown in the drawings, adjacent to the inside, is supported in a carrying ring 2 arranged at some distance from the converter. Thereby, the thermal load of the carrying ring is kept small by the hot converter vessel. The carrying ring 2, which is formed mostly as a horseshoe-shaped frame structure, is rotatably supported in one support stand 4 via two carrying pins 3a and 3b, and tilting not shown in the drawings. By providing a drive device, the converter can be adjusted to a vertical or inclined position for loading feed material, blowing raw steel or casting liquid steel. A number of brackets 5a, 5b are welded to the steel shell of the converter, by which the converter is mounted on a carrying ring 2 in a support not shown in detail in the drawings. By means of corresponding clamping devices 6a, 6b formed by threaded connections or formed by rods actuated by a pressure medium according to the prior art, the brackets 5a, 5b and together with the converter 1 It is fixed relative to the carrying ring 2 in a predetermined position, which position is also maintained in the tilted operating position of the converter.

The clamping device 6 according to the invention is shown, in one possible embodiment of FIG. 2, as an assembly pre-assembled in a mounting position for a locking bracket 7 welded to a converter not shown in the figure. The clamping device 6 comprises a housing 8 which consists of a plurality of steel plates and forms a frame for accommodating the individual parts of the clamping device 6 as a welding structure. One or more of the support plates 8a, 8b of the housing having a machined assembly surface allow the entire clamping device to be quickly assembled in various positions of the carrying ring 2 provided for this purpose ( 3a, 3b). On the two support plates 8c protruding vertically from the support plate 8a and positioned in parallel with each other, there are provided guide means 10 arranged to face each other, in which the clamping anchor 9 slides. Guided way. In this case, one guide bolt 11 of each of the clamping anchors 9, two of which are provided to face each other, is inserted into the groove of the guide means 10. One end of the pivot lever 12 is pivotally supported in a support bearing 13 in the support plate 8c. The pressure medium cylinder 14 formed as a compressed air cylinder is supported to be tilted in the bearing housing 15, which is likewise fixed to the support plate 8c. The piston rod 14a of the pressure medium cylinder 14 engages the wide end of the pivot lever 12 in the pivot joint 16. Preferably the clamping anchor 9 is pivotally supported in the pivot joint 17 at the center of the pivot lever 12. Thus, the operation of the clamping anchor 9 is clearly determined by the pivoting operation of the pivot lever 12 in the support bearing 13 and by the progression of the guide member 10. The clamping anchor 9 comprises a clamping anchor shaft 18 and a clamping head 19 at its end, which clamping head has a larger diameter than the clamping anchor shaft 18. In this way, a circular ring surface is formed which forms the support surface 20 on the lower surface of the clamping head 19, which cannot be seen in FIG. 2. By means of the clamping anchor shaft 18, the clamping anchor 9 penetrates the locking bracket 7, and the locking bracket is inserted into the U-shaped slot 21 in the through area of the clamping anchor shaft 18. Has A corresponding support surface 22 is formed in the edge region of the U-shaped insertion slot 21, in which case the support surface 20 and the corresponding support surface 22 are covered in the clamping position.

The clamping anchor 9 has an expansion element 26 shown in longitudinal section in FIG. 5. The clamping anchor shaft 18 consists of two parts: an upper clamping anchor shaft 18a supporting the clamping head 19 and a lower clamping anchor shaft 18b supported in the pivot joint 17. The upper clamping anchor shaft 18a is fixedly positioned in one housing 27a of the housing 27a, 27b consisting of two parts of the expansion element. The lower clamping anchor shaft 18b penetrates the bottom of the housing 27b to support the pressure disk 28. A disc spring packet 29 between the bottom of the housing 27b and the pressure disk 28 is inserted into one annular recess of the housing 27b. Two parts of the housing consisting of two parts are screwed together. By limiting the locking or release power to be provided by the pressure medium cylinder, the expansion element will pass through the penetration point of the kinematic system of the clamping device just before reaching the clamping position and in the first stage of the release process. Allowing the extension of the clamping anchor shaft 18 at this time allows passage of the through point.

The guide means 10 are assigned in opposite support plates 8c of the housing 8 of the clamping device. The guide means consists of a guide groove 30 that is substantially curved, and the guide bolt 11 is coupled in a sliding manner in the groove. The guide bolt 11 is connected to the clamping anchor 9 and is oriented perpendicular to the longitudinal axis of the clamping anchor and parallel to the pivot axis of the pivot joint 17. In the clamping position the guide bolt 11 is in its final position in the guide groove 30 as shown in FIG. 6. At this point the wall of the guide groove forms a stopper 31 which limits the clamping operation of the clamping device. In the case where the carrying ring is slightly twisted by thermal influences, the width of the grooves in the area is enlarged to make room for the guide bolts. The arc shape of the guide groove was chosen to achieve the optimal lifting and clamping action of the clamping anchor.

The carrying ring 2 in FIGS. 3 a and 3b has a centering device 24 which is essential for accommodating the converter and three obliquely cut clamping devices 6. In order to facilitate the overview of the figure, the converter container is only shown with a locking bracket 7. The figures show three centering devices 24, which are substantially displaced by 90 ° from one another and raised from the carrying plate of the carrying ring, on which the converter is centered in its position. Of the three clamping devices 6 distributedly arranged in a horseshoe-shaped carrying ring, one clamping device is connected to the end of the carrying ring at the front, and a further clamping device is centrally connected to the outer jacket face of the carrying ring. Position is set. The clamping devices are formed as a pre-assembled assembly and are mounted on a carrying ring by themselves. The pressure medium cylinder 14 is arranged on the lower surface of the carrying ring in a specially protected area. However, it is also possible to integrate the clamping devices into the structural structure in the carrying ring. 3a shows the clamping device in the clamping position A and FIG. 3b shows the clamping device in the release position B. FIG.

With reference to the two operating positions and one intermediate position of the clamping device, schematically illustrated in the subsequent figure in FIG. 4, the clamping process and the release process of the converter on the carrying ring are described in detail:

The figure above shows the clamping device 6 and the locking bracket 7 in the clamping position. The guide bolt 11 of the clamping anchor 9 is in the lower final position of the guide means 10 and the pressure medium cylinder 14 is in the final position provided for the clamping position. The positions have been determined such that the clamping engagement between the converter and the carrying ring can be released when pressure is applied to the pressure medium cylinder only to allow automatic stop of the kinematic system and after passing through the through point. In this case, the resistance provided by the disk spring packet of the expansion element must be overcome. The lifting operation of the clamping anchor which is lifted from the corresponding support surface of the locking bracket and in particular the lifting operation of the clamping head is mainly determined by the guide means. If the pressure medium cylinder is further operated, the lifting of the clamping head 19 is caused in the first actuating stage of the clamping anchor, mainly by an operation made in one direction away from the corresponding support surface vertically. In one further operating step, the clamping head is mainly transmitted with a pivoting motion. In this step, the clamping anchor reaches one position as shown in the middle figure among the continuous figures in this figure. If the pressure medium cylinder is further operated, the guide bolt 11 of the clamping anchor 9 moves to the upper end point of the guide means 10 and the pressure medium cylinder 14 corresponds to the release position of the clamping anchor. Reach the final position. In this position the entire clamping head is outside the insertion slot 21 of the locking bracket 7, as shown in the figure below in the series of figures in FIG. 4. In the release position the converter can be lifted from the carrying ring or inserted into the carrying ring. The clamping coupling of the inserted converter is done in the reverse order to the release process described above.

Claims (12)

A tiltable metal container, in particular a converter, having a carrying ring 2 which at least partially surrounds the metal container at intervals,  A support bracket fixed to the metal container is mounted on the carrying ring, and the metal container is mounted on the carrying ring by a plurality of clamping devices 6, 5a, 6b which can be actuated by a pressure medium cylinder 14. Fixed to dismantle, Each clamping device interacts with a locking bracket 7 fixed to a metal container, the clamping device 6 tightening the locking bracket from the release position B for releasing the locking bracket and tightening with the carrying ring. Is configured to be movable to the clamping position A and vice versa, For tiltable metal containers, especially converters, The clamping device comprises at least one housing 8, a clamping anchor 9, a pivot lever 12 and a pressure medium cylinder 14 acting on the pivot lever 12, The clamping anchor 9 is pivotally guided in the guide means 10 in the housing 8, pivotally connected on the pivot lever 12, The pivot lever is pivotally supported inside the housing, characterized in that Tilted metal container. The method of claim 1, The clamping anchor 9 has a clamping head 19 having a clamping anchor shaft 18 and a support surface 20, The locking bracket 7 has an insertion slot 21 for receiving the clamping anchor shaft 18 and a corresponding support surface 22 for supporting the clamping head, In the clamping position (A) the support surface of the clamping head is pressed towards the corresponding support surface of the locking bracket, and in the release position (B) the clamping head is positioned outside the insertion slot and lifted from the carrying ring. Characterized in that to allow the lifting operation of the metal container being raised, Tilted metal container. The method according to claim 1 or 2, The clamping device 6 forms or comprises a toggle lever mechanism, which toggle lever mechanism generates an automatic stop action at one through point in the clamping position A, and the movement path of the mechanism is a stopper 31. Characterized in that limited by Tilted metal container. The method of claim 3, wherein The stopper 31 is characterized in that formed by the guide means 10, Tilted metal container. The method according to any one of claims 1 to 4, Characterized in that the clamping device 6 is assigned an expansion element 26, Tilted metal container. The method of claim 5, wherein The expansion element 26 is characterized in that it is integrated into the clamping anchor 9, Tilted metal container. The method according to claim 5 or 6, The expansion element 26 is characterized in that formed by the disk spring packet 29, Tilted metal container. The method according to any one of claims 1 to 7, By being arranged in the housing 8 of the clamping device of the guide means 10, in the first moving step the clamping head 19 of the clamping anchor 9 is in the middle of the transition from the clamping position A to the release position B. It is lifted and moved from the corresponding support surface 22 on the locking bracket 7, and in a further movement step the clamping head 19 of the clamping anchor 9 is pivoted by the locking bracket 7. Characterized in that moving out from the area of the slot 21 for insertion of Tilted metal container. The method according to any one of claims 1 to 8, The guide means 10 in the housing of the clamping device is formed by an arc-shaped guide groove 30, and the guide bolt 11 of the clamping anchor 9 is inserted into the guide groove to slide in the groove. Characterized by being guided by Tilted metal container. The method according to any one of claims 1 to 9, The clamping device is formed as a pre-assembled assembly, characterized in that it is removably fixed on the carrying ring, Tilted metal container. The method according to any one of claims 1 to 10, Said pressure medium cylinder 14 is a compressed air cylinder, Tilted metal container. The method according to any one of claims 1 to 11, The locking bracket 7 is surrounded by a housing which opens in the direction of the carrying ring, which housing is fixed on a metal container, Tilted metal container.

Images