DE102010008292B4 - Transport device for slabs - Google Patents

Abstract

The invention relates to a transport device (1) for slabs (2), which is arranged between at least two casting machines (3, 4, 5) and at least one rolling mill (6), the transport device (1) having at least two linear and stationary conveyor sections (7 , 8, 9) on which a slab (2) can be conveyed in a conveying direction (F). In order to enable flexible transport of the slabs from the casting machines to the rolling mill, the invention provides that the transport device (1) further comprises: a first ferry element (10), which is between an intermediate position (11) between a first (7) and a second (8) stationary conveyor section and a first alignment position (12), in which it is aligned with the second (8) conveyor section, is arranged to be movable back and forth, a second ferry element (13) which is between the first alignment position (12), in which it is aligned with the second (8) conveyor section, and is arranged to be movable back and forth in an intermediate position (14) facing away from the first stationary conveyor section (7) and arranged next to the second stationary conveyor section (8), a third ferry element (15), which is arranged to move back and forth between a second alignment position (16), in which it is aligned with the first conveyor section (7), and an intermediate position (17) between the first (7) and the second (8) stationary conveyor section.

Description

The invention relates to a transport device for slabs, which is arranged between at least two casting machines and at least one rolling mill, the transport device having at least two linear and stationary conveying sections on which a slab can be conveyed in a conveying direction.

Transport devices with which slabs can be transported from at least two casting machines to a rolling mill are well known in the prior art. Various configurations of such devices are in the EP 0 845 308 B1 , in the EP 0 908 243 B1 , in the EP 0 908 244 B1 , in the EP 0 682 770 B1 , in the EP 1 127 628 A1 , in the EP 0 492 226 B1 , in the EP 0 593 002 B1 , in the DE 10 2005 011 254 B4 , in the EP 0 438 066 B1 , in the DE 195 24 082 B4 , in the DE 41 37 547 C2 , in the WO 2009/ 030 190 A1 , in the WO 03/ 039 775 A1 and in the WO 00/12 235 A1 described. These include solutions in which the slabs can be conveyed by pivoting elements in the manner of a switch, as well as devices that use ferry elements that are moved translationally in order to convey the slab.

It has proven to be a disadvantage that the flexibility of transferring slabs is sometimes limited. The throughput also does not always meet the demands of a highly productive production method.

The present invention is therefore based on the object of developing a transport device of the type mentioned in such a way that an increase in the flexibility of transport from the casting machines to the rolling mill can be achieved when using the device. Furthermore, it should be possible to increase the throughput of slabs through the device and thus increase the economic efficiency of the system.

• ein erstes Fährenelement, das zwischen einer Zwischenposition zwischen einem ersten und einem zweiten ortsfesten Förderabschnitt und einer ersten Fluchtungsposition, in der es mit dem zweiten Förderabschnitt fluchtet, hin und her beweglich angeordnet ist,
• ein zweites Fährenelement, das zwischen der ersten Fluchtungsposition, in der es mit dem zweiten Förderabschnitt fluchtet, und einer vom ersten ortsfesten Förderabschnitt abgewandten und neben dem zweiten ortsfesten Förderabschnitt angeordneten Zwischenposition hin und her beweglich angeordnet ist, und
• ein drittes Fährenelement, das zwischen einer zweiten Fluchtungsposition, in der es mit dem ersten Förderabschnitt fluchtet, und einer Zwischenposition zwischen dem ersten und dem zweiten ortsfesten Förderabschnitt hin und her beweglich angeordnet ist.

The solution to this problem by the invention is characterized in that the transport device of the type mentioned further comprises:

• a first ferry element which is arranged to be movable back and forth between an intermediate position between a first and a second stationary conveying section and a first alignment position in which it is aligned with the second conveying section,
• a second ferry element, which is arranged to move back and forth between the first alignment position, in which it is aligned with the second conveyor section, and an intermediate position facing away from the first stationary conveyor section and arranged next to the second stationary conveyor section, and
• a third ferry element which is arranged to be movable back and forth between a second alignment position in which it is aligned with the first conveying section and an intermediate position between the first and the second stationary conveying sections.

With this solution, a slab transfer can be carried out very advantageously from at least two casting machines to a rolling mill.

The transport device further preferably has a fourth ferry element, which is arranged to be movable back and forth between a third alignment position, in which it is aligned with a third stationary conveying section, and an intermediate position between the second and the third stationary conveying section. In this case, the slab transfer from three casting machines to a rolling mill can be carried out very advantageously.

Furthermore, a further stationary conveying section can be present, with which the first and second ferry elements can be brought into an alignment position. The further stationary conveying section is preferably arranged in alignment with the second conveying section.

All stationary conveying sections are preferably arranged parallel to one another. The ferry elements can also be arranged parallel to one another and movable in translation transversely to the conveying direction.

At least some of the ferry elements can advantageously be heated, with the ferry elements being provided in particular with oven elements, preferably in the form of tunnel ovens. It is preferably provided that at least some of the furnace elements can be heated independently of one another. The stationary conveyor sections can also be provided with oven elements in a corresponding manner.

The ferry elements are preferably designed to be movable, in particular displaceable, independently of one another.

A particularly compact and space-saving design of the device is achieved if it is further provided that the first and second ferry elements, viewed in the conveying direction, are arranged within the longitudinal extent of the first stationary conveying section and the third stationary conveying section, if present. The same applies if the third ferry element and the fourth ferry, if present element viewed in the conveying direction are arranged outside the longitudinal extent of the first stationary conveying section and the third stationary conveying section, if present.

The stationary conveyor sections are advantageously designed as roller table elements. At least some of the stationary conveyor sections can also be provided with thermal insulating elements. The thermal insulating elements can be closed in a thermally insulating manner in the end area.

At least some of the stationary conveyor sections can also be provided with descaling elements. Other special slab treatment facilities are also possible.

In a simple manner, rolling stock can be made from one strand, i.e. H. coming from a casting machine, are transferred to another strand.

The proposed solution also results in energy advantages: with certain types of steel (e.g. silicon steels) it may be necessary to operate at higher temperatures. Then the temperature of predetermined ovens with which the relevant conveyor sections are provided can be increased. This temperature increase can only be provided for a part of the conveying sections. The conveying sections that do not convey slabs of the relevant steel grade can be kept at the standard temperature.

The independent mobility of the ferry elements and their independent heating have a very advantageous effect. The movement is preferably translational transverse to the conveying direction, but is not necessarily limited to this. In the case of three casting strands, the ferry elements collect the continuously cast product from the two external casting strands and direct it to the rolling train. Furthermore, the device can also be used to pass the continuously cast product from the middle casting machine to the rolling mill.

It is also possible to temporarily stop some of the conveyor sections, e.g. B. for maintenance purposes. The transport device can still continue to convey slabs to a certain extent. This also results in an easier option, for example, replacing conveyor rollers.

The invention can be used on all casting and rolling systems that are equipped with more than one casting machine. In general, transport can take place from one strand to another. The design of tunnel kilns can thus be carried out in an improved manner.

The capacity of the entire system (throughput) and the buffer times of tunnel kilns can be increased according to the invention. The advantageous flexibility already arises with two strands (casting machines), but is preferably effective with three strands. The buffer times and the logistical flexibility of tunnel kilns are increased accordingly. This results in a more flexible way of operating parallel ferries, which already has an effect on two, but especially on three, lines.

Several slabs can be conveyed in the ferry area at the same time on the proposed transport device. This avoids the bottleneck that often arises from the ferry, especially in high-production facilities (annual tonnage of more than three million tons). Rather, slabs can be conveyed from a secondary line into the ferry and onto the main line at the same time.

This means that overall a significant increase in the production capacity of the entire system can be achieved. Pivoting the ferry elements is generally not necessary for this.

With the same overall length of the system as in a classic parallel ferry system, the buffer capacity of the furnaces with the proposed concept is advantageously higher.

• 1 schematisch in der Draufsicht eine Transportvorrichtung, mit der Brammen von drei Gießmaschinen zu einem Walzwerk gefördert werden können, wobei ein erster Prozessstatus dargestellt ist,
• 2 die Darstellung gemäß 1 in einem zweiten Prozessstatus zu einem etwas späteren Zeitpunkt,
• 3 die Darstellung gemäß 1 in einem dritten Prozessstatus zu einem noch etwas späteren Zeitpunkt,
• 4 die Darstellung gemäß 1 in einem vierten Prozessstatus zu einem noch etwas späteren Zeitpunkt und
• 5 die Darstellung gemäß 1 in einem fünften Prozessstatus zu einem noch etwas späteren Zeitpunkt.

An exemplary embodiment of the invention is shown in the drawing. Show it:

• 1 a schematic top view of a transport device with which slabs can be conveyed from three casting machines to a rolling mill, with a first process status being shown,
• 2 according to the representation 1 in a second process status at a slightly later point in time,
• 3 according to the representation 1 in a third process status at a somewhat later point in time,
• 4 according to the representation 1 in a fourth process status at a somewhat later date and
• 5 according to the representation 1 in a fifth process status at a somewhat later date.

The figures show a transport device 1 in various, successive process stages, with which slabs 2 are conveyed from a total of three casting machines 3, 4 and 5 to a hot rolling mill 6. There is a (main) conveying direction F. The present invention is Can also be used with just two or more than three casting machines. This also applies to the number of rolling mills, although in the exemplary embodiment there is only one.

The cast slabs 2 are in 1 conveyed from above (from the casting machines 3, 4, 5) downwards (to the rolling mill 6). For this purpose, the transport device 1 points in 1 The area shown above has three stationary linear conveyor sections 7, 8 and 9, which in the present case are arranged parallel to one another; However, it is also possible for the conveying sections 7, 8, 9 not to run parallel, but rather at an angle to one another.

In the position shown of the individual conveying sections shown, it is possible for slabs 2 of the middle casting machine 4 to be conveyed linearly and directly - coming from the stationary conveying section 8 - to the rolling mill 6 without reversing direction. The conveyance to the rolling mill 6 always takes place via a stationary conveyor section 21.

Meanwhile, the slabs are transported from the two laterally arranged conveyor sections 7 and 9 by reversing the direction of the slabs 2 twice.

• Ein erstes Fährenelement 10 ist vorgesehen, das zwischen einer Zwischenposition 11 zwischen dem ersten und dem zweiten ortsfesten Förderabschnitt 7 bzw. 8 und einer ersten Fluchtungsposition 12 translatorisch hin und her beweglich angeordnet ist, wobei das erste Fährenelement 10 in der Fluchtungsposition 12 mit dem zweiten Förderabschnitt 8 fluchtet.

For this purpose, in addition to the stationary conveying sections 7, 8, 9 and the also stationary conveying section 21, the following ferry elements are provided:

• A first ferry element 10 is provided, which is arranged to be movable back and forth in translation between an intermediate position 11 between the first and the second stationary conveying section 7 or 8 and a first alignment position 12, the first ferry element 10 being in the alignment position 12 with the second conveying section 8 is aligned.

Furthermore, a second ferry element 13 is provided, which is located between the first alignment position 12, in which it is aligned with the second conveyor section 8, and an intermediate position 14 (see in this regard) which faces away from the first stationary conveyor section 7 and is arranged next to the second stationary conveyor section 8 3 ) is arranged to move back and forth translationally.

Then there is a third ferry element 15, which is between a second alignment position 16 (see 3 ), in which it is aligned with the first conveyor section 7, and is arranged in an intermediate position 17 between the first and the second stationary conveyor sections 7, 8 so that it can move back and forth in translation.

Finally, a fourth ferry element 18 is provided, which is arranged to be movable back and forth in translation between a third alignment position 19, in which it is aligned with a third stationary conveying section 9, and an intermediate position 20 between the second and third stationary conveying sections 8, 9.

All translational movements of the ferry elements 10, 13, 15, 18 take place transversely to the conveying direction F.

With the four ferry elements 10, 13, 15, 18 mentioned, slabs 2 from all three casting machines 3, 4, 5 can be guided from the three conveyor sections 7, 8, 9 to the rolling mill 6, to which they are fed via the stationary conveyor section 21 .

In 1 is shown for a first process status, how slabs can be conveyed directly and without reversing direction into the conveying section 21 via the conveying section 8 and the ferry element 13 which is in alignment with it.

The slab 2-1 is according to 1 conveyed into the rolling mill 6, while the slab 2-2 arrives in the conveying direction F from the ferry element 13 into the conveying section 21 (see 1 and 2 ). From the casting machine 4, another slab 2-3 arrives in the conveying section 8.

Meanwhile (according to 1 and 2 ) a slab 2-4 coming from the casting machine 3 via the conveying section 7 and conveyed via the ferry element 15 into the ferry element 10 after reversing direction (see status according to 1 and 2 ). By moving laterally transversely to the conveying direction F of the two ferry elements 10 and 13 (compare 2 and 3 ), the ferry element 10 reaches the alignment position 12 with the conveying section 8, so that as a result (see Fig. 4 ) the slab 2-4 can be conveyed to the rolling mill 6 via the conveying section 21.

As can be seen from the comparison 1 and 2 on the one hand with the 3 and 4 On the other hand, it can be seen that the ferry element 15 has been moved back to the left into the alignment position 16, so that a new slab 2-5 can be picked up by the conveying section 7. This slab 2-5 is then moved further to the right on the ferry element 15 into the intermediate position 17 (see Fig. 5 ) in order to then move in the manner explained via the ferry element 10 into the alignment position 12 and in this into the conveying section 21, for which it undergoes a two-fold reversal of direction.

Analogously, the slab 2-6 arrives from the casting machine 5 via the conveyor element 9 Ferry element 18 (see 1 ) and further after translational transverse displacement to the intermediate position 20 (see. 3 ). After reversing direction, the slab 2-6 moves onto the ferry element 13 (see. 4 ), which is then moved transversely to the conveying direction F into the alignment position 12 (see. 5 ). From there, the slabs 2-6 travel via the conveyor section 21 into the rolling mill 6.

The various traversing movements can sometimes take place in parallel, resulting in an economically advantageous process.

The slab can be transported in a short time with a minimum number of transport phases. Accordingly, the throughput of the system is higher than with conventional systems.

In addition, the flexibility of the transport system is high, especially when parts of the system are not needed and are shut down. The advantage is that individual casting machines can be stopped temporarily without any problem. The slab transport can be continued in an efficient and flexible manner.

Each conveyor section and each ferry element can be heated separately with an oven (not shown), with tunnel ovens being preferred. Induction heaters are also preferred.

In all conveyor sections, special devices can optionally be integrated that serve for descaling, targeted oxidation or surface treatment of the slab.

List of reference symbols:

1

Transport device

2

Bram

3

Casting machine

4

Casting machine

5

Casting machine

6

rolling mill

7

stationary conveyor section

8th

stationary conveyor section

9

stationary conveyor section

10

first ferry element

11

Intermediate position

12

first alignment position

13

second ferry element

14

Intermediate position

15

third ferry element

16

second alignment position

17

Intermediate position

18

fourth ferry element

19

third alignment position

20

Intermediate position

21

stationary conveyor section

F

Direction of conveyance

Claims (10)

Transport device (1) for slabs (2), which is arranged between at least two casting machines (3, 4, 5) and at least one rolling mill (6), the transport device (1) having at least two linear and stationary conveyor sections (7, 8, 9 ) on which a slab (2) can be conveyed in a conveying direction (F), characterized in that the transport device (1) further comprises: a first ferry element (10) which is between an intermediate position (11) between a first ( 7) and a second (8) stationary conveyor section and a first alignment position (12), in which it is aligned with the second (8) conveyor section, is arranged to be movable back and forth, a second ferry element (13) which is between the first alignment position ( 12), in which it is aligned with the second (8) conveyor section, and an intermediate position (14) facing away from the first stationary conveyor section (7) and arranged next to the second stationary conveyor section (8) is arranged to be movable back and forth, and a third ferry element (15), which is arranged to move back and forth between a second alignment position (16), in which it is aligned with the first conveyor section (7), and an intermediate position (17) between the first (7) and the second (8) stationary conveyor section is. Transport device after Claim 1 , characterized in that it further comprises a fourth ferry element (18) which is between a third alignment position (19), in which it is aligned with a third stationary conveyor section (9), and an intermediate position (20) between the second (8) and the third (9) stationary conveyor section is arranged to move back and forth. Transport device after Claim 1 or 2 , characterized in that there is a further stationary conveying section (21) with which the first and second ferry elements (10, 13) can be brought into an alignment position. Transport device Claim 3 , characterized in that the further location fixed conveyor section (21) is arranged in alignment with the second conveyor section (8). Transport device according to one of the Claims 1 until 4 , characterized in that all stationary conveying sections (7, 8, 9) are arranged parallel to one another. Transport device according to one of the Claims 1 until 5 , characterized in that the ferry elements (10, 13, 15, 18) are arranged parallel to one another and are arranged to be movable in translation transversely to the conveying direction (F). Transport device according to one of the Claims 1 until 6 , characterized in that at least some of the ferry elements (10, 13, 15, 18) are heatable, the ferry elements (10, 13, 15, 18) being provided in particular with oven elements, preferably in the form of tunnel ovens. Transport device according to one of the Claims 1 until 7 , characterized in that the ferry elements (10, 13, 15, 18) are designed to be movable, in particular displaceable, independently of one another. Transport device according to one of the Claims 1 until 8th , characterized in that the first and second ferry elements (10, 13), viewed in the conveying direction (F), are arranged within the longitudinal extent of the first stationary conveying section (7) and the third stationary conveying section (9), if present. Transport device according to one of the Claims 1 until 9 , characterized in that the third ferry element (15) and the fourth ferry element (18), if present, are arranged outside the longitudinal extent of the first stationary conveyor section (7) and the third stationary conveyor section (9), if present, when viewed in the conveying direction (F).

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