DE4333717C1 - Apparatus for transferring and storing roughed strips rolled from thin slabs and wound up - Google Patents

Abstract

The invention relates to an apparatus, arranged on the exit side of a multi-strand thin-slab casting installation, for transferring and storing the roughed strips, rolled from the thin slabs and wound up, between a winding apparatus assigned to each cast strand and an unwinding device corresponding to the following finishing mill, the process of transfer involving a cross-transfer vehicle. Each coil (18) to be transferred is assigned a heatable heating hood (12) which is connected to the cross-transfer vehicle (5, 6) in such a way as to form an integral construction and which has doors which can be closed on both sides. <IMAGE>

Description

The invention relates to a multi-core thin slab caster Subordinate device for transporting and storing the from the Thin slabs rolled and wound pre-strips between each Casting strand associated with the winder subsequent finishing mill corresponding unwinding device using cross transport vehicles with cross on them slide-on bogie wagons, to which heating hoods are assigned.

Thin slab plants are increasingly used because they are much closer to the desired final dimensions of the hot-rolled strip Steel slabs with thicknesses between 40 and 80 mm smaller and enable more market-compatible systems for the production of hot-rolled strips, so that the investment costs for such systems are significantly reduced can be. Small system sizes also enable large ones Market flexibility with short order processing times.  

In the thin slab process, the thin slab is made with a typical Casting speed of 5 m / min continuously poured and immediately then rolled using the casting heat. Thereby result clearly in comparison to a conventional process reduced energy and conversion costs. The one for finish rolling required reheating after pouring is done either in gas-fired ovens, by means of inductive heating or in a Combination of both methods.

The thin slab plants work particularly economically when more than one casting strand is combined with one finishing train because the Investment costs of the entire system significantly through the cost of Finishing line are determined. A system setup with two or more Cast strands, however, means an extraordinarily large effort for the handling of the 40 to 60 m long thin slabs between the Casting machines, roughing mills and the only finishing train, for example by moving or swiveling roller hearth furnaces, the for thin slabs to be buffered or stored, a multiple of Slab length. Such furnaces increase the Investment costs also because of the additional required Facilities and the correspondingly large halls.

It is possible to roll thin slabs rolled to pre-strip into coils and wrap them using suitable means of transport (trolleys, cranes) Transport unwinding station in front of the finishing train. Such System is described in DE 41 21 489 A1. It consists of one arranged between the winding and unwinding device for the preliminary strip Furnace system for heat management and, if necessary, reheating the support strips and to save the bundles in case of malfunctions. For this the covenants routed through the furnace in cycles using a pallet circulation system Furnace entrance and exit transverse transport vehicles are arranged with which  the pallet wagons pushed across these transverse transport vehicles (Bogie) are movable. Are on the side of the stove Transport devices for returning the circulated Pallet truck provided. The known device is relative complex. Individual temperature control for the individual coils is not possible in the known furnace, so that for example a Individual re-heating of coils after a heating power failure Casting line is not possible.

The known furnace system with the pallet circulation system also requires a lot Space that is common, especially when converting existing systems or Integration of new thin slab caster in existing plants is not present.

Starting from DE 41 21 489 A1 and the system described there It is an object of the present invention to provide a device for transportation and storing cast in a multi-core thin slab caster and pre-rolled coils with which without complex and expensive Furnace technology two or more casting lines can be linked together can, with the waiving of space and investment Circulation system uniform and individual temperature conditions in the coils can be adjusted, the direction also can be subsequently integrated into existing systems.

To solve the problem, the present invention proposes that everyone transporting coil is associated with a heatable heat hood that is structurally connected to the transverse transport vehicle and on both sides of the cross transport vehicle with sliding doors as Passage for the bogie is provided.  

In departure from the proposal of the prior art, each is individual Coil with the bogie assigned to it under a heat hood transversely transported, which is individually heated, so that the temperature each coil can be adjusted to the corresponding needs. The Warming hoods are on both sides of the cross transport route lockable doors through which - after opening - the bogie are retractable and extendable with the coils. With this Cross transport device can move the coils without delay from the Winding be transported to the unwinding station, whereby at the same time, if necessary, the temperature compensation of the strip edges with the provided heaters can be made.

In the event of malfunctions there are to the side of the cross transport route heatable storage heaters to accommodate one each on a bogie overlying coils arranged with the cross transport car facing doors are provided, the one-sided open Warming hood of the transverse transport wagon driven next to the storage furnace the open storage furnace forms a closed furnace chamber. By This training will ensure that throughout Cross transport, during the buffering and during the The coils on the bogie wagon are always manipulated by Heat hoods remain covered, so that, despite the possible individual modular structure of the facility, secured temperature conditions in the Coil are adjustable. The number of the next to that Transverse route arranged storage furnaces arbitrarily and if necessary. expandable. The arrangement can be according to the locally available Space can be handled flexibly without the cheap Transport of the coils in protected furnaces is disrupted.  

According to another proposal of the invention it is provided that on a Transverse dolly several heatable heat hoods are arranged, the Doors can be operated independently. By this proposal the Invention, the storage furnaces are designed and the same as the heat hoods arranged on the cross transport wagon. Is a caching of Coils are required, however, some of the heat hoods are used for storage used at the same time for the transverse transport of the coils.

For moving the bogie wagons into and out of the heating hoods and / or Storage furnaces are provided according to another feature of the invention, that the bogie can be moved on rails across the transverse transport path are and can be driven by charging cylinders with the bogie can be coupled and uncoupled. After opening the doors you can open this way the bogie wagon quickly and precisely in the desired End positions combine, while the enclosure remains.

The heat hoods assigned to the transverse transport vehicle are preferably and / or the storage heaters can be electrically heated by resistance. During the The resistance heaters can be transported using trailing cables of the necessary energy.

In addition to this, it is proposed that the heat hoods be gas-fired Equip ceiling burners that do not heat and keep warm find bogie wagons with coils.

In a special embodiment of the invention it is provided that each winding station and / or the unwinding station one by one Heat hood is assigned to the covered transfer area on which the pushed buggies can be loaded and unloaded. In a training course the invention provides that the heat hood of the transfer place for Unwinding station and doors to be opened to the transverse transport vehicle  and cooperates with a manipulation device, by means of which the Heat hood together with the coil from the winding station and / or in the unwinding station is manipulable. That way ensures that even when transferring the coil from the Winding station on the bogie and when transporting the coils from The bogie wagon upright in the unwinding station to house the coils preserved.

The particular advantage of the invention is in the modular structure of the Facility to be seen with individual customization of the respective plant and the respective plant operation also can be subsequently integrated into existing systems. The overall system is compact in construction and inexpensive to invest because that there is no need for a complex circulation system for the bogie wagons.

An embodiment of the invention is shown in the drawing and is described below. It shows

Fig. 1 very schematically the device according to the invention for combining two cast strands,

Fig. 2 shows the arrangement according to Fig. 1 at three casting strands,

Fig. 3, the supply of a finishing train by two casting strands with Coilspeicherung on the transverse transport vehicle,

Fig. 4 shows the arrangement according to FIG. 3, in a three-strand casting plant

Fig. 5 shows a cross section through a transverse transport vehicle in the area of the unwinding and

Fig. 6 two storage ovens arranged on both sides of the transverse transport route.

In Fig. 1, the casting lines designated A and B are initially indicated in a rough schematic plan view of the overall system, each consisting of a known thin slab caster with a downstream roughing mill. In a winding station 1 and 2 behind each of the two casting plants, the preliminary strip is wound into coils and transferred to the transfer points 3 and 4 under a heat-insulating housing with the aid of a suitable manipulator. A bogie wagon, which cannot be seen in this illustration, is available on the transfer station, onto which the coil is placed and which can be moved on rails running transversely to the transverse transport device. A charging cylinder 31 , which is provided on the opposite side of the transverse transport device and which can be coupled to or uncoupled from the bogie wagon, serves as the drive.

The transverse transport device consists of the transverse transport vehicles 5 and 6 , which can be moved on rails 7 by means of drives, not shown. Each cross transport unit consists of the vehicle itself and heat hoods arranged on it, which - as will be explained later - are provided on both sides of the cross transport travel path with doors through which the bogie wagons can be moved in and out.

The coil moved onto the transverse transport vehicle 5, 6 when the door is open is, after closing the door facing the transfer location 3, 4, parked in alignment with the transfer location 8 in front of the unwinding station 9 . After opening of the transfer point 8 facing door of the heat hood of Chargierzylinders 81 of the bogie with the coil at the transfer station 8 is pushed with the aid of which, as explained later, also covered by a heat cap, the cross transport vehicle 5, 6 facing door derren open is. While the coil, together with the heat hood of the transfer station 8, is gripped by a manipulator and transferred to the unwinding station 9 , where the coil is unwound and the unwound end of the finishing train is fed, the doors are closed and the bogie wagon is pulled back onto the transverse transport vehicle 5, 6 . The transverse transport vehicle 5, 6 can then be moved back to the transfer location 3, 4 in front of the winding station.

In alternation with the operation of the casting line A, the casting line B is operated in the same way, so that the transverse transport car 5 and 6 are used alternately.

In the case of interference, the storage heaters are 10 aneordnet both sides of the Querverfahrweges, namely as close to the path of the transverse transport vehicles 5, 6, that after opening of the storage heaters 10 facing door of the heat cap of transverse transport vehicles and opening of the storage heaters 10 remains a closed furnace chamber in which the bogie can be implemented with the coil from the cross transport vehicle in the storage oven 10 . Depending on requirements, one or more storage ovens 10 can be fitted with bogie wagons and coils, each storage oven 10 being individually heatable. The resistance heater has the advantage over gas burners that a very uniform temperature distribution in the storage furnaces 10 and thus in the coil can be ensured. Bogie wagons can also be warmed up and kept warm in the storage ovens 10 without a coil, for which purpose the latter can be gas-heated.

Fig. 2 differs from Fig. 1 in that three casting strands A, B, C are provided, the middle casting strand B being arranged in line with the finishing mill indicated at D. As a result, the bogie wagons leaving the transfer station 11 can be transferred directly to the transfer station 8 of the unwinding device 9 with the doors of the heat hood of the transverse transport carriage 5 open on both sides, while the other rewinder devices are operated as described for FIG. 1. In both systems, the number of storage spaces is greater than that of the bogie wagons, which means that there is no need for a circulation system for the bogie wagons. To close the heating hood downwards, a dummy can be retracted to fill the space of the pushed out trolley.

FIG. 3 shows a similar mode of operation of the device according to the invention , the storage furnaces 10 being arranged on the transverse transport vehicles 5, 6 and being displaceable with them. The storage furnaces 10 do not differ from the heat hoods of the transverse transport vehicles 5, 6 according to FIG. 1. As a result, the storage furnaces 10 can be used either for transporting or storing the coils. This system is particularly small and is suitable when there is little space available.

In Fig. 4 the embodiment according to Fig. 3 is shown with a three-strand casting system A, B, C, the casting lines A and C are assigned their own transfer stations 3, 4 , which are served by a crane common to all transfer stations 3, 4 , the transfer the coils stored there to the transfer point of the casting strand B in a special heat hood assigned to the crane (immediately in front of the unwinding device 9 ).

Such a part of the system is designed approximately as shown in FIG. 5. There, the transverse transport vehicle 5 , which can be moved transversely on the rails, on which the heat hood 12 is placed. The charging cylinder 13 , which is coupled to the bogie carriage 15 at 14, can be seen on the left in FIG . The bogie carriage 15 can be extended on rails 16 , which run transversely to the rails 7 of the transverse transport vehicle 5 , for which purpose the door 17 arranged on the side of the heat hood 12 is opened, as shown. To transfer the bogie carriage 15 with the coil 18 , the door 12 of the heating hood 20 on the transfer station is also opened and closed again after the bogie carriage 15 has been retracted. With the help of the manipulation device 21 , which engages in the eye of the coil 18 , this is lifted together with the heat hood 20 attached to the manipulation device 21 and moved to the unwinding station by transverse movement of the trolley 22 . There, the coil 18 is lowered with the heat hood 20 so that the coil 18 comes to rest on the unwinding rollers 23 .

The storage furnaces 10 , which are shown in FIG. 6, are, as can be seen, arranged on both sides of the transverse travel path (rail 7 ) of the transverse transport vehicle 5 . The storage furnaces 10 are provided with resistance and gas-heated heating hoods 24 , the doors 25 of which can be raised and lowered. By lifting the doors 25 , with the help of the charging cylinder 13, the bogie carriage 15 can be moved on the transversely transport carriage 5 which has been inserted flush (not shown) and can be taken over by the heating hood 12 there. During the entire transport and when storing the coils 18 , they are always covered by heat hoods 12, 20, 24 , so that a favorable temperature control is possible through the entire device.

Claims (8)

1. A multi-strand thin-slab casting downstream means for transporting and storing the rolled from thin slabs and wound billets between each cast strand associated winding device and corresponding to the subsequent finishing mill unwinding device using transverse transport vehicles with transverse to this deferrable bogie, which heat hoods are associated, characterized characterized in that each coil ( 18 ) to be transported is assigned a heatable heat hood ( 12 ) which is connected to the transverse transport vehicle ( 5, 6 ) in terms of construction and on both sides of the transverse transport vehicle ( 5, 6 ) with lockable doors ( 17 ) as a passage for the Bogie ( 15 ) is provided. 2. Device according to claim 1, characterized in that laterally next to the transverse transport path (rails 7 ) heatable storage furnaces ( 10 ) for receiving one each on a bogie ( 15 ) lying coils ( 18 ) are arranged, which with the transverse transport vehicles ( 5, 6th ) facing doors (25) are provided, wherein the one-sided open warming cap (12) of the driven alongside the storage furnace (10) transverse transport vehicle (5, of the storage furnace (10) forms a closed furnace chamber having the open door (25) 6). 3. Device according to claim 1, characterized in that on a transverse transport vehicle ( 5, 6 ) a plurality of heatable heat hoods ( 12 ) are arranged, the doors ( 17 ) of which can be operated independently of one another. 4. Device according to claim 1-3, characterized in that the bogie ( 15 ) on rails ( 16 ) transverse to the transverse transport path (rails 7 ) and can be driven by charging cylinders ( 13 ) which are coupled to the bogie ( 15 ) and can be decoupled ( 14 ). 5. Device according to claim 1-4, characterized in that the transverse transport vehicle ( 5, 6 ) associated heat hoods ( 12 ) and / or the storage furnaces ( 10 ) are electrically resistance-heated. 6. Device according to claim 1-4, characterized in that the heating hoods ( 20, 24 ) are provided with gas-fired ceiling burners. 7. Device according to claims 1-6, characterized in that each winding station ( 1, 2 ) and / or the unwinding station ( 9 ) is assigned a transfer place ( 8 ) covered by a heat hood ( 20 ) on which the deferred bogie ( 15 ) is loaded and unloaded. 8. Device according to claim 7, characterized in that the heat hood ( 20 ) of the transfer station ( 8 ) to the unwinding station ( 9 ) and to the transverse transport vehicle ( 15 ) has doors ( 19 ) which can be opened and which interacts with a manipulation device ( 21 ) with which the heat hood ( 20 ) can be manipulated together with the coil ( 18 ) from the transfer station ( 8 ) into the unwinding station ( 9 ).