DE1232996B - Industrial furnace system for heating metallic goods - Google Patents

Description

Industrial furnace system for heating metallic goods The present The invention relates to an industrial furnace system for heating to be deformed hot metallic goods, such as blocks, slabs, billets, which are placed between two series-connected Deformation units for the material, in particular between two roller lines, arranged is.

It is seldom that the manufacturing capacity of two is mutually exclusive downstream, one and the same material processing deformation units for metallic goods, in particular the capacity of two roller mills connected in series is the same size. Rather, the throughput capacity differs from manufacturing or operational reasons. Often enough, for example, in a certain one Period of a few passes in the first roller train to achieve a certain cross-section of the material to produce, so the second roller train can often only one in the same period Process part of the material coming from the first street. This has its The reason is that a large number of stitches must be carried out to obtain the finished product is. On the other hand, the quantitative output of the first roller train can also be achieved as a result that these vary differently, namely once in narrow and once in large Raw material is supplied at regular intervals.

The object of the present invention is the usual, for intermediate heating Anyway, industrial furnace system arranged between two deformation units of the type outlined to be trained in such a way that they perform compensation functions with regard to the potential in varying order of magnitude from a first deformation unit arriving and exerts outgoing material quantity to a second deformation unit.

According to the invention, this object is achieved by a furnace system which is characterized by two known ones that are to be passed through one after the other by the property Pacemaker ovens (lift truck or walking beam ovens) with one in the area of product discharge of the first furnace and the material infeed of the second furnace, the material being charged at a distance Intermediate conveying means, whereby - in the direction of material flow - the first furnace by arrangement of stationary slideways and / or arrangement of push-in machines additionally according to Type of a likewise known pusher type furnace designed to be chargeable without good spacing is.

Can, for example, the second deformation unit over a certain The first furnace will take in less material than the first one the furnace system according to the invention with its pacemaker drive shut down driven in the manner of a pusher-type furnace with goods lying next to one another; the first The deformation unit is not impaired in its operation. the Step-by-step operation of the second furnace with goods passing through with constant goods spacing remains unchanged, because the intermediate funding provided according to the invention separates the adjacent goods and transfers them one by one from the hearth of the first the stove of the second oven. Are good delivery from the first and good reception of the second deformation unit, then the first furnace is also in pacemaker mode driven. While the second furnace is constantly by even charging one the same guarantees good heating of the product, the first furnace forms a storage tank, the task of which Effect and mode of operation in its range of variation with the above example is indicated. The invention is also of particular advantage when applied to Deformation units, which are connected to continuous casting plants, because with these the Raw material accumulates in spurts.

Although the invention is mainly intended that to create both ovens as a separate structural unit, so can in further training of the proposed invention, the material conveying device or the material supports of both ovens arranged together with the intermediate conveyor in a common furnace housing being.

The design of the first furnace as both a push and a pacemaker furnace expediently takes place in such a way that the slideways required for the pusher furnace at least on the stationary parts of the stationary and movable parts in a known manner Divide formed pacemaker foci arranged are. For loading of the first furnace in the manner of a pusher-type furnace is, according to the invention, an upstream of this, known material injection device with variable length stroke of the ram intended. In this way, one or more good pieces can be put into the oven at once be introduced.

Albeit as an intermediate means of funding between the two herds Ovens any conveying means is suitable that is able to individually from the goods To remove the hearth of the first oven and transfer it to the hearth of the second oven according to the proposals of the invention, a funding for this task in particular suitable, which is characterized as follows: The intermediate funding is between two ovens in the form of one held shorter than the distance between the oven hearths Carriage or carriage formed, the product support surface at the top of the stationary parts of the pacemaker foci runs and by at least a good width can be moved into this, with the carriage or slide being stationary, only in the direction of product conveyance Overridable pawls od Cart or sled a shift of the goods from one end of the wagon to the other cause. An intermediate funding device designed in this way is in use not limited to furnace systems that serve the purpose described, but can be used wherever goods move from a fixed support to a is to be handed over to another stationary support of the same height.

These and other features of the invention can be seen in the figures illustrated embodiments of the invention. It shows: F i g. 1 a Exemplary embodiment with two separate ovens, FIG. 2 an embodiment with a combined oven, FIG. 3 shows a cross section through a furnace, FIG. 4 to 9 different positions of an intermediate conveyor device and FIG. 10 one further embodiment of the invention.

In the embodiment of FIG. 1, the furnace system of the invention consists of two separate furnaces 1 and 2, in the case of that of FIG. 2 from an oven with oven parts 1 and 2; In all cases, this furnace system is located between streets 3 and 30. The arriving street 3 can be at the furnace system 1, 2 in FIG. 1 and 2 lead past to another furnace or furnace system; the line 30 leads to rolling stands in which the material passed through the furnace system 1, 2 is processed further or finished.

Both parts of the system 1 and 2 have a pacemaker or walking beam drive that are controlled independently of each other, but also synchronously with each other be able. These pacemaker drives consist of horizontally driven carriages 10 and 20, the wheels of which roll on rails 11 and 21 that can be raised and lowered. The drives these so-called lift trucks are not shown, but they can each with one be equipped with effective drive in the vertical or horizontal direction, for example with hydraulically actuated cylinders that act perpendicular to each other.

The pushing apparatus 31 is adjustable in its feed distance so that he pushes a good piece (Küppel) into furnace 1 once, in other cases at the same time Time several contiguous; the latter is advantageous in use of the plant part 1 as an insert furnace. Since this part of the system is used both as a warming and If the heating furnace is to work, it must be equipped with a correspondingly variable control being.

An intermediate conveyor 4 is arranged between furnaces 1 and 2, which should consist of at least two cars 4; go to for more details on this from FIGS. 4 to 9 and are described there. The travel distance of the Car 4 of FIG. 1 can be covered by a hood. The arrangement of such Carriage or lever according to FIG. 4 has, among other things, the advantage of being very lower Entrance and exit doors, so that the resulting heat loss even without a roof hardly comes into consideration.

In the embodiment of FIG. 2 are the funds 10, 11, 20, 21 and 4 housed in a single oven. It is a more advantageous embodiment of the invention than that of FIG. 1.

As can be seen from FIG. 3, the furnace or furnace part 1 is designed both as a pacemaker and as a pusher furnace, that is, the lateral product supports 12 have rails 120 on which the product can be displaced as in pusher furnaces. So that the carriage 10 or its drive or locking does not have to absorb any thrust forces, it is expedient to arrange the rails only on the stationary benches 2. The rails should be made of ceramic materials, i.e. not be cooled.

This F i g. 3 it can also be seen that across the furnace width only one lift truck is arranged, which has a relatively large width. These wide wagons are particularly advantageous because they are in contrast There are few slots to be sealed towards the walking beam ovens. But there are also other designs, for example walking beam ovens, within the meaning of the invention; at especially wide ovens can also have two or three pallet trucks arranged side by side which can be moved synchronously with one another and / or separately from one another.

The intermediate funds consist of carriages 4, one of which each is aligned with a fixed bank 12 or 22, so that during execution according to FIG. 3 two carriages 4 are arranged, between which the lift truck 10 moves can.

These cars can be moved in both directions on level 40. Pawl pairs 43 and 44 are pivotably articulated between the carriages at 41, 42 so that that they from their approximately perpendicular position counterclockwise through the property be pivoted, pivot back after passing the goods 7 and in the position shown are secured against pivoting clockwise, so that they lock the goods lying in front of them when the carriage 4 moves back.

The carriages 4 can therefore move into the recess 120 of the stationary banks 12 of the first pacemaker drive to remove a good piece 7 in order to take over the last good piece of the furnace 1 at the next cycle of the drive (FIG. 4). So they act as a fixed bench in pacemaker ovens. Then the wagons are moved to the left until the good piece? the first pair of pawls 43 has passed and this has been turned back into the vertical position (FIG. 5). Now the carriages 4 are shifted back again, the good piece 7 being stopped by the pawls 43 and pushed forward onto the carriage 4 after it comes to rest on these pawls after a short way back. The carriages 4 are pushed back so far that the item is pushed over the pair of pawls 44 during the next forward movement (FIGS. 6 and 7). The carriages 4 are then pushed back again so that the goods? lies at the end of the carriage 4 and is moved into the recesses 220 of the fixed benches 22 and removed there from the lifting carriage 20 (FIGS. 8 and 9).

Although the individual paths of the carriages 4 do not always need to be the same, it is nevertheless advantageous if they are, namely when the carriages 4 travel the entire distance between the drives 10, 20 each time, because otherwise the feed drive for the carriages is too complicated will.

The distances between the pawls 43, 44 and the banks 12, 22 are so preferably essentially the same and the distance of the reversing carriage 4 always the same; it corresponds to a real fraction of the distance between the banks 12, 22.

Depending on the process cycle, for example if the streets 3, 30 are the same, the cars in the position of FIG. 6 and 8 each take over a new good piece.

In the embodiment according to FIG. 10, the two furnace parts 1 and 2 are connected one behind the other in such a way that the two walking beam systems 10, 20 are parallel to one another, that is not one behind the other. This requires a different supply and discharge, but has the great advantage of relatively narrow ovens and consequently very simple lighting, which has a particularly positive effect on the ceiling construction.

The incoming line 3 is led into the furnace 1 so that, in contrast to the other versions, the material is moved into the furnace in the direction of its longitudinal axis. Transversely to this roller table part 8 - the roller table 80 is regarded as belonging to this in the sense of the invention, since both roller tables are in alignment - the walking beam system 10 is arranged, which takes over the goods; a transversely conveying pushing device, as in FIG. 1, can be provided in order to fulfill this task, but this is not absolutely necessary since the walking beams can move between the rollers 8 .

As such, these walking beams could transfer the goods to the roller table 9, but if this furnace part 1 is used both as a walking beam and a pusher-type furnace, it is advisable to provide a further intermediate conveying device 100 which stores the last good pieces at the start of batch loading and passes it on individually to the roller table 9, so otherwise the walking beams 10 would have to enter the roller table 9 at different distances or would have to perform intermediate steps in order to always be able to bring the last good pieces to the end of the benches 12 .

This intermediate conveying device also expediently consists of lifting beams 100 which are aligned with the beams 10 and which have the banks 12 in common. The rollers of the roller table 9 are expediently arranged between the walking beams so that they can move into the roller table. If there is no pushing device, the rollers of the roller tables 8, 80 are to be arranged in the same way.

The roller table 9 extends into the other part of the furnace 2 ; the walking beam system 20 removes the material from it and transports it to the roller table 80, through which it is extended.

The entire furnace system can be operated as follows: Assuming that the roughing stand or the incoming line 3 delivers the goods in batches, so that there are longer pauses between the individual deliveries, the furnace 1 or the furnace part 1 can be loaded in the manner of pusher furnaces. In these two cases, in the case of the explanations according to FIGS. 1 and 2 several good pieces are opened one after the other in front of the furnace 1 and pushed together by the pushing device 31 into the furnace. The goods that have already been pushed in are then pushed through the following goods in the furnace until the furnace is fully charged.

During this charging process, items 10 or 11 can be individually removed from the furnace 1 by means of the pacemaker drive and fed to the second furnace 2 via the intermediate conveying device 4. In the embodiment of FIG. 10, this task is performed by the conveying device 100. In this case, the furnace or furnace part 1 is kept at a temperature of about 900 ° C. as a holding furnace, that is, it is not regulated upward. It is emptied during the delivery break. It is reloaded towards the end of the emptying process. The furnace or Ofentei12 works as a heating furnace, the good pieces 7 are in it at a distance so that they can be heated on three sides.

If the cycle times between the lines 3 and 30 are the same, the furnace 1 can also be loaded in the same way as a pusher furnace in order to be able to act as a cushion or buffer in the event of malfunctions in the roughing stand. In this case, in particular, it is useful if the pacemaker drive of this furnace part can be operated with a greater cycle rate than that of the furnace part 2 , so that gaps in the load can be compensated, although the cycle sequence of the furnace 2 should also be variable.

As a rule, however, in cases of the same cycle on the streets 3, 30, both furnace or furnace parts 1 and 2 will be operated as a heating furnace, the furnace 1 may be loaded and deposited with a pusher 31, but at a distance, and the goods using the walking beam system 10 to move through the furnace 1 , which is regulated up to about 1000 to 1050 ° C. The material is then brought to 1250 ° C. in furnace 2.

Claims (6)

Claims: 1. Industrial furnace system for heating metallic goods to be hot-deformed, such as blocks, hums, billets, which is arranged between two deformation units for the goods connected in series, in particular between two roller lines, characterized by two known pacemaker ovens that are to be passed through by the goods one after the other ( 1, 2) lift truck or walking beam ovens) with an intermediate conveying means (4) which is provided in the area of the product discharge of the first (1) and the product inlet of the second furnace (2 ) and charges the goods at a distance, the first furnace (seen in the direction of product passage) ( 1) is equipped with stationary slideways (120) in the manner of a likewise known pusher furnace. 2. Industrial furnace according to claim 1, characterized in that the material conveying devices (10, 20) or product support of both ovens together with the intermediate conveyor (4) are arranged in a common furnace housing (FIG. 2). 3. Industrial furnace system according to claim 1 or 2, characterized in that the slideways (120) of the first Oven (1), which is designed both as a pacemaker and as a pusher oven, at least on the stationary parts (12) of the stationary and in a known manner Moving parts formed pacemaker foci are arranged. 4. Industrial furnace system according to one of claims 1 to 3, characterized in that the first furnace (1) upstream of a material injection device (31) with a variable length stroke of the ram is. 5. Industrial furnace system according to one of claims 1 to 4, characterized in that that the intermediate conveyor (4) between the two furnace in the form of a shorter than the distance between the oven hearths held carriages (4) or sledges is, the product support surface at the level of the upper edge of the stationary parts (12, 22) of the Pacemaker foci runs and can be moved into them by at least a width of one inch is, wherein the carriage or carriage (4) is stationary, can only be traversed in the direction of product conveyance Pawls (44, 43) or the like. Are assigned, which in a pendulum movement of the carriage or slide cause the goods to be shifted from one end of the wagon to the other. 6. Industrial furnace system according to one of claims 1 to 5, characterized in that the extent of the horizontal movement of the moving parts (10, 20) of the pacemaker foci of both ovens can be changed. Publications considered: German Patent No. 1006 877.