EP3074149B1 - Device for increasing the temperature of elongated metallic rolled stock and production line for producing and/or working elongeated metallic rolled stock - Google Patents

Description

The invention relates to a device for increasing the temperature of elongated metallic rolling stock with a heating device comprising induction heating elements for heating the rolling stock along a heating section and with a conveyor comprising driver and / or roller table elements as active or passive conveyor elements for moving the rolling stock in the longitudinal direction of the heating section, wherein the Induction heating in the longitudinal direction of the heating section are each arranged spaced apart by a free space.

The invention further relates to a finishing train for producing and / or processing elongate metallic rolling stock with a device for increasing the temperature of the elongated metallic rolling stock.

In particular, generic devices are well known in the art to heat elongated metallic stock, such as ribbons, slabs, or the like, as desired. In this case, the elongate metallic rolling stock often has to pass through a series of induction heating elements with a relatively narrowly selected induction heating element throughput height, in order to be able to pass as close as possible to the induction heating elements, whereby the highest possible efficiency with respect to the heating device can be achieved. This is especially true when thinner tapes are to be heated with a thickness of for example 8 mm to 30 mm by means of a longitudinal field induction heating. It is known that - seen in the conveying direction - in front of a corresponding Induktionsheizelementestrecke, short heating section, any bumps, bulges and / or bandskis with respect to the elongated metallic rolling material with a band straightening machine or a leveler and / or can be reduced by means of a Schopfschnittes on the tape head. However, depending on the prevailing constraints of the particular device, bumps, bandskis or the like may still be present. In addition, a curvature of the elongate metallic rolling material can also change or increase within a longer, for example, 3 m long, Induktionsheizelementestrecke about as a result of uneven heating or asymmetric temperature losses from top to bottom of the elongated metallic rolling stock. Furthermore, in the event of a malfunction in downstream units, mass flow disturbances, a power failure during rolling conveyance or the like, a belt loop may form in the area of the induction heating element section.

These effects, explained by way of example only, may cause the elongate metallic rolling stock to come into contact with one or more of the induction heating elements and the heating device to be permanently damaged.

In order to reduce the risk of contact between the elongate metal rolling and the induction heating elements within a Induktionsheizelementestrecke, is from the document CA 2 633 942 C a device comprising a band edge heating with induction heating known, which are arranged on both sides of a central longitudinal line of a heating section of the device. Both before and after the induction heating components of a leveler for leveling the rolling stock are placed. These components are additionally connected to each other with an elongate middle part of the leveler, so that the leveler extends along the entire Induktionsheizelementestrecke consistently from an input area in front of the induction heating element distance to an exit area behind the Induktionsheizelementestrecke. By means of this leveler thus constructed, the rolling stock can be further leveled during the heating of its edge areas. However, the device is quite large because of the consistently designed leveler. In addition, by means of the leveler designed in this way, in particular for thinner rolled goods, such as thinner belts or the like, it can not be ruled out that side portions of the thinner rolling stock still come into contact with the induction heating elements in spite of the central component, with a corresponding deformation. In this respect, the device shown in the cited document is in no way suitable for increasing the temperature of thinner rolled products by means of a longitudinal field induction. Moreover, this leveler adversely affects the heating of the rolling stock, since the elongated center component is arranged in the middle of the heating section. Thus, this center component is disadvantageously also exposed to a tremendous heat. Due to the position of the elongated middle part of the leveler, this construction is also suitable only in conjunction with a bank edge heating. When flat from one side to the other side continuous induction heating can from the document CA 2 633 942 C known levelers are not even used.

Furthermore, from the Japanese abstract JP 11 123 438 A another hot rolling plant is known, which has an induction heater with a plurality of induction heating coils for heating an elongate metallic rolling stock. The elongate metallic rolling stock is hereby conveyed in the transport direction through the respective gap of the induction heating coil. In order to eliminate the risk that the elongated metallic rolling material inadvertently abuts against the inner sides of the induction heating coils, two or more tubular elements are respectively arranged between each of the induction heating coils and the upper side and the lower side of the elongate metallic rolling stock. The tube elements arranged in each induction heating coil on the top and bottom side of the elongate metallic rolling stock extend with respect to their longitudinal extent in the transport direction of the elongate metallic rolling stock and are arranged next to one another at a distance from one another transversely to the transport direction. The tubular elements are in this case bent in a U-shape and facing away from the respective induction heating coil with their ends. Coolant connections are provided at the ends since a coolant flows through the tube elements in order to cool them. This is also imperative since they are are placed in the region of the induction field between the inner sides of the induction heating coils and the elongate metallic rolling stock. Thus, they are directly exposed to a corresponding heat load. It is also disadvantageous that as a result the heating power of the induction device is adversely affected. Furthermore, the inductor throughput is additionally reduced by the tube elements.
In addition, from the EP 0 810 044 A1 in particular a device for the production of hot-rolled steel sheet is known, wherein the devices comprises heating means, between which side guides are arranged to guide a rough bar laterally.
From the EP 1 707 282 A1 Another device for producing steel sheets with induction heating units is known, wherein between the induction heating units Niederhalterollen and / or drive rollers are arranged, by means of which the steel sheets are guided between the induction heating.
The WO 2007/077701 A1 discloses a device for increasing the temperature of elongated metallic rolling stock with a heating device comprising induction heating elements for heating the rolling stock along a heating path. Furthermore, the device comprises a conveyor device comprising driver and / or roller table roller elements as active or passive conveyor elements for moving the rolling stock in the longitudinal extent of the heating section. The induction heating elements in the longitudinal extent of the heating section are each spaced from each other by a free space, wherein in the free space each Abweisergleitelement is arranged to prevent contact of the conveyed rolling with the induction heating. The preamble of claim 1 is based on WO 2007/077701 A1 , The invention has the object of further developing devices for heating elongate metallic rolling stock, in particular of thinner metallic strips, such as thin steel strips, that the risk of contact and possible damage in particular of induction heating by an elongate metallic rolling material can be flatly avoided ,

The object of the invention is achieved by the subject matter of claim 1. In particular, such positioned between two arranged in the longitudinal extent of the heating line induction heating Abweisergleitelement the actual heating is free of interfering components, which in particular a surface heating of the elongated metallic rolling stock and effective heating due to a minimum passage dimension is ensured in the heating. Nevertheless, the danger is particularly prevented that the elongate metallic rolling material accidentally collides with one of the induction heating elements during its conveyance through the heating section, for example on a hot strip mill. Conveniently, especially the tape transport of thinner tapes or the like through the heating distance is made safer.

The same applies if the device comprises side guide elements, which are located in the free space and are arranged between two directly adjacent induction heating elements. By means of such arranged side guide elements a side guide of the conveyed rolling material is guaranteed across the heating well. The leadership option is then interrupted only by the induction heaters.

Furthermore, it is claimed that the Abweisergleitelemente and the induction heating along the heating path are arranged alternately to each other. By this alternate arrangement can be ensured that - seen in the conveying direction or in the longitudinal extent of the heating - both before and after the respective induction heating a Abweisergleitelement is arranged, whereby the protection of the individual induction heating can be further improved.

Due to the fact that the Abweisergleitelement are preferably arranged completely in the respective space between two induction heating elements, the Abweisergleitelement advantageously not adversely affect the heating power of the induction heating elements acting on the rolling stock, since the Abweisergleitelement arranged next to the induction heating and not between these and the rolling stock are. In this respect, the Abweisergleitelement are arranged outside a corresponding heating surface of the respective induction heating.

The term "complete" in the sense of the invention describes that, in particular with the rolling stock interacting Abweisergleitflächen or other relevant areas of the Abweisergleitelements are arranged within a range of the free spaces between the induction heating.

Thus, it is advantageous if the Abweisergleitelement are arranged outside of the rolling stock facing surfaces of the induction heating.

In this respect, the device according to the invention can be operated much more reliable than was previously possible in the prior art. Overall, as a result, a rolling mill can be operated more safely, thereby enabling the output performance can be increased even at a corresponding finishing line for the production of elongated metallic rolling.

In the present case, the free spaces and the induction heating elements are arranged alternately with respect to one another in the longitudinal extent of the heating path, so they are arranged alternately with respect to one another.

The object is also achieved by a finishing train for producing and / or processing elongated metallic rolling stock with a device for increasing the temperature of the elongate metallic rolling stock, wherein the finishing train comprises a device for increasing the temperature of elongate metallic rolling stock according to one of the features described herein.

Specifically, when the finishing train includes a continuous casting mill, a trouble due to a problem in the area of a heating path of the temperature increasing device may bring the whole production to a standstill, for example, a cast break in endless rolling of belts. In this respect, it is advantageous if the present device is used in connection with such a continuous casting rolling mill.

The term "elongate metallic rolling stock" herein describes metal or steel strips produced by hot rolling or metal or metal sheets, slabs, casting strands or the like, which are to be subjected to a temperature increase for further processing.

For such a temperature increase, the device has a heating device with a large number of induction heating elements, preferably longitudinal field induction heaters. Thus, the term "heating device" especially also preferably refers to a longitudinal field induction heating, which in the context of the invention is used on the device according to the invention. The device according to the invention is thus particularly suitable for increasing the temperature of elongate metallic rolling stock having a rolling stock thickness of greater than 6 mm.

The term "Abweisergleitelement" describes in the context of the invention, any elements with which it is possible to keep the subsidized rolling stock spaced from the induction heating, without by a motor drive or by the movement of the rolling a significant proper motion, such as a rotational movement, to accomplish.

In this respect, the Abweisergleitelement is characterized in particular by the fact that it is preferably completely fixed and rotatably designed compared to the conveyed rolling, especially if the subsidized rolling material comes into operative contact with the Abweisergleitelement when this is moved through the heating section in the conveying direction or promoted. In this respect, the deflector elements has a braking effect on the movement of the rolling stock.

From this Abweisergleitelement the active or passive conveying elements of the conveyor differ in that these conveying elements favor the movement of the rolling stock through the heating section through and even initiate. Thus, the active conveying elements comprise approximately motor-driven driver roller elements, by means of which the rolling stock can be accelerated. The passive conveyor elements, however, comprise approximately roller table roller elements on which the rolling stock can roll.

A preferred alternative embodiment provides that the Abweisergleitelement is disposed between one of the active or passive conveying elements and one of the induction heating. Here, the Abweisergleitelement is preferably at the height of the driver and / or roller table elements and the induction heating such that the elongated metallic material not only particularly well kept away from the individual induction heating, but also the active or passive conveying elements, if present, advantageously supplied can be.

It is understood that the Abweisergleitelement can be designed diverse. However, it is particularly advantageous if the Abweisergleitelement comprises a relation to the subsidized rolling solid fixed Abweiserkopfteil. With this Abweiserkopfteil the Abweisergleitelement only partially protrude into the heating system.

The Abweisergleitelement or the relevant Abweiserkopfteil may inter alia consist of a deformation-resistant plate member or a plurality of plate elements.

Or the Abweisergleitelement or the relevant Abweiserkopfteil can be designed in the form of at least one narrow rib member. If a plurality of rib elements are provided, thermal insulation panels or mats can be arranged between the individual rib elements, whereby advantageously two functions can be fulfilled, namely, on the one hand, a deflector sliding element and, on the other hand, a thermal insulation unit.

It can also be made of a temperature resistant material.

Preferably, at least this Abweiserkopfteil is liquid-cooled inside, so that it is better protected against critical heating by the radiant heat, for example, a heated slab or hot sheet or the like.

A coolant supply, in particular a settable deflector head part is preferably carried out by means of a flexible hose connection.

Furthermore, it is extremely advantageous if the Abweisergleitelement includes a ramp with a ramp, so that the rolling can be deflected better in the intended conveying plane.

The respective induction heating element can be particularly well protected against collision with the rolling stock when the Abweisergleitelement is arranged with its long side transverse to the longitudinal extent of the heating in the free space.

It is particularly expedient if the Abweisergieitetement more than 60%, preferably more than 90%, is arranged extending over the Heizstreckenbreite.

In this case, the Abweisergleitelement thus extends transversely to the heating section or transversely to the longitudinal extent of the heating section.

If the Abweisergleitelement arranged in above and / or below a conveying plane of the heating space between two directly adjacent induction heating, the rolling stock can be performed both over upper Induktionsheizelementbereichen and against lower Induktionsheizelementbereichen advantageous through the heating.

Moreover, it is also advantageous if at least two Abweisergleitelemente Abweisergleitelemente - with respect to the heating section - are arranged vertically opposite one another. By such an arrangement, the top and bottom induction heating elements can be particularly well protected against mechanical damage.

Often also a roller table roller element on the bottom and a Abweisergleitelement on the top between two induction heaters face each other.

Furthermore, it is advantageous if a plurality of deflector units consisting of vertically opposing deflector sliding elements configure a height-limiting device running along the longitudinal extent of the heating section. By this height limiting device, the passage height of the heating section can be particularly well limited, so that both the upper and the lower Induktionsheizelementbereiche are very well protected against mechanical damage.

Further, it is advantageous if at least two Abweisergleitelemente are arranged as Abweisereinheit - with respect to the heating section - opposite roller table roller elements.

A further preferred arrangement also provides that the Abweisergleitelemente and the induction heating along the heating section are arranged alternately to each other. By this alternating arrangement can be ensured that - in the conveying direction or in the longitudinal direction of the It is understood that the position of Abweisergleitelements opposite the nearest induction heater can be chosen differently. However, it has been found that the position of the Abweisergleitelements is set particularly advantageous when the device by a horizontal _distance A _Hori between Abweisergleitelement and an immediately adjacent induction heating _element , an induction heating _{element spacing} A _INDHori and _{Abweisergleitelementebreite} B, where A _Hori = ½ × ( A _INDHori - B) = (0 to 25%) × A _INDHori is.

In particular, it has proved to be advantageous if, in particular, the lower conveying element is arranged at a distance of less than 100 mm, preferably less than 40 mm, from the closest induction heating element or the nearest induction heating elements in the transporting direction.

A collision of the rolling stock with one of the induction heating elements can moreover be prevented even better if the apparatus is characterized by an induction heating _{element passage height} H _IND and a vertical _distance A _VertA or A _VertF between an upper deflecting _{sliding element} and a lower deflecting _{sliding element} or a lower conveying element, where A _VertA or A _vertF ≤ H _IND .

It has furthermore proven to be positive if, at an induction heating element _{passage height} H _IND <200 mm, preferably <80 mm, at least one deflector sliding element is arranged in one of the free spaces. As a result, resulting or existing bumps can be better rejected on the rolling stock.

Moreover, it is advantageous if the device is characterized by a difference Δx between an induction heating element passage height H _IND and a rolling stock thickness h with Δx = H _IND -h ≤ 125 mm.

Also, a ratio V of a rolling stock thickness h to an induction heating element passage height H _IND with V = (h / H _IND ) ≦ 0.5 or preferably V = (h / H _IND ) ≦ 0.25 is advantageous.

In particular, the structural design of the present device can be further simplified if the Abweisergleitelement comprises a driver and / or roller table roller element.

Furthermore, it is advantageous if the Abweisergleitelement height adjustable relative to a conveying plane of the heating and / or relative to the induction heating is displaced.

Advantageously, the apparatus may additionally be characterized by a horizontal _distance A _Horis between a side guide _element and an immediately adjacent induction _heater , an induction _{heater passage width} B _IND and a side guide _{passage width} B _F , where A _HoriS = ½ × (B _IND -B _F ) = ( _0-25 %) ) × B _IND is.

Furthermore, it is very advantageous if a plurality of side guide units consisting of horizontally opposite side guide elements form a width limiting device running along the longitudinal extent of the heating section. By this width-limiting device, the passage width of the heating section can be particularly well limited, so that the rolling stock is well guided laterally within the conveyor plane.

The width of the guide is ideally set slightly narrower than a width inside dimension of an induction heating element, preferably smaller than or equal to 100 mm.

Furthermore, it is advantageous if the side guide elements are fixed firmly in a maximum position. Or the Binneninnenmaß can preferably be set in groups, depending on the Walzgutbreite.

The side guide elements can also be made uncooled from a temperature-resistant material beyond. Or they are internally cooled.

It is understood that the present Abweisergleitelemente or deflector units and the side guide elements or side guide units can be designed together or individually constructively varied.

An extraordinarily secure guidance through the heating section and past the induction heating elements can be ensured if a deflector unit consisting of at least two vertically opposing deflector sliding elements and / or a lateral guide unit consisting of two horizontally opposed lateral guide elements jointly or in each case at least partially configures a rolling stock inlet funnel. Incidentally, the same also applies with regard to a guide comprising at least one Abweisergleitelement and a vertically opposite roller table roller element.

In this case, the deflector unit and a side guide unit corresponding to this deflector unit can form an overall unit or else can be constructed separately for themselves.

It should be mentioned at this point that, in connection with the heating device used in the present device, different types of induction heating elements can be used, in particular those in a closed or open construction.

In closed-type induction heating elements, the elongated metallic material must generally be transported through an opening of a rectangular-ring-shaped, rigid frame of the induction heating element. So that the rolling stock can easily penetrate into the opening of this frame, the tape head of the rolling stock is scooped up beforehand and / or the rolling stock is guided by an independent band straightening machine consisting of, for example, three to five straightening rollers. Before and within the heating section are above and optionally below the Abweisergleitelemente and / or arranged on both sides of the heating additional side guide elements between preferably each induction heating to thereby make the transport through the heating section through reliable. This measure is almost a Tunnel formed, the top, bottom and possibly also laterally tarnishing the rolling stock to the induction heaters or other components or even snagging on the induction heaters well prevented. Abweisergleitelemente and side guide elements on the one hand and induction heating on the other so alternate in their arrangement in the direction of the longitudinal extension of the heating section. Cumulatively or alternatively to the Abweisergleitelementen also conveyor elements could be arranged before and / or between the individual induction heating, thereby improving the propulsion of the rolling through the heating section and / or rejection, holding down or centering of the rolling in particular in the field of open spaces to enable.

On the other hand, split and preferably adjustable induction heating elements can be used in open design, which consist of two halves, in particular a lower part and an upper part, which can embrace the rolling C-shaped. The corresponding longitudinal electromagnetic field is generated here by the spatially separated Induktionsheizelementhälften. The respective return of the current takes place on one side of the rolling stock within a closed housing. Split induction heaters have the advantage over closed induction heaters that the induction heater passage height is adjustable. That is, the upper and lower induction heater halves and upper and lower parts, respectively, of an induction heater are physically moveable with respect to each other. In this embodiment, for example, can be easily dispensed with a leveler or a band straightening machine or a cropping shear before the heating, or the transport safety is further increased when using all measures. This is especially true when it is a heater with induction heating in a continuous casting, in which the tape head length is very small compared to the entire endless belt length. In this case, the band head must be guided through the heating section, and this can advantageously be achieved by further opening the induction heating elements in the region of the current band head position in order to pass a ski, a band curvature or the like. Subsequently, especially if a corresponding strip tension in the range of Heating section is constructed, the individual induction heaters closed again, set to operating position and then activated. In this longitudinal field inductor principle, the Induktionsheizelementedurchungs- height can be set very narrow, whereby the efficiency of the induction heating elements and thus the entire acting on the rolling stock heating power can be advantageously increased. In addition, there is the certainty that in case of malfunctions or Walzgutauslenkungen of any kind, the corresponding induction heating can be driven, so that it can be better protected from further mechanical damage by the contact with the rolling stock. Before and in particular within the heating section are additionally above and optionally below the Abweisergleitelemente and optionally additionally arranged on both sides of the side guide between preferably each of the existing induction heaters so as to make the transport through the heating particularly safe and above, below and laterally snagging or Avoid tarnishing of the rolling stock on one of the induction heating. It is particularly advantageous if the induction heating elements can be opened wide in the event of a fault. This can be accomplished, for example, that approximately the upper induction heating element halves can be completely lifted or swung up. Cumulatively or alternatively, the induction heating elements can be moved laterally translationally transverse to the longitudinal extent of the heating section.

It is understood that the Abweisergleitelemente, but also the additional side guide elements can be integrated or supported almost anywhere in the present device. For example, the Abweisergleitelemente and the induction heating can be attached to a common support frame. As a result, they are ideally height adjustable together, laterally arranged transversely to the longitudinal extent of the heating displaced or wegschwenkbar. Alternatively, a separate adjustment of the position of Abweisergleitelemente, the side guide elements and the induction heating is possible. Moreover, it is also conceivable that the Abweisergleitelemente occupy a fixed position, ie are arranged stationary in the device, in which case only the induction heating are adjustable accordingly.

In this respect, in particular the deflector sliding elements can be arranged in a stationary, stepwise or continuously height-adjustable manner.

Thus, it is advantageous if the Abweisergleitelemente are arranged vertically adjustable.

It is expedient here if the Abweisergleitelemente alone or in a frame are arranged vertically adjustable together with adjustable induction heating.

The Abweisergleitelemente, but also the side guide elements may advantageously be formed of ferritic or preferably austenitic material, such as a stainless steel, a nickel-based alloy, a chromium-nickel-iron alloy, but also of refractory concrete, ceramic or the like ,

Therefore, it is advantageous if the Abweisergleitelemente are made of a temperature-resistant material and / or internally cooled, wherein a coolant supply of a cooled Abweisergleitelements having a hose connection.

A hose connection can structurally easily realize a flexible connection with respect to vertically height-adjustable deflector elements.

Furthermore, it is advantageous if the Abweisergleitelemente and the side guide elements are electrically isolated from the other metallic components. Or other measures are taken to interrupt an induced circuit.

Preferably, not only the Abweisergleitelemente and possibly also the side guide elements may be liquid-cooled inside, but also the other conveying elements, such as Treibererrollen-, Rollgangsrollen- and also Niederhalterollenelemente.

Moreover, it is advantageous if the device immediately comprises a straightening device for straightening the rolling stock. However, such a straightening device can also advantageously be dispensed with if the heating device comprises divided induction heating elements.

The Abweisergleitelemente, but also the side guide elements may advantageously be formed of ferritic or preferably austenitic material, such as a stainless steel, a nickel-based alloy, a chromium-nickel-iron alloy, but also of refractory concrete, ceramic or the like ,

Therefore, it is advantageous if the Abweisergleitelemente are made of a temperature-resistant material and / or internally cooled, wherein a coolant supply of a cooled Abweisergleitelements having a hose connection.

A hose connection can structurally easily realize a flexible connection with respect to vertically height-adjustable deflector elements.

Furthermore, it is advantageous if the Abweisergleitelemente and the side guide elements are electrically isolated from the other metallic components. Or other measures are taken to interrupt an induced circuit.

Preferably, not only the Abweisergleitelemente and possibly also the side guide elements may be liquid-cooled inside, but also the other conveying elements, such as Treibererrollen-, Rollgangsrollen- and also Niederhalterollenelemente.

Moreover, it is advantageous if the device immediately comprises a straightening device for straightening the rolling stock. However, such a straightening device can also advantageously be dispensed with if the heating device comprises divided induction heating elements.

Advantageously, with the present device, an unintentional contact between the elongated metallic rolling stock and the induction heating elements can always be reliably avoided, regardless of the design of the induction heating elements.

In addition, the risk of general damage to the elongate metallic rolling stock is particularly well reduced, such as a sticking of the elongated metallic rolling stock already at the tape head within the heating section.

Further advantages, objects and features of the present invention will be explained with reference to the accompanying drawings and the following description, in which an example of a device for increasing the temperature with induction heating elements and with respect to the subsidized rolling immovable Abweisergleitelementen, which are arranged in arranged by successively arranged along a heating induction heating free spaces represented and described.

Components which in the individual figures at least substantially coincide with respect to their function may in this case be identified by the same reference symbols, the components not having to be numbered and explained in all the figures.

Figur 1

schematisch eine Seitenansicht einer Temperaturerhöhungsvorrichtung mit entlang einer Heizstrecke hintereinander angeordneten und ring förmig geschlossenen, einteiligen Induktionsheizelementen und mit dazwischen angeordneten Abweisergleitelementen;

Figur 2

schematisch eine Querschnittsansicht der Vorrichtung aus der Figur 1 mit zusätzlich angebrachten Seitenführungselementen;

Figur 3

schematisch eine Seitenansicht der Temperaturerhöhungsvorrichtung aus den Figuren 1 und 2 mit entlang einer Heizstrecke hintereinander angeordneten und zweigeteilten und damit alternativen Induktionsheizelementen (Stromrückführung innerhalb der jeweiligen Induktorhälfe);

Figur 4

schematisch eine Querschnittsansicht der Vorrichtung aus der Figur 3; und

Figur 5

schematisch eine beispielhafte Aufsicht einer im Zusammenhang mit der Temperaturerhöhungsvorrichtung aus den Figuren 1 bis 4 möglichen Heizstrecke mit hintereinander angeordneten Induktionsheizelementen und mit dazwischen angeordneten Abweisergleitelementen und Seitenführungselementen.

In the drawing show:

FIG. 1

schematically shows a side view of a temperature increase device along a heating line arranged one behind the other and ring-shaped closed, one-piece induction heating and arranged therewith Abweisergleitelementen;

FIG. 2

schematically a cross-sectional view of the device of the FIG. 1 with additionally attached lateral guide elements;

FIG. 3

schematically a side view of the temperature increasing device of the FIGS. 1 and 2 with successively arranged along a heating section and divided into two and thus alternative induction heating elements (current feedback within the respective Induktorhälfe);

FIG. 4

schematically a cross-sectional view of the device of the FIG. 3 ; and

FIG. 5

schematically an exemplary plan view of one in connection with the temperature increasing device of the FIGS. 1 to 4 possible heating section with successively arranged induction heating elements and arranged therebetween Abweisergleitelementen and side guide elements.

The in the FIGS. 1 and 2 1 for increasing the temperature of elongate metallic rolling stock 2 comprises a heating device 3 which comprises a total of four induction heating elements 4, 5, 6 and 7. The four induction heating elements 4 to 7 are arranged one behind the other along a heating section 8 of the heating device 3, or in other words in the longitudinal extension 9 of the heating section 8, so that with the totality of the four induction heating elements 4, 5, 6 and 7 a longitudinal field induction heating (not separately stated here) ) is established. The four induction heating elements 4, 5, 6 and 7 are arranged on the device 1 in such a way that they are spaced apart along the heating path 8 by a horizontal _distance A _INDHori , whereby a corresponding front free space 10 between the two induction heating _elements 4 and 5, between the two Inductionheizelementen 5 and 6, a corresponding intermediate free space 11 and between the two induction heating 6 and 7, finally, a corresponding rear clearance 12 results.

Furthermore, the apparatus 1 has a conveying device 15, by means of which the elongate metallic rolling stock 2 is moved in a horizontally oriented conveying plane 16 in the conveying direction 17 through the heating path 8 and accordingly past the induction heating elements 4 to 7. The conveyor 15 is equipped in this embodiment, both with active and with passive conveyor elements 18 (only exemplified).

As active conveying elements 18, in the present case, driver roller elements 19 and 20 of a front drive unit 21 are provided at the input area 22 of the heating section 8 and at the output area 23 of the heating section 8 a lower driver roller element 24 and a hold-down roller element 25 of a rear driver unit 26 are provided.

As passive conveying elements 18, two roller table roller elements 27 and 28 are provided below the conveying plane 16.

The four induction heating elements 4 to 7 are in this embodiment in each case designed in a closed design, that is, with a rectangular ring-shaped housing part 30 (see in particular FIG. 2 ) with a fixed Walzgutdurchgangöffnung 31. This means that an upper part 32 and a lower part 33 of the respective induction heating 4, 5, 6 and 7 are arranged fixed to each other and thus rigidly connected together.

Thus, the moving in the conveying direction 17 through the heating section 8 optionally curved rolling 2 still reliable contactless through the fixed Walzgutdurchgangöffnungen 31 of the four induction heating 4, 5, 6 and 7 promoted and not just with the upper and lower parts 32 or 33 of the four induction heaters 4, 5, 6 and 7 come into mechanical contact, the device 1 a plurality of opposite the conveyed rolling stock 2 fixedly arranged Abweisergleitelementen 34, 35, 36, 37, 38, 39, 40 and 41, which in the free spaces 10 and 11 are arranged between the induction heating elements 4, 5 and 6 and cumulatively or alternatively between the active or passive conveying elements 18 and these induction heating elements 4, 5 and 6, respectively.

The Abweisergleitelemente 34 and 35, 36 and 37 and 38, and respectively 39 and 40 and 41 are vertically and vertically formulated respectively a deflector (not explicitly numbered).

Thus, the Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40, 41 of the respective deflector unit and the induction heating 4, 5, 6, 7 along the heating section 8 alternately to each other or arranged alternately one behind the other.

The Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40 and 41 are each characterized by a plate-like Abweiserkopfteil 42 (only exemplified), which are arranged closer to the conveying plane 16 as the induction heating 4 to 7. This alone reduces the risk that the rolling stock 2 abuts this induction heating 4 to 7.

The respective plate-like Abweiserkopfteil 42 Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40 and 41 has a ramp 43 (also numbered only as an example) with a ramp 26, which is aligned opposite to the conveying direction 17.

The ramp 43 and the conveying plane 16 ideally enclose an angle of, for example, more than 5 ° or more than 10 °. This means that the run-on slope 44 and the conveying plane 16 are arranged at an angle to one another and not parallel to one another.

In this respect, at least two vertically opposing Abweisergleitelemente 34 and 35, and 36 and 38, and 39 and 41 with their Abweiserkopfteilen 42 always a funnel-shaped inlet region 45 (front deflector unit), 46 (middle deflector unit) and 47 (rear deflector unit), so that subsidized rolling stock 2 can be advantageously deflected by the equipped with the ramps 43 Abweisergleitelementen 34, 35, 36, 37, 38, 39, 40 and 41, when it is moved in the conveying direction 17 along the heating section 8.

A tilting or snagging of the moving in the conveying direction 17 rolled material 2 on one of the conveying plane 16 facing edge 48 of Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40 and 41 is avoided in that at least a starting portion 49 of the ramp 43 in vertical Direction 50 behind the Induktionsheizelementen 4, 5, 6 and 7 is behind or at least at the same height with one of the conveying plane 16 facing inside 51 of the induction heating 4, 5, 6 and 7 respectively.

In other words, this means that the conveying plane 16 facing edge 48 of the respective Abweisergleitelements 34 to 41 is arranged farther away from the conveying plane 16 as the respective inner side 51 of the induction heating 4, 5, 6 and 7 respectively.

This reduces the risk that the rolling stock 2 further bends or bends due to mechanical contact with one of the Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40 or 41 and thereby creates a loop or the like within the heating section 8.

As in particular from the illustration according to the FIG. 2 can be seen well, the Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40 and 41 extend with their respective long side 55 transverse to the longitudinal extent 9 of the heating section. 8

The respective Abweisergleitelement 34, 35, 36, 37, 38, 39, 40 or 41 in this case extends almost over the entire Heizstreckenbreite 56 of the device 1, so that transversely to the longitudinal extent 9 of the heating section 8 is a very good and reliable surface guide of the rolling material. 2 is guaranteed.

In this embodiment, the Abweisergleitelemente 34, 35, 36, 37, 38, 39, 40, 41 and at least their respective Abweiserkopfteil 42 are designed liquid-cooled. This is illustrated by the exemplified and numbered coolant lines 57, 58 and 59.

Furthermore, the device 1 is characterized by a horizontal distance A _Hori (only shown by way of example) between the Abweisergleitelementen 34, 35, 36, 37, 38, 39, 40 and 41 and one of the immediately adjacent induction heating elements 4, 5, 6, 7, an induction heating _{element spacing} A _INDHori and a deflecting _{sliding element width} B, which are in relation to one another: $${\mathrm{A}}_{\mathrm{Hori}}=\mathrm{½}\times \left({\mathrm{A}}_{\mathrm{INDHori}}-\mathrm{B}\right)=\left(0\mathrm{to}25\%\right)\times {\mathrm{A}}_{\mathrm{INDHori}}\mathrm{is}{\mathrm{,\; A}}_{\mathrm{Hori}}\mathrm{is\; less\; than\; 40\; mm\; in\; this\; embodiment.}$$

Also, the device 1 is characterized by an induction heating _{element passage height} H _IND and a vertical _distance A _VertA between an upper deflector _{slide element} 35 or 38 or 41 and a lower deflector _{slide element} 34, or 36 and 37, or 39 and 40 or by a further vertical _distance A _VertF between an upper deflector _{slide element} 38 or 41 and one of the lower conveyor elements 27 and 28, respectively, where A _VertA or A _{VertF ≦} H _IND . H _IND is less than 80 mm in this embodiment.

Not only a collision-free vertical guidance of the rolling stock 2 with respect to the induction heating 4 to 7 can be ensured, but also a lateral horizontal guiding, since the device 1 in addition to already described above and below the conveying plane 16 arranged Abweisergleitelementen 34, 35, 36, 37, 38, 39, 40, 41 also still lateral guide elements 60 and 61 (here only exemplified), which are respectively disposed within the free spaces 10, 11 or 12 between two immediately adjacent induction heating 4 and 5 and 5 and 6, as in particular the representation according to the FIG. 5 is clearly recognizable.

In each case two directly opposite side guide elements 60 and 61 together form a side guide unit, wherein then a plurality of lateral guide elements 60 and 61 existing side guide units extend along the longitudinal extension 9 of the heating section 8 extending width limiting device.

The two side guide elements 60, 61 are aligned with their respective longitudinal side 63 (see FIG. 5 ) with the longitudinal extension 9 of the heating section 8, wherein the side guide elements 60 and 61 are arranged with respect to their longitudinal side 63 completely in the respective free space 10, 11 or 12 between the induction heating 4, 5, 6 and 7. Also, the side guide members 60 and 61 have a side ramp 64 with a casserole side slope 65, the initial region 66 in the horizontal direction 67 behind the induction heating 4, 5, 6 or 7 or at least at the same level with one of the heating section 8 facing side 68 of the induction heating 4, 5, 6 or 7.

In this respect, this results in a total of three Walzguteinlauftricher (not explicitly numbered), by a consisting of at least two vertically opposing Abweisergleitelemente 34 and 35 (front Walzguteinlauftrichter) or 36 and 38 (middle Walzguteinlauftrichter) or 39 and 41 (rear Walzguteinlauftrichter) deflection unit and additionally realized in each case by a lateral guide unit consisting of two horizontally opposite lateral guide elements 60, 61.

In any case, the device 1 is characterized by a horizontal _distance A _Horis between the side guide _element 60 and 61 and an immediately adjacent induction _heater 4, 5, 6 and 7, an induction _{heater passage width} B _IND and a side guide _{element passage width} B _F which are seen in the following relation to one another are: A _HoriS = ½ × (B _IND -B _F ) = ( _0-25 %) × B _IND .

The two side guide elements 60 and 61 each define an effective usable Heizstreckenbreite B _eff , which is smaller than the inner dimension B _{IND of} the induction heating 4 to 7, as shown in the representation of FIG. 5 is shown.

Since in particular in this embodiment, in particular, the Induktionsheizelementedurchgangshöhe H _IND fix is predetermined and can not be set, the device 1 is still equipped with a conventional leveler 70 comprising five straightening rollers 71 (only exemplified), which is placed in front of the actual heating section 8. By means of the leveler 70, the elongate metallic rolling stock 2 is leveled in a manner known per se before it reaches the front drive unit 21.

A second embodiment is in the Figures 3 and 4 illustrated, in the following essentially only the features will be explained by which this second embodiment of the first embodiment (see. FIGS. 1 and 2 ) is different.

Alternatively, in the in the Figures 3 and 4 shown device 1 on such a leveler 70 are well dispensed with when the heater 3 is equipped with other induction heating elements 104, 105, 106 and 107 in an open design. That is, each of the induction heaters 104, 105, 106 and 107 has a top 32 and a bottom 33 which can be displaced relative to each other so that the induction heater _{passage height} H _IND can be variably set.

For this purpose, the induction heating elements 4 to 7 are mounted in a frame of the device 1, not shown here, so that their upper and lower parts 32 and 33 can independently perform vertical movements according to the vertical arrows 72 (numbered only as an example).

Furthermore, at least the upper Abweisergleitelemente 35, 38, 41 and 73 also independently of each other vertical movements according to the other vertical arrows 74 (only exemplified), so that these compared to the lower Abweisergleitelementen 34, 36, 37, 39 and 40 and with respect to the Rollgangsrollenelementen 27th and 28 are height adjustable. The induction heating elements 104 to 107 can be moved laterally according to the direction of the arrow 75 and the upper Abweisergleitelemente 35, 38, 41 and 73 can be moved laterally according to the direction of the arrow 76 independently.

It should be explicitly pointed out at this point that the features of the solutions described above or in the claims and / or figures can optionally also be combined in order to be able to implement or achieve the explained features, effects and advantages in a cumulative manner.

It goes without saying that the exemplary embodiments explained above are only first embodiments of the device according to the invention. In this respect, the embodiment of the invention is not limited to these embodiments.

LIST OF REFERENCE NUMBERS

1

device

2

rolling

3

heater

4

first induction heating element

5

second induction heating element

6

third induction heating element

7

fourth induction heating element

8th

heating section

9

longitudinal extension

10

front clearance

11

medium free space

12

rear clearance

15

Conveyor

16

conveying plane

17

conveying direction

18

active or passive conveying elements

19

lower driver roller element

20

Upper driver roller element

21

front driver unit

22

entrance area

23

output range

24

lower rear driver roller element or roller table element

25

Down roller element

26

rear driver unit

27

front roller table element

28

rear roller table roller element

30

rectangular ring-shaped housing part

31

fixed rolling passage opening

32

lower part

33

top

34

first deflector sliding element

35

second deflector sliding element

36

third deflecting sliding element

37

fourth deflector slip element

38

fifth deflector sliding element

39

sixth deflecting sliding element

40

seventh deflector slip element

41

Eighth deflector sliding element

42

Abweiserkopfteil

43

ramp

44

approach ramp

45

front funnel-shaped inlet area

46

middle funnel-shaped inlet area

47

rear funnel-shaped inlet area

48

edge

49

initial region

50

vertical direction

51

inside

55

long side

56

Heizstreckenbreite

57

first coolant line

58

second coolant line

59

further coolant line

60

left side guide element

61

right lateral guide element

63

long side

64

side ramp

65

Leading side chamfer

66

initial region

67

horizontal direction

68

page

70

Leveler

71

straightening rollers

72

vertical arrows

73

ninth deflection deflector

74

more vertical arrows

75

arrow

76

arrow

104

another first induction heating element

105

another second induction heating element

106

another third induction heating element

107

another fourth induction heating element

A _Hori

Horizontal distance

A _INDHori

Induction heaters distance

B

Abweiserelementebreite

A _VertA

Vertical distance upper deflector element / lower deflector element

A _vert

further vertical distance Abweiserelement / conveying element

H _IND

Induction heating elements headroom

A _horis

Horizontal distance

B _F

Side guides passage width

V

relationship

H

rolling stock thickness

B _eff

bandwidth

B _IND

Induction heating passage width

Claims (19)

1. Device (1) for increasing the temperature of elongate metallic rolling material (2), with a heating device (3) comprising induction heating elements (4, 5, 6, 7; 104, 105, 106, 107) for heating the rolling material (2) along a heating path (8) and with a conveyor device (15) comprising driver roller elements and/or roller-path roller elements (27, 28) as active or passive conveyor elements (18) for moving the rolling material (2) in length direction (9) of the heating path (8), wherein the induction heating elements (4, 5, 6, 7; 104, 105, 106, 107) are arranged in length direction (9) of the heating path (8) to be respectively spaced apart by a free space (10, 11, 12),
   characterised in that
   a diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) and mutually opposite lateral guide elements (60, 61) are arranged in each free space (10, 11, 12) so as to avoid contact of the conveyed rolling material (2) with the induction heating elements (4, 5, 6, 7; 104, 105, 106, 107), and the diverter slide elements (34, 35, 36, 37, 38, 39, 40, 41, 73) and the induction heating elements (4, 5, 6, 7; 104, 105, 106, 107) are arranged in alternation with respect to one another along the heating path (8).
2. Device (1) according to claim 1, characterised in that the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged outside one of the surfaces, which faces the rolling material (2) of the induction heating elements (4, 5, 6, 7; 104, 105, 106, 107).
3. Device (1) according to claim 1 or 2, characterised in that the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged between one of the active or passive conveyor elements (18) and one of induction heating elements (4, 5, 6, 7; 104, 105, 106, 107).
4. Device (1) according to any one of claims 1 to 3, characterised in that diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) comprises a diverter head member (42) stationary relative to the conveyed rolling material (2).
5. Device according to any one of claims 1 to 4, characterised in that the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged with the longitudinal side (55) thereof transverse to the length direction (9) of the hearing path (8) in the free space (10, 11, 12) between two directly adjacent induction heating elements (4, 5, 6, 7; 104, 105, 106, 107).
6. Device (1) according to any one of claims 1 to 5, characterised in that the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged to extend over more than 60%, preferably more than 90%, of the heating path width (56).
7. Device (1) according to any one of claims 1 to 6, characterised in that the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged in free spaces (10, 11, 12), which are arranged above and/or below a conveyor plane (16) of the heating path (8), between two directly adjacent induction heating elements (4, 5, 6, 7; 104, 105, 106, 107).
8. Device (1) according to any one of claims 1 to 7, characterised in that at least two diverter slide elements (34-35, 36-38, 39-41) are arranged as a diverter unit to be vertically opposite with respect to the heating path (8).
9. Device (1) according to any one of claims 1 to 8, characterised in that at least two diverter slide elements (38, 41, 73) are arranged as a diverter unit to be opposite roller-path roller elements (27, 28, 24) with respect to the heating path (8).
10. Device (1) according to any one of claims 1 to 9, characterised by a horizontal spacing A_Hori between the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) and a directly adjacent inducting heating element (4, 5, 6, 7; 104, 105, 106, 107), an induction heating element spacing A_INDHori and a diverter slide element width B, wherein A_Hori = ½ x (A_INDHori - B) = (0 to 25%) x A_INDHori.
11. Device (1) according to any one of claims 1 to 10, characterised in that the diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged at a spacing from the next closest induction heating element (4, 5, 6, 7; 104, 105, 106, 107) of less than 100 mm, preferably less than 40 mm.
12. Device (1) according to any one of claims 1 to 11, characterised by an induction heating element passage height H_IND, a vertical spacing A_VertA or A_VertF between an upper diverter slide element (35, 38, 41, 73) and a lower diverter slide element (34, 36, 37, 39, 40) or a lower conveyor element (24, 27, 28), wherein A_VertA or A_VertF ≤ H_IND.
13. Device (1) according to any one of claims 1 to 12, characterised in that in the case of an induction heating element passage height H_IND < 200 mm, preferably < 80 mm, at least one diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) is arranged in one of the free spaces (10, 11, 12).
14. Device (1) according to any one of claims 1 to 13, characterised by a horizontal spacing A_HoriS between a lateral guide element (60, 61) and a directly adjacent induction heating element (4, 5, 6, 7; 104, 105, 106, 107), an induction heating element passage width B_IND and a lateral guide passage width B_F, wherein A_Horis = ½ x (B_IND - B_F) = (0 to 25%) x B_IND.
15. Device (1) according to any one of claims 1 to 14, characterised in that a diverter unit consisting of at least two vertically opposite diverter slide elements (34, 35, 36, 37, 38, 39, 40, 41, 73) and/or a lateral guide unit consisting of two horizontally opposite lateral guide elements (60, 61) together form or each individually forms at least in part a rolling material entry straightening means.
16. Device (1) according to any one of claims 1 to 15, characterised in that the diverter slide elements (34, 35, 36, 37, 38, 39, 40, 41, 73) are arranged to be vertically adjustable.
17. Device (1) according to any one of claims 1 to 16, characterised in that the diverter slide elements (34, 35, 36, 37, 38, 39, 40, 41, 73) are arranged to be vertically adjustable individually or in a frame in common with adjustable induction heating elements (4, 5, 6, 7; 104, 105, 106, 107).
18. Device (1) according to any one of claims 1 to 17, characterised in that the diverter slide elements (34, 35, 36, 37, 38, 39, 40, 41, 73) are produced from a temperature-resistant material and/or internally cooled, wherein a coolant feed of a cooled diverter slide element (34, 35, 36, 37, 38, 39, 40, 41, 73) comprises a hose connection.
19. Finishing train for producing and/or working elongate metallic rolling material (2) with a device (1) for increase of the temperature of the elongate metallic material, characterised in that the finishing train comprises a device (1) for increasing the temperature of elongate metallic rolling material (2) according to any one of the preceding claims.

Images