DE1813605A1 - Furnace with movable longitudinal beams - Google Patents

Description

- _{x mu} 4 Düsseldorf, December 9, 1968

Patent Attorneys Cecilienallee 76

Dr. Ing.Eichenberg

Dipl.-Ing. Sauerland . _Q , _{o ß n} _

Dr. Ing.King 1813bUb

Our files; 24 510

SOCIBTE ANOIiYME HETJROJEY, in Parie (France. Oven with movable lenght support

It is customary to use a whale

process, a construction process ο «dgl · billet, bloom or Pre-slabs are heated in a furnace with movable longitudinal beams.

There are two designs for

such furnace known. The first has one or more Longitudinal beams, each of which is formed by a metal beam is on which a continuous bed of refractory products rests which carries the insert in its displacements. These side members are in one or more longitudinal grooves in the Sole of the furnace inserted «The insert is advanced by a sequence of lifting, advancing, waiting and lowering movements of these side members ·

A second type of furnace of this kind has

metallic longitudinal member, of which one fixed and the other movable and carried by columns which pass through a sole of refractory products, where i * m the material to be treated in this manner over the floor of the furnace to

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a high is kept, which for a warming of the upper and the lower portion of the elements of the insert is appropriate

When these temperatures are relatively low, especially with heat treatments, it can suffice, the longitudinal beams and their supporting pillars made of refractory Making steel »At higher temperatures, such as when heating up before a rolling process, the columns must be cooled, e.g. by an internal water circulation and the longitudinal beams also consist of pipes with water cooling, which are comparable to those used in Sohub & fen

As for warming, so will

in the first type of furnace, the elements of the insert on their top immediately and partially heated on their side surfaces, but not on their subpages

With the second type, the item to be treated is acquired directly on the top and bottom, and, albeit less immediately, better on the side surfaces than with the first type

This means that in the second type of furnace, the heating takes place much faster, which leads to shorter furnace leads and better uniformity of temperature in every insert element, since it is heated practically on four sides on fixed and movable long members, which are water-cooled, so that at the point of contact between the insert elements and black blanks arise in the long beams, which are surrounded by dark zones due to the effect of shadows.

These less warm zones have that

Occurrence of thickening when rolling the insert elements concerned as a result, causing a serious failure of the stoves this second type forms.

Me invention aims to make this laugh.- ■ to remedy part.

The invention has an oven for this purpose

to the subject in which the heating of the insert element © up to a certain temperature, e.g. a rolling temperature, in a section takes place j which belong to the second type-

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the side members is provided while at least one other section Longitudinal beams of the first type is assigned and in active ' possibility forms a compensation zone.

In this second furnace section can

a heating can be provided, which essentially the surface of the insert element · on that required for the rolling Temperature, and since it has no cooling elements, the black spots or the dark zones warm up in it through Wäinneleitung from the neighboring zones and laterally through the Radiation of the furnace, for which the processing time is selected accordingly is.

In a first embodiment contains such an oven has at least one movable one-piece longitudinal beam with two sections with common actuators, of which the first section in which the layer made of refractory products is offset downwards, supports columns and correspondingly cooled longitudinal struts, which are at the height of the refractory coating of the second section of the longitudinal beams.

In a variant embodiment, has

the lifting mechanism at least two consecutive one from the other independent movable side members, the first of which with is provided with a fire-proof protection and supports pillars and cooled longitudinal struts, while the second simply has a fire-proof one Edition is provided.

These two versions are

the longitudinal struts and pillars on those with refractory products occupied longitudinal beams attached, while in the known designs, such columns on a general below a base made of refractory materials are attached and pass through the sole in openings, which necessarily have large dimensions, which with the through the feed and return movement of the longitudinal struts and the Columns generated longitudinal displacement are compatible. In the oven at a relatively low temperature, the tightness such leadthroughs can be achieved by slide However, at high temperatures, individual hydraulic seals are required and form wide cold spots.In addition, they fill -

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quickly with oxides o _e like, "which drop from the material to be treated, wherein a convenient cleaning is not possible.

In contrast, the inventive

mass device has the advantage of sealing by a continuous Hydraulic seal of the usual type, which, as experience shows, due to the narrowness of the gap between the movable side members and the bottom of the furnace only a small amount of oxides or other waste passes through, which from such Seals can be easily removed using these seals Incidentally, no particular for the quality of production create harmful cold spots

The invention is explained below by way of example with reference to the drawing »

fig · 1 shows schematiBeh in one

Longitudinal section along line II of Pig "2 a furnace with movable bearings of the type ₉ defined above, while Pig # 2 is a section through a horizontal plane passing through lines II-II in FIG. 1"

FIG. 3 is a section along the line III-III in FIG. 2.

Fig. 4 is a middle section along the outer may IV-IV the Pig. 1.

Pig «, 5 is a cut of the line V-V the Pig 1.

Pig »β iat a section along the line VI-VI of FIG. 1.

Fig »7 shows in the same bar position

As in FIG. 1, an embodiment modification with two independent ones Side members

In the example shown in Figure 1, the heating chamber 1 has an oven in its upper part Burner 2 and Ia their end walls an opening 3 eur introduction of the material to be treated and an opening 4 for discharging the same After the treatment «In this heating chamber 1 there is a sole, the movable section of which forms a longitudinal beam rests on a metal support 5, which movements in a perpendicular Direction and in the longitudinal direction can be issued »For this rest according to a known technique that looks over the whole

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6AD ORIGINAL

¹¹¹ I ¹ IlIlPW '

Long the heating chamber 1 extending carrier 5 on rows of rollers. 6, the axes of which are carried by ends of pivot levers 7, the opposite ends of which are connected to one another by links 8 are connected, one of which is coupled to the piston rod of a working cylinder 9 generating a vertical lifting. In addition, the carriers 5 are coupled to the piston rod of a working cylinder 10 for the longitudinal feed · In this way the lifting of the carrier 5, their longitudinal movement in the feed direction of the material to be treated, their downward movement and thereupon their return in the longitudinal direction to the starting position can be generated without the item to be treated in this last movement phase is taken

They are carriers 5 on part of their

Long on the side of the input 3 bits provided a refractory coating 11, while on the complementary part on the Side of the exit 4 carry an elevation 12 which is provided with a fire-resistant coating 13. A fireproof wall 14 establishes the connection between the covers 11 and 13

In the zone of the coating 11, the side walls of the heating chamber 1 can contain burners 15

Located on the refractory coating 11

look for columns 16 which support longitudinal struts 17 in the extension of the cover 13

As can be seen in particular from FIGS. 2 and 3, such a movable longitudinal beam can be provided with fixed Sole elements cooperate, which enclose it and in the zone of the movable longitudinal struts 17 include fixed longitudinal struts 18, which are also supported by columns 19 and themselves braced on the side walls by struts 20, while the solid sole elements in the zone of the cover 13 have a fire-resistant overlay 21 "

To produce the seal is a

Rectangular liquid channel 22 located below the level of the carrier 5 is provided, into which a Siohtungsmantel immerses, which in the zone of the coating 11 proportionally lower sections 23 and higher in the zone of the coating 13 Has sections 24, the upper parts of these jacket sections adjoining the coverings 11 and 13 tightly. as well

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on the circumference of the formed ¹ the refractory top pull the fixed sole portions opening homologous dumbbell 25 and 26 are provided, this arrangement serves the extension of the gap zwisohen the fixed and movable parts of the sole to make as small as possible · The of the groove 22 given The width is naturally small in the longitudinal zones, but rather large in the transverse zones in order to allow the sheath elements 23 and 24 to deflect in this interior «

The pillars 16, the pillars 19 and the

corresponding struts 20 and the longitudinal struts 17 and 18 are hollow and can be flowed through by a coolant, the supply and discharge of which are not shown. In the example described, the furnace has two identical movable ones in parallel working long beams and three fixed sole zones, so that the columns 19 in the middle zone form the feet of a fortal. The same applies to the columns 16 of the movable long struts.

From a mechanical point of view, the mode of operation of this arrangement for the advance of the item 17 to be treated is the usual one, the item being treated by the movable longitudinal beams from one end of the fixed sole sections is conveyed from the entrance 3 to the exit 4, where the material to be treated is only indicated schematically by a conveyor 28 is adopted.

On the longitudinal struts 17 and 18 is

das.Behandlungsgut 27 heated directly by the burner 2 and 15 on its top and bottom, the side surfaces are also reached, albeit less directly.

The contact with the longitudinal

strive and in the neighboring sections remained cold zones are suppressed in the second section of the path, which is traversed by the material to be treated in the zone in which cm rests on the refractory coatings 13 and 21.

This gives rapid heating in the first zone of the furnace and equalization in the second.

Like in Pig. 7, instead of a single movable side rail over the whole

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BATH ORIGINAL

Long to provide for the furnace, such a longitudinal beam can be constructed in two parts. A first carrier 5a carries one here coating 11 and a tusker 14 as well as through the pillars 16 the corresponding long struts 17 ·

Sin second longitudinal beam with a higher arranged beam 5b carries the coating 13 opposite the upper portion of the tusks 14. Each beam has 5a and 5b its own meohanism for lifting and for longitudinal movement in the form of working cylinders 9a, 10a. and 9b, 10b. The increase 12 is then superfluous, but two sealing channels 22a and 22b that are independent of one another and offset in height must be used with the corresponding dumbbells for each side member 5a, »5b.

This training has the further

The advantage that they advance the material to be treated 27 at different speeds and different distances in the Warming zone and the equalization zone are permitted.

To the arrangements described above

Other hatreds known to exist in the case of conveyors with side members may be added. Soles and longitudinal beams can be provided, which have steps in their surface and degrees of variation in the lifting movement, in order to handle the item to be treated differently in certain zones than in other zones generate the B _e handlungegute8, ζ.B, rotation or inversion.

The number of treatment zones is of course not limited to two, and the above embodiments can be modified.

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Claims (1)

Claims { Ii) Furnace with long beams with at least two main zones, one of which corresponds to a warping and the other corresponds to a temperature equalization of the items to be treated, characterized by longitudinal struts (17-18) of the first zone, which have supports (16) for the items to be treated (27), which are at a certain distance hold by an oven floor (11), and longitudinal beams (15-21) of the second zone with a coating ₉ on which the treatment item (27) rests directly 2) Furnace according to claim 1, characterized in that that the longitudinal members (17 »18, 13, 21) of the two Zones are firmly connected to each other « '3 ·) Furnace according to claim 1, characterized in that the longitudinal beams (17 »18 and 13» 21) of the two Zones are independent of each other (Fig. 7) ■ 4 ·) © fen according to claims 1 to 3 »thereby characterized in that the the treatment gate (27) from the ground dee oven holding away! rager (16) tereh slowstpelsea (17) supporting pillars (16) formed-evaluate »wosel lies« pillars (16) and Long strive (17) to become a cooling liquid 5 x) oven NaOH claim 4 r characterized, in t that the columns (16) eini placed on the Bodenuberzug (11) of the furnace _$ and that tie movable portions of the bib (11, 1y) extending in in & ® n fixed ropes. (21) The bottom of the oven-shaped hats verse-M, ®b®a _f firmly connected with DiohtimgeftiLordntingen (22, 24 »26), unites, which are formed by jacket, which at each of these sections in a corresponding continuous hy & raolisehe sifting (22) immerse 6 «) furnace according to claim 1, characterized in that the movable iSngstragerabechnitt (13) of the «Wide zone opposite the corresponding furnace bo & enabeohnitt des movable longitudinal beam (11) of the first zone is so excessive, that the Traneportlüngsstreben (17) of the first zone approximately in the same level as the refractory coating (13) i®? second zone lie· 909827/1162 BATH ORIGINAL