DE2219170A1 - Heating furnace with movable beams - Google Patents

Description

DR. HEINZ FEDER DR. WOLF-D. FEATHER

PATENT LAWYERS
Dusseldorf

File 72-10-56

April 19, 1972 WI / Ka

Stein Surface, 108, Bureaux de la colline, 92 - SAIHT- (JLOUD j

ϊ / arm oven with movable beam.

The present invention relates to a heating furnace of the beam hearth type and, more strictly, to a furnace of this type comprising means for lowering the containers of a liquid seal, said means consisting essentially of j a drive device formed by control cylinders and j a system of inclined rails is, are arranged so 'that the beam hearth furnace are arranged by increasing the Eaums between the containers of the! fluid seal ken at the lower end of the movable BaI [, and the bottom of the furnace is facilitated ■ the inspection and maintenance of these containers

! Over the past few years, the beam hearth type heating furnaces have become more widespread for treating slabs and other workpieces. Such beam hearth ovens sit as a 'device for transporting the Werlc- ¹ sbücke to be treated from the loading end of the oven to the unloading end of the oven! a syabeiu of fixed and movable beams, which alternate depending on the current state of the lifting and lowering.

movement of the movable beams carry the workpieces.

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BAD ORiGiNAL

There are various types of control mechanisms for such beam hearth furnaces Systems are used that use either inclined rails or cranked or eccentric shafts. The present Invention relates to systems using inclined rails.

In a heating furnace of the beam hearth type with a System of inclined rails, the movable beams are moved forwards and backwards by being driven via brackets which are moved by hydraulic cylinders or similar "devices, and they are raised and lowered via rollers arranged under these brackets and with the help of other control mechanisms along the inclined rails are guided up and down.

In such a case, the movement cycle of the movable beams is limited by the length of a vertical run (corresponding to the height of the inclination of the rails) and the run in the longitudinal direction of the beams, the latter determining the transport capacity. It is needless to say that about this transport capacity to increase, a possible short-duration movement cycle is preferable.

Furthermore, the sealing of the control system for the movable beams of a beam hearth furnace is achieved by means of a liquid seal container which is attached to the base of the movable beam ^; are ordered, as well as by connecting plates which are arranged outside the openings of the furnace, through which the control members for the movable beams are passed. The outside air is intercepted in that the underside of the tubular connecting plates is always below the water level in the containers of the liquid seal. To the extent that the height displacement of the movable

BATH ORIGINAL

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If the beam grows, so does the surface of the connecting plates, which stand out from the 'water of the container. In the same way, the part of each plate that the is exposed to heat radiation emanating from the furnace, which affects the service life of the panels. At the same time, in the extent to which the heat radiation increases the ambient temperature leaves the sheet steel elements at the bottom of the furnace, making inspection and maintenance very difficult.

For these reasons it is desirable to determine the cycles of movement of the movable beams, especially their vertical displacement: Sighting, to a minimum, allow the surface of the connecting pipes, which are caused by the water level in the tanks the liquid seal passes through, is limited.

.leim but the vertical movement is reduced, is at the same time;

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the space between the C ^ e.a and the connecting plates downsized, 'causing problems in terms of maintenance and inspection of the containers as a result of the difficult Operations poses.

Foreign objects such as pieces of slag or bricks etc. fall often in the container of the liquid seal.

For this reason, the inside of the container of the liquid seal must be carried out at regular intervals or every time it presents itself ^! Opportunity to be investigated. Cases are known in which negligence in carrying out this investigation and this maintenance resulted in serious consequences, such as, for example, the total failure of the plant. Usually, the \ inspection is conducted during standstill of the gaps between the oven and the connection plates. However, this gap is narrow in ^general] j from the reasons stated above, and besides, it often happens that due to the ^Tat:

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sach.e that the connecting plates are immersed in the container, are that these containers would be difficult to inspect and maintain and would require more time than the actual ones Work and from the point of view of the efficiency of manufacture + · would be harmful.

The object on which the invention is based was to create a beam hearth furnace which would have the above-mentioned disadvantages of does not have known arrangements.

! The subject of the invention is a heating furnace with movable beams,

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! whose supports are guided through openings arranged on the underside of the furnace, liquid seals serving to seal these openings, the liquid containers of which with the supports of the movable beams are connected and can be lowered together with the supports, the lowering movement being over inclined Rails running hollen is controlled. The above object is achieved in that, according to the invention, the rails on their Top have several sections, of which at least two are formed inclined to the horizontal. Included ! the inclined sections can have different lengths and / or different angles of inclination. To control the aging A system of control cylinders can serve for translational movements and the vertical movement of the movable beams. It has proven to be useful if this system 'Has at least one control cylinder for controlling the translational movement and at least one control cylinder for Control of a first vertical movement in which the clumps run on one inclined section of the rails and at least another control cylinder to control a second vertical movement, in which the rollers run on the second inclined section of the rails.

In the device according to the invention, one of the vertical movements is used, by the one inclined section of the rails

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is controlled for the transport of the "workpieces to be treated.,
while the other vertical movement, "the one ge_
inclined section of the rails is controlled, _ is used to lower the j container of the liquid seal. The control cylinders ^,! which are used to lower these containers are with the supports
the movable beam connected so that the gap
between the furnace and the containers can be enlarged and "one can pull the tubular connecting plates completely out of the container. The invention thus allows for inspection
provide a larger working space of the container of the liquid seal, and in this manner the difficulties _are: eliminated, which oppose a production with good efficiency.

In the following, with reference to the accompanying figures ^execution: explained in more detail examples of the subject invention.

Figure 1 shows in longitudinal section a beam hearth furnace according to

.Invention,

Figure 2 is an enlarged partial section along the line II-II '

in Figure 1. ■!

FIG. 3 shows, in an enlarged partial representation, the furnace in the area of one of the inclined rails.

Figures 4 and 5 show an embodiment for a

Control system for lowering the reservoirs of the liquid seal:

in a furnace according to Figures 1 to 3

Figures 6 and 7 show another embodiment for;

such a tax system. I.

Figures 8, 9 and 10 show in partial section, similar to Figure 2, ί the conditions necessary for lowering the containers of liquid J

Lead seal of a furnace according to Figures 1 to 7.

The Balkeuherdofen shown in Figures 1 and 2 has
one overcame 1, a side wall 2 and a floor 3 auf.-Feste
Beam 4 and movable beam 5 form the transport mechanism

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for the workpieces to be treated. The fixed beams 4 are supported by fixed uprights 6, and the movable beams 5 are held by uprights 7, the uprights 7 on the ^! Outside of the furnace arranged pedestals 8 are arranged. '

The lower end of each of the uprights 7 'which support the movable beams ' is attached to the SooKel 8, which is arranged below the bottom 3 of the furnace in such a way that each of these uprights 7 is passed through an opening 9 which leads to this ZweaK is provided in the bottom 3 of the furnace. The base 8 can be set in a reciprocating translational movement by a control cylinder 10.

In the illustrated embodiment, the base 8 carries out this translational movement via upper rollers 12, which on a carrier 11, which is arranged below the base 8, and the movable beams 5 are driven via the base 8.

The movable beams 5 are set in vertical movement due to the fact that rails 13 are inclined and that the carrier 11 is moved by a cylinder 14. Of the When the carrier 11 is displaced under the action of the cylinder 14, it runs over lower rollers attached to its underside

15 rising and falling on the slope of the rails 13 and thus causes the vertical movement of the movable beams 5. The workpieces to be treated are from the loading end 16 of the The furnace is transported to the discharge end 17 by being carried alternately by the movable beams 5 and the fixed beams 4. the. Furthermore, the lower end of the carrier 7, which supports the movable beams, is immersed in one of the containers 18 of a liquid s seal, which is arranged on the movable base 8 as shown: ösnd. In addition, connecting pipes 19 are on sheet metal elements 26 of the bottom 3 of the furnace arranged and that o ^ s that

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the lower end of each of these tubes constantly despite the height shift the movable beam 5 below the water level is in the container to prevent the outside air from entering the j oven can penetrate »At the end of each tube 19 is a scraper I 25 arranged, which is intended to remove pieces of slag or other

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j re to remove waste falling from the furnace through the openings 9 into the container in the course of the vertical movement. In the example shown in \ 2 state can the container through the interspace • Hf observed, which between them and the sheet metal: consists elements 26th Such an inspection is very ·! difficult because this gap is very small.

One of the aims of the above invention was therefore the ^one available space between the sheet metal elements 26 and Be-.hältern 18 of the liquid seal to enlarge. This is, wi already described above, achieved by the container wfcrdSp 18, lowered together with the base 8 supporting the movable beam ^1, a position under the position of the ^fixed! Beam 4 lies. For this purpose, use is made of a device which has inclined rails, as shown in FIG. 3, and a system of control cylinders, as is shown in FIGS. 4 to 7. The inclined rail 13 has two inclined sections. The section A, B is used during the normal transport cycle of the vertical displacement of the movable bars 5 »and the section B, G is used to lower the container of the liquid seal.

Better efficiency is generally obtained if the Section B, C is more inclined than section A, B, section A, B can have flattened points such that the base 8 for supporting the movable beam is supported when the container of the liquid seal in the deep Position is. Furthermore, according to an embodiment not shown, the inclined rail on the base, which the movable

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Bar beams supported, be attached, and the rollers can be arranged ¹ on the furnace itself.

In the illustrated embodiment, as ^{can be seen from FIG. 1,} FIG. 3, the height h1 of the section A, B corresponds to the vertical movement of the movable bars, and the height h2 of the section B, 0 corresponds to the distance traveled when lowering the container of the liquid seal.

Systems with control cylinders, as shown in FIGS. 4 to 7, can be used to lower these containers . In the system according to FIGS fastening element 22 is connected, which is arranged on the carrier 11, which carries the Hollen 15 * the cylinder 19 need only be designed so that it, the system of the movable bar and the container of the liquid seal su control capable · It is thus a cylinder except-calibrating which is literally smaller than the cylinder 10 for controlling the alternate translational motion or the cylinders 14 for controlling the altitude.

I «falleι that the container of the liquid seal be lowered Hollen, as is first necessary, in accordance with the conditions, such as pie in Figure 4 are shown, the hinge connection 23 between the carrier 11 and the cylinder 14, the iteuert the vertical movement, to release and then to connect the fastening element of the rod 20 to the fastening element 22, which is arranged on the carrier, and to put the cylinder 19 in operation. The lower rollers 15 then run from point B down to point 0 according to the inclination of the rails, and the base 8, which supports the movable beams and on which the containers of the liquid seal are arranged, passes through the giant h2 (see Figure 3) to aamen bit the carrier 11, the to

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He arranged lumps 12 also move in the longitudinal direction ".

FIG. 5 shows the state of the device "with the base 8 lowered with the movable bar lowered and" containers of the ^% liquid seal.

When the inspection is done, cylinder 19 will be in the other way around, with the caverns moving from point 0 to point B. Then the carrier 11 is again connected to the control cylinder 14, and the, Bθfθstigungaelemθntφ 21 and 22 are solved. ·

As a control system on a device according to the invention, not only a system of control cylinders as shown in FIGS. 4 and 5 can be used, but also a system according to FIGS Lowering the container of the liquid seal is intended to effect, connected to the cylinder 14, which controls the vertical movement via the carrier 11. This means that the cylinders 14 and 24 are positively connected to one another. To lower the container 18, the control cylinder 24 is put into operation, in the manner shown in FIGS. 6 and 7! the cylinder 14 displaces in the longitudinal direction, wherein the carrier 11; is lowered. FIG. 7 shows the state of the system when the lowering of the base 8, which supports the movable beams and on which the containers of the liquid seal are arranged, has been carried out. When the inspection is finished, the cylinder 24 is put into operation in the opposite direction, the lower lobes 15 again running from the point to point B of the rails 1 , and the carrier 11 being raised again. ·

The mode of operation of the containers is shown in FIGS. 8, 9 and 10 refer to the liquid seal. First of all) when the move Baren bar 5 is in a opposite to the position of the fixed

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Bar 4- are in the raised position, indicates the height of the space between one of the sheet metal elements 26 at the bottom of the furnace ; and the corresponding container 18 the stallt? reduced value St. as shown in Figure 8 When the movable beams 5 are below the position of the fixed beams 4, the height of the gap between the same element 26 and the same container 18 reaches the value H2, as in FIG 9. The position according to FIG. 9 corresponds to the position of the system according to FIGS. 4 and 6 in normal operation of the furnace change the positions according to Figures 8 and 9 accordingly the movement of the movable beams.

If it is necessary to seal the container of the liquid lower in order to carry out checks or repair work, the containers are brought from the position shown in FIG. 9 into the position shown in FIG. the , position shown in Figure 10 corresponds to the position of the system according to Figures 5 and 7 · The height of the gap between the sheet metal elements at the bottom of the furnace and the containers of the liquid seal now reaches the value H3.

From the consideration of Figures 3, 8, -9 and 10 in connection results as the height for the space between the bottom of the furnace and the containers 18 when they are at their deepest Position are, the value H3, = »Hl + hl + h2. This very much larger space allows the implementation with ease the necessary controls and repair work.

When this work ^ is finished, the containers become the Liquid seal returned from the position shown in Figure 10 to the position shown in Figure 9, from where from the successive positions can be resumed, which are shown in Figures 8 and 9 and the correspond to different heights of the movable beams

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Claims (1)

-.11 claims . Heating furnace with movable beams, the supports of which are guided through openings arranged on the underside of the furnace, with liquid seals serving to seal these openings, the liquid containers of which are connected to the supports of the movable beams and can be lowered together with the supports, the lowering movement being carried out on inclined rails running rollers is controlled, characterized in that the rails (13) on their upper side: have several sections, of which at least two (A, B; B, 0) are inclined to the horizontal; are. 2 «Heating furnace according to claim 1} characterized in that the inclined sections have different lengths and / or different angles of inclination. ; 3 · Heating furnace according to claims 1 or 2, characterized _{ι that a system of Steuerzyiinderri (1O 1} 14, 19, 24) is used to control the alternating translational movement and ■ the vertical movement of the movable bar (5). 4, heating furnace according to claim 3, £ characterized by at least ens j a control cylinder? (10) to control the translation movements * - j guns * at least one * m control cylinder (14) to control an er a th vertical movement in which the rollers (It?) On an inclined section (A, B) of the rails (13 ) run and at least one further control cylinder (19 "24) for ^Steue-: tion of a second vertical movement, wherein the Bollen (15) on the second inclined portion (B, O) through the rails (13). 209847/0708 BATH ORIGINAL Blank page