EP2322889B1 - Dispositif de retenue pour une pierre d'ancrage céramique et four doté d'un tel dispositif de retenue - Google Patents

Dispositif de retenue pour une pierre d'ancrage céramique et four doté d'un tel dispositif de retenue Download PDF

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Publication number
EP2322889B1
EP2322889B1 EP20100014570 EP10014570A EP2322889B1 EP 2322889 B1 EP2322889 B1 EP 2322889B1 EP 20100014570 EP20100014570 EP 20100014570 EP 10014570 A EP10014570 A EP 10014570A EP 2322889 B1 EP2322889 B1 EP 2322889B1
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EP
European Patent Office
Prior art keywords
retaining
plate
furnace
anchor
retaining device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20100014570
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German (de)
English (en)
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EP2322889A1 (fr
Inventor
Peter Nebgen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEBGEN, GABRIELE
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Individual
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Publication of EP2322889A1 publication Critical patent/EP2322889A1/fr
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Publication of EP2322889B1 publication Critical patent/EP2322889B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/145—Assembling elements
    • F27D1/147—Assembling elements for bricks
    • F27D1/148—Means to suspend bricks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/141—Anchors therefor
    • F27D1/142—Anchors made from ceramic material

Definitions

  • Such fixtures are used in heating ovens used in all metal forming industries.
  • the walls, floors and ceilings of the furnaces are lined for thermal insulation with chemically, mechanically and thermally stressed structures made of refractory materials.
  • This lining but also the process of renewing a lining, is called delivery.
  • the attachment of the refractory material to the furnace wall is of particular importance.
  • the anchor stone is regularly fixed centrally in the holding device so that the thermal expansion of the refractory lining occurring in the oven operation can be tracked as movement in the holding device.
  • a fixation of the anchor stone is problematic but in particular because of the thermal expansion due to the heating to operating temperature, tear through the anchor stone or damage to the fixture can be caused.
  • the present invention is therefore based on the problem to improve a generic holding device for a ceramic anchor stone, i. To store the anchor stone by a fastener so in the recording that it breaks off neither with increasing thermal stress in the furnace operation still damaged the fixture. An optimal interaction between furnace wall and anchor stone or the lining should be ensured. Another object of the invention is to ensure an improved assembly of the anchor stone in the holding device. Furthermore, the present invention seeks to provide a furnace improved with respect to attachment of the anchor stone.
  • the present invention proposes a holding device for a ceramic anchor stone on a furnace wall having the features of claim 1.
  • the holding device according to the invention differs from the generic state of the art in that the fastening means is formed from a material which acts in the oven operation in the region of the holding device Temperatures are melting.
  • This fastening means may for example be a fastening means which fixes the anchor stone after its mounting in the receptacle.
  • the material of the fastening means is preferably selected so that a certain softening of the fastening means occurs with increasing heating in the region of the holding device.
  • the fastening means softens accordingly, as a result of which stresses, in particular in the region of the receptacle, are reduced.
  • the fastening means according to the invention is made of such a material, which melts at temperatures that act in the region of the holding device in the oven operation. Although these temperatures are reduced compared to the furnace temperature due to a refractory lining in the furnace wall. But they are regularly well above 200 ° C.
  • the present invention seeks to provide a fastener which melts at such temperatures. As a result, although the effect of the fastener is lost. However, this is needed anyway only for the installation of the refractory lining on the inner wall of the furnace. After delivery, the refractory bricks are supported against each other around the furnace wall around, so that when completed delivery could be dispensed with fasteners basically fix the anchors of the refractory lining against the furnace wall.
  • the present invention accordingly teaches a fastener for holding the anchor stone in the receptacle.
  • This fastener is lost during operation of the furnace regularly completely.
  • the said fastening means is in particular that fastening means which fixes the anchor stone centrally in the holding device.
  • further fastening means may be provided.
  • These fasteners can satisfy the criterion of the invention of fusibility. But it can also be provided fastening means which do not melt at the temperatures acting in the field of holding device in the oven operating temperatures.
  • Fasteners may be formed of refractory materials.
  • the present invention preferably holds on the from EP 0 818 662 A2 known principle, in which the anchor stone is urged by the fastening means against the recording.
  • the fastener is then such a way that the anchor stone frictionally engages the walls of the receptacle through the intermediary of the fastener, so that the anchor stone is securely held in the receptacle even if it allows passage of the anchor stone in the gravitational field of the earth.
  • the fastening means is preferably made of plastic.
  • This material offers the possibility of mass-producing the fastening means, for example by means of injection molding.
  • This also fasteners with complex geometry can be produced inexpensively.
  • fastening means may be designed in the manner of a screw.
  • a plastic is in particular a thermoplastic material into consideration, which initially softens due to increasing temperature in the region of the holding device when the furnace is heated to operating temperature and finally melts.
  • Plastics conceivable for this development should have a melting point of preferably between 150 ° C. and 300 ° C.
  • the fastening means is designed as a set screw which can be applied against the anchor block received in the receptacle, the mounting of the anchor block is easy. This only has to be introduced into the recording and held there. The set screw is then screwed against the anchor stone to frictionally apply this against at least one wall of the receptacle. After that, the anchor stone is first fixed in the receptacle.
  • a plate which can be suspended in the receptacle.
  • This plate can meet the criterion given in claim 1 for the fastening means and melt at temperatures acting in the region of the holding device in furnace operation.
  • the plate can just as well consist of a material which does not melt in the region of the holding device in the oven operating temperatures and carry fusible fastening means.
  • said plate is provided as part of the fastening means between the screw and the anchor stone, so that the adjusting screw with the interposition of the plate is urged against the anchor stone.
  • the plate serves accordingly to equalize the contact pressure of the screw against the anchor stone.
  • the contact pressure is transferred flat to the relatively brittle ceramic anchor stone.
  • the plate can be partially formed of melting material, which leaves open the possibility of forming the set screw of a material which does not melt at operating temperatures.
  • both parts of the fastener will melt in furnace operation, preferably burn, so that no residues of the fastener remain when re-supplying the furnace, which would have to be removed first, before a new attachment of a new anchor stone can be done with new fasteners.
  • the plate suspended in the receptacle. It is proposed according to a further preferred embodiment, to form the plate T-shaped. Accordingly, the plate has a central portion which cooperates with the back of the anchor stone and evened the contact pressure of the screw. From this central area protrude laterally webs, which are preferably placed on an edge of the receptacle. Accordingly, prior to the introduction of the anchor stone into the receptacle, the plate can be hung in a simple manner from above into the receptacle.
  • the plate has at least one support for marginal contact with the anchor stone.
  • a pre-adjustment of the anchor stone is accordingly achieved in a simple manner in that first the plate is hooked into the receptacle. Thereafter, the anchor stone is introduced with its hammerhead-like attachment end into the receptacle from above. This insertion movement usually takes place in the gravitational field of the earth and finds its end when the anchor stone abuts against the support. By mediating the plate formed in such a manner, a slight prefixing of the anchor stone is accordingly achieved.
  • the plate can also be designed so that it has the support at one edge of the anchor block and a stop which is assigned to the opposite side of the anchor block and can be applied to this.
  • the support and the stop usually protrude from the regular flat plate and limit the mobility of the provided between the support and the stop anchor block.
  • the support and the stop meet different functions.
  • the stop is usually located on an upper side of the plate and has the task to keep the plate before and during feeding of the plate regularly together with the anchor stone on the anchor stone.
  • the anchor stone is usually already between the support and the stop and regularly lies flat against the plate.
  • the plate is inserted together with the anchor stone from above into the receptacle. The movement of the plate and the anchor stone in the receptacle is limited.
  • the plate can only be inserted so far into the receptacle until its lateral webs rest on the receptacle, i. the plate is hung in the receptacle.
  • the anchor stone end can hereby be further moved into the receptacle, this movement being limited by the support on the underside of the plate.
  • the anchor stone end then rests on the overlay.
  • the usually T-shaped retaining plate is hooked into the receptacle.
  • the said plate may also be essential to the invention and come without an adjusting screw for use. It is conceivable, for example, the design of a plate as a wedge or in conjunction with wedges, which fix the plate stationary in the context of the delivery of the furnace and urge the anchor stone through the plate and the wedges or against the recording. With increasing heating of the furnace and heating to operating temperature melts the corresponding plate, so that thermal stresses can be compensated within the recording.
  • the wedges can be formed from a material other than a material, which melts at temperatures which act during operation of the furnace in the region of the holding device.
  • the adjusting screw carries the receiving means.
  • This means in particular an embodiment in which the adjusting screw, which usually penetrates the holding web and is received there in threaded engagement and the receiving means are coordinated with each other, that the voltage applied to the screw receiving means is prepositioned, for example hangs on the adjusting screw.
  • the receiving means preferably comprises two webs extending parallel to one another, for example of a heat-resistant metallic material, which are bent into a claw and which delimit the receptacle. These two webs are usually connected by a piece of sheet metal. The piece of sheet metal is usually welded between the webs.
  • a receiving means which provides a certain guide length for the anchor stone when introducing the same into the receptacle in the gravitational field of the earth.
  • the present invention provides a furnace, which has in a conventional manner a furnace wall and projecting retaining webs for supporting anchor bricks.
  • the oven according to the invention has a holding device according to one of the preceding claims, which is provided between the anchor stone and the holding web.
  • This furnace realizes the advantages already presented with regard to the holding device.
  • the retaining bar has a thread in which the screw is in threaded engagement. It can also be recessed several threaded holes on the retaining web, in which a plurality of screws are screwed to equalize the surface pressure on the anchor block by holding the same over several screws.
  • the retaining web is preferably formed as a U-shaped bracket whose opposite webs are welded to the inner surface of the furnace wall regularly to secure the retaining web to the furnace wall. In between, there extends a central region, which usually extends parallel to the furnace wall. This center region usually has the one or more threaded holes for receiving the set screw. For attaching the receiving means of this is introduced into the U-shaped bracket, that is inserted between the furnace wall and the central region of the web.
  • the adjusting screw which in any case also extends in this area, serves as a support for the receiving means.
  • care can be taken by appropriate dimensioning of the distance between the central region and the inner surface of the furnace wall that the receiving means after hanging on the mounting screw is movable only within limits, whereby the prefixing of the receiving means can be improved prior to introduction of the anchor stone.
  • the receiving means has a V-shaped recess. This is dimensioned such that the adjusting screw can be introduced into this recess.
  • the V-shaped recess is further configured such that a displacement of the receiving means in a horizontal direction perpendicular to the furnace wall is substantially prevented.
  • the V-shaped receptacle is accordingly used for self-adjustment or centering of the receiving means relative to the fastening screw. This can ensure that the receiving means is arranged centrally relative to the web before the anchor stone is introduced into the receptacle formed by the receiving means. In this way it can be ensured that the anchor stone is loaded centrally and thus symmetrically when it is clamped in the receptacle.
  • the recess is preferably recessed centrally in a rear wall of the receiving means extending parallel to the inner surface of the furnace wall.
  • FIG. 1 a furnace wall 2 and a projecting from this holding web 4 is shown.
  • the retaining bar 4 is formed as a U-shaped bracket, with two vertically from the furnace wall. 2 outgoing, parallel to each other extending legs and a middle parallel to the furnace wall 2 extending center region 4a.
  • the vertically projecting legs are connected by welding to the furnace wall 2.
  • FIG. 1 shows FIG. 1 a fastening means received in the center region 4a and extending perpendicularly to the furnace wall 2.
  • the attachment means is a set screw 6 made of plastic (in this case polyethylene), which is in threaded engagement in a threaded bore which is recessed in the middle region 4a in about the lower third of the same.
  • a receiving means 8 is first positioned on the holding web 4.
  • This receiving means 8 is substantially formed as a C-shaped claw, which has a receptacle 10 and the free ends 12 are inwardly bent around to an anchor stone 14 with its fastening side end, which is designed in the manner of a hammer head 16 to encompass (see , FIGS. 4 and 5 ).
  • the receiving means 8 is formed of two parallel extending webs 18, 20 and an interposed sheet metal piece 22.
  • the sheet metal piece 22 is connected by welding with the two bars 18, 20 formed from round bars.
  • the bearing surfaces formed by the receptacle 10 for the anchor stone 14 are formed by the webs 18, 20.
  • the receiving means 8 has a parallel to the furnace wall 2 extending rear wall 24 which is provided between the central region 4 a and the furnace wall 2. At this rear wall 24 of the lower web 18 is formed centrally inwardly to a V-shaped recess 26 which receives the screw 6. This is recognizable by the representation according to FIG. 2 in which the adjusting screw 6 is approximately at the height of the lower web 18 in the side view. From this lower position of the web 18 is in the region of the rear wall 24 inwardly bent. When lowering the receiving means 8 on the adjusting screw 6, a certain self-centering of the receiving means 8 results centrally to the holding web 4. The middle portion 4a of the holding web 4 is located within the receptacle 10 on the inner wall of the rear wall 24 facing away from the furnace wall 2.
  • FIG. 3 which shows the next step in the assembly of the anchor stone 14 on the receiving means 8, becomes a side view T-shaped plate, which forms part of the fastening means, suspended in the receptacle 10, and immediately adjacent to the inner surface of the rear wall 24.
  • the plate 28 has a length such that it projects through the receiving means 8. From the lower end of the plate 28 projects from a cylindrical retaining pin 30 which is provided centrally in the width direction of the plate 28. When hinged plate 28, the longitudinal axis of the retaining pin 30 is deeper than the lower leg of the retaining web 4.
  • the retaining pin 30 forms - as in particular FIG. 4 seen - a support surface 38 for the anchor stone 14 from.
  • FIGS. 4 and 5 clarify the anchor stone 14 is introduced with its hammer head 16 from above into the receptacle 10.
  • the plate 28 is urged between the hammer head 16 and the inner surface of the rear wall 24 and against the central region 4 a of the retaining web 4.
  • the insertion movement of the anchor stone 14 finds its end when the anchor stone 14 abuts against the support 38. Due to the dimensioning of the thickness of the plate 28 and the corresponding extension of the hammer head 16 of the hammer head 16 is held only with little play in the receptacle 10 before tightening the screw 6. Now, the screw 6 is tightened to urge the hammer head 16 of the anchor block 14 against the free ends 12 of the receptacle 10. The reached end position is in the FIGS. 4 and 5 clarified.
  • FIG. 6 shows a modification of with reference to FIG. 3 described plate 28.
  • the in FIG. 6 shown plate 28 has three retaining pins, namely two lower retaining pins 30 and an upper retaining pin 31.
  • the upper retaining pin 31 is provided centrally with respect to the width direction of the plate 28 and above retaining webs 32 which protrude laterally from the plate at its upper end ,
  • the upper retaining pin 31 is located centrally between the two lower retaining pins 30 in the width direction.
  • the lower retaining pins 30 are located on legs 34, which protrude from the central part of the plate 28 and a recess 36 between them. This recess 36 can be penetrated for the tension of the anchor block 14 in the receptacle 10 of the adjusting screw 6 described in connection with the previous embodiment.
  • the lower retaining pins 30 form pads 38 for the anchor stone.
  • the upper retaining pin 31 forms a stop 40.
  • the anchor stone is first arranged between the upper and lower holding pins 30, 31. In doing so, they surpass Retaining pins 30, 31 a rear contact surface of the anchor stone 14.
  • the anchor stone 14 can now be introduced into the receptacle 10.
  • a separate handling of the plate 28 is not required for this purpose. Rather, the plate 28 may be held on the anchor block 14 via the upper retaining pin 31 and the stop 40 formed by the latter.
  • the retaining webs 32 are applied against the upper edge of the upper web 20. The lowering movement of the plate 28 in the receptacle 10 has thus come to an end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (15)

  1. Dispositif de retenue pour une pierre d'ancrage céramique (14) sur une paroi de four (2) d'où dépasse au moins une patte de retenue (4), étant précisé que le dispositif de retenue comporte un moyen de logement (8) à fixer à la patte de retenue (4) et pourvu d'un logement (10) qui entoure la pierre d'ancrage (14), et des moyens de fixation (6, 28, 30, 38) grâce auxquels la pierre d'ancrage (14) est retenue dans le logement (10),
    caractérisé en ce que le moyen de fixation (6, 28, 30, 38) se compose d'un matériau qui fond à des températures qui agissent dans la zone du dispositif de retenue, lors du fonctionnement du four.
  2. Dispositif de retenue selon la revendication 1, caractérisé en ce que le moyen de fixation (28) se compose de matière plastique.
  3. Dispositif de retenue selon la revendication 1 ou 2, caractérisé par une vis de réglage (6), prévue comme moyen de fixation, qui est apte à être appliquée contre la pierre d'ancrage (14) logée dans le logement (10).
  4. Dispositif de retenue selon l'une des revendications précédentes, caractérisé par une plaque (28) qui est apte à être accrochée dans le logement (10).
  5. Dispositif de retenue selon la revendication 4, caractérisé en ce que la plaque (28) est prévue entre la vis de réglage (6) et la pierre d'ancrage (14), étant précisé que la vis de réglage (6) applique la plaque (28) contre la pierre d'ancrage (14).
  6. Dispositif de retenue selon la revendication 4 ou 5, caractérisé en ce que la plaque (28) a la forme d'un T.
  7. Dispositif de retenue selon les revendications 4 à 6, caractérisé en ce qu'il est prévu sur la plaque (28) au moins un support (38) à appliquer, du côté du bord, contre la pierre d'ancrage (14).
  8. Dispositif de retenue selon la revendication 7, caractérisé par une butée (40) qui est apte à être appliquée contre la pierre d'ancrage (14) à l'opposé du support (38) et qui dépasse de la plaque (28).
  9. Dispositif de retenue selon l'une des revendications précédentes, caractérisé en ce que la vis de réglage (6) porte le moyen de logement (8).
  10. Dispositif de retenue selon l'une des revendications précédentes, caractérisé en ce que le moyen de logement (8) comprend deux pattes (18, 20) parallèles qui sont courbées pour former une griffe et qui délimitent le logement (10), et une pièce en tôle (22) qui est disposée entre les pattes (18, 20) et qui relie celles-ci.
  11. Four avec une patte de retenue (4) qui dépasse d'une paroi de four (2) et qui est destinée à la fixation d'une pierre d'ancrage (14) d'un garnissage réfractaire de ladite paroi de four (2), caractérisé par un dispositif de retenue selon l'une des revendications précédentes, qui est prévu entre la pierre d'ancrage (14) et la patte de retenue (4).
  12. Four selon la revendication 11 dans la mesure où elle est dépendante de la revendication 3, caractérisé en ce que la vis de réglage (6) est en contact par vissage avec la patte de retenue (4).
  13. Four selon la revendication 11 ou 12, caractérisé en ce que la patte de retenue (4) est conçue comme une pièce en U qui comporte une zone centrale (4a) parallèle à la paroi de four (2).
  14. Four selon l'une des revendications 11 à 13, caractérisé en ce que le moyen de logement (8) est accroché dans une zone située entre une tête de la vis de réglage (6) et la patte de retenue (4).
  15. Four selon la revendication 14, caractérisé en ce que le moyen de retenue (8) présente un creux en V (26) dans lequel la vis de réglage (6) est apte à être introduite et qui est conçu de manière à empêcher quasiment
    un déplacement du moyen de logement (8) dans un sens horizontal perpendiculaire à la paroi de four (2).
EP20100014570 2009-11-12 2010-11-12 Dispositif de retenue pour une pierre d'ancrage céramique et four doté d'un tel dispositif de retenue Active EP2322889B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200920015430 DE202009015430U1 (de) 2009-11-12 2009-11-12 Haltevorrichtung für einen keramischen Ankerstein

Publications (2)

Publication Number Publication Date
EP2322889A1 EP2322889A1 (fr) 2011-05-18
EP2322889B1 true EP2322889B1 (fr) 2013-03-13

Family

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Application Number Title Priority Date Filing Date
EP20100014570 Active EP2322889B1 (fr) 2009-11-12 2010-11-12 Dispositif de retenue pour une pierre d'ancrage céramique et four doté d'un tel dispositif de retenue

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EP (1) EP2322889B1 (fr)
DE (1) DE202009015430U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022248412A1 (fr) 2021-05-27 2022-12-01 Refractory Intellectual Property Gmbh & Co. Kg Dispositif de retenue pour maintenir une pierre d'ancrage céramique sur une paroi de four, four comprenant un tel dispositif de retenue et procédé pour fixer un tel dispositif de retenue sur une paroi de four
WO2022248411A1 (fr) 2021-05-27 2022-12-01 Refractory Intellectual Property Gmbh & Co. Kg Dispositif de maintien pour maintenir une pierre d'ancrage en céramique sur une paroi de four, four comprenant un tel dispositif de maintien, procédé de fixation d'un tel dispositif de maintien à une paroi de four, et pierre d'ancrage en céramique pour un tel dispositif de maintien
USD1048470S1 (en) 2022-12-09 2024-10-22 Harbison Walker International Holdings, Inc. Refractory anchor brick

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416022C2 (de) * 1994-05-06 1998-04-02 Peter Dipl Ing Nebgen Armierungssystem
DE29611897U1 (de) 1996-07-09 1996-10-31 Refratechnik GmbH, 37079 Göttingen Haltevorrichtung für monolithisch ausgekleidete Ofenwände

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022248412A1 (fr) 2021-05-27 2022-12-01 Refractory Intellectual Property Gmbh & Co. Kg Dispositif de retenue pour maintenir une pierre d'ancrage céramique sur une paroi de four, four comprenant un tel dispositif de retenue et procédé pour fixer un tel dispositif de retenue sur une paroi de four
WO2022248411A1 (fr) 2021-05-27 2022-12-01 Refractory Intellectual Property Gmbh & Co. Kg Dispositif de maintien pour maintenir une pierre d'ancrage en céramique sur une paroi de four, four comprenant un tel dispositif de maintien, procédé de fixation d'un tel dispositif de maintien à une paroi de four, et pierre d'ancrage en céramique pour un tel dispositif de maintien
USD1048470S1 (en) 2022-12-09 2024-10-22 Harbison Walker International Holdings, Inc. Refractory anchor brick

Also Published As

Publication number Publication date
DE202009015430U1 (de) 2010-01-28
EP2322889A1 (fr) 2011-05-18

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