EP4124814A1 - Porte-module d'isolation destiné au revêtement de four - Google Patents

Porte-module d'isolation destiné au revêtement de four Download PDF

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Publication number
EP4124814A1
EP4124814A1 EP22185453.2A EP22185453A EP4124814A1 EP 4124814 A1 EP4124814 A1 EP 4124814A1 EP 22185453 A EP22185453 A EP 22185453A EP 4124814 A1 EP4124814 A1 EP 4124814A1
Authority
EP
European Patent Office
Prior art keywords
insulation
furnace
insulation module
retaining
base plate
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.)
Withdrawn
Application number
EP22185453.2A
Other languages
German (de)
English (en)
Inventor
Stephan Holze
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.)
Rath GmbH
Original Assignee
Rath GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rath GmbH filed Critical Rath GmbH
Publication of EP4124814A1 publication Critical patent/EP4124814A1/fr
Withdrawn legal-status Critical Current

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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
    • F27D1/144—Supports for ceramic fibre materials

Definitions

  • the present invention relates to an insulation module carrier for furnace lining, comprising a base plate with at least one fastening device for attaching the insulation module carrier to an inner furnace wall and at least two support arms pointing from the top side of the base plate in essentially the same spatial direction, on each of which at least one holding mandrel for fastening a block of insulation material is attached .
  • the invention further relates to an insulation module with such an insulation module carrier, a furnace insulation comprising at least two such insulation modules and a method for producing such a furnace insulation.
  • Furnaces which are mainly run in batch mode at operating temperatures between 1000 and 1650 °C and are therefore exposed to strong temperature changes, are often lined with modules made of high-temperature wool (HTW). Even stoves that do not require high storage heat in the wall area are insulated with the same. These typically consist of an insulation module carrier to which the insulation material blocks made of high-temperature wool are attached.
  • high-temperature wool there are basically three different types of high-temperature wool, namely alkaline earth wool (AES), aluminum silicate wool (ASW) or ceramic fibers (RCF) and polycrystalline wool (PCW).
  • the alkaline earth wools are mostly used at temperatures up to approx. 1200 °C, the aluminum silicate wools and ceramic fibers up to 1300 °C and the polycrystalline wools up to 1650 °C. Combinations of different wool types are possible. For example, at temperatures around 1400 °C, PCW are used in the hot area and ASW in the cold area. When using high-temperature wool, the chemical atmospheres are usually also taken into account.
  • So-called blanket pieces made of high-temperature wool are pressed into modules as linings in order to compensate for shrinkage of the materials due to crystallization effects and are mounted on the outer housing of the furnace with the help of insulation module carriers.
  • insulation module carriers For thermal and cost reasons, rear insulation a few centimeters thick can also be used in front of the steel casing of the stove.
  • Common materials here are, for example, calcium silicate boards.
  • HTW modules have low thermal conductivity, low heat capacities and high resistance to temperature changes and can therefore be used for energy-efficient operation of furnaces.
  • the insulation module carrier also known as the anchor
  • the anchor is supplied separately and only inserted into the fiber module on site.
  • the anchor is fastened with a washer and nut by screwing it to the inner wall of the furnace, which is very time-consuming.
  • the backing insulation typically used is not compressible and gaps can form between the backing insulation and the modules, particularly on ceilings where the modules sink slightly under their own weight.
  • DE 19 76 236 U discloses a refractory lining for interior walls and/or the interior ceilings of an industrial furnace.
  • the working lining of the lining which consists of ramming mass and faces the combustion chamber, is anchored by several ceramic anchors which are held in a vertical or radial direction between two pliers-like ceramic blocks connected to the outer wall of the furnace. These holding blocks are walled into the masonry arranged between the outer wall of the furnace and the working lining and protrude from this masonry only as far as is necessary to clamp the movable ceramic holders located in the working lining.
  • the ceramic anchors are provided on two opposite outer surfaces with trapezoidal grooves embedded in the anchor material and on the other two outer surfaces with attached ribs and the ends facing away from the combustion chamber of the anchors are arranged so that they can move vertically or horizontally between two ceramic blocks, with the clamps each have a trapezoidal rib on one side in the area of the head ends and that the clamps are located in the masonry arranged between the outer wall of the furnace and the rammed working lining, with the exception of the head ends intended for receiving the anchors.
  • the object of the present invention was therefore to provide an insulation module carrier that can be installed more easily.
  • the insulation module carrier should allow the production of insulation modules with which the best possible insulating oven insulation can be produced, in particular those in which the modules are arranged in a checkerboard system can become.
  • the insulation module carrier according to the invention allows the production of insulation modules that can be installed both in the surfaces and in the edge areas and thus makes special end modules superfluous.
  • the insulation module with the insulation module carrier according to the invention should be able to be delivered pre-assembled to the construction site, so that on-site assembly of the insulation modules is no longer necessary.
  • an insulation module carrier for furnace lining comprising a base plate with at least one fastening device for attaching the insulation module carrier to an inner furnace wall and at least two support arms pointing from the top side of the base plate in essentially the same spatial direction, on each of which at least one holding mandrel for fastening a block of insulation material is attached, wherein the insulation module carrier is characterized in that the fastening device has a latching device which can be engaged and releasably connected to a retaining bolt which can be fastened to the inner wall of the furnace.
  • essentially the same spatial direction means that the support arms are arranged parallel to one another, with deviations of, for example, 15° or less, preferably 10° or less, being able to occur.
  • the present invention is based on the finding that the fact that the fastening device has a latching device which can be engaged and releasably connected to a retaining bolt that can be fastened to the inner wall of the furnace means that assembly can take place in a much more time-saving manner. Not only is there no screwing, but no special tools are required for assembly.
  • retaining bolts for example threaded bolts, are welded onto the inner wall of the furnace as later central fastening points of the insulation module. The already pre-assembled insulation module then only needs to be pushed onto the threaded bolt, with the insulation module being fixed by the latching device.
  • the latching device can be designed in the shape of a dome, for example made of sheet metal bent in a dome shape, so that this component has spring elasticity and can be pressed onto the threaded bolt with a certain amount of pretension.
  • the latching device can, to a certain extent, better accommodate temperature-related linear expansion and the resulting stresses.
  • a further advantage is that with the insulation module carrier according to the invention, an arrangement of the insulation modules in a “chessboard system” is possible, in which the following module is arranged rotated by 90°. Among other things, this can reduce the lateral heat propagation in the furnace insulation.
  • the insulation module carrier (comb anchor) is first screwed onto the inner wall of the furnace and only then are the insulation material blocks pushed laterally onto the forks of the comb anchor.
  • the blocks of insulating material can tilt unnoticed, resulting in cavities between the backing insulation and the blocks of insulating material as well as between the two blocks of insulating material pushed onto a comb anchor, particularly in the area of the backing insulation.
  • the already pre-assembled module is pushed directly onto the retaining bolt by the integrated anchor and can thus be pressed and clicked in with the entire support against the rear insulation.
  • the latching device has a dome-shaped elevation pointing away from the upper side of the base plate with a central opening for the retaining bolt.
  • a passage opening for the retaining bolt is provided below the central opening in the base plate.
  • at least one incision preferably four incisions, which are more preferably arranged in the shape of a cross, can advantageously branch off from the central opening.
  • the incision can end in a preferably circular recess at its end opposite the central opening. This enables it to be pushed particularly easily onto the retaining bolt, in particular the threaded bolt.
  • the material of the base plate, the fastening device, the support arms and the holding mandrels can be selected independently of one another from steel, stainless steel, in particular 1.4841, or also nickel-based alloys such as Inconel ® alloys, in particular Inconel ® 600 and Inconel ® 718, which is preferably heated at temperatures of 200 °C to 500 °C is used.
  • the material of the base plate, the fastening device, the support arms and the holding mandrels is preferably the same.
  • the support arms are made from sheet metal.
  • the base plate can also be made of sheet metal and the support arms can be formed by cutting and preferably folding the sheet metal at right angles. This is very advantageous because it allows the majority of the insulation module carrier to be manufactured in a simple manner in a few work steps from a single sheet metal section.
  • the retaining mandrel of one support arm is aligned essentially parallel to the retaining mandrel of the other support arm. This makes it easier to slide on the insulation made of high-temperature wool.
  • each support arm is equipped with two retaining pins aligned with one another.
  • Another object of the present invention relates to an insulation module comprising an insulation module carrier according to the invention and an insulation material block which is attached to the insulation module carrier, the insulation material block preferably having a square or rectangular base area on the side facing the base plate of the insulation module carrier.
  • the material of the insulating material block can be selected from refractory vacuum molded parts or pressed high-temperature wool, with the high-temperature wool preferably used according to the invention being selected from alkaline earth silicate wool (AES), in particular from calcium-magnesium silicate wool, calcium silicate wool and magnesium silicate wool, from aluminum silicate wool (ASW), as well as aluminum silicate zirconium wool and polycrystalline wool (PCW) or mixtures of these.
  • AES alkaline earth silicate wool
  • ASW aluminum silicate wool
  • PCW polycrystalline wool
  • the block of insulating material is particularly preferably formed from high-temperature wool, particularly preferably from pieces of high-temperature wool mat pressed together, with the block of insulating material being able to comprise a retaining cord with which the block of insulating material can be pretensioned for assembly and, after assembly has been completed, can be relaxed by cutting through the retaining cord.
  • the retaining cord can be designed as a round cord or else in the form of a band, for example.
  • the pressing can also be realized by mounting plates.
  • the insulating material block is provided on at least two opposite side surfaces pointing away from the base plate of the insulation module carrier, each with a removable mounting plate, which is encompassed by the retaining cord and with which the insulating material block is pretensioned for assembly and, after assembly has been completed, by cutting through the retaining cord and removing the mounting plates relaxation can be brought.
  • the mounting plates are preferably dimensioned in such a way that they cover the side surfaces of the insulating material block as completely as possible.
  • the mounting plates are made of plastic, for example.
  • the block of insulating material can be formed, for example, from at least two, preferably from 10 or more, layers of high-temperature wool lying one on top of the other.
  • this has a detachable tubular assembly insert, which is aligned with the passage opening of the base plate and the central opening of the locking device and extends essentially vertically through the insulating material block, pointing away from the base plate, the tubular assembly insert preferably being formed by a plastic tube is.
  • the tubular mounting insert can be made of a cardboard, ceramic or metal tube.
  • Another object of the present invention is directed to a furnace insulation, comprising at least two, preferably a large number of retaining bolts fastened essentially perpendicularly to the inner wall of the furnace and insulation modules according to the invention fastened thereto, as well as optionally rear insulation provided between the inner wall of the furnace and the insulation modules, for example made of vacuum molded parts or calcium silicate plates , wherein adjacent insulation modules are preferably arranged rotated by substantially 90 ° to each other.
  • substantially 90° means a possible deviation of up to +/-10°, preferably of up to +/-5°, more preferably of up to +/-2°.
  • a parallel arrangement is also possible.
  • the retaining bolt is designed as a threaded bolt.
  • other configurations are also possible, which allow engagement with the latching device of the insulation module carrier, such as bolts in a horizontal corrugation.
  • the retaining bolt preferably has a recess for centering an assembly aid at its end opposite the furnace inner wall. This makes assembly much easier, since the assembly personnel can hardly visually check whether the assembly aid is seated in the middle.
  • an insulating mat can be provided between two horizontal rows of insulation modules, which is preferably cut in the shape of a staircase at its abutting edges to the adjacent mat. This further increases the insulating effect.
  • the step-shaped cutting makes it more difficult for hot gases to migrate out of the furnace and thus for the formation of heat bridges, which means that the insulating effect is also increased.
  • the insulation modules fitted in the corners of the furnace are of identical construction compared to those on FIG the oven walls. As already explained above, this is not readily possible in the systems known from the prior art.
  • step d If side plates are used instead of the retaining cord, these are pulled out at the end of step d).
  • an insulation module carrier 1 for lining the furnace is shown, in 1 in 3-dimensional representation from diagonally above, in 2 in top view, in 3 in step view along the line A - A 2 and in 4 in step view along the line B - B 2 .
  • the insulation module carrier 1 is made of stainless steel and includes a base plate 2 with a fastening device 3 for attaching the insulation module carrier 1 to an inner wall 31 of the furnace and two support arms 4a, 4b extending at right angles from the upper side of the base plate 2.
  • Two holding pins 5a, 5a', 5b, 5b' are attached to each support arm 4a, 4b for fastening an insulating material block 6, with the holding pins 5a, 5a' of one support arm 4a being essentially parallel to the holding pins 5b, 5b' of the other support arm 4b are aligned.
  • the holding mandrels 5a, 5a' of the first support arm 4a are aligned with one another and the holding mandrels 5b, 5b' of the second support arm 4b are aligned with one another.
  • the holding mandrels 5a, 5a', 5b, 5b' are designed to taper at their free end, which makes it easier to slip on a block of insulating material 6.
  • the fastening device 3 has a latching device 7 which can be engaged and releasably connected to a retaining bolt 8 which can be fastened to the inner wall 31 of the furnace.
  • the retaining bolt 8 has an external thread into which the edges of the latching device 7 engage.
  • the latching device 7 has a dome-shaped elevation 9 pointing away from the upper side of the base plate 2 and having a central opening 10 for the retaining bolt 8 .
  • a passage opening 11 for the retaining bolt 8 is provided in the base plate 2 below the central opening 10 .
  • Four incisions 12 proceed from the central opening 10, which are further arranged in the shape of a cross and each end in a circular recess 13 at the end opposite the central opening 10.
  • the insulation module carrier 1 is produced from sheet metal, with the support arms 4a, 4b being formed by cutting and preferably folding the sheet metal at right angles. The remaining part of the sheet metal then forms the base plate 2, resulting in material waste. The holding mandrels 5a, 5a', 5b, 5b' are then welded to the support arms 4a, 4b and the fastening device 3 to the base plate 2.
  • FIG 5 shows an insulation material block 6 made of five superimposed layers of pressed high-temperature wool, which is pushed onto the holding mandrels 5a, 5a', 5b, 5b' of the insulation module carrier 1, so that an insulation module 20 is formed.
  • the block of insulating material 6 is prestressed for assembly by means of a plurality of retaining cords 14 . After assembly has been completed, the retaining cords 14 are severed and the insulating material block 6 is thus relaxed. As a result, the spaces between the insulation modules 20 that arise during the installation of a furnace insulation 30 are closed.
  • 6 1 shows a furnace insulation 30 made up of a large number of insulation modules 20 according to the invention fastened to an inner furnace wall 31 .
  • Rear insulation 32 is also fitted between the inner furnace wall 31 and the insulation modules 20 .
  • An insulating mat 33 is provided between each two horizontal rows of insulation modules 20 .
  • the retaining bolts 8 are first fastened in predetermined positions on the furnace inner wall 31 by means of spot welding.
  • the positioning can take place by means of a cross-line laser or by means of a batter board with a chalk line, with the aid of which the grid can be transferred to the inner wall 31 of the furnace.
  • a rod-shaped assembly aid equipped with a centering mandrel can be positioned in a recess 15 of the retaining bolt 8 .
  • the insulation module 20 has a detachable tubular assembly insert in the form of a plastic tube, which is aligned with the passage opening 11 of the base plate 2 and the central opening 10 of the latching device 7 and is essentially vertical extending from the base plate 2 through the insulating material block 6 pointing away.
  • the insulation module 20 is now pushed onto the rod-shaped assembly aid with the plastic tube as a guide and pressed onto the inner wall 31 of the oven, so that the insulation module 20 is fixed by bringing the latching device 7 into engagement with the retaining bolt 8 .
  • the locking device 7 is guided precisely onto the retaining bolt 8 through the interaction of the plastic tube and the assembly aid.
  • the assembly aid and the tubular assembly insert are then removed. Since the insulating material block 6 is prestressed, the opening for the plastic pipe closes by itself after it has been removed.
  • an isolation module 21 according to the prior art is shown in a three-dimensional representation obliquely from above.
  • the insulation module 21, which is not according to the invention, comprises an insulation module carrier 21 to be screwed onto the inner wall 31 of the oven and an insulation material block 6 attached thereto.
  • the insulation material block 6 is shown as transparent for reasons of clarity.
  • the insulation module carrier 20 according to the invention is shown in the same perspective for direct comparison.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP22185453.2A 2021-07-26 2022-07-18 Porte-module d'isolation destiné au revêtement de four Withdrawn EP4124814A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021119245.5A DE102021119245A1 (de) 2021-07-26 2021-07-26 Isolationsmodulträger zur Ofenauskleidung

Publications (1)

Publication Number Publication Date
EP4124814A1 true EP4124814A1 (fr) 2023-02-01

Family

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EP22185453.2A Withdrawn EP4124814A1 (fr) 2021-07-26 2022-07-18 Porte-module d'isolation destiné au revêtement de four

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EP (1) EP4124814A1 (fr)
DE (1) DE102021119245A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1976236U (de) 1965-11-29 1968-01-04 Plibrico Co Gmbh Mehrteilige keramische verankerung fuer industrieoefen u. dgl.
DE3874560T2 (de) * 1987-01-30 1993-02-04 Carborundum Co Aus bauteilen bestehende ofenauskleidung und werkstoffsystem dafuer.
DE20316543U1 (de) * 2003-10-28 2004-07-15 Burwitz Feuerungsbau Gmbh Wand- und/oder Deckenaufbau, sowie Wandmodule und Befestigungsvorrichtungen hierfür

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403767A1 (de) 1984-02-03 1985-08-08 Plibrico Co GmbH, 4000 Düsseldorf Feuerfeste auskleidung mit faserblockschicht
DE202009006479U1 (de) 2009-05-04 2009-09-10 Imerys Magyarország Tüzállóanyaggyártó KFT Feuerfestplattenanordnung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1976236U (de) 1965-11-29 1968-01-04 Plibrico Co Gmbh Mehrteilige keramische verankerung fuer industrieoefen u. dgl.
DE3874560T2 (de) * 1987-01-30 1993-02-04 Carborundum Co Aus bauteilen bestehende ofenauskleidung und werkstoffsystem dafuer.
DE20316543U1 (de) * 2003-10-28 2004-07-15 Burwitz Feuerungsbau Gmbh Wand- und/oder Deckenaufbau, sowie Wandmodule und Befestigungsvorrichtungen hierfür

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Publication number Publication date
DE102021119245A1 (de) 2023-01-26

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