EP0236678B1 - Tragestruktur für Isolationsmaterial, insbesondere für die thermische Isolation von heissen und grossen Flächen - Google Patents

Tragestruktur für Isolationsmaterial, insbesondere für die thermische Isolation von heissen und grossen Flächen Download PDF

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Publication number
EP0236678B1
EP0236678B1 EP87100328A EP87100328A EP0236678B1 EP 0236678 B1 EP0236678 B1 EP 0236678B1 EP 87100328 A EP87100328 A EP 87100328A EP 87100328 A EP87100328 A EP 87100328A EP 0236678 B1 EP0236678 B1 EP 0236678B1
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EP
European Patent Office
Prior art keywords
sheet metal
metal elements
supporting
hot
plates
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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.)
Expired - Lifetime
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EP87100328A
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English (en)
French (fr)
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EP0236678A1 (de
Inventor
Alberto Ziccardi
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Individual
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Priority to AT87100328T priority Critical patent/ATE59697T1/de
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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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0801—Separate fastening elements
    • E04F13/0803—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements
    • E04F13/0805—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements with additional fastening elements between furring elements and the wall
    • E04F13/0808—Separate fastening elements with load-supporting elongated furring elements between wall and covering elements with additional fastening elements between furring elements and the wall adjustable in several directions one of which is perpendicular to the wall
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts

Definitions

  • the present invention relates to an insulation material bearing structure, in particular for the thermoinsulation of hot and wide surfaces, according to the preamble of claim 1.
  • thermoinsulation of the outer walls of storage tanks, stacks, heat exchangers and similar apparatuses with working temperatures ranging from 500° to 650°C is conventionally carried out by means of outer finishing sheet metal elements stiffly secured to the hot walls and mounted in a spaced position from the latter by means of supporting carpentry.
  • any body undergoing increasing temperatures will deform according to the thermal expansion coefficient thereof.
  • the sheet metal elements of the aforementioned insulating structure will thus deform owing to a double effect: firstly due to the hot wall dilations transferred through the supporting carpentry to the sheet metal elements rigidly secured to both the hot surface and said sheet metal elements, and secondly due to the flow of heat transmitted outwardly through said carpentry acting as a thermal bridge, latter deformation being very important on account of the expansion coefficient of the sheet metal material.
  • the insulating material generally used in support of the insulating structure and suitable for high temperatures is further subjected to contraction, thus increasing the disadvantages due to the hot surface expansion.
  • Breaks in the connecting members resulting from deformation stresses are the main damage caused to the sheet metal elements, the temperature of which is considerably increased due to the presence of thermic bridges, the latter further causing a loss of heat. Accordingly, in addition to the deformation caused by direct heating of these surfaces, the problem exists of protecting and safeguarding the plant staff.
  • US-A-2 435 172 (YOUNG) relates to a stack for furnaces, providing a framework for the support of outer walls mounted in a spaced relationship in respect of an inner refractory wall.
  • US-A-4 369 032 (LOWRANCE) describes a reheat furnace comprising a plurality of resilient means to avoid overloading of a rigid frame mounted on refractory elements.
  • GB-A-829 201 ( LACLEDE-CHRISTY CO) relates to suspended refractory linings for furnaces.
  • FR-A-1 413 235 (DIDIER-WERKE AG) describes the construction of walls for furnaces.
  • DE-A-3 032 359 (LOOS) and LU-A-68 748 (BPB INDUSTRIES LTD) describe metal structures for supporting coat members of building walls.
  • the insulation material bearing structure as described in document LU-A-68748 includes a rail mounted horizontally on the hot surface. Within the rail, a spacer is so arranged as to slide in horizontal direction, whereas on the side of the spacer facing away from the rail, a groove is formed, extending in vertical direction. Within the groove is a vertical sliding rail, bearing the outer finishing sheet elements.
  • the insulation material bearing structure as shown in document LU-A-68 748 is suitable for mounting cover means on the walls of buildings and for receiving the expansion of material as caused by atmospheric temperature or sunlight.
  • said support structures may be advantageously used at low temperatures (ranging within room temperature), they are obviously inadequate in view of temperature increases such as in furnaces or heat exchangers.
  • the connecting elements of the structure are quickly prone to deformation as a result of high temperatures and are generally adapted for mounting on flat walls only.
  • the stirrup and hot surface directly engage each other; concomitantly, dimensional movement of said stirrup and hot surface due to thermal expansion of the latter is allowed for whilst keeping said insulating sheet metal elements in a stationery position.
  • the means for accommodating dimensional movement of the structure of the invention consist of a plurality of vertical sections or rods provided on one side with connecting devices for engaging said sheet metal elements as well as allowing for horizontal displacement of said rods in respect of said sheet metal elements and, on the other side, with brackets or stirrups for the engagement of the hot surface in vertical sliding relation to same bearing structure.
  • horizontal support guides or rails secured to said sheet metal elements are provided, the guides as stated interacting with the relevant engaging means of the rods.
  • the aforementioned means adapted to connect said rods and sheet metal elements consist of essentially C cross-sectioned plates, the lower end of which is provided with an outer vertical stop, said plates further comprising a plurality of rolling contact bearings mounted on the vertical and lower horizontal sides of said C cross-sections, said bearings permitting said horizontal guides of the sheet metal elements to slide within the shaped plates of the rods, as mentioned.
  • Said means for connecting said rods and sheet metal elements consist - in accordance with a characteristic embodiment of the invention particularly adapted to the thermoinsulation of curved surfaces - of shaped metal plates in sliding engagement with said support guides of the outer sheet metal elements; resilient means can further be provided to allow for variations in the distance between said rods and said sheet metal elements due to the radially directed thermal expansion of the hot surface.
  • the invention shows the distinct advantage of allowing for thermal expansion and contraction of the hot surfaces to be insulated by means of a particular connection between the rods of the bearing structure and the same outer sheet metal elements.
  • Such characteristic connection permits the use of outer sheet metal elements having a continuous surface to thermoinsulate flat and curved hot surfaces, preventing any inner stress capable of deforming, detaching or breaking the outer sheet metal elements.
  • thermoinsulating material suitably arranged within the structure of the invention keep the heat transfer to a minimum, thus further diminishing heat dispersion.
  • the present invention shows the advantage of the supporting structure resisting high temperatures, accordingly being mounted on the hot wall being insulated without any intermediate layer of refractory material being required. Consequently, the structure of the invention allows for a higher degree of deformation in all directions and, thus, may work at higher temperatures than the conventional structures.
  • the bearing structure as shown in figures 1 to 5 is particularly suitable for the thermoinsulation of flat surfaces with the one as shown in fig. 6 to 8 having been adapted to thermoinsulate curved surfaces (e.g. the outer walls of storage tanks and converters).
  • the bearing structure of the invention essentially consists of a supporting spacer and outer finishing sheet metal elements.
  • the supporting spacer comprises a plurality of vertical sections or rods 1 made of metallic material and mounted in a parallel manner in front of the hot surface to be insulated 2.
  • the side of said rods facing said surface 2 comprises a plurality of supporting brackets or stirrups 3 (fig. 3 and 4), the one wide of which is welded on the surface 2 itself whereas the opposite side of the brackets are secured to the rods 1 by means of grooved, smalls disks which mounted slidingly in a corresponding slit provided on the side of rod 1 facing the hot surface 2.
  • Gaskets of ceramic material 5 are arranged interposed between the components of the stirrup 3 and the relevant disk 4 to reduce the heat transfer towards the bearing structure.
  • At least one shaped plate 6 is secured, preferably to the upper portion of each rod.
  • the plates 6 are made of metallic C cross-sectioned elements (fig. 4), the lower end of which comprise an outer vertical member 7.
  • the vertical side 8 of the plates is provided with two rolling contact bearings 9, mounted horizontally and aligned, the axis of rotation of which being perpendicularly directed to the axis of rod 1 carrying said plates.
  • Each of the bearings 9 further comprises a peripheral groove 10.
  • the lower horizontal side 11 of the plates 6, however, is equipped with a rolling contact bearing 12, the axis of rotation of which is directed in a parallel manner to the axis of the corresponding rod 1.
  • the outer finishing sheet metal element comprises a corrugated sheet 13 made of aluminium, the inner side of which faces the plates 6 (and which is mounted at the same height), being provided with a supporting metal guide or rail 14.
  • the latter essentially consists of a shaped metal section (approximately G cross-sectioned) (fig. 4), the upper end 15 of which is positioned upon assembly of the structure in groove 10 of the bearings 9, the lower and reverse base 16 thereof, however, being mounted on the inner side of the vertical member 7.
  • the bearing 12 with a vertical axis of rotation is mounted on the corresponding plate in such a way that the outer edge of said bearing protrudes from the body plate; the weight of the sheet metal element 13 which is retained by engagement of the shaped elements of the plates 6 with the rails 14 will thus partly be supported by the bearings 12, the latter maintaining said sheet metal element in vertical position and thereby drastically eliminating sliding friction.
  • the supporting plate 17 of fig. 5 as mounted on the lower portion of the rods 1 differs from plate 6, as previously described, by lacking bearings as well as having a differently sectioned shape. Said plate 17 acts as a fixed point within the support structure and guides the thermal expansion of the structure in the desired direction.
  • the thermal insulating material 18 ( flexible ceramic fibers and mineral wool) is positioned in the hollow space between the hot surface 2 and the sheet metal element 13.
  • the vertical expansion of the hot surface 2 is accommodated by means of a sliding fit between the brackets 3 and the rods 1; the sheet metal elements 13 not being influenced by the horizontal displacement of the surface 2 (and subsequently of the rods 1) due to the particular sliding fit between the plates 6 and the supporting rails 14.
  • the embodiment of fig. 6 to 8 relates to a curved hot surface 2.
  • the bearing structure 2 is provided with rods 1 and mounted in front of the surface 2 and retained in that position by means of brackets 3 and the relevant small, grooved disks 4.
  • the side of the rods 1 facing the sheet metal element 13 comprises C-shaped plates 19, similar to the plates 6 as already described but lacking any retaining members and bearings.
  • the sheet metal element 13 carries horizontal guide means mounted at the same height as plates 19 and adapted to slide along the latter.
  • Said guide means consist of light lattice beams 20 horizontally secured to the sheet metal element 13; the portion of said lattice beam 20 engaging plates 19 of the rods 1 being covered by plates 21.
  • Telescopic spring members 22, allowing for radial displacement of the bearing structure relative to the elements 13, are provided to avoid the sheet metal element 13 disengaging from the structure of the rods 1.
  • the hollow space between the surface 2 and the sheet metal element 13 is filled with thermal insulating material.
  • Both of the aforementioned embodiments may comprise a single sheet metal element with an uninterrupted and smooth surface; nonetheless, the dimensional movement of the hot surface is not transmitted to the outer sheet metal element (which is kept in a stationery position in respect of the relevant support structure).

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Building Environments (AREA)
  • Insulating Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Claims (8)

1. Isoliermaterial-Tragkonstruktion für heiße und ausge­dehnte Flächen (2) von Kaminen, Wärmetauschern u.dgl., die umfaßt
eine Mehrzahl von ersten Verbindungseinrichtungen (3, 4) zur Abstützung eines Abstandshalters (1) an der genann­ten heißen Fläche (2) derart, daß er mit Bezug zu der genannten heißen Fläche längs einer ersten Gleitrich­tung verschiebbar ist, und
eine Mehrzahl von zweiten Verbindungseinrichtungen (6) zur Abstützung von äußeren Abschluß-Blechelementen (13) an dem besagten Abstandshalter (1) derart, daß sie mit Bezug zu dem besagten Abstandshalter (1) längs einer zweiten, zur ersten Gleitrichtung rechtwinkligen Gleit­richtung verschiebbar sind,
dadurch gekennzeichnet, daß
der besagte Abstandshalter eine vertikale Stange (1) mit einem an ihrer der heißen Fläche (2) gegenüberlie­genden Seite ausgebildeten Längsschlitz ist; und
daß jede der erwähnten ersten Verbindungseinrichtungen einen an der heißen Fläche (2) befestigten und eine verschiebbar innerhalb des besagten Längsschlitzes der genannten vertikalen Stange (1) aufgenommene Scheibe (4) tragenden Bügel (3) umfaßt,
wobei zwischen den besagten Bügel (3) und die genannte vertikale Stange (1) Zwischenlagescheiben (5) eingefügt sind, um die Wärmeausbreitung von der heißen Fläche (2) auf die Tragkonstruktion zu vermindern.
2. Konstruktion nach Anspruch 1, wobei die erwähnten zwei­ten Verbindungseinrichtungen aus profilierten Platten (6) bestehen, die die stützenden Führungen (14) der Blechelemente (13) und die genannten Stangen (1) für eine freie Horizontalverlagerung verbinden.
3. Konstruktion nach Anspruch 2, wobei ferner profilierte, an den besagten Blechelementen (13) einwirkende Platten (17) vorgesehen sind und diese Platten (17) als ein Festpunkt der erwähnten Konstruktion in der horizonta­len Ebene dienen, um die Verlagerung der Konstruktion in vorbestimmte Richtungen zu leiten.
4. Konstruktion nach Anspruch 2, wobei die genannten pro­filierten Platten (6) von C-förmigem Querschnitt sind sowie einen am unteren Ende (11) dieses Querschnitts befindlichen äußeren, vertikalen Anschlag (7) haben und wobei die genannten Platten (6) des weiteren eine Mehrzahl von jeweils an den vertikalen (8) sowie unte­ren horizontalen Seiten (11) des besagten C-förmigen Querschnitts befestigten Wälzkontaktlagern (9, 12) um­fassen, welche Lager den erwähnten horizontalen Führun­gen (14, 15) der Blechelemente (13) ein Verschieben in­nerhalb der profilierten Platten (6) ermöglichen.
5. Konstruktion nach Anspruch 4, wobei eine Kehle (10) an der Außenumfangsfläche der besagten Lager (9) ausge­bildet ist, die mit den erwähnten Führungen (14, 15) der äußeren Blechelemente (13) in Eingriff ist.
6. Konstruktion nach Anspruch 5, wobei die erwähnten stüt­zenden Führungen aus geformten, horizontalen Profilen (14) bestehen, deren Gestalt zu derjenigen der vorer­wähnten Stangenplatten (6), mit denen sie ineinander­greifen, komplementär ist, die genannten Profile (14) im wesentlichen von G-Querschnitt sind, ihr oberes Ende (15) innerhalb der besagten Kehle (10) der Lager (9) angeordnet ist, ihr unteres Basisteil (16) gegen den genannten Anschlag (7) der profilierten Platten (6) in Anlage gebracht ist und eine Lage eines flexiblen Iso­liermaterials (18) in den Hohlraum zwischen der erwähn­ten heißen Fläche (2) sowie dem Blechelement (13) ein­gefüllt ist.
7. Konstruktion nach Anspruch 1, wobei die erwähnten zwei­ten Verbindungseinrichtungen aus profilierten Platten (19), die gleitend mit stützenden Führungen (21) der vorerwähnten äußeren Blechelemente (13) verbunden sind, und elastischen Mitteln (22), welche zur Aufnahme von auf die radial gerichteten Wärmedehnungen der heißen, gekrümmten Fläche zurückzuführenden Veränderungen im Abstand zwischen den genannten Stangen und Blechelemen­ten (13) geeignet sind, bestehen.
8. Konstruktion nach Anspruch 7, wobei die genannten ela­stischen Mittel aus Teleskop-Federelementen (22) beste­hen, die an einer Seite der besagten Abstandshalter (1) sowie an den Blechelementen (13) an der anderen Seite befestigt sind, die erwähnten horizontalen, stüt­zenden Führungen aus leichten Gitterträgern (20), die schützende Bügel (21) an der mit den genannten profi­lierten Platten (19) der besagten Stangen (1) zum Ein­griff gelangen Fläche haben, bestehen und eine Lage eines flexiblen Isoliermaterials (18) innerhalb des Hohlraumes zwischen der erwähnten heißen Fläche (2) so­wie dem Blechelement (13) angeordnet ist.
EP87100328A 1986-01-28 1987-01-13 Tragestruktur für Isolationsmaterial, insbesondere für die thermische Isolation von heissen und grossen Flächen Expired - Lifetime EP0236678B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100328T ATE59697T1 (de) 1986-01-28 1987-01-13 Tragestruktur fuer isolationsmaterial, insbesondere fuer die thermische isolation von heissen und grossen flaechen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1921086 1986-01-28
IT19210/86A IT1189057B (it) 1986-01-28 1986-01-28 Struttura di sostegno per materiale di coibentazione,in particolare per l'isolamento termico di superfici estese a temperature elevata

Publications (2)

Publication Number Publication Date
EP0236678A1 EP0236678A1 (de) 1987-09-16
EP0236678B1 true EP0236678B1 (de) 1991-01-02

Family

ID=11155825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100328A Expired - Lifetime EP0236678B1 (de) 1986-01-28 1987-01-13 Tragestruktur für Isolationsmaterial, insbesondere für die thermische Isolation von heissen und grossen Flächen

Country Status (5)

Country Link
EP (1) EP0236678B1 (de)
AT (1) ATE59697T1 (de)
DE (1) DE3766852D1 (de)
ES (1) ES2019886B3 (de)
IT (1) IT1189057B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH679685A5 (de) * 1989-05-10 1992-03-31 Constral Ag

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435172A (en) * 1945-03-31 1948-01-27 Chicago Fire Brick Co Stack for furnaces
GB829201A (en) * 1956-10-05 1960-03-02 Laclede Christy Company Suspended furnace wall construction
FR1413235A (fr) * 1964-09-23 1965-10-08 Didier Werke Ag Parois de foyer, en particulier parois postérieures de fours industriels
GB1455556A (en) * 1972-11-07 1976-11-17 Bpb Industries Ltd Wall linings
US4369032A (en) * 1979-07-02 1983-01-18 Inland Steel Company Reheat furnace
DE3032359C2 (de) * 1980-08-28 1986-06-12 Hermann 6380 Bad Homburg Loos Unterkonstruktion zur Befestigung einer Wandbekleidung

Also Published As

Publication number Publication date
IT1189057B (it) 1988-01-28
DE3766852D1 (de) 1991-02-07
EP0236678A1 (de) 1987-09-16
ES2019886B3 (es) 1991-07-16
ATE59697T1 (de) 1991-01-15
IT8619210A0 (it) 1986-01-28

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