Ceramic fiber insulation module and method of assembly

• US 4,829,734 A
• Filed: 10/31/1986
• Issued: 05/16/1989
• Est. Priority Date: 10/31/1986
• Status: Expired due to Fees

• Current Assignee: Eltech Systems Corporation (Industrie De Nora S.p.A)
• Original Assignee: Eltech Systems Corporation (Industrie De Nora S.p.A)
• Inventors: Schraff, Raymond J.
• Primary Examiner(s): Murtagh, John E.
• Application Number:
  US06/926,077
• Time in Patent Office: 928 Days
• Field of Search: 52/506, 52/509, 52/232, 52/404, 52/741, 52/748, 110/331, 110/336, 110/337, 110/338, 110/339, 428/920
• US Class Current: 52/404.5
• CPC Class Codes: E04B 1/78 Heat insulating elements E04B1/7662 takes precedence

Abstract

A ceramic fiber insulation module is now provided from ceramic fiber units of finite length. The formation of the module can be initiated by folding an individual ceramic fiber strip or blanket, which is in unfolded condition, in a manner doubling the ends over on themselves. Then the double-over ends are folded up towards each other. As a result, the module, in cutaway, may be described as a "B-fold". The module presents an unbroken blanket surface for the hotface. The module also lends itself to fastening by cross-tying, between adjacent modules, to a backing member. Cross-tying can provide joint compression at the through joints which occur between modules.

Claims

1. A resilient ceramic fiber insulation module from a unit of fiber of finite length, said fiber unit being at least substantially in folded condition in said module, with the module being adapted for ease of attachment to an external support as well as for side-by-side compression of adjacent modules on attachment, the filter of said module consisting essentially of:

an unbroken bottom layer of ceramic fiber, the bottom outer surface thereof providing the module hot face, the center of the bottom layer in the folded condition being at least substantially the center of said fiber unit when it is in unfolded condition, which unit then extends continuously to;

two spaced apart and unbroken vertical side members of ceramic fiber, each side member having an outer face for contact with an adjacent module, which vertical side members together with said bottom layer form a U-shape, the remaining portions of said fiber unit from each side member being doubled over inwardly and downwardly, back against each vertical side thereby forming

two depending ceramic fiber interior leg members, within the aperture of said U-shape and at least substantially filling said U-shape aperture, each leg member being doubled back against the adjacent vertical side members and forming a joint between each leg member and its adjacent vertical side member, as well as being double-backed in face-to-face contact with each other, thereby providing

a top module cold face for positioning adjacent an external support, said module cold face having two folds provided by said doubled over fiber unit portions, and with there being a central joint at the cold face positioned between said double-backed interior leg members.

2. The ceramic fiber module of claim 1, wherein said fiber unit in unfolded condition has at least substantially uniform thickness.

3. The ceramic fiber module of claim 1, wherein said interior leg members contact the interior face of said bottom layer.

4. The ceramic fiber module of claim 1, wherein a support structure for said module is contained within at least one of said joints between adjacent leg and side members.

5. The ceramic fiber module of claim 4, wherein said support structure comprises an elongated metal element extending along the upper portion of said joint.

6. The ceramic fiber module of claim 5, wherein said elongated metal element is connected by at least one fastening element to a backing member.

7. The ceramic fiber module of claim 6, wherein said backing member is a perforated metal member.

8. The ceramic fiber module of claim 5, wherein each leg-and-side member joint contains a rod and each rod is connected by a fastening element to a backing member.

9. The method of preparing a ceramic fiber insulating assembly adapted for reduced heat loss at the through joints between fiber modules contained within said assembly, which method comprises:

establishing a multitude of ceramic fiber insulation modules in side-by-side relationship adjacent to a backing member, with adjacent modules having inter-module through joints and having module vertical side members forming said joints, with the side members being folded away from said joint forming a ceramic fiber fold;

providing said folds with internal support elements at least for the folds adjacent the through joints; and

connecting such internal support element to said backing member by cross-tying fastening elements from a support element across an inter-module through joint thereby compressing adjacent modules together for reducing heat loss through the insulation assembly.

11. The method of claim 9, wherein said connecting for cross-typing fastening elements connect modules selected from the group consisting of U-fold, S-fold, W-fold and B-shape modules, as well as mixtures thereof.

10. An insulating assembly containing a multitude of individual fiber units in module form and side-by-side position, said assembly being adapted for use as ceramic fiber insulation structure, which assembly comprises:

a support structure positioned externally to said modules;

internal support elements interengaged within folds in said ceramic fiber modules;

fastening elements connecting said support elements within the ceramic fiber modules to said external support structure by cross-typing from said support elements across an inter-module through joint to said external support structure; and

ceramic fiber modules, arranged side-by-side against one another, each module comprising;

an unbroken bottom layer of ceramic fiber, the bottom outer surface thereof providing the module hot face, the center of the bottom layer when the fiber is in folded condition being at least substantially the center of said fiber unit when it is in unfolded condition, which unit then extends continuously to;

two spaced apart and unbroken vertical side members of ceramic fiber, each side member having an outer face for contact with an adjacent module, which vertical side members together with said bottom layer form a U-shape, the remaining portions of aid fiber unit from each side member being doubled over inwardly and downwardly, back against each vertical side;

thereby forming

two depending ceramic fiber interior leg members within the aperture of said U-shape, each leg member being doubled back against the adjacent vertical side members and forming a joint between each leg member a top module cold face for positioning adjacent said external support structure, said module cold face having at least two folds provided by said doubled over fiber unit portions, and with there being at least one joint at the cold face.

12. A resilient ceramic fiber insulation module from a unit of fiber of finite length, said fiber unit being at least substantially in folded condition in said module, with the module being adapted for ease of attachment to an external support as well as for side-by-side compression of adjacent modules on attachment, said module comprising:

an unbroken bottom layer of ceramic fiber, the bottom outer surface thereof providing the module hot face, the center of the bottom layer in the folded condition being at least substantially the center of said fiber unit when it is in unfolded condition, which unit then extends continuously to;

two spaced apart and unbroken vertical side member of ceramic fiber, each side member having an outer face for contact with an adjacent module, which vertical side members together with said bottom layer form a U-shape, the remaining portions of said fiber unit from each side member being doubled over inwardly and downwardly, back against each vertical side;

thereby forming

two depending ceramic fiber interior leg members, within the aperture of said U-shape, each leg member being doubled back against the adjacent vertical side members and forming an inner unit joint between each leg member and its adjacent vertical side member;

thereby providing

a top module cold face for positioning adjacent an external support, said module cold face having at least two folds provided by said double over fiber unit portions, and with there being at least one outer unit joint at the module cold face;

an elongated fiber module support rod extending along the upper portion of said inner unit joints which are between adjacent leg and side members; and

fastening elements connecting each said support rod by cross-typing arrangement across an inter-module through joint to a backing member.