Insulating concrete shell

Abstract

An insulating concrete shell made of refractory cast concrete or refractory tamped concrete for insulating uprights or supporting tubes in a walking beam furnace or pusher-type furnace. The insulating concrete shell is shell-shaped and has a sheet metal strip on the inner side at each end, with which the insulating concrete shell can be fastened to an upright or to a supporting tube. The two sheet metal strips are connected to each other by wires, whereby the two wires are completely embedded in the cast or tamped concrete. A method for manufacturing an insulating concrete shell is also disclosed.

Claims

1. An insulating concrete shell (5a) made of refractory cast concrete or refractory tamped concrete (4a) for insulating uprights or supporting tubes in a walking beam furnace or pusher-type furnace, the shell (5a) being shell-shaped, comprising: a first metal strip (1a) bent into a substantially semicircular shape and arranged on an inner side (10a) at a first end of the insulating concrete shell (5a); a second metal strip (1a) bent into a substantially semicircular shape and arranged on the inner side (10a) at an opposite second end of the insulating concrete shell (5a), the first and second metal strips (1a) being configured for fastening the insulating concrete shell (5a) to the upright or the supporting tube; a recess (8a) in an area between the first and second metal strips (1a); and a fibre mat (3a) inserted into the recess (8a), wherein the first and second metal strips (1a) are connected to one another by wires (6a) with two wires (6a) completely embedded within the cast or tamped concrete (4a).

2. The insulating concrete shell (5a) according to claim 1, wherein the wires (6a) are welded at their respective ends (11a) to the respective sheet metal strips (1a).

3. The insulating concrete shell (5a) according to claim 2, wherein the first and second metal strips (6a) are connected to each other by a total of two wires (6a).

4. The insulating concrete shell (5a) according to claim 2, wherein the wires (6a) are bent into a substantially U-shape.

5. The insulating concrete shell (5a) according to claim 2, comprising cross wires (7a) along the wires (6a) such that the two metal strips (1a) are connected to each other via grid-shaped wire anchors (2a).

6. The insulating concrete shell (5a) according to claim 5, wherein the cross wires (7a) are completely embedded in the cast or refractory tamped concrete (4a).

7. The insulating concrete shell (5a) according to claim 1, wherein the first and second metal strips (6a) are connected to each other by a total of two wires (6a).

8. The insulating concrete shell (5a) according to claim 7, wherein the wires (6a) are bent into a substantially U-shape.

9. The insulating concrete shell (5a) according to claim 8, comprising cross wires (7a) along the wires (6a) such that the two metal strips (1a) are connected to each other via grid-shaped wire anchors (2a).

10. The insulating concrete shell (5a) according to claim 9, wherein the cross wires (7a) are completely embedded in the cast or refractory tamped concrete (4a).

11. The insulating concrete shell (5a) according to claim 7, comprising cross wires (7a) along the wires (6a) such that the two metal strips (1a) are connected to each other via grid-shaped wire anchors (2a).

12. The insulating concrete shell (5a) according to claim 11, wherein the cross wires (7a) are completely embedded in the cast or refractory tamped concrete (4a).

13. The insulating concrete shell (5a) according to claim 1, wherein the wires (6a) are bent into a substantially U-shape.

14. The insulating concrete shell (5a) according to claim 1, comprising cross wires (7a) along the wires (6a) such that the two metal strips (1a) are connected to each other via grid-shaped wire anchors (2a).

15. The insulating concrete shell (5a) according to claim 14, wherein the cross wires (7a) are completely embedded in the cast or refractory tamped concrete (4a).

16. A method of producing a shell-shaped insulating concrete shell (5a), comprising: bending two sheet metal strips (1a) into respective semicircular shapes to the shape of an upright or a supporting tube; connecting the two bent sheet metal strips (1a) to one another via at least two wires (6a) to form interconnected metal strips; placing the interconnected sheet metal strips into a casting or tamping mould configured to allow formation of a substantially shell-shaped component with a recess (8a) on an inner side (10a) between the two sheet metal strips (1a); filling the casting or tamping mould (4a) with refractory concrete; allowing the refractory concrete to cure to form a manufactured component; removing the manufactured component from the mould; inserting a ceramic fibre mat (3a) into the recess (8a) at the inner side (10a).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The following describes the state-of-the-art standard and an exemplary embodiment of the invention on the basis of drawings. In these drawings:

(2) FIG. 1 shows a schematic cross-section through an insulating concrete shell according to the state-of-the-art;

(3) FIG. 2 shows a longitudinal section through the insulating concrete shell of FIG. 1;

(4) FIG. 3 shows a schematic cross-section through an exemplary embodiment of the insulating concrete shell;

(5) FIG. 4 shows a longitudinal section through the insulating concrete shell of FIG. 3; and

(6) FIG. 5 shows perspective view of the insulating concrete shell according to the invention.

DETAILED DESCRIPTION

(7) The same reference numerals in the individual Figures refer to the same components in each case.

(8) The insulating concrete shell 5 shown in FIGS. 1 and 2 illustrates an embodiment according to the state-of-the-art as already explained in the introduction above.

(9) An insulating concrete shell 5a according to the disclosure is shown in the cross-section in FIG. 3. FIG. 4 shows a side section view of the insulating concrete shell 5 according to FIG. 1.

(10) On the inner side 10a are shown the two sheet metal strips 1a bent into a semicircle. Two wires 6a are welded to the sheet metal strip 1a. The two wires 6a are bent in a U-shape and welded to the wire ends 11a of the sheet metal strips 6a. Cross wires 7a are fixed along the wires 6a, and in the present exemplary embodiment extend substantially in the circumferential direction of the insulating concrete shell 5a. The wires 6a and the cross wires 7a form grid-like wire anchors 2a. The wires 6a and the cross wires 7a are embedded in cast or tamped concrete 4a. On the inner side 10a in the area between the sheet metal strips 6a, a recess 8a is provided in the cast or tamped concrete 4a. A ceramic fibre mat 3a is inserted into this recess 8a. The U-shape of the wires 6a is clearly visible in FIG. 5.

REFERENCE NUMERALS

(11) 1 Sheet metal 2 Anchors (slotted pins) 3 Fibre mat 4 Poured/tamped concrete 5 Insulating concrete shell 1a Sheet metal strip 2a Wire anchor 3a Fibre mat 4a Poured/tamped concrete 5a Insulating concrete shell 6a Wires 7a Cross wires 8A Recess 10a Inner side 11a Wire end