LU84219A1 - THERMAL INSULATING SHEATHING FOR LONG STRETCHED CONSTRUCTION PARTS - Google Patents

Description

♦ · s - ♦ '% ♦' - 'I ", I *' t I». I a * '»1 J" *. * *. *

Ann. J PROMAT Society for Modern Materials mbH Grunerstr. 33 »4000 Dusseldorf 14

Title: Värdämmende jacketing for elongated

Construction parts «" __, Έ - ΠΊΓ —i i "l" rwr1 '- t "" 1 "

The invention relates to a thermally insulating sheathing for elongated structural parts, in particular for the fire-resistant insulation of load-bearing pipes through which water flows in an industrial furnace.

In industrial furnace and plant construction, it is necessary to provide the generally water-cooled support, support, support and sliding tubes with a v / heat-insulating jacket in order to reduce the heating of the cooling water and. to reduce the thermal shock for these structural components of such furnaces when they are heated.

It is known to surround such structural parts with molded parts or a refractory mass applied in the moist state, or to wrap them with mats made of ceramic fibers. The application of moist masses to the pipes requires special distances and is cumbersome and expensive.

To attach molded parts, complicated supporting devices, such as holding brackets or the like, are required, which have to be welded to the pipes or other structural parts and have a complicated shape, in order to be able to securely hold the molded parts grouped around the structural parts. Mineral fiber mats, in particular mats made of ceramic fibers, which only stick together by felting their fibers, which are oriented essentially in one direction, * * s ÿ

Po 22A · * + 2 »*« »have the disadvantage that the fiber composite is lost if they are wrapped around pipes and other structural parts to a narrow radius when wrapped around them. In addition, the fibers in the furnace are loosened and blown away by the gas flow in the furnace, so that the insulation quickly becomes thinner during operation. Furthermore, the fibers running parallel to the structural part to be protected sinter along their entire length, as a result of which the insulating effect is further reduced.

The object of the invention is to avoid these disadvantages and to provide a very simple and highly effective heat-insulating jacket for elongated structural parts, in particular for supporting tubes of industrial furnaces, which are manufactured very simply and meet all cross-sections and all the requirements of the structural parts to be encased can be adjusted and has a very low weight.

This object is achieved with the invention by several, incombustible fiber mats or the like. Rings cut out transversely to the fiber direction are loosened, which are attached to one another in such a way on the structural member to be insulated that their fibers, which are oriented essentially in one direction, run perpendicular to the longitudinal axis of the elongate structural member and that the fiber directions of adjacent rings are at an angle to one another are offset.

This configuration has the advantage that the fibers of the rings forming the sheathing are arranged at least partially transversely to the tube wall, the part of a ring in which the fibers are oriented perpendicular to the insulating construction part or to a Rehr to be sheathed, the part of the next Ringes holds, in which the fibers run tangentially to the tube. In this way, on the one hand, a composite effect is achieved in the entire sheathing and, on the other hand, the disadvantage that all fibers run parallel to the tube wall and can thereby easily peel off is avoided.

Po 224 - 3 - * t

It is particularly expedient if the fiber directions of adjacent rings are offset from one another by 90 °. The fiber direction then changes from one ring to the other in such a way that the fibers of adjacent rings are perpendicular to one another relative to the longitudinal axis of the structural part.

In order to achieve a very high strength and a particularly good bonding effect, it is advisable to glue adjacent rings with their adjoining ring surfaces «For this purpose, a still temperature-resistant and waterproof inorganic adhesive is used.

So that the rings can be easily applied from the side to the elongated construction site, they are expediently cut open by a radial cut or consist of several ring parts, in particular of two ring halves, which are then glued together again on their cut surfaces. It is advantageous here if the rings are cut open transversely to the fiber direction.

The rings can be adapted to any cross-sectional dimension of the structural part to be encased and not only be circular rings, but they can also have the shape of rectangular rings, hexagonal rings, oval rings or the like. to have.

The inner circumferential surfaces of the rings can be glued directly onto the structural element to be insulated, for example onto the outer circumference of a standing pipe in an industrial furnace. It is particularly useful, however, if they or the like with their inner peripheral surface on a metal mesh, an expanded metal grid. are glued, which is placed around the construction part. As a result, the sheathing can easily be replaced, replaced or repaired without the structural part to be insulated being affected thereby. The metal mesh itself can be welded to the pipe to be insulated.

Po 224 - 4 -

t V

or attached in some other way · In general, however, it is sufficient to wrap the metal mesh loosely or under tension around the structural part to be insulated ·

The rings can be punched out of various mineral fiber flats * · sheets or nonwovens. They are preferably cut or punched out of high-temperature-resistant ceramic fiber fleece, the thickness of which should not exceed 10 cm.I, when using a metal mesh3 as a carrier for the insulation fiber rings, the metal mesh carries on its outer circumference a bed of high-temperature-resistant, inorganic adhesive, on which the rings are attached are glued to their inner peripheral surfaces. This ensures that mineral fibers are well anchored to the metal mesh.

Further features and advantages result from the following description and the drawings, in which particularly expedient embodiments of the invention are explained in more detail using examples. It shows:

1 is a perspective partial view of a heat-insulating jacket according to the invention, which is attached to an upright tube of an industrial furnace, with individual parts broken away,

2 two adjacent rings of the casing according to FIG. 1 in a top view and

Fig. 3 shows two adjacent rings of another embodiment of the casing according to the invention in a plan view.

- * »* 'Po 224 - 5 -» * *

In the drawings, 10 denotes an upright tube of an industrial furnace, through which Kiihl-vasser flows 9. A metal mesh 11 is wound around the upright tube 10, the superimposed edges 11a and 11b of which are connected to one another in such a way that the metal mesh 11 lies firmly against the tube 10.

The metal mesh 11 is coated on the outside with an adhesive bed 12. The adhesive is a high temperature resistant, water-resistant, inorganic adhesive, for example based on water glass. A multiplicity of rings 13 are glued onto this adhesive bed 12, which tightly enclose the metal fabric 11 and the upright tube and which lie closely on one another with their facing ring surfaces 14. The rings 13 are made of a mat or a fleece Ceramic fibers cut out or punched out, which run essentially in one direction 15 in the nonwoven. In the exemplary embodiment shown in FIGS. 1 and 2, the rings 13 are circular rings which are cut open by a radial cut 16 running transversely to the fiber direction 15. They can be opened by spreading and mutually displacing the cut surfaces and thereby from the side onto the post -Tube 10 or, on which this surrounding metal mesh 11 are pushed.

It can be seen from FIG. 1 that the rings 13 are arranged on the standing tube in such a way that the fiber directions 15 of adjacent rings 13 (each offset by 90 ° from one another so that the fiber direction 15 changes from one ring to the other).

The rings 13 are not only glued to one another on their end faces 14, but also on the cut surfaces of their radial cuts 16, so that they form an Blockth block on the tube.

* - f *

Po 224 - 6 - s * #

In Fig. 3 rings for another casing according to the invention are shown. The rings 17, which serve to sheath a construction part which is rectangular in cross section, not shown here, each consist of two ring halves 17a and 17b of a rectangular ring 3, which are glued together at their cut surfaces 18 and 19 after being pushed onto the construction part to be insulated. It can be seen from FIG. 3 that the cut surfaces 18 and 19 run transversely to the fiber direction 15. Here, too, successive rings 17 are glued together with their ring surfaces 14 in such a way that the fiber directions 15 of adjacent rings are perpendicular to one another.

It can be seen that the fibers of part A of each ring are perpendicular to the tube wall and that the fibers oriented essentially in the direction 15 run perpendicular to the longitudinal axis 20 of the structural part to be encased, here the upright tube 10. The fibers of each ring are therefore largely in area A perpendicular to the adhesive bed 12. are thus well anchored in the adhesive bed. Since the fibers are not bent into a ring, but are clamped between the fibers of adjacent rings running perpendicular to them and glued to them, they cannot detach from the bond. Sintering occurs on the whole only on fiber cut surfaces, so that the sheath shrinks only insignificantly when exposed to heat.

The invention is not limited to the exemplary embodiments, but several changes and additions are possible without going beyond the scope of the invention. For example, the individual rings can also be arranged so that the fibers of adjacent rings run at an acute angle to one another. It is also possible to design the outer circumference of the rings differently than their inner circumference and to assemble the rings from more than two ring parts. The Y / andthickness of the rings can meet the respective requirements-> (ß- * ί

Po 224 - 7 -. 1 * as well as their outline shape, which can also be cut to fit I-profiles, for example. «Not only ceramic fiber mats, but also other mineral fiber mats, plates or non-wovens can be used as the starting material, and it is also possible to use the thermal insulation Casing according to the invention for the thermal insulation of heating pipes or the like. to use.

It can also be seen that the casing according to the invention is not bound to a specific position of the structural parts to be encased in space, but can also be used to encase horizontal or inclined structural parts. Furthermore, metal mesh or expanded metal can also be used as a carrier instead of a metal rifle.

Claims (6)

1. Thermal insulation jacket for elongated structural parts, in particular for the fire-proof insulation of load-bearing, water-flowed pipes in industrial furnaces, characterized by several, made of incombustible fiber mats or the like. Rings (13 or 17) cut out transversely to the direction of the fibers, which are placed close to one another in such a way on the construction part (10) to be insulated that their fibers, which are oriented essentially in one direction (15), are perpendicular to the * ··. The longitudinal axis (20) of the elongated structural part (10) runs and that the fiber directions (15) of adjacent rings (13 and «17) are offset at an angle to each other · 2 · sheathing according to claim 1, characterized in that the fiber directions (15) of adjacent rings (13 or # 17) are offset from one another by 90 °, 3 · casing according to claim 1 or 2, characterized in that adjacent rings (13 or 17) are glued together with their abutting ring surfaces (14). f Po 224 - II - i ♦ »» * 4 * sheathing according to one of claims 1 to 3, characterized in that the rings (13) are cut open by a radial cut (16) * 5p sheathing according to one of claims 1 to 4, characterized in that the rings (17) consist of several ring parts, in particular of two ring halves (17a and 17b), * '»9 6 * casing according to one of Claims 1 to 5», characterized in that the rings (13 or * 17 ) are cut across the grain (15). 7 * sheathing according to one of claims 1 to 6, characterized in that the rings (13 and 17) are glued together on their cut surfaces (16, 18, 19). 8. Sheath according to one of claims 1 to 7 », characterized in that the rings (13, 17) or the like with their inner circumferential surface on a metal mesh (11). are glued on since it is laid around the construction part (20). 9. Sheathing according to one of claims 1 to 8, characterized in that the rings (13, 17) are punched out of high-temperature-resistant ceramic fiber fleece. 10. Sheath according to one of claims 1 to 9, characterized in that the Metallrewbe (11) carries on its outer circumference an adhesive bed (12) made of a high-temperature resistant, inorganic adhesive on which the rings (13, 17) are glued with their inner peripheral surfaces are.