SK132393A3 - Shaped piece, method setting of flexible insulating plates between its walls and device for processing of this method - Google Patents

Abstract

In order to achieve effective thermal insulation, a multi-shell formed piece, in particular a pipe (1) for restoring chimneys, having at least two coaxially disposed, spaced-apart walls (2, 3) with a piece of insulating material (4) made of rock wool provided therebetween is, with manufacture and design being simple, configured such that the insulating material (4) consists of at least one bent insulating plate (5) which is preferably made of trock wool and has a largely constant cross section. Further, the invention proposes a device for disposing said insulating plates (5) and a corresponding process. <IMAGE>

Description

Technical field>

The invention relates to a shaped piece consisting of a plurality of shells, in particular a chimney protection tube, with at least two coaxial walls spaced apart from one another, between which a mineral wool insulating material is interposed. The invention further relates to a method for laying flexible insulating boards between the walls of a shaped piece and an apparatus for carrying out the method.

BACKGROUND OF THE INVENTION

Molded pieces consisting of several shells and corresponding to the type described above have long been known in a variety of embodiments. They are mainly shaped pieces for chimneys. Examples are given in DE-OS 19 22 581 and DE OS 31 39 338.

In the molded piece known from DE-OS 19 22 581, the insulation consists of three mineral wool segments which in the circumferential direction are added to a tube loosely inserted between the walls of the molded piece, the inner wall or inner tube being mounted after pre-assembly insulation. Alternatively, it is proposed here to firmly connect the insulation to the outer wall in the form of a prefabricated component. However, the segments used for insulation are expensive to produce and bulky, which again causes high packaging, transport and storage costs. In addition, such segments have thickness deviations of a few millimeters in size and must generally be ground first so that their surfaces have a desired dimension that would allow the segments to be inserted between the walls of the molding. This entails additional production and assembly costs.

The shaped piece known from DE-OS 31 39 338 also serves for the construction of chimneys, the gap between the walls of the shaped piece being filled with mineral wool strands. The strands are first laid loosely on the inner side of the outer casing of the molded piece and then covered from the inside by loose thin sheets of sheet having outwardly bent sections extending through the molded piece. After introduction, the sheet metal forms a method of the shaft, the opening of which is at least slightly larger than the cross-section of the inner wall or inner tube to be inserted. By means of the sheet metal shaft thus formed, the inner tube is introduced and the insulating layer is compressed. Upon introduction of the insulation, the sheet of metal sheet is withdrawn again so that the insulation layer abuts against the walls of the annular gap filled by it.

However, the known moldings described above have disadvantages in many respects. A common problem with such shaped pieces still arises during the pre-production and installation of the insulating material. From the point of view of thermal engineering, the prior art mineral wool pipes or segments are the best known solutions since, because of the possible position of the fibers approximately perpendicular to the insulated heat stream, the thermal resistance of the thermal insulation is highest. In order to obtain these advantages, the above-mentioned disadvantages of high production, transport and storage costs must be taken into account.

It is also an object of the invention to provide a shaped piece consisting of several shells of the type described above and to further improve it in order to obtain good insulating effect at low production costs and simple construction. Further, a method for depositing an insulating material between the walls of the molded pieces consisting of several shells according to the invention is to be provided, and an apparatus for carrying out this method is also to be provided.

SUMMARY OF THE INVENTION

The invention solves the problem by providing a shaped piece consisting of several shells, in particular a chimney protection tube, with at least two coaxial walls arranged spaced apart from one another, between which a mineral wool insulating substance is arranged, in which the insulating substance it consists of at least one bent, preferably stone wool-made insulating board with at least a substantially constant cross-section.

In the method according to the invention, it has been found that it is possible to combine the spatial advantages of insulating boards relative to transport, with the advantages of thermally-friendly insulating segments or insulating tubes by bending and initially flat insulating boards produced as insulation between the walls of the molded piece tube shape. However, the properties of the insulating boards must be designed such that the insulating board does not break when bent, which can be achieved, for example, by a suitable choice of density after the raw and unilateral application of the web. Due to the bent insulating board, the course of the fibers is approximately parallel to the insulated wall surfaces and thus perpendicular to the heat flow. As a result of this, and also because of the at least substantially constant cross-section of the insulating boards, an optimum thermal resistance is achieved in the installation state.

Such shaped pieces are particularly suitable for the additional protection of chimneys that is increasingly required on the market as energy-saving and low-temperature heating boilers are increasingly being used. In such boilers, for example for underfloor heating, the temperature of the flue gas is below the dew point so that water can precipitate on the inner walls of a poorly insulated chimney, so that they can get wet and, moreover, no satisfactory flue gas evacuation.

In view of the particularly effective thermal insulation, it is further advantageous if the insulating material is formed at least in one piece in the circumferential direction, i.e. it consists of one insulating board in the circumferential direction. The insulating plate must then be so dimensioned that the edges of the insulating plate extending axially with respect to the molded piece abut one another and thus form an insulating tube. Advantageously, the adjoining edges may be so skewed that the insulating substance overlaps at least slightly over the adjoining edges in order not to form a cold bridge even at slight dimensional deviations. In this case, the insulating board may have a trapezoidal cross section in the longitudinal direction. The dimensional variations at the edges are therefore harmless, since the degree of overlap of the wedge edges is sufficient. It would also be possible to design the insulating plate as a tubular shell with a longitudinal slot extending preferably tangentially to the inner wall of the tubular shell in order to advantageously resolve the problem of offset deviations even in the tubular shells.

The thickness of the insulating material or insulating board could now be measured so that there is a slight play between the walls of the shaped piece and the insulating material. In view of the particularly high insulation efficiency, however, it is preferred that the insulating material between the walls of the molded piece is precisely shaped, preferably under the effect of force, i.e., in a slightly compressed state. By arranging the insulating material between the walls of the molded part under the effect of force, it is further ensured that the insulating material cannot be slipped, moreover being clamped between the walls.

In order for the walls of the molded part to have the correct distance from each other, in particular coaxial, when the insulating material is inserted, they could be held at a constant distance from one another by bridges or inserts arranged between them at one end. Likewise, the walls can assume a coaxial position only when the insulating material is inserted, so that they are held at a constant distance from each other by the insulating material itself.

however, the possibility requires increased production costs,

The latter, since the walls or pipes must be held in coaxial configuration during assembly.

The invention further provides a device for placing flexible insulating boards between coaxially spaced apart walls of shaped pieces consisting of a plurality of shells, in particular chimney protection tubes, which comprises one or both of an internal tool which can be inserted from outside or inside to the free end of the inner wall. and one of the male and female tools which can be pushed from outside or inside to the free end of the outer wall, the inner tool and the outer tool being arranged coaxially at least to a large extent in the inserted state. In other words, the inner tool and the outer tool of the device according to the invention, when inserted, form a kind of wall extension between the walls of the insulated molded piece. This extension serves both for bending and for introducing an insulating plate which is housed in the space to be created.

With regard to the design of the inner tool, when the inner tool is pushed from the inside to the free end of the inner wall, it is particularly advantageous if the inner tool has a circumferentially extending outer reinforcement, collar or the like, which has two functions. This outer reinforcement serves both as a stop for limiting the insertion movement of the inner tool and serves as a transition to the inner wall of the shaped piece, effectively preventing the insulation board from being caught on a more or less sharp edge. The outer reinforcement, collar or the like is preferably measured such that it protrudes about the thickness of the inner wall of the shaped piece radially from the inner tool and has a continuous contour. Again, the insulation board is effectively prevented from catching.

Further, the inner tool preferably projects in the direction away from the shaped piece from the area of the outer tool. Further, the inner tool, with its region protruding from the molded piece, in particular from the region of the laterly explained outer tool, serves as a molding aid and thus for accommodating the insulating board.

In order for the insulating plate to be easily inserted into the space between the walls of the shaped piece, the inner tool has a smooth outer surface serving as a sliding surface. The same applies to the inner surface of the external tool.

In a particularly preferred embodiment, the outer tool is in the form of a funnel, so that the insulating plate is forcedly inserted into the area between the walls of the shaped piece. In one embodiment of the outer tool with respect to the free end, the outer region of the outer tool, which by its wall forms a kind of insertion restriction or a stop. Thereafter, no special elements serving as the stop are necessary. In the case of an external tool which is fitted from the outside to the free end of the outer wall, an inwardly directed thrust is required, which on the one hand forms a stop for the sliding movement and, on the other hand, forms a passage over the free end of the outer wall.

the fact that it slides on the wall is very advantageous when it extends to the free end,

The end of the outer tool facing away from the funnel-shaped region further protrudes advantageously from the inside on the outer wall approximately adjacent the space between the outer wall and the inner wall of the shaped piece, so that the outer tool region serves as a sliding aid for the insulating material. Similarly, the inner wall of this region is smoothly formed.

The invention further provides a method for laying flexible insulating panels between the walls of a molded piece, in particular between the walls of two shell tubes, preferably chimney protection tubes, using the apparatus defined above, comprising the steps of:

insertion or insertion of an external tool serving as a guide, insertion or insertion of an internal tool serving as a clamp and for bending the insulation boards, the external and internal tools being adapted to be mounted in reverse order together for double-sided guidance and possibly sealing the insulation boards, bending inserting the insulating plate bent on the inner tool into the area between the walls and possibly compressing the insulating plates upon insertion, and removing the inner tool and the outer tool.

Advantageously, on the device according to the invention it is possible to bend and insert as many insulating boards into the space between the walls until the space between the walls is filled over the entire length of the shaped piece. In this case, the insulating boards can be compressed in the longitudinal direction of the shaped piece during suction.

There are various possibilities of advantageously the idea of the present invention, the claims following the claims 1, to carry out for this purpose 9 and 13 both the patented and described examples of the preferred embodiment of the invention serve and how to further develop.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is illustrated in the drawings, wherein:

Fig. 1 shows an axial section of an embodiment of a shaped piece according to the invention in the form of a tube consisting of two shells; FIG. 2 shows the shaped piece of FIG. 1 in section along line II-II, FIG. 3 schematically shows the object of FIG. 2 in an unfolded state, and FIG. 4 shows an axial section of a device according to the invention for placing flexible insulating panels between coaxially spaced apart walls of the moldings consisting of a plurality of moldings of FIG. First

shells, in particular

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows a shaped piece according to the invention consisting of two shells, in particular a tube 1

O r »consisting of two shells. This pipe 1 has two coaxially spaced walls 2,3a and an insulating material 4 arranged between the walls 2, 3 '.

According to the invention, the insulating material 6 consists of bent insulating boards 5 of constant cross-section. In the selected embodiment, the insulating boards 5 are made of stone wool.

In FIG. 2 it is schematically indicated that the stone wool fibers 6 have a preferred direction, namely that they are uniformly oriented. The fibers 6 here run approximately parallel to the surface of the insulating board 5, so that they also run approximately parallel to the surfaces of the walls 2, 3 and thus across the heat flow 7 shown in FIG. 2 arrows.

In the embodiment of FIG. 1 and 2, the insulating material 4 is formed in one piece in the circumferential direction, i.e. it consists of a single insulating board 5 in the circumferential direction. 2 it is indicated that the axially extending edges 8 of the insulating board 5 abut one another, the edges 8 being bevelled at an acute angle, thereby ensuring that the insulating substance 4 is still at least at least in the region of the adjacent edges 8 slightly overlaps. Fig. 2 is also intended to show a cross-section of a tubular shell having a longitudinal slot extending approximately tangentially to its inner wall.

Fig. 3 shows particularly clearly that the insulating plate 5 in the deployed state has a rhombic cross-section.

In FIG. 1 it is further shown that the walls 2, 2 are held at a fixed distance from each other by firmly connected bridges 9. With the insulating material 4 or insulating plates 5 in place, the walls 2, 2 are additionally held in position by the insulating material 4, The wall 2, 2, which has no bridges 9, is positionally secured.

With regard to the molded piece or pipe 1 according to the invention, it should be noted that the pipe walls 2, 2, namely the inner pipe and the outer pipe, are made of stainless steel.

Fig. 4 shows an embodiment of an apparatus for placing the flexible insulating boards 2 between the coaxial, spaced apart walls 2, 2 of a shaped piece consisting of two shells, in particular of the aforementioned tube 1 consisting of two shells.

The embodiment of the device according to the invention shown in FIG. 4 comprises an inner tool 10 adapted to be fitted to the free end of the inner wall 2 and an outer tool 12 adapted to be fitted to the free end of the outer wall 2. The inner tool 10 and the outer tool 11 are in alignment with each other and form a certain extension of the tube 1 to be filled with insulation boards 5.

Fig. 4 further shows that the inner tool 10 has a circumferentially outer reinforcement 12 which serves both as a stop and as a transition to the inner wall 2.

The outer reinforcement 12 protrudes about the thickness of the inner wall 2 from the inner tool 10, forming a transition from the inner tool 10 to the inner wall 2.

Fig. 4 further shows that the inner tool 10 protrudes from the area of the outer tool 11 in the direction away from the molded piece or tube 1. Thus, the inner tool 10, with its region protruding from the tube 1, forms a tab serving as a molding aid for the insulating boards 5. 10 shows a smooth outer surface 13 serving as a sliding surface.

Fig. 4 further shows that the outer tool 11 is in the form of a funnel. The area 14 of the external tool 11, which extends to the free end, forms a wall for its insertion or a stop for the external tool 11 by its wall. Of course, the outer surface 15 of the widening area 14 of the outer tool 11 is smooth, so also the inner surface 15 it forms a sliding surface for the insulating board 5.

Using FIG. 4, it is also possible to show the method according to the invention of placing flexible insulating boards 5 between the walls 2, 3 of tubes 1 consisting of two shells using the apparatus of the invention described above. First, the inner tool 10 and the outer tool 11 are mounted on the pipe 1 or inserted between the walls 2, 3 of the pipe 1. The inner tool 10 serves as a shim and the bending of the insulating boards 5, the outer tool 11 serves as a guide.

The order of operations for mounting the inner tool 10 and the outer tool 11 is not significant. The inner tool 10 and the outer tool 11 serve together for guiding on both sides and possibly sealing the supplied insulation boards 5.

The insulating plate 5 is bent around the inner tool 10. Then, the insertion of the bent insulating plate 5 begins in the area between the walls 2, 2. Optionally, the insulating plate 5 is compressed when retracted. After the final placement or insertion of the insulating plate 5, the inner tool 10 and the outer tool 11 are removed again.

In FIG. 1 and 4 it is indicated that as many insulating plates 5 are bent and gradually inserted into the area between the walls 2 and 2 until the space between the walls 2 and 3 is filled over the entire length of the shaped piece. The insulating plates 5 are then compressed in the longitudinal direction of the shaped piece when inserted into the area between the walls 2, 3, thereby further improving the thermal insulation.

The above-described exemplary embodiment of the invention serves only to better understand the nature of the invention, but does not limit it to this exemplary embodiment.

Claims (14)

PATENT CLAIMS 1. A shaped piece consisting of several shells, in particular a chimney protection tube, with at least two coaxial walls spaced apart from one another, between which a mineral wool insulating material is disposed, characterized in that the insulating material (4) consists of at least one a bent, preferably stone wool-produced insulating board (5) having at least a substantially constant cross-section. Molding according to Claim 1, characterized in that the fibers (6) extend approximately parallel to the surface of the insulating panel (5), so that they also extend substantially parallel to the surfaces of the walls (2, 3) and thereby transversely to the flow (7). ) heat. Molding according to claim 1 or 2, characterized in that the insulating material (4) is made in one piece at least in the circumferential direction, that is to say in the circumferential direction it consists of a single insulating plate (5) and an axially extending edge ( 8) the insulating boards (5) abut one another. Molding according to Claim 3, characterized in that the edges (8) are bevelled at an acute angle so that the insulating material (4) overlaps in the region of the abutting edges (8). Molding according to Claim 4, characterized in that the insulating plate (5) has a rhomboidal cross section in the longitudinal direction. Molding according to any one of Claims 3 to 5, characterized in that the insulating plate (5) is designed as a tubular shell with a longitudinal slot extending preferably tangentially to the inner wall of the tubular shell. Molding according to any one of Claims 1 to 6, characterized in that the insulating material (4) is arranged between the walls (2, 3) under the effect of a force, i.e. in at least a slightly compressed state. - 12 Molding according to any one of Claims 1 to 7, characterized in that the walls (2, 3) are held at a constant distance from one another by their connecting bridges (9) or inserts preferably located between them at one end. Device for placing flexible insulating boards between coaxially spaced apart walls of shaped pieces consisting of several shells, mainly chimney protection pipes, characterized in that it comprises one of the outside or inside the free end of the inner wall (2) a push-in inner tool (10) and one of the male tool (11) and the male tool (10) and the female tool (11) are displaceable at least to a large extent coaxially at least to the free end of the outer wall (3). 10. The device according to claim 9, wherein the inner tool is slidable from the inside to the free end of the inner wall, characterized in that the inner tool (10) has a circumferentially extending outer reinforcement (12), collar or the like. as a transition to the inner wall (2). Device according to claim 9 or 10, characterized in that the inner tool (10) protrudes from the area of the outer tool (11) in the direction away from the shaped piece, the inner tool (10) forming a tab serving as a shaped piece a device for insulating boards (5) and has a smooth outer surface (13) serving as a sliding surface. Device according to any one of claims 9 to 11, characterized in that the outer tool (11) is in the form of a funnel and is adapted to fit from the inside to the free end of the outer wall (3), and the region (14) of the outer tool ( 11) extending to the free end constitutes the insertion restriction or the stop. - 13 TV 13. A method for laying flexible insulating boards between the walls of a molded piece, in particular between the walls of two shell tubes, preferably chimney protection tubes, using the apparatus of items 9 to 12, characterized in that it comprises the steps of: insertion or insertion of an external tool serving as a guide, insertion or insertion of an internal tool serving as a clamp and for bending the insulating boards, the external and internal tools being also adapted to be mounted in reverse order together for double-sided guidance and possibly sealing the insulating board bending, inserting the insulating plate bent on the inner tool into the area between the walls and possibly compressing the insulating plates upon insertion, and removing the inner tool and the outer tool. 14. A method according to claim 13, characterized in that as many insulating boards are inserted into the region between the walls until the region between the walls is filled over the entire length of the molding and the insulating boards are optionally compressed in the longitudinal direction of the molding.