FI85761B - Connection piece - Google Patents

Description

1 85761

Adaptation

In fireplaces such as prefabricated fireplaces, fireplaces and stoves, the connecting flue is often installed directly on top of the appliance, either as a bend in the adjacent brick flue or as a direct connecting flue upwards, so that the connecting flue is connected to a factory-fitted flue. A common disadvantage is that in different fireplaces, the diameters of the flue differ considerably, in which case the trade must have a wide range of connecting flue bends and straight connecting flues. In addition, this often results in the connecting flue having to be ordered separately from the manufacturer, which creates unnecessary waiting, misunderstandings and unnecessary costs.

The object of the present invention is to eliminate the above-mentioned aspects, and the main features of the invention are set out in the claims.

The invention will be explained in more detail below with reference to the accompanying drawing, in which Fig. 1 shows a vertical section of a fireplace top mounted with a fitting 20 according to the invention with connecting flues 3 shows a fitting formed by a one-way conical cylinder inserted inside the connecting flue,:. Fig. 4 shows a fitting formed by a bidirectional conical cylinder inserted inside the connecting flue,. Fig. 5 shows a smoke opening on top of the fireplace, in which a connecting flue is arranged in the usual way for a connecting flue of suitable length, Figures 6, 7 and 8 show three different positions of the fitting inside the connecting pipe.

Figure 1 shows a subassembly consisting of. : 35 2 85761 A standard diameter sheet steel connecting flue 2 connected to the lower end 1 of a prefabricated flue 1, further connected at its lower end 3 to a smaller diameter flue flange flange (or connecting flue) 5 5 by means of a connecting piece 6a between the flange flange (or connecting flue) 5. Correspondingly, Fig. 2 shows an embodiment in which the straight connecting flue is replaced by a bending connecting flue 7 ,. A fitting 8 has been used as an aid in the installation, because the standard-length connecting flue 7 would otherwise be too loose.

Figure 3 shows in more detail a sleeve-shaped conical cylinder-shaped fitting 6, for example made of sheet steel by pressure turning, formed by a conical part 9 and cylindrical parts 10 and 11. The conical angle α is preferably made so small that the conical part 9 grips when pressed lightly on top of the flange (or connector flue) 5. The grip improves the tightness of the 20 or more flue (or connector flue) 5 connecting flues 2 or 7 in place.

The fitting piece 8 shown in Fig. 4 is made as a double cone, in which the conical part 12 is intended for larger diameters of the flange (or connecting pipe) 5 of the flue 25 than the conical part 13. This provides a fitting piece with a sufficiently large fitting area, even if only 6 °. Since both ends of the double cone are the same size due to the extension formed by the flange 17, the guiding effect of this alternative shape on the connecting flue 2 or 7 is better than the simpler solution shown in Fig. 3. In Fig. 1, the fitting piece 6a is provided with a flange 17a for the same reason.

35 Figure 5 shows the smoke opening on top of the fireplace, in which • a connecting flue 5 is placed in the usual way. as such, a standard-sized connecting flue made of sheet steel, shown by a dotted line 2. When the connecting flue

Claims (4)

3 85761 the constant inside diameter is too large for the connecting flue 5, the adapter according to the invention shown in the other figures is used as an aid for providing a stable connection in a limited diameter range. In Figure 6, the adapter 8 is placed with the larger cone 12 facing downwards, because the connecting flue 5 would not have fit inside the smaller cone 13. In Fig. 7 the Fitting 8 is placed in a smaller cone 13 10 facing downwards, because the connecting flue 5 would not have reached the sealing contact inside the cone 12. Fig. 8 shows a boundary case in which the smallest possible diameter of the connecting flue passes through the cylindrical part 14 in the central region of the fitting 8, giving control from that region to the connecting flue 2 drawn as a dotted line and at the same time forming a conventional tightness in the joint. The invention is not limited to the application examples presented above, but can be varied considerably in detail within the scope of the claims. A fitting, i.e. an adapter, for connecting the smoke openings of fireplaces of different sizes to a connecting duct of constant diameter *, characterized in that the fitting (6, 6a, 8) is formed in one direction (Fig. 3) or:. bidirectional (Fig. 4) conical cylinder (9, 12, 13). 30 Adapter according to Claim 1, characterized in that the conical angle (α) of the conical cylinder (6, 6a) or conical cylinders (12, 13) is smaller than the friction angle between the metals to be joined, the cone adhering to the flange sleeve (5) or to the connecting pipe (5): forming a single unit. m \ mm · 3. Adapter according to Claim 1, characterized in that one end of the bidirectional cylindrical cone body (8) has a smaller diameter range than the other end. Fitting according to Claim 1, characterized in that the smaller end (10, 13) of the cylinder cone body is provided with a flange (17, 17a) having an outer diameter equal to the outer diameter of the larger end of the cylinder cone (6, 6a, 12). 10