NL7906801A - CONNECTION VERSION FOR FLAT-SHAPED HOUSING COMPONENTS. - Google Patents

Abstract

In the front panel (5) and rear panel of the heating boiler casing, there are arranged through-openings (6), the edges of which are welded to cylindrical inserts (2) which pass all the way through. The through-opening (6) is provided with a neck-like opening cone (1) and the outside diameter of the insert in the connection region is equal to the smallest inside diameter (4) of the opening cone (1). This means that account is taken of unavoidable deviations in shape and there is no need for preliminary fastening, so that mechanical/automatic welding can be carried out as soon as the parts have been fitted together. <IMAGE>

Description

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\ 49 288 / Jo / AS -1 -, s i - ““ - 'i

Hans Viessmann, j te; ! Battenberg / Eder, Federal Republic of Germany.

i Connection version for flat housing components.

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The invention relates to a connecting embodiment for flat-shaped housing parts, in particular; piercing holes bent upwards at the edges! provided front and rear walls of a boiler, 5? which are welded together with cylindrical built-in parts, such as combustion chamber sleeves, container connecting stubs or the like, which interlock with them.

Boilers, in which the gas and flame are fed; part in the form of, for example, a tubular tube-10-j passage, which, as a rule, also includes the heating gas passages! , the end of which extends through the front and rear wall of the water-bearing housing and is welded to the penetrating areas with the opening edges of the front and rear wall, for example according to 15 'the German "Offenlegungsschrift" 25 52 388 known. !

An efficient and thus cost-saving manufacture of such boilers is only recently guaranteed when such welding together is machined; can run automatically.

However, such a machine-automatic welding connection has heretofore been complicated and the quality of the welding seams may have been reduced, because it is practically impossible to fit the sleeve-shaped inserts in their shape so precisely to the inner diameters of the piercing openings. which have been pre-cut in the connection surfaces, respectively, to be kept so precisely in the shape that a uniform, very small gap which can be bridged with a machine welding seam is created. The door- '

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The opening openings therefore had to be kept a certain size larger in order to be able to insert the construction parts that differ in the shape. Thus, even with the greatest care, larger slit widths occur, at least in certain places, and such slits inevitably require one in advance! weld by hand and even after pre-bonding make welding very considerable. j

After such a connection in advance, the boiler is also manufactured in accordance with the German "Offenlegungsschrift" i 10 25 52 388 and the bends applied are upwards.

of the opening edges serve only to reduce warpage as much as possible. j

Although it is possible to use special auxiliary devices to accurately adapt the ends of the built-in parts to be welded to the circumference of the opening edge, this work is also very considerable and increases the manufacturing costs. Incidentally, welding by welding interferes with machine welding insofar as the welding seam can become porous in the case of mechanical over-welding of the places of the preceding connection. j

The same problem also arises, of course, when in the water-bearing housing of a boiler a service water preparation device must be installed, j in which one housing wall must have an opening to keep the opening for cleaning the service water reservoir accessible. Furthermore, the problem also arises where pipe stubs have to be inserted through openings and then welded when the pipe stubs have already been welded to some insert. Here too, n.l. it is often not ensured during the manufacture of an insert beforehand that the pipe stub to be pushed through is so precisely against the insert that it is precisely aligned with respect to the piercing opening.

The invention therefore has the problem Basis to provide a connection embodiment, whereby! i— y j__________________________! 7906801 *

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- 3- s on the one hand, account is taken of the inevitable; deviations in shape of the built-in parts and which, on the other hand, make pre-fastening unnecessary, and thus the machine-automatic welding can be carried out immediately after assembling the parts.

According to the invention, this problem has been solved with the connection embodiment such that the edge of the piercing opening is provided with a neck-shaped protruding opening cone, in which the "structural outer diameter"]! 10 j of the insert in the connection area is equal to the smallest inner diameter of the opening ball. "Under" construction outer diameter ", the" diameter of the built-in part, which according to the construction drawing must be present, but which cannot usually be realized in practice, ie

a cylindrical tube sleeve, for example, which must be inserted and welded in, is not round in practice.

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The small additional costs resulting from the appropriate formation of the neck-shaped opening cone are out of proportion to the above-described, disadvantageous and hitherto taken measures to obtain a perfect weld connection, which of course in particular to considerable

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'as is the case with modern heating boiler manufacturing <! ! 25; is usually manufactured in large series.

• The inner cone of the neck-shaped opening cone pulls and pushes the insertable part into its precise piercing fit and creates a more precise, practically crevice-free adjustment, which no longer needs to be fastened beforehand. Even if not accurately in one! pipe stub positioned in relation to the piercing opening! . pen, (this is of course only minor deviations from the alignment), this directing effect occurs.

The invention will be further elucidated hereinbelow with reference to the drawing, in which, by way of example, embodiments of the connecting embodiment according to the invention are shown. In it shows:

Fig. 1 is a cross-sectional view of the front wall of a boiler house (not shown) with a cylindrical built-in part placed therein; i

Fig. 2 in section the front wall of a boiler house with built-in drinking water reservoir

Fig. 3 in cross section the piercing opening with a pipe stub to be cut through.

The object of Fig. 1 concerns the connection of a cylindrical insert 2, for example, which | i incorporates the combustion chamber and the heating gas passages (not shown 3). j

The edge of the piercing opening 6 in the front wall 15 (the same principle is applied for the rear wall) i is designed as a neck-shaped bulged opening cone 1.

With regard to its diameter, the end 3 on the insertion side of the built-in part 2, which for the reasons shown is practically never exactly round, corresponds with the inner diameter 4 of the opening cone 1.

When inserting the built-in part 2, whether it accidentally has a precise circular shape or, more likely, not round, an accurate result is obtained! and practically crevice-free connection between the opening cone 25 1 of the front wall 5 and the built-in part 2, which can then be welded together mechanically and automatically without any difficulties and without weld preparation with the high-quality weld seam quality available therewith. j

The exemplary embodiment according to Fig. 2 j 30 is in principle the same connection design, although this concerns the liquid-tight built-in connection j of the access side of a service water reservoir 7, which j is provided with a welded ring collar 8 for installation, which is attached to the end 31 on the insertion side may be provided with a small guide cone 9, as shown. j

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Fig. 3 shows a pipe stub 11 of I insertable into a corresponding conical shaped opening 10 of an insert 12, which deviates slightly from its aligned ideal position (dotted lines). Thanks to the opening cone 1, when fitting in 5 a fitting is created; aiming measure.

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Conclusion.

7906801

Claims (1)

_ 6_ I <* £ -Conclusion- Connection design for flat housing parts, in particular with curved upwards at the edges! front and rear walls provided with plug openings, which are welded together with cylindrical, 5 built-in parts, such as combustion chamber sleeves, container connecting stubs or similar parts, which are interlocked, characterized in that the edge is provided with the piercing opening (6) of a neck-shaped bulged opening cone (1),; wherein the structural outer diameter of the built-in part '10 (2, 8, 12) is designed in the connection area equal to the smallest inner diameter (4) of the opening cone (1). t t! ) i i Swrroi -------