DE474125C - Method for fastening lids (bases) to high pressure vessels, especially for high pressure steam systems - Google Patents

Description

GERMAN EMPIRE

ISSUED ON 2 (7 MARCH 1Θ2Θ

REICH PATENT OFFICE

PATENT LETTERING

CLASS 491 GROUP

Stephan Löffler in Berlin-Charlottenburg

Patented in the German Empire on April 12, 1924

In the following, a new method for attaching lids to high pressure vessels, especially for high pressure steam systems, described, which is essentially refers to lids on boiler drums without the use of screw connections or the like.

There are already cover constructions known in which the seal by the ίο Internal pressure is produced by itself, but special sealants are also used will. The new boiler design involves a lid lock, which is used for fastening and sealing of the lids of cylindrical vessels, in particular due to the shrinking effect of the cylinder wall compared to the inserted one Lid achieved and thereby a completely tight, even at high pressures, but not detachable with the usual means Lid connection can be produced.

Fig. Ι the drawing shows an embodiment of this type of boiler, in which the drum 1 at its end 2 with a Dekas angle 3 is to be sealed. The cover with the necessary connections, recesses, etc. can be made separately and independently of the boiler drum from a suitable material; only after production is it inserted into the heated end of the drum, as the upper part of Fig. ι shows. The cover is then fastened by the shrinkage forces when the boiler drum end cools down, and the drum end, especially when it is a matter of sealing against very high pressures, can also be mechanically processed in the sense of the indicated arrows by means of hammering, forging, rolling or the like The like. Be driven around the cover, as shown in the lower part of the figure, so that the cover is securely held at the side at α and at b and additional sealing points are created here. The essential thing, however, is that when the boiler drum end 2 cools down, the lid is securely fastened and sealed by radial and axial shrinkage. In order to make the sealing and the strength of the connection suitable for high pressure operation, after the cover has been inserted, shrink rings 4 must be pulled over the boiler drum end 2, whereby the tensions in the wall of the boiler drum end are also balanced out and expansion under high pressure is prevented. .

Fig. 2 shows a similar embodiment as Fig. 1, only with the difference that to bring about a multi-stage seal at different points α and b grooves 0 or the like. Are made in the insertion surfaces of the cover. - A screw connection can also be used instead of the grooves in the cover. In addition, in Fig. 2 this is

Drawing the shrink rings 5 onto the boiler drum is shown.

Fig. 3 shows that the cover 3 has a thin elastic extension 3 ', which once due to the shrinking effect of the boiler drum end 2 and the one pulled over it Shrink rings 4 and 5 and further by the effect of the internal pressure in the sense of drawn arrows is pressed tightly against the boiler wall.

The boiler drum itself can either be bent or welded in a known manner made of sheet metal or by rolling, forging, drawing or the like from a block will.

Claims (2)

Patent claims: i. Method of fastening Dekkein (Bottoms) on high pressure boilers, especially for high pressure steam systems, thereby characterized in that the separately manufactured lid in the heated cylindrical Kettle drum ends, which maintain the inside width of the drum, pushed in and shrink-wrapped the drum ends and, if necessary, by mechanical processing (hammering, forging, waking, etc.) and furthermore by subsequently pulling special shrink rings over the boiler drum ends firmly and tightly with the Boiler drum are connected. 2. The method according to claim 1, characterized in that the cover has an elastic Obtained continuation, which rests firmly on the drum wall due to the shrinkage of the boiler drum ends and through the internal pressure is also pressed against them. 1 sheet of drawings Berlin. Printed in the reichsdrdckereI.