DE427588C - Nozzle attachment to steam boilers for high pressures - Google Patents

Description

GERMAN EMPIRE

ISSUED APRIL 8, 1926

REICH PATENT OFFICE

PATENT LETTERING

CLASS 13 a GROUP 1 (D 49146 Xj 13 a)

Company Dürrwerke Akt.-Ges. in Ratingen b. Dusseldorf.

Nozzle fastening on steam boilers for high pressures.

Patented in the German Empire on November 4, 1925.

In the case of steam boilers for high pressures, it has hitherto been very difficult to make the fastening of pipe sockets of larger diameter permanently durable and tight. ; According to the invention, a very [durable fastening for such pipe socket j is created, which secures against tearing out and completely seals even at the highest pressures. According to one embodiment of the invention ίο a backing ring a threaded ring is slipped with play onto the screwed into the Kesselöffnung- \ socket end and then screwed on and tightened. Now that part of the pipe socket lying in the plane of the support ring is widened from the inside by means of pipe rollers or the like in such a way that the pipe material completely fills the previously existing annular gap between the support and the support ring. This results in an extraordinary strength of the joint

connection of the pipe socket with the boiler]

achieved. :

On the drawing is an exemplary embodiment;

game of the invention shown. |

Fig. Ι shows the boiler with the nozzle j

in a possible size ratio- \

nis, while j

Fig. 2 and 3 show the nozzle in a larger '

Scale before and after rolling in

represents.

The pipe socket 1 is screwed with the thread 3 into an opening ■ of the boiler 4. Then a
Washer ring 5 pushed on, the inside diameter of which ■ leaves an annular space 6 free (Fig. 2). Then a threaded ring 7 'is screwed on and tightened. After this , the connection is pressed on by pipe rollers or the like, with the pipe part 8 being pressed into the annular space 6 according to Fig. 3 j • 20 and a | insoluble connection between nozzle and
Boiler is created. 1

Claims (2)

Patent Claims: 1. Nozzle fastening on steam boilers for high pressures, characterized in that that the threaded neck end is screwed into the boiler wall and provided with a threaded ring and that a pipe part lying between the boiler wall and the threaded ring is expanded is. 2. nozzle attachment according to claim 1, characterized in that the with Threaded nozzle end screwed into the boiler wall from the inside a washer is pushed on with play and then a threaded ring is screwed on and is tightened, whereupon the pipe part lying in the plane of the washer ring is expanded by means of pipe rollers or the like which fills the previously existing annular space between the nozzle and the washer ring.