Process and arrangement for creating a partial pro

专利名称：Process and arrangement for creating a

partial protective gas atmosphere

发明人：MUELLER, EWALD, DIPL.-ING.,TEIG,

REINHARD, DIPL.-ING.

申请号：EP88114623.7申请日：19880907公开号：EP0308729B1公开日：19920415

摘要：In order to weld two tubes to one another which are arranged in a heatexchanger, it is necessary to fill the entire secondary volume of the heat exchanger withprotective gas. The novel process is to offer the possibility of partially creating aprotective-gas atmosphere only in the welding area. To this end, a cylindrical sleeve (2,11) is moved to the welding location through the one tube (6b) or through the openingprovided for the tube (6b) in the wall of the container (9) so that the sleeve (2, 11) isexposed there and is put over both tube ends (6a, 6b) or is put over the one tube end(6a) and is arranged above the opening in the wall of the container (9) for the other tube(6b). The two tube ends (6a, 6b) are then pushed closer together up to a small distanceapart. After this, protective gas is passed through the intermediate space (3) between thetubes (6a, 6b) and into the chamber (8) formed around the location to be welded. Finally,the tubes (6a, 6b) are centred in the desired position for welding. ……

申请人：SIEMENS AKTIENGESELLSCHAFT,SIEMENS AKTIENGESELLSCHAFT

地址：WITTELSBACHERPLATZ 2; W-8000 MUENCHEN 2,WITTELSBACHERPLATZ 2; W-8000 MUENCHEN 2

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