CONNECTION DEVICE Russian patent published in 2012 - IPC F16L37/00 

FIELD: construction.

SUBSTANCE: seat in a device and a nozzle end coupled with the seat are arranged as monotonously narrowing inside the device and are formed by cylindrical steps, besides, on the surface of an external seat ledge of a larger diameter there is a threaded section arranged, and a ledge of a larger diameter on the nozzle is made in the form of a fixing collar. The nozzle is covered with a pressing bushing capable of its rotation and axial displacement. On the external surface of a pressing bushing at the side of the fixing collar there is a threaded section arranged with cylindrical thread responding to the thread of the external seat ledge. Smaller steps of the seat and the nozzle are made as capable of forming a closed gate for a circular sealing gasket, and also with the possibility to press the latter as the pressing bushing is screwed into the external step of the seat until the fixing collar rests against a flange between the external ledge and the ledge adjacent to the latter. At the same time the nozzle is made from two parts connected by means of butt welding of their ends and arranged with the possibility to install the pressing bushing prior to the start of welding at least on one of these parts without coverage of the welding area with this bushing.

EFFECT: invention increases reliability to connect a channel in a device and an outer pipeline.

3 cl, 4 dwg