WELDED BELLOW Russian patent published in 2009 - IPC F16J3/04 

FIELD: welding works.

SUBSTANCE: bellow is meant for hermetic separation of media. The bellow contains series-joined membranes, profiled by concentric ring sections with possibility of approaching and parting, where each membrane is joined to one of the neighbouring membranes through an outside weld seam, and with the other - through an inside weld seam. Corrugation of composite membranes is made in form of a single complete wave. The wave can have different configurations. Configuration of the wave has two rounding radii R and R1 and is determined by the geometry of the shape of the ends of the corrugations, where 0.5R > R1. Each of the ends of the corrugations - inner and outer, can be perpendicular to the axis of the bellows or at an angle to the axis of the bellows, on the rounding, respectively, of the direction of the wave, or at an angle to the axis of the bellows, on the rounding, respectively, of the direction of the wave and is additionally curved with radius r, less than radius R of the main wave in the opposite direction with respect to the main wave, where r<0.15R.

EFFECT: reduced mechanical load in the zone of welded seams and increase in working pressure of the bellows.

8 cl, 10 dwg