Expansion vessel for transformer or choke cooling/insulating liquid

摘要

The vessel keeps the liquid completely separated in a gas- tight manner from the air outside by a sack-type membrane (5). A stable but flexible coolant resistant insulation hose (6) is provided as a permanent evacuation line to an evacuating device (3) at fastening points of the membrane. The hose (6) rises with its end opening below the membrane (5) and goes upwards directly to the fastening points with the evacuating device and is held and fastened to suspension points of the membrane (5). The insulating hose (6) has openings (6.3) distributed radially and axially around its circumference. The size and number of openings is such as to guarantee a reliable evacuation on all sides of the vessel space around the membrane.