METHOD OF HYDROPNEUMATIC CLEANING OF INTERNAL SURFACES OF HOLLOW ITEMS Russian patent published in 2016 - IPC B08B9/00 

FIELD: machine building.

SUBSTANCE: in the preliminary gas filled cavity of the item liquid is delivered from high pressure source of pneumohydraulic accumulator type. After pressure equalization in the source and cleaned cavity the later is connected to drainage main line to remove the gas/liquid mixture with contaminations. The drainage main line is closed, then gas under overpressure is supplied to the cavity, and the drainage main line is re-connected for the liquid complete drainage.

EFFECT: increased efficiency and reduced time of cleaning.

3 dwg