B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
15/14, 15/96
B08B 3/02 (2006.01) B05B 13/04 (2006.01) B08B 9/093 (2006.01) B63B 59/06 (2006.01)
Patent
CA 1044863
AUTOMATIC SPRAY CLEANING APPARATUS AND METHOD Abstract An automatic high pressure spray cleaning appa- ratus and method for rapidly and efficiently removing material coated on the surface of an object are described. In accordance with the invention the axis of the cleaning liquid spray forms an acute angle with the object surface and such angle, as well as the distance along such axis between the spray nozzle and the object surface, are both maintained substantially constant over a given surface area. In addition, the pressure of the cleaning liquid at the surface of the object is also maintained substan- tially constant over such given area. The spray nozzles are automatically moved over the object surface along a predetermined path while maintaining the spacing distance and angle substantially constant by motor operated drive means which may be controlled by an electronic computer. The cleaning apparatus is especially useful for cleaning the interior surface of container tanks, such as chemical reactor tanks which contain internal baffles and other obstructions. The nozzles are mounted on folding support arms which are supported on a vertical shaft to fold such arms in and out relative to the axis of such shaft. In addition, the support shaft rotates the nozzles through a predetermined horizontal arc and also raises and lowers the cleaning apparatus. The cleaning apparatus is supported on a mobile derrick for movement of such appa- ratus along guide rails between a plurality of container tanks. The reactive forces produced by the liquid spray on the spray nozzles are balanced so that the total bending force exerted on the vertical shaft is kept at a minimum regardless of the position of the folding support arms carrying such nozzles.
233537
Helversen Frederick D.
Petermann James P.
Thomas Jack A.
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