Device for cleaning of external surfaces of tubes in bundle has entry rod with preferably 90 degree branching jet medium feeds to nozzles, and may have at least two nozzles with oppositely directly jets to reduce blow back

摘要

The device for the introduction of at least one and preferably several jet nozzles (1) with jet deflection to clean the external surfaces of tubes in tube bundles has an entry rod (2) with preferably 90 degree branching jet medium feeds (3) to the nozzles. The device may have at least two nozzles with oppositely directly jets to reduce the blow back encountered by the flow of the jet medium. The device may have wheels or runners which engage on the uppermost tube position and serve for the guiding and height adjustment of the device.