Equipment for removing earth around buried cables or empty pipes

摘要

The equipment (10) pushed over the cable (11) comprises a nozzle carrier (1) and a connecting element (2) welded together with inner and outer annular seams (4,5). The nozzles (8) project from the leading end of an annular channel (9). The soil is separated from the cable by jets of flushing liquid under pressure of 200 to 300 atmospheres from an internal channel (19) in the coupling (3) so that the cable can be pulled out. The equipment is propelled by means of a rod driven by a mobile power unit.