Abrasive entrained high pressure fluid jet nozzle.

摘要

A nozzle body (12) has a high pressure water inlet chamber (52) leading to a plurality of jet orifices (62) from which high pressure water jets (92) pass through a mixing chamber (54) with an exit defined by a nozzle mouth insert (20). Abrasive granules (18) are supplied through a flexible hose (26) received in a passage (42) in the body (12). A spring biased plunger (36) normally closes the hose (26) but can be retracted by a cable (24) to allow the granules (18) to pass from the passage (42) into the mixing chamber (54) where they are entrained by the jets (92).