Mine mineral extracting machine spray nozzle - has protruding scanner extension pressing stop against valve seat, under mineral pressure

摘要

The spraying aperture of a blocking unit has its movements controlled by the mineral being extracted, in a spraying nozzle used for combating dust on a machine working in a mine. The blocking unit (12) is coupled to a scanner extension (28). Th9s This protrudes from a outward-leading hole in the nozzle (1), and presses the blocking unit, under pressure from the mineral, with a sealing effect against a valve seat (10), against sprayed fluid pressure. The continuation and blocking unit may be monolithically combined. Fluid is supplied only during a predeterminable part of the time, during machine operation, and simplified structure is less easily blocked, and more reliable.