Wall cleaning device for use in channel pit, has each jet nozzle providing additional connection for sand hose extending upward and centrally from within channel pit

摘要

Jet nozzles (5) are individually supported on spreading arms (15,21) within the channel pit. The arms are swiveled around a device axial center (3) by a drive motor (2) or retracted or extended by a servo unit (4). Each jet nozzle provides an additional connection for a sand hose (8) connected to a sand reservoir. The sand hoses extend upward and centrally from within the pit, allowing the entire device to rotate within 180 or 360 degree angle.