DEVICE FOR LONG-RANGE JET TREATMENT OF SURFACES Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: device is intended for jet treatment of heating surfaces of boiler units with water or steam. Device has nozzle with holder in the form of barrel, frame provided with fastening unit for pivoted attachment in it of nozzle and power-driven mechanism for lifting-lowering and swinging in horizontal plane of nozzle. Installed on frame and connected with power drive is lead screw with nut seated on it. Also provided is facility for fixable change of pitch frequency of strokes in vertical plane. Mechanism for swinging nozzle in horizontal plane is made in the form of turnable arm with slot which is rigidly secured on vertical axle of turning fastening unit with possible fixable change of its position in horizontal plane relative to axis of swinging. It is connected with lead screw by means of lever with pusher fastened on lead screw. Pusher is installed in slot of turnable arm for possible reciprocating movement within aforesaid slot when lead screw is rotated, and also for possible fixable change in positioning of pusher on lever relative to axis of lead screw. In other version of device, facility for fixable change in pitch frequency of strokes in vertical plane is made in the form of rocker which is fixedly adjustable in length and by its one end it is rigidly connected with horizontal axle of nozzle turning in vertical plane. Other end of rocker by means of link, pivoted joints, and bracket is connected with nut which is fixed from turning and brought in motion by means of lead screw. Aforesaid embodiment of device ensures widening of operating potentialities, improvement in quality of treatment and in reliability of operation. EFFECT: higher efficiency. 5 cl, 2 dwg