MACHINE FOR APPLYING PROTECTIVE COATING ON PIPELINE INNER SURFACE Russian patent published in 2008 - IPC B05C7/00 

FIELD: machine building.

SUBSTANCE: proposed machine designed to apply protective coat onto the pipeline inner surface incorporates a screw coupling-jointed to the drive geared motor output shaft, and the trolley rollers drive comprises two spur gears, one fitted on the coupling, the other one being fitted on the spacer shaft running in two bearings fitted on the trolley frame. One end of the above shaft supports a pulley to transfer rotary motion to the head, the other one supports a bevel gear in mesh with the like gear fitted on the rollers' shaft. The aforesaid rollers are coated with an elastic material, e.g. rubber. The proposed invention allows making the machine travel and the spraying head rotate.

EFFECT: reduced metal intensity, simpler design, higher reliability.

2 dwg