DEVICE AND METHOD FOR APPLYING LUBRICANT TO SCREW THREAD SECTION OF STEEL PIPE.

摘要

A lubricant applying device (1) is provided with: a steel pipe support device (2) for rotating and supporting a steel pipe (P); a circulation system (3) for circulating a lubricant (9) adjusted to sprayable viscosity; a fixed amount supply device (4a) provided with a fixed-rate pump for supplying a fixed amount of the lubricant (9); a lubricant spray device (5a) having spray guns (19, 20) for spraying the lubricant from nozzles (19a, 20a); a spray gun support device (6) for supporting the spray guns (19, 20) in such a manner that the spray guns can move in the axial direction and/or the radial direction of the steel pipe (P); and a control unit (7) for controlling both the rotational speed of the steel pipe (P) rotated by the steel pipe support device (2) and the movement speed of the spray guns (19, 20) moved by the spray gun support device (6).