Processing device for pipe inner face

Abstract

Abstract PURPOSE:To repair and prevent a corrosion crack on the inner face of a pipe by inserting a main body section and a laser radiation section into the pipe and radiating a laser beam to a corrosion crack section. CONSTITUTION:A pipe coating device 3 is fed into a pipe 4 via leg sections 8 provided on a main body section 1, when the arrival to the corrosion crack occurrence estimated position on the inner face of the pipe 4 is confirmed by a television 42 via a fiberscope 43, the legs 8 are extended, and the main body section 1 is fixed. Shield gas is fed into the pipe 4 from a gas cylinder 46 via a hose 47. A laser beam is transmitted into a radiation cylinder 19 from a laser oscillator 35 via an optical fiber cable 25, it is focused by lenses 37 and 38 and perpendicularly reflected by a reflecting mirror 40 and radiated on the inner face of the pipe 4 through a passing hole 39. The radiation cylinder 19 is rotated and moved in the longitudinal direction. Metal powder such as chromium is coated in advance at the corrosion crack position, chromium-coating is applied, and a corrosion crack is repaired.

Inventors

• 👤 Suemi Hirata
• 👤 平田　末美
• 👤 Masaharu Kusaba
• 👤 草場　正春
• 👤 Tokuo Morishige
• 👤 森重　徳男

Bibliographic Details