Online UV (Ultraviolet) coating system of hotly-galvanized steel pipe and galvanized strip pipe

Abstract

The invention discloses an online UV (Ultraviolet) coating system of a hotly-galvanized steel pipe and a galvanized strip pipe. The online UV coating system comprises a roller bed conveying device, a UV spraying room, a curing room and an exhausting device, wherein the roller bed conveying device is provided with a plurality of conveying rollers which are arranged in parallel and are used for conveying the hotly-galvanized steel pipe or the galvanized strip pipe; the UV spraying room is internally provided with a spraying mechanism; the spraying mechanism comprises a plurality of spraying guns which are arranged on the same circle; the circle centers of the plurality of spraying guns and the axis of the hotly-galvanized steel pipe or the galvanized strip pipe are collinear; a first vent hole is formed in the top of the UV spraying room; the curing room is adjacently arranged on the rear section of the UV spraying room; the curing room is internally provided with a plurality of UV curing lamps which are arranged on the same circle; the circle centers of the plurality of s UV curing lamps and the axis of the hotly-galvanized steel pipe or the galvanized strip pipe are collinear; and a second vent hole is formed in the top of the curing room. The system can be used for treating the surfaces of the hotly-galvanized steel pipe and the galvanized strip pipe to form UV coatings, so that the service life of the product is prolonged and the coating efficiency is high.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an online UV coating system for hot-dip galvanized steel pipes and galvanized strip pipes. Background technique [0002] Hot-dip galvanized steel pipe is a welded steel pipe with a hot-dip or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Hot-dip galvanized steel pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oil fields, and oil heaters and condensing pipes for chemical coking equipment. Pipes for coolers, coal distillation washing oil exchangers, trestle piles, and support pipes for mine tunnels, etc. [0003] At present, the surface of hot-dip galvanized steel pipes for industrial use (that is, galvanize...

AI Technical Summary

Problems solved by technology

[0003] At present, the surface of hot-dip galvanized steel pipes for industrial use (that is, galvanized strip pipes) is generally not resistant to corrosion, easy to oxidize, and white powder or spots appear on the surface, which seriously affects the appearance and life of the product.

Images