Corrugated steel plate coating device and coating method thereof

Abstract

The invention discloses a corrugated steel plate membrane laminating device which comprises a material conveyer, a guide machine for performing a plastic thin plate, a membrane laminating roller pressing machine, a cooling tank and a material outlet bracket which are connected with one another, wherein a material conveying bracket penetrates through the mechanisms. The invention also discloses a method for laminating a membrane by using the corrugated steel plate membrane laminating device. The invention has the advantages that a plastic thin plate is well laminated to the upper surface and the lower surface of a corrugated steel plate, so that the shortcoming that the a plastic laminated layer is easy to damage by corrugated forming by using the plastic laminated steel plate in the conventional technology is overcome; the hot-galvanized steel plate is not required to be immediately cooled and is directly put into a special heat preservation box for slow cooling; the temperature of a workpiece can be randomly monitored, and carbon dioxide gas can be filled into the heat preservation box, so that a phenomenon that a zinc layer is oxidized because of overhigh temperature of the hot-galvanized workpiece is avoided; subsequent processing is realized by using afterheat after the hot galvanizing of the workpiece; the corrugated steel plate is not required to be heated; energy is saved; and pollution to the environment is reduced.

Description

technical field [0001] The invention relates to a coating device and a coating method for a steel plate, in particular to a coating device and a coating method for a corrugated steel plate. Background technique [0002] Corrugated steel pipe culverts have the advantages of light weight, convenient installation, and short construction period. They are high-quality building materials that can replace reinforced concrete circular pipe culverts, slab culverts, box culverts, arch culverts, and passage bridges. They have been widely used in road and railway projects. . During use, there are running water, sand, sand or gravel in the culvert all the year round, and there are even debris flows in some areas, while the galvanized layer of the steel plate is only about 80 microns, which is easily washed and worn by water, sand and stones, so the damaged The galvanized layer does not protect the steel plate very well. There are roughly two solutions at present: one is to carry out se...

AI Technical Summary

Problems solved by technology

During use, there are running water, sand, sand or gravel in the culvert all the year round, and there are even debris flows in some areas, while the galvanized layer of the steel plate is only about 80 microns, which is easily washed and worn by water, sand and stones, so the damaged The galvanized layer does not protect the steel plate well

There are roughly two solutions at present: one is to carry out secondary anticorrosion on galvanized steel sheets, mainly by brushing asphalt paint, but the service life of asphalt paint is 1.5 to 3 years on average, which cannot reach the service life of corrugated steel culverts; Another way is to coat the hot-dip galvanized steel strip with HDPE film on the surface and then process it into a corrugated steel pipe, but this method is only suitable for steel strips with a thickness of less than 3mm. The extrusion force of the subsequent processing increases, which causes the HDPE plastic film to be partially torn, worn, and even peeled off from the corrugated steel sheet, which will eventually lead to the fact that the actual service life of the plastic-coated galvanized corrugated steel culvert cannot reach the expected number of years

Images