Method and device for hot-galvanising ribbed tubes

摘要

In a method for hot-galvanising ribbed tubes, the ribbed tubes of different geometries being flooded in the hot-galvanising trough in order to coat it with molten zinc or zinc alloy, the ribbed tubes run successively, on one treatment level and automatically, by means of a transport device consisting of supporting, guiding and driving rollers attached horizontally and vertically, through the treatment stages, which comprise degreasing, rinsing, pickling, heating, hot-galvanising, cooling, drying, chromising and blow-off stages or mechanical vibration/stripping devices, in order by means of additional parameters to guarantee as large as possible an application range while taking account of economy and the requirements relating to environmental protection. The device for carrying out the method comprises a feed device, a degreasing device with a blow-off device for degreasing agent, a rinsing device with a blow-off device for rinsing agent, a pickling device with a blow-off device for pickling agent, a rinsing device with a blow-off device for rinsing agent, a preheating furnace, a hot-galvanising furnace with a blow-off or mechanical vibration/stripping device for zinc, a cooling and drying device, a chromising device with a blow-off device for chromising agent, a removal device and a transport system, the components (1-10) of the plant being arranged in a line one behind the other. <IMAGE>