Ash scraping device for hot-dip galvanizing before dip plating

Abstract

The invention discloses an ash scraping device for hot-dip galvanizing before dip plating, belonging to the technical field of mechanized operation for batch of hot-dip galvanizing. The device comprises electric trolleys, electric push rods, a gear motor, a rotation shaft and a bearing support, wherein guide rails are arranged on the two sides of a zinc pot, the electric trolley I and the electric trolley II are respectively arranged on the guide rails, and the lower ends of the electric push rod I and the electric push rod II are respectively to the electric trolley I and the electric trolley II; the gear motor is fixed at the upper end of the electric push rod I, and the output shaft of the gear motor is connected with one end of the rotation shaft; the other end of the rotation shaft is fixed on the bearing support, and the bearing support is fixed on the telescopic rod of the electric push rod II; a scraping plate and an infrared detector are arranged under the rotation shaft. The ash scraping devices are used in pairs in the ash scraping operation and are respectively distributed at the two ends of the zinc pot on the length direction. The ash scraping device mechanically scrapes ash on a zinc bath surface before dip plating in the process of batch of hot-dip galvanizing during working, replaces traditional manual ash scraping, and improves the operating environment.

Description

technical field [0001] The invention relates to a dust scraping device used before hot-dip galvanizing and belongs to the technical field of mechanized operation for batch hot-dip galvanizing. Background technique [0002] During the batch hot-dip galvanizing process, the liquid zinc in the zinc pot reacts with the oxygen in the air to form zinc oxide that floats on the surface of the zinc pot. When the workpiece is dipped, the scum produced by the thermal decomposition of the helper salt film on the surface of the workpiece also floats on the surface of the zinc bath, which is the main source of zinc dust in the hot-dip galvanizing process. Before the hot-dip galvanizing process, the zinc ash on the surface of the zinc bath is manually scraped to the end of the zinc pot with an ash rake, the mirror surface of the zinc liquid is exposed in the zinc pot, the hanger above the zinc pot is lowered, and the workpiece is immersed in the zinc pot until it is submerged ; If the dus...

AI Technical Summary

Problems solved by technology

Traditional manual ash removal has the following disadvantages: ①The depth of the zinc rake into the zinc bath cannot be stably controlled, the speed of ash removal is uneven, more zinc particles are wrapped in the zinc ash, the ash production is high, and the zinc waste is large; ②Workers come into close contact Zinc pot, zinc ash and dust affect physical and mental health

Chinese patent (patent number: ZL201020223710.8) discloses a device for cleaning impurities on the galvanized liquid surface, which consists of two sets of heat preservation devices and impurity scrapers. 1 cm below the zinc liquid surface, when the heat preservation device moves along the guide rails on both sides of the zinc pot under the drive of the hoist, the scraper scrapes the zinc ash into the impurity receiving tank at the end of the zinc pot. Before dipping, the zinc ash on the surface of the zinc bath in the zinc pot can be cleaned; but this technology does not consider that the zinc liquid level in the zinc pot will drop with the increase of zinc consumption, so if the patent disclosure continues to work, it needs to be cleaned. It is impossible in actual production to ensure that the height of the zinc liquid level in the zinc pot remains unchanged or to readjust the position of the scraper every time the ash is hit.

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