Ash scraping device for batched hot-dip galvanizing

Abstract

The invention discloses an ash scraping device for batched hot-dip galvanizing, and belongs to the technical field of hot-dip galvanizing. The ash scraping device comprises an electric trolley, an electric push rod, a speed reduction motor and a rotating shaft, wherein one end of the electric push rod is fixed to the electric trolley, the other end of the electric push rod is connected to the speed reduction motor, the speed reduction motor is driven to be lifted vertically through extension of the electric push rod, and an output shaft of the speed reduction motor is connected to the rotating shaft; a scraper blade and an infrared detector are fixed to the rotating shaft, and the blade width of the scraper blade is greater than a half of the width of a zinc pot by 5-10 centimeters. Ash scraping devices are used in a paired mode when used for removing ash and are arranged on guide rails on the two sides in the length direction of the zinc pot respectively. The ash scraping device has the advantage that mechanical operation of removing the ash on the surface of a zinc bath in the batched hot-dip galvanizing process can be realized, and traditional ash removal can be replaced.

Description

technical field [0001] The invention relates to a dust-scraping device for batch hot-dip galvanizing, which belongs to the technical field of hot-dip galvanizing. Background technique [0002] During hot-dip galvanizing in batches, the zinc pot is an open system, the zinc bath is in direct contact with the atmosphere, the metal zinc reacts with the oxygen in the atmosphere to form zinc oxide and floats on the surface of the zinc solution; when the workpiece is dipped, the zinc chloride on the surface of the workpiece The scum produced by the thermal decomposition of the ammonium-assisted plating salt film also floats on the surface of the zinc bath, which is the main source of zinc dust in the production process of hot-dip galvanizing. During hot-dip galvanizing in batches, the dipping of the workpiece is intermittent. Before dipping, the zinc ash on the surface of the zinc bath is manually scraped to the end of the zinc pot with a dust rake, and the mirror surface of the zi...

AI Technical Summary

Problems solved by technology

[0003] In production practice, traditional manual ash removal has three significant disadvantages: ①The depth of the zinc rake into the zinc bath is difficult to control stably, the speed of ash removal is uneven, there are many zinc particles in the zinc ash, and the ash production is high. The waste of zinc is large; ②Many people are occupied, and the work efficiency is low; ③Workers are in close contact with zinc baths, which affects their physical and mental health

Chinese patent (patent number: ZL90200624.X) and Chinese patent (notification number: CN102494544A) respectively disclose a scraper slag removal machine, and Chinese patent (patent number: ZL200510042376.X) discloses a ladle scum removal method , the liquid level environment and the operation process of the front and rear processes applied by these patented technologies are far from the batch hot-dip galvanizing process, and there is little significance for mutual reference.

Chinese patent (patent number: ZL201020223710.8) discloses a device for cleaning impurities on the surface of the galvanized liquid surface. It consists of two sets of heat preservation devices and impurity scrapers. The width of the scrapers is the same as that of the liquid surface in the zinc pot. The scraper is fixed on the heat preservation device and can rotate around a pin shaft to 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 to the zinc pot In the receiving tank at the end; with this patented technology, the zinc ash on the surface of the zinc bath can be cleaned before the workpiece is dipped, but the hanger is still above the zinc pot when the workpiece enters the zinc bath after dipping, so that the hanging The connecting steel wire or steel cable between the tool and the workpiece hinders the movement of the scraper; and as the zinc consumption continues to increase, the zinc bath liquid level in the zinc pot continues to drop, and it is necessary to replenish zinc ingots in the zinc bath or adjust the scraper in time. Board height position, which is impossible in actual production

[0004] However, due to the complexity of the size and shape of the workpiece to be plated, the limited operating space, and the discontinuity of the batch hot-dip galvanizing process, manual dusting has been used for 300 years since the invention of hot-dip galvanizing.

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