Flow gate device for glass melt

Abstract

The invention provides a feed device capable of guaranteeing high uniformity of glass melt before entering molding production and meeting high feed requirements, in particular to a flow gate device for the glass melt. The flow gate device comprises a flow gate, a gas burner, and an upper thermal insulation layer and a lower thermal insulation layer arranged on the flow gate, wherein a modular stirring unit is arranged on the flow gate; a stirrer in the modular stirring unit is rotated by a driving motor; the speed of the stirrer is adjusted by a variable frequency controller; the rotating direction of the stirrer is adjusted by a universal joint shaft. According to the invention, the uniformity of the glass melt in a glass feed channel is obviously improved under the condition that high feed requirement is met, and high uniformity level of optical glass is reached. When the device disclosed by the invention is applied to high aluminum ultra-thin float glass production, the quality indexes, such as glass reinforced quality, micro-waviness and the like, of glass plates are obviously improved, and the requirements in GB / T 20314-2006 thin float glass for liquid crystal display.

Description

technical field [0001] The invention relates to a feeding device, in particular to a forehearth device capable of improving the uniformity of glass liquid in the forehearth. Background technique [0002] In the production of glass industry, the working part and supply channel of most kilns are heated by gas. Due to the volatilization of the molten glass components at high temperature and the inconsistency of the flow velocity of the molten glass in the vertical and horizontal cross-sections in the forehearth, there is inhomogeneity in the molten glass in the supply channel before entering the forming device. This inhomogeneity There is a certain impact on the production of subsequent molding and the quality of the product, especially in the production of ultra-thin glass products, serious situations may lead to direct scrapping of the product. [0003] At present, part of the forehearth is designed with agitator unit, and in order to improve the uniformity of the temperatur...

AI Technical Summary

Problems solved by technology

Due to the volatilization of the molten glass components at high temperature and the inconsistency of the flow velocity of the molten glass in the vertical and horizontal cross-sections in the forehearth, there is inhomogeneity in the molten glass in the supply channel before entering the forming device. This inhomogeneity There is a certain impact on the production of subsequent molding and the quality of the product, especially in the production of ultra-thin glass products, serious situations may lead to direct scrapping of the product

[0003] At present, part of the forehearth is designed with agitator unit, and in order to improve the uniformity of the temperature in the combustion space of the forehearth, a header-type forehearth burner is adopted, and a reasonable thermal insulation structure design and discharge design at the bottom of the forehearth are adopted. These Although the method can significantly improve the uniformity of the molten glass in the forehearth, it still cannot meet the requirements of high-quality production, such as high-quality ultra-thin high-alumina float glass and TFT substrate glass, which require high uniformity of the molten glass, which will cause serious The glass ribs and micro-waviness of the board surface are not up to standard

[0004] In addition, there is a special device made of Pt material as the forehearth feeding system. The TFT substrate glass produced by the overflow method represented by CORNING in the United States adopts this forehearth feeding method, and the glass using this feeding method The liquid uniformity is good, but because the feeding system uses a large amount of Pt material, the capital occupation is high, the service life of the device is limited, usually less than two years, the maintenance cost of the feeding system is high, and the feeding capacity is small. , usually the feeding capacity is much lower than 30 tons / day

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