Heating device for flat glass

Abstract

The invention discloses a heating device for flat glass. Key points are that: the heating temperature inside a furnace cavity is controlled through the temperature of a heater arranged at the air inlet of a thermal circulating fan; and the temperature of each radiation-convection pipe and the convection heating strength on glass can be controlled through the magnitude of high-temperature gas flow (or pressure) in each pipe. Each radiation-convection pipe is arranged close to the upper and lower surfaces of the glass along the longitudinal direction (the conveying direction of the glass), so that a continuous and uniform radiation-convection zone is formed on a whole for performing radiation and convection heating on the entire upper and lower surfaces of the glass. Convection heating air flow is generated by the thermal circulating fan arranged inside the cavity, and an internal circulating air course is formed inside the furnace cavity, so that heat energy of the heater in a working process is transmitted to the glass surface continuously.

Description

technical field [0001] The invention relates to a heating device, in particular to a heating device for flat glass in glass tempering technology. Background technique [0002] A comparison is made for two types of heating equipment for flat glass that appear on the market. The first is that the heating element is set at the air inlet of the thermal circulation fan, and the radiation convection pipes are arranged near the upper and lower surfaces of the glass along the transverse direction (that is, perpendicular to the conveying direction of the glass), and the high-temperature airflow flowing into each radiation convection pipe The flow or pressure cannot be controlled separately, so that the temperature control in the width direction of the heating equipment cannot be carried out in different regions. For relatively large glass, the two sides are often overheated and the middle is insufficiently heated, resulting in wave deformation and bow deformation of the glass after b...

AI Technical Summary

Problems solved by technology

When the heating equipment is working, it takes a long time to inject cold compressed air into its inner cavity, which causes the pressure in the inner cavity to rise and has to discharge high-temperature air to the outside for a long time, which leads to excessive energy loss in the production process and the production of glass. The cost also increases

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