Method for replacing silicon carbide rod of float glass tin bath structure in hot state

Abstract

The invention discloses a method for replacing a silicon carbide rod of a float glass tin bath structure in a hot state, which comprises the following steps: S1, closing a molten glass inlet of a tinbath body, and enabling the float glass tin bath structure to be in a cutoff and production stop state; S2, turning off the power supply of the silicon carbide rod heating area where the damaged silicon carbide rod is located; S3, forming an opening in the tin bath large cover corresponding to the damaged silicon carbide rod; S4, allowing the partition area, where the open hole is located, in thecover to be a maintenance space, and the maintenance space is cooled through the open hole; S5, dismounting the damaged silicon carbide rod in the maintenance space, and replacing the damaged siliconcarbide rod with a new silicon carbide rod; and S6, after replacement is completed, closing and sealing the open hole. By means of the method, only the maintenance area needs to be cooled, other areasare kept warm, production is stopped, and maintenance cost is saved; after the silicon carbide rod is replaced, the production line can quickly recover production, and the working efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of float glass tin bath structure design and application, and in particular relates to a method for replacing silicon carbon rods in a hot state of a float glass tin bath structure. Background technique [0002] At present, there are more than 300 float production lines of different specifications in my country, and the kiln age is generally more than 10 years. The electric heating elements in the tin bath mostly use three-phase vertical silicon carbide rods. The three-phase vertical silicon carbide rod is mainly a special electric heating element made of silicon carbide material. Its shape is mountain-shaped, also called "mountain" type silicon carbide rod. As shown in Figure 1, it is installed vertically on the top cover structure of the tin bath when in use. The conductor part of the silicon carbide rod that is inserted into the inner rod body of the roof structure with a smaller resistance is called the...

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Problems solved by technology

[0003]In the later stage of the float production line, the silicon carbide rods are damaged due to improper operation of workers, or the resistance value of the silicon carbide rods that have been exposed to high temperature for a long time has increased, resulting in aging , these reasons will make it difficult to raise and adjust the local temperature in the tin bath, so as to affect the production regulation and operation of the tin bath

If it is considered to replace the old and aging silicon carbide rods with new silicon carbide rods, one way is to replace the silicon carbide rods in the tin bath in a cold state when the production line is shut down, which is equivalent to stopping the entire line for cold repair. The price paid will often be large, and the impact on production will last for a long time, causing unnecessary losses

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