Vacuum device for platinum passage

Abstract

The invention discloses a vacuum device for a liquid crystal glass platinum passage. The vacuum device is adopted, so that the gas pressure of an area near the molten glass in a platinum passage classifying tube is in the negative pressure state relative to the gas pressure in the passage outside environment. The vacuum device is in the form of a right-angled bent tube, wherein the bent tube comprises a horizontal part and a vertical part; a fine tube, diameter of which is smaller than that of the bent tube, is arranged on the top end of the vertical part; another fine tube is inserted to the bottom end of the vertical part; the horizontal part extends to an air vent outside the classifying tube, and is firmly matched with the air vent of the classifying tube; the another fine tube is ventilated with high-pressure air to generate exhausted air stream, so that the contact part of the horizontal part of the bent tube and the air vent of the classifying tube can be in a negative pressure state. The diameter dimension of the device is smaller than the inside area width of the passage, so that the vacuum device is easily dismounted and mounted; moreover, the gas overflowing from the molten glass in the classifying tube can be quickly discharged, so that the classifying time of the molten glass is shortened, and the quality of the molten glass is ensured to satisfy the process requirements.

Description

Technical field: [0001] The invention belongs to the field of TFT liquid crystal glass manufacture, and relates to a negative pressure device used in a platinum channel of TFT liquid crystal glass. Background technique: [0002] In the production and manufacture of TFT glass, a large amount of gas overflows during the clarification process of the molten glass in the platinum channel. The gas pressure in the vicinity of the molten glass is equivalent to the ambient air pressure outside the platinum channel, so the gas overflowing from the molten glass cannot be discharged to the outside of the channel in a timely and effective manner, resulting in the air pressure above the molten glass inside the clarification tube being equal to the gas overflow pressure in the molten glass. The solubility of the gas in the molten glass is basically stable, so that the gas in the molten glass is not easy to overflow. In this way, on the one hand, the clarification time of the molten glass i...

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Problems solved by technology

[0002] In the production and manufacture of TFT glass, a large amount of gas overflows during the clarification process of the molten glass in the platinum channel. The gas pressure in the vicinity of the molten glass is equivalent to the ambient air pressure outside the platinum channel, so the gas overflowing from the molten glass cannot be discharged to the outside of the channel in a timely and effective manner, resulting in the air pressure above the molten glass inside the clarification tube being equal to the gas overflow pressure in the molten glass. The solubility of the gas in the molten glass is basically stable, so that the gas in the molten glass is not easy to overflow. In this way, on the one hand, the clarification time of the molten glass is prolonged, and on the other hand, the gas that is not discharged in time remains in the molten glass. quality of glass

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