Vacuum glass air-exhaust port sealing structure and manufacturing method thereof

Abstract

The invention relates to a vacuum glass air-exhaust port structure. The structure is characterized in that: a round hole is provided on the upper glass of the vacuum glass, such that the air-exhaust port is formed; a round pipe is prepared and inserted into the round hole, and the upper end of the round pipe is welded with the upper glass; a sealing ring is prepared on the upper surface of the lower glass, and a recess or a recessed groove is prepared in the sealing ring, wherein the lower end of the round pipe can be inserted into the recess or recessed groove; after edge-sealing of the upper and lower glass, a metal solder is placed into the air-exhaust port or round pipe; the air-exhaust port is vacuumed and heated such that the metal solder is molten into liquid, and the liquid is retained in the recess or recessed groove and in the sealing ring; the lower end of the round pipe is also immersed in the liquid; and the air-exhaust port is automatically sealed according to a liquid sealing principle. The method provided by the invention can be used in mass productions. With the method, vacuum glass production efficiency and qualification rate can be greatly improved, and production cost can be reduced.

Description

Technical field [0001] The invention belongs to the field of vacuum glass, and in particular relates to a sealing structure of a vacuum glass suction port and a manufacturing method thereof. [0002] Background technique [0003] The existing vacuum glass is generally composed of two or three pieces of flat glass. The sides of the glass are sealed with low-temperature glass solder, and there is a tiny support in the middle. The thickness of 0.1~0.2mm between the two pieces of glass is formed by pumping. Vacuum layer. Since there is no heat and sound transmission of gas, and the inner surface of the glass can have a transparent low-heat radiation film, vacuum glass has good heat insulation and sound insulation effects, and is one of the best energy-saving glass. [0004] The key technologies of the existing vacuum glass include: one is edge sealing, the other is the placement of supports, and the third is the acquisition and maintenance of vacuum. There are mainly two methods for o...

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Problems solved by technology

The disadvantage of the first method is that the vacuuming process is complicated and the production efficiency is very low: because the suction pipe is very thin, the vacuum layer is very thin, the suction resistance is large, the speed is small, and single-chip extraction is required, so the production efficiency is very low; The two methods can solve the shortcomings of the first method, but because the low-temperature glass solder is made of a variety of oxides, under high temperature and vacuum, the air and moisture absorbed by the solder, volatile substances in the solder, and the solder during production The gas dissolved in the process and the decomposition of some oxides in the solder will cause a large number of bubbles in the solder, which will greatly weaken the performance of the solder, especially the air tightness, which will greatly affect the feasibility of this method.

Another method is between the above two methods, that is, prefabricating the air extraction port on the glass, then vacuumizing after sealing the edge at high temperature, and finally using solder to seal and weld the metal sheet on the air extraction port; The disadvantage is that if you use glass solder, you will encounter the same difficulties as the second method. If you use metal solder for brazing, you will encounter great difficulties in how to achieve airtight welding of small and light metal sheets under vacuum conditions. Its economic benefits are not necessarily better than the first way

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