Overflow device for photomultiplier tube glass

Abstract

The invention belongs to the technical field of glass tube manufacture, and provides an overflow device for photomultiplier tube glass. The overflow device for the photomultiplier tube glass, providedby the invention, is provided with a groove type sunken overflow pool; the upper end surface of a wall surface of one side of the sunken overflow pool in contact with a material basin, namely a frontwall surface, is flush with the upper end surface of a material basin; the back wall surface of the sunken overflow pool is higher than the front wall surface, and is in contact with an upper insulating layer arranged above the overflow device and the material basin; the bottom surface and the side surface of the sunken overflow pool are respectively provided with a lower insulating layer and a side insulating layer; the front wall surface of the sunken overflow pool is provided with a through hole for mounting an overflow port sill; the overflow port sill is provided with sill bricks and a height adjusting mechanism; the middle part of the bottom surface of a groove of the sunken overflow pool is provided with a Y-shaped overflow discharge opening; and the lower insulating layer positioned at the bottom of the sunken overflow pool is provided with a discharge opening communicated with the Y-shaped overflow discharge opening. The overflow device provided by the invention meets the requirement of optical glass manufacturing quality and reduces the waste of high-quality molten glass.

Description

technical field [0001] The invention belongs to the technical field of glass tube manufacturing, and mainly relates to an overflow device for photomultiplier tube glass. Background technique [0002] Photomultiplier tube glass is mainly used for the glass shell and light window part of photomultiplier, which is the receiving part of the photomultiplier tube light signal; because the photomultiplier tube is used for high-energy physics and weak light detection, the quality requirements of the glass itself are relatively high. [0003] The glass used for photomultiplier tubes belongs to medium borosilicate glass. At the back end of the device for manufacturing this kind of product, due to the requirements of the process, it cannot be sealed like the feeding channel, and there is volatilization of boron trioxide in the part of the glass body that is in contact with the air. As a result, a silicon-rich layer is formed on the surface, causing the glass liquid to be uneven. Once i...

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Problems solved by technology

[0003] The glass used for photomultiplier tubes belongs to medium borosilicate glass. At the back end of the device for manufacturing this kind of product, due to the requirements of the process, it cannot be sealed like the feeding channel, and there is volatilization of boron trioxide in the part of the glass body that is in contact with the air. As a result, a silicon-rich layer is formed on the surface, resulting in uneven glass liquid. Once it enters the formed glass liquid, it will easily affect the transmittance and appearance quality of the glass body. If the situation is serious, the product will be scrapped directly.

[0004] At present, there is also a device installed in the glass liquid channel to discharge the glass liquid with uneven surface, but there are problems such as uncontrollable discharge depth of the silicon-rich layer material liquid and backflow of the material liquid, but it still cannot effectively solve the problem of producing high-quality photomultiplier tube glass. question

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