Improved apparatus for preparing hollow glass optical fibre with medium silver/silver iodide

The utility model relates to an improved apparatus for preparing hollow glass optical fibre with medium silver/silver iodide, belonging to the optical fibre preparation field. The apparatus adopts an intermediate negative pressure bottle in the common preparation device, which not only has the action of negative pressure source, but also can be used as a waste liquor bottle to reduce the cleaning of the liquor pump; besides, the apparatus is provided with a micro pressure difference transducer control system, according to the principle that different flow speeds need different pressure differences, to use micro pressure difference transducer control system in the automatic control of the liquor pump can ensure that all reaction liquids in the capillary pass at a stationary flow speed, which realizes the automation of preparation technology.