玻璃管液位计是一种直读式液位测量仪表，适用于工业生产过程中一般贮液设备中的液体位置的现场检测，其结构简单，测量准确，是传统的现场液位测量工具。但是它由于材质常会出现如下问题：
Glass tube liquid level meter is a kind of direct reading liquid level measuring instrument, which is suitable for the on-site detection of liquid position in general liquid storage equipment in the industrial production process. It has simple structure and accurate measurement, and is a traditional on-site liquid level measuring tool. However, due to its material, it often has the following problems:
1.当玻璃管由于意外事故突然破碎时，需要更换玻璃管。
1. When the glass tube is suddenly broken due to an accident, the glass tube needs to be replaced.
先将卡箍，防护罩拆卸下来，再松开上，下阀门的连接螺母，取出填料压盖和密封垫圈，去掉破碎的玻璃管，然后应顺次将连接螺母，填料压盖，密封垫圈套于玻璃管的两头，先将玻璃管的下端插入下阀门，再将上端插入上阀门，旋扭连接螺母，基本紧固玻璃管，待装上防护罩后再旋紧，用卡箍锁紧。
First remove the clamp and protective cover, then loosen the connecting nuts of the upper and lower valves, take out the packing gland and sealing washer, remove the broken glass pipe, then cover the connecting nut, packing gland and sealing washer on both ends of the glass pipe in sequence, first insert the lower end of the glass pipe into the lower valve, then insert the upper end into the upper valve, screw the connecting nut, and basically fasten the glass pipe. After installing the protective cover, tighten it and lock it with clamps.