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What are the types and features of flat water level gauges?

2021-09-15


What are the types and features of flat water level gauges?

Water level gauges are generally divided into four common types: flat water level gauges, low level water level gauges, glass tube water level gauges, and two-color water level gauges. In daily life, water level gauges are widely used, so the types and characteristics of flat water level gauges what is it?

What are the types and features of flat water level gauges?

1. The water level gauge is composed of steam valve, pressure plate, water valve, sewage valve, sewage pipe, glass plate and other structures. It is characterized in that a glass plate is used instead of a glass tube, and there is generally a groove on the inner side of the glass plate, and the water vapor is separated by the principle of refraction of light in the groove. At the same time, due to the different refraction principles of water vapor, it presents different colors, with clear boundaries and easy to observe.

If it is used in high temperature and high pressure environment, it is necessary to install inlaid mica sheets behind the glass plate to improve safety efficiency and prolong service life.

2. Low-level water level gauge If the operating surface of the water level gauge is 6m above the ground, a low-level water level gauge needs to be installed. There are two types of low-level water meters: mechanical and liquid column differential pressure.

The low-level water level gauge is based on the principle of hydrostatic pressure and detects the static pressure difference between two different liquid columns, so as to judge the range according to the specific gravity of the liquid in the indicator.

At the same time, the working fluid used can choose bright colors that are insoluble in water, which is easy to separate and distinguish. Since the water level gauge is not suitable for corrosive liquids, do not use low-boiling liquids under some high temperature conditions, and do not have stickiness to prevent sticky wear.

3. Glass tube water level gauge Tap water cock, cyclone cock and drain valve are generally connected with glass tube, the working pressure is generally less than 1.6MPa, and there are two kinds of flanges, DN15 and DN20. At the same time, the inner diameter of the glass tube is not less than 8 mm, and the thickness of the inner wall is not less than 3 mm.

During the installation process of the glass tube liquid level gauge, various threaded joints will be installed on various valves of the instrument to connect the existing container and flange to form a current connector, so that the glass tube can be directly observed and read. Get liquid level information. At the same time, in order to prevent the damage caused by the broken glass tube, it is recommended to install a protective cover. Generally made of thick temperature-resistant tempered glass.

4. Two-color water level gauge Two-color water level gauge is generally divided into three types: reflection type, anti-perspective type and transmission type. The reflective two-color water level gauge is a process of distinguishing values ​​by using the principle of refraction of light at different frequencies in water and steam and the reflection of prisms. The anti-reflection two-color water level gauge utilizes the principle of light transmission and reflection. Therefore, it presents a difference value. The working principle of the transmission type two-color water level gauge is basically the same as that of other water level gauges. The difference is that the light reflected by the reflector makes some light and shadow passing through the water appear green, and the light and shadow passing through the water vapor appear red, thus Represents the changing law of the water level.

 


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