What is the structural composition of the quartz tube water level gauge?
Release time:
2022-10-09
What is the structural composition of the quartz tube water level gauge? The quartz tube water level gauge uses a float as the measuring element, and the float floats up and down with the change of the liquid level in the measuring tube. Through the coupling effect, the red and blue indicator tubes in the indicator are driven to rotate by 180 °. When the liquid level rises, the indicator tube changes from blue to red; when it drops, it changes from red to blue, so as to realize the two-color display of the liquid level. When the medium temperature is greater than or equal to 300 ℃, use the white and blue indicator tube.
What is the structural composition of the quartz tube water level gauge?
The quartz tube water level gauge uses a float as the measuring element, and the float floats up and down with the change of the liquid level in the measuring tube. Through the coupling effect, the red and blue indicator tubes in the indicator are driven to rotate by 180 °. When the liquid level rises, the indicator tube changes from blue to red; when it drops, it changes from red to blue, so as to realize the two-color display of the liquid level. When the medium temperature is greater than or equal to 300 ℃, use the white and blue indicator tube.
The alarm consists of a reed and an explosion-proof junction box, fixed on the outside of the measuring tube. The alarm is driven by the float, and the output alarm switch signal is transmitted to the secondary instrument to realize remote up and down alarm and light display. The transmitter consists of two parts: liquid level sensor and frequency converter. The sensor is composed of a reed tube and a resistor. The resistor is installed in a φ 20 stainless steel tube and fixed on the outside of the measuring tube. The converter consists of an electronic module mounted in a sensor junction box. The sensor converts the change of the liquid level into the resistance value through the coupling effect of the float, and the resistance value is converted into 4 ~ 20mA. The DC standard current signal is sent to the secondary instrument through the frequency converter to realize the remote display of the liquid level digital/mode.
Quartz tube water level gauge is generally used for liquid level measurement of atmospheric pressure or positive pressure environment containers, such as water tanks, open water tanks, etc. can use this type of flap level gauge. Moreover, the application range of the liquid level gauge is more and more extensive, the medium is more and more viscous, and the container with negative pressure environment is also started to use quartz tube water level gauge to measure. Due to the special negative pressure situation, the factors to be considered are relatively complicated, and measurement problems are likely to occur without consideration. In order to help users solve the problem of using the liquid level gauge with negative pressure, this paper analyzes the typical faults when using in negative pressure environment, the solution ideas and corresponding solutions are put forward to guide users to improve the ability of finding and solving faults.
The quartz tube water level gauge is completely isolated from the indicator device of the measured medium. It has the characteristics of good sealing performance and leakage prevention. It can adapt to the liquid level measurement under corrosive conditions with high reliability, good vibration resistance, simple structure, and convenient installation., Low maintenance cost, has been widely used in electric power, petroleum, chemical, metallurgy, environmental protection, shipbuilding, construction, food and other industries. In order to prevent fouling, under the condition that the low-temperature water reaches the boiling point, for the seawater desalination device in a negative pressure state, the normal operating time is about ten minutes, and the level gauge used by the user meets the process requirements. Generally speaking, the situation of negative pressure is not very common, so we do not need to worry about such failure problems in our daily use. Of course, it is necessary to understand it, just in case.
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