Understand the main structure and working principle of the lower float level gauge
2020.08.11
The float level gauge is a relatively common measuring instrument in the field of liquid level measurement, because it has a wide range of applications, flexible and convenient installation, as long as it is equipped with different float and inner rod materials, it can measure the liquid of any kind of medium. Bit.
In order to better enable users to use the float level gauge in liquid level measurement, improve the accuracy of measurement and effectively extend the service life of the level gauge product.
So what are the specific scope of application of the float level gauge? Now let's take a look.
First, the internal structure and working principle of the float level gauge:
The magnet and sensor (reed switch) in the floating ball change the number of components (such as fixed-value resistors) connected in series to the circuit, which in turn changes the electrical quantity of the meter circuit system. That is, the change in the position of the magnetic float causes a change in the electrical quantity. The status of the liquid level inside the container is obtained indirectly through the change of the electrical quantity.
The float level gauge can directly output the resistance signal for the output of the level signal, or it can be used with the Rl converter float level gauge to output the current value (4-20mA) signal; if the customer needs other signal types, you can pass Cooperate with other converters to output voltage signals and their switching signals (converters are distributed by the company according to customer requirements) to achieve remote transmission and control of electrical signals.
The converter is composed of electronic modules and is installed in the junction box of the sensor. The sensor converts the change of the liquid level into the size of the resistance through the magnetic coupling of the magnetic steel, and converts it into a 4-20mA.DC standard current signal by the converter, and sends it to the UQK-71B liquid level indicator or other secondary instruments. Realize long-distance liquid digital display. The magnetic float level gauge uses the float assembly as the measuring element. Through the buoyancy of the liquid, the float is moved up and down, driving the magnet at the upper end of the ejector rod to be up and down, and the magnetic coupling of the display assembly is turned over. It can track the liquid level change, so the display is eye-catching and the reading is intuitive. Because the display component is completely isolated from the measured medium, it is safe and reliable to use. The level gauge is suitable for various underground tanks and other containers, as well as the level display of containers that are not suitable for side openings; the float level gauge can be used for remote detection if the unit is equipped with a matching instrument to realize the automatic control function. The automatic control system of synthetic ammonia high-pressure liquid level detection composed of this liquid level gauge solves a long-standing technical problem in the small nitrogen fertilizer industry, and has obvious energy saving and consumption reduction effects.

The floating ball floats up and down with the change of the liquid level. The white steel at the top of the floating ball connecting rod moves synchronously. Through magnetic coupling, the indicator tube of the indicator is turned over 180° (liquid white gas red) to reduce the liquid level. The change is reflected on the indicator, which clearly indicates the height of the liquid level. When the measured surface has a large leather movement or a large range (>200mm), a protective tube can be added to the float and the connecting rod to prevent the connecting rod from bending due to fluctuation or excessively long connecting rod. The alarm is composed of a reed switch or a reed switch with memory and an explosion-proof junction box, fastened on the outside of the measuring tube tower, the alarm is driven by the top of the floating ball connecting rod, and the output alarm switch signal is sent to RZ -UQK-71A type liquid level display controller or other secondary instruments, realize remote liquid level upper and lower limit alarm and light display. Transmitter float level gauge is composed of liquid level sensor and converter. It is composed of a number of reed pipes and resistors installed in a middle 20 stainless steel tube, fastened on the outside of the inner tube, and the alarm structure and installation.
The product characteristics of the float level gauge: wide application range, various installation forms, suitable for the measurement of any medium level, interface, and the measured medium is completely isolated from the indicating structure, good sealing performance, anti-exposure, high pressure, high temperature, and corrosion Liquid level measurement under the conditions, high reliability, integration of on-site indication, remote transmission, alarm control switch, and free adjustment, complete functions, two-color indication with luminous, continuous and intuitive, eye-catching, large measuring range, and the observation direction can be arbitrary The change has good vibration resistance and can adapt to the situation of large fluctuations in the liquid level. The working structure is simple, the installation is convenient, and the maintenance cost is low. The exquisite magnetic steel corrector can be adjusted at will on site. The pointer-type magnetic tracking level gauge is used to directly indicate each The height of the liquid level in an open or pressure vessel. Compared with the commonly used glass tube level gauges on industrial equipment, this meter is not afraid of breaking and has a clearer indication. It is suitable for oil loss that has a viscous effect on the glass wall. Direct indication of similar liquid media or toxic and harmful media.


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