Liquid level detection and protection device

Abstract

The invention relates to a liquid level detection and protection device. The liquid level detection and protection device comprises a measuring cylinder body, a signal converting mechanism, a liquid level detection mechanism and a liquid level indicating mechanism, the signal converting mechanism and the liquid level detection mechanism are arranged above the measuring cylinder body, and the liquid level indicating mechanism is arranged below the measuring cylinder body. Through the basic principle of using a floating cylinder to measure the liquid level, with the combination of a linear displacement detection technology of an LVDT (linear variable differential transformer), and through the linear transmission of a turbine worm, mechanical quantity change of the liquid level is linearly converted into electricity to be output to a technology control system; meanwhile, a limiting device is utilized to automatically control the height of the liquid level; a magnetic cylinder display device is further introduced, and the height of the liquid level can be visually displayed.

Description

technical field [0001] The invention relates to a detection device, in particular to a liquid level detection and protection device, which belongs to the technical field of mechanical electrical structure. Background technique [0002] At present, liquid level measurement is widely used in liquid level containers in the production process of industrial and mining enterprises. Among them, float type liquid level gauges and magnetic counterfeit liquid level gauges are mostly used, but the application effect is not good. Lan, the medium is introduced into the measuring cylinder, and then through the up and down movement of the buoy in the cylinder, the connecting rod and torsion bar are driven, and then the linear displacement is converted into angular displacement through the liquid level transmitter to output power for the next step of automatic control. Among them, the parts that are prone to failure are the falling off of the connecting rod, and the damage of the torsion ba...

AI Technical Summary

Problems solved by technology

[0002] At present, liquid level measurement is widely used in liquid level containers in the production process of industrial and mining enterprises. Among them, float type liquid level gauges and magnetic counterfeit liquid level gauges are mostly used, but the application effect is not good. Lan, the medium is introduced into the measuring cylinder, and then through the up and down movement of the buoy in the cylinder, the connecting rod and torsion rod are driven, and then the linear displacement is converted into angular displacement through the liquid level transmitter to output power for the next step of automatic control

Among them, the parts that are prone to failure are the falling off of the connecting rod, and the damage of the torsion bar after long-term operation, which directly leads to the failure of liquid level measurement.

The biggest disadvantage of the magnetic counterfeit level gauge is that it is easy to lose magnetism

Therefore, the above two groups of common liquid level measuring devices have unsatisfactory field application results. The liquid level measurement of the hot well of the No. 3 blast furnace blower unit in the thermal operation area of ​​Meishan Iron and Steel Co., Ltd. uses a buoy with torsion rod type liquid level gauge, and the failure rate is extremely high. Seriously affect the safe operation of the unit, so it is necessary for us to invent a new type of liquid level measurement mechanism that can work safely and stably to ensure smooth production

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