Ship sewage tank liquid level sensor

Abstract

The invention relates to the field of liquid level measuring sensors, and provides a ship sewage tank liquid level sensor which comprises a floater type magnetostriction liquid level sensor installed on the top of a sewage tank and a static pressure type liquid level sensor installed at the bottom of the side wall of the sewage tank. The floater type magnetostriction liquid level sensor comprises a magnetostriction probe rod, a flange and a floating ball. A cylindrical floating ball guide pipe is welded to the lower portion of the flange. The magnetostriction probe rod is installed on the flange through threads. The magnetostriction probe rod and the floating ball are both located in the floating ball guide pipe. The floating ball can freely move in the space defined by the floating ball guide pipe and the magnetostriction probe rod. A first elastic separation bag is installed outside the floating ball guide pipe. The first elastic separation bag is filled with first pressure conduction liquid. The floater type magnetostriction liquid level sensor and the static pressure type liquid level sensor work independently in a separated mode and are backed up for each other. The ship sewage tank liquid level sensor is high in anti-pollution capacity, capable of achieving continuous real-time monitoring, safe to use and reliable in work.

Description

technical field [0001] The invention relates to the field of liquid level measurement sensors, in particular to a liquid level sensor for a sewage tank of a ship, which is used for real-time, continuous and on-line monitoring of the liquid level of the sewage tank of a ship. Background technique [0002] The liquid composition in the sewage tank is complex, with many impurities, strong corrosiveness, and easy to breed microorganisms, resulting in the failure of float type liquid level gauges such as magnetic flaps and magnetostrictives, which are prone to sticking and rusting faults. Sludge and impurities are easy to deposit on the bottom of the sewage tank, resulting in the blockage of the pressure tap of the static pressure liquid level sensor and failure. The ship shakes and tilts during use, causing the liquid level in the sewage tank to slosh, and it is easy to generate foam, splashed droplets, etc. to adhere to and contaminate the measuring elements, resulting in the f...

AI Technical Summary

Problems solved by technology

[0002] The liquid in the sewage tank has complex components, many impurities, strong corrosion, and is easy to breed microorganisms, resulting in the failure of float-type liquid level gauges such as magnetic flaps and magnetostrictives, which are prone to sticking and rust failures.

Sludge and impurities are easy to deposit on the bottom of the sewage tank, which leads to the failure of the pressure tap of the static pressure liquid level sensor

The ship shakes and tilts during use, causing the liquid level in the sewage tank to slosh, and it is easy to generate foam, splashed droplets, etc. to adhere to and contaminate the measuring elements, resulting in the failure of ultrasonic, radar, laser and other types of liquid level measuring elements

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