Zinc pot liquid level detection device

Abstract

The invention relates to a zinc pot liquid level detection device. The detection device comprises a constant temperature cabinet, a cooling mechanism, a liquid level sensor, a light filtering mechanism and a shading mechanism. The liquid level sensor is tightly attached to the cooling mechanism, the light filtering mechanism is arranged below the liquid level sensor, the cooling mechanism, the liquid level sensor and the light filtering mechanism are all mounted in an outer cabinet, and the shading mechanism is arranged below a constant temperature box. According to the scheme, the shading mechanism is arranged, light scattering interference of surface reflection of hot-dipped strip steel on laser ranging can be effectively avoided, and the accuracy and stability of liquid level detection are effectively improved.

Description

technical field [0001] The invention relates to a detection device, in particular to a zinc pot liquid level detection device, which belongs to the technical field of liquid metal liquid level detection. Background technique [0002] see figure 1 , the zinc pot 1 is one of the most important equipment on the cold rolling galvanizing line, its function is to heat the zinc liquid 2, and provide high-temperature zinc liquid that meets the requirements for the strip steel 3 that has been annealed in the heating furnace to enter the zinc pot for hot-dip plating , Form a metal protective layer on the surface of the strip to protect the strip substrate. The stability of the liquid level of the zinc pot has a great influence on the quality of hot-dipped steel strip products. The fluctuation of the liquid level of the zinc pot will cause slagging inside the furnace nose. The strip steel is scratched and the strip is taken out. Especially for the furnace nose production line with o...

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Problems solved by technology

[0004] 1) Most zinc pots use electromagnetic induction heating to heat and melt zinc. The electromagnetic field environment around the zinc pot is complex, and the temperature of the zinc liquid can reach up to 460°. The existing liquid level detection sensors are interfered by the strong magnetic field of the zinc pot and the high temperature The detection crash and signal distortion caused by harsh working conditions cannot meet the high-precision control requirements of the process for the liquid level of the zinc pot.

[0005] 2) There are many types and specifications of strip steel in the hot-dip galvanizing production line, and the surface gloss of strip steel after hot-dip galvanizing of different products is obviously different, and the surface will produce light reflection, refraction, and scattering, which directly affects visual image comparison, laser range finder, etc. The detection accuracy of the sensor seriously causes this type of sensor sensitive to ambient light to fail to work properly.

[0007] Retrieved the published patent "a slagging furnace nose and zinc pot liquid level control method, system and liquid level detection device CN110045759 A, the disclosed technology is mainly aimed at solving the problem that the zinc pot liquid level cannot be accurately controlled, and does not involve The detection accuracy and stable operation of the liquid level gauge itself

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