Detection device of molten steel liquid level in belt spraying packet

Abstract

The invention relates to a detection device of the molten steel liquid level in a belt spraying packet. The detection device comprises a floater 3, a floater rod 2, a liquid level detection mechanism 1 and a PLC system 5. The bottom of the floater rod 2 is installed on the floater 3, and the top of the floater rod 2 penetrates though a guide sleeve on the belt spraying packet 7; the floater 3 directly makes contact with molten steel 8 in the belt spraying packet 7 to drive the floater rod 2 to reflect the liquid level of the molten steel 8; the liquid level detection mechanism 1 is provided with an optical fiber sensor 4; the optical fiber sensor 4 is used for detecting displacement changes of the top of the floater rod 2 and feeds detection results back to the PLC system 5; the current liquid level of the molten steel 8 is worked out by the PLC system 5 according to the detection results. According to the detection device of the molten steel liquid level in the belt spraying packet, the height of the liquid level of the molten steel in the belt spraying packet can be accurately mastered, and accordingly steel can be continuously supplemented into the belt spraying packet in real time, the liquid level of the molten steel in the belt spraying packet can be kept constant and the quality of products can be further controlled.

Description

technical field [0001] The invention relates to a molten steel level control technology, in particular to a detection device for a molten steel level in a spray belt ladle. Background technique [0002] Existing molten steel level detection technologies include weighing method, microwave method, isotope method and eddy current method. Among them, the weighing method cannot meet the requirements of the load cell due to the continuous adjustment of the spray bag during the belt making process. The gravity method can only obtain a weight value, but cannot accurately obtain the liquid level information of the molten steel; the microwave method uses microwaves to project onto the liquid surface of the molten steel, and receives the echo signal, and determines the liquid level information by detecting the time difference between the emission and the reflected wave. The path is a high-temperature environment and the temperature of each point on the path is different, which causes u...

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Problems solved by technology

[0002] Existing molten steel level detection technologies include weighing method, microwave method, isotope method and eddy current method. Among them, the weighing method cannot meet the requirements of the load cell due to the continuous adjustment of the spray bag during the belt making process. The gravity method can only obtain a weight value, but cannot accurately obtain the liquid level information of the molten steel; the microwave method uses microwaves to project onto the liquid surface of the molten steel, and receives the echo signal, and determines the liquid level information by detecting the time difference between the emission and the reflected wave. The path is a high-temperature environment and the temperature of each point on the path is different, which causes unknown attenuation of microwave transmission speed, which makes this method unable to achieve accurate measurement; the isotope method ray source is placed above the molten steel level, and another ray receiver is placed At the bottom of the molten steel, when the ray penetrates the molten steel, its intensity will attenuate, and the liquid level height will be obtained. This method has high measurement accuracy, and the amorphous spray belt bag cannot open holes at the bottom of the molten steel, which determines that this method cannot be used. ; The eddy current method uses the principle of electromagnetic induction, and the actual liquid level is obtained by using the electric heat difference in direct proportion to the distance from the liquid steel surface. The spray tape bag needs to be heated during the tape making process, which produces a large magnetic field interference, and the liquid level measurement is not accurate. precise

[0003] At present, the liquid level measurement of the amorphous strip bag depends on the height change of the float rod by human eyes and manual adjustment of the tundish steel to maintain relative stability, which restricts the mass production of domestic amorphous strips

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