Purging inspection device of continuous casting three-machine three-flow spraying system and purging inspection method

Abstract

The invention discloses a purging inspection device of a continuous casting three-machine three-flow spraying system. The device comprises a second-cold water main pipe, a nitrogen main pipe, a first-flow spraying system, a second-flow spraying system and a third-flow spraying system, wherein one end of the second-cold water main pipe is connected to a second-cold water pipe network, and the other end is respectively connected to the first-flow spraying system, the second-flow spraying system and the third-flow spraying system through three second-cold water branch pipes; four spraying pipes are respectively arranged in the first-flow spraying system, the second-flow spraying system and the third-flow spraying system; the second-cold water branch pipes are communicated with corresponding four spraying pipes; and one end of the nitrogen main pipe is connected to a nitrogen pipe network, and the other end is respectively connected to each spraying pipe through metal hoses. The purging inspection device of the continuous casting three-machine three-flow spraying system can effectively drain water remained in the spraying pipes and nozzles to largely reduce the formation of incrustations and to effectively reduce the blockage rate of the nozzles.

Description

technical field [0001] The invention relates to the technical field of continuous casting secondary cooling, in particular to an inspection and purging device and an inspection and purging method for a continuous casting three-machine three-flow spray system. Background technique [0002] After decades of development in my country's iron and steel continuous casting industry, the secondary cooling technology is changing with each passing day, and its cooling methods and types have also made great progress compared with the past, but the maintenance and testing problems of the spray system cannot be ignored. , and even some units have caused a large number of appearance quality problems of the slab due to the lack of maintenance of the secondary cooling system, and what is more, problems such as breakout, square off, round off, and slab deviation. [0003] Especially when the production of the continuous casting machine cannot be carried out continuously, because the secondary...

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Problems solved by technology

[0002] After decades of development in my country's iron and steel continuous casting industry, the secondary cooling technology is changing with each passing day, and its cooling methods and types have also made great progress compared with the past, but the maintenance and testing problems of the spray system cannot be ignored. , and even some units have caused a large number of appearance quality problems of casting slabs due to the lack of maintenance of the secondary cooling system, and what is more, problems such as breakout, square off, round off, casting slab deviation, etc.

[0003] Especially when the production of the continuous casting machine cannot be carried out continuously, because the secondary cooling water mostly uses turbid water or circulating water as the medium, and its ingredients mostly contain calcium oxide, iron oxide, silicon oxide, magnesium oxide, etc. When it is discharged from the secondary cooling pipe network, it is easy to adhere to the spray pipe and the inner wall of the nozzle, thereby affecting the cooling effect of the secondary cooling and even causing serious problems such as no water coming out of the nozzle, which brings great hidden dangers to the quality of the slab and continuous casting production

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