Online monitoring device for monitoring electro-slag furnace water cooled cable and online monitoring method for monitoring electro-slag furnace water cooled cable

Abstract

The invention discloses an online monitoring device for monitoring an electro-slag furnace water cooled cable and an online monitoring method for monitoring the electro-slag furnace water cooled cable. The online monitoring device is connected with the water cooled cable and comprises current detection parts, signal converters, a PLC substation input channel, a PLC and a computer. There are multiple current detection parts of which the input ends are connected with each water cooled cable. There are multiple signal converters. The output ends of the current detection parts are connected with the input ends of the corresponding signal converters. The output ends of the signal converters are connected with the input end of the PLC substation input channel. The output end of the PLC substation input channel is connected with the input end of the PLC. The PLC performs operation of the input signal and transmits the operation result to the computer to perform recording and displaying of thecorresponding information. Real-time process monitoring of the water cooled cable is performed, and the fault location is timely detected and judged so that the accident of smelting interruption caused by breakage of the water cooled cable can be avoided.

Description

technical field [0001] The invention relates to electroslag furnace smelting technology, and more specifically relates to an on-line monitoring device and a monitoring method for monitoring water-cooled cables of electroslag furnaces. Background technique [0002] The principle of electroslag furnace smelting electrodes is as follows: figure 1 As shown, during smelting, a large current is passed through the auxiliary electrode 1 and the steel ingot 2 to be smelted, so that the steel ingot 2 to be smelted is melted at a certain speed and then recrystallized and cooled in the crystallizer to form a steel ingot with new quality properties. The current comes from the copper bar 3 of the short network of the transformer, passes through the water-cooled cable copper joints 4 and 5, the water-cooled cable body 6 and 7, and the water-cooled cable copper joints 8 and 9 respectively, and meets at the confluence copper bar 10, passes through the transition piece 11, and assists The el...

AI Technical Summary

Problems solved by technology

[0007] In the actual production process, the water-cooled cables frequently flex and bend with the movement of the electrodes and the corrosion of the cooling water during smelting, and the water-cooled cables will gradually break. The current passing through the cable will be different. The greater the difference in the number of broken strands, the greater the current difference. With the accumulation of production load, when one of the strands is completely broken, all the current load will be borne by the other current. It will cause the cable to be overloaded, and the temperature will increase, which will aggravate the deterioration of its electrical conductivity. In the short term, it will also completely break the strands, resulting in production interruption.

At present, the maintenance strategy of electroslag furnace water-cooled cables generally adopts the method of periodic replacement. Due to the differences in the ingot type, steel type and production rhythm smelted by the electroslag furnace, as well as the structural form of the water-cooled cable itself and the site environment, etc., The periodic replacement of water-cooled cables for electroslag furnaces can easily lead to over-maintenance or under-maintenance of the components, and it is difficult to effectively control the status of water-cooled cables. make an impact

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