Electroslag furnace brush variable speed movement mechanism and control method

Abstract

The invention relates to electric brush motion mechanisms and control, in particular to an electric slag furnace electric brush variable motion mechanism and a control method to mainly solve the technical problems of abrasion of an electric brush of an existing electric slag furnace in the non-smelting state and the metal electrode ascending and descending speed limitation influenced by the electric brush limitation. According to the technical scheme, the electric slag furnace electric brush variable motion mechanism is composed of electric brush mechanisms, sliding executing mechanisms and fixing frames. The electric brush mechanisms are fixed to the lower ends of the sliding executing mechanisms, and the upper ends of the sliding executing mechanisms are fixed to the fixing frames. Each electric brush mechanism comprises an electric brush, an electric brush frame and a spring, wherein the electric brush is fixed in a hole in the end face of the electric brush frame, one end of the electric brush can stretch out to make contact with an electric conduction copper wall, the other end of the electric brush is connected with the spring abutting against the electric brush frame, the electric brush is connected with a brush braid through a wire, and the brush braid is connected with a fake electrode after being fixed by a brush braid tidying structure. The electric slag furnace electric brush variable motion mechanism and the control method are mainly used for special smelting.

Description

technical field [0001] The invention relates to a brush movement mechanism and its control, in particular to a variable-speed movement mechanism and control method of an electroslag furnace brush. Background technique [0002] With the improvement of manufacturing technology, the performance requirements of the material itself are increasing day by day, and the core position of high-end steel in some special fields is even more irreplaceable, and the special metallurgy equipment industry has also emerged as the times require. [0003] Different from ordinary smelting, special smelting has more complex equipment structure, operating environment and control requirements. As a member of the special metallurgy equipment, the electroslag furnace is based on the principle of resistance heating. The whole process is to take electricity from the grid, and then through the transformer and other mechanisms to adjust and convert it into a low-voltage and high-current output, and this l...

AI Technical Summary

Problems solved by technology

How to guide this electric energy to the metal electrode is the key at this stage, because the mobility of the electrode determines the way the brush conducts electricity, and the quality of the brush directly affects the quality of the output electric energy, and the characteristics of the power supply are also corresponding It determines the characteristics of the brush. For higher current density, manufacturers are required to choose high-copper brushes with better conductivity, which brings higher maintenance costs, operating costs and design requirements.

[0006] In the three operation stages of electroslag furnace, the preparation, progress and end of smelting, the metal electrodes are almost always in motion, and the brush, as a conductive bridge, also keeps relative motion with the conductive copper wall almost all the time. The state also limits the movement speed of the electrode in the non-smelting state and the service life of the brush

When the electrode is in the state of smelting preparation and end, the brush and the copper wall are still in contact. In order to protect the brush, the moving speed at this moment is also relatively slow. The service life of the brush, and the brush exists as a consumable in the entire electroslag furnace, it needs regular maintenance and replacement, which also increases the cost of use in all aspects; moreover, the brush passes through the copper wall After friction, it will cause the brush to heat up, which will also bring some safety hazards, which is also what the manufacturer does not want to see.

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