Miniaturized magnetic device for direct current arc constraint control

Abstract

The invention discloses a miniaturized magnetic device for direct current arc constraint control. A positioning ring is arranged at one end of an electrode, a threaded baffle ring is arranged at the other end of the electrode, the magnet assembly is arranged on the electrode in a sleeved mode and is positioned between the positioning ring and the threaded baffle ring, a protective sleeve is arranged outside the magnet assembly, the direct current electric arc is generated and maintained in the electrode; the cooling medium is injected into the outer wall of the electrode through the positioning ring and is used for cooling the electrode. According to the invention, the service life increasing effect of the electrode is not influenced, and meanwhile, the size and the weight of the high-power direct-current arc plasma torch are remarkably reduced, the heat loss is reduced, the electric heating conversion efficiency is improved, and the overall structure of the plasma torch is simplified,and particularly the structure of the cooling medium channel is simplified, and the cooling efficiency is improved; the miniaturized magnetic device is assembled to form an independent component, part of the integral structure of the component is firm and reliable, the key component is protected in place, and the component is very easy to connect with other components.

Description

technical field [0001] The invention belongs to the technical field of plasma torch (Plasma Torch), and in particular relates to a miniaturized magnetic device for direct current arc confinement control. Background technique [0002] DC arc plasma torch is an electrothermal conversion device that can quickly (within 1-2s) generate ultra-high temperature (3000-10000°C), and has broad application prospects in ignition, combustion-supporting, metallurgy, environmental protection and other fields. However, the high-current and strong DC arc will cause serious ablation of the electrode of the plasma torch, which will shorten the service life of the electrode sharply, which is one of the main factors that limit the large-scale engineering application of the plasma torch. The existing solution is to arrange electromagnetic coils around the electrodes, and use the static magnetic field generated by the electromagnetic coils to promote the high-speed rotation of the arc to reduce the...

AI Technical Summary

Problems solved by technology

This method has a significant effect on increasing the life of the electrode, but the volume and weight of the electromagnetic coil are huge, and a certain heat loss will be generated when the current passes through the coil. The stronger the required magnetic field, the greater the heat loss, which is harmful to the plasma torch. Cooling design, ease of use and maintenance, and electrothermal conversion efficiency will all have certain adverse effects

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