Multiple-cathode central-axis anode arc plasma generator

Abstract

Provided is a multiple-cathode central-axis anode arc plasma generator. The multiple-cathode central-axis anode arc plasma generator is of a central-axis column anode structure, three or more than three cathodes are annularly and evenly arranged around an anode column, the anode and the cathodes are mounted and fixed on the same base and are mutually insulated, the base is provided with a water channel, an electricity channel and a gas channel, the outer surface of the column anode is relatively insulated, only a head portion close to an outlet is bared and conductive, thus an electric field is formed between the anode and the cathodes, the whole generator is in the shape of a sealed water-cooled barrel, one end of the generator is provided with a plasma outlet (nozzle), and the nozzle is used for carrying out mechanical compression on arc plasmas. The arc plasmas generated by the plasma generator are stable and concentrated, plasma arcs with the properties of high arc voltage, low current, laminar flow and long beam can be generated, the service life of the anode and the service life of the cathodes are long, the total power of the system is large, and working efficiency is stable and high.

Description

technical field [0001] The invention relates to a multi-cathode axial anode arc plasma generator with a new structure, which can form high-power high-temperature long-arc laminar flow plasma, and is an efficient high-temperature heat source generating device. Background technique [0002] At present, most plasma generators at home and abroad have a single-cathode structure, and the outer casing is a tubular anode. A single, high arc current is more likely to cause burnout of the cathode and anode, and the stability of a single arc is poor. Therefore, the normal and stable working time of this type of single-electrode generator is short, and parts need to be replaced frequently. Nowadays, only some foreign companies have developed 3-cathode plasma generators, and the anodes are mostly hollow tubular anodes surrounded by outer circles. The current shared by the single cathode of these generators is greatly reduced, so that the cathode and anode can run stably for a long time ...

AI Technical Summary

Problems solved by technology

[0002] At present, most plasma generators at home and abroad have a single-cathode structure, and the outer casing is a tubular anode. A single, high arc current is more likely to cause burnout of the cathode and anode, and the stability of a single arc is poor, so the working time for this type of single-electrode generator to operate normally and stably is short, and parts need to be replaced frequently

Nowadays, only some foreign companies have developed 3-cathode plasma generators, and the anodes are mostly hollow tubular anodes surrounded by outer circles. The current shared by the single cathode of these generators is greatly reduced, so that the cathode and anode can run stably for a long time Time, bring better economic benefits, but the design and manufacture technology of multi-cathode plasma generator has not yet been mastered in China

Moreover, the current 3-cathode plasma generator cannot generate laminar plasma beams, nor can it feed powder axially and centrally for a long time, and the power is relatively small

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