Plasma generator based on glide arc discharge principle

Abstract

The invention discloses a plasma generator based on a glide arc discharge principle. The invention provides the plasma generator which can guarantee an anode to be cooled and can establish a protective atmosphere of a molten pool. The plasma generator comprises a cathode, the anode, a working gas channel, an insulator and an anode gas channel, wherein the cathode and the anode are installed and mutually matched through the insulator, a nozzle of the working gas channel is positioned between the cathode and the anode, the anode surrounds the cathode, the anode gas channel is formed in the anode, and an outlet of the anode gas channel is formed in the tail end of the anode, so as to form a protective gas nozzle of the molten pool. The anode gas channel is formed, so that the anode can be cooled by utilizing gas when the plasma generator is operated, thereby effectively controlling the temperature of the anode, and additionally, the gas sprayed from the anode gas channel can establish the protective atmosphere of the molten pool around plasma jet.

Description

technical field [0001] The invention relates to a plasma generator, in particular to a plasma generator based on the principle of sliding arc discharge for babbitt alloy, enamel, ceramics, amorphous alloy and other materials. Background technique [0002] Industrial devices often have some materials that need to be prepared with a layer of special functional materials on the surface, such as support bearings, which need to be prepared with a layer of Babbitt alloy material on the surface, and fluid conveying pipes that need to be prepared with a special layer of amorphous material (such as enamel) on the inner surface. etc.), in order to achieve functional requirements, because these materials have low melting points, are easy to oxidize, and are very sensitive to temperature, overheating will cause their structure to deteriorate, and at the same time, long-term high temperature will also cause serious segregation-like structural defects in the material, while existing method...

AI Technical Summary

Problems solved by technology

At present, the low-temperature plasmas that are widely studied and considered to have the most industrial application prospects are dielectric barrier discharge and corona discharge. However, they also have their own defects, such as: the electron density, electric field intensity and discharge energy distribution of corona discharge are not uniform, The partial discharge treatment area is too small, and the electrode geometry will affect the treatment efficiency; while the dielectric barrier discharge has obvious heating of the gas during the discharge process, the energy utilization rate needs to be improved, and the smoothness of the electrode is required to be high. The common feature of the form is that the arc is suppressed by high voltage and low current, so as to avoid a large amount of light and heat energy loss, so it has a high energy utilization rate; however, it also suppresses the energy input of the reactor, so in some cases it cannot meet the requirements of the industry. Application of high-efficiency treatment requirements for large flow of exhaust gas

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