Arc plasma torch having arc channel with abnormal diameter

Abstract

Provided by the invention is an arc plasma torch having an arc channel with an abnormal diameter. The arc plasma torch comprises an anode, a cathode, and an annular gas whirlcone. The anode is a circular tube with an abnormal inner bore diameter; the cathode is arranged in the inner bore of the anode circular tube; the gas whirlcone is arranged between the cathod front end and the anode; and the gas whirlcone, the cathode, and the inner bore of the anode circular tube are arranged coaxially. One end, provided with the cathode, of the anode circular tube serves as a gas inflow end and the other end serves as a gas outflow end; the anode circular tube is successively divided into a gas lead-in segment, a straight tube segment or reducing segment, a contraction segment, a groove segment and a nozzle segment; inner bores of the straight tube segment or reducing segment, the contraction segment, the groove segment and the nozzle segment of the anode circular tube forms an anode arc channel. And a tangential air flow channel is arranged at an annular wall of the gas whirlcone and is used for guiding gas into the inner bore of the gas whirlcone to generate an eddy air flow. According to the invention, the provided an arc plasma torch with the simple structure enables the arc power, the electrode life, and the energy utilization rate to be substantially improved.

Description

technical field [0001] The invention relates to the technical field of a direct current non-transferred arc plasma torch used for heating gas, in particular to an arc plasma torch with a special-shaped arc channel diameter. [0002] Background technique [0003] Arc plasma torches are the most commonly used heaters for raising gas temperatures above 3000K. DC arc plasma torch is divided into two basic forms: transferred arc and non-transferred arc: when the anode and cathode of the arc are not on the same plasma torch body, it is a transferred arc plasma torch; when the anode and cathode of the arc are located on the same When the plasma torch is on the body, it is a non-transferred arc plasma torch. The non-transferred arc plasma torch relies on the arc discharge in the plasma torch to generate plasma jet or high temperature gas jet, and then use it again, such as high temperature spraying, metallurgical heating, material surface treatment, chemical material production, a...

AI Technical Summary

Problems solved by technology

ZL 200910184998.4 discloses an arc plasma torch. By setting a groove spoiler section in front of the nozzle (upstream), the fluctuation range of arc voltage is reduced, the range of working parameters such as gas pressure and arc current is widened, and the thermal efficiency can reach 90%. Judging from the published technical parameters and existing experience, the air arc voltage is around 500V, and it is difficult to obtain higher power

[0009] To sum up, the existing plasma torch still has the problem that it is difficult to simultaneously meet multiple performance requirements such as high arc power, long electrode life, high thermal efficiency and simple structure.

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