DC arc plasma torch with high efficiency, long life and wide power range

Abstract

A DC arc plasma torch with high efficiency, long life and wide power range comprises a gas distributor, an integrated electrode, an electromagnetic coil and a plasma torch shell. The integrated electrode, the electromagnetic coil and the plasma torch shell are arranged in a sleeving manner in turn from inside to outside. The gas distributor is arranged at the head of the plasma torch shell, and anexternal ionizing medium gas is sprayed tangentially into the inner cavity of the integrated electrode and forms a spiral airflow in the inner cavity after passing through the gas distributor. The anode and the cathode of the integrated electrode are separated by an insulator, an arc is generated between the anode and the cathode, and the arc breaks down the spiral airflow to form an arc plasma jet. The positive pole of an external power supply is connected with the winding head end of the electromagnetic coil. The winding tail end of the electromagnetic coil is connected with the anode. Thecathode is connected with the negative pole of the external power supply and grounded. The problems of low heat conversion efficiency and short electrode life caused by the mismatch between the magnetic field and the plasma parameters during wide-range power regulation of the DC arc plasma torch are solved.

Description

technical field [0001] The invention relates to a DC arc plasma torch with high efficiency, long life and wide power range, especially a plasma torch with the characteristics of high temperature, high enthalpy, highly concentrated energy, high energy conversion efficiency and long working life. Background technique [0002] At present, the main factors affecting the engineering application, working life and maintenance cost of high-power plasma torches are narrow power adjustment range, poor site adaptability, complex control adjustment and electrode ablation, while restricting the core of power adjustment range, electrode life and working reliability The problem is the magnetic field design, power and magnetic field matching, structural design, and system parameter adjustment of the plasma torch. Existing plasma torches do not have magnetic field constraints, or the power and magnetic field are designed and adjusted independently, resulting in complex system structure, comp...

AI Technical Summary

Problems solved by technology

[0003] The technical problem of the present invention is: to overcome the deficiencies of the prior art, and propose a DC arc plasma torch with high efficiency, long life and wide power range, which solves the problem of magnetic field and plasma when the current DC arc plasma torch realizes wide-range power adjustment. The problem of low heat conversion efficiency and short electrode life caused by the mismatch of bulk parameters

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