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Abstract

A plasma torch excitation device includes an electrode core frame having a chamber; an electrode implanted in the chamber to form a gas collecting conduit surrounding between the electrode and a wall of the chamber; and an electrode housing fixed at a bottom end of the electrode core frame, the electrode housing having a core bore, the inner end of the core bore communicating with the gas collecting conduit, the outer end serving as a blasting port of the plasma torch. The electrode has an electric ion projecting end, the electric ion projecting end is adjacent to the inner end of the core bore, and a conical bore wall is formed between the inner end and the outer end of the core bore, the conical bore wall is formed by the inner end gradually expanding to the outer end. It can solve the conventional problems of well-known plasma torches, such as, limitation of flame temperature and flame length due to shortness of the core bore.

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First Claim