Cathode cooling structure of plasma spraying gun

Abstract

The invention relates to a cathode cooling structure of a plasma spraying gun. The cathode cooling structure is composed of a rear seat, a cathode sleeve and a cathode head, wherein a guide tube is arranged in a rotation body structure of the rear seat, the cathode sleeve is of a hollow rotation body structure, the internal space of the cathode sleeve forms a cooling cavity, the cathode head is embedded into the front end of the cathode sleeve, the front end of the cathode head extends out of the cathode sleeve, the rear end of the cathode head is a conical cooling tail protrusion, the cooling tail protrusion extends into the cooling cavity, the guide tube on the rear seat extends into the cooling cavity of the cathode sleeve, and a water outlet of the guide tube surrounds the cooling tail protrusion at the rear end of the cathode head. The space between the outer wall of the guide tube and a rear seat wall body serves as a water return channel, the internal space of the guide tube serves as a guiding channel, a cooling water input interface is communicated with the guiding channel, the guiding channel is communicated with the water return channel through the surrounding space of the cooling tail protrusion at the rear end of the cathode head. The cathode cooling structure cools the cathode head in a close flushing mode and can quickly carry away heat of the cathode head and enable a cathode not to be easily ablated.

Description

technical field [0001] The invention relates to plasma equipment, in particular to a cathode structure of a plasma torch. Background technique [0002] At present, plasma technology has been widely used, industrially used in plasma ignition, plasma spraying, metal smelting, plasma heating to manufacture nanomaterials, cutting, waste incineration and waste treatment, etc. The plasma treatment method is very different from the general method. Plasma is a state formed under the ionosphere or discharge phenomenon. With the discharge phenomenon, excited atoms, excited molecules, dissociated atoms, free atomic groups, Active chemicals of groups of atoms or molecular ions and their reactions resulting from collisions with other chemicals. In the plasma generator, the discharge effect causes the working gas molecules to lose the outer electrons and form an ion state, which generates high temperature through mutual collision, and the temperature can reach more than tens of thousands...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcoming that the cathode of the existing plasma torch is easily ablated, and to provide a cathode cooling structure of the plasma torch, so that the cathode is not easy to be ablated, so as to prolong the service life of the plasma torch and improve production efficiency. Efficiency and saving production cost

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