Water-cooled plasma torch

Abstract

The present invention relates to a water-cooled plasma torch. The water-cooled plasma torch according to the present invention comprises: a body having a gas and air inflow passage and a cooling water inflow and discharge passage, which are formed therein; a first main body comprising a first diameter part, which is formed to protrude from a center portion of the body so as to be connected to the cooling water inflow passage, and a second diameter part, which is formed to protrude from the body so as to be spaced from the first diameter part at an equal distance; a second main body coupled to the first main body at a one-side end portion so as to form first gas passages, which are connected to the gas inflow passage, at the outer sides of the first diameter part and the second diameter part; an electrode coupled to an end portion of the first diameter part; a cooling water tube inserted into the center of the first main body so as to supply cooling water to the electrode; an insulator inserted into and coupled to an end portion of the second main body, having a first cooling water passage formed therein, and having a first air passage provided to be spaced from the first cooling water passage at an equal distance; a third main body coupled to an end portion of the insulator, and having a second cooling water passage formed therein and connected to the first cooling water passage; a pilot terminal grounded to the predetermined position of the third main body by passing through the first main body, the second main body and the insulator; a nozzle of which a one-side center portion is inserted into an end portion of the third main body and the inner peripheral surface of the outer side is coupled to a first screw part formed on the outer peripheral surface of the third main body, and which has a third cooling water passage formed therein and connected to the second cooling water passage; an inner cap coupled to a second screw part, which is formed on the outer peripheral surface of the insulator such that the nozzle is positioned therein, such that a second air passage, which is connected to the first air passage, is formed between the inner peripheral surface of the inner cap and the outer peripheral surface of the nozzle; and an outer cap coupled to the outer side of the inner cap.

Description

technical field [0001] The present invention relates to a water-cooled plasma torch, more specifically, to a torch which has a simple structure and can increase the speed of the high-temperature plasma flame direction at the same time, and can use the nozzle and the electrode for a long time by improving the cooling efficiency, and can A water-cooled plasma torch that applies high voltage. Background technique [0002] The existing plasma cutting method has Japanese Patent Office Patent Publication No. 3-27309, which briefly explains the composition of the plasma torch. An electrode is installed in the center of the plasma torch, and a center for spraying is arranged at the center opposite to the electrode. The ejection port of the plasma arc is equipped with a detachable nozzle on the plasma torch. [0003] The nozzle is fixed by fastening the cap to the plasma torch, and a passage for cooling water is formed between the outer peripheral surface of the nozzle and the inner...

AI Technical Summary

Problems solved by technology

[0011] In order to compress the plasma arc, it is especially necessary to effectively cool the nozzle, especially the periphery of the ejection port for injecting the plasma arc, but as described in the prior art, when the outer peripheral surface of the nozzle and the inner surface of the cover When the cooling water channel is formed between the peripheral surfaces, the channel is formed to the vicinity of the nozzle, but the cooling water supplied by the plasma torch circulates only in the vicinity of the main part (the shortest distance from the supply channel to the drain channel), thereby The flow of cooling water at the front end portion (near the nozzle) stagnates, resulting in insufficient cooling, shortening the life of the nozzle, and requiring frequent replacement of the nozzle by the operator.

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