A rotary tig welding torch for welding and repairing the inner wall of very small diameter pipes

Abstract

The invention provides a rotary TIG welding torch for welding and repairing the inner wall of a very small diameter pipe, which comprises a tungsten electrode conductive rod, a long straight conductive shaft and a rotary drive device; the long straight conductive shaft is provided with a first gas channel and a water cooling channel; The polar conductive rod is provided with a second gas channel and an air outlet; the long straight conductive shaft is connected with the tungsten electrode conductive rod, and the first gas channel is connected with the second gas channel; the long straight conductive shaft is connected with an external power supply; One end of the rod is provided with an air-water distribution structure for connecting the external air supply device and the external water cooling device; the tungsten electrode conductive rod is provided with a tungsten electrode; Drive the tungsten electrode on the tungsten electrode conductive rod to rotate. The welding torch can effectively reduce the diameter of the welding operation part, so that it can enter into the extremely small diameter pipe fittings for welding operation, meet the welding requirements in extremely harsh conditions of the welding space, and can obtain high-quality weld formation.

Description

technical field [0001] The invention relates to the technical field of TIG welding, and more particularly, to a rotary TIG welding torch used for welding and repairing the inner wall of an extremely small diameter pipe. Background technique [0002] In the field of welding, TIG welding can achieve high-quality and high-reliability welding, especially in important components in the nuclear power, aviation and aerospace industries, such as pressure vessels, turbine rotors, heat exchanger condenser tubes, etc. Achieve welding quality that cannot be achieved by other welding methods. [0003] At present, there are various equipments in nuclear power projects and petrochemical projects that need to be welded and repaired on the inner wall of pipe fittings. It is easier to weld the outer wall of the pipe fitting or the inner wall of the pipe with a larger diameter, but when the outer wall of the pipe fitting is not allowed to be welded in the corresponding equipment space, and wh...

AI Technical Summary

Problems solved by technology

In the traditional rotary tungsten electrode TIG welding, its rotary driving device is closely connected with the tungsten electrode. Although the tungsten electrode can achieve stable rotational movement, the overall structure is too large to enter the inside of the ultra-fine pipe for welding; when TIG welding , requires water-cooled gas supply protection, and due to space limitations inside the small-diameter pipe fittings, it is impossible to directly place the water-cooled gas supply device. Among them, the Chinese utility model patent "A TIG Welding Torch for Deep Hole Welding of Pipe Fittings" (Notice No.: CN211360992U) In the patent, only the ventilation pipe is installed under the welding torch through the tightening bolts, which not only occupies a small internal space of the pipe fittings, but also does not provide a water cooling solution

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