Narrow gap and deep groove welding head

Abstract

The invention discloses a narrow gap and deep groove welding head. The welding head comprises a hollow tabular welding head shell main body which is thin and long and is suitable for stretching into a narrow and deep groove gap for welding; the welding head is further provided with double gas protection systems, wherein the position of a secondary gas protection system is adjustable so that the surface of a melting pool can be fully protected and the welding quality is ensured; a protected gas lens is connected outside the air outlets of the double gas protection systems so that protected gas can be stably and evenly sprayed out, the surface of the melting pool is fully protected, and the welding quality is increased; a compulsory water cooling system is arranged, then a tungsten electrode fixing device is compulsorily water-cooled, and cooling water circularly flows so that a tungsten electrode can be fully cooled.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a narrow gap deep groove welding head. Background technique [0002] At present, narrow-gap deep-groove welding machine technology is mainly used in the manufacture of thick-walled products such as nuclear power plants, boilers, and petrochemical containers. The high-standard quality requirements for the manufacture of nuclear power products, especially how to weld pump casing products are technical problems in the industry. According to the manufacturing technical requirements of nuclear power products, the structure and function of existing equipment cannot fully meet the requirements of nuclear power products, especially the welding head is difficult to meet the welding requirements, such as the welding head disclosed in the Chinese patent application number CN201210448162.2 , it is difficult to complete the welding work for workpieces with narrow gaps and deep grooves; the ...

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Problems solved by technology

According to the manufacturing technical requirements of nuclear power products, the structure and function of existing equipment cannot fully meet the requirements of nuclear power products, especially the welding head is difficult to meet the welding requirements, such as the welding head disclosed in the Chinese patent application number CN201210448162.2 , it is difficult to complete the welding work for workpieces with narrow gaps and deep grooves; the welding head disclosed in the Chinese patent with the application number CN201080062360.4 is also difficult to complete the welding work for nuclear power equipment with narrow gaps, and the gas protection of the welding head The ability is still insufficient to ensure the welding safety of nuclear power products. The welding of shell parts of nuclear power products must have a unique shape and structure to penetrate into the gap. At the same time, it also needs strong cooling capacity and sufficient gas protection capacity. and sufficient reliability and stability

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