A curved flange L type TIG welding gun for narrow gap welding of thick wall pipe

CN122400723APending Publication Date: 2026-07-17HARBIN INST OF TECH
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Patent Information

Application Number
CN202610450605.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing welding equipment suffers from insufficient heat dissipation, limited gas protection, structural and accessibility limitations, and poor adaptability of the wire feeding system when welding HT700 high-temperature alloys, resulting in insufficient welding quality and inadequate stability of automated welding.

Method used

A bent flange L-type TIG welding torch was designed, which adopts an L-shaped bending structure, water-cooled conductive copper pipe and quick-connect connector, ceramic protective cover, flow check valve, etc. to achieve efficient cooling and uniform gas protection, adapt to deep and narrow bevels, and connect with external automated equipment with high rigidity.

Benefits of technology

It achieves efficient cooling and gas protection for HT700 high-temperature alloys, ensuring welding quality and stability of automated welding, preventing oxidation and nitriding, and adapting to the accessibility of deep and narrow bevels and the precision of wire feeding.

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Abstract

本发明公开了一种用于大厚壁管道窄间隙焊接的弯法兰L型TIG焊枪，属于焊接制造技术领域。该焊枪包括枪身主体、焊枪头部和焊枪杆；其核心是通过L型折弯的法兰‑枪身过渡连接座使焊枪整体呈L型，以适配深窄坡口；钨电极经水冷导电铜管内的基座通过过盈配合与银钎焊双重固定，该基座内置冷却孔实现对电极的直接冷却，构成“第一重冷却”；U型冷却水管沿枪身布置，与法兰端冷却结构共同形成“三重串联水冷”系统，有效控制道间温度；气体引导管对称布置，其出气小孔与焊枪头部内的镇静室相连，使保护气体经陶瓷保护罩形成均匀层流，实现供气保护。本发明解决了HT700合金焊接时散热难、易氧化、窄坡口可达性差的问题，实现了高质量焊接。
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Citation Information

Patent Citations

  • A narrow gap welding gun

    CN112025050B