Research on the Application of Robotic Narrow Gap Welding Technology for the Valve Shaft of Large-scale Pumped Storage Units' Ball Valves

LIU Qiang; JIN Bao; FENG Tao; YIN Xiang; PENG Xieyi

doi:10.7512/j.issn.1001-2303.2025.05.10

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Research on the Application of Robotic Narrow Gap Welding Technology for the Valve Shaft of Large-scale Pumped Storage Units' Ball Valves
Vol. 55, Issue 5, Pages: 77-81(2025)
Received：25 September 2024，

Revised：2025-05-06，

Published：20 May 2025
DOI： 10.7512/j.issn.1001-2303.2025.05.10
稿件说明：

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刘强，金宝，冯涛，等.大型抽水蓄能机组球阀活门阀轴的机器人窄间隙焊接技术应用研究［J］.电焊机，2025，55（5）：77-81. DOI： 10.7512/j.issn.1001-2303.2025.05.10.

LIU Qiang, JIN Bao, FENG Tao, et al.Research on the Application of Robotic Narrow Gap Welding Technology for the Valve Shaft of Large-scale Pumped Storage Units' Ball Valves[J].Electric Welding Machine, 2025, 55(5): 77-81. DOI： 10.7512/j.issn.1001-2303.2025.05.10.

摘要

随着抽水蓄能机组单机容量的不断增大，高水头大型球阀活门阀轴的制造难度越来越大，质量要求也越来越严格。为实现大型抽水蓄能球阀活门的机器人焊接，降低人工劳动强度，对活门阀轴焊接结构进行了创新设计，将常规的双面X型坡口设计为窄间隙I型坡口+人工坡口X型坡口，通过窄间隙焊枪设计及工艺试验，并集成机器人窄间隙焊接系统，开发出了一套成熟的机器人窄间隙MAG焊接与人工焊接相结合的焊接工艺，成功应用于大型球阀活门阀轴的焊接，提高了活门阀轴的焊接效率及质量可靠性，降低了劳动强度。焊接总量减少70.6%，焊接效率提高了5倍，焊接质量完全满足要求，避免了超厚板的焊后返修。

Abstract

With the continuous increase in the single unit capacity of pumped storage units

the manufacturing difficulty of high-head large-scale ball valve valve shafts is increasing

and the quality requirements are becoming more stringent. To achieve robotic welding of large-scale pumped storage ball valves and reduce manual labor intensity

an innovative design of the valve shaft welding structure was carried out

transforming the conventional double-sided X-groove design into a narrow gap I-groove + artificial X-groove. Through the design of narrow gap welding torches and process tests

and the integration of robotic narrow gap welding systems

a mature set of robotic narrow gap MAG welding combined with manual welding technology was developed. It has been successfully applied to the welding of large-scale ball valve valve shafts

enhancing the welding efficiency and quality reliability of the valve shaft and reducing labor intensity. The total welding amount decreased by 70.6%

welding efficiency increased fivefold

and the welding quality fully met the requirements

eliminating the need for post-welding repair of over-thick plates.

关键词

Keywords

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