Research and Development of Special Automatic Welding Equipment for CV Penetration Insert Plates in AP Nuclear Power Plants

LI Zhuyuan; WANG Shipei; TANG Hao; WU Yehua; QU Hanwei; YAO Shuyang; TANG Chunyun; WANG Jinming; ZHAO Zedong; WANG Xiaona; XU Songhui

doi:10.7512/j.issn.1001-2303.2026.04.15

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Research and Development of Special Automatic Welding Equipment for CV Penetration Insert Plates in AP Nuclear Power Plants
Vol. 56, Issue 4, Pages: 119-127(2026)
Received：29 January 2026，

Revised：2026-02-24，

Published：20 April 2026
DOI： 10.7512/j.issn.1001-2303.2026.04.15
稿件说明：

移动端阅览

李竹渊，王世培，汤昊，等.AP堆型核电站CV贯穿件插入板专用自动焊接装备研发［J］.电焊机，2026，56（4）：119-127. DOI： 10.7512/j.issn.1001-2303.2026.04.15.

LI Zhuyuan, WANG Shipei, TANG Hao, et al.Research and Development of Special Automatic Welding Equipment for CV Penetration Insert Plates in AP Nuclear Power Plants[J].Electric Welding Machine, 2026, 56(4): 119-127. DOI： 10.7512/j.issn.1001-2303.2026.04.15.

摘要

AP堆型核电站安全壳（CV）贯穿件插入板为核级厚板结构，其焊接质量直接决定第三道安全屏障的密封性与结构完整性。目前国内施工普遍采用焊条电弧焊，存在劳动强度大、质量一致性差、对高技能焊工依赖度高等问题，严重制约核电建造效率与质量稳定性。为解决上述工程痛点，研制了一套AP堆型CV贯穿件插入板专用自动化焊接装备。该装备以四轴联动焊接小车为核心执行机构，集成一体化涨紧定位机构、弧压自动跟踪系统及熔池远程监控系统，创新设计三档式离合器与180°可翻转监控相机，实现快速装夹、精准定位、全姿态稳定焊接与实时可视化监控。针对焊枪晃动问题，将原光轴铜套传动优化为直线导轨传动，使焊枪末端间隙控制在1 mm以内。采用 SA-738Gr.B 核级钢开展模拟件焊接验证，结果表明，装备运行平稳，焊枪末端晃动间隙≤1 mm，焊接效率较手工焊提升1倍以上。模拟件焊接验证表明，焊缝无损检测及理化性能均满足ASME标准，核心部件100%国产化，填补国内技术空白，为核电焊接提供高效可靠的自动化解决方案。

Abstract

The penetration insert plate of the containment vessel (CV) in AP nuclear power plants is a nuclear-grade thick plate structure

whose welding quality directly determines the sealing performance and structural integrity of the third safety barrier. At present

manual metal arc welding is widely adopted in domestic construction

which is featured with high labor intensity

poor quality consistency

and high dependence on highly skilled welders

seriously restricting the efficiency and quality stability of nuclear power construction. To solve the above engineering problems

a set of special automatic welding equipment for CV penetration insert plates in AP nuclear power plants was developed. Taking the four-axis linkage welding trolley as the core executing mechanism

the equipment integrates an integrated tensioning positioning mechanism

automatic arc voltage tracking system and remote molten pool monitoring system. The innovative three-speed clutch and 180° reversible monitoring camera are designed to realize rapid clamping

precise positioning

full-attitude stable welding and real-time visual monitoring. Aiming at the problem of welding torch shaking

the original optical axis copper sleeve transmission was optimized into linear guide rail transmission

so that the shaking clearance of the welding torch end is controlled within 1 mm. The simulation test was carried out with SA-738Gr.B nuclear-grade steel. The results show that the equipment runs stably with the shaking clearance of the welding torch end ≤ 1 mm

and the welding efficiency is more than doubled compared with manual welding. The simulation welding verification proves that the non-destructive testing and physical and chemical properties of the welds meet the ASME standards. The core components are 100% domestic

which fills the domestic technical gap and provides an efficient and reliable automatic solution for nuclear power welding.

关键词

Keywords

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