Welding device for lower end plug of guide pipe of pressurized water reactor nuclear power fuel assembly

Abstract

The invention relates to the manufacturing technical field of pressurized water reactor nuclear power fuel assemblies, and particularly discloses a welding device for a lower end plug of a guide pipe of a pressurized water reactor nuclear power fuel assembly. According to the device, a welding gun regulating mechanism is arranged in a cavity at the upper end of a welding chamber, and can regulate an electrode of a welding gun; the side wall of the welding chamber is provided with an optical projection imaging system, and the inside of the welding chamber can be observed through a sight glass; an end plug driven mechanism and a clamping mechanism are respectively arranged in two opposite side wall cavities of the welding chamber; a head end plug of a guide pipe weldment is pressed against the driven mechanism and is tightly clamped by the clamping mechanism; and the clamping mechanism, the driven mechanism and the guide pipe weldment are driven to rotate together by a rotating mechanism, and a weld seam of the end plug of the guide pipe weldment is welded. According to the device, the welding gun is designed in a split way, and a tungsten electrode is quickly replaced; the optical projection imaging system is additionally arranged on the welding chamber, and the tungsten electrode is quickly and accurately positioned; and the guide pipe weldment can be automatically controlled to be clamped, rotated and welded, the requirement of a welding process is met, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of pressurized water reactor nuclear power fuel assembly manufacturing, and in particular relates to a welding device for a lower end plug of a guide pipe of a pressurized water reactor nuclear power fuel assembly. Background technique [0002] The PWR nuclear power fuel assembly is composed of fuel rods and fuel assembly framework, and the fuel assembly framework is composed of upper and lower tube sockets, spacer grids, guide tube parts and instrumentation tubes. The guide tube is a zirconium alloy special-shaped thin-walled reducer tube. In order to connect with the upper and lower pipe sockets, the upper and lower ends of the guide tube need to be welded with a sleeve with internal threads and a lower end plug to form a guide tube component. The guide tube and Sleeves can also be joined by other mechanical methods. [0003] At present, the welding methods for the lower end plug of the AFA3G fuel assembl...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a welding device for the lower end plug of the guide tube of the PWR nuclear power fuel assembly, which can solve the welding problem of the lower end

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