Welding method for support rack of nuclear reactor evaporator

Abstract

The invention relates to a welding method of a nuclear reactor evaporator supporting stop rack. After magnetic powder inspection and preheating are carried out on grooves processed at the top edge and the bottom edge of an upper-layer longitudinal support plate, the upper-layer longitudinal support plate is assembled correspondingly with a top plate and a middle partition board and is spot welded, and simultaneously is supported between the top plate and the middle partition board through a plurality of surrounding support rod plates; and after heat treatment, grinding wheel grinding and magnetic powder inspection are carried out. Preheating and continuous welding are then carried out to completely weld the grooves. After heat treatment, a plurality of support rods are removed, weld joints are ground by a grinding wheel, and magnetic powder inspection and ultrasonic examination are carried out; other upper-layer longitudinal support plates are sequentially arranged at intervals by repeating the steps and are respectively welded with the top plate and the partition board; and finally furnace entry stress eliminating heat treatment, polishing, magnetic powder inspection and ultrasonic examination are carried out. End head weld joints and middle weld joints are respectively designed between the upper-layer longitudinal support plate and the top plate and between the upper-layer longitudinal support plate and the partition board, so weld joint shrinkage deformation is prevented, the maneuverability of back chipping is strong, and the full penetration welding quality is ensured.

Description

technical field [0001] The present invention relates to a welding method, in particular to a welding method of a support bracket of a nuclear reactor evaporator. Background technique [0002] See also Figure 1 to Figure 4 As shown in the figure, as the support of the evaporator of the primary equipment of the nuclear reactor, the support bracket comprises a horizontally placed bottom plate 1; A frame formed by connecting two shorter second lower longitudinal support plates 3 and two lower horizontal support plates 7; the middle partition plate 6 is horizontally connected to the frame. Wherein, the two lower-layer transverse support plates 7 arranged at intervals are fixedly connected in the middle position between the two first lower-layer longitudinal support plates 2; the ten second lower-layer longitudinal support plates 3 are divided into two parts Groups are arranged at intervals between the two first lower layer longitudinal support plates 2, and are respectively fix...

AI Technical Summary

Problems solved by technology

However, at present, there is a lack of reasonable assembly sequence and reliable welding method, it is difficult to guarantee the quality of the weld at the existing groove 8 position, and it is impossible to effectively control the welding deformation

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