Welding and Repairing Method for the Outer Cylinder of the Preheating Boiler

Abstract

The invention relates to the technical field of boiler welding repair, in particular to a welding repair method for preheating the outer cylinder of a boiler, which includes the following steps: determining the position of the defect, cleaning around the defect, and determining the welding repair area according to the shape and size of the defect, Mark the repaired welding area; heat the marked area, the size of the heated area is centered on the repaired welding area plus an area of ​​10~15mm; tap the marked area in a red hot state to make the marked area concave on the surface of the cylinder; according to the dent According to the size of the area, the corresponding repair plate is embedded in the recessed area, and the repair plate is welded in the recessed area; the weld is smoothed; the weld area of ​​the outer cylinder of the boiler is inspected, and the hydraulic test is carried out after the inspection is free of defects. The invention solves the problems in the prior art that when welding repairs to the corrosion points of the outer cylinder of the boiler, directly adding a repair plate welding is likely to cause welding leaks, poor welding, welding penetration and other consequences at the welding place, and even cause larger defects, and the welding effect is good. ,efficient.

Description

Technical field [0001] The present invention relates to the field of boiler welding restoration, and more particularly to a preheating boiler outer cylinder welding method. Background technique [0002] The preheating boiler is the components of the internal combustion vehicle, which is used for long-term use. In terms of high temperature conditions, the inner wall corrosion is often caused, resulting in a test leak without being used, and it is necessary to prepare the boiler outer cylinder. [0003] The traditional welding method is to dig up the base material of the corrosion and then inlaid the same size and material for welding, but for corrosion points, some corrosion points and adjacent local wall thickness are very thin and from the outside of the barrel. It is observed that, for example, the thickness of the wall thickness of the wall thickness of 2.5 mm is observed, and the thickness of some parts of the partial wall thickness is between 0 to 1 mm under the action of co...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that directly adding patch welding to the corrosion spots of the boiler outer cylinder will easily lead to weld leakage, poor welding, weld penetration and other consequences, and even cause larger defects, the present invention provides a A Welding Repair Method for the Outer Cylinder of a Preheating Boiler

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