Method for controlling welding deformation between seal head and skirt transition section

Abstract

The invention provides a method for controlling welding deformation between a seal head and a skirt transition section. The method includes welding a processing pad above a position, used for assembling the skirt transition section according to design, of the outer wall of the seal head; welding the skirt transition section at the bottom of the processing pad, and performing bead weld between the inner side surface of the skirt transition section and the seal head; removing the processing pad; and performing girth welding on the seal head and a barrel, and performing bead weld between the upper surface of the skirt transition section and the seal head. The method overcomes defects of the prior art; the welding deformation between the seal head and the skirt transition section can be effectively controlled; welding quality is guaranteed while welding materials are saved; and meanwhile, miss-match of welding joints can be guaranteed during assembling of the seal head and the barrel, and product quality is greatly improved.

Description

technical field [0001] The invention relates to a method for controlling welding deformation between a head and a skirt transition section, and belongs to the technical field of pressure vessel fixing methods in tower equipment. Background technique [0002] At present, for tower equipment in chemical equipment, it is very common to use a skirt structure to fix the pressure vessel. For example: converter, filter, etc. During the manufacturing process, the transition section in the skirt is directly connected to the head, and this structural form directly affects the manufacturing process and welding quality of the head. [0003] The connection structure between the traditional skirt transition section and the head is as follows: figure 1 As shown, a boss 2 is surfacing directly at the position of the skirt transition section assembled on the outer wall of the head 1, and the inner and outer diameters and grooves of the boss 2 are machined out, and then welded to the skirt ...

AI Technical Summary

Problems solved by technology

Moreover, due to the limitations of many factors such as welding conditions and machining after surfacing, surfacing welding can only be carried out before the head and cylinder are assembled, which leads to welding deformation at the open end of the head after surfacing, which affects The ellipticity of the opening end of the head leads to an out-of-tolerance amount of misalignment of the circular seam when assembling with the cylinder

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