A pressure-resistant welding method for pressure vessel ring seam

Abstract

The invention discloses a pressure-resisting welding method for a circular seam of a pressure container. The pressure-resisting welding method includes the following steps that firstly, a pressure container cylinder is assembled on a supporting rotating frame, insertion connection openings are formed in the end faces of the two sides of the pressure container cylinder in a hitting manner, and an edge milling machine is used for conducting grooving on the outer side of a sealing head of the pressure container and the outer side of the pressure container cylinder; secondly, the sealing head of the pressure container is inserted into the tail end of the pressure container cylinder, a pressure device is applied to the tail end of the sealing head of the pressure container, and positioning welding is conducted on the circular seam; thirdly, a double-wire submerged arc welding machine is arranged at the upper portion of the pressure container, a gas shield welding machine is arranged at theinner bottom of the pressure container, a rotating frame begins to rotate after preheating, and welding is conducted at the same time; fourthly, a pressure container connecting pipe and the pressure container cylinder are assembled and welded; and fifthly, stress-relief annealing is conducted, all-directional detection is conducted on the weld seam, and the interior and exterior surfaces of the pressure container are treated.

Description

technical field [0001] The invention belongs to the technical field of industrial manufacturing, and in particular relates to a pressure-resistant welding method for annular seams of pressure vessels. Background technique [0002] Circular seam welding is the welding of various circular and circular welds, and the weld formed by welding is a closed circular ring. Circumferential welds are divided into the following categories: 1. Vertical circular seam: The weld is all-position welding with the main vertical seam, for example; the welding of the fixed port of the horizontal pipe belongs to the vertical circular seam. Of course, the weld seam of the rotatable weld seam of the horizontal pipeline also belongs to the vertical circular seam. 2. Horizontal circular seam: the weld is all-position welding of the transverse seam, such as; the welding of the vertical pipe weld is the horizontal circular seam. The welding that belongs to the horizontal girth seam also includes butt ...

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Problems solved by technology

[0003] In the welding process of the pressure vessel weld, the vertical girth weld of the product head is very important to the pressure vessel. At present, in the prior art, the manual welding method is generally used in the welding process of the girth seam. Without the help of related auxiliary welding equipment, not only the production efficiency is low, the labor intensity of the workers is high, but also the welding quality of the weld is difficult to guarantee, many welding defects appear, the number of weld repairs increases, the welding efficiency is low, and the production is inconvenient

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