Technological method of partly submerged type platform complex K type node welding
Technical field:
Latent formula type platform complex K node welding is the buoyancy aid carrying K type structure division welding technique of seafari and production platform device.
Background technology:
Semisubmersible platform is the exploration and the quarrying apparatus of deep-sea oil/natural gas resource.Because working environment is extremely abominable, technology and security requirement are high.Platform is by two large-scale buoyancy aids carrying totals and various device, copies large-scale tubular construction between buoyancy aid and supports and link into an integrated entity.Form complex K type node between stay pipe.This structure plays fundamental influence to the security of platform, and welding requirements is high.Do not carry out the welding procedure of similar structures in the past.
Summary of the invention:
The present invention is exactly the soldering reliability problem that solves K type node, and a kind of latent formula type platform complex K node welding is provided.
Of the present invention in order to address the above problem, latent formula type platform complex K node welding method, be with the corresponding placement of three sections tubing of K type node, oblique pipe node circumference passes through mutually with the transverse tube outside, it is characterized in that: oblique pipe bevel for welding adopts the form on varied angle, rust limit in whole one week of intersection joint, open for outer groove and from being up to zero from oblique pipe obtuse angle end to mid point up and down and to reduce gradually, open from oblique pipe acute ends to mid point up and down for inboard groove and from being up to and zeroly reduce gradually; Weld from the about two sides of oblique pipe node circumference, covered-electrode welding (SMAW) is adopted in the welding bottoming, and filling and capping adopt flux-cored wire CO
2Gas shielded arc welding (FCAW).
The present invention compared with the prior art, it is as follows to have advantage: by rationally determining on groove, adapted to the different particularity of each point nature angle on the oblique pipe node circumferential weld, the groove type of gradual change has guaranteed about two sides soldering reliability; Backing welding adopts covered-electrode welding, and suitable gap, has improved the access for welding of thick-walled pipe node, has guaranteed the through welding of the root of weld, fills and capping employing flux-cored wire CO
2Gas shielded arc welding had both adapted to the characteristics of pipe node all-position welding, had improved welding procedure efficient simultaneously.
Description of drawings:
Accompanying drawing has been represented corresponding placement of three sections tubing of a kind of K type node of the present invention and groove type structural representation, wherein Fig. 1 is three sections tubing correspondence positions of K type node structural representation, Fig. 2 is the groove type structural representation, and Fig. 3,4,5 is respectively A, B, C three means of spot welds position views.Example below in conjunction with accompanying drawing further specifies.
The specific embodiment:
This latent formula type platform complex K node welding method of the present invention, be used for the welding of the exploration BINGO 9000 latent formula platform K type nodes of deep-sea oil/natural gas resource, with corresponding place (referring to Fig. 1) of three sections tubing of K type node, 30 degree oblique pipe node circumference pass through mutually with the transverse tube outside.Oblique pipe bevel for welding adopts the form on varied angle, rust limit in whole one week of intersection joint, open for outer groove and from being up to zero from oblique pipe obtuse angle end to mid point up and down and to reduce gradually, open from oblique pipe acute ends to mid point up and down for inboard groove and from being up to and zeroly reduce gradually; As open from oblique pipe obtuse angle end A to last mid point B for outside groove and be reduced to zero gradually from maximum groove, open from oblique pipe acute ends C to last mid point B for inboard groove and from maximum and be reduced to zero gradually.Weld from the about two sides of oblique pipe node circumference, weld whole intersection joint after, just formed as Fig. 6,7,8 welded condition; By rationally determining of each point on groove (referring to Fig. 3,4,5), adapted to the different particularity of each point nature angle on the oblique pipe node circumferential weld, the groove type of gradual change, weld from about two sides, on welding method was determined, covered-electrode welding (SMAW) was adopted in bottoming, and suitable gap, improve the access for welding of thick-walled pipe node, guaranteed the through welding of the root of weld; Fill and capping employing flux-cored wire CO
2Gas shielded arc welding (FCAW) had both adapted to the characteristics of pipe node all-position welding, had improved welding procedure efficient simultaneously.