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New welding process method for connecting joints between branch pipe and main pipe of steel structure in ocean engineering

A technology for connecting nodes and welding processes, applied in welding equipment, welding accessories, manufacturing tools, etc., can solve the problems of high labor intensity and low welding efficiency, and achieve the effect of reducing labor intensity, improving welding efficiency and reducing welding cost.

Inactive Publication Date: 2020-10-30
OFFSHORE OIL ENG QINGDAO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problems of low welding efficiency and high labor intensity in the new welding process of the connection node between the branch pipe of the steel structure of the ocean engineering and the main pipe, and provides a connection between the branch pipe of the steel structure of the ocean engineering and the main pipe. New Welding Process Method for Nodes

Method used

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  • New welding process method for connecting joints between branch pipe and main pipe of steel structure in ocean engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] The joint angle between the branch pipe of the offshore engineering steel structure and the main pipe to be welded is 50°, the maximum dihedral angle of this node is 130°, and the minimum dihedral angle is 50°, involving three areas B, C, and D . In this case, the saddle mouth CNC cutting machine is used to blank and groove the branch pipe steel pipe, so that each area of ​​the joint (position B, C, D) meets the technical requirements of the preset group as follows:

[0106] Area B: When the dihedral angle of the connecting node between the branch pipe and the main pipe is greater than or equal to 90° and less than 130°, the bevel angle of the joint joint between the branch pipe and the main pipe is 45°, and the gap between the joints is 2 mm to 6 mm , the blunt edge is 0mm~2mm;

[0107] Area C: When the dihedral angle of the connecting node between the branch pipe and the main pipe is greater than or equal to 75° and less than 90°, the bevel angle of the joint between...

Embodiment 2

[0138] The branch angle of the joint between the branch pipe of the offshore engineering steel structure and the main pipe to be welded is 35°, the maximum dihedral angle of the joint is 145°, and the minimum dihedral angle is 35°, involving A, B, C, D, E, F three areas. . In this case, the saddle mouth CNC cutting machine is used to blank and groove the branch pipe steel pipe, so that each area of ​​the joint (position B, C, D) meets the technical requirements of the preset group as follows:

[0139] Area A: When the dihedral angle of the connecting node between the branch pipe and the main pipe is greater than or equal to 135° and less than 145°, the bevel angle of the joint joint between the branch pipe and the main pipe is 45°, and the gap between the joints is 2 mm to 6 mm , no blunt edge requirement;

[0140] Area B: When the dihedral angle of the connecting node between the branch pipe and the main pipe is greater than or equal to 90° and less than 135°, the bevel ang...

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Abstract

The invention discloses a new welding process method for connecting joints between a branch pipe and a main pipe of a steel structure in ocean engineering. The new welding process method includes thefollowing steps that blanking and assembling are conducted, blanking and groove machining are conducted on the branch pipe, connecting joint ends between the branch pipe and the main pipe are assembled, and the groove angle, the assembly gap and truncated edges of the connecting joint ends between the branch pipe and the main pipe meet preset assembly technical requirements; bottom sealing weldingis conducted, and metal powder cored wires are adopted for semi-automatic gas shielded welding; filling welding is conducted, and flux-cored wires are adopted for semi-automatic gas shielded welding;and covering welding is conducted, and the flux-cored wires are adopted for semi-automatic gas shielded welding. Semi-automatic gas shielded welding is adopted in the welding process, the welding wire only needs to be replaced once, the welding steps are greatly simplified, the problems of constantly changing welding equipment and welding rods are avoided, the labor intensity of welding is reduced, the welding efficiency is improved, and thus the welding cost of the steel structure joints is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of welding technology, and in particular relates to a new welding technology method for connecting nodes of branch pipes and main pipes of marine engineering steel structures. Background technique [0002] Marine engineering refers to new construction, reconstruction and expansion projects aimed at the development, utilization, protection and restoration of marine resources, and the main body of the project is located on the seaward side of the coastline. The offshore platform is an important offshore engineering structure with a steel structure as the main body for drilling and oil extraction operations on the ocean. The classification of offshore platforms is generally divided into drilling, production and oil production, storage, processing, residence, or some combination of several of them according to their purposes. Except for some of their structures, they have the structure of general ships, and thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/28B23K9/32
CPCB23K9/164B23K9/235B23K9/28B23K9/32
Inventor 田雷朱大喜程晋宜吕增蔡新荣靳伟亮温志刚陈哲颜克柯杨建张剑利贺龙威
Owner OFFSHORE OIL ENG QINGDAO
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