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Mechanical welding method for closely-spaced pipe joint of header

A technology of mechanical welding and close-packed tubes, which is applied to welding equipment, arc welding equipment, and the edge of workpieces, etc., can solve problems such as high work intensity, low production efficiency, and unstable welding quality, and achieve reduced labor intensity and high production efficiency. The effect of improving and stabilizing welding quality

Inactive Publication Date: 2020-04-17
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of unstable welding quality, high work intensity and low production efficiency during manual welding of existing header densely packed pipe joints, the present invention further proposes a mechanical welding method for header densely packed pipe joints

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  • Mechanical welding method for closely-spaced pipe joint of header
  • Mechanical welding method for closely-spaced pipe joint of header
  • Mechanical welding method for closely-spaced pipe joint of header

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specific Embodiment approach 1

[0017] Specific implementation mode one: combine Figure 1 to Figure 3 To illustrate this embodiment, a mechanical welding method for header close-packed pipe joints described in this embodiment includes the following steps:

[0018] Step 1: Assembling and positioning: first, install the closely-packed pipe joints 1 to be welded on the pipe holes of the header 2 body, and then use electrode arc welding or solid wire gas shielded welding to weld the closely-packed pipe joints to be welded 1 for positioning welding;

[0019] Step 2: Selection of equipment process: CNC automatic welding equipment is selected as the welding equipment, and the welding process adopts solid wire melting electrode gas shielded welding. The welding shielding gas is a mixture of argon and carbon dioxide, and the gas ratio of argon and carbon dioxide is determined by the user. The welding material is determined;

[0020] Step 3: Equipment clamping: according to the outer diameter and height of the pipe...

specific Embodiment approach 2

[0034] Specific implementation mode two: combination Figure 1 to Figure 3 To illustrate this embodiment, in step one of this embodiment, the welding method during tack welding is spot welding, the number of welding points is 2-3 points, and the welding points are arranged symmetrically about the center. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

specific Embodiment approach 3

[0035] Specific implementation mode three: combination Figure 1 to Figure 3 To illustrate this embodiment, in step 2 of this embodiment, in the mixed gas of argon and carbon dioxide, the proportion of argon is 80%-95%, and the proportion of carbon dioxide is 5%-20%. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

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Abstract

The invention discloses a mechanical welding method for a closely-spaced pipe joint of a header, and relates to the technical field of welding. The problems of unstable welding quality, large operation intensity and low production efficiency at the time of manual welding of an existing header closely-spaced pipe joint are solved. The mechanical welding method includes the steps of assembly positioning, selection of equipment technology, equipment clamping, parameter setting and welding. The mechanical welding method is used for welding the closely-spaced pipe joint of the header.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a mechanical welding method for densely packed pipe joints of headers. Background technique [0002] The header is an important pressure component of the power plant boiler, which plays the role of collecting and distributing the working medium, and is the inlet and outlet of steam and water circulation. There are a large number of close-packed pipe joints with a diameter of less than 101.6mm on the body of the header, which are used for welding the header and the water wall, superheater and reheater. , the number of pipe joints reached 28,000. [0003] At present, domestic power plant boiler products, the structural form of the close-packed pipe joints in the header parts, the distance between adjacent pipe joints is small, the length of the pipe joints varies greatly and the space bending angle is large, and the welding process method is electrode arc welding or flux-cored we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K33/00
CPCB23K9/0026B23K9/173B23K33/004
Inventor 徐祥久黄超李秋石杨博刘海国志辉
Owner HARBIN BOILER
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