Welding method of variable manifold for locomotive

A welding method and technology of connecting pipes, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of poor flange sealing effect, large flange deformation, long heating time, etc., to reduce the risk of leakage, Avoid the influence of the sealing effect, the effect of short operation time

Inactive Publication Date: 2013-02-13
CRRC DALIAN CO LTD
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Problems solved by technology

Due to the long heating time of TIG welding, the deformation of the flange is large, which leads to the deterioration of the sealing effect of the flange, resulting in the hidden danger of leakage during use

Method used

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  • Welding method of variable manifold for locomotive
  • Welding method of variable manifold for locomotive
  • Welding method of variable manifold for locomotive

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Experimental program
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Embodiment Construction

[0026] Embodiment 1 of the present invention first aims at the problem of deformation of the flange caused by the corner joint TIG welding of the pipe and the flange in the prior art, and the connection between the end of the pipe inserted into the flange part on the variable joint pipe and the inner wall of the flange place, such as figure 2 The welding method of the first corner joint 100' shown is improved, and the first corner joint 100 is welded by a first gas shielded welding method, and the first gas shielded welding method uses a solid welding wire and an argon-rich gas.

[0027] Specifically, the welding material of the first gas-shielded welding method can be selected according to the following examples: the welding wire is, for example, a solid welding wire with a grade of ER50-6, and the shielding gas is, for example, made of 80% argon Ar and 20% carbon dioxide CO 2 The formed gas, the welding torch can adopt the welding torch with wire feeding tube, and welding w...

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Abstract

The invention provides a welding method of a variable manifold for a locomotive, which comprises the following step: welding an upper tube of the variable manifold and a first fillet seam of a flange by adopting a first gas shielded welding method, wherein the first gas shielded welding method adopts a solid welding wire and argon-rich gas. The welding method of the variable manifold for the locomotive, provided by the invention, has the benefit that as the upper tube of the variable manifold and the first fillet seam of the flange are welded by adopting the first gas shielded welding method, and the first gas shielded welding method is high in efficiency and short in operation time, the problem of flange deformation caused by the conventional welding method can be solved, so that the effect on the sealing effect of the flange is avoided, and the risk of leakage at the connection of the tube and the flange in the use process is reduced.

Description

technical field [0001] The invention relates to welding technology, in particular to a welding method for a variable joint pipe of a locomotive. Background technique [0002] The main transformer is a key component of a high-power electric locomotive, and the transformer tube, as a cooling oil supply pipeline on the main transformer, is directly related to the normal operation of the main transformer. The variable joint pipe is generally welded by multiple flanges, bent pipes, and straight pipes. figure 1 It is a structural schematic diagram of the variable coupling tube in the prior art, such as figure 1 As shown, the variable coupling pipe is mainly composed of pipes (including straight pipe 1, bent pipe 2) and flange 3. The parts are connected by welding. The weld between pipes is a ring seam. The welds connecting the flanges are fillet seams. Such as figure 1 As shown, the number of welded joints of transformer tubes is large, and the positions and types of welds are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/173B23K35/38
Inventor 李亓李元达朱军
Owner CRRC DALIAN CO LTD
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