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Novel underwater submerged arc welding device and welding method

A submerged arc welding, a new technology, applied in the direction of welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of obvious quenching effect of weld seam, reduce the mechanical properties of welded joints, etc., and achieve suitable for large-scale promotion and application, low cost, The effect of improving mechanical properties

Active Publication Date: 2019-07-26
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During underwater wet welding, the workpiece to be welded is directly in the water, and the quenching effect of the water on the weld is obvious, and it is easy to produce a hardened structure with high hardness, which greatly reduces the mechanical properties of the welded joint

Method used

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  • Novel underwater submerged arc welding device and welding method
  • Novel underwater submerged arc welding device and welding method
  • Novel underwater submerged arc welding device and welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A new type of underwater submerged arc welding device, including a solder box and a sleeve. Solder is provided in the solder box. A solder delivery pipe is provided at the bottom of the solder box. One end of the solder delivery pipe is connected to the sleeve, and the other end of the solder delivery pipe is provided with a step There is an auger inside the feeder motor and the solder conveying pipe, and the auger is connected with the stepping motor; the top of the sleeve is connected with the gun barrel of the welding torch, and the lower part of the welding torch is annularly nested inside the sleeve. By adjusting the rotation speed of the stepping motor, the control of the solder conveying speed can be realized, and the purpose of controlling the solder coverage thickness of the welding zone can be further achieved.

[0030] The solder is a viscous liquid water-resistant solder, and its components include HJ350 submerged arc flux and epoxy resin with a weight ratio ...

Embodiment 2

[0033] A new type of underwater submerged arc welding device, its structure is as described in Example 1, the difference is that in order to prevent the solder box from entering water, a cover is provided on the top of the solder box, and a rubber ring is provided between the cover and the solder box . The stepper motor is also waterproofed and sealed.

Embodiment 3

[0035] A new type of underwater submerged arc welding device, its structure is as described in Embodiment 1, the difference is that the gun barrel of the welding torch is fixedly connected with the solder box through the connecting plate.

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Abstract

The invention relates to a novel underwater submerged arc welding device and a welding method and belongs to the technical field of underwater submerged arc welding. The device comprises a solder boxand a sleeve; the solder box is internally provided with a solder which is a viscous liquid water-resistant solder; the bottom of the solder box is provided with a solder conveying pipe; one end of the solder conveying pipe is connected with the sleeve, and the other end of the solder conveying pipe is provided with a stepping motor; the solder conveying pipe is internally provided with a screw; the screw is connected with the stepping motor; the top end of the sleeve is connected with a welding gun barrel; and the lower part of the welding gun is annularly nested in the sleeve. For the novelunderwater submerged arc welding device, by adjusting a rotating speed of the stepping motor, control of a solder conveying speed can be realized, the purpose of controlling a solder coverage thickness of a welding area is further achieved, welding seam formation is effectively improved, a welding seam cooling speed is lowered, the microstructure of a welding joint is improved, and the mechanicalproperty of the welding joint is effectively improved.

Description

technical field [0001] The invention relates to a novel underwater submerged arc welding device and a welding method, belonging to the technical field of underwater welding. Background technique [0002] With the continuous development of marine engineering and the increasing demand for marine resource exploitation, underwater wet welding technology has been widely used in the construction of offshore oil and gas platforms and the laying and construction of submarine oil pipelines due to its advantages of flexible operation and low cost. In maintenance. However, since the surrounding area of ​​underwater wet welding is not air but water, the two media have different physical and chemical properties, which brings a series of adverse effects to underwater welding. The main manifestations are as follows: (1) The hydrogen content of the weld is high. In the process of underwater wet welding, the underwater arc will cause the thermal decomposition of the surrounding water, resu...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K9/32
CPCB23K9/18B23K9/32
Inventor 贾传宝董胜法韩焱飞武传松
Owner SHANDONG UNIV
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