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TIG welding device for butt joint of LNG pipeline and welding method thereof

A technology of welding device and welding method, which is applied in welding equipment, electrode support device, welding rod characteristics and other directions to achieve the effects of improving deposition efficiency, reducing groove size and improving welding efficiency

Pending Publication Date: 2020-01-31
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a TIG welding device and its welding method for butt jointing of LNG pipelines, which can solve the deficiencies of the existing welding devices and welding methods for LNG pipelines

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  • TIG welding device for butt joint of LNG pipeline and welding method thereof
  • TIG welding device for butt joint of LNG pipeline and welding method thereof
  • TIG welding device for butt joint of LNG pipeline and welding method thereof

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Embodiment Construction

[0028] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.

[0029] Such as Figure 1 to Figure 4 A TIG welding device for butt jointing of LNG pipelines shown includes a circular track 1, a mobile trolley module 2 and a welding module 3; the mobile trolley module 2 is set on the circular track 1, and the welding module 3 is set on the mobile On the trolley module 2 and extends out of the circular track.

[0030] The circular track 1 has a cylindrical structure, and the inner wall at both ends of the circular track 1 is provided with a track groove 11 along the circumferential direction; a number of bolt holes are evenly distributed along the circumferential direction on the circular track 1 and the bolt holes The axis passes through the axis of the ring track 1; a pipe locking bolt 12 is arranged in the bolt hole.

[0031] The mob...

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Abstract

The invention relates to a TIG welding device for butt joint of an LNG pipeline. The TIG welding device is characterized by comprising an annular track, a movable trolley module and a welding module.The movable trolley module is arranged on the annular track, the welding module is arranged on the movable trolley module and stretches out of the annular track. A method of TIG combination of a narrow gap groove and a hot wire reduces the dimension of the groove on the one hand, so that the filling quantity is reduced and the welding efficiency is improved greatly. On the other hand, filled withthe hot wire, compared with common TIG, the deposition efficiency can be improved by two times. The efficiency of the welding method is improved greatly, the labor of a worker is alleviated and the working condition is improved. A welding trolley drives a welding, welding stick heating and automatic wire feeding mechanism to move circumferentially around the pipeline along the track under a circumstance that the pipeline is fixed relatively. In the whole welding process, parameters are only set before start, and the TIG welding device operates full-automatically after welding is started.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a TIG welding device and a welding method for butt jointing of LNG pipelines. Background technique [0002] Pipeline connections have been widely used in many industries, and pipeline joints usually have sealing requirements, so pipe-pipe butt joints are a common form of joints in pipeline connections. For the welding of pipe-pipe butt joints, the ideal state is to use the positioner to rotate the pipe without moving the welding torch, so that the welding positions are all in the flat welding position, and the welding difficulty is the lowest; but many pipes cannot be rotated during on-site construction. We can only rely on welding personnel to use manual welding and semi-automatic welding to carry out operations; often the butt joint of a thick-walled large pipe requires several welders to complete the welding for several days; due to the influence of many human factors and wor...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/235B23K9/28B23K9/00
CPCB23K9/0052B23K9/167B23K9/235B23K9/28
Inventor 赵勇姜雨默严铿许祥平谷家扬蒋志勇
Owner JIANGSU UNIV OF SCI & TECH
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