Device for improving welding quality of large-size pipeline easily

A technology for welding quality and pipelines, which is applied in the direction of welding accessories, welding connection methods, tubular objects, etc., can solve the problems of reducing the service life of pipelines, achieve the effect of tightly protecting gas and improving welding quality

Inactive Publication Date: 2017-06-30
CHENGDU DAMO PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device that is conducive to improving the welding quality of large-scale pipelines, solve most large-scale pipeline welding, and only spray a certain amount of gas around the weldin

Method used

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  • Device for improving welding quality of large-size pipeline easily
  • Device for improving welding quality of large-size pipeline easily

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1-Figure 2 As shown, the present invention is beneficial to the device for improving the welding quality of large-scale pipelines, including a horizontal plate 4, a connecting assembly, a driving assembly, and gas nozzles 1, gas pipelines 2 and gas storage tanks 3 communicated in sequence, and the gas nozzles 1 have several , and arranged in a row on the horizontal plate 4, and the extension lines of the gas jet ends of the gas nozzles 1 meet at one point; the connecting assembly is connected to the end of the horizontal plate 4 away from the gas nozzle 1, and the driving assembly is connected to the connecting assembly , and can drive the connected components to move back and forth.

[0023] When in use, the whole device is installed in the central hole of the pipeline to be welded. When the welding torch starts welding, the driving device is started and the shielding gas nozzle 1 is ejected at the same time. With the movement of the welding torch, the ...

Embodiment 2

[0025] The present invention is based on embodiment 1, and the present invention is further described.

[0026] Such as Figure 1-Figure 2 As shown, the present invention is beneficial to the device for improving the welding quality of large pipelines, the horizontal plate 4 is an arc plate, the gas nozzle 1 is evenly arranged on the inner concave surface of the horizontal plate 4 along the circumferential direction of the horizontal plate 4, and the gas nozzle 1 The paint spraying gas ends are all close to the axis of the cross plate 4. Setting the horizontal plate 4 as an arc plate can shorten the distance between the gas nozzle 1 and the intersection point of the horizontal plate 4 away from its radial centerline, so that the distance from each gas nozzle 1 to the intersection point is as uniform as possible, so that the weld seam can be obtained closer protective gas.

[0027] Further, a vertical plate 5 is also included, the shape of the vertical plate 5 is consistent w...

Embodiment 3

[0029] The present invention is based on embodiment 1, and the present invention is further described.

[0030] Such as Figure 1-Figure 2 As shown, the present invention is beneficial to the device for improving the welding quality of large-scale pipelines. The connecting assembly includes a connecting column 6 and a moving block 7. One end of the connecting column 6 is understood from the end of the horizontal plate 4 away from the gas nozzle 1. The connecting column 6 The other end is connected with moving block 7.

[0031] Further, the drive assembly includes a motor, a screw 8 parallel to each other and a limit rod 9, and a threaded hole cooperating with the screw 8 and a limit block cooperating with the limit rod 9 are provided on the moving block 7, the The motor drives the screw rod 8 to rotate, and drives the moving block 7 to move along the axis of the screw rod 8 . During installation, detachably fix the two ends of the screw rod 8 and the two ends of the stop rod...

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Abstract

The invention discloses a device for improving the welding quality of a large-size pipeline easily. The device comprises a transverse plate, a connecting assembly, a driving assembly and a plurality of air nozzles. The air nozzles are arranged on the transverse plate in a row, and the extension lines of the jetting ends of the air nozzles are converged at a point. The connecting assembly is connected with the end, away from the air nozzles of the transverse plate. The driving assembly is connected with the connecting assembly and can drive the connecting assembly to move back and forth. Protective gas is jetted from the air nozzles, and the driving device drives the transverse plate to move along with movement of a welding gun. Meanwhile, the intersection of the extension lines of the jetting ends of the air nozzles is located on a weld joint, in this way, when the welding gun is used for welding the large-size pipeline, the space around of the weld joint is filled with protective gas, the situation that the welded portion is oxidized or azotized by air is avoided, the quality of the weld joint is improved easily, and the service life of the pipeline is prolonged.

Description

technical field [0001] The invention relates to a shielding gas replenishment device for welding, in particular to a device for improving the welding quality of large-scale pipelines. Background technique [0002] In the petroleum manufacturing industry, it is often applied to large pipelines. During the manufacturing process of large pipes, steel plates are first bent into a cylindrical shape, and then welded to weld the two ends of the steel plates together. In butt welding, gas needs to be filled around the butt weld to ensure welding quality. The shielding gas can be carbon dioxide, argon, etc. It is mainly used as a shielding gas for arc welding or cutting stainless steel, magnesium, aluminum and other alloys, and the appropriate shielding gas is selected according to different welding parts. At present, most large-scale pipeline welding only sprays a certain amount of shielding gas around the welding torch, that is, there is only shielding gas on one side of the weld...

Claims

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Application Information

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IPC IPC(8): B23K9/32B23K101/06
CPCB23K9/323B23K2101/06
Inventor 贺昶明
Owner CHENGDU DAMO PETROLEUM TECH CO LTD
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