Automatic device for preventing necking during welding

An automatic necking technology, applied in the direction of auxiliary devices, welding equipment, welding equipment, etc., can solve the problems of low welding efficiency, inability to improve the welding quality of welding parts, and irreparable problems, so as to improve welding efficiency, improve welding quality, Solve the effect of welding deformation

Active Publication Date: 2016-08-10
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] In order to solve the existing problems of low welding efficiency, inability to improve the welding quality of welding parts, and ir

Method used

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  • Automatic device for preventing necking during welding
  • Automatic device for preventing necking during welding
  • Automatic device for preventing necking during welding

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Embodiment Construction

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] like figure 1 shown, see also Figure 2 to Figure 5 , this example uses figure 1 For the purpose of explanation, the present invention provides an automatic welding necking prevention device, which is installed on the pipeline 33. The automatic welding necking prevention device includes: a heating mechanism 35, a welding protective layer 36 and a support mechanism II ,

[0037] The heating mechanism 35 is used to provide thermal energy to the pipe 33 and to provide preheating and heat preservation for the welded part of the pipe 33,

[0038] The welding protection layer 36 is arranged on the welding part of the pipeline 33, and the welding protection layer 36 is used for heat preservation of the welding part of the pipeline 33,

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Abstract

The invention discloses an automatic device for preventing necking during welding, pertaining to the field of petroleum pipeline construction. The automatic device for preventing necking during welding is installed on a pipeline and comprises a heating mechanism, a welding protection layer and a support mechanism. The heating mechanism is used for providing heat energy to the pipeline and preheating and warming a welding position of the pipeline. The welding protection layer is arranged on the welding position of the pipeline and used for warming the welding part of the pipeline. The support mechanism is arranged on the pipeline and used for supporting and warming a weld pass of the pipeline. By means of the above structure, functions of heating, warming and diameter expansion are integrated so that problems of weld deformation of pipes and equipment are solved. Deformation at the welding position due to temperature difference during welding is avoided. Welding quality at the welding position is improved and welding efficiency is increased. The necking part can restore to its original state.

Description

technical field [0001] The invention relates to the field of oil pipeline construction, in particular to an automatic device for preventing welding necking. Background technique [0002] Welding necking refers to the phenomenon that the local radius is reduced due to the shrinkage of the weld seam in the process of circumferential welding of pipelines and equipment. The specific reason is: pipelines and equipment will generate a lot of heat at the welding part during the welding process. During welding, the metal in the molten pool is in a molten state, and the temperature is as high as 1000 degrees. This part of the metal will deform to a certain extent under the action of the temperature difference. When the welding heat input is large, the wall thickness of the welding base metal is thick, and the dissimilar metals are welded, the deformation will further increase. These deformations will cause the size of the pipeline or equipment to deviate, and even lead to cracks in...

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Application Information

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IPC IPC(8): B23K31/00B23K37/00B23K37/053B23K101/10
Inventor 郭超俞龙赵泽茂谢灿波徐海涛
Owner BC P INC CHINA NAT PETROLEUM CORP
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