A manual device for preventing welding necking

A manual, necking technology, applied in welding equipment, auxiliary devices, auxiliary welding equipment, etc., can solve the problems of irreparable, low welding efficiency, unable to improve the welding quality of welding parts, etc., to improve welding efficiency, avoid deformation, The effect of improving welding quality

A manual, necking technology, applied in welding equipment, auxiliary devices, auxiliary welding equipment, etc., can solve the problems of irreparable, low welding efficiency, unable to improve the welding quality of welding parts, etc., to improve welding efficiency, avoid deformation, The effect of improving welding quality

CN105834615BActive Publication Date: 2018-10-16BC P INC CHINA NAT PETROLEUM CORP
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  • A manual device for preventing welding necking
  • A manual device for preventing welding necking
  • A manual device for preventing welding necking

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] Such as figure 1 As shown, the present invention provides a manual device for preventing welding necking, which is installed on the pipeline 4. The manual device for preventing welding necking includes: heating mechanism I, welding protection layer 7 and supporting mechanism II,

[0040] The heating mechanism 1 is used to provide heat energy to the pipeline 4 and provide preheating and insulation for the welded part of the pipeline 4,

[0041] The welding protection layer 7 is arranged on the welding part of the pipeline 4, and the welding protection layer 7 is used for heat preservation of the welding part of the pipeline 4,

[0042] The support mechanism II is arranged on the pipeline 4, and the support mechanism II is used t...

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Abstract

The invention discloses a manual-type device preventing necking during welding, pertaining to the field of oil pipeline construction. The manual-type device 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 a manual device for preventing welding necking. Background technique [0002] Welding necking refers to the phenomenon that the local radius decreases due to the shrinkage of the welding seam during the circumferential welding of pipelines and equipment. The specific reasons are: the pipeline and equipment will generate a lot of heat at the welding part during the welding process. The metal in the molten pool is in a molten state during welding, and the temperature is as high as 1000 degrees. After the welding is completed, the weld part is rapidly cooled to room temperature in the air. This part of the metal will undergo certain deformation under the action of temperature difference. When the welding heat input is large, the wall thickness of the welding base metal is thick, and when dissimilar metals are welded, the deformation will further increase. These deformation...

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Application Information

Patent Timeline
16 Oct 2018
Publication
CN105834615B
IPC
B23K37/00
Inventors
郭超; 李明