CN107639324B - Assembling method for thick-wall pipeline grooves - Google Patents
Assembling method for thick-wall pipeline grooves Download PDFInfo
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- CN107639324B CN107639324B CN201710671068.6A CN201710671068A CN107639324B CN 107639324 B CN107639324 B CN 107639324B CN 201710671068 A CN201710671068 A CN 201710671068A CN 107639324 B CN107639324 B CN 107639324B
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Abstract
The invention particularly relates to a method for assembling grooves of thick-wall pipelines; the method is characterized in that: comprises the steps of placing a pipeline on a working platform; fixing the pipelines by using positioning frames respectively; inserting a gap adjusting ruler into a gap between two sections of pipelines, and adjusting the two sections of pipelines to enable the gap adjusting ruler to be attached to the two sections of pipelines simultaneously; inserting a gap positioning block at the gap of the two sections of pipelines; respectively spot-welding the gap positioning blocks, and after the spot welding is completed, moving the assembled pipeline to the other side of the working platform for complete welding; and removing the gap positioning blocks, enabling the pipeline to enter a welding process, and polishing by a grinder to remove the spot welding gap positioning blocks after the priming welding or the sectional priming welding is finished. The method adopts the gap positioning blocks to accurately control the gap between the pipelines, and meanwhile, the gap positioning blocks can be removed, so that the pipelines are not damaged, and compared with the traditional pipeline pairing method, the method has the advantages of high pairing speed and good pairing effect.
Description
Technical Field
The invention relates to the field of pipeline engineering, in particular to a method for assembling grooves of thick-wall pipelines.
Background
The pipeline assembly is an important step in the pipeline welding control, the control of the groove gap is a difficult point of the pipeline assembly, particularly for a pressure pipeline, the quality of the pipeline welding quality is directly affected by the groove gap adjustment, and under the general condition, the pipeline welding adopts single-sided welding and double-sided forming, so that argon tungsten arc welding is generally adopted in the pipeline welding, and the welding method is most beneficial to ensuring the internal quality of the pipeline welding. However, in the case of welding thick-wall pipes, welding deformation is often generated with heat input during welding due to high welding penetration, and the welding quality of the pipes is seriously affected, so that the gap of the grooves must be strictly controlled. Two general groove gap adjustment methods are adopted, one is to fix through spot welding rib plates, but the parent metal is damaged; the other is direct spot welding after assembly, but the size of the gap is not beneficial to control, so that the welding quality is affected.
Disclosure of Invention
The invention aims to provide a pairing method for controlling welding deformation, which can not hurt a parent metal and improve welding quality.
In order to achieve the above object, the present invention is achieved by:
a method for assembling thick-wall pipeline grooves comprises a working platform, a pipeline positioning frame, a clearance adjusting ruler and a clearance positioning block, wherein the assembling method comprises the following steps of
step 2, fixing two sections of pipelines on two sides of a working platform by using a locating frame respectively;
step 4, adjusting the two sections of pipelines to enable the gap adjusting ruler to be attached to the two sections of pipelines simultaneously;
step 6, respectively spot-welding the gap positioning blocks at the arc positions of 0 DEG, 90 DEG and 270 DEG of grooves of two sections of pipelines, step 7, after turning over the pipelines along the axis of the pipelines by 180 DEG, moving the assembled pipelines to the other side of the working platform for complete welding after spot-welding the gap positioning blocks in the 180 DEG direction;
and 8, removing the gap positioning blocks, enabling the pipeline to enter a welding procedure, and polishing by a grinder to remove the spot welding gap positioning blocks after the priming welding or the sectional priming welding is finished.
In the assembling method of the thick-wall pipeline grooves, the section of the clearance adjusting ruler is in an inverted V shape.
According to the method for assembling the thick-wall pipeline grooves, two side faces of the gap positioning block are inclined, the angle of the inclined face is the same as that of the end face of the pipeline to be assembled, namely when two sections of pipelines are assembled, two sides of the gap positioning block are completely attached to the end face of the pipeline.
The method adopts the gap positioning blocks to accurately control the gap between the pipelines, and meanwhile, the gap positioning blocks can be removed, so that the pipelines are not damaged, and compared with the traditional pipeline pairing method, the method has the advantages of high pairing speed and good pairing effect.
Drawings
Fig. 1 is a schematic diagram of a pipeline groove gap adjustment for the present pairing method.
Fig. 2 is a cross-sectional view taken along A-A in fig. 1.
Fig. 3 is a partial enlarged view at B in fig. 1.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in figures 1-3, the assembling method of the thick-wall pipeline groove comprises a working platform 1, a pipeline positioning frame 3, a gap adjusting ruler 4 and a gap positioning block 7, wherein the assembling method comprises the following steps of
step 2, fixing two sections of pipelines on two sides of a working platform by using a pipeline positioning frame 3 respectively;
step 4, adjusting the two sections of pipelines 5 and 6 to enable the gap adjusting ruler 4 to be attached to the two sections of pipelines simultaneously;
step 6, respectively spot-welding the gap positioning blocks 7 at the arc 0 DEG, 90 DEG and 270 DEG of the grooves of the two sections of pipelines 5 and 6,
and 8, removing the gap positioning blocks 7, enabling the pipelines 5 and 6 to enter a welding process, and polishing and removing the spot welding gap positioning blocks by a grinder after the priming welding or the sectional priming welding is finished.
In the assembling method of the thick-wall pipeline grooves, the section of the clearance adjusting ruler 4 is in an inverted V shape.
According to the assembly method of the thick-wall pipeline grooves, the two side faces of the gap positioning block 7 are inclined, the angle of the inclined faces is the same as that of the end faces of the pipelines 5 and 6 to be assembled, namely when two sections of pipelines are assembled, the two sides of the gap positioning block are completely attached to the end faces of the pipelines.
The method adopts the gap positioning blocks to accurately control the gap between the pipelines, and meanwhile, the gap positioning blocks can be removed, so that the pipelines are not damaged, and compared with the traditional pipeline pairing method, the method has the advantages of high pairing speed and good pairing effect.
Claims (3)
1. A method for assembling thick-wall pipeline grooves is characterized by comprising the following steps: comprises a working platform, a pipeline locating frame, a clearance adjusting ruler and a clearance locating block, wherein the assembling method comprises the following steps of
Step 1, placing two sections of pipelines to be butted on a working platform;
step 2, fixing two sections of pipelines on two sides of a working platform by using a pipeline positioning frame respectively;
step 3, inserting a gap adjusting ruler into a gap between two sections of pipelines, wherein the gap adjusting ruler is attached to a port of any section of pipeline;
step 4, adjusting the two sections of pipelines to enable the gap adjusting ruler to be attached to the two sections of pipelines simultaneously;
step 5, inserting a gap positioning block at the gap of the two sections of pipelines in the step 4;
step 6, respectively spot-welding the gap positioning blocks at the arc 0 DEG, 90 DEG and 270 DEG of the groove of the two sections of pipelines;
step 7, after the pipeline is turned over by 180 degrees along the axis of the pipeline, spot welding a gap positioning block in the 180-degree direction, and after the spot welding is finished, moving the assembled pipeline to the other side of the working platform for complete welding;
and 8, removing the gap positioning blocks, enabling the pipeline to enter a welding procedure, and polishing by a grinder to remove the spot welding gap positioning blocks after the priming welding or the sectional priming welding is completed.
2. The method for assembling grooves of thick-wall pipelines according to claim 1, wherein the method comprises the following steps: the section of the clearance adjusting ruler is in an inverted V shape.
3. The method for assembling grooves of thick-wall pipelines according to claim 1, wherein the method comprises the following steps: the two side surfaces of the gap positioning block are inclined, the angle of the inclined surface is the same as that of the end surface of the pipeline to be assembled, namely, when two sections of pipelines are assembled, the two sides of the gap positioning block are completely attached to the end surface of the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671068.6A CN107639324B (en) | 2017-08-08 | 2017-08-08 | Assembling method for thick-wall pipeline grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671068.6A CN107639324B (en) | 2017-08-08 | 2017-08-08 | Assembling method for thick-wall pipeline grooves |
Publications (2)
| Publication Number | Publication Date |
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| CN107639324A CN107639324A (en) | 2018-01-30 |
| CN107639324B true CN107639324B (en) | 2023-07-14 |
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| CN201710671068.6A Active CN107639324B (en) | 2017-08-08 | 2017-08-08 | Assembling method for thick-wall pipeline grooves |
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| JP2000176639A (en) * | 1998-12-21 | 2000-06-27 | Sankyu Inc | Tig automatic welding method of boiler tubing |
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| CN107639324A (en) | 2018-01-30 |
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