CN110695606A - High-altitude pipeline butt joint device and method - Google Patents
High-altitude pipeline butt joint device and method Download PDFInfo
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- CN110695606A CN110695606A CN201911030933.4A CN201911030933A CN110695606A CN 110695606 A CN110695606 A CN 110695606A CN 201911030933 A CN201911030933 A CN 201911030933A CN 110695606 A CN110695606 A CN 110695606A
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- 210000001503 joint Anatomy 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000003032 molecular docking Methods 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a butt joint device and a butt joint method for high-altitude pipelines, which comprise the following steps: the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are oppositely arranged; the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are butted to form a pipe hoop-shaped structure so as to clamp two sections of pipelines to be butted; the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are both provided with a plurality of adjusting pieces along the radial direction so as to adjust the interface positions of the two sections of pipelines to be aligned. The invention has simple structure and simple material needed for manufacturing, and can be obtained from local materials on the construction site; the application range is wide, and the large-scale production is facilitated; the butt joint device is convenient to operate, solves the problems of high labor intensity and high equipment use cost in the butt joint of the high-altitude pipelines, ensures the safety of the butt joint operation of the high-altitude pipelines and saves labor.
Description
Technical Field
The invention relates to the technical field of pipeline butt joint, in particular to a butt joint device and a butt joint method for an overhead pipeline.
Background
In the metallurgical industry, the piping erection is the most common, and multiple position occasionally of piping erection, some in the bottom, some in the high altitude, the pipe diameter also has the branch of size, and the butt joint of bottom pipeline is comparatively convenient easily, and the constrictive pipeline in high altitude is then different, and the degree of difficulty is big to the installation, and the degree of difficulty is the biggest then for the installation of high altitude big pipe diameter pipeline, how to look for a high-efficient convenient high altitude big pipe diameter piping erection is the first-priority problem that needs to solve at present.
The most important thing of pipeline butt joint is concentricity, and the adjustment of concentricity is more difficult when high altitude butt joint, and the mode of adopting traditional manual regulation not only intensity of labour is big, and the cycle is long moreover. If the concentricity is adjusted by using a mechanical tool, the requirement on the field is high, and the cost is high.
Disclosure of Invention
In view of the above, the invention provides a docking device and a docking method for high-altitude pipelines, and aims to solve the problem that the existing high-altitude pipelines are difficult to dock.
In one aspect, the present invention provides a docking device for high-altitude pipelines, including: the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are oppositely arranged; the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are butted to form a pipe hoop-shaped structure so as to clamp two sections of pipelines to be butted; the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are both provided with a plurality of adjusting pieces along the radial direction so as to adjust the interface positions of the two sections of pipelines to be aligned.
Further, in the above high-altitude pipeline butt joint device, the adjusting pieces on the first arc-shaped clamping piece are uniformly distributed, the adjusting pieces on the second arc-shaped clamping piece are uniformly distributed, and the adjusting pieces on the first arc-shaped clamping piece and the adjusting pieces on the second arc-shaped clamping piece are arranged in a one-to-one correspondence manner.
Further, in the above docking device for high-altitude pipelines, the first arc-shaped clamping mechanism includes: two first semi-circular ring-shaped members; the two first semicircular ring-shaped pieces are arranged in parallel, a plurality of first connecting pieces are arranged between the two first semicircular ring-shaped pieces, and a plurality of adjusting pieces are arranged on each first connecting piece in a penetrating mode; two the both ends of first semicircle loop forming element correspond respectively and are provided with first connecting portion to realize with second arc fixture's is connected.
Further, in the above-mentioned aligning device for overhead pipes, the second arc-shaped gripping mechanism includes: two second semi-circular ring-shaped members; the two second semi-circular pieces are arranged in parallel, a plurality of second connecting pieces are arranged between the two second semi-circular pieces, and a plurality of adjusting pieces are arranged on each second connecting piece in a penetrating mode; and two ends of the second semi-circular ring-shaped piece are respectively and correspondingly provided with a second connecting part, and the second connecting parts are matched with the first connecting parts so as to realize the detachable connection of the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism.
Further, in the above docking device for high-altitude pipelines, the first connection portion is of a circular structure and is provided with a first connection hole.
Further, in the above-mentioned aligning apparatus for an aerial duct, the second connecting portion includes: two oppositely arranged connecting sheets; one end of each of the two connecting pieces is connected to two sides of the end of the second semi-circular ring-shaped piece, the other end of each of the two connecting pieces extends to two sides of the first connecting portion, and the connecting pieces are provided with second connecting holes corresponding to the first connecting holes.
Further, in the aligning device for the high-altitude pipeline, the adjusting piece is a threaded rod, the adjusting piece is in threaded connection with the first connecting piece and the second connecting piece, and the nut end of the adjusting piece faces the surface of the pipeline to be aligned.
Furthermore, in the butt joint device for the high-altitude pipeline, each first connecting piece is uniformly distributed between two first semicircular ring-shaped pieces; and/or each second connecting piece is uniformly distributed between two second semicircular ring-shaped pieces.
Furthermore, in the docking device for the high-altitude pipeline, two adjusting pieces are arranged on each first connecting piece; and/or two adjusting pieces are arranged on each first connecting piece.
The invention has simple structure and simple material needed for manufacturing, and can be obtained from local materials on the construction site; the application range is wide, and the large-scale production is facilitated; the butt joint device is convenient to operate, solves the problems of high labor intensity and high equipment use cost in the butt joint of the high-altitude pipelines, ensures the safety of the butt joint operation of the high-altitude pipelines and saves labor.
On the other hand, the invention also provides a butting method of the high-altitude pipeline, which comprises the following steps:
step 1, placing a first arc-shaped clamping mechanism and a second arc-shaped clamping mechanism of a butting device of high-altitude pipelines at an interface of two sections of pipelines for positioning, and locking the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism after positioning; step 2, aligning the positions of the interfaces of the two sections of pipelines by adjusting each adjusting piece on the butting device; and 3, after the joint positions of the two sections of pipelines are aligned and the two sections of pipelines are fixed by spot welding, removing the butt joint device, and finally welding the two sections of pipelines to be in butt joint to finish the butt joint work.
The high-altitude pipeline butt joint method provided by the invention is simple and rapid to operate, high in butt joint quality, efficient and safe.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of a use state of a docking device for high-altitude pipelines according to an embodiment of the present invention;
fig. 2 is a front view of a docking device for high-altitude pipelines according to an embodiment of the present invention;
fig. 3 is a top view of a docking device for high-altitude pipelines provided by an embodiment of the invention;
fig. 4 is a side view of a docking device for high altitude pipes according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment of the device is as follows:
referring to fig. 1 to 4, the docking device for high-altitude pipelines according to the embodiment of the present invention includes: the first arc-shaped clamping mechanism 1 and the second arc-shaped clamping mechanism 2 are oppositely arranged; the first arc clamping mechanism 1 and the second arc clamping mechanism 2 are butted to form a pipe hoop-shaped structure so as to clamp two sections of pipelines 4 to be butted; the first arc-shaped clamping mechanism 1 and the second arc-shaped clamping mechanism 2 are both provided with a plurality of adjusting pieces 3 along the radial direction so as to adjust the interface positions of the two sections of pipelines 4 to be aligned.
Specifically, first arc fixture 1 can dismantle with second arc fixture 2 and be connected to in the butt joint treat the butt joint on the pipeline. First arc fixture 1 can be semi-circular platelike structure, and second arc fixture 2 also can be semi-circular platelike structure, and two semi-circular platelike structures can form circular clamp after joint or spiro union connection, and the diameter of this circular clamp can be greater than the diameter of treating to mouthful pipeline 4. The surface of the semicircular plate-shaped structure is provided with a plurality of threaded holes, and the adjusting piece 3 radially penetrates through the corresponding mounting hole to adjust the interface positions of the two sections of pipelines to be aligned. 3 evenly distributed of each regulating part on the first arc holder 1, 3 evenly distributed of each regulating part on the second arc holder 2, and each regulating part 3 on the first arc holder 1 and each regulating part 3 on the second arc holder 2 one-to-one set up.
The adjusting part 3 can be in a screw thread structure, and the tightness of the adjusting part 3 which is arranged on the first arc-shaped clamping part 1 and the second arc-shaped clamping part 3 relatively can be adjusted to adjust the positions of the two sections of pipeline connectors.
As a specific implementation manner of this embodiment, the first arc-shaped clamping mechanism 1 may include: two first semi-circular ring-shaped members 11; the two first semicircular ring-shaped pieces 11 are arranged in parallel, a plurality of first connecting pieces 12 are arranged between the two first semicircular ring-shaped pieces 11, and a plurality of adjusting pieces 3 penetrate through each first connecting piece 12; two ends of the first semicircular ring-shaped member 11 are respectively and correspondingly provided with a first connecting part 111, so as to realize the connection with the second arc-shaped clamping mechanism 2. Wherein, first semicircle ring piece 11 can be semicircle ring shape billet structure, and two first semicircle ring piece 11 can parallel arrangement, and two end of two first semicircle ring piece 11 level mutually, and the distance between two first semicircle ring piece 11 can be confirmed according to actual conditions, and it can to make two first semicircle ring piece 11 fasten respectively on treating two sections pipelines to the mouth. The two first semicircular ring-shaped parts 11 are respectively clamped at the positions, close to the joints, of the two sections of pipelines, so that the stability and the accuracy of the butt joint work can be ensured.
Each first connecting member 12 is connected transversely between two first semi-circular ring members 11, for example the first connecting member 12 may be welded between the inner side walls of the two first semi-circular ring members 11. In order to ensure a stable connection of the two first semi-circular ring shaped members 11, the respective first connecting members 12 are evenly distributed between the two first semi-circular ring shaped members 11. One or more adjusting members 3 may be disposed on each first connecting member 12, and preferably, two adjusting members 3 are disposed on each first connecting member 12, wherein one adjusting member 3 may face the surface of one section of the pipeline to be aligned, and the other adjusting member 3 may face the surface of the other section of the pipeline to be aligned.
The first connecting portion 111 may have a circular structure, and a first connecting hole (not shown) is formed thereon. An end of each first semicircular member 11 may be integrally formed with the first connection part 111.
The second arc fixture 2 includes: two second semi-circular ring-shaped members 21; the two second semi-circular ring-shaped members 21 are arranged in parallel, a plurality of second connecting members 22 are arranged between the two second semi-circular ring-shaped members 21, and a plurality of adjusting members 3 penetrate through each second connecting member 22; two ends of the second semi-circular ring-shaped member 21 are respectively and correspondingly provided with a second connecting portion (not shown in the figure), and the second connecting portion is matched with the first connecting portion 111 to realize detachable connection of the first arc-shaped clamping mechanism 1 and the second arc-shaped clamping mechanism 2.
Wherein, second semi-circular ring shape piece 21 can be half annular billet structure, and two second semi-circular ring shape pieces 21 can parallel arrangement, and two tip of two second semi-circular ring shape pieces 21 flush mutually, and the distance between two second semi-circular ring shape pieces 21 can be confirmed according to actual conditions, and it can to enable two second semi-circular ring shape pieces 21 to fasten respectively on treating two sections pipelines to mouthful. The two second semi-circular ring-shaped pieces 21 are respectively clamped at the positions, close to the joints, of the two sections of pipelines, so that the stability and the accuracy of the butt joint work can be ensured.
Each second connecting member 22 is connected transversely between two second semi-circular ring members 21, for example the second connecting member 22 may be welded between the inner side walls of the two second semi-circular ring members 21. In order to ensure a stable connection of the two second semi-circular ring-shaped members 21, the respective second connecting members 22 are evenly distributed between the two second semi-circular ring-shaped members 21. One or more adjusting members 3 may be provided on each second connecting member 22, and preferably, two adjusting members 3 are provided on each second connecting member 22, wherein one adjusting member 3 may face the surface of one of the sections of pipe to be aligned, and the other adjusting member 3 may face the surface of the other section of pipe to be aligned. In this embodiment, the number of the adjusting members 3 on the second semicircular member 21 and the adjusting members 3 on the first semicircular member 11 may be arranged in a one-to-one correspondence.
The second connection portion includes: two oppositely disposed connecting pieces 211; one end of each of the two connecting pieces 211 is connected to two sides of the end of the second semi-circular ring-shaped member 21, the other end of each of the two connecting pieces 211 extends to two sides of the first connecting portion 111, and the connecting pieces 211 are provided with second connecting holes (not shown) corresponding to the first connecting holes. One end of the two connection pieces 211 may be welded to both sides of the end of the second semi-circular ring shaped member 21, and the other end may be connected to the first connection portion 111 by the fastener 5. First arc fixture 1 with second arc fixture 2 wears to locate in proper order through the fastener and corresponds first connecting portion 111 with the connection can be dismantled in the realization of second connecting portion 221 to can lock treat to the mouth pipeline. Wherein the fastener may be a locking bolt.
The adjusting member 3 may be a threaded rod, which is in threaded connection with both the first connecting member 12 and the second connecting member 22, and a nut end of the adjusting member 3 faces the surface of the pipe to be aligned, so as to increase the contact area between the adjusting member 3 and the surface of the pipe to be aligned.
The butt joint device for the high-altitude pipelines provided by the embodiment has the advantages that the structure is simple, materials required for manufacturing are simple, and local materials can be obtained on the construction site; the application range is wide, and the large-scale production is facilitated; the butt joint device is convenient to operate, solves the problems of high labor intensity and high equipment use cost in the butt joint of the high-altitude pipelines, ensures the safety of the butt joint operation of the high-altitude pipelines and saves labor.
The method comprises the following steps:
the invention also provides a butting method of the high-altitude pipelines, which comprises the following steps:
and step S1, placing a first arc-shaped clamping mechanism and a second arc-shaped clamping mechanism of the butting device of the high-altitude pipelines at the joint of the two pipelines for positioning, and locking the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism after positioning. For the specific structure of the docking device, reference may be made to the above-mentioned embodiments of the device, which are not described herein again.
And step S2, aligning the interface positions of the two sections of pipelines by adjusting each adjusting piece on the butting device. For example, the accuracy of the butt joint operation can be ensured by adjusting the tightness of the adjusting pieces at the relative positions of the first arc-shaped clamping piece and the second arc-shaped clamping piece at the butt joint position of the two sections of pipelines.
And step S3, after the joint positions of the two sections of pipelines are aligned and the two sections of pipelines are fixed by spot welding, the butt joint device is removed, and finally the two sections of pipelines are welded together to finish the butt joint work.
The pipeline butt joint method provided by the invention is simple and rapid to operate, high in butt joint quality, efficient and safe.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a high altitude pipeline's interfacing apparatus which characterized in that includes: the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are oppositely arranged; wherein,
the first arc clamping mechanism and the second arc clamping mechanism are butted to form a pipe hoop-shaped structure so as to clamp two sections of pipelines to be butted;
the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism are both provided with a plurality of adjusting pieces along the radial direction so as to adjust the interface positions of the two sections of pipelines to be aligned.
2. The docking device for overhead pipes of claim 1, wherein the adjusting members of the first arc-shaped clamping member are evenly distributed, the adjusting members of the second arc-shaped clamping member are evenly distributed, and the adjusting members of the first arc-shaped clamping member and the adjusting members of the second arc-shaped clamping member are arranged in a one-to-one correspondence manner.
3. The docking device for overhead pipes of claim 1 wherein the first arcuate clamping mechanism comprises: two first semi-circular ring-shaped members; wherein,
the two first semicircular ring-shaped pieces are arranged in parallel, a plurality of first connecting pieces are arranged between the two first semicircular ring-shaped pieces, and a plurality of adjusting pieces are arranged on each first connecting piece in a penetrating manner;
two the both ends of first semicircle loop forming element correspond respectively and are provided with first connecting portion to realize with second arc fixture's is connected.
4. The docking device for overhead pipes of claim 3 wherein the second arcuate clamping mechanism comprises: two second semi-circular ring-shaped members; wherein,
the two second semi-circular pieces are arranged in parallel, a plurality of second connecting pieces are arranged between the two second semi-circular pieces, and a plurality of adjusting pieces are arranged on each second connecting piece in a penetrating mode;
and two ends of the second semi-circular ring-shaped piece are respectively and correspondingly provided with a second connecting part, and the second connecting parts are matched with the first connecting parts so as to realize the detachable connection of the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism.
5. The docking device for overhead pipes of claim 4, wherein the first connection portion is a circular structure with a first connection hole.
6. The docking device for high altitude pipes of claim 5, wherein the second connection portion comprises: two oppositely arranged connecting sheets; wherein,
one end of each of the two connecting pieces is connected to two sides of the end of the second semi-circular ring-shaped piece, the other end of each of the two connecting pieces extends to two sides of the first connecting portion, and second connecting holes corresponding to the first connecting holes are formed in the connecting pieces.
7. The docking device for overhead pipes of claim 3 wherein the adjusting member is a threaded rod that is threadedly connected to both the first connector and the second connector, and the nut end of the adjusting member faces the surface of the pipe to be docked.
8. The docking device for overhead pipes of claim 3 wherein each of the first connectors is evenly distributed between two of the first semi-circular ring members; and/or each second connecting piece is uniformly distributed between two second semicircular ring-shaped pieces.
9. The docking device for high altitude pipelines according to claim 3, wherein two said adjusting members are provided on each said first connecting member; and/or two adjusting pieces are arranged on each first connecting piece.
10. A high-altitude pipeline butt joint method is characterized by comprising the following steps:
step 1, placing a first arc-shaped clamping mechanism and a second arc-shaped clamping mechanism of a butting device of high-altitude pipelines at an interface of two sections of pipelines for positioning, and locking the first arc-shaped clamping mechanism and the second arc-shaped clamping mechanism after positioning;
step 2, aligning the positions of the interfaces of the two sections of pipelines by adjusting each adjusting piece on the butting device;
and 3, after the joint positions of the two sections of pipelines are aligned and the two sections of pipelines are fixed by spot welding, removing the butt joint device, and finally welding the two sections of pipelines to be in butt joint to finish the butt joint work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030933.4A CN110695606A (en) | 2019-10-28 | 2019-10-28 | High-altitude pipeline butt joint device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030933.4A CN110695606A (en) | 2019-10-28 | 2019-10-28 | High-altitude pipeline butt joint device and method |
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| CN110695606A true CN110695606A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911030933.4A Pending CN110695606A (en) | 2019-10-28 | 2019-10-28 | High-altitude pipeline butt joint device and method |
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| CN (1) | CN110695606A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111975236A (en) * | 2020-07-23 | 2020-11-24 | 南京钢铁股份有限公司 | Method for ensuring concentricity and strength of online butt welding of two shafts |
| CN112431974A (en) * | 2020-12-12 | 2021-03-02 | 中冶天工集团有限公司 | Detachable steel pipeline aligning tool |
| CN113478128A (en) * | 2021-07-07 | 2021-10-08 | 中冶集团武汉勘察研究院有限公司 | Pipe conveying butt joint positioning system for long-distance pipeline installation |
| CN113732613A (en) * | 2021-09-14 | 2021-12-03 | 中国矿业大学 | Novel welding fixture and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975236A (en) * | 2020-07-23 | 2020-11-24 | 南京钢铁股份有限公司 | Method for ensuring concentricity and strength of online butt welding of two shafts |
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| CN113478128A (en) * | 2021-07-07 | 2021-10-08 | 中冶集团武汉勘察研究院有限公司 | Pipe conveying butt joint positioning system for long-distance pipeline installation |
| CN113478128B (en) * | 2021-07-07 | 2022-09-23 | 中冶集团武汉勘察研究院有限公司 | Pipe conveying butt joint positioning system for long-distance pipeline installation |
| CN113732613A (en) * | 2021-09-14 | 2021-12-03 | 中国矿业大学 | Novel welding fixture and use method |
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