CN108637584A - A kind of flange welding automatic centering fixture - Google Patents
A kind of flange welding automatic centering fixture Download PDFInfo
- Publication number
- CN108637584A CN108637584A CN201810833533.6A CN201810833533A CN108637584A CN 108637584 A CN108637584 A CN 108637584A CN 201810833533 A CN201810833533 A CN 201810833533A CN 108637584 A CN108637584 A CN 108637584A
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- rack
- frame
- connecting rod
- flange
- latch hook
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- 238000003466 welding Methods 0.000 title claims abstract description 14
- 210000000744 eyelid Anatomy 0.000 claims abstract description 21
- 210000003128 head Anatomy 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- 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
- B23K37/0531—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 internal 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
- 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
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
The purpose of the present invention is to provide a kind of flange welding automatic centering fixtures, to solve the problems, such as flange and the nozzle centering in pipeline welding process.Its is simple in structure, and processing cost is low, is very suitable for engineer application.The technical solution adopted by the present invention is：A kind of flange welding automatic centering fixture, which is characterized in that main body is divided into flange clamp system and pipeline clamp system two parts；Wherein flange clamp system is made of latch hook 5, rack 6, long connecting rod 7, big nut 1, A-frame 1, big nut 2 10, and pipeline clamp system is made of sliding support 1, connecting rod 1, eyelid retractor 3, connecting rod 34, rack 6, primary nut 11, pull rod 12, connecting rod 2 13, spring 14, A-frame 2 15.
Description
Technical field
The present invention relates to pipeline engineering, mechanical engineering, chemical field etc., especially a kind of flange welding automatic centering folders
Tool.
Background technology
In the process of construction of a large amount of process industry production line, the proportion shared by pipeline is not allowed to despise.Pipeline construction exists
Many positions need to be attached after tubing and flange welding for the ease of maintenance in work progress.The weldering of pipeline and flange
Centering problem in termination process is always an important factor for influencing pipeline welding quality, to be badly in need of simple and effective equipment and solved
Certainly, the working strength of construction personnel is reduced.
Invention content
The deficiency of present situation in view of the above technology, the purpose of the present invention is to provide a kind of flange welding automatic centering fixture,
To solve the problems, such as flange and the nozzle centering in pipeline welding process.Its is simple in structure, and processing cost is low, is very suitable for engineering and answers
With.
The technical solution adopted by the present invention is：A kind of flange welding automatic centering fixture, which is characterized in that main body is divided into method
Blue clamp system and pipeline clamp system two parts；Wherein flange clamp system is by latch hook 5, rack 6, long connecting rod 7, big nut one
8, A-frame 1, big nut 2 10 constitute, the latch hook 5 totally three, each latch hook by latch hook head, rectangular draw runner main body and
Back hinge is constituted, and the rack 6 is made of cylinder slide bar section and screw thread shell of column, extends laterally that there are three circles two sections of junctions
The rectangular sliding slot of semi-open type of all arrays, three latch hooks 5 pass through the half of the rectangular draw runner main body of itself and the circumference array in rack 6
The rectangular sliding slot formation of open type is slidably matched, and keeps latch hook 5 free to slide along the rectangular sliding slot of semi-open type；Long connecting rod 7 totally three, often
Respectively with the hinge connection on the hinge and A-frame 1 at 5 back of latch hook, A-frame 1 is assemblied in rack 6 at the both ends of root
In the threaded post of tail portion, and it can slide axially along it；Big nut 1 and big nut 2 10 pass through screw thread pair and 6 tail portion of rack
Threaded post is coordinated, and realizes positioning of the A-frame 1 in the threaded post of 6 tail portion of rack.
Pipeline clamp system is by sliding support 1, connecting rod 1, eyelid retractor 3, connecting rod 34, rack 6, primary nut 11, pull rod
12, connecting rod 2 13, spring 14, A-frame 2 15 are constituted；The cylinder slide bar section outer surface axial direction array of the rack 6 has flower
Key, offers the pin runner 16 of bar shaped wherein between two adjacent splines, the cylinder that sliding support 1 is set in rack 6 is slided
On bar, local array has the axial splines formula sliding slot with the spline fitted, allows sliding support 1 along the cylinder of rack 6
Sliding bar, for each circumferential array there are three hinge, the eyelid retractor 3 is that section is U-shaped bar-shaped trough on the outside of 1 both ends of sliding support
Body, both ends are equipped with hinge hole, and connecting rod 1, eyelid retractor 3, connecting rod 2 13 and sliding support 1 are mutually connected by hinges 26 into three groups
The parallel four-bar linkage of circumference array, three connecting rods 34 are by three eyelid retractors 3 close to the semi-open type side of 6 circumference array of rack
One end of shape sliding slot is connected through the hinge to form the four-bar mechanism movable supporting linkage of circumference array with A-frame 2 15
System, the A-frame 2 15 are set in one end of the rectangular sliding slot of close semi-open type of cylinder slide bar section.
The axle center of the rack 6 is designed with perforative cylindrical cavity, and pull rod 12 is assemblied in the axle center cylindrical empty of rack 6
Intracavitary can slide along, and the head of pull rod 12 is connect by pin 19 with the pin hole on sliding support 1, and pin 19 is slided through pin
Slot 16, and can the sliding in pin runner 16；Pull rod 12 is equipped with external screw thread, and primary nut 11 is coordinated with pull rod 12 by screw thread pair, small
Nut 11 for being resisted against 6 screw thread styletable of rack to being positioned to pull rod 12, sliding support 1 and A-frame 2 15 it
Between be equipped with spring 14 for resetting.
It can make three groups by pulling pull rod 12 to adjust position of the sliding support 1 relative to rack by turning primary nut 11
Distance change of the eyelid retractor 3 relative to 6 axle center of rack in four-bar mechanism, to realize the clamping to pipeline inside pipeline；
During turning primary nut clamping pipe, parallel four-bar linkage ensure that eyelid retractor 3 and present clip
Axle center is parallel always, this make pipeline realized simultaneously during being clamped with it is of the invention in holder axis in；Due to method
It is blue to realize centering with the fixture in the present invention simultaneously in clamping process, so the present invention indirectly realizes flange and welded pipe
The centering in road operates.
During clamping pipe, since parallel―ordinal shift movement makes pipeline be existed simultaneously to during clamped
It is clamped the movement tendency of flange, this generates certain prestressing force to make pipeline end face on being tightly attached to flange face, keeps the two real
Now preferably contact, in addition after pipeline is clamped, if there is the trend to fall off backward, the parallel four-bar linkage in the present invention
It will produce the trend expanded outwardly simultaneously, frictional force increases when increasing the extruding force of eyelid retractor 3 and inside pipe wall, realizes friction self-locking
Prevent shedding.
Description of the drawings
Fig. 1 overall setup schematic layout patterns of the present invention；
Fig. 2 Ben Fanei step up principle schematic diagram；
Fig. 3 rack construction schematic diagrames of the present invention；
Fig. 4 one structural schematic diagrams of A-frame of the present invention；
Fig. 5 two structural schematic diagrams of A-frame of the present invention；
Fig. 6 sliding support structural schematic diagrams of the present invention；
Fig. 7 eyelid retractor structural schematic diagrams of the present invention；
Fig. 8 pull rod assembly structural schematic diagrams of the present invention；
Fig. 9 latch hook structure schematic diagrames of the present invention；
In figure：1 sliding support, 2 connecting rods one, 3 eyelid retractors, 4 connecting rods three, 5 latch hooks, 6 racks, 7 long connecting rods, 8 big nuts one,
9 A-frames one, 10 big nuts two, 11 primary nuts, 12 pull rods, 13 connecting rods two, 14 springs, 15 A-frames two, 16 pin runners,
17 rectangle sliding slots, 18 circular holes, 19 pins, 20 pin holes.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
Illustrate the implementation of the present invention by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Refering to attached drawing, structure, ratio, size etc. depicted in this specification institute accompanying drawings, only coordinating specification
Revealed content is not limited to the enforceable restriction item of the present invention so that those skilled in the art understands and reads
Part, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing
Under the effect of present invention can be generated and the purpose that can reach, it should all still fall and obtain and can contain in disclosed technology contents
In the range of lid.Meanwhile cited position restriction term in this specification, it is merely convenient to being illustrated for narration, rather than to
It limits the scope of the invention, relativeness is altered or modified, in the case where changing technology contents without essence, when being also considered as
The enforceable scope of the present invention.
Flange welding centering clamp structure provided by the present invention is as shown in Fig. 1, main body be divided into flange clamp system and
Pipeline clamp system two parts；Wherein flange clamp system is by latch hook 5, rack 6, long connecting rod 7, big nut 1, A-frame one
9, big nut 2 10 is constituted；Pipeline clamp system is by sliding support 1, connecting rod 1, eyelid retractor 3, connecting rod 34, rack 6, primary nut
11, pull rod 12, connecting rod 2 13, spring 14, A-frame 2 15 are constituted；
As shown in Fig. 1, flange clamping machine to flange for being fixed positioning, in the mechanism：Three latch hooks 5 pass through certainly
The rectangular sliding slot formation of the rectangular draw runner main body of body and the semi-open type of the circumference array in rack 6 is slidably matched, and makes latch hook 5 can be along
The rectangular sliding slot of semi-open type is free to slide；7 both ends of long connecting rod respectively with the hinge on the hinge and A-frame 1 at 5 back of latch hook
Connection, A-frame 1 is assemblied in the threaded post of 6 tail portion of rack, and can be slid axially along it；Big nut 1 and big nut
2 10 are coordinated by screw thread pair and the threaded post of 6 tail portion of rack, threaded post of the realization A-frame 1 in 6 tail portion of rack
On positioning.
As shown in Fig. 1, change A-frame 1 in 6 tail portion of rack by twisting big nut 1 and big nut 2 10
Threaded post on position, but realize three moving synchronously for latch hook 5 cylindrical surface on the outside of flange is clamped, realize flange
Clamp system makes flange center's axis be overlapped with toolholder central axis flange clamping and positioning in clamping process, realizes
The centering of flange and fixture.
As shown in Figure 1 and Figure 2, it is main as flange clamp system that positioning is fixed to pipeline in pipeline clamp system
Body is still rack 6, and sliding support 1 is coordinated by cylindrical spline sliding slot and the cylinder slide bar on 6 head of rack, can be along its axis
To sliding, while abbreviation can not rotate in ensureing to slide between two components, and A-frame 2 15 is also in the same way
It is assemblied in rack；Connecting rod 1, eyelid retractor 3, connecting rod 2 13 and eyelid retractor 3, which are mutually connected by hinges 26, forms three groups of circumference
The end of three groups of four-bar mechanisms and A-frame 2 15 are connected through the hinge by the parallel four-bar linkage of array, connecting rod 34
Form the movable supporting push and pull system of circumference array.
As shown in Figures 2 and 3, the axle center of rack 6 is designed with perforative cylindrical cavity, and in the cylinder spline on head
The lateral layout of axis has the pin runner 16 of bar shaped；Pull rod 12 is assemblied in the axle center cylindrical empty intracavitary of rack 6, can slide along,
The head of pull rod 12 is connect by pin 19 with sliding support 1, and pin 19 runs through pin runner 16, and can be slided in pin runner 16
It is dynamic；Primary nut 11 is coordinated with pull rod 12 by screw thread pair, and spring is equipped between sliding support 1 and A-frame 2 15 and is used for
It resets.
As shown in Fig. 2, can be by pulling pull rod 12 to adjust position of the sliding support 1 relative to rack by turning primary nut 11
It sets, makes distance change of the eyelid retractor 3 relative to 6 axle center of rack in three groups of four-bar mechanisms, to be realized to pipe inside pipeline
The clamping in road；
During turning primary nut clamping pipe, parallel four-bar linkage ensure that eyelid retractor 3 and present clip
Axle center is parallel always, this make pipeline realized simultaneously during being clamped with it is of the invention in holder axis in；Due to method
It is blue to realize centering with the fixture in the present invention simultaneously in clamping process, so the present invention indirectly realizes flange and welded pipe
The centering in road operates.
During clamping pipe, since parallel―ordinal shift movement makes pipeline be existed simultaneously to during clamped
It is clamped the movement tendency of flange, this generates certain prestressing force to make pipeline end face on being tightly attached to flange face, keeps the two real
Now preferably contact, in addition after pipeline is clamped, if there is the trend to fall off backward, the parallel four-bar linkage in the present invention
It will produce the trend expanded outwardly simultaneously, frictional force increases when increasing the extruding force of eyelid retractor 3 and inside pipe wall, realizes friction self-locking
Prevent shedding.
As shown in Figure 4-8, it is parts thereof structural schematic diagram of the present invention, Fig. 4 is one structural schematic diagram of A-frame, by
Three hinges of torus and outside axial direction array are constituted, and torus can be set on the screw thread shell of column of rack 6 and threadingly column
Section sliding；Fig. 5 is two structural schematic diagram of A-frame, is also made of three hinges of torus and outside axial direction array, no
Same is that torus local array offers axial bar slot, has the cylinder slide bar section of spline to coordinate with the array with rack 6；Figure
6 be sliding support structural schematic diagram, and main body is hollow cylinder, and the local array of hollow cylinder offers axial bar
Slot has the cylinder slide bar section of spline to coordinate, is only capable of sliding axially without rotating, close on hollow with the array with rack 6
Equal array is further opened with pin hole 20 there are three hinge on sliding support lateral surface on the lateral surface at cylinder both ends；Fig. 7 is branch
It is U-shaped bar shaped groove body that one embodiment structural schematic diagram for supportting device 3, which is section, and both ends are equipped with hinge hole, in groove body
Bottom surface, which is gone into battle, shows the multiple kicks of two row, to increase the frictional force of eyelid retractor 3 and inner wall of the pipe；Fig. 8 is 12 structure of pull rod
Schematic diagram, one section are provided with the external screw thread coordinated with primary nut 11, and the end of the other end is equipped with pin 19, to be propped up with sliding
Pin hole 20 on frame 1 coordinates, and pull rod 12 and sliding support 1 are linked together.
As shown in Fig. 9, it is 5 structural schematic diagram of latch hook, each latch hook is by latch hook head, rectangular draw runner main body and back hinge
It constitutes.Hook side and main body sliding axis are acute angle on the inside of the coupler body of latch hook 5, and flange clamp system can be made in the process of clamping flange
Sliding of the middle limitation flange in jig main body axial direction, the common positioning for realizing flange with the outer surface of 6 rectangular sliding slot of rack.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection domain by appended claims and its
Equivalent defines.
Claims (2)
1. a kind of flange welding automatic centering fixture, which is characterized in that main body is divided into flange clamp system and pipeline clamp system
Two parts；Wherein flange clamp system by latch hook (5), rack (6), long connecting rod (7), big nut one (8), A-frame one (9),
Big nut two (10) is constituted, and the latch hook (5) totally three, each latch hook is by latch hook head, rectangular draw runner main body and back hinge structure
At the rack (6) is made of cylinder slide bar section and screw thread shell of column, is extended laterally there are three circumference array two sections of junctions
The rectangular sliding slot of semi-open type, the semi-open type that three latch hooks (5) pass through the circumference array in the rectangular draw runner main body of itself and rack (6)
Rectangular sliding slot formation is slidably matched, and keeps latch hook (5) free to slide along the rectangular sliding slot of semi-open type；Long connecting rod (7) totally three, often
The both ends of root respectively with the hinge connection on the hinge and A-frame one (9) at latch hook (5) back, A-frame one (9) assembly
In the threaded post of rack (6) tail portion, and it can slide axially along it；Big nut one (8) and big nut two (10) pass through screw thread pair
Coordinated with the threaded post of rack (6) tail portion, realizes positioning of the A-frame one (9) in the threaded post of rack (6) tail portion；
Pipeline clamp system is by sliding support (1), connecting rod one (2), eyelid retractor (3), connecting rod three (4), rack (6), primary nut
(11), pull rod (12), connecting rod two (13), spring (14), A-frame two (15) are constituted；The cylinder slide bar section of the rack (6)
Outer surface axial direction array has spline, offers the pin runner (16) of bar shaped, sliding support between two adjacent splines wherein
(1) it is set on the cylinder slide bar of rack (6), local array has the axial splines formula sliding slot with the spline fitted, makes cunning
Dynamic holder (1) can on the outside of the cylinder sliding bar of rack (6), sliding support (1) both ends each circumferential array there are three hinge,
Connecting rod one (2), eyelid retractor (3), connecting rod two (13) and sliding support (1) are mutually connected by hinges 26 into the flat of three groups of circumference array
Row four-bar mechanism, three connecting rods three (4) are by three eyelid retractors (3) close to the rectangular sliding slot of semi-open type of rack (6) circumference array
One end and A-frame two (15) be connected through the hinge to form the four-bar mechanism movable supporting push and pull system of circumference array, institute
State one end that A-frame two (15) is set in the rectangular sliding slot of close semi-open type of cylinder slide bar section；
The axle center of the rack (6) is designed with perforative cylindrical cavity, and the axle center that pull rod (12) is assemblied in rack (6) is cylindrical
In cavity, it can slide along, the head of pull rod (12) is connect by pin (19) with the pin hole (20) on sliding support (1),
Pin (19) runs through pin runner (16), and can the sliding in pin runner (16)；A part for pull rod (12) is equipped with external screw thread, small spiral shell
Female (11) are coordinated with pull rod (12) by screw thread pair, and primary nut (11) is for being resisted against rack (6) screw thread styletable to pull rod
(12) it is positioned, spring (14) is equipped between sliding support (1) and A-frame two (15) for resetting.
2. flange welding automatic centering fixture according to claim 1, which is characterized in that the eyelid retractor 3 is that section is U
The bar shaped groove body of type, both ends are equipped with hinge hole, go into battle in the bottom surface of groove body and show the multiple kicks of two row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833533.6A CN108637584B (en) | 2018-07-27 | 2018-07-27 | Automatic centering clamp for flange welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833533.6A CN108637584B (en) | 2018-07-27 | 2018-07-27 | Automatic centering clamp for flange welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108637584A true CN108637584A (en) | 2018-10-12 |
| CN108637584B CN108637584B (en) | 2020-08-18 |
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ID=63760233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810833533.6A Active CN108637584B (en) | 2018-07-27 | 2018-07-27 | Automatic centering clamp for flange welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108637584B (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253337A (en) * | 2018-11-23 | 2019-01-22 | 中铁局集团有限公司 | A kind of fast mounting pipe joint device and advanced tubule construction method |
| CN110497125A (en) * | 2019-07-09 | 2019-11-26 | 四川艾普耐斯油气工程服务有限公司 | A kind of dovetail section formula flange abutting joint device |
| CN110757054A (en) * | 2019-09-20 | 2020-02-07 | 中国航发航空科技股份有限公司 | Welding device for casing diffuser shell assembly |
| CN111152133A (en) * | 2020-01-13 | 2020-05-15 | 宁梅 | Automatic feeding device for polishing of outer ring of pipe |
| CN111515572A (en) * | 2020-05-15 | 2020-08-11 | 吴璇 | Production and manufacturing process of chemical storage tank |
| CN111958441A (en) * | 2020-08-12 | 2020-11-20 | 王恩童 | Lifting mechanism for vertical grinding machine grinding tool |
| CN112007999A (en) * | 2020-08-18 | 2020-12-01 | 浙江大学 | Centering and clamping device for bending and forming flange pipe fitting |
| CN112276401A (en) * | 2020-11-02 | 2021-01-29 | 岳西十行机械设备有限公司 | Adjusting mechanism for welding clamping fixture |
| CN112388856A (en) * | 2020-11-09 | 2021-02-23 | 钱祥斌 | Fixing device is used in quartz glass tube processing |
| CN112427815A (en) * | 2020-10-26 | 2021-03-02 | 南京华锻智能装备科技有限公司 | Integrated efficient laser pipe cutting machine |
| CN112453821A (en) * | 2021-01-26 | 2021-03-09 | 菲格瑞特（苏州）汽车科技有限公司 | Clamping device for automobile parts |
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| CN112658581A (en) * | 2020-12-14 | 2021-04-16 | 凯络文换热器（中国）有限公司 | Pipe fitting fixed-position welding anchor clamps |
| CN112894252A (en) * | 2021-01-26 | 2021-06-04 | 合肥实华管件有限责任公司 | Hydrogen production device pressure-bearing pipeline welding group is to frock |
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| CN114012330A (en) * | 2021-11-30 | 2022-02-08 | 青岛嘉恒新能源设备有限公司 | Inner and outer circular seam welding equipment for large steel pipe connecting flange |
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| CN117506321A (en) * | 2024-01-04 | 2024-02-06 | 西安奥若特材料技术有限公司 | Pipeline welding positioning device for aero-engine |
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Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253337A (en) * | 2018-11-23 | 2019-01-22 | 中铁局集团有限公司 | A kind of fast mounting pipe joint device and advanced tubule construction method |
| CN110497125A (en) * | 2019-07-09 | 2019-11-26 | 四川艾普耐斯油气工程服务有限公司 | A kind of dovetail section formula flange abutting joint device |
| CN110757054A (en) * | 2019-09-20 | 2020-02-07 | 中国航发航空科技股份有限公司 | Welding device for casing diffuser shell assembly |
| CN111152133A (en) * | 2020-01-13 | 2020-05-15 | 宁梅 | Automatic feeding device for polishing of outer ring of pipe |
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Effective date of registration: 20200723 Address after: Room 08, 3 / F, supporting complex building, phase I, Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province, 412000 Applicant after: Hunan Dingrui Machinery Co., Ltd Address before: 261061 unit 601, building 19, Fenghuang villa, Kuiwei Development Zone, Weifang, Shandong. Applicant before: Liu Fangyuan |
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