CN111360481A - Large-scale penstock stiffening ring welding device - Google Patents
Large-scale penstock stiffening ring welding device Download PDFInfo
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- CN111360481A CN111360481A CN202010284342.6A CN202010284342A CN111360481A CN 111360481 A CN111360481 A CN 111360481A CN 202010284342 A CN202010284342 A CN 202010284342A CN 111360481 A CN111360481 A CN 111360481A
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- 238000003466 welding Methods 0.000 title claims abstract description 105
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims description 25
- 230000007306 turnover Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 7
- 239000010720 hydraulic oil Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007778 shielded metal arc welding Methods 0.000 description 1
- 238000012360 testing method Methods 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
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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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
-
- 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
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- Arc Welding In General (AREA)
Abstract
The invention discloses a large-scale pressure steel pipe stiffening ring welding device which comprises a supporting frame, wherein the supporting frame comprises a horizontal part and a vertical part which are connected; the horizontal part includes annular fixed part and with the annular fixed part links to each other and is the flexible arm of many bearing rollers of radial arrangement, each the flexible arm of bearing roller is provided with the bearing roller respectively, the bearing roller is used for forming the support with pressure steel pipe's terminal surface looks butt so that to pressure steel pipe. The device comprises a hydraulic oil cylinder, a roller frame, a self-made carrier roller and the like, wherein other steel structures are assembled by using steel pipe factory equipment and tools, and the design considers the field construction condition reasonably at the beginning, so that the device is stable and reliable in the process of turning over the steel pipe. Welding rate can be effectively improved in the welding process, the overturning working condition is completed by a hydraulic oil cylinder, the rotating working condition is completed by a roller carrier matched with a carrier roller, and the device can be overturned and rotated. The device can be suitable for pressure steel pipes with different diameters.
Description
Technical Field
The invention relates to the technical field of welding auxiliary equipment, in particular to a large-scale pressure steel pipe stiffening ring welding device.
Background
In recent years, with the rapid development of national socioeconomic, the scale of the power grid is continuously enlarged, the peak regulation capacity of the power grid mainly based on traditional thermal power is lack, and the construction of a high-water-head pumped storage power station is accelerated due to the rapid development of new energy sources according to the requirements of national power grid economic operation and power grid structure adjustment. Penstock diversion adopts a relatively common diversion mode in the construction of pumped storage power stations, concentrates all water heads of the hydropower stations in the diversion process, has steep gradient and large internal water pressure, and the buried penstock pipelines are designed with stiffening rings to improve the stability of external pressure resistance so as to improve the safety coefficient of the penstock pipelines.
Stiffening rings are typically provided in multiple passes, while stiffening rings typically have long fillet welds. For example, the single-section pipe joint of the water diversion tunnel section of the stiffening ring of the Shandong Yimeng pumped storage power station is provided with 4 stiffening rings, the single-section pipe joint of the vertical shaft section is provided with 3 stiffening rings, the single-section steel pipe of the lower horizontal section is provided with 2 stiffening rings, and most of the vertical shaft section and the lower horizontal section adopt high-strength steel with high standard tensile strength. The length of the fillet weld of a single section of steel pipe is long, if the traditional shielded metal arc welding method is long in time consumption and large in manpower and material resource investment, the problem of delaying the manufacturing progress of the pressure steel pipe is easily caused.
In the production process of large-sized pressure steel pipes, the fillet weld of the stiffening ring welded by submerged arc welding is widely applied to actual production, but in the fillet weld process of large-sized pressure steel pipes welded by submerged arc welding, problems exist to different degrees, for example, two sides of the fillet weld of the stiffening ring need to be welded in the welding process, which means that the steel pipe must be turned over in the welding process. And the fillet weld of the stiffening ring is processed by oblique fillet welding in the production process of the pressure steel pipe, the welding quality can not be effectively ensured, and then the steel pipe with the tonnage of 20t and the diameter of about 6m can not be welded by the conventional positioner device.
Disclosure of Invention
The invention provides a welding device for a stiffening ring of a large-sized pressure steel pipe. The utility model provides a simple structure, rotatable, can overturn, be convenient for operation and can effectively improve stiffening ring fillet weld ship shape welding speed, reduce the input of stiffening ring fillet weld welding manpower, material resources.
The invention provides the following scheme:
the utility model provides a large-scale penstock stiffening ring welding set, includes:
the supporting frame comprises a horizontal part and a vertical part which are connected; the horizontal part comprises an annular fixing part and a plurality of carrier roller telescopic arms which are connected with the annular fixing part and radially arranged, carrier rollers are respectively arranged on the carrier roller telescopic arms, and the carrier rollers are used for abutting against the end surface of the pressure steel pipe so as to support the pressure steel pipe; the vertical part is connected with the annular fixing part through a vertical part telescopic arm;
the roller mechanism comprises a roller bracket connected with the vertical part, a roller connected with the roller bracket and a rotary driving component for driving the roller to rotate; the surface of the roller is used for abutting against the outer side pipe wall of the pressure steel pipe;
the turnover mechanism is hinged with the lower part of the annular fixing part;
and the welding operation mechanism is used for welding the fillet weld of the stiffening ring after the angle adjustment relative to the pressure steel pipe is finished.
Preferably: the turnover mechanism comprises a base and a hydraulic system, and the base is hinged with the lower part of the annular fixing part through an ear plate assembly; the oil cylinder of the hydraulic system is hinged with the base, the piston rod of the hydraulic system is hinged with the lower part of the annular fixing part, and the hydraulic system is used for providing turning power for the supporting frame, so that one end, far away from the vertical part, of the horizontal part is lifted upwards.
Preferably: and the oil cylinder of the hydraulic system is a self-locking hydraulic oil cylinder.
Preferably: the rotary drive assembly includes an electric drive.
Preferably: the welding operation mechanism comprises a welding operation platform, and an adjustable welding arm is arranged on the welding operation platform.
Preferably: and the adjustable welding arm is provided with automatic submerged arc welding equipment.
Preferably: the welding preheating device is characterized by further comprising a welding preheating heater, wherein the welding preheating heater is arranged on one side of the horizontal part through a support.
Preferably: the welding preheating heater is a far infrared heater or a gas preheater.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the invention, the welding device for the stiffening ring of the large-sized pressure steel pipe can be realized, and in an implementation mode, the welding device can comprise a supporting frame, wherein the supporting frame comprises a horizontal part and a vertical part which are connected; the horizontal part comprises an annular fixing part and a plurality of carrier roller telescopic arms which are connected with the annular fixing part and radially arranged, carrier rollers are respectively arranged on the carrier roller telescopic arms, and the carrier rollers are used for abutting against the end surface of the pressure steel pipe so as to support the pressure steel pipe; the vertical part is connected with the annular fixing part through a vertical part telescopic arm; the roller mechanism comprises a roller bracket connected with the vertical part, a roller connected with the roller bracket and a rotary driving component for driving the roller to rotate; the surface of the roller is used for abutting against the outer side pipe wall of the pressure steel pipe; the turnover mechanism is hinged with the lower part of the annular fixing part; and the welding operation mechanism is used for welding the fillet weld of the stiffening ring after the angle adjustment relative to the pressure steel pipe is finished. The application provides a large-scale penstock stiffening ring welding set comprises hydraulic cylinder, gyro wheel frame, self-control bearing roller etc. and all the other steel construction all use steel pipe factory equipment and multiplexer utensil to assemble the completion, and the site operation condition has been considered rationally at the beginning of the design, makes the device stand up the in-process at the steel pipe steady reliable. Welding rate can be effectively improved in the welding process, the overturning working condition is completed by a hydraulic oil cylinder, the rotating working condition is completed by a roller carrier matched with a carrier roller, and the device can be overturned and rotated. The device can be suitable for pressure steel pipes with different diameters.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a top view of a large-scale stiffening ring welding device for pressure steel pipes according to an embodiment of the present invention;
FIG. 2 is a top view of a large stiffening ring welding device for pressure steel pipes with pressure steel pipes placed thereon according to an embodiment of the present invention;
FIG. 3 is a front view of a large-scale stiffening ring welding device for pressure steel pipes according to an embodiment of the present invention;
FIG. 4 is a front view of a welding status of a large-sized stiffening ring welding device for pressure steel pipes according to an embodiment of the present invention.
In the figure: the device comprises a support frame 1, an annular fixing part 11, a carrier roller telescopic arm 12, a vertical part 13, a vertical part telescopic arm 14, a carrier roller 2, a roller mechanism 3, a base 41, a hydraulic system 42, an ear plate assembly 43, a welding operation platform 51, an adjustable welding arm 52, submerged arc welding automatic welding equipment 53, a welding preheating heater 6, a support 7, a pressure steel pipe 8 and a stiffening ring 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Examples
Referring to fig. 1, 2, 3, and 4, a large-sized stiffening ring welding device for pressure steel pipes according to an embodiment of the present invention is shown in fig. 1, 2, 3, and 4, and includes a supporting frame 1, where the supporting frame 1 includes a horizontal portion and a vertical portion connected to each other; the horizontal part comprises an annular fixing part 11 and a plurality of carrier roller telescopic arms 12 which are connected with the annular fixing part 11 and are radially arranged, carrier rollers 2 are respectively arranged on the carrier roller telescopic arms 12, and the carrier rollers 2 are used for abutting against the end surface of the pressure steel pipe 8 so as to support the pressure steel pipe 8; the vertical part 13 is connected with the annular fixing part 11 through a vertical part telescopic arm 14; the horizontal part and the vertical part of the support frame that this application provided all have extending structure, and extending structure's setting can guarantee that this support frame can be used for bearing the penstock who does not use the diameter. When the support frame is used, the telescopic arm of the carrier roller is firstly adjusted according to the diameter of the pressure steel pipe, the telescopic adjustment of the telescopic arm ensures that the carrier roller can be abutted against the end face of the pressure steel pipe, and then the telescopic arm of the vertical part is adjusted to ensure that the roller can be abutted against the side wall of the pressure steel pipe. The application provides a flexible arm can adopt the mode of major diameter arm section suit minor diameter arm section to realize flexible, also can adopt the flexible arm that can realize among other prior art, can also adopt the automatic flexible arm that has power unit to further reduce workman's working strength.
The roller mechanism 3 comprises a roller bracket, a roller and a rotary driving component, wherein the roller bracket is connected with the vertical part 13, the roller is connected with the roller bracket, and the rotary driving component is used for driving the roller to rotate; the surface of the roller is used for abutting against the outer side pipe wall of the pressure steel pipe 8; in particular, the rotary drive assembly comprises an electric drive.
The turnover mechanism is hinged with the lower part of the annular fixing part 11; specifically, the turnover mechanism comprises a base 41 and a hydraulic system 42, wherein the base 41 is hinged with the lower part of the annular fixing part 11 through an ear plate assembly 43; the oil cylinder of the hydraulic system 42 is hinged to the base 41, the piston rod of the hydraulic system 42 is hinged to the lower portion of the annular fixing portion 11, and the hydraulic system 42 is used for providing turning power to the supporting frame, so that one end, away from the vertical portion, of the horizontal portion is lifted upwards. In order to ensure the safety during welding, the oil cylinder of the hydraulic system is a self-locking hydraulic oil cylinder.
And the welding operation mechanism is used for welding the fillet weld of the stiffening ring after the angle adjustment relative to the pressure steel pipe is finished. Specifically, the welding operation mechanism comprises a welding operation platform 51, and an adjustable welding arm 52 is arranged on the welding operation platform 51. And an automatic submerged arc welding device 53 is arranged on the adjustable welding arm 52. In order to realize preheating before welding the stiffening ring, the welding device further comprises a welding preheating heater 6, and the welding preheating heater 6 is arranged on one side of the horizontal part through a support 7. The welding preheating heater is a far infrared heater or a gas preheater.
The application provides a can overturn, rotatable welding profile shifting mechanism, can effectively accomplish the welding of penstock fillet weld, realizes that penstock preparation welding processes is whole automatic. The device comprises a support frame and a turnover mechanism, wherein an oil pump controls a hydraulic oil cylinder to provide turnover force for the turnover mechanism. The welding roller mechanism comprises a roller frame and a carrier roller, wherein the roller frame provides driving force for the pressure steel pipe to rotate at a constant speed, the carrier roller rotates for supporting the steel pipe, and the roller of the roller frame is driven by electric power. And the welding manipulator mechanism is used for welding the angle weld when the welding arm of the welding manipulator mechanism is well adjusted in an adjustable range and is positioned on the pressure steel pipe. The device can turn the steel pipe by 0-90 degrees. The roller carrier is used for providing rolling force for the welded pressure steel pipe when the equipment works, and the steel pipe is driven to do circular motion by the rotation of the rollers through friction force. The height and the length of the welding arm of the welding manipulator can be adjusted to be suitable for various pressure steel pipes with different sizes, and the welding mode of the welding manipulator is submerged arc welding. When the position of the welding arm and the pressure steel pipe is adjusted in the adjustable range, the welding arm can weld a welding seam, and as shown in fig. 4, the steel pipe is in a 45-degree state during welding and performs rotary motion. After one side is welded, the steel pipe is turned to a 90-degree state, then the steel pipe is placed on the turning frame in a 180-degree rotating mode through the hoisting equipment, the steel pipe is turned to a 45-degree state again, and a welding seam on the other side is welded.
Through using the large-scale penstock stiffening ring welding set that this application provided, carry out stiffening ring fillet weld welding test in the manufacturing and construction process of the shandong Yimeng pumped storage power station penstock, its function and performance homoenergetic can effectually satisfy the construction technical requirement, have realized stiffening ring fillet weld ship shape welding automatic weld, make the stiffening ring welding change to the control operation that becomes more meticulous by high strength labor, the welding seam shaping is pleasing to the eye, has reduced intensity of labour when having improved operation quality.
In a word, the large-scale penstock stiffening ring welding set that this application provided comprises hydraulic cylinder, gyro wheel frame, self-control bearing roller etc. and all other steel construction use steel pipe factory equipment and multiplexer utensil to assemble the completion, and the site operation condition has been considered rationally at the beginning of the design, makes the device steady reliable at the steel pipe in-process that stands up. Welding rate can be effectively improved in the welding process, the overturning working condition is completed by a hydraulic oil cylinder, the rotating working condition is completed by a roller carrier matched with a carrier roller, and the device can be overturned and rotated. The device can be suitable for pressure steel pipes with different diameters.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a large-scale penstock stiffening ring welding set which characterized in that includes:
the supporting frame comprises a horizontal part and a vertical part which are connected; the horizontal part comprises an annular fixing part and a plurality of carrier roller telescopic arms which are connected with the annular fixing part and radially arranged, carrier rollers are respectively arranged on the carrier roller telescopic arms, and the carrier rollers are used for abutting against the end surface of the pressure steel pipe so as to support the pressure steel pipe; the vertical part is connected with the annular fixing part through a vertical part telescopic arm;
the roller mechanism comprises a roller bracket connected with the vertical part, a roller connected with the roller bracket and a rotary driving component for driving the roller to rotate; the surface of the roller is used for abutting against the outer side pipe wall of the pressure steel pipe;
the turnover mechanism is hinged with the lower part of the annular fixing part;
and the welding operation mechanism is used for welding the fillet weld of the stiffening ring after the angle adjustment relative to the pressure steel pipe is finished.
2. The welding device for the stiffening rings of the large-sized pressure steel pipe as claimed in claim 1, wherein the turnover mechanism comprises a base and a hydraulic system, and the base is hinged with the lower part of the annular fixing part through an ear plate assembly; the oil cylinder of the hydraulic system is hinged with the base, the piston rod of the hydraulic system is hinged with the lower part of the annular fixing part, and the hydraulic system is used for providing turning power for the supporting frame, so that one end, far away from the vertical part, of the horizontal part is lifted upwards.
3. A large-scale penstock stiffening ring welding device as defined in claim 2, wherein the cylinders of the hydraulic system are self-locking hydraulic cylinders.
4. The large pressure steel pipe stiffening ring welding apparatus according to claim 1, wherein the rotary driving assembly comprises an electric driver.
5. The welding device for the stiffening ring of the large-sized pressure steel pipe as claimed in claim 1, wherein the welding operation mechanism comprises a welding operation platform, and an adjustable welding arm is arranged on the welding operation platform.
6. A large-scale pressure steel pipe stiffening ring welding device according to claim 5, characterized in that the adjustable welding arm is provided with an automatic submerged arc welding device.
7. The welding device for the stiffening rings of the large pressure steel pipe as claimed in claim 1, further comprising a welding preheating heater disposed at one side of the horizontal portion by a bracket.
8. The welding device for the stiffening rings of the large pressure steel pipe as claimed in claim 7, wherein the welding preheating heater is a far infrared heater or a gas preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284342.6A CN111360481A (en) | 2020-04-13 | 2020-04-13 | Large-scale penstock stiffening ring welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284342.6A CN111360481A (en) | 2020-04-13 | 2020-04-13 | Large-scale penstock stiffening ring welding device |
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| CN111360481A true CN111360481A (en) | 2020-07-03 |
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| CN202010284342.6A Pending CN111360481A (en) | 2020-04-13 | 2020-04-13 | Large-scale penstock stiffening ring welding device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112958986A (en) * | 2021-02-08 | 2021-06-15 | 中国铁建重工集团股份有限公司 | Steel pipe ring overturning tool |
| CN113001092A (en) * | 2021-02-02 | 2021-06-22 | 中国水电四局（兰州）机械装备有限公司 | Six-equal-division steel pipe stiffening ring assembling equipment |
| CN113231775A (en) * | 2021-04-21 | 2021-08-10 | 中国水电四局（兰州）机械装备有限公司 | Pressure steel pipe stiffening ring installation fixing device |
| CN113751915A (en) * | 2021-10-13 | 2021-12-07 | 北京好运达智创科技有限公司 | Stiffening ring welding equipment |
| CN114178730A (en) * | 2021-12-28 | 2022-03-15 | 北京好运达智创科技有限公司 | Stiffening ring welding equipment |
| CN114619200A (en) * | 2022-04-27 | 2022-06-14 | 中铁七局集团有限公司 | Centering device for pressure steel pipe welding stiffening ring and welding system |
| CN115401290A (en) * | 2022-09-23 | 2022-11-29 | 中铁一局集团有限公司 | Automatic welding device for annular seam of steel pipe in chamber lining |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113001092A (en) * | 2021-02-02 | 2021-06-22 | 中国水电四局（兰州）机械装备有限公司 | Six-equal-division steel pipe stiffening ring assembling equipment |
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| CN113231775A (en) * | 2021-04-21 | 2021-08-10 | 中国水电四局（兰州）机械装备有限公司 | Pressure steel pipe stiffening ring installation fixing device |
| CN113751915A (en) * | 2021-10-13 | 2021-12-07 | 北京好运达智创科技有限公司 | Stiffening ring welding equipment |
| CN114178730A (en) * | 2021-12-28 | 2022-03-15 | 北京好运达智创科技有限公司 | Stiffening ring welding equipment |
| CN114619200A (en) * | 2022-04-27 | 2022-06-14 | 中铁七局集团有限公司 | Centering device for pressure steel pipe welding stiffening ring and welding system |
| CN114619200B (en) * | 2022-04-27 | 2023-10-20 | 中铁七局集团有限公司 | Centering device and welding system for welding stiffening ring of pressure steel pipe |
| CN115401290A (en) * | 2022-09-23 | 2022-11-29 | 中铁一局集团有限公司 | Automatic welding device for annular seam of steel pipe in chamber lining |
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