CN114055045B - Welding device for longitudinal seam of tower barrel - Google Patents
Welding device for longitudinal seam of tower barrel Download PDFInfo
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- CN114055045B CN114055045B CN202111288269.0A CN202111288269A CN114055045B CN 114055045 B CN114055045 B CN 114055045B CN 202111288269 A CN202111288269 A CN 202111288269A CN 114055045 B CN114055045 B CN 114055045B
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- 238000003466 welding Methods 0.000 title claims abstract description 121
- 230000008093 supporting effect Effects 0.000 claims abstract description 82
- 238000007493 shaping process Methods 0.000 claims abstract description 27
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 35
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 35
- 241001330002 Bambuseae Species 0.000 claims description 35
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 35
- 239000011425 bamboo Substances 0.000 claims description 35
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 1
- 230000007306 turnover Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
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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
- B23K37/0426—Fixtures for other work
-
- 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
-
- 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
- B23K2101/12—Vessels
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The tower longitudinal seam welding device comprises a gantry welding frame and a tower bracket, wherein the gantry welding frame comprises a welding frame main body, a welding frame axial driving device, a lifting plate frame and a plate frame lifting device; the tower bracket comprises a base, a tower bracket and a tower end supporting device, wherein a positioning device for a tower longitudinal seam is arranged between the gantry welding frame and the tower end supporting device, the positioning device is a laser positioning device or an infrared positioning device, a tower carrier roller is arranged at the top of the tower bracket, the tower end supporting device comprises a supporting piece axial moving device and a supporting piece, and an annular supporting shaping groove corresponding to the tower end is formed in the supporting piece. The welding device has the advantages of convenience in welding operation, high roundness of the tower, few rounding operations, omission of rounding operation steps and the like, and can greatly improve the welding quality and the welding efficiency of the tower.
Description
Technical Field
The invention relates to a tower longitudinal seam welding device, and belongs to the technical field of large-scale cylinder longitudinal seam welding equipment.
Background
The wind power tower is generally composed of a conical tube type steel tower barrel with the radial length of 3-7 m and the single-section axial length of 20-30 m, and the tower barrel with the length of 20-30 m is formed by axially splicing minimum tower barrel units with the length of at least 2-4 m, and has the characteristics of large diameter and long length.
In the prior art, when manufacturing the minimum unit of the tower, a straight steel plate is firstly cut, then the cut steel plate is bent in an arc shape for many times, the head and tail edges of the bent steel plate are preliminarily welded to form a cylinder, and then the cylinder formed by preliminary welding is moved to a special electric welding machine to respectively weld a longitudinal seam and a circular seam of the cylinder. Because the steel plate is not additionally provided with a reinforcing structure, the side wall of the cylinder can fall down due to gravity if the cylinder is transversely placed, so that an elliptical-like cylinder is formed. If the traditional welding device is still adopted to directly weld the steel plates at two sides of the welding seam, ideal connection of the steel plates at two sides of the welding seam is difficult to realize, and the situation that the bending angle of the steel plates at two sides of the welding seam is overlarge, so that the circle of the welding seam of the tower is difficult to return, even the circle is difficult to return, and defective products are directly caused.
In addition, in the prior art, the inner side of the longitudinal seam of the tower barrel is welded at the bottom, and then the longitudinal seam of the tower barrel is rotated to the top for welding, and the welding mode can easily realize the welding of the inner side of the longitudinal seam, but after the welding seam is rotated to the top, the side wall of the tower barrel still falls down to form an oval cylinder due to poor structural stability of the tower barrel, meanwhile, shaking still occurs continuously, and the purposes that the bending angle of two steel plates at the welding seam welding position is overlarge and the positioning is difficult to realize rapidly and automatically exist. At present, manual positioning is generally only adopted, but the manual positioning is difficult to operate, and time and labor are wasted.
That is, when the welding tower drum longitudinal seam is inside, the welding machine trolley is manually pushed into the welding tower drum, and the welding is performed after manual centering, so that the defect of complicated welding operation process is also overcome.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a tower longitudinal seam welding device which adopts a combination of a gantry welding frame with good structural stability and large bearing, a tower bracket with a tower end supporting device and an automatic pushing mechanism of a welding trolley, can realize the procedures of automatic positioning of the longitudinal seam, supporting of the inner side and the outer side of the tower, automatic welding and the like, and has the advantages of convenient welding operation, high roundness of the tower, less rounding operation, even omitting rounding operation steps and the like, and can greatly improve the welding quality and the welding efficiency of the tower.
The technical aim of the invention is realized by the following technical scheme:
the tower longitudinal seam welding device comprises a gantry welding frame and a tower bracket, wherein the gantry welding frame comprises a welding frame main body, a welding frame axial driving device, a lifting plate frame with a welding machine and a plate frame lifting device; the tower bracket comprises a base, a tower bracket and a tower end supporting device, wherein the tower bracket and the tower end supporting device are arranged on the base, the tower end supporting device and the gantry welding frame are respectively positioned at two axial ends of the tower, and positioning devices related to longitudinal seams of the tower are arranged on the gantry welding frame and the tower end supporting device and are laser positioning devices or infrared positioning devices; the top of the tower barrel bracket is provided with a tower barrel carrier roller, and the rotation of the tower barrel carrier roller is driven by an electric control power device; the tower cylinder end supporting device comprises a supporting piece axial moving device and a supporting piece, and an annular supporting and shaping groove corresponding to the tower cylinder end is arranged on the supporting piece; when the positioning device detects that the longitudinal seam of the tower barrel rotates to the top position under the drive of the tower barrel carrier roller, the tower barrel end supporting device moves towards the direction of the tower barrel until the annular supporting and shaping groove on the tower barrel end supporting device is embedded with the end part of the tower barrel, so that the end part of the tower barrel is supported. When the support piece completes the limit of the tower, the gantry welding frame axially moves to the position of the tower, and the plate frame lifting device moves the welding machine downwards to the position of the longitudinal seam of the tower, so that the welding of the outer side of the longitudinal seam of the tower is realized.
Through adopting above-mentioned technical scheme, provide a tower section of thick bamboo longitudinal joint welding set, this tower section of thick bamboo longitudinal joint welding set adopts stability good, the combination of the big planer-type welding frame of bearing and the tower section of thick bamboo bracket of taking tower section of thick bamboo end support device, can realize the automatic positioning of longitudinal joint at the top, the inside and outside support of tower section of thick bamboo and the automatic welding in tower section of thick bamboo longitudinal joint outside etc. process, this welding set has welding operation convenience, tower section of thick bamboo welding quality height, welding quality height's advantage.
The invention is further provided with: the support piece is a cylinder transversely fixed on the support piece axial moving device, the annular support shaping groove is formed in the end face, close to the tower, of the support piece, an axial channel is formed in the lower side face of the inner hole of the support piece, a welding trolley is arranged on the inner side of a longitudinal seam of the tower and arranged on the outer side of the axial channel of the support piece, an axial pushing mechanism is arranged on the support piece axial moving device and used for the welding trolley, the axial pushing mechanism can axially smoothly enter and exit the axial channel under the action of the axial pushing mechanism, the upper surface of the first pushing plate is an arc-shaped curved surface equal to the radius of the tower, and the upper surface of the first pushing plate is equal to the lower surface of the inner hole of the tower. After the outside welding of tower section of thick bamboo longitudinal joint finishes, support piece is rolled back and is separated with the tower section of thick bamboo, and tower section of thick bamboo bearing roller overturn 180 with the tower section of thick bamboo, makes the longitudinal joint reach minimum position, and at this moment, axial pushing mechanism pushes the tip to the tower section of thick bamboo with first push plate, and the welding trolley diameter on the first push plate moves axially straight, accomplishes the welding to the tower section of thick bamboo longitudinal joint inboard.
Through adopting above-mentioned technical scheme, provide one kind both can support the inside and outside side of a tower section of thick bamboo when welding, make things convenient for the welding dolly to accomplish the scheme of carrying out the welding to the inboard of a tower section of thick bamboo longitudinal joint again, this scheme can guarantee the welding quality of a tower section of thick bamboo, can greatly accelerate the welding operation of tower section of thick bamboo longitudinal joint inboard again.
The invention is further provided with: the axial pushing mechanism comprises a second pushing plate and an electric push rod, the body of the electric push rod is fixed on the supporting piece axial moving device, the second pushing plate is fixed on a telescopic rod of the electric push rod, and the first pushing plate is fixed on the second pushing plate.
By adopting the technical scheme, a specific scheme related to the axial pushing mechanism is provided.
The invention is further provided with: the other end of the tower is also provided with a tower end supporting device, when the positioning device detects that the longitudinal seam of the tower reaches the top position, the two tower end supporting devices move in opposite directions and are respectively jogged with the two ends of the tower to respectively support the two ends of the tower.
Through adopting above-mentioned technical scheme, also add tower section of thick bamboo end strutting arrangement at the other end of tower section of thick bamboo, the device can effectively guarantee that the tower section of thick bamboo remains higher circularity throughout in the welding process, can effectively improve tower section of thick bamboo welding quality.
The invention is further provided with: the annular support shaping groove is a groove with wide opening and narrow groove bottom, the diameter of the inner side opening edge of the annular support shaping groove is smaller than the inner diameter of Yu Datong, and the diameter of the outer side opening edge of the annular support shaping groove is larger than the outer diameter of Yu Datong.
By adopting the technical scheme, the concrete structure of the annular supporting and shaping groove is further limited, and the annular supporting and shaping groove of the structure has the advantage of convenience in embedding with the tower barrel.
The invention is further provided with: the top of the support piece is provided with an axial strip-shaped opening corresponding to the longitudinal seam of the tower barrel.
Through adopting above-mentioned technical scheme, set up the axial bar opening that corresponds with tower section of thick bamboo longitudinal joint nature at support piece top, can realize the complete welding to the tower section of thick bamboo longitudinal joint axial direction as far as possible when guaranteeing to the tower section of thick bamboo supporting effect.
The invention has the main beneficial effects that:
1. the welding device for the longitudinal seam of the tower barrel adopts the combination of the gantry welding frame with good stability and large bearing and the tower barrel bracket with the tower barrel end supporting device, can realize the procedures of automatic positioning of the longitudinal seam at the top, supporting the inner side and the outer side of the tower barrel, automatic welding of the outer side of the longitudinal seam of the tower barrel and the like, and has the advantages of convenient welding operation, high welding quality of the tower barrel and high welding quality;
2. the scheme can support the inner side and the outer side of the tower barrel during welding, is convenient for the welding trolley to automatically finish welding the inner side of the longitudinal seam of the tower barrel, can ensure the welding quality of the tower barrel, and can greatly accelerate the welding operation of the inner side of the longitudinal seam of the tower barrel;
3. according to the invention, the tower barrel end supporting devices are arranged at the two ends of the tower barrel, and the welding quality can be effectively ensured by supporting the two ends of the tower barrel;
4. the annular supporting and shaping groove is a groove with wide opening and narrow groove bottom, the diameter of the opening edge at the inner side of the annular supporting and shaping groove is smaller than the inner diameter of Yu Datong, the diameter of the opening edge at the outer side of the annular supporting and shaping groove is larger than the outer diameter of Yu Datong, the annular supporting and shaping groove of the structure has the advantage of being convenient to be embedded with a tower barrel, and meanwhile, the annular supporting and shaping groove of the structure can also realize supporting and shaping of more tower barrels with more specifications and has good universality;
5. according to the invention, the top of the supporting piece is provided with the axial strip-shaped opening corresponding to the longitudinal seam of the tower, so that the complete welding of the longitudinal seam of the tower in the axial direction can be realized as much as possible while the supporting effect of the tower is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a lateral structure immediately outside a longitudinal seam of a welded tower;
fig. 3 is a schematic side view of the support and welding carriage.
In the figure, 1, a welding frame main body; 3. lifting grillage; 4. welding machine; 5. a base; 6. a tower bracket; 7. a tower end supporting device; 8. a tower; 9. a tower roller; 10. a support axial movement device; 11. a support; 12. an annular supporting and shaping groove; 13. welding trolley; 14. a first support plate; 15. a second push plate; 16. an electric push rod; 17. an axial strip-shaped opening; 18. and (5) climbing a ladder.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Embodiment one:
as shown in fig. 1 and 2, the tower longitudinal seam welding device comprises a gantry welding frame and a tower bracket, wherein the gantry welding frame comprises a welding frame main body 1, a welding frame axial driving device, a lifting plate frame 3 with a welding machine 4 and a plate frame lifting device; the tower bracket comprises a base 5, a tower bracket 6 and a tower end supporting device 7 which are arranged on the base 5, wherein the tower end supporting device 7 and the gantry welding frame are respectively positioned at two axial ends of a tower 8, and positioning devices related to longitudinal seams of the tower 8 are arranged on the gantry welding frame and the tower end supporting device 7 and are laser positioning devices or infrared positioning devices; the top of the tower bracket 6 is provided with a tower roller 9, and the rotation of the tower roller 9 is driven by an electric control power device; the tower end supporting device 7 comprises a supporting piece axial moving device 10 and a supporting piece 11, and an annular supporting and shaping groove 12 corresponding to the end of the tower 8 is arranged on the supporting piece 11. The annular supporting and shaping groove 12 is a groove with wide opening and narrow groove bottom, the diameter of the inner side opening edge of the annular supporting and shaping groove 12 is smaller than the inner diameter of the tower 8, and the diameter of the outer side opening edge of the annular supporting and shaping groove 12 is larger than the outer diameter of the tower 8. The top of the support 11 is provided with an axial strip-shaped opening 17 corresponding to the longitudinal slit of the tower.
When the positioning device detects that the longitudinal seam of the tower barrel 8 rotates to the top position under the drive of the tower barrel carrier roller 9, the tower barrel end supporting device 7 moves towards the direction of the tower barrel 8 until the annular supporting and shaping groove 12 on the tower barrel end supporting device 7 is embedded with the end part of the tower barrel 8, and the end part of the tower barrel 8 is supported. After the outside welding of tower section of thick bamboo longitudinal joint finishes, support piece is rolled back and is separated with the tower section of thick bamboo, and tower section of thick bamboo bearing roller overturn 180 with the tower section of thick bamboo, makes the longitudinal joint reach minimum position, and at this moment, axial pushing mechanism pushes the tip to the tower section of thick bamboo with first push plate, and the welding trolley diameter on the first push plate moves axially straight, accomplishes the welding to the tower section of thick bamboo longitudinal joint inboard.
Embodiment two:
as shown in fig. 1 and 3, the difference between the second embodiment and the first embodiment is that the supporting member 11 is a cylinder transversely fixed on the supporting member axial moving device 10, the annular supporting and shaping groove 12 is arranged on the end surface of the supporting member 11, which is close to the tower 8, an axial channel is arranged on the lower side surface of the inner hole of the supporting member 11, a welding trolley 13 is arranged on the inner side of the longitudinal seam of the tower, the welding trolley 13 is arranged on the first pushing plate 14, an axial pushing mechanism is arranged on the supporting member axial moving device 10 for the welding trolley 13, the first pushing plate 14 can axially and smoothly enter and exit the axial channel under the action of the axial pushing mechanism, the upper surface of the first pushing plate 14 is an arc-shaped curved surface equal to the radius of the tower 8, and the upper surface of the first pushing plate 14 is equal to the lower surface of the inner hole of the tower 8. Specifically, the axial pushing mechanism includes a second pushing plate 15 and an electric push rod 16 whose body is fixed on the support member axial moving device 10, the second pushing plate 15 is fixed on a telescopic rod of the electric push rod 16, and the first pushing plate 14 is fixed on the second pushing plate 15.
When the welding device is used, after the outer side of the longitudinal seam of the tower barrel is welded, the supporting piece is retracted to be separated from the tower barrel, the tower barrel is overturned by 180 degrees by the tower barrel carrier roller, the longitudinal seam reaches the lowest position, at the moment, the axial pushing mechanism pushes the first pushing plate to the end part of the tower barrel, and the welding trolley on the first pushing plate moves in the radial direction and the axial direction to finish the welding of the inner side of the longitudinal seam of the tower barrel.
Embodiment III:
as shown in fig. 1 and 3, the third embodiment is different from the first and second embodiments in that a tower end supporting device 7 is also provided at the other end of the tower 8, and when the positioning device detects that the longitudinal seam of the tower 8 reaches the top position, the two tower end supporting devices 7 move in opposite directions, respectively engage with the two ends of the tower 8, and respectively support the two ends of the tower 8. At this time, the tower end supporting means 7 at the other end of the tower 8 may be the same as in the first embodiment or the second embodiment.
Claims (5)
1. Tower section of thick bamboo longitudinal joint welding set, its characterized in that: the welding machine comprises a gantry welding frame and a tower bracket, wherein the gantry welding frame comprises a welding frame main body (1), a welding frame axial driving device, a lifting plate frame (3) with a welding machine (4) and a plate frame lifting device; the tower bracket comprises a base (5), a tower bracket (6) and a tower end supporting device (7) which are arranged on the base (5), wherein the tower end supporting device (7) and the gantry welding frame are respectively positioned at two axial ends of the tower (8), positioning devices related to longitudinal seams of the tower (8) are arranged on the gantry welding frame and the tower end supporting device (7), and the positioning devices are laser positioning devices or infrared positioning devices; the top of the tower barrel bracket (6) is provided with a tower barrel carrier roller (9), and the rotation of the tower barrel carrier roller (9) is driven by an electric control power device; the tower cylinder end supporting device (7) comprises a supporting piece axial moving device (10) and a supporting piece (11), wherein an annular supporting and shaping groove (12) corresponding to the end part of the tower cylinder (8) is arranged on the supporting piece (11); when the positioning device detects that the longitudinal joint of the tower cylinder (8) rotates to the top position under the drive of the tower cylinder carrier roller (9), the tower cylinder end supporting device (7) moves towards the direction of the tower cylinder (8) until the annular supporting and shaping groove (12) on the tower cylinder end supporting device (7) is embedded with the end part of the tower cylinder (8) to support the end part of the tower cylinder (8); the support piece (11) be transversely fixed the drum on support piece axial displacement device (10), annular support design groove (12) set up on the terminal surface that support piece (11) is close to tower section of thick bamboo (8), the downside of support piece (11) hole is provided with axial passageway, the outside of support piece (11) axial passageway is provided with tower section of thick bamboo longitudinal joint inboard welding dolly (13), welding dolly (13) settle on first push plate (14), support piece axial displacement device (10) on be equipped with axial push mechanism for welding dolly (13), first push plate (14) can be under axial push mechanism's effect axial smoothly business turn over axial passageway, the upper surface of first push plate (14) is the arc curved surface equal with the radius of tower section of thick bamboo (8), the upper surface of first push plate (14) is equal with the lower surface of tower section of thick bamboo (8) hole.
2. The tower longitudinal seam welding apparatus of claim 1 wherein: the axial pushing mechanism comprises a second pushing plate (15) and an electric push rod (16) of which the body is fixed on the supporting piece axial moving device (10), the second pushing plate (15) is fixed on a telescopic rod of the electric push rod (16), and the first pushing plate (14) is fixed on the second pushing plate (15).
3. The tower longitudinal seam welding apparatus according to claim 1 or 2, wherein: the other end of the tower (8) is also provided with a tower end supporting device (7), when the positioning device detects that the longitudinal seam of the tower (8) reaches the top position, the two tower end supporting devices (7) move in opposite directions and are respectively embedded with the two ends of the tower (8), and the two ends of the tower (8) are respectively supported.
4. A tower longitudinal seam welding apparatus according to claim 3 wherein: the annular supporting and shaping groove (12) is a groove with wide opening and narrow groove bottom, the diameter of the inner side opening edge of the annular supporting and shaping groove (12) is smaller than the inner diameter of Yu Datong (8), and the diameter of the outer side opening edge of the annular supporting and shaping groove (12) is larger than the outer diameter of Yu Datong (8).
5. The tower longitudinal seam welding apparatus of claim 4 wherein: the top of the support piece (11) is provided with an axial strip-shaped opening (17) corresponding to the column longitudinal seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111288269.0A CN114055045B (en) | 2021-11-02 | 2021-11-02 | Welding device for longitudinal seam of tower barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111288269.0A CN114055045B (en) | 2021-11-02 | 2021-11-02 | Welding device for longitudinal seam of tower barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114055045A CN114055045A (en) | 2022-02-18 |
| CN114055045B true CN114055045B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111288269.0A Active CN114055045B (en) | 2021-11-02 | 2021-11-02 | Welding device for longitudinal seam of tower barrel |
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| CN (1) | CN114055045B (en) |
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