CN116079188A - Welding method for large-section butt-joint groove of inclined steel tower section - Google Patents
Welding method for large-section butt-joint groove of inclined steel tower section Download PDFInfo
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- CN116079188A CN116079188A CN202310224799.1A CN202310224799A CN116079188A CN 116079188 A CN116079188 A CN 116079188A CN 202310224799 A CN202310224799 A CN 202310224799A CN 116079188 A CN116079188 A CN 116079188A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 111
- 239000010959 steel Substances 0.000 title claims abstract description 111
- 238000003466 welding Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 39
- 210000001503 joint Anatomy 0.000 claims abstract description 25
- 230000007704 transition Effects 0.000 claims description 4
- 238000005094 computer simulation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 description 3
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- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 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
- B23K9/00—Arc welding or cutting
- B23K9/013—Arc cutting, gouging, scarfing or desurfacing
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention relates to a welding method of large-section butt-joint grooves of inclined steel tower sections, which mainly comprises the steps of enabling large-section butt-joint grooves of all plates of a lower section of a steel tower to be positioned on a common horizontal plane, and enabling all plates of the upper section and the lower section of the steel tower to be positioned in a Z direction by taking the common horizontal plane as a reference when being hoisted; then, the positions of the upper and lower plates of the steel tower segment are adjusted at X, Y, and any adjustment in the X, Y direction does not affect the positions of the upper and lower plates of the steel tower segment in the Z direction; and finally, welding the groove side and the back of the steel tower section in sequence. The invention has reasonable conception, can practically solve the problem of large-section butt joint positioning of the steel tower section, can conveniently adjust each plate after positioning, can ensure that most welding work is finished at a flat angle position which is easy to ensure the welding quality, does not need to be additionally put into, and has simple process and easy operation.
Description
Technical Field
The invention belongs to the technical field of bridge steel tower manufacturing, and particularly relates to a welding method for a large-section butt-joint groove of an inclined steel tower section.
Background
In recent years, in bridge steel tower design in China, some inclined steel towers with novel structures appear, and the inclined steel towers incline in one direction or incline in the longitudinal direction and the transverse direction, as shown in fig. 6. In addition, the section of the inclined steel tower is an irregular section, the lower part of the tower body is thick, the upper part of the tower body is thin, and all the plates have different angles along the tower body, as shown in fig. 7.
Because the steel towers are huge, the steel towers must be manufactured, transported and hoisted in blocks. In order to accurately position the steel tower segmented sections in the hoisting process, the steel tower is segmented by adopting horizontal tangential planes (see fig. 6), and in this case, the large-section butt welding groove of the steel tower segments is necessarily different from the traditional groove type. Two types of large-section butt joint grooves of the traditional steel tower sections are adopted, one type is ceramic liner reserved gap single-sided welding and double-sided forming welding (see figure 7), and the other type is 2mm blunt edge back chipping welding (see figure 8) reserved by taking the vertical end face of the lower section plate as a reference. However, when the angles of the plates at the large sections of the steel tower sections are different, the two groove types are only suitable for butt joint of the large sections of the normal section segmented steel tower sections.
For the inclined steel tower with the horizontal section divided into blocks, the inclination angles of each segment steel tower plate unit are different, if the traditional groove type is adopted, the grooves of all the plates forming the steel tower are not on the same plane, the large section of the steel tower cannot be positioned, and the adjustment is difficult. For example, the section of the steel tower shown in fig. 9 is composed of 8 wall plates from W1 to W8 and 4 web plates from F1 to F4, and the inclination angles of the plate plates are different.
At present, two types of butt joint grooves exist between traditional bridge steel tower sections in China, one type is ceramic liner reserved gap single-sided welding double-sided forming welding, the other type is back chipping welding with the vertical end face of a lower section plate as a reference, and the two types of grooves are only suitable for large-section butt joint of vertical steel tower sections with normal blocking. For large-section butt joint of the horizontal segmented inclined steel tower, the traditional butt joint groove is difficult to position when the steel tower sections are hoisted, and when the positions of individual plates are required to be adjusted, the positions of other plates on the same section are affected, and each hoisting section is long in time consumption and unsatisfactory in assembly effect.
Therefore, a brand new steel tower segment butt joint groove type needs to be designed, the problem of large-section butt joint positioning of the steel tower segment can be really solved, and each plate can be conveniently adjusted after positioning; therefore, it is urgent to develop a large-section butt-joint groove and a welding method for a horizontal section segmented inclined steel tower segment.
Disclosure of Invention
Aiming at the technical problems in the background technology, the invention provides a welding method for a large-section butt joint groove of an inclined steel tower section, which has reasonable conception, can practically solve the problem of large-section butt joint positioning of the steel tower section, can conveniently adjust each plate after positioning, can ensure that most of welding work is finished at a flat angle position which is easy to ensure the welding quality, does not need to be additionally invested, and has simple process and easy operation.
The technical scheme of the invention is as follows:
the welding method of the large-section butt joint groove of the inclined steel tower section mainly comprises the steps of enabling the large-section butt joint groove of all the plates of the lower section of the steel tower to be positioned on a common horizontal plane, and enabling each plate of the upper section and the lower section of the steel tower to be positioned in the Z direction by taking the common horizontal plane as a reference when being hoisted; then, the positions of the upper and lower plates of the steel tower segment are adjusted at X, Y, and any adjustment in the X, Y direction does not affect the positions of the upper and lower plates of the steel tower segment in the Z direction; and finally, welding the groove side and the back of the steel tower section in sequence.
The welding method of the large-section butt joint groove of the inclined steel tower section specifically comprises the following steps:
(1) Computer simulation lofting
The large sample of the groove of each plate of the upper section and the lower section of the steel tower is discharged according to the solid bridge posture of the steel tower;
(2) Hoisting steel tower lower segment plate
(3) Hoisting steel tower upper segment plate
Lifting the upper section plate to the position above the large-section butt joint horizontal tangent groove of the lower section, so that each plate of the upper section and the lower section of the steel tower is accurately positioned in the Z direction;
(4) Adjusting the positions of the upper and lower sections of the steel tower in the direction X, Y
The relative positions of the plates of the upper section are freely adjusted in the X, Y direction by taking the positions of the plates of the large section of the plate of the lower section as the reference;
(5) Welding
Firstly welding the groove side of each plate in butt joint of the large section of the steel tower segment, backing, filling and covering, and after the welding of the groove side is finished, gouging and back gouging the groove back side, and finishing the welding of the groove back side after back gouging.
The welding method of the large-section butt joint groove of the inclined steel tower section comprises the following steps: and (4) after adjusting the positions of the plates of the upper section and the lower section of the steel tower in the direction X, Y, enabling the grooves of all the plates of the lower section of the steel tower to be positioned on a common horizontal section, and then overlapping to form a 2mm blunt edge, wherein the overlapping part of the grooves of the plates of the upper section is a horizontal plane and is closely matched with the grooves of the plates of the lower section.
The welding method of the large-section butt joint groove of the inclined steel tower section comprises the following steps: the bevel in the step (4) is formed on the flat angle side of the plate and the bevel angle is 50 degrees.
The welding method of the large-section butt joint groove of the inclined steel tower section comprises the following steps: and (3) welding in the step (5) adopts gas shielded welding.
The welding method of the large-section butt joint groove of the inclined steel tower section comprises the following steps: and (5) considering the requirement of the upper and lower section plates of the steel tower on the same level and the plate thickness transition requirement in the welding process.
The beneficial effects are that:
the welding method of the large-section butt joint groove of the inclined steel tower section has reasonable conception, simple working procedure and simple operation, and by adopting a brand new groove type, grooves of all lower section plates are arranged on the same horizontal section, so that the steel tower section can be accurately positioned in the Z direction during hoisting, and each plate can be accurately adjusted in the X, Y direction after being positioned in the Z direction without influencing the position of the plate in the Z direction; the groove is formed on the flat angle side of the plate, so that most of welding workload can be completed in the flat angle, welding quality is guaranteed, gas shielded welding is adopted in welding, the groove side is firstly subjected to bottoming, filling and capping, and then the welding is completed after the back gouging and back gouging, so that the welding efficiency is high, the effect is good, and the welding method is suitable for popularization and application.
Drawings
FIG. 1 is a specific flow chart of a method for welding large-section butt-joint grooves of an inclined steel tower segment according to the invention;
FIG. 2 is a schematic view of a large-section butt-joint groove structure of a steel tower section in the method for welding a large-section butt-joint groove of an inclined steel tower section according to the invention;
FIG. 3 is a schematic view of a method for butt welding large sections of steel tower segments in the method for butt welding large sections of inclined steel tower segments according to the present invention;
FIG. 4 is a schematic view of a large-section butt-joint groove pattern of a steel tower segment in the method for welding a large-section butt-joint groove of an inclined steel tower segment according to the present invention;
FIG. 5 is a schematic diagram of a method of welding large-section butt-joint grooves of a tilting-type steel tower segment according to the present invention;
FIG. 6 is a schematic view of a tilt steel tower with horizontal section blocks;
FIG. 7 is a schematic diagram of a single-sided weld of a gap-reserved ceramic liner;
FIG. 8 is a schematic view of back chipping welding with the vertical end face of the lower segment plate as a reference;
fig. 9 is a schematic diagram of the plate unit composition of a steel tower segment.
Detailed Description
The invention relates to a welding method of large-section butt-joint grooves of inclined steel tower sections, which mainly comprises the steps of enabling large-section butt-joint grooves of all plates of a lower section of a steel tower to be positioned on a common horizontal plane, and enabling all plates of the upper section and the lower section of the steel tower to be positioned in a Z direction by taking the common horizontal plane as a reference when being hoisted; then, the positions of the upper and lower plates of the steel tower segment are adjusted at X, Y, and any adjustment in the X, Y direction does not affect the positions of the upper and lower plates of the steel tower segment in the Z direction; and finally, welding the groove side and the back of the steel tower section in sequence.
As shown in FIG. 1, the large-section butt-joint groove welding method for the inclined steel tower section comprises the following steps:
(1) Computer simulation lofting
The large sample of the groove of each plate of the upper section and the lower section of the steel tower is discharged according to the solid bridge posture of the steel tower;
(2) Hoisting steel tower lower segment plate
(3) Hoisting steel tower upper segment plate
Lifting the upper section plate to the position above the large-section butt joint horizontal tangent groove of the lower section, so that each plate of the upper section and the lower section of the steel tower is accurately positioned in the Z direction;
(4) Adjusting the positions of the upper and lower sections of the steel tower in the direction X, Y
The relative positions of the plates of the upper section are freely adjusted in the X, Y direction by taking the positions of the plates of the large section of the plate of the lower section as the reference; the grooves of all plates of the lower section of the steel tower are positioned on a common horizontal section, then 2mm blunt edges are lapped and constructed, and the lap joint of the grooves of the plates of the upper section is formed into a horizontal plane which is closely matched with the grooves of the plates of the lower section;
(5) Welding
And adopting gas shielded welding, firstly welding the groove side of each plate in butt joint of the large section of the steel tower section, bottoming, filling and covering, and after the groove side is welded, gouging and back gouging the groove back side, and finishing the groove back side welding after back gouging.
As shown in fig. 2 and 4, the bevel in the step (4) is cut on the flat angle side of the plate and the bevel angle is 50 °, so that most of welding workload is completed in the flat angle, and welding quality is ensured.
As shown in fig. 3 and 5, the above step (5) considers the requirement of the level of the upper and lower section plates of the steel tower and the plate thickness transition requirement in the welding process. The specific requirements are as follows: the upper and lower segment plates require the inner (outer) side of the steel tower to be level, and the welding should be carried out by taking care of leveling the side; the thicknesses of the upper and lower segment plates are not consistent, and the uniform transition of the welding seam can be noted during welding.
The invention has reasonable conception, can accurately position the inclined steel tower section in the Z direction when being lifted, can accurately adjust each plate of the steel tower section in the X, Y direction, does not influence the position of the plate in the Z direction, can finish most of welding work in a flat angle position which is easy to ensure the welding quality, further ensures the welding quality of the steel tower section, does not need to be put into any more, and is simple and easy to operate.
Claims (6)
1. A welding method of large-section butt-joint grooves of inclined steel tower sections is characterized in that large-section butt-joint grooves of all plates of a lower section of a steel tower are mainly positioned on a common horizontal plane, and each plate of the upper section and the lower section of the steel tower is positioned in a Z direction by taking the common horizontal plane as a reference when being hoisted; then, the positions of the upper and lower plates of the steel tower segment are adjusted at X, Y, and any adjustment in the X, Y direction does not affect the positions of the upper and lower plates of the steel tower segment in the Z direction; and finally, welding the groove side and the back of the steel tower section in sequence.
2. The method for welding the large-section butt-joint groove of the inclined steel tower segment according to claim 1, which comprises the following steps:
(1) Computer simulation lofting
The large sample of the groove of each plate of the upper section and the lower section of the steel tower is discharged according to the solid bridge posture of the steel tower;
(2) Hoisting steel tower lower segment plate
(3) Hoisting steel tower upper segment plate
Lifting the upper section plate to the position above the large-section butt joint horizontal tangent groove of the lower section, so that each plate of the upper section and the lower section of the steel tower is accurately positioned in the Z direction;
(4) Adjusting the positions of the upper and lower sections of the steel tower in the direction X, Y
The relative positions of the plates of the upper section are freely adjusted in the X, Y direction by taking the positions of the plates of the large section of the plate of the lower section as the reference;
(5) Welding
Firstly welding the groove side of each plate in butt joint of the large section of the steel tower segment, backing, filling and covering, and after the welding of the groove side is finished, gouging and back gouging the groove back side, and finishing the welding of the groove back side after back gouging.
3. The method for welding the large-section butt-joint groove of the inclined steel tower segment according to claim 2, wherein the method comprises the following steps: and (4) after adjusting the positions of the plates of the upper section and the lower section of the steel tower in the direction X, Y, enabling the grooves of all the plates of the lower section of the steel tower to be positioned on a common horizontal section, and then overlapping to form a 2mm blunt edge, wherein the overlapping part of the grooves of the plates of the upper section is a horizontal plane and is closely matched with the grooves of the plates of the lower section.
4. The method for welding the large-section butt-joint groove of the inclined steel tower segment according to claim 2, wherein the method comprises the following steps: the bevel in the step (4) is formed on the flat angle side of the plate and the bevel angle is 50 degrees.
5. The method for welding the large-section butt-joint groove of the inclined steel tower segment according to claim 2, wherein the method comprises the following steps: and (3) welding in the step (5) adopts gas shielded welding.
6. The method for welding the large-section butt-joint groove of the inclined steel tower segment according to claim 2, wherein the method comprises the following steps: and (5) considering the requirement of the upper and lower section plates of the steel tower on the same level and the plate thickness transition requirement in the welding process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310224799.1A CN116079188A (en) | 2023-03-09 | 2023-03-09 | Welding method for large-section butt-joint groove of inclined steel tower section |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310224799.1A CN116079188A (en) | 2023-03-09 | 2023-03-09 | Welding method for large-section butt-joint groove of inclined steel tower section |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195856A (en) * | 2015-10-27 | 2015-12-30 | 武昌船舶重工集团有限公司 | Transverse-butt-joint welding method for hull structural steel and forged steel |
| CN106903401A (en) * | 2017-04-28 | 2017-06-30 | 广船国际有限公司 | Obliquity buried arc welding method |
| CA3054475A1 (en) * | 2017-03-22 | 2018-09-27 | Wobben Properties Gmbh | Flange segment for a wind turbine, steel tower ring segment, and method |
| CN212453876U (en) * | 2019-12-09 | 2021-02-02 | 中铁宝桥集团有限公司 | Super thick wall plate steel tower segment connecting structure with thickness equal to or larger than 80mm of tower column wall plate |
| WO2021057307A1 (en) * | 2019-09-27 | 2021-04-01 | 中车株洲车辆有限公司 | Welding method for single-sided welding and double-sided forming of mag inverted butt joint |
-
2023
- 2023-03-09 CN CN202310224799.1A patent/CN116079188A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195856A (en) * | 2015-10-27 | 2015-12-30 | 武昌船舶重工集团有限公司 | Transverse-butt-joint welding method for hull structural steel and forged steel |
| CA3054475A1 (en) * | 2017-03-22 | 2018-09-27 | Wobben Properties Gmbh | Flange segment for a wind turbine, steel tower ring segment, and method |
| CN106903401A (en) * | 2017-04-28 | 2017-06-30 | 广船国际有限公司 | Obliquity buried arc welding method |
| WO2021057307A1 (en) * | 2019-09-27 | 2021-04-01 | 中车株洲车辆有限公司 | Welding method for single-sided welding and double-sided forming of mag inverted butt joint |
| CN212453876U (en) * | 2019-12-09 | 2021-02-02 | 中铁宝桥集团有限公司 | Super thick wall plate steel tower segment connecting structure with thickness equal to or larger than 80mm of tower column wall plate |
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