CN112570968B - Pile leg shell ring butt joint method - Google Patents
Pile leg shell ring butt joint method Download PDFInfo
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- CN112570968B CN112570968B CN202011421259.5A CN202011421259A CN112570968B CN 112570968 B CN112570968 B CN 112570968B CN 202011421259 A CN202011421259 A CN 202011421259A CN 112570968 B CN112570968 B CN 112570968B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
-
- 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
Abstract
The invention discloses a pile leg shell ring butt joint method, which relates to the technical field of offshore wind power installation ships and comprises the following steps: mounting a roller frame; a cross brace is arranged inside the pile leg cylindrical shell; the two pile leg cylinder sections are connected and folded through the connecting device and the inserting cylinder section; leveling a pile leg shell section; butt welding; stress relief; the pile leg falls back. The invention has the advantages that: the cross brace is arranged in the pile leg cylindrical shell section to prevent the deformation of the butt-joint pile leg cylindrical shell section, the two pile leg cylindrical shell sections are inserted into the cylindrical shell section through the connecting device to be connected and folded, the butt-joint pile leg cylindrical shell section is firmer in structure, the pile leg cylindrical shell section is convenient to weld through the installation of the roller frame, the whole straightness is good, the welding quality is good, stress is eliminated through the cross beam support after welding, the structure is stable, the stress eliminating treatment effect is good, cracks and deformation are not easy to generate, and the butt-joint method of the pile leg cylindrical shell section can be used for butt joint of large cylindrical shell sections, and the straightness and the opening precision are ensured.
Description
Technical Field
The invention relates to the technical field of offshore wind power installation ships, in particular to a pile leg shell ring butt joint method.
Background
The development and utilization of offshore wind energy have become bright spots of new energy development in the world. The wind power installation ship is a brand-new ocean engineering ship, is mainly used for transporting and hoisting offshore wind power equipment, integrates various functions of a transport ship, an offshore operation platform, a crane ship and a life supply ship, and can independently complete the transportation and installation operation. The working principle is as follows: the ship body extends the pile legs into the seabed through the lifting system, and when the pile legs reach the seabed, the ship body can be lifted to a certain distance away from the water surface to bear the weight of the ship body, so that a stable working platform is provided for the installation of offshore wind power equipment. With the continuous exploration of human ocean resources, the application of large-scale barrel sections in large-scale projects such as wind power platforms and dredge ships is more and more extensive, and the large-scale barrel sections have huge markets in docking.
Traditional spud leg shell ring butt joint adopts the welded mode, and direct butt joint welds, and the spud leg material is super thick super strength steel, and the welding is big with the installation degree of difficulty, and whole straightness accuracy is poor, and welding quality is poor, and easy crackle and deformation produce, and the fastness of structure is poor, and the spud leg is to receiving stress influence very big, need stress relief processing, and traditional mode structure is unstable, and stress relief processing effect is unsatisfactory.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pile leg shell ring butt joint method, which can solve the problems of high welding and installation difficulty, poor integral straightness, poor welding quality, easy generation of cracks and deformation, poor structural fastness and non-ideal stress relief treatment effect in butt joint direct welding.
In order to solve the technical problems, the technical scheme of the invention is as follows: the method comprises the following steps:
s1, mounting the roller frame: welding a plurality of roller frame support frames on a workshop base plate at intervals, arranging a plurality of roller frames on the support frames, and arranging two sections of pile leg cylinder sections to be butted on the roller frames;
s2, arranging a cross brace inside the pile leg cylindrical shell: the inside of the two sections of pile leg cylindrical sections is provided with a cross brace to prevent the deformation of the butted pile leg cylindrical sections;
s3, connecting and folding the two sections of pile leg cylinder sections through the connecting devices and the inserted cylinder sections;
s4, pile leg shell section leveling: after connecting and folding the two sections of butted pile leg cylinder sections, leveling the pile leg cylinder sections by using a top bracing bolt of a roller frame;
s5, butt welding: the welding groove of the pile leg shell ring is X-shaped, butt circular seam welding is carried out after the pile leg shell ring is leveled, and the speed of a welding trolley is adjusted to be synchronous with the rotation speed of the pile leg shell ring during welding so as to ensure the welding quality;
s6, stress relief: installing the pile leg on a cross beam support for stress relief, hanging the pile leg out before installation, then placing the half part of the rotary tool on a roller frame and fixing, and then returning the pile leg;
the beam support is arranged above the jack, the jack is jacked to be more than 105mm, then a steel plate is used for placing the pad, the beam support is arranged above the steel plate, springboard wood is placed on the beam support, the pile leg is ensured to fall on the beam support, the pile leg is subjected to vibration stress relief construction on the beam support, and the frequency of the stress in a main stress area is consistent with that in other areas after stress relief;
s7, dropping the pile leg: after stress is eliminated, the steel plate supported by the cross beam is removed, the pile leg falls onto the rotating tool, the other half part of the rotating tool is installed, and the bolt is screwed after adjustment and fitting so as to rotate the pile leg and facilitate installation of subsequent accessories.
Further, in step S5, the leg shell section is checked before welding to ensure that the deviation of the outside of the leg shell section is less than or equal to 2 mm.
Further, in the step S6, the steel plates of the shelf cushion are 30mm thick and 3 in number; the thickness of the springboard wood is 30 mm; the stability of the beam support is checked during vibration stress relief construction, and the mounted frame shaped like a Chinese character 'mi' is not detached during stress relief.
Further, in step S3, the connecting device is a T-shaped column structure, the T-shaped column structure is inserted into a section of leg tube section, a large diameter end of the T-shaped column structure is welded and fixed to the section of leg tube section, a gap is formed between a small diameter end of the T-shaped column structure and the section of leg tube section, and one end of the section of leg tube section, which is far away from the connecting device, is fixed to the cover plate through a bolt;
the method comprises the following steps that a cylinder wall of an insertion cylinder section is inserted into a gap formed between a T-shaped column structure and a section of pile leg cylinder section, the outer side of the insertion cylinder section and the inner side of the section of pile leg cylinder section as well as the inner side of the insertion cylinder section and the outer side of the T-shaped column structure are fixed through welding, and the insertion cylinder section is fixedly connected with the section of pile leg cylinder section through a connecting device;
the other section of the pile leg shell section is provided with a bolt hole, the inserting shell section is provided with a corresponding bolt hole, one end of the inserting shell section is inserted into the other section of the pile leg shell section, and the other section of the pile leg shell section and the inserting shell section are inserted into the corresponding two bolt holes through a pin shaft and fixed;
the large-diameter end part of the pin shaft is positioned on the inner side of the insertion cylinder section, the other end of the pin shaft extends out of the outer side of the other section of the pile leg cylinder section, a groove is formed in one end, extending out of the outer side of the other section of the pile leg cylinder section, of the pin shaft, and a steel wire rope is wound in the groove.
Furthermore, the position of the inner side of the inserted cylinder section corresponding to the pin shaft hole is provided with a limiting device, the limiting device comprises a connecting column and a baffle, the connecting column is fixed on the inner side of the inserted cylinder section, the baffle is fixed with the connecting column through a bolt, the large-diameter end of the pin shaft is positioned between the two connecting columns, and the pin shaft is blocked by the baffle.
The invention has the advantages that: the cross brace is arranged in the pile leg cylindrical shell section to prevent the deformation of the butt-joint pile leg cylindrical shell section, the two pile leg cylindrical shell sections are inserted into the cylindrical shell section through the connecting device to be connected and folded, the butt-joint pile leg cylindrical shell section is firmer in structure, the pile leg cylindrical shell section is convenient to weld through the installation of the roller frame, the whole straightness is good, the welding quality is good, stress is eliminated through the cross beam support after welding, the structure is stable, the stress eliminating treatment effect is good, cracks and deformation are not easy to generate, and the butt-joint method of the pile leg cylindrical shell section can be used for butt joint of large cylindrical shell sections, and the straightness and the opening precision are ensured.
Drawings
FIG. 1 is a view showing the arrangement of a roller frame and a supporting frame according to the present invention;
FIG. 2 is a schematic view of a cross brace installed in a leg shell section of the present invention;
fig. 3 is a schematic view of the construction of a section of leg shell section and insert shell section connection of the present invention;
fig. 4 is a schematic view of the construction of the present invention in which one leg shell section is connected to another leg shell section;
FIG. 5 is a cross-sectional view B-B of FIG. 4 of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 in accordance with the present invention;
fig. 7 is a schematic view of the butt joint and closure of the leg shell section of the present invention;
fig. 8 is a schematic view of a butt welding groove of a leg shell section of the present invention;
figures 9 and 10 are diagrams of the stress relief support of the leg shell segments of the present invention after butt joint;
figures 11 and 12 are views of the leg in the drop-back condition of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
The specific implementation mode adopts the following technical scheme: the method comprises the following steps:
s1, mounting the roller frame: welding a plurality of roller frame support frames on a workshop base plate at intervals, arranging a plurality of roller frames on the support frames, and arranging two sections of pile leg cylinder sections to be butted on the roller frames, wherein the arrangement state diagram of the roller frames and the support frames is shown in figure 1.
S2, arranging a cross brace inside the pile leg cylindrical shell: the cross brace is arranged inside the two sections of leg shell sections to prevent the butt-jointed leg shell sections from deforming, and fig. 2 shows a schematic view of installing the cross brace in the leg shell sections.
S3, connecting and folding the two pile leg shell sections through the connecting device 4 and the inserting shell section 3:
as shown in fig. 3-6, the connecting device 4 is a T-shaped column structure, the T-shaped column structure is inserted into a section of leg shell section 1, the large diameter end 41 of the T-shaped column structure is welded and fixed with a section of leg shell section 1, a gap is formed between the small diameter end 42 of the T-shaped column structure and a section of leg shell section 1, and a cover plate is fixed on one end of a section of leg shell section 1 far from the connecting device 4 through bolts.
The cylinder wall of the insertion cylinder section 3 is inserted into a gap formed between the T-shaped column structure and one section of pile leg cylinder section 1, the outer side of the insertion cylinder section 3 and the inner side of one section of pile leg cylinder section 1 and the inner side of the insertion cylinder section 3 and the outer side of the T-shaped column structure are fixed through welding, the insertion cylinder section 3 is fixedly connected with one section of pile leg cylinder section 1 through a connecting device 4, the contact surface between the insertion cylinder section 3 and one section of pile leg cylinder section 1 is large, and the connection is firmer.
The other section of the pile leg shell section 2 is provided with a bolt hole, the inserting tube section 3 is provided with a corresponding bolt hole, one end of the inserting tube section 3 is inserted into the other section of the pile leg shell section 2, the other section of the pile leg shell section 2 and the inserting tube section 3 are inserted into the corresponding two bolt holes through a pin shaft 5 to be fixed, the inner side of the inserting tube section 3 is provided with a limiting device 6 corresponding to the position of a pin shaft hole, the limiting device 6 comprises a connecting column 61 and a baffle plate 62, the connecting column 61 is fixed at the inner side of the inserting tube section 3, the baffle plate 62 is fixed with the connecting column 61 through a bolt, the large-diameter end of the pin shaft 5 is positioned between the two connecting columns 61, the baffle plate 62 blocks the pin shaft 5, the inserting tube section 3 is connected with the other section of the pile leg shell section 2, the limiting device 6 is arranged at the corresponding position of the pin shaft 5, the baffle plate 62 of the limiting device 6 can prevent the pin shaft 5 from falling off, and ensure that the connection of the pile leg shell section 1 and the other section of the pile leg shell section 2 is firm after pile is connected, the large-diameter end part of the pin shaft 5 is positioned on the inner side of the insertion cylinder section 3, the other end of the pin shaft 5 extends out of the outer side of the other section of the pile leg cylinder section 2, a groove 7 is formed in one end, extending out of the other section of the pile leg cylinder section 2, of the pin shaft 5, a steel wire rope is wound in the groove 7, the groove 7 is formed in the outer end of the pin shaft 5, the steel wire rope is convenient to wind and bind, the pin shaft 5 is ensured not to axially float, the pin shaft 5 is ensured not to extend out of the insertion cylinder section 3 during butt joint, and interference generated when the other section of the pile leg cylinder section 2 is hoisted is avoided; after the inserting barrel section 3 is fixed with the other section of the pile leg barrel section 2, a steel wire rope is wound and tied up in the shaft end groove 7 of the pin shaft 5, and the assembly of the pile leg without the movement of the pin shaft 5 in the axial direction is finished.
S4, pile leg shell section leveling: after the two butted pile leg cylinder sections are connected and folded, the pile leg cylinder sections are leveled by using a top bracing bolt of a roller frame, and as shown in fig. 7, a schematic diagram of the butt joint and folding of the pile leg cylinder sections is shown.
S5, butt welding: the welding groove of the pile leg shell ring is X-shaped, butt girth welding is carried out after the pile leg shell ring is leveled, the speed of a welding trolley is adjusted to be synchronous with the rotation speed of the pile leg shell ring during welding so as to ensure the welding quality, and the pile leg shell ring needs to be checked before welding so as to ensure that the deviation of the outer side of the pile leg shell ring is less than or equal to 2 mm; when the vibration aging stress is eliminated, the stability of the beam support needs to be checked, and the installed frame shaped like a Chinese character 'mi' is not removed when the stress is eliminated, as shown in fig. 8, a schematic diagram of a butt welding groove of the pile leg shell ring is shown.
S6, stress relief: installing the pile leg on a cross beam support for stress relief, hanging the pile leg out before installation, then placing the half part of the rotary tool on a roller frame and fixing, and then returning the pile leg;
the cross beam support is arranged above the jack, the jack is jacked to be more than 105mm, then 3 steel plates with the thickness of 30mm are used for placing the pad, the cross beam support is arranged above the steel plates, springboard wood with the thickness of 30mm is placed on the cross beam support, the pile leg falls on the cross beam support, the pile leg performs vibration stress relief construction on the cross beam support, the main stress area stress of the welding position after stress relief tends to be consistent with the frequency of other areas, and as shown in fig. 9 and 10, a stress relief support state diagram after butt joint of the pile leg barrel section is shown.
S7, pile leg falling: after the stress is eliminated, the steel plate supported by the beam is removed, the pile leg falls onto the rotating tool, the other half part of the rotating tool is installed, the bolt is screwed after the adjustment and the fitting so as to rotate the pile leg, and the subsequent installation of accessories is facilitated, as shown in fig. 11 and 12, the pile leg falling-back state diagram is provided.
The rotating tool in the steps S6 and S7 comprises arc structures of two half parts, the arc structures of the two half parts are both semi-annular structures, the arc structures of the two half parts are combined to form an annular structure, and the end parts of the arc structures of the two half parts are locked through a rigging turnbuckle;
the arc structures of the two half parts are provided with an outer supporting structure and an inner pressing structure, the outer supporting structure is arc-shaped, the two outer supporting structures are combined into a ring, and the outer supporting structure is arranged on the roller carrier; the inner pressing structure is arranged on the inner side of the outer supporting structure and is formed by a plurality of pressing plates in an annular array, and the pressing plates are in a trapezoidal boss structure.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A pile leg shell ring butt joint method is characterized in that: the method comprises the following steps:
s1, mounting the roller frame: welding a plurality of roller frame support frames on a workshop base plate at intervals, arranging a plurality of roller frames on the support frames, and arranging two sections of pile leg cylinder sections to be butted on the roller frames;
s2, arranging a cross brace inside the pile leg cylindrical shell: the inside of the two sections of pile leg cylindrical sections is provided with a cross brace to prevent the deformation of the butted pile leg cylindrical sections;
s3, connecting and folding the two sections of pile leg cylinder sections through the connecting devices and the inserting cylinder sections;
s4, pile leg shell section leveling: after connecting and folding the two sections of butted pile leg cylinder sections, leveling the pile leg cylinder sections by using a top bracing bolt of a roller frame;
s5, butt welding: the welding groove of the pile leg shell ring is X-shaped, butt circular seam welding is carried out after the pile leg shell ring is leveled, and the speed of a welding trolley is adjusted to be synchronous with the rotation speed of the pile leg shell ring during welding so as to ensure the welding quality;
s6, stress relief: installing the pile leg on a cross beam support for stress relief, lifting the pile leg out before installation, then placing and fixing the half part of the rotary tool on a roller frame, and then returning the pile leg;
the cross beam support is arranged above the jack, the jack is jacked by more than 105mm, then a steel plate is used for placing the pad, the cross beam support is arranged above the steel plate, springboard wood is placed on the cross beam support, the pile leg is ensured to fall on the cross beam support, the pile leg is subjected to vibration stress relief construction on the cross beam support, and the frequency of the stress in a main stress area is consistent with that in other areas after stress relief;
s7, pile leg falling: after stress is eliminated, removing the steel plate supported by the cross beam, enabling the pile leg to fall onto the rotating tool, installing the other half part of the rotating tool, adjusting and fitting, and then screwing the bolt to rotate the pile leg, so that subsequent accessories can be conveniently installed;
in the step S3, the connecting device is a T-shaped column structure, the T-shaped column structure is inserted into a section of leg shell section, a large diameter end of the T-shaped column structure is welded and fixed with a section of leg shell section, a gap is formed between a small diameter end of the T-shaped column structure and a section of leg shell section, and one end of the section of leg shell section, which is far away from the connecting device, is fixed with the cover plate through a bolt;
the method comprises the following steps that a cylinder wall of an insertion cylinder section is inserted into a gap formed between a T-shaped column structure and a section of pile leg cylinder section, the outer side of the insertion cylinder section and the inner side of the section of pile leg cylinder section as well as the inner side of the insertion cylinder section and the outer side of the T-shaped column structure are fixed through welding, and the insertion cylinder section is fixedly connected with the section of pile leg cylinder section through a connecting device;
the other section of the pile leg shell section is provided with a bolt hole, the inserting shell section is provided with a corresponding bolt hole, one end of the inserting shell section is inserted into the other section of the pile leg shell section, and the other section of the pile leg shell section and the inserting shell section are inserted into the corresponding two bolt holes through a pin shaft and fixed;
the large-diameter end part of the pin shaft is positioned on the inner side of the insertion cylinder section, the other end of the pin shaft extends out of the outer side of the other section of the pile leg cylinder section, a groove is formed in one end, extending out of the outer side of the other section of the pile leg cylinder section, of the pin shaft, and a steel wire rope is wound in the groove.
2. The method of claim 1, wherein the step of butt joining the leg shell sections comprises: in step S5, the leg shell section is inspected before welding to ensure that the deviation of the outer side of the leg shell section is less than or equal to 2 mm.
3. The method of claim 1, wherein the step of butt joining the leg shell sections comprises: in the step S6, the steel plates of the rest pad are 30mm thick and 3; the thickness of the springboard wood is 30 mm; the stability of the beam support is checked during vibration stress relief construction, and the installed cross beam support is not detached during stress relief.
4. The method of claim 1, wherein the step of butt joining the leg shell sections comprises: the inner side of the inserted cylinder section is provided with a limiting device corresponding to the position of the pin shaft hole, the limiting device comprises a connecting column and a baffle, the connecting column is fixed on the inner side of the inserted cylinder section, the baffle is fixed with the connecting column through a bolt, the large-diameter end of the pin shaft is positioned between the two connecting columns, and the pin shaft is blocked by the baffle.
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| CN202011421259.5A CN112570968B (en) | 2020-12-08 | 2020-12-08 | Pile leg shell ring butt joint method |
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| CN202011421259.5A CN112570968B (en) | 2020-12-08 | 2020-12-08 | Pile leg shell ring butt joint method |
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| CN113231721B (en) * | 2021-07-09 | 2021-11-26 | 南通泰胜蓝岛海洋工程有限公司 | Non-back-gouging welding process for fan tower shell ring |
| CN114161073B (en) * | 2021-12-20 | 2022-10-25 | 江苏日明消防设备股份有限公司 | A welding auxiliary device for fire extinguisher bottle welding process |
| CN114012372B (en) * | 2022-01-05 | 2022-04-08 | 中交三航(南通)海洋工程有限公司 | Construction method of super-large-diameter single-pile composite cylinder |
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| CN100493804C (en) * | 2007-10-22 | 2009-06-03 | 大连船舶重工集团有限公司 | Welding technology method of lifting device box in self-lifting type drilling platform |
| CN101579700B (en) * | 2009-06-24 | 2010-12-01 | 青岛北海船舶重工有限责任公司 | Manufacturing method for ultra-long and ultra-thick circular plate |
| CN101602194B (en) * | 2009-07-11 | 2011-02-09 | 中国第二冶金建设有限责任公司 | Method for pairing and lengthening steel cylinders |
| CN102277475B (en) * | 2011-08-11 | 2013-01-23 | 山西平阳重工机械有限责任公司 | Vibratory stress relief corrected cylindrical part deforming method and anti-deformation restricting fixture |
| CN102676793A (en) * | 2012-03-15 | 2012-09-19 | 哈尔滨电机厂有限责任公司 | Vibratory stress relief technology for stress relief and dimensional stability of large cylindrical valves |
| CN106624576B (en) * | 2017-03-14 | 2018-06-19 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of conical shell horizontal rotation device |
| CN108480873A (en) * | 2018-06-01 | 2018-09-04 | 南通振华重型装备制造有限公司 | A kind of folding method of jack up wind-powered electricity generation mounting platform spud leg epimere and spud leg hypomere |
| CN211804552U (en) * | 2019-11-26 | 2020-10-30 | 上海振华重工(集团)股份有限公司南通分公司 | Portal frame assembly stress release cart walking jacking structure |
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