CN114083242A - Manufacturing method of large-diameter thin-wall suction cylinder body of offshore wind power - Google Patents
Manufacturing method of large-diameter thin-wall suction cylinder body of offshore wind power Download PDFInfo
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- CN114083242A CN114083242A CN202111475113.3A CN202111475113A CN114083242A CN 114083242 A CN114083242 A CN 114083242A CN 202111475113 A CN202111475113 A CN 202111475113A CN 114083242 A CN114083242 A CN 114083242A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- B23K37/0538—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 for rotating tubes, e.g. rollers
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Abstract
The invention discloses a method for manufacturing a large-diameter thin-wall suction barrel body of offshore wind power, and relates to the technical field of offshore wind power manufacturing. The method specifically comprises the following steps: s1, dividing the cylinder into 8 segments, and respectively manufacturing each segment; s2, manufacturing each segment; s3, strengthening the inner part of the single circle; s4, vertical welding and splicing; and S5, assembling the residual barrel sections. The invention has the advantages that: aiming at the manufacturing of the large-diameter thin-wall suction barrel body, the barrel body is divided into 8 sections to be manufactured respectively, the barrel body sections at the end parts are internally reinforced, the structural strength is ensured, and the smooth assembly, hoisting, transferring, turning-over and other processes of the barrel body are ensured; the vertical welding and splicing are performed firstly, then the rest cylinders are sequentially assembled in a segmented mode, the manufacturing process is optimized, the production efficiency is improved, the assembling precision is improved, the safe construction is facilitated, and the quality stability is improved.
Description
Technical Field
The invention relates to the technical field of offshore wind power manufacturing, in particular to a manufacturing method of a large-diameter thin-wall suction cylinder body of offshore wind power.
Background
In recent years, the country increases the supporting force on offshore wind power projects, and the wind power industry in China is in a vigorous development stage. In 2020, the first suction tube jacket in China is successfully installed on the sea, and a novel offshore wind power jacket structure form, namely a suction tube jacket, is created. The suction tube technology is applied to offshore construction, has the characteristics of convenience and rapidness in installation, short period, convenience in detachment, no noise, no piling vibration and the like, can effectively reduce the pollution of engineering construction to the marine environment, protects the ecological environment, and makes positive contribution to practice of green development strategies. With the improvement of the technology, the suction cylinder type jacket gradually becomes the development trend of the offshore wind power market.
At present, the single machine capacity of the largest suction tube jacket in China is 10MW, the diameter of a suction tube reaches 12000mm, and the plate thickness is 35-50 mm. Compared with the traditional wind power tubular pile manufacturing technology, the diameter of the suction tube is larger, the plate thickness is thinner, the manufacturing technology difficulty is larger, the wind power matching production line in the prior art can not meet the manufacturing requirement of the suction tube completely, the tube body is easy to deform in the manufacturing process, and how to realize the manufacture of the large-diameter thin plate tube body becomes a key problem.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for manufacturing a cylinder body of a large-diameter thin-wall suction cylinder for offshore wind power generation, which can solve the problems that the cylinder body manufacturing method in the prior art cannot meet the manufacturing requirements of large-diameter and thin-wall cylinder bodies, is difficult to manufacture and is easy to deform in the cylinder body manufacturing process.
In order to solve the technical problems, the technical scheme of the invention is as follows: the method comprises the following steps:
s1, dividing the barrel into 8 sections, sequentially forming a first section, a second section, a third section, a fourth section, a fifth section, a sixth section, a seventh section and an eighth section from the top to the bottom of the barrel, and respectively manufacturing the sections;
s2, preparing each segment:
s2.1, cutting and blanking: measuring the size of a steel plate before blanking of the steel plate, and detecting whether the size meets the blanking requirement;
s2.2, sand washing: for each single circle of each segment, carrying out sand washing on the upper plane of the steel plate after blanking, wherein the sand washing plane corresponds to the outer side of the single circle of each segment;
s2.3, scribing: after the sand washing is finished, turning over the steel plate, ensuring that the sand washing surface faces downwards, drawing a width central line of the steel plate, a quartering line of the plate length and a pre-bending inspection line at the end part of the steel plate, and knocking sample punching holes at two ends of the line for subsequent inspection;
s2.4, forming a groove: after the marking-out inspection is qualified, a splicing groove is formed in the steel plate, and the groove is an X-shaped groove;
s2.5, steel plate rolling: one end of a steel plate is pre-bent through a plate bending machine, then the steel plate is rolled from the non-pre-bent end of the steel plate, auxiliary protection is achieved through a travelling crane in the rolling process, a clamp is arranged above the steel plate and pulls one side of the rolled steel plate, the steel plate is prevented from being downwarped in the rolling process, and when an auxiliary clamping point of the rolling passes through the highest point, a carrier roller on the upper portion of the plate bending machine needs to be jacked for auxiliary support;
s2.6, preheating the steel plate after being rolled, completing continuous backing welding of longitudinal seams on the outer side of the segmented single circle, installing a clamp code to protect the steel plate after welding, and performing flaw detection on the longitudinal seams of the segmented single circle;
s3, single-circle internal reinforcement: in the single circles of all the sections, internally reinforcing the sectional single circles of the first section and the eighth section at two ends of the cylinder body, firstly installing turning-over lifting lugs on the first section and the eighth section, hoisting and turning over the rolled and welded sectional single circles of the first section and the eighth section to a horizontal jig frame, installing an inner ring plate in the first section, installing an inner ring plate and a cross brace in the eighth section, and measuring the ellipticity after the installation is finished;
s4, vertically welding and splicing the cylinder body: installing turning lifting lugs on the second section and the seventh section, turning over and lifting the seventh section to a station for vertical welding and splicing with an eighth section on the horizontal jig, turning over and lifting the second section to the station for vertical welding and splicing with the first section on the horizontal jig, and performing flaw detection after welding is finished;
the longitudinal seam of the barrel is staggered by 180 degrees, the deviation of the quartering line is less than or equal to 1mm, and the dislocation deviation of the butt joint positions of the upper barrel and the lower barrel is less than or equal to 2 mm;
s5, grouping the remaining cylinder segments:
s5.1, preparing a pairing device: the structure of an assembly device formed by an original roller carrier is modified, lateral blocking supports are respectively added on two sides of the roller carrier, and the lateral blocking supports are used for supporting the side surface of the barrel section so as to increase the contact point with the barrel section;
s5.2, turning over and hoisting the seventh section and the eighth section which are subjected to vertical welding to a fitting device by using a travelling crane, and performing corner wrapping treatment on the contact part of the steel wire rope and the section of the cylinder in the turning-over and hoisting process;
s5.3, hoisting the sixth section to a fitting device for fitting, finishing fitting by means of a traveling crane due to the fact that no reinforcing structure is arranged in the sixth section, continuously performing backing welding after the sixth section and the seventh section are fitted, wherein the backing welding is multi-layer and multi-channel, the thickness is not less than 15mm, detecting whether the barrel section is deformed or not, measuring the straightness, and continuously fitting the rest barrel sections after no error;
s5.4, sequentially hoisting the fifth section, the fourth section and the third section to a pairing device respectively for pairing, wherein the pairing mode is the same as that of the sixth section, continuous backing welding is performed after the pairing is finished, and the backing welding is multi-layer and multi-pass;
s5.5, turning over and hoisting the first section and the second section which are subjected to vertical welding to a fitting device by using a travelling crane, fitting the second section and the third section, continuously performing backing welding after fitting, wherein the backing welding is multi-layer and multi-channel, and hoisting the barrel which is subjected to fitting to a circular seam station after detection is completed;
during hoisting, 2 traveling cranes are adopted for hoisting, the hoisting point is close to the reinforced position of the barrel, the hoisting is stable during hoisting, if the barrel is in an inclined state, the hoisting is stopped immediately, the position is adjusted, and the barrel is ensured to be in a horizontal state after the hoisting;
s5.6, girth welding: and hoisting the barrel to a circular seam roller frame, welding the circular seam of the barrel by submerged arc welding, and performing flaw detection after the welding is finished to finish the manufacture of the barrel.
Further, in the step S2.5, after the steel plate is placed on the roller of the plate bending machine, the perpendicularity between the steel plate and the roller of the plate bending machine is adjusted according to the central line and the inspection line of the steel plate.
Further, in the step S2.6, when the longitudinal seam welding is performed on the rolled steel plate, backing welding is performed on the outer side of the seam, and a flux-cored wire CO is used2The gas shielded welding method comprises the steps of welding the metal plate with the thickness of 8-10 mm, performing multi-layer and multi-pass welding, adjusting a longitudinal joint to a flat welding position after backing welding, performing carbon planing on the root of the inner side of the welding joint, polishing a carburized layer until the carburized layer is white, filling welding seams on the inner side and the outer side, performing submerged arc automatic welding on a cover surface, and filling welding seam metal in an equal amount in a mode of alternately welding the inner side and the outer side of the welding joint in order to control welding deformation.
Further, in step S4, during vertical welding and splicing, the seventh segment and the eighth segment, and the first segment and the second segment respectively use the quartering line as a reference, and the error of the reference line is less than or equal to 1 mm; and continuous backing welding is carried out on the outer side of the segments during vertical welding splicing, and the welding seam is multilayer and multi-channel, and is subjected to groove welding on the inner side.
Further, in the step S5.6, before the girth welding, the steel wire rope is pulled along the length direction of the cylinder at three radial points of 0 °, 120 ° and 240 ° of the cylinder to check the straightness of the cylinder, and during the girth welding, the large opening on the inner side of the cylinder is welded, and then the carbon on the outer side of the cylinder is gouged and welded.
Further, the assembly device in step S5 is used for supporting the barrel during barrel assembly, and includes a roller frame, rollers of the roller frame are disposed on two sides of the bottom of the suction barrel, the rollers of the roller frame are disposed on a support seat of the roller frame, two sides of the roller frame are respectively provided with a lateral retaining support, and the lateral retaining supports support the lateral surface of the suction barrel to increase a contact point with the suction barrel;
the lateral retaining support comprises a base, a supporting frame, an adjusting frame and an auxiliary roller, wherein the base is arranged on the side surface of a supporting seat of the roller frame, the base and the supporting seat of the roller frame are fixedly connected through a bolt, the heights of the base and the supporting seat are the same, and the base and the supporting seat are arranged on the same horizontal line;
hinged plates are respectively installed on two sides of the top of the base and are fixedly connected with the base through bolts, a support frame and an adjusting frame are respectively hinged to the two hinged plates, the bottom end of the support frame is hinged to a hinged plate close to the roller frame, the bottom end of the adjusting frame is hinged to a hinged plate far away from the roller frame, and the upper portion of the support frame is hinged to the top end of the adjusting frame;
and one side of the support frame, which is far away from the adjusting frame, is provided with an auxiliary roller.
Furthermore, the bottom of the side face of the supporting seat of the roller carrier is provided with a fixed supporting plate, one end of the fixed supporting plate extends out of the supporting seat and is positioned below the base which is laterally blocked and supported, and the fixed supporting plate is fixedly connected with the supporting seat and the base respectively.
Furthermore, the bottom of the roller carrier is provided with a movable wheel, and the bottom of the base of the lateral blocking support is also provided with the movable wheel.
Furthermore, one side of the support frame, which is close to the adjusting frame, is connected with a connecting plate, the connecting plate is fixedly connected with the support frame through bolts, a hinge hole is formed in the connecting plate, and the end part of the adjusting frame is hinged with the connecting plate.
The invention has the advantages that: aiming at the manufacturing of a large-diameter thin-wall suction barrel body, the barrel body is divided into 8 sections to be manufactured respectively, grooves, rolling circles and straight seam welding are formed on each barrel section, after the rolling circles, the barrel sections at the end parts are internally reinforced, the structural strength is ensured, and the procedures of smooth assembly, hoisting, transferring, turning over and the like of the barrel body are ensured;
after the manufacturing of each section of the cylinder is finished, the first section and the second section, the seventh section and the eighth section are respectively subjected to vertical welding and splicing, and then the rest cylinder sections are sequentially assembled and welded by welding seams, so that the manufacturing process is optimized, the assembling time is effectively reduced, the assembling precision is improved, the safe construction is facilitated, and the method has important significance for improving the wind power manufacturing level;
the assembly device is structurally modified, lateral blocking supports are added to the roller carriers, and the barrel is prevented from downwarping and local stress deformation by increasing the contact surface between the roller carriers and the barrel;
the manufacturing of the large-diameter sheet cylinder of the offshore wind power is realized, the production efficiency is improved, and the stability of the quality is improved.
Drawings
FIG. 1 is a schematic view of a sectioned steel plate rolling state of a cylinder according to the present invention;
FIG. 2 is a schematic view of an eighth segment of the drum of the present invention with an inner ring plate and a cross brace mounted on a horizontal carcass;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view of a seventh segment and an eighth segment of a cartridge body of the present invention being joined by vertical welding;
FIG. 5 is a schematic view of a second segment of a cartridge of the present invention being joined to a first segment by vertical welding;
FIG. 6 is a schematic view of turning over and hoisting a seventh segment and an eighth segment after vertical welding of the cylinder body;
FIG. 7 is a schematic illustration of a sixth segment paired with a seventh segment of the cartridge of the present invention;
FIG. 8 is a schematic illustration of a fifth segment, fourth segment, third segment pair of the cartridge of the present invention;
FIG. 9 is a schematic view of a vertical welded completed pair of first and second segments and a third segment of a can of the present invention;
FIG. 10 is a schematic structural diagram of a pairing device when the cylinders are paired according to the present invention;
fig. 11 is an enlarged view of a part of the structure of the pairing device when the cylinders are paired according to 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 diameter of the suction tube in the embodiment reaches 12000mm, the plate thickness is 35-50 mm, and the height reaches 22000 mm.
The following manufacturing scheme is specifically adopted: the method comprises the following steps:
and S1, dividing the cylinder into 8 sections, sequentially forming a first section 101, a second section 102, a third section 103, a fourth section 104, a fifth section 105, a sixth section 106, a seventh section 107 and an eighth section 108 from the top to the bottom of the cylinder 10, and respectively manufacturing the sections.
S2, preparing each segment:
s2.1, cutting and blanking: measuring the size of a steel plate before blanking of the steel plate, and detecting whether the size meets the blanking requirement;
s2.2, sand washing: for each single circle of each segment, carrying out sand washing on the upper plane of the steel plate after blanking, wherein the sand washing plane corresponds to the outer side of the single circle of each segment;
s2.3, scribing: after the sand washing is finished, turning over the steel plate, ensuring that the sand washing surface faces downwards, drawing a width central line of the steel plate, a quartering line of the plate length and a pre-bending inspection line at the end part of the steel plate, and knocking sample punching holes at two ends of the line for subsequent inspection;
s2.4, forming a groove: after the marking-out inspection is qualified, a splicing groove is formed in the steel plate, and the groove is an X-shaped groove;
s2.5, steel plate rolling: pre-bending one end of a steel plate through a plate bending machine, adjusting the verticality of the steel plate and a roller of the plate bending machine according to the central line and a test line of the steel plate after the steel plate is placed on a roller of the plate bending machine, wherein the length of a pre-bending arc is 4000mm, then rounding is performed from the non-pre-bending end of the steel plate, auxiliary protection is performed by a travelling crane in the coiling process, a clamp is arranged at the position 4000mm away from the edge of the plate above the steel plate and pulls one side of the rounded steel plate, the steel plate is prevented from being downwarped in the coiling process, when an auxiliary clamping point of the rounding passes through the highest point, the roller at the upper part of the plate bending machine needs to be jacked for auxiliary support, and the schematic diagram of the rounding is shown in fig. 1;
s2.6, preheating the steel plate after being rolled, completing continuous backing welding of longitudinal seams on the outer side of the segmented single circle, installing a clamp code to protect the steel plate after welding, and performing flaw detection on the longitudinal seams of the segmented single circle;
when the longitudinal seam welding is carried out on the rolled steel plate, backing welding is carried out on the outer side of the seam, and a flux-cored wire CO is adopted2The gas shielded welding method comprises the steps of welding the workpiece with the thickness of 8-10 mm, performing multi-layer and multi-pass welding, adjusting a longitudinal joint to a flat welding position after backing welding, performing carbon planing on the root of the inner side of the welding joint, polishing a carburized layer until the carburized layer is white, filling the welding joints on the inner side and the outer side, and performing submerged arc automatic welding on the cover surface so as to achieve the purpose of weldingAnd controlling the welding deformation, and filling equal amount of weld metal into the weld in an inner and outer alternate welding mode.
S3, single-circle internal reinforcement: in the single circle of each segment, the segment single circles of the first segment 101 and the eighth segment 108 at two ends of the cylinder body are internally reinforced, firstly turning lifting lugs are installed on the first segment 101 and the eighth segment 108, the segment single circles of the first segment 101 and the eighth segment 108 which are rolled and welded are hoisted and turned to a horizontal jig, an inner ring plate is installed in the first segment 101, an inner ring plate 201 and a cross brace 202 are installed in the eighth segment 108, and the ovality is measured after the installation is finished as shown in fig. 2 and 3.
S4, vertically welding and splicing the cylinder body: installing turning lifting lugs on the second section 102 and the seventh section 107, turning over and lifting the seventh section 107 to a station to be vertically welded and spliced with an eighth section 108 on a horizontal jig, turning over and lifting the second section 102 to the station to be vertically welded and spliced with a first section 101 on the horizontal jig as shown in fig. 4, and performing flaw detection after welding as shown in fig. 5;
during vertical welding and splicing, the seventh segment and the eighth segment, and the first segment and the second segment respectively use a quartering line as a reference, and the error of a reference line is less than or equal to 1 mm; continuous backing welding is carried out on the outer side of the segments during vertical welding splicing, the welding line is multilayer and multi-channel, and the inner side is subjected to groove welding;
the longitudinal seam of the barrel is staggered by 180 degrees, the deviation of the quartering line is less than or equal to 1mm, the dislocation deviation of the butt joint positions of the upper barrel and the lower barrel is less than or equal to 2mm, and the circumferential direction is uniform;
s5, grouping the remaining cylinder segments:
s5.1, preparing a pairing device: finite element analysis and calculation are carried out on the suction barrel in the early stage, under the working condition of the roller frame 1, the self weight of the barrel 10 causes obvious downwarping displacement, the welding seam of the barrel 10 is easy to crack, the stress of the contact point of the barrel 10 and the roller frame 1 exceeds the standard, the barrel 10 is caused to deform plastically, the original assembling device formed by the roller frame 1 cannot meet the manufacturing requirement of the barrel 10 of the suction barrel, the original assembling device formed by the roller frame 1 is structurally modified, lateral blocking supports 2 are respectively added on two sides of the roller frame 1, and the segmented side faces of the barrel 10 are supported through the lateral blocking supports 2 so as to increase the contact point with the segmented barrel 10;
s5.2, turning over and hoisting the seventh section 107 and the eighth section 108 which are subjected to vertical welding to a pairing device by using a travelling crane, wherein in the turning over and hoisting process, the contact part of the steel wire rope and the section of the cylinder body 10 is subjected to wrap angle treatment, and the turning over and hoisting schematic diagram is shown in FIG. 6;
s5.3, hoisting the sixth section 106 to a pairing device for pairing, completing pairing by means of a traveling crane due to the fact that no reinforcing structure exists in the sixth section 106, completing continuous backing welding after the sixth section 106 and the seventh section 107 are paired, wherein the backing welding is multi-layer and multi-channel, the thickness is not smaller than 15mm, detecting whether the barrel 10 sections deform or not, measuring the straightness, continuing to pair the rest barrel 10 sections after no error exists, and a schematic diagram of pairing the sixth section 106 and the seventh section 107 is shown in FIG. 7;
s5.4, sequentially hoisting the fifth section 105, the fourth section 104 and the third section 103 to a pairing device respectively for pairing, wherein the pairing mode is the same as that of the sixth section 106, the schematic diagram after pairing is shown in figure 8, continuous backing welding is carried out after pairing is finished, the backing welding is multilayer and multi-pass,
s5.5, turning over and hoisting the first section 101 and the second section 102 which are subjected to vertical welding to a fitting device by using a travelling crane, fitting the second section 102 and the third section 103, wherein the schematic diagram after fitting is shown in FIG. 9, continuous backing welding is performed after fitting, the backing welding is multi-layer and multi-pass, and the barrel subjected to fitting is hoisted to a circular seam station after detection is completed;
during hoisting, 2 traveling cranes are adopted for hoisting, the hoisting points are close to the reinforced position of the cylinder 10, the hoisting is stable during hoisting, if the cylinder 10 is in an inclined state, the hoisting is stopped immediately, the position is adjusted, and the cylinder 10 is ensured to be in a horizontal state after the hoisting;
s5.6, girth welding: hoisting the cylinder 10 to a circular seam roller carrier, before circular seam welding, pulling a steel wire rope along the length direction of the cylinder 10 at three radial points of 0 degree, 120 degree and 240 degree of the cylinder to check the straightness of the cylinder, during circular seam welding, firstly welding a large opening on the inner side of the cylinder 10, then performing carbon gouging on the outer side of the cylinder 10, then welding, welding the circular seam of the cylinder by submerged arc welding, and performing flaw detection after welding to finish the manufacture of the cylinder 10.
The assembling device in step S5 is used for supporting the barrel 10 when the barrel 10 is assembled, as shown in fig. 10 and 11, the assembling device includes a roller frame 1, rollers of the roller frame 1 are disposed on two sides of the bottom of the barrel 10, the rollers of the roller frame 1 are disposed on a supporting seat of the roller frame 11, the roller frame 1 is a general standard component or a component known to those skilled in the art, and the structure and principle thereof are known to those skilled in the art through technical manuals or through routine experimental methods, and will not be described again.
Lateral retaining supports 2 are respectively arranged on two sides of the roller frame 1, and the lateral retaining supports 2 support the lateral surface of the barrel 10 to increase the contact point with the barrel 10.
Hinged plates 25 are respectively installed on two sides of the top of the base 21, a flat plate is arranged at the bottom of the hinged plates 25, the hinged plates 25 are vertically arranged with the flat plate, the hinged plates 25 are integrally connected with the flat plate, the flat plate is fixedly connected with the base 21 through bolts, a support frame 22 and an adjusting frame 23 are respectively hinged on the two hinged plates 25, the bottom end of the support frame 22 is hinged with the hinged plate 25 arranged close to the roller frame 1, the bottom end of the adjusting frame 23 is hinged with the hinged plate 25 arranged far away from the roller frame 1, the upper part of the support frame 22 is hinged with the top end of the adjusting frame 23, one side of the support frame 22 close to the adjusting frame 23 is connected with a connecting plate 26, the connecting plate 26 is integrally and vertically connected with a fixing plate, the fixing plate is fixedly connected with the support frame 22 through bolts, hinge holes are arranged on the connecting plate 26, the end part of the adjusting frame 23 is hinged with the connecting plate 26, and the positions of the hinged plates 25 and the connecting plate 26 can be adjusted, the angle of inclination of the support frame 22 can be adjusted.
The auxiliary roller 24 is installed on one side of the support frame 22 far away from the adjusting frame 23, the auxiliary roller 24 supports the cylinder 10, and the support node of the auxiliary roller 24 on the cylinder 10 can be adjusted by adjusting the inclination angle of the support frame 22.
The working principle of the assembly device is as follows: the two sides of the roller carrier 1 are connected with lateral blocking supports 2, and through the arrangement of the lateral blocking supports 2, the contact point of the assembly device and the cylinder body 10 can be increased, and the downwarping displacement of the cylinder body 10 and the local stress deformation of the position of the roller carrier 1 are prevented, so that the production requirement of a suction cylinder is met; the base 21 of the lateral blocking support 2 is arranged on an extension line of the supporting seat 11 of the roller frame 1, the base 21 of the lateral blocking support 2 is supported by the movable wheel and the fixed supporting plate 3, and the structure is stable; the support frame 22 and the alignment jig 23 that prop 2 are kept off to side direction all are connected fixedly through articulated slab 25 and base 21, articulated slab 25 can be adjusted as required with the hookup location of base 21, can adjust the distance between alignment jig 23 and the support frame 22 bottom, the position of the connecting plate 26 of support frame 22 bottom also can be adjusted, be convenient for adjust the inclination of support frame 22, in order to adjust supplementary gyro wheel 24 to the support node of barrel 10, alignment jig 23 is articulated with the top of support frame 22, alignment jig 23, form stable triangular structure between the base 21, bearing structure is more stable.
Aiming at the manufacturing of a large-diameter thin-wall suction barrel body, the barrel body is divided into 8 sections to be manufactured respectively, grooves, rolling circles and straight seam welding are formed on each barrel section, after the rolling circles, the barrel sections at the end parts are internally reinforced, the structural strength is ensured, and the procedures of smooth assembly, hoisting, transferring, turning over and the like of the barrel body are ensured; after the manufacturing of each section of the cylinder is finished, the first section and the second section, the seventh section and the eighth section are respectively subjected to vertical welding and splicing, and then the rest cylinder sections are sequentially assembled and welded by welding seams, so that the manufacturing process is optimized, the assembling time is effectively reduced, the assembling precision is improved, the safe construction is facilitated, and the method has important significance for improving the wind power manufacturing level; the assembly device is structurally modified, lateral blocking supports are added to the roller carriers, and the barrel is prevented from downwarping and local stress deformation by increasing the contact surface between the roller carriers and the barrel; because the diameter of the cylinder body is large, the requirement on the deformation in the welding process is high, a reasonable welding sequence is formulated, the problems of welding deformation and the like, stress concentration and the like caused by welding are solved, the manufacturing precision requirement of the suction cylinder body is ensured, the production efficiency is improved, and the stability of the quality is improved.
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 (9)
1. A manufacturing method of a large-diameter thin-wall suction cylinder body of offshore wind power is characterized by comprising the following steps: the method comprises the following steps:
s1, dividing the barrel into 8 sections, sequentially forming a first section, a second section, a third section, a fourth section, a fifth section, a sixth section, a seventh section and an eighth section from the top to the bottom of the barrel, and respectively manufacturing the sections;
s2, preparing each segment:
s2.1, cutting and blanking: measuring the size of a steel plate before blanking of the steel plate, and detecting whether the size meets the blanking requirement;
s2.2, sand washing: for each single circle of each segment, carrying out sand washing on the upper plane of the steel plate after blanking, wherein the sand washing plane corresponds to the outer side of the single circle of each segment;
s2.3, scribing: after the sand washing is finished, turning over the steel plate, ensuring that the sand washing surface faces downwards, drawing a width central line of the steel plate, a quartering line of the plate length and a pre-bending inspection line of the end part of the steel plate, and knocking sample punching holes at two ends of the line for subsequent inspection;
s2.4, forming a groove: after the marking-out inspection is qualified, a splicing groove is formed in the steel plate, and the groove is an X-shaped groove;
s2.5, steel plate rolling: one end of a steel plate is pre-bent through a plate bending machine, then the steel plate is rolled from the non-pre-bent end of the steel plate, auxiliary protection is achieved through a travelling crane in the rolling process, a clamp is arranged above the steel plate and pulls one side of the rolled steel plate, the steel plate is prevented from being downwarped in the rolling process, and when an auxiliary clamping point of the rolling passes through the highest point, a carrier roller on the upper portion of the plate bending machine needs to be jacked for auxiliary support;
s2.6, preheating the steel plate after being rolled, completing continuous backing welding of longitudinal seams on the outer side of the segmented single circle, installing a clamp code to protect the steel plate after welding, and performing flaw detection on the longitudinal seams of the segmented single circle;
s3, single-circle internal reinforcement: in the single circles of all the sections, internally reinforcing the sectional single circles of the first section and the eighth section at two ends of the cylinder body, firstly installing turning-over lifting lugs on the first section and the eighth section, hoisting and turning over the rolled and welded sectional single circles of the first section and the eighth section to a horizontal jig frame, installing an inner ring plate in the first section, installing an inner ring plate and a cross brace in the eighth section, and measuring the ellipticity after the installation is finished;
s4, vertically welding and splicing the cylinder body: installing turning lifting lugs on the second section and the seventh section, turning over and lifting the seventh section to a station for vertical welding and splicing with an eighth section on the horizontal jig, turning over and lifting the second section to the station for vertical welding and splicing with the first section on the horizontal jig, and performing flaw detection after welding is finished;
the longitudinal seam of the barrel is staggered by 180 degrees, the deviation of the quartering line is less than or equal to 1mm, and the dislocation deviation of the butt joint positions of the upper barrel and the lower barrel is less than or equal to 2 mm;
s5, grouping the remaining cylinder segments:
s5.1, preparing a pairing device: the structure of an assembly device formed by an original roller carrier is modified, lateral blocking supports are respectively added on two sides of the roller carrier, and the lateral blocking supports are used for supporting the side surface of the barrel section so as to increase the contact point with the barrel section;
s5.2, turning over and hoisting the seventh section and the eighth section which are subjected to vertical welding to a fitting device by using a travelling crane, and performing corner wrapping treatment on the contact part of the steel wire rope and the section of the cylinder in the turning-over and hoisting process;
s5.3, hoisting the sixth section to a fitting device for fitting, finishing fitting by means of a traveling crane due to the fact that no reinforcing structure is arranged in the sixth section, continuously performing backing welding after the sixth section and the seventh section are fitted, wherein the backing welding is multi-layer and multi-channel, the thickness is not less than 15mm, detecting whether the barrel section is deformed or not, measuring the straightness, and continuously fitting the rest barrel sections after no error;
s5.4, sequentially hoisting the fifth section, the fourth section and the third section to a pairing device respectively for pairing, wherein the pairing mode is the same as that of the sixth section, continuous backing welding is performed after the pairing is finished, and the backing welding is multi-layer and multi-pass;
s5.5, turning over and hoisting the first section and the second section which are subjected to vertical welding to a fitting device by using a travelling crane, fitting the second section and the third section, continuously performing backing welding after fitting, wherein the backing welding is multi-layer and multi-channel, and hoisting the barrel which is subjected to fitting to a circular seam station after detection is completed;
during hoisting, 2 traveling cranes are adopted for hoisting, the hoisting point is close to the reinforced position of the barrel, the hoisting is stable during hoisting, if the barrel is in an inclined state, the hoisting is stopped immediately, the position is adjusted, and the barrel is ensured to be in a horizontal state after the hoisting;
s5.6, girth welding: and hoisting the barrel to a circular seam roller frame, welding the circular seam of the barrel by submerged arc welding, and performing flaw detection after the welding is finished to finish the manufacture of the barrel.
2. The method for manufacturing the large-diameter thin-wall suction cylinder body of the offshore wind power generation according to claim 1, characterized by comprising the following steps: and in the step S2.5, after the steel plate is placed on the roller of the plate bending machine, the verticality between the steel plate and the roller of the plate bending machine is adjusted according to the central line and the inspection line of the steel plate.
3. The method for manufacturing the large-diameter thin-wall suction cylinder body of the offshore wind power generation according to claim 1, characterized by comprising the following steps: in the step S2.6, when the longitudinal seam welding is carried out on the rolled steel plate, backing welding is carried out on the outer side of the seam, and a flux-cored wire CO is adopted2The gas shielded welding method has the welding thickness of 8-10 mm,and (4) multilayer and multi-pass welding, adjusting the longitudinal joint to a flat welding position after backing welding, carrying out carbon planing on the root of the inner side of the welding joint, polishing a carburized layer until the carburized layer is white, filling the welding joint of the inner side and the outer side, carrying out submerged arc automatic welding on the cover surface, and filling equal amount of welding metal in a mode of alternately welding the inner side and the outer side to the welding joint in order to control welding deformation.
4. The method for manufacturing the large-diameter thin-wall suction cylinder body of the offshore wind power generation according to claim 1, characterized by comprising the following steps: in the step S4, the quartering line is used as a reference for the seventh segment and the eighth segment, and the first segment and the second segment during vertical welding and splicing, and the error of the reference line is less than or equal to 1 mm; and continuous backing welding is carried out on the outer side of the segments during vertical welding splicing, and the welding seam is multilayer and multi-channel, and is subjected to groove welding on the inner side.
5. The method for manufacturing the large-diameter thin-wall suction cylinder body of the offshore wind power generation according to claim 1, characterized by comprising the following steps: in the step S5.6, before girth welding, the steel wire rope is pulled along the length direction of the cylinder at three radial points of 0 °, 120 ° and 240 ° of the cylinder to check the straightness of the cylinder, and during girth welding, the large opening on the inner side of the cylinder is welded, and then the carbon on the outer side of the cylinder is gouged and then welded.
6. The method for manufacturing the large-diameter thin-wall suction cylinder body of the offshore wind power generation according to claim 1, characterized by comprising the following steps: the assembling device in the step S5 is used for supporting the barrel during barrel assembling, and includes a roller frame, rollers of the roller frame are disposed on two sides of the bottom of the suction barrel, the rollers of the roller frame are disposed on a support seat of the roller frame, two sides of the roller frame are respectively provided with a lateral retaining support, and a side surface of the suction barrel is supported through the lateral retaining supports to increase a contact point with the suction barrel;
the lateral retaining support comprises a base, a supporting frame, an adjusting frame and an auxiliary roller, wherein the base is arranged on the side surface of a supporting seat of the roller frame, the base and the supporting seat of the roller frame are fixedly connected through a bolt, the heights of the base and the supporting seat are the same, and the base and the supporting seat are arranged on the same horizontal line;
hinged plates are respectively installed on two sides of the top of the base and are fixedly connected with the base through bolts, a support frame and an adjusting frame are respectively hinged to the two hinged plates, the bottom end of the support frame is hinged to a hinged plate close to the roller frame, the bottom end of the adjusting frame is hinged to a hinged plate far away from the roller frame, and the upper portion of the support frame is hinged to the top end of the adjusting frame;
and one side of the support frame, which is far away from the adjusting frame, is provided with an auxiliary roller.
7. The assembly kit for manufacturing a suction tube of claim 6, wherein: the side bottom of the supporting seat of the roller carrier is provided with a fixed supporting plate, one end of the fixed supporting plate extends out of the supporting seat and is located below the base which is laterally blocked and supported, and the fixed supporting plate is fixedly connected with the supporting seat and the base respectively.
8. The assembly kit for manufacturing a suction tube of claim 6, wherein: the bottom of the roller carrier is provided with a movable wheel, and the bottom of the base of the lateral blocking support is also provided with a movable wheel.
9. The assembly kit for manufacturing a suction tube of claim 6, wherein: one side of the support frame, which is close to the adjusting frame, is connected with a connecting plate, the connecting plate is fixedly connected with the support frame through bolts, hinge holes are formed in the connecting plate, and the end part of the adjusting frame is hinged with the connecting plate.
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| CN202111475113.3A CN114083242A (en) | 2021-12-06 | 2021-12-06 | Manufacturing method of large-diameter thin-wall suction cylinder body of offshore wind power |
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| CN202111475113.3A CN114083242A (en) | 2021-12-06 | 2021-12-06 | Manufacturing method of large-diameter thin-wall suction cylinder body of offshore wind power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906734A (en) * | 2022-05-06 | 2022-08-16 | 渤海造船厂集团有限公司 | Code-free assembly device and method for manufacturing high-strength steel pressure container |
| CN115781182A (en) * | 2022-11-16 | 2023-03-14 | 中建五洲工程装备有限公司 | Truss tower switching section and manufacturing method thereof |
| CN116213981A (en) * | 2022-12-08 | 2023-06-06 | 中海福陆重工有限公司 | Construction process of large-diameter offshore wind power flange |
| CN117718623A (en) * | 2023-11-17 | 2024-03-19 | 启东中远海运海洋工程有限公司 | Method for constructing large crane base section |
-
2021
- 2021-12-06 CN CN202111475113.3A patent/CN114083242A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906734A (en) * | 2022-05-06 | 2022-08-16 | 渤海造船厂集团有限公司 | Code-free assembly device and method for manufacturing high-strength steel pressure container |
| CN115781182A (en) * | 2022-11-16 | 2023-03-14 | 中建五洲工程装备有限公司 | Truss tower switching section and manufacturing method thereof |
| CN116213981A (en) * | 2022-12-08 | 2023-06-06 | 中海福陆重工有限公司 | Construction process of large-diameter offshore wind power flange |
| CN117718623A (en) * | 2023-11-17 | 2024-03-19 | 启东中远海运海洋工程有限公司 | Method for constructing large crane base section |
| CN117718623B (en) * | 2023-11-17 | 2024-06-11 | 启东中远海运海洋工程有限公司 | Method for constructing large crane base section |
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