CN117464128B - Method for quickly carrying flange cylinder body in segmented construction mode - Google Patents
Method for quickly carrying flange cylinder body in segmented construction mode Download PDFInfo
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- CN117464128B CN117464128B CN202311537922.1A CN202311537922A CN117464128B CN 117464128 B CN117464128 B CN 117464128B CN 202311537922 A CN202311537922 A CN 202311537922A CN 117464128 B CN117464128 B CN 117464128B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000003466 welding Methods 0.000 claims abstract description 77
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 4
- 210000001503 joint Anatomy 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 6
- 229910001882 dioxygen Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000002087 whitening effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K9/32—Accessories
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a method for quickly carrying a flange cylinder body of a huge offshore wind turbine installation platform in a segmented manner, which relates to the technical field of crane base manufacture and comprises the following steps of: s1, preparing a cylinder section and a flange section; s2, drawing a ground sample line on a segment construction overlap joint field; s3, arranging a flange jig along the ground sample contour line; s4, assembling a flange on the flange jig frame, sealing the flange section by utilizing a U-shaped clamping code and installing a Chinese character 'Mi' support; s5, preheating and welding each section of the flange; s6, marking out an outer frame mounting position line of the sectional cylinder and a seam line of the sectional cylinder; s7, hoisting and sealing the segmented cylinder; s8, preheating and welding the segmented cylinder; s9, welding the segmented cylinder body and the flange; s10, removing the flange. According to the invention, the flange jig is used for sealing the segmented cylinder body and the segmented flange, so that the lap joint working efficiency is improved, and the manufacturing precision and the manufacturing efficiency of the cylinder body and the flange are also improved.
Description
Technical Field
The invention relates to the technical field of flange cylinder manufacturing, in particular to a method for quickly carrying a flange cylinder of a large crane base in a sectional construction mode.
Background
The flange in the large flange cylinder of the crane base is a large flange, and the large flange is a flange exceeding the size specified by relevant departments of the country. Generally refers to a flange having a diameter of 10m or more. The product is manufactured by adopting sectional welding.
At present, the manufacturing precision and the manufacturing efficiency of the large flange and the cylinder cannot be both achieved, and in order to improve the manufacturing precision of the large flange, a relatively long manufacturing time is required, so that the manufacturing efficiency is not high under the condition of improving the manufacturing precision.
In the prior art, in the lap joint process of the large flange cylinder, the cylinder part and the flange part are finished respectively, and then the complete flange and the complete cylinder part are welded together, so that the processing process has low efficiency.
Disclosure of Invention
The invention aims to provide a method for quickly carrying a flange cylinder body in a sectional construction mode, which not only improves the lap joint working efficiency, but also improves the manufacturing precision and the manufacturing efficiency of the cylinder body and the flange.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for quickly carrying flange cylinder section construction comprises the following steps:
Step S1, preparing a barrel section and a flange section: drawing a cylinder and flange drawing, dividing the cylinder and the flange into a plurality of sections, and respectively manufacturing a cylinder section and a flange section according to the requirements of the cylinder and the flange drawing;
Step S2, drawing a ground sample line on a segment construction overlap joint field: building ground of overlapping sites in sections, drawing out ground-like cross lines, marking the center of a flange at the crossing point of the ground-like cross lines, and knocking out ocean punching points; marking out a ground sample contour line of the inner diameter and the outer diameter of the flange according to the central point, and marking out a flange joint plate suture line and a 16 bisector on the ground sample contour line;
Step S3, arranging a flange jig along the ground sample contour line: arranging the manufactured flange jig frames along the outline of the ground sample, and fixing the flange jig frames on the ground of the segment construction overlap joint field; drawing an outer diameter contour line on a flange jig frame by using a total station, and knocking out ocean punching points;
S4, splicing the flange on the flange jig frame, sealing the flange section by utilizing the U-shaped clamping code and installing the Mi-shaped support: hoisting the flange sections onto the flange jig frames, wherein one flange section corresponds to three flange jig frames, the three flange jig frames are respectively supported at the middle part and two ends of the flange section, the flange sections are assembled according to the outer diameter contour lines, the ground sample cross lines and the flange butt joint plate stitching lines on the flange jig frames, after all the flange sections are assembled, the bayonets of the U-shaped clamping codes are downwards inserted onto the flange sections and positioned at the flange jig frames, and the U-shaped clamping codes are welded with the flange jig frames, so that the flange sections are in a state of being inserted into the U-shaped clamping codes, and gaps are reserved between the U-shaped clamping codes and the flange sections; the rice-shaped support comprises a center support pier, a plurality of radial support horizontal beams and a connecting plate, wherein the center support pier is arranged at the intersection point of a ground-like cross line, one end of the support horizontal beam is connected with the center support pier, the other end of the support horizontal beam is welded with a U-shaped clamping code through the connecting plate, and then the wedge-shaped metal block is inserted into a gap between the U-shaped clamping code and a flange section to fix the flange section;
Step S5, preheating and welding each section of the flange: preheating a welding spot area of the flange section by utilizing an electric heating plate; after preheating to a set temperature, starting to weld the welding spot areas of the flange sections, so that each flange section is connected into a complete flange;
S6, marking out an outer frame installation position line of the segmented cylinder and a joint line of the segmented cylinder: after the flange is welded, the U-shaped clamping code is removed, and an outer frame mounting position line of the segmented cylinder and a seam line of the segmented cylinder are marked on the upper surface of the flange;
s7, hoisting and sealing the segmented cylinder: lifting each section of the cylinder onto the upper surface of the flange by taking the mounting position line of the outer frame of the segmented cylinder and the seam line of the segmented cylinder as references, inserting the bayonet of the U-shaped sealing plate downwards onto the cylinder section after all the cylinder sections are assembled, welding the bayonet of the U-shaped sealing plate with the flange jig frame, enabling the cylinder section to be in a state of being inserted into the U-shaped sealing plate, inserting the wedge-shaped metal block into a gap between the U-shaped sealing plate and the normal cylinder, and fixing the cylinder section;
s8, preheating and welding the segmented cylinder;
S9, welding the segmented cylinder body and the flange;
Step S10, flange tire removal: and (3) removing the U-shaped sealing plate, separating the flange from the flange jig frame, and completing carrying of sectional construction of the cylinder body and the flange.
Further, in step S5, the specific welding method is as follows: s5.1, finishing welding of a groove 1/3 at a groove at the upper end part of the flange section, and finishing welding of the groove 1/3 after carbon planing and whitening are performed on the lower surface of the flange section; after cooling, measuring the flatness and radian of the flange section; s5.2, determining the sequence of the upper groove and the lower groove in the second welding according to the horizontal deviation value of the flatness in the first measured data, and measuring the flatness and radian of the flange section after cooling after 1/3 of the welding of the upper groove and the lower groove is completed; s5.3, determining the sequence of the grooves on the upper surface and the lower surface in the third welding according to the horizontal deviation value of the flatness in the second measurement data, finishing the welding of the remaining grooves on the upper surface and the lower surface by 1/3, and measuring the flatness and the radian of the flange section after cooling; s5.4, determining the sequence of the upper and lower grooves in the welding of the next groove according to the horizontal deviation value of the flatness in the measured data after the welding of the previous groove is finished until the welding of all the upper and lower grooves is finished; s5.5, after all the flanges are welded, removing the U-shaped clamping code, and measuring the flatness, the arc degree and the radius value of the whole welded flange.
Further, in step S5, after the flanges are all welded, the outer diameter of the flange is 20160mm, the inner diameter of the flange is 19100mm, the width of the flange is 530mm, and the thickness of the flange is 230mm; the flange is made of ASTM A694.
In step S1, the flange is divided into 8 flange segments, the 8 flange segments enclose a circle, the flange has 8 butt joints, and the bevel angle on the upper surface and the lower surface of each butt joint is 55 degrees; the cylinder is divided into 5 cylinder sections, and 5 cylinder sections enclose a circle, and 5 butt joints are arranged.
Further, the length of the U-shaped clamping code is not less than 960mm, the height is not less than 450mm, and the thickness is not less than 30mm; the length of the U-shaped sealing plate is not less than 2500mm, the height is not less than 350mm, the thickness is not less than 30mm, and the U-shaped sealing plate is made of E36 plates.
In step S5, the flange welding mode adopts a dioxygen welding WPS-950, the welding material adopts DW-A55LSR, and the heating temperature is more than 150 ℃.
In step S9, the welding mode of the flange and the cylinder body adopts a dioxygen welding WPS-763, the welding material adopts GFL-71NI, and the heating temperature is more than 150 ℃.
Further, in step S5 and step S8, preheating is performed using an electric heating plate, and a thermocouple is provided.
Further, the change in flatness is measured by pulling the wire, the change in radian is measured by using a circular arc template, and the change in radius is measured by using a tape measure.
The invention has the beneficial effects that: the assembly welding of the sectional cylinder body is performed on the upper surface of the assembled flange, the sectional cylinder body is sealed by means of the flange jig frame and the U-shaped sealing plate, and the positioned sections are prevented from being pulled away by other sections in the positioning process; according to the invention, the flange jig is used for sealing the segmented cylinder body and the segmented flange, so that the lap joint working efficiency is improved, and the manufacturing precision and the manufacturing efficiency of the cylinder body and the flange are also improved.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one skilled in the art without inventive effort from the following figures:
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a state diagram of the flange after sealing of the segments;
fig. 3 is a state diagram of the cylinder after sealing.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the present application will be described in further detail with reference to the accompanying drawings and the specific embodiments, and it should be noted that the embodiments of the present application and features in the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward rotation", "reverse", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1,2 and 3, a method for quickly carrying a flange cylinder by segment construction comprises the following steps:
Step S1, preparing a barrel section and a flange section: drawing a cylinder and flange drawing, dividing the cylinder and the flange into a plurality of sections, and respectively manufacturing a cylinder section and a flange section according to the requirements of the cylinder and the flange drawing; the flange is divided into 8 flange sections, the 8 flange sections 1 are enclosed into a circle, the flange is provided with 8 butt joints, and the bevel angle of the upper surface and the lower surface of each butt joint is 55 degrees. The cylinder body is divided into 5 cylinder body sections 8, and 5 cylinder body sections enclose a circle, and 5 butt joints are arranged.
Step S2, drawing a ground sample line on a segment construction overlap joint field: building ground of overlapping sites in sections, drawing out ground-like cross lines, marking the center of a flange at the crossing point of the ground-like cross lines, and knocking out ocean punching points; and (3) marking out the ground sample contour lines of the inner diameter and the outer diameter of the flange according to the central point, and marking out the seam line and the 16 bisectors of the flange joint plate on the ground sample contour lines.
Step S3, arranging a flange jig along the ground sample contour line: arranging the manufactured flange jig frames 2 along the outline of the ground pattern, and fixing the flange jig frames 2 on the ground of the segment construction overlap joint field; and drawing an outer diameter contour line on the flange jig frame by using a total station, and knocking out ocean punching points.
S4, splicing the flange on the flange jig frame 2, sealing the flange section 1 by utilizing the U-shaped clamping code 3, and installing the Mi-shaped support: hoisting the flange sections onto the flange jig frames, wherein one flange section corresponds to three flange jig frames, the three flange jig frames are respectively supported at the middle part and two ends of the flange section, the flange sections are assembled according to the outer diameter contour lines, the ground sample cross lines and the flange butt joint plate stitching lines on the flange jig frames, after all the flange sections are assembled, the bayonets of the U-shaped clamping codes are downwards inserted onto the flange sections and positioned at the flange jig frames, and the U-shaped clamping codes are welded with the flange jig frames, so that the flange sections are in a state of being inserted into the U-shaped clamping codes, and gaps are reserved between the U-shaped clamping codes and the flange sections; the rice word props including center support mound 4, a plurality of radial support horizontal beam 5 and connecting plate 6, installs the intersection department of ground appearance cross with center support mound, and the one end of support horizontal beam 5 is connected with center support mound 4, passes through connecting plate 6 with the other end of support horizontal beam 5 and U-shaped draw-in code 3 after welding, inserts in the clearance between U-shaped draw-in code and the flange section with wedge metal block, fixes the flange section. The length of the U-shaped clamping code is not less than 960mm, the height is not less than 450mm, and the thickness is not less than 30mm.
Step S5, preheating and welding each section of the flange: preheating a welding spot area of the flange section by utilizing an electric heating plate; after preheating to a set temperature, starting to weld the welding spot areas of the flange sections, so that each flange section is connected into a complete flange; the specific welding method comprises the following steps: s5.1, finishing welding of a groove 1/3 at a groove at the upper end part of the flange section, and finishing welding of the groove 1/3 after carbon planing and whitening are performed on the lower surface of the flange section; after cooling, measuring the flatness and radian of the flange section; s5.2, determining the sequence of the upper groove and the lower groove in the second welding according to the horizontal deviation value of the flatness in the first measured data, and measuring the flatness and radian of the flange section after cooling after 1/3 of the welding of the upper groove and the lower groove is completed; s5.3, determining the sequence of the grooves on the upper surface and the lower surface in the third welding according to the horizontal deviation value of the flatness in the second measurement data, finishing the welding of the remaining grooves on the upper surface and the lower surface by 1/3, and measuring the flatness and the radian of the flange section after cooling; s5.4, determining the sequence of the upper and lower grooves in the welding of the next groove according to the horizontal deviation value of the flatness in the measured data after the welding of the previous groove is finished until the welding of all the upper and lower grooves is finished; s5.5, after all the flanges are welded, removing the U-shaped clamping code, and measuring the flatness, the arc degree and the radius value of the whole welded flange. After the flanges are completely welded, the outer diameter of the flange is 20160mm, the inner diameter of the flange is 19100mm, the width of the flange is 530mm, and the thickness of the flange is 230mm; the flange is made of ASTM A694.
The flange welding mode adopts a dioxygen welding WPS-950, the welding material adopts DW-A55LSR, and the heating temperature is more than 150 ℃.
Preheating is performed by using an electric heating plate, and a thermocouple is provided.
The change of flatness is measured by pulling a steel wire, the change of radian is measured by using an arc template, and the change of radius is measured by using a tape measure.
S6, marking out an outer frame installation position line of the segmented cylinder and a joint line of the segmented cylinder: after the flange is welded, the U-shaped clamping code is removed, and a mounting position line of the outer frame of the segmented cylinder and a seam line of the segmented cylinder are marked on the upper surface of the flange 7.
S7, hoisting and sealing the segmented cylinder: lifting each section of the cylinder onto the upper surface of the flange 7 by taking the mounting position line of the outer frame of the segmented cylinder and the seam line of the segmented cylinder as references, inserting the bayonet of the U-shaped sealing plate 9 onto the cylinder section 8 downwards after all the cylinder sections are assembled, welding the bayonet of the U-shaped sealing plate 9 with the flange jig frame 2, enabling the cylinder section 8 to be in a state of being inserted into the U-shaped sealing plate, inserting the wedge-shaped metal block into a gap between the U-shaped sealing plate and the normal cylinder, and fixing the cylinder section; the length of the U-shaped sealing plate is not less than 2500mm, the height is not less than 350mm, the thickness is not less than 30mm, and the U-shaped sealing plate is made of E36 plates.
Step S8, preheating and welding the segmented cylinder: preheating is performed by using an electric heating plate, and a thermocouple is provided.
Step S9, welding the segmented cylinder body and the flange: the welding mode of the flange and the cylinder adopts a dioxygen welding WPS-763, the welding material adopts GFL-71NI, and the heating temperature is more than 150 ℃.
Step S10, flange tire removal: and (3) removing the U-shaped sealing plate, separating the flange from the flange jig frame, and completing carrying of sectional construction of the cylinder body and the flange.
Working principle: the assembly welding of the segmented cylinder body is carried out on the upper surface of the assembled flange, the segmented cylinder body is sealed by means of the flange jig frame and the U-shaped sealing plate, the positioned segments are prevented from being pulled away in the positioning process by other segments, the segmented cylinder body is sealed by means of the flange jig frame, the lap joint working efficiency is improved, and the manufacturing precision and the manufacturing efficiency of the cylinder body are improved.
According to the technology, the flange jig frame and the rice-shaped support are matched to effectively fix each flange section, so that the manufacturing precision and the manufacturing efficiency are greatly improved; the invention adopts an original welding method, detects in the welding process, can realize the adjustment of the flatness and the circular arc degree of the flange through the sequence of the upper and lower welding, and adopts the welding mode, thereby having high yield and low rework rate and further improving the working efficiency.
Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. The method for quickly carrying the flange cylinder body in the sectional construction mode is characterized by comprising the following steps of:
Step S1, preparing a barrel section and a flange section: drawing a cylinder and flange drawing, dividing the cylinder and the flange into a plurality of sections, and respectively manufacturing a cylinder section and a flange section according to the requirements of the cylinder and the flange drawing;
Step S2, drawing a ground sample line on a segment construction overlap joint field: building ground of overlapping sites in sections, drawing out ground-like cross lines, marking the center of a flange at the crossing point of the ground-like cross lines, and knocking out ocean punching points; marking out a ground sample contour line of the inner diameter and the outer diameter of the flange according to the central point, and marking out a flange joint plate suture line and a 16 bisector on the ground sample contour line;
Step S3, arranging a flange jig along the ground sample contour line: arranging the manufactured flange jig frames along the outline of the ground sample, and fixing the flange jig frames on the ground of the segment construction overlap joint field; drawing an outer diameter contour line on a flange jig frame by using a total station, and knocking out ocean punching points;
S4, splicing the flange on the flange jig frame, sealing the flange section by utilizing the U-shaped clamping code and installing the Mi-shaped support: hoisting the flange sections onto the flange jig frames, wherein one flange section corresponds to three flange jig frames, the three flange jig frames are respectively supported at the middle part and two ends of the flange section, the flange sections are assembled according to the outer diameter contour lines, the ground sample cross lines and the flange butt joint plate stitching lines on the flange jig frames, after all the flange sections are assembled, the bayonets of the U-shaped clamping codes are downwards inserted onto the flange sections and positioned at the flange jig frames, and the U-shaped clamping codes are welded with the flange jig frames, so that the flange sections are in a state of being inserted into the U-shaped clamping codes, and gaps are reserved between the U-shaped clamping codes and the flange sections; the rice-shaped support comprises a center support pier, a plurality of radial support horizontal beams and a connecting plate, wherein the center support pier is arranged at the intersection point of a ground-like cross line, one end of the support horizontal beam is connected with the center support pier, the other end of the support horizontal beam is welded with a U-shaped clamping code through the connecting plate, and then the wedge-shaped metal block is inserted into a gap between the U-shaped clamping code and a flange section to fix the flange section;
Step S5, preheating and welding each section of the flange: preheating a welding spot area of the flange section by utilizing an electric heating plate; after preheating to a set temperature, starting to weld the welding spot areas of the flange sections, so that each flange section is connected into a complete flange;
S6, marking out an outer frame installation position line of the segmented cylinder and a joint line of the segmented cylinder: after the flange is welded, the U-shaped clamping code is removed, and an outer frame mounting position line of the segmented cylinder and a seam line of the segmented cylinder are marked on the upper surface of the flange;
S7, hoisting and sealing the segmented cylinder: lifting each barrel section to the upper surface of a flange by taking the mounting position line of the outer frame of the segmented barrel and the seam line of the segmented barrel as references, inserting the bayonet of the U-shaped sealing plate downwards onto the barrel section after all barrel sections are assembled, welding the bayonet of the U-shaped sealing plate with a flange jig frame, enabling the barrel section to be in a state of being inserted into the U-shaped sealing plate, inserting a wedge-shaped metal block into a gap between the U-shaped sealing plate and the barrel section, and fixing the barrel section;
s8, preheating and welding the segmented cylinder;
S9, welding the segmented cylinder body and the flange;
Step S10, flange tire removal: and (3) removing the U-shaped sealing plate, separating the flange from the flange jig frame, and completing carrying of sectional construction of the cylinder body and the flange.
2. The method for quickly carrying the flange cylinder segment construction according to claim 1, wherein the method comprises the following steps: in step S5, the specific welding method is as follows: s5.1, finishing welding of a groove 1/3 at a groove at the upper end part of the flange section, and finishing welding of the groove 1/3 after carbon planing and whitening are performed on the lower surface of the flange section; after cooling, measuring the flatness and radian of the flange section; s5.2, determining the sequence of the upper groove and the lower groove in the second welding according to the horizontal deviation value of the flatness in the first measured data, and measuring the flatness and radian of the flange section after cooling after 1/3 of the welding of the upper groove and the lower groove is completed; s5.3, determining the sequence of the grooves on the upper surface and the lower surface in the third welding according to the horizontal deviation value of the flatness in the second measurement data, finishing the welding of the remaining grooves on the upper surface and the lower surface by 1/3, and measuring the flatness and the radian of the flange section after cooling; s5.4, determining the sequence of the upper and lower grooves in the welding of the next groove according to the horizontal deviation value of the flatness in the measured data after the welding of the previous groove is finished until the welding of all the upper and lower grooves is finished; s5.5, after all the flanges are welded, removing the U-shaped clamping code, and measuring the flatness, the arc degree and the radius value of the whole welded flange.
3. The method for quickly carrying the flange cylinder segment construction according to claim 2, wherein the method comprises the following steps: in the step S5, after all the flanges are welded, the outer diameter of the flange is 20160mm, the inner diameter of the flange is 19100mm, the width of the flange is 530mm, and the thickness of the flange is 230mm; the flange is made of ASTM A694.
4. A method for rapid loading of flange cylinder segment construction according to claim 3, characterized in that: in the step S1, the flange is divided into 8 flange sections, the 8 flange sections are enclosed into a circle, the flange is provided with 8 butt joints, and the bevel angle of the upper surface and the lower surface of each butt joint is 55 degrees; the cylinder is divided into 5 cylinder sections, and 5 cylinder sections enclose a circle, and 5 butt joints are arranged.
5. The method for quickly carrying the flange cylinder segment construction according to claim 1, wherein the method comprises the following steps: the length of the U-shaped clamping code is not less than 960mm, the height is not less than 450mm, and the thickness is not less than 30mm; the length of the U-shaped sealing plate is not less than 2500mm, the height is not less than 350mm, the thickness is not less than 30mm, and the U-shaped sealing plate is made of E36 plates.
6. The method for quickly carrying the flange cylinder segment construction according to claim 1, wherein the method comprises the following steps: in the step S5, the flange welding mode adopts a dioxygen welding WPS-950, the welding material adopts DW-A55LSR, and the heating temperature is more than 150 ℃.
7. The method for quickly carrying the flange cylinder segment construction according to claim 1, wherein the method comprises the following steps: in the step S9, the welding mode of the flange and the cylinder adopts a dioxygen welding WPS-763, the welding material adopts GFL-71NI, and the heating temperature is more than 150 ℃.
8. The method for quickly carrying the flange cylinder segment construction according to claim 1, wherein the method comprises the following steps: in step S5 and step S8, preheating is performed using an electric heating plate, and a thermocouple is provided.
9. The method for quickly carrying the flange cylinder segment construction according to claim 2, wherein the method comprises the following steps: the change of flatness is measured by pulling a steel wire, the change of radian is measured by using an arc template, and the change of radius is measured by using a tape measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537922.1A CN117464128B (en) | 2023-11-17 | 2023-11-17 | Method for quickly carrying flange cylinder body in segmented construction mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423825A (en) * | 2011-09-07 | 2012-04-25 | 无锡市创新化工设备有限公司 | On-site splicing process of large-sized vacuum flange |
| CN107876943A (en) * | 2017-11-30 | 2018-04-06 | 南通蓝岛海洋工程有限公司 | A kind of building technology of wind-power tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6460007B1 (en) * | 2000-03-20 | 2002-10-01 | Daimlerchrysler Corporation | Method and apparatus for determination of resistance spot welded flange width |
| CN113020759B (en) * | 2021-02-26 | 2022-06-17 | 南通振华重型装备制造有限公司 | Construction method for connecting large jacket foundation transition section with finished flange |
| CN113814589B (en) * | 2021-09-02 | 2022-11-25 | 中船澄西船舶修造有限公司 | Method for controlling splicing precision of oversized flange |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423825A (en) * | 2011-09-07 | 2012-04-25 | 无锡市创新化工设备有限公司 | On-site splicing process of large-sized vacuum flange |
| CN107876943A (en) * | 2017-11-30 | 2018-04-06 | 南通蓝岛海洋工程有限公司 | A kind of building technology of wind-power tower |
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