CN116214084A - Preparation method of wind power generation tower barrel - Google Patents

Preparation method of wind power generation tower barrel Download PDF

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Publication number
CN116214084A
CN116214084A CN202310151805.5A CN202310151805A CN116214084A CN 116214084 A CN116214084 A CN 116214084A CN 202310151805 A CN202310151805 A CN 202310151805A CN 116214084 A CN116214084 A CN 116214084A
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CN
China
Prior art keywords
welding
cylinder
section
flanges
flange
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CN202310151805.5A
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Chinese (zh)
Inventor
罗文斌
稂亚军
欧阳清
郑容超
唐明金
刘军
陈登萍
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Liangshan Zhongshui Hengyue New Energy Equipment Co ltd
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Liangshan Zhongshui Hengyue New Energy Equipment Co ltd
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Priority to CN202310151805.5A priority Critical patent/CN116214084A/en
Publication of CN116214084A publication Critical patent/CN116214084A/en
Pending legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • 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
    • B23K9/18—Submerged-arc welding
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/10—Metallic substrate based on Fe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2503/00—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00—Epoxy polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/28—Metals
    • 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

Abstract

The invention discloses a preparation method of a wind power generation tower cylinder, which comprises a single-section cylinder working procedure, wherein the single-section cylinder working procedure comprises blanking, rolling, longitudinal seam welding, rounding correction and ultrasonic nondestructive testing, and a plurality of single-section cylinders are prepared through the single-section cylinder working procedure; a primary team forming process, namely welding two flanges with a single-section cylinder in the single-section cylinder process, firstly positioning and attaching a single-section cylinder with the flange, checking that the staggered platform is qualified, positioning and spot welding the cylinder and the flange, and then welding the flange with a flange ring seam to finish the welding of the flange and the single-section cylinder; a large section of grouping procedure, namely sequentially grouping and positioning the single section of cylinders, and then carrying out girth welding, wherein all the single section of cylinders are positioned between the two flanges; and (3) assembling and welding the internal parts and the whole painting process, namely assembling and welding the door frame on each cylinder welded in the step (S3), cleaning the whole surface oil dirt, and performing sand blasting and painting to finish the preparation of the tower cylinder. Has the advantages of high qualification rate and high molding rate.

Description

Preparation method of wind power generation tower barrel
Technical Field
The invention relates to the technical field of mechanical manufacturing, in particular to a preparation method of a wind power generation tower barrel.
Background
The wind power tower is a tower pole for wind power generation, plays a supporting role for a wind generating set, takes wind energy as an important renewable energy source, and is being widely developed and applied in the global scope. The utilization of wind resources in China is important, the technical level of wind power manufacturing industry is improved, the single-machine capacity is enlarged to realize efficient automatic production, research and improvement are carried out on the stress analysis, the high-quality efficient low-cost welding groove technology, the large cone thick plate rolling technology, the thick plate submerged arc automatic welding and post-treatment technology, the tower barrel assembly control forming technology, the high-temperature stress relief technology, the large-piece lifting loading and unloading technology, the large-piece surface efficient corrosion prevention technology and the like of the traditional 2.0-3.0 megawatt wind power tower barrel equipment on the basis of the technical reserve and industrialization capacity of the traditional 2.0 megawatt wind power tower barrel equipment, and the enterprise product update iteration is pushed to the single-machine capacity large-scale step.
Disclosure of Invention
The invention aims to provide a preparation method of a wind power generation tower barrel, which has the advantages of high qualification rate and high forming rate.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a preparation method of a wind power generation tower cylinder comprises the following steps: s1, a single-section cylinder working procedure, wherein the single-section cylinder working procedure comprises blanking, rolling, longitudinal seam welding, rounding correction and ultrasonic nondestructive testing, and a plurality of single-section cylinders are prepared through the single-section cylinder working procedure; during blanking, numerical control cutting is used for blanking, scribing is conducted on the blanking steel plate, and grooves are cut; when in rolling, the blanking steel plate is pre-bent and then rolled into a cylinder, and finally the two ends are positioned and spot welded; during longitudinal seam welding, firstly welding an inner longitudinal seam, then carrying out back chipping treatment on the outer side, and finally welding an outer longitudinal seam; the roundness and the edge angle are checked through hydraulic correction during the rounding correction;
s2, a primary team forming process, namely welding two flanges with a single-section cylinder in the single-section cylinder process, firstly positioning and attaching a single-section cylinder with the flanges, checking that the staggered platform is qualified, positioning and spot welding the cylinder and the flanges, then welding the flanges together and welding the flange circular seams, and finishing the welding of the flanges and the single-section cylinder;
s3, a large section of grouping procedure, namely, grouping and positioning the remaining single section of cylinder in the S1 with the single section of cylinder welded with the flanges in the S2, and then performing girth welding, wherein all the single section of cylinder are positioned between the two flanges;
and S4, assembling and welding the internal parts and the whole painting process, namely assembling and welding the door frame on each cylinder welded in the step S3, cleaning the whole surface oil dirt, and performing sand blasting and painting to finish the preparation of the tower cylinder.
Further, in the single-section cylinder process, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is required before longitudinal seam welding, and post-welding stress relief treatment is required after longitudinal seam welding.
Further, in the primary team working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before welding the flange girth, and post-welding stress relief treatment is needed after girth welding.
Further, in the large section team working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before girth welding is carried out on the single section cylinder bodies, and post-welding stress relief treatment is carried out after girth welding.
Further, the flange is formed by integrally forging steel ingots or continuous casting round billets.
Further, in the internal fitting welding process, sand blasting is used for rust removal of the cylinder body, so that the surface roughness of the cylinder body is 40-80 mu m.
Further, the epoxy zinc-rich primer is adopted for brushing after sand blasting, wherein the weight content of zinc powder is not less than 80%, and the content of metallic zinc in the zinc powder is not less than 94%.
Compared with the prior art, the invention has the advantages that: welding a thick plate and a thick plate, performing submerged arc welding in a barrel until the inner side is welded to a cover surface, performing gouging on the outer side of the barrel by adopting a carbon arc gouging machine, polishing a carburized layer and molten slag on the surface after gouging by using a polishing machine until metallic luster is exposed, performing submerged arc welding, performing welding after the cover surface is welded to the cover surface, covering a longitudinal seam with asbestos, covering a welding seam, performing circular seam welding, placing a heating tool on a fixed support, starting a roller frame to rotate for two circles to uniformly heat the surface of the circular seam, preventing cracks from generating, and improving the product yield; the tower barrel single sections are assembled and formed, so that the misalignment amount of the assembled products is ensured to be within the tolerance range, and the production efficiency is improved; the cylinder body has the defects of welding spatter, welding lines, welding slag, undercut and the like before tower sand blasting, and the steel surface is treated through the processes of polishing and the like, so that enough surface roughness is ensured, paint adhesion is ensured, no tilting part is ensured, no visible lamination is ensured on the surface, no embedded sundries are ensured on the surface, the radius of a groove or a round groove caused by a mechanical appliance is ensured to be not less than 2mm, and smooth and flat serrated grooves are ensured. The method of shielding by adopting the bolts with equal diameters or the packaging paper before sand blasting protects all threaded holes before sand blasting, and the working efficiency is effectively improved. When the paint is sprayed, the corresponding paint is matched for three-layer spraying corrosion prevention, the dry film thickness of the epoxy zinc-rich primer, the epoxy iron-cloud intermediate paint and the polyurethane finish paint can be coated is strictly controlled, and the best corrosion prevention effect is striven for.
Drawings
FIG. 1 is a flow chart of a single-section cylinder process of the present invention;
FIG. 2 is a flow chart of the primary team making process of the present invention;
FIG. 3 is a flow chart of a large team organization process of the present invention;
FIG. 4 is a flow chart of the process of welding and overall painting of the internal parts of the present invention;
fig. 5 is a schematic view showing the structure of the pair spot welding of the present invention.
Detailed Description
The present invention will be further described below.
The embodiment provides a preparation method of a wind power generation tower, which comprises the following steps: s1, a single-section cylinder working procedure, wherein the single-section cylinder working procedure comprises blanking, rolling, longitudinal seam welding, rounding correction and ultrasonic nondestructive testing, and a plurality of single-section cylinders are prepared through the single-section cylinder working procedure;
during blanking, a numerical control cutting is used for blanking, scribing is carried out on a blanking steel plate, a groove is cut, a numerical control cutting machine is used for blanking, welding shrinkage allowance is added in a procedure, during cutting, slotting compensation is carried out on all steel plates according to the checking blanking size and four process axes of 0 degree, 90 degree, 180 degree and 270 degree are marked according to the thickness, and the information such as a cylinder section number, a steel plate furnace batch number, materials, specifications and the like is correctly marked on the upper left corner of the cylinder by using a steel stamp according to requirements; the steel seal mark is clear, the character height is 10mm, enough depth is needed, clear visibility is ensured after corrosion prevention, the base metal is prevented from being damaged as much as possible, meanwhile, in order to facilitate component identification and inspection, paint is used for writing the mark at the position where the cylinder is easy to see, all cylinder steel plates are provided with longitudinal and circular seam grooves, a semi-automatic flame cutting machine is used for cutting grooves, slag and ferric oxide are cleaned, the grooves are polished, truncated edges and the edges of the grooves are exposed within 30mm, the ferric oxide on the front and back surfaces of the steel plates are cleaned during numerical control blanking and groove cutting, if serious defects such as saw teeth and grooves occur, repair welding and polishing are performed in time, and the depth of cutting marks is not more than 0.5mm. The local cutting mark is not more than 2mm; the perpendicularity of the cutting edge and the surface is not more than 1.5mm; the verticality and parallelism between the edges and sides of the part must not be greater than half the tolerance of the corresponding dimensions.
When in rolling, the blanking steel plate is pre-bent and then rolled into a cylinder, and finally the two ends are positioned and spot welded; before rolling, checking whether the roller and the plate surface have impurities such as weld flash scrap iron or not, wherein the mechanical damage should be avoided on the plate surface in the rolling process, the part with serious flaw should be polished, and the defect repair of the steel plate should be executed according to the 5.4 th item in GB/T14977 under the condition that the minimum thickness of the steel plate is not less than; when the steel plate is rolled on the plate rolling machine, the steel plate is fully pre-bent, after the pre-bending is finished, a plurality of cylinder buses are drawn on the surface of the plate, when the steel plate is rolled, the upper roller of the plate rolling machine is aligned with the buses and is pressed downwards, the steel plate is rolled back and forth, and radian errors are checked at any time. The rolling direction of the steel plate is consistent with the rolling direction of the steel plate, the gap between the steel plate and the tile is smaller than 2mm after the steel plate is rolled for a plurality of times, and the longitudinal joint is performed after the radian meets the requirement. The method comprises the steps of paying attention to the direction of a groove when a coil is rolled, a large groove is arranged on the inner side of a cylinder, forced assembly is not allowed when longitudinal joints of the coil are butted, a welding joint inspection gauge and a 150mm steel plate ruler (or a welding joint inspection ruler) are used for inspecting and controlling the butt joint gap, the offset and the offset of the cylinder, then localized welding is carried out, the longitudinal joint is butted and welded on the outer side of the cylinder, and arc striking/extinguishing plates are respectively arranged at two ends of the longitudinal joint (when welding test plates are arranged, the arc striking/extinguishing plates are required to be arranged after the welding test plates are arranged), and when the arc striking/extinguishing plates are arranged, the spot welding position is not allowed on the inner side of the cylinder. All the positioning welding uses manual welding rod arc welding, when welding, arc striking is only allowed at the welding seam, the parent metal of the cylinder body cannot be damaged, the positioning welding is ensured to be consistent with the welding seam quality, and the subsequent welding work and the welding seam quality are not influenced. Before the positioning welding, the bevel surface and all sundries, rust spots, greasy dirt and the like within 30mm range on the two sides of the bevel surface are polished by a grinder until the metallic luster is exposed. The positioning welding is carried out on the outer side of the cylinder section by adopting CO 2 And (5) gas shielded welding. The butt joint clearance is ensured to be 0.5-2mm during assembly spot welding, and the offset is measured<The stagger amount is less than or equal to 1.5mm and is 1mm as shown in figure 5.
During longitudinal seam welding, firstly welding an inner longitudinal seam, then carrying out back chipping treatment on the outer side, and finally welding an outer longitudinal seam; before and during welding, the groove surface and harmful sundries at the welding position are cleaned. The cleaning range should be free of oxide, greasy dirt, rust, moisture and other dirt. The relative humidity of the welding environment is less than 80%, the temperature is more than 0 ℃ (lower than 0 ℃), and the welding environment is heated to more than 15 ℃ within the range of 100mm at the welding position. If the outdoor operation is needed, effective measures are needed when rainy and snowy weather or wind speed is more than 10m/s, and the welding of the longitudinal seam can be performed after the cylindrical shell section is rolled, formed and inspected to be qualified. Before welding, a welder should check the quality, size, misalignment and the like of the groove assembly, and the unqualified person should be repaired and welded. Before welding, two sections of the joint are additionally provided with arc striking/extinguishing plates, the specification is that the thickness of the wall of the joint is multiplied by 100, and the bevel form of the arc striking/extinguishing plates is the same as that of a formal welding line. The longitudinal joint of the cylindrical shell is welded by submerged arc welding, firstly welding a groove welding line on the inner side of the cylindrical shell, and welding after gouging and back gouging of the carbon arc on the outer side, so that the full penetration of the welding line is ensured. The welding specification, the welding technical requirement and the like meet the requirements of technical protocols, process evaluation and welding technical regulations. The spatter of the welding slag must be removed after welding, and the appearance and size of the weld joint are self-checked. And (3) performing welding by adopting automatic submerged arc welding according to the welding technological procedure, wherein the inner side is welded firstly, and the slag and oxide between layers are thoroughly removed during multi-pass welding, so that preparation is made for a next welding line. The outer side adopts carbon arc gouging to gouge 100% back gouging, the straightness of the gouging is controlled, and a polishing machine is used for polishing two sides of the gouged groove until the metallic luster of the base metal is exposed, and then the outer side is welded. And after the welding is finished, the arc striking/extinguishing plate is planed, slag, splashing and the like are removed, and a welder number is beaten at the position, which is about 50mm away from the welding line, of the large opening of the pipe joint.
The roundness and the edge angle are checked through hydraulic correction during the rounding correction; and after the cylindrical shell longitudinal joint is welded, after the welding joint is thoroughly cooled, re-hanging the plate coiling machine for roundness correction, wherein in the correction process, sharp objects such as cushion blocks are not allowed to be adopted for cushion pressing, and after the cylindrical shell longitudinal joint is qualified for roundness correction, the cylindrical shell longitudinal joint can be reinforced in a mode of being supported by a Chinese character 'mi' according to specific conditions.
S2, a primary team forming process, namely welding two flanges with a single-section cylinder in the single-section cylinder process, firstly positioning and attaching a single-section cylinder with the flanges, checking that the staggered platform is qualified, positioning and spot welding the cylinder and the flanges, then welding the flanges together and welding the flange circular seams, and finishing the welding of the flanges and the single-section cylinder;
the flange and the cylinder body are assembled on a special flange assembling platform without a clearance in a non-forced way, the flange is subjected to nondestructive testing and the physical dimension rechecking before assembling, and the flange can be used after the rechecking is qualified. The flange group is required to check the platform regularly, and the flatness is required to be less than or equal to 1mm.
The flange and the cylinder section are assembled in a butt joint mode with aligned outer edges in principle, before the assembly, the circumferences of pipe orifices at the butt joint positions of the flange and the cylinder section are measured by using steel tape measures respectively at the disk openings, the theoretical dislocation amount in the circumferential direction is calculated, and the circumference is uniformly transited for assembly under the condition that dislocation does not exceed the standard. If the calculated error of the whole circle is out of tolerance, the quality inspection engineer should be reported in time, and the pairing should not be forced.
Polishing and derusting, oil impurities with a polishing machine and the like for 30mm on the two sides of the groove of the butt joint cylinder; after assembly, the roundness of the cylinder section is adjusted, and an arc plate can be adopted to support the circle inside. When the first stage is manufactured, the flange stands upwards, and the flatness of the flange before welding is detected by a quality inspector before welding. The longitudinal seam of the cylinder body is positioned at the center of the two holes of the flange. After welding, the top flange was again raised face up and the flange flatness was checked by a quality inspector after welding.
For the cylinder flange, before welding with the tower, the inner circle end surface of the flange plate is required to be marked with a scriber to make the lines of 0 degree, 90 degree, 180 degree and 270 degree, three sample punching points are arranged on each line side by side for positioning, and the lines of 0 degree, 90 degree, 180 degree and 270 degree are marked with paint pens respectively for mounting, positioning and checking of the inner accessories.
S3, a large section of grouping procedure, namely, grouping and positioning the remaining single section of cylinder in the S1 with the single section of cylinder welded with the flanges in the S2, and then performing girth welding, wherein all the single section of cylinder are positioned between the two flanges;
after the adjacent cylinder sections are in butt joint, longitudinal joints are staggered by 180 degrees, longitudinal joints of odd sections are located at 180 degrees, longitudinal joints of even sections are located at 0 degrees, and corresponding process axes on all cylinder sections are located on the same bus of the tower section. The adjacent sections are aligned in an outer diameter alignment (the reinforcing plates are aligned in the middle). The circumferences of two butting pipe orifices are measured respectively before butting each cylinder section, the theoretical dislocation quantity in the circumferential direction is calculated, and under the condition that dislocation is not out of tolerance, circumferential uniform transition pairing is carried out, so that the whole pairing is ensured not to be out of tolerance. And each butt joint section of cylinder body uses a steel tape to measure the length of the bus of the tower section at four process axes, and the position with the deviation exceeding 2mm is subjected to polishing treatment before the next butt joint or the treatment of reserving a pairing gap in the butt joint process so as to control the overall size of the tower section not to be out of tolerance. Before each butt joint, the whole butt joint welding seam of the upper section is subjected to localized welding by manual welding rod arc welding or gas shielded welding outside the tower, and the localized welding only allows arc striking at the welding seam, so that the base material of the cylinder body cannot be damaged.
And the material, thickness and groove form of the arc striking and extinguishing plates are consistent with those of welded base materials, and the specification of the arc striking and extinguishing plates is more than or equal to 100mmX100mm. The beginning end of the girth weld is not allowed to be positioned in the range of 300mm around the longitudinal seam. The length of the longitudinal weld is at least 100mm, and the heat loss of the welding machine is regulated on the lead-out plate. The circumferential weld must have an overlap of at least 50 mm. The method of removing the striking/extinguishing plate should adopt a cutting method, the method of using knocking is strictly forbidden, and the cutting place should be flattened.
And S4, assembling and welding the internal parts and the whole painting process, namely assembling and welding the door frame on each cylinder welded in the step S3, cleaning the whole surface oil dirt, and performing sand blasting and painting to finish the preparation of the tower cylinder.
The door frame is a rolled door frame, and before the door frame is installed, scribing is carried out at the corresponding position of the door frame at the outer side of the lower section cylinder body according to the requirement, cutting is carried out, the tool is installed before cutting to prevent the deformation of the cutting position of the door frame, and the jack is tightened for two times in the vertical direction and the 45-degree direction successively. The groove is accurate during cutting, the welding deformation is reduced as much as possible, and the deformation of the cylinder body and the flange is avoided. Before assembly, the groove surface of the cylinder body and the welding areas of the door frame within the range of 30mm on both sides of the groove surface should be polished and cleaned, and metallic luster is exposed. The assembling clearance between the door frame and the cylinder body is controlled to be 2-3 mm. When in assembly, the welding bead joint between the door frame and the barrel plate is ensured to be flat as much as possible, and the welding bead joint should not be raised or recessed. The door frame and the cylinder are welded after the flanges are welded, and the inner joint is arranged at the middle part and the outer joint is arranged at the upper and lower parts during welding. The welding of the door frame and the cylinder adopts gas shielded welding, and the welding seam is completely penetrated. The surface of the welding seam should be smooth and flat, the defects of welding leakage, burning-through, cracks, slag inclusion, undercut and the like are avoided, splashing is removed after welding, when the door frame is welded, the door frame and the two parts of the welding cylinder body must be fully preheated, the two parts must be heated to 100-125 ℃ at the position 100mm away from the welding seam, the temperature is checked and recorded by using a thermometer, and the whole welding process is not lower than the preheating temperature. Adopting dry sand blasting to remove rust before spraying paint, wherein the surface roughness of a substrate is 40-70 mu m, compressed air for sand blasting is required to be dried, sand materials are required to have edges, clean and dry, oil stains are not allowed to exist, free matters and feldspar of soluble salts are not allowed, and the granularity is between 0.5mm and 2mm (GB 9795-88); the sand blasting rust-proof surface reaches the grade of 3.2.3 rust removal of GB8923-88, and the sand blasting surface should be sprayed as soon as possible, with the interval not exceeding 4 hours.
Further, in the single-section cylinder process, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is required before longitudinal seam welding, and post-welding stress relief treatment is required after longitudinal seam welding.
Further, in the primary team working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before welding the flange girth, and post-welding stress relief treatment is needed after girth welding.
Further, in the large section team working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before girth welding is carried out on the single section cylinder bodies, and post-welding stress relief treatment is carried out after girth welding.
Further, the flange is formed by integrally forging steel ingots or continuous casting round billets.
Further, in the internal fitting welding process, sand blasting is used for rust removal of the cylinder body, so that the surface roughness of the cylinder body is 40-80 mu m.
Further, the epoxy zinc-rich primer is adopted for brushing after sand blasting, wherein the weight content of zinc powder is not less than 80%, and the content of metallic zinc in the zinc powder is not less than 94%.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A preparation method of a wind power generation tower is characterized by comprising the following steps of: the method comprises the following steps: s1, a single-section cylinder working procedure, wherein the single-section cylinder working procedure comprises blanking, rolling, longitudinal seam welding, rounding correction and ultrasonic nondestructive testing, and a plurality of single-section cylinders are prepared through the single-section cylinder working procedure; during blanking, numerical control cutting is used for blanking, scribing is conducted on the blanking steel plate, and grooves are cut; when in rolling, the blanking steel plate is pre-bent and then rolled into a cylinder, and finally the two ends are positioned and spot welded; during longitudinal seam welding, firstly welding an inner longitudinal seam, then carrying out back chipping treatment on the outer side, and finally welding an outer longitudinal seam; the roundness and the edge angle are checked through hydraulic correction during the rounding correction;
s2, a primary team forming process, namely welding two flanges with a single-section cylinder in the single-section cylinder process, firstly positioning and attaching a single-section cylinder with the flanges, checking that the staggered platform is qualified, positioning and spot welding the cylinder and the flanges, then welding the flanges together and welding the flange circular seams, and finishing the welding of the flanges and the single-section cylinder;
s3, a large section of grouping procedure, namely, grouping and positioning the remaining single section of cylinder in the S1 with the single section of cylinder welded with the flanges in the S2, and then performing girth welding, wherein all the single section of cylinder are positioned between the two flanges;
and S4, assembling and welding the internal parts and the whole painting process, namely assembling and welding the door frame on each cylinder welded in the step S3, cleaning the whole surface oil dirt, and performing sand blasting and painting to finish the preparation of the tower cylinder.
2. The method for manufacturing a wind power generation tower according to claim 1, wherein: in the single-section cylinder working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before longitudinal seam welding, and post-welding stress relief treatment is needed after longitudinal seam welding.
3. The method for manufacturing a wind power generation tower according to claim 1, wherein: in the primary team working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before welding the flange girth, and post-welding stress relief treatment is needed after girth welding.
4. The method for manufacturing a wind power generation tower according to claim 1, wherein: in the large section team working procedure, when the thickness of the steel plate is more than or equal to 30mm, pre-welding preheating treatment is needed before girth welding is carried out on the single section cylinder bodies, and post-welding stress relief treatment is carried out after girth welding.
5. The method for manufacturing a wind power generation tower according to claim 1, wherein: the flange is formed by integrally forging steel ingots or continuous casting round billets.
6. The method for manufacturing a wind power generation tower according to claim 1, wherein: in the internal fitting and welding process, sand blasting is used for rust removal of the cylinder body, so that the surface roughness of the cylinder body is 40-80 mu m.
7. The method for manufacturing a wind power generation tower according to claim 6, wherein: and (3) brushing paint after sand blasting by adopting an epoxy zinc-rich primer, wherein the weight content of zinc powder is not less than 80%, and the content of metallic zinc in the zinc powder is not less than 94%.
CN202310151805.5A 2023-02-22 2023-02-22 Preparation method of wind power generation tower barrel Pending CN116214084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310151805.5A CN116214084A (en) 2023-02-22 2023-02-22 Preparation method of wind power generation tower barrel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310151805.5A CN116214084A (en) 2023-02-22 2023-02-22 Preparation method of wind power generation tower barrel

Publications (1)

Publication Number Publication Date
CN116214084A true CN116214084A (en) 2023-06-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310151805.5A Pending CN116214084A (en) 2023-02-22 2023-02-22 Preparation method of wind power generation tower barrel

Country Status (1)

Country Link
CN (1) CN116214084A (en)

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