CN114505610A - Butt girth welding method for super-large fan installation construction sleeve cage - Google Patents
Butt girth welding method for super-large fan installation construction sleeve cage Download PDFInfo
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- CN114505610A CN114505610A CN202210309058.9A CN202210309058A CN114505610A CN 114505610 A CN114505610 A CN 114505610A CN 202210309058 A CN202210309058 A CN 202210309058A CN 114505610 A CN114505610 A CN 114505610A
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- 238000003466 welding Methods 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000009434 installation Methods 0.000 title claims abstract description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 17
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000022 bacteriostatic agent Substances 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 10
- 230000007797 corrosion Effects 0.000 claims description 10
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 10
- 239000003112 inhibitor Substances 0.000 claims description 10
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 10
- ICLYJLBTOGPLMC-KVVVOXFISA-N (z)-octadec-9-enoate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCC\C=C/CCCCCCCC(O)=O ICLYJLBTOGPLMC-KVVVOXFISA-N 0.000 claims description 5
- CHHHXKFHOYLYRE-UHFFFAOYSA-M 2,4-Hexadienoic acid, potassium salt (1:1), (2E,4E)- Chemical compound [K+].CC=CC=CC([O-])=O CHHHXKFHOYLYRE-UHFFFAOYSA-M 0.000 claims description 5
- 239000004254 Ammonium phosphate Substances 0.000 claims description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims description 5
- 235000019289 ammonium phosphates Nutrition 0.000 claims description 5
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 5
- 239000012964 benzotriazole Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 5
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 claims description 5
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 5
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 5
- 235000010241 potassium sorbate Nutrition 0.000 claims description 5
- 239000004302 potassium sorbate Substances 0.000 claims description 5
- 229940069338 potassium sorbate Drugs 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000001509 sodium citrate Substances 0.000 claims description 5
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 5
- 235000010288 sodium nitrite Nutrition 0.000 claims description 5
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 5
- 229940117013 triethanolamine oleate Drugs 0.000 claims description 5
- 229960004418 trolamine Drugs 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 2
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 2
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- BDOYKFSQFYNPKF-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;sodium Chemical compound [Na].[Na].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O BDOYKFSQFYNPKF-UHFFFAOYSA-N 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- Y02E10/727—Offshore wind turbines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a welding method for a butt circular seam of a lantern ring for the installation and construction of an ultra-large fan, which is used for completing the welding of the butt circular seam of the lantern ring for the installation and construction of the ultra-large fan through the processes of pre-welding, lantern ring center positioning and welding; the method comprises the following specific steps: (1) pretreatment in welding: deoiling and derusting the place needing welding by using a deoiling deruster; (2) positioning the center of the cage: positioning and aligning the upper ring beam, the middle ring beam and the lower ring beam; (3) welding: and welding the upper ring beam, the middle ring beam and the lower ring beam. According to the invention, the deoiling rust remover is used for deoiling and rust removing treatment at the position needing to be welded before welding, and the welding surface is pretreated, so that the firmness of the welding surface can be increased, and meanwhile, the special deoiling rust remover is used for treatment, so that the integral deoiling and rust removing effects are good; and the welding seam selects a back cover welding seam and a re-welding procedure, so that the welding firmness of the welding seam is further enhanced.
Description
Technical Field
The invention relates to the technical field related to girth welding methods, in particular to a butt girth welding method for a sleeving cage for installation and construction of an ultra-large fan.
Background
In recent years, new energy such as wind power and the like in China is rapidly developed, and the installation scale is continuously enlarged. As an important component of the wind power industry, the construction of offshore wind power is accelerated continuously, and remarkable development performance is obtained.
The offshore wind turbine foundation can be compared with the whole wind power plant. All wind power generation fans are fixed on a fan foundation, the fan foundation generally has a plurality of modes such as a single pile and a jacket, the construction period of the single pile is shortest, the single pile is the most common fan foundation at present, and a cage platform is arranged at the upper part of the single pile fan foundation after the single pile fan foundation is driven.
In the offshore wind power generation industry, the ring beam is directly placed on the bracket outside the single pile body of the fan under the common condition of the single pile fan pile body muff, and only 3 dovetail buckles are used as positioning points at most. The sleeve cage belongs to a steel structural member and is formed by splicing and welding a plurality of welding seams, the service life is directly influenced by the good and poor welding quality, but the service life is directly influenced by the poor welding quality during the butt girth welding of the conventional sleeve cage.
Disclosure of Invention
The invention aims to provide a butt girth welding method for a lantern ring in the installation and construction of an ultra-large fan, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a welding method for a butt annular seam of a lantern ring for mounting and constructing an ultra-large fan is characterized in that the butt annular seam of the lantern ring for mounting and constructing the ultra-large fan is welded through welding pretreatment, lantern ring center positioning and welding processes; the method comprises the following specific steps:
(1) pretreatment in welding: deoiling and derusting the place needing welding by using a deoiling deruster;
(2) positioning the center of the cage: positioning and aligning the upper ring beam, the middle ring beam and the lower ring beam;
(3) welding: and welding the upper ring beam, the middle ring beam and the lower ring beam.
Further, the deoiling rust remover in the step (1) is prepared from the following raw materials in parts by weight: 20-25 parts of hydrochloric acid, 1-3 parts of phosphoric acid, 10-12 parts of sodium citrate, 3-6 parts of dodecyl sulfuric acid, 4-7 parts of ammonium persulfate, 1-3 parts of disodium ethylene diamine tetraacetate, 6-12 parts of quartz sand, 1.5-3 parts of bacteriostatic agent, 1 part of passivator, 0.6 part of corrosion inhibitor and 45-60 parts of water.
Further, the bacteriostatic agent is one or more of peroxyacetic acid, ethylene oxide and potassium sorbate.
Further, the passivating agent is one or a combination of sodium nitrite, ammonium phosphate and hydrazine.
Furthermore, the corrosion inhibitor is one or combination of more of triethanolamine oleate, triethanolamine, sodium tripolyphosphate, hexamethylenetetramine and benzotriazole.
Further, the welding in the step (3) is performed through two steps of back cover welding seam and re-welding, and the specific steps are as follows:
a. sealing a bottom welding seam: carrying out bottom sealing welding seams on the base layer of the aligned upper-layer ring beam, the aligned middle ring beam and the aligned lower-layer ring beam;
b. re-welding: and (4) welding again on the outer surface of the back cover welding seam to form a multilayer welding seam, namely completing the welding process.
Further, the thickness of the back cover welding seam in the step (a) is 0.5-1.5 mm.
Further, the thickness of the multilayer welding seam in the step (b) is 2-4 mm.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the deoiling rust remover is used for deoiling and rust removing treatment at the position needing to be welded before welding, and the welding surface is pretreated, so that the firmness of the welding surface can be increased, and meanwhile, the special deoiling rust remover is used for treatment, so that the integral deoiling and rust removing effects are good; and the welding seam selects a back cover welding seam and a re-welding procedure, so that the welding firmness of the welding seam is further enhanced.
Drawings
FIG. 1 is a flow chart of a welding method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a flow chart of the welding method of the present invention.
Example 1
A welding method for a butt annular seam of a lantern ring for mounting and constructing an ultra-large fan is characterized in that the butt annular seam of the lantern ring for mounting and constructing the ultra-large fan is welded through welding pretreatment, lantern ring center positioning and welding processes; the method comprises the following specific steps:
(1) pretreatment in welding: deoiling and derusting the place needing welding by using a deoiling deruster;
(2) positioning the center of the cage: positioning and aligning the upper ring beam, the middle ring beam and the lower ring beam;
(3) welding: and welding the upper ring beam, the middle ring beam and the lower ring beam.
The deoiling rust remover in the step (1) is prepared from the following raw materials in parts by weight: 20 parts of hydrochloric acid, 1 part of phosphoric acid, 10 parts of sodium citrate, 3 parts of dodecyl sulfuric acid, 4 parts of ammonium persulfate, 1 part of ethylene diamine tetraacetic acid disodium, 6 parts of quartz sand, 1.5 parts of a bacteriostatic agent, 1 part of a passivator, 0.6 part of a corrosion inhibitor and 45 parts of water.
Possibly, the bacteriostatic agent is one or more of peracetic acid, ethylene oxide and potassium sorbate.
Possibly, the passivating agent is one or more of sodium nitrite, ammonium phosphate and hydrazine.
The corrosion inhibitor may be one or more of triethanolamine oleate, triethanolamine, sodium tripolyphosphate, hexamethylenetetramine and benzotriazole.
The welding in the step (3) may be performed through two steps of back-sealing welding and re-welding, and the specific steps are as follows:
a. sealing a bottom welding seam: and carrying out bottom sealing welding seams on the base layer of the aligned upper-layer ring beam, the aligned middle ring beam and the aligned lower-layer ring beam, wherein the thickness of the bottom sealing welding seams is 0.5 mm.
b. Re-welding: and (4) welding the outer surface of the back cover welding seam again to form a multilayer welding seam, wherein the thickness of the multilayer welding seam is 2mm, and thus the welding process is completed.
Example 2
A welding method for a butt annular seam of a lantern ring for mounting and constructing an ultra-large fan is characterized in that the butt annular seam of the lantern ring for mounting and constructing the ultra-large fan is welded through welding pretreatment, lantern ring center positioning and welding processes; the method comprises the following specific steps:
(4) pretreatment in welding: deoiling and derusting the place needing welding by using a deoiling deruster;
(5) positioning the center of the cage: positioning and aligning the upper ring beam, the middle ring beam and the lower ring beam;
(6) welding: and welding the upper ring beam, the middle ring beam and the lower ring beam.
The deoiling rust remover in the step (4) is prepared from the following raw materials in parts by weight: 25 parts of hydrochloric acid, 3 parts of phosphoric acid, 12 parts of sodium citrate, 6 parts of dodecyl sulfuric acid, 7 parts of ammonium persulfate, 3 parts of ethylene diamine tetraacetic acid disodium, 12 parts of quartz sand, 3 parts of a bacteriostatic agent, 1 part of a passivator, 0.6 part of a corrosion inhibitor and 60 parts of water.
Possibly, the bacteriostatic agent is one or more of peracetic acid, ethylene oxide and potassium sorbate.
Possibly, the passivating agent is one or more of sodium nitrite, ammonium phosphate and hydrazine.
The corrosion inhibitor may be one or more of triethanolamine oleate, triethanolamine, sodium tripolyphosphate, hexamethylenetetramine and benzotriazole.
The welding in the step (6) may be performed through two steps of back-sealing welding and re-welding, and the specific steps are as follows:
a. sealing a bottom welding seam: and (3) carrying out bottom sealing welding seams on the base layer of the aligned upper-layer ring beam, the aligned middle ring beam and the aligned lower-layer ring beam, wherein the thickness of the bottom sealing welding seams is 1.5 mm.
b. Re-welding: and (4) welding again on the outer surface of the back cover welding seam to form a multilayer welding seam, wherein the thickness of the multilayer welding seam is 4mm, and thus the welding process is completed.
Example 3
A welding method for a butt annular seam of a lantern ring for mounting and constructing an ultra-large fan is characterized in that the butt annular seam of the lantern ring for mounting and constructing the ultra-large fan is welded through welding pretreatment, lantern ring center positioning and welding processes; the method comprises the following specific steps:
(7) pretreatment in welding: deoiling and derusting the place needing welding by using a deoiling deruster;
(8) positioning the center of the cage: positioning and aligning the upper ring beam, the middle ring beam and the lower ring beam;
(9) welding: and welding the upper ring beam, the middle ring beam and the lower ring beam.
The deoiling rust remover in the step (7) is prepared from the following raw materials in parts by weight: 23 parts of hydrochloric acid, 2 parts of phosphoric acid, 11 parts of sodium citrate, 5 parts of dodecyl sulfuric acid, 5 parts of ammonium persulfate, 2 parts of ethylene diamine tetraacetic acid, 9 parts of quartz sand, 2 parts of a bacteriostatic agent, 1 part of a passivator, 0.6 part of a corrosion inhibitor and 52 parts of water.
Possibly, the bacteriostatic agent is one or more of peracetic acid, ethylene oxide and potassium sorbate.
Possibly, the passivating agent is one or more of sodium nitrite, ammonium phosphate and hydrazine.
The corrosion inhibitor may be one or more of triethanolamine oleate, triethanolamine, sodium tripolyphosphate, hexamethylenetetramine and benzotriazole.
The welding in the step (9) may be performed through two steps of back-sealing welding and re-welding, and the specific steps are as follows:
a. sealing a bottom welding seam: and carrying out bottom sealing welding seams on the base layer of the aligned upper-layer ring beam, the aligned middle ring beam and the aligned lower-layer ring beam, wherein the thickness of the bottom sealing welding seams is 1 mm.
b. Re-welding: and (4) welding the outer surface of the bottom sealing weld again to form a multilayer weld, wherein the thickness of the multilayer weld is 3mm, and thus the welding process is completed.
According to the invention, the deoiling rust remover is used for deoiling and rust removing treatment at the position needing to be welded before welding, and the welding surface is pretreated, so that the firmness of the welding surface can be increased, and meanwhile, the special deoiling rust remover is used for treatment, so that the integral deoiling and rust removing effects are good; and the welding seam selects a back cover welding seam and a re-welding procedure, so that the welding firmness of the welding seam is further enhanced.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described, and the content not described in detail in the specification belongs to the prior art known by persons skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A butt girth welding method for a lantern ring for installation and construction of an ultra-large fan is characterized by comprising the following steps: welding a butting annular seam of the lantern ring for the installation and construction of the ultra-large fan is completed through the processes of pre-welding treatment, lantern ring center positioning and welding; the method comprises the following specific steps:
(1) pretreatment in welding: deoiling and derusting the place needing welding by using a deoiling deruster;
(2) positioning the center of the cage: positioning and aligning the upper ring beam, the middle ring beam and the lower ring beam;
(3) welding: and welding the upper ring beam, the middle ring beam and the lower ring beam.
2. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 1, wherein: the deoiling rust remover in the step (1) is prepared from the following raw materials in parts by weight: 20-25 parts of hydrochloric acid, 1-3 parts of phosphoric acid, 10-12 parts of sodium citrate, 3-6 parts of dodecyl sulfuric acid, 4-7 parts of ammonium persulfate, 1-3 parts of disodium ethylene diamine tetraacetate, 6-12 parts of quartz sand, 1.5-3 parts of bacteriostatic agent, 1 part of passivator, 0.6 part of corrosion inhibitor and 45-60 parts of water.
3. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 2, wherein: the bacteriostatic agent is one or combination of peroxyacetic acid, ethylene oxide and potassium sorbate.
4. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 2, wherein: the passivating agent is one or a combination of sodium nitrite, ammonium phosphate and hydrazine.
5. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 2, wherein: the corrosion inhibitor is one or combination of more of triethanolamine oleate, triethanolamine, sodium tripolyphosphate, hexamethylenetetramine and benzotriazole.
6. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 1, wherein: the welding in the step (3) comprises two steps of back cover welding seam and re-welding, and the specific steps are as follows:
a. sealing a bottom welding seam: carrying out bottom sealing welding seams on the base layer of the aligned upper-layer ring beam, the aligned middle ring beam and the aligned lower-layer ring beam;
b. re-welding: and (4) welding again on the outer surface of the back cover welding seam to form a multilayer welding seam, namely completing the welding process.
7. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 6, wherein: the thickness of the back cover welding seam in the step (a) is 0.5-1.5 mm.
8. The butt girth welding method for the lantern ring for the installation and construction of the ultra-large fan as claimed in claim 6, wherein: the thickness of the multilayer welding seam in the step (b) is 2-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210309058.9A CN114505610A (en) | 2022-03-28 | 2022-03-28 | Butt girth welding method for super-large fan installation construction sleeve cage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210309058.9A CN114505610A (en) | 2022-03-28 | 2022-03-28 | Butt girth welding method for super-large fan installation construction sleeve cage |
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| CN114505610A true CN114505610A (en) | 2022-05-17 |
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| CN202210309058.9A Pending CN114505610A (en) | 2022-03-28 | 2022-03-28 | Butt girth welding method for super-large fan installation construction sleeve cage |
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