CN114054994A - Corrosion welding repair method for angle steel interface of power transmission tower - Google Patents
Corrosion welding repair method for angle steel interface of power transmission tower Download PDFInfo
- Publication number
- CN114054994A CN114054994A CN202111251841.6A CN202111251841A CN114054994A CN 114054994 A CN114054994 A CN 114054994A CN 202111251841 A CN202111251841 A CN 202111251841A CN 114054994 A CN114054994 A CN 114054994A
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- Prior art keywords
- angle steel
- welding
- corrosion
- reinforced
- power transmission
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 100
- 239000010959 steel Substances 0.000 title claims abstract description 100
- 238000003466 welding Methods 0.000 title claims abstract description 51
- 238000005260 corrosion Methods 0.000 title claims abstract description 41
- 230000007797 corrosion Effects 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 27
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 239000003973 paint Substances 0.000 claims abstract description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 230000001680 brushing effect Effects 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910000746 Structural steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- B23P6/00—Restoring or reconditioning objects
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
Abstract
The invention relates to a power transmission tower angle steel interface corrosion welding repair method, which comprises the following steps: opening the concrete protective cap to expose a rusted area of the interface of the tower foot angle steel and the concrete protective cap; removing rust in a foot angle steel corrosion area of the power transmission tower; removing the coating and rust layer at the position needing to be welded; the reinforced angle steel in the tower foot angle steel is temporarily reinforced before being welded: welding the temporary reinforcing angle steel and the reinforced angle steel together by using a side surface fillet weld at the opening side of the reinforced angle steel; welding and repairing a corrosion area of the reinforced angle steel: welding the rusted area by using a butt weld; removing the temporary reinforcing angle steel, and polishing the welding area to meet the requirement of I-level fatigue welding seam; and brushing an anticorrosive paint on the welding area for anticorrosive treatment. According to the repairing method, under the condition that normal operation of the power transmission tower is not influenced, welding repair is carried out on corrosion of the angle steel interface of the tower foot, and the problem of angle steel corrosion of the tower foot of the power transmission tower and the concrete protective cap interface is solved.
Description
Technical Field
The invention relates to a method for repairing corrosion of an angle steel interface of a power transmission tower by welding.
Background
The power transmission iron tower is one of the most important infrastructures of the high-voltage power transmission line as a bearing structure of the high-voltage power transmission line, and the safety and the reliability of the power transmission iron tower are of great importance to the safety of a power system. The metal parts of the power transmission tower, such as the tower body, the tower foot, the grounding system and the like, can be corroded. Tower foot corrosion is a key and difficult point in all corrosion problems of iron towers. In order to prevent the tower foot from being corroded, a concrete protective cap is generally used to cover the tower foot, and the top surface of the protective cap is provided with not less than 10oThe inclination angle of (c). However, during our examination, it was found that about 2/3 of the protective cap tops were not or less than 10 degrees of inclinationoThe corrosion of the interface of the angle steel (or the tower foot shoe plate) and the protective cap is caused, and even the penetration corrosion of the angle steel at the connecting part of the tower foot shoe plate and the tower leg is caused, which seriously affects the safety of the power grid.
According to the safety evaluation criterion of the rusted iron tower, the treatment measures are processed according to different grades: the first-level component is not damaged and does not need to be processed; the secondary component, namely the component with the section loss rate less than 10 percent needs to take necessary reinforcing and repairing measures; the tertiary component, i.e. the component with the section loss rate of more than 10 percent, is recommended to be removed and replaced. In general, the diagonal member is relatively easy to replace, and the main member is difficult to replace. The existing treatment technical measures comprise that epoxy resin or zinc-rich anticorrosive paint is coated in a corrosion area, however, the mode has an unsatisfactory anticorrosive effect, and the tower foot part embedded in a cement cap cannot be recovered; secondly, the scheme of power transmission tower in-situ reinforcement is one of the schemes, namely reinforcement by an enlarged section method, but the method is more suitable for angle steel reinforcement of the area above the tower foot of the power transmission tower, and the reinforcement effect on corrosion of the angle steel of the tower foot of the power transmission tower and the interface of a concrete protective cap is not ideal.
Disclosure of Invention
The invention aims to provide a welding repair method for corrosion of an angle steel interface of a power transmission tower, which is used for welding and repairing the corrosion of the angle steel interface of a tower foot under the condition of not influencing the normal operation of the power transmission tower and solving the problem of angle steel corrosion of the angle steel interface of the tower foot of the power transmission tower and a concrete protective cap.
The technical scheme of the invention is as follows: a corrosion welding repair method for a steel angle interface of a power transmission tower is characterized by comprising the following steps:
(1) opening the concrete protective cap to expose a rusted area of the interface of the tower foot angle steel and the concrete protective cap;
(2) removing rust in a foot angle steel corrosion area of the power transmission tower; removing the coating and rust layer at the position needing to be welded;
(3) the reinforced angle steel in the tower foot angle steel is temporarily reinforced before being welded: welding the temporary reinforcing angle steel and the reinforced angle steel together by using a side surface fillet weld at the opening side of the reinforced angle steel;
(4) welding and repairing a corrosion area of the reinforced angle steel: welding the rusted area by using a butt weld;
(5) removing the temporary reinforcing angle steel, and polishing the welding area to meet the requirement of I-level fatigue welding seam;
(6) and brushing an anticorrosive paint on the welding area for anticorrosive treatment.
Further, in the step (2), a groove needs to be cut for the thicker steel.
Further, in the step (3), two side edges of the temporary reinforcing angle steel protrude out of two side edges of the reinforced angle steel, and an upper surface of a side edge protruding portion of the temporary reinforcing angle steel is connected with side edge end faces of the reinforced angle steel through a side fillet weld.
Further, in the step (5), the temporary reinforcing angle steel is separated from the reinforced angle steel by cutting or removing a side fillet weld when the temporary reinforcing angle steel is removed, and the side welding part of the reinforced angle steel is polished.
Further, the antirust coating in the step (6) is antirust paint.
Compared with the prior art, the invention has the following advantages:
the repairing method can be used for welding and repairing the interface corrosion of the tower foot and the concrete protective cap under the condition of ensuring the normal and safe operation of the power transmission tower, can be used for repairing and reinforcing the corrosion of the angle steel interface of the tower foot of the power transmission tower, and can also be used for avoiding dismantling and replacing an inclined material and a main material, namely, the invention can be used for safely and effectively repairing and reinforcing a second-level member and a third-level member.
Drawings
FIG. 1 is a first structural schematic diagram of the temporary reinforcing angle steel and a reinforced angle steel which are welded and fixed according to the invention;
FIG. 2 is a second structural schematic diagram of the temporary reinforcing angle steel and the reinforced angle steel which are welded and fixed according to the invention;
in the figure: 1-butt weld, 2-side fillet weld, 3-reinforced angle steel, 4-temporary reinforced angle steel and 5-side protrusion.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to fig. 1 to 2
A corrosion welding repair method for a steel angle interface of a power transmission tower is characterized by comprising the following steps:
(1) opening the concrete protective cap to expose a rusted area of the interface of the tower foot angle steel and the concrete protective cap;
(2) removing rust in a foot angle steel corrosion area of the power transmission tower; removing a coating and a rust layer at a position needing to be welded, and cutting a groove for thicker steel;
(3) the reinforced angle steel 3 in the tower foot angle steel is temporarily reinforced before welding: welding the temporary reinforcing angle steel 4 and the reinforced angle steel together by using the side fillet weld 2 at the opening side of the reinforced angle steel;
(4) welding and repairing a corrosion area of the reinforced angle steel: welding the rusted area by using the butt weld 1;
(5) after welding, removing the temporary reinforcing angle steel, and polishing a welding area to meet the requirement of I-level fatigue welding seams;
(6) and brushing an anticorrosive paint on the welding area for anticorrosive treatment, wherein the anticorrosive paint can be an antirust paint.
In this embodiment, in the step (3), the two side edges of the temporary reinforcing angle iron protrude out of the two side edges of the reinforced angle iron, and the upper surface of the side edge protruding portion 5 of the temporary reinforcing angle iron is connected to the side edge end surface of the reinforced angle iron through a side fillet weld. Thereby make by consolidating angle steel 3 and reinforce angle steel 4 temporarily and pass through side fillet weld 2 and connect, reinforce angle steel 4 temporarily and play the effect of transmission reinforced angle steel corrosion position both ends atress here, make the safety when welding corrosion position butt weld 1 obtain the guarantee.
In this embodiment, in the step (5), when the temporary reinforcing angle steel is removed, the temporary reinforcing angle steel is separated from the reinforced angle steel by means of cutting or removing a side fillet, and the side welding portion of the reinforced angle steel is polished.
The angle steel corrosion is repaired by using the butt weld 1 under the condition of ensuring normal operation of the power transmission tower and safe force transmission in a foot angle steel corrosion area of the tower; when the butt weld 1 of the reinforced angle steel 3 is welded, the temporary reinforcing angle steel 4 can be used as a welding backing plate, the butt weld 1 can be conveniently welded, after the welding is finished, the temporary reinforcing angle steel 4 is removed, and the welding area is polished, painted and subjected to corrosion prevention and other treatment, namely the welding repair of the interface corrosion area is realized under the condition that the appearance of the repaired angle steel is unchanged from the original angle steel.
Due to the fact that the atmospheric corrosion and the quality of the concrete protective cap are different, the safe operation of the power transmission tower is seriously influenced by the interface corrosion of the angle steel of the power transmission tower foot and the concrete protective cap. Therefore, the method can carry out welding repair on the interface corrosion of the tower foot and the concrete protective cap under the condition of ensuring the normal and safe operation of the power transmission tower.
The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various forms of the method for repairing corrosion welding of angle steel interface of power transmission tower may be designed without inventive labor based on the teachings of the present invention, and all equivalent changes, modifications, substitutions and alterations made without departing from the spirit and scope of the present invention as defined by the appended claims should be construed as encompassing the present invention.
Claims (5)
1. A corrosion welding repair method for a steel angle interface of a power transmission tower is characterized by comprising the following steps:
opening the concrete protective cap to expose a rusted area of the interface of the tower foot angle steel and the concrete protective cap;
removing rust in a foot angle steel corrosion area of the power transmission tower; removing the coating and rust layer at the position needing to be welded;
the reinforced angle steel in the tower foot angle steel is temporarily reinforced before being welded: welding the temporary reinforcing angle steel and the reinforced angle steel together by using a side surface fillet weld at the opening side of the reinforced angle steel;
welding and repairing a corrosion area of the reinforced angle steel: welding the rusted area by using a butt weld;
removing the temporary reinforcing angle steel, and polishing the welding area to meet the requirement of I-level fatigue welding seam;
and brushing an anticorrosive paint on the welding area for anticorrosive treatment.
2. The corrosion welding repair method for the angle steel interface of the power transmission tower according to claim 1, wherein in the step (2), a groove is required to be cut for thicker steel.
3. The corrosion welding repair method for the angle steel interface of the power transmission tower according to claim 1 or 2, wherein in the step (3), two side edges of the temporary reinforcing angle steel protrude out of two side edges of the reinforced angle steel, and an upper surface of the side protruding portion of the temporary reinforcing angle steel is connected with side end faces of the reinforced angle steel through a side fillet.
4. The corrosion welding repair method for the angle steel interface of the power transmission tower according to claim 1, wherein in the step (5), the temporary reinforcing angle steel is separated from the reinforced angle steel by cutting or removing a side fillet when the temporary reinforcing angle steel is removed, and the side welding portion of the reinforced angle steel is ground.
5. The corrosion welding repair method for the angle steel interface of the power transmission tower according to the claim 1, 2 or 4, wherein the antirust paint in the step (6) is antirust paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111251841.6A CN114054994A (en) | 2021-10-26 | 2021-10-26 | Corrosion welding repair method for angle steel interface of power transmission tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111251841.6A CN114054994A (en) | 2021-10-26 | 2021-10-26 | Corrosion welding repair method for angle steel interface of power transmission tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114054994A true CN114054994A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111251841.6A Pending CN114054994A (en) | 2021-10-26 | 2021-10-26 | Corrosion welding repair method for angle steel interface of power transmission tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114054994A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100875488B1 (en) * | 2007-07-13 | 2008-12-22 | 김범준 | Non-support form system and construction method using the same |
| CN201713195U (en) * | 2010-04-29 | 2011-01-19 | 江南嘉捷电梯股份有限公司 | Girder angle iron splicing structure on escalator or moving pavement |
| CN103883154A (en) * | 2014-03-14 | 2014-06-25 | 国家电网公司 | Method for field welding and strengthening of power transmission line steel angle tower leg |
| CN106378579A (en) * | 2016-11-30 | 2017-02-08 | 国网山东省电力公司电力科学研究院 | Reinforcement and strengthening method for corrosion damage of tower foot of power transmission angle-steel tower |
| CN212957924U (en) * | 2020-06-22 | 2021-04-13 | 国网江苏省电力有限公司南京供电分公司 | Door type guyed tower shank corrosion internal-pasting reinforcing device |
-
2021
- 2021-10-26 CN CN202111251841.6A patent/CN114054994A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100875488B1 (en) * | 2007-07-13 | 2008-12-22 | 김범준 | Non-support form system and construction method using the same |
| CN201713195U (en) * | 2010-04-29 | 2011-01-19 | 江南嘉捷电梯股份有限公司 | Girder angle iron splicing structure on escalator or moving pavement |
| CN103883154A (en) * | 2014-03-14 | 2014-06-25 | 国家电网公司 | Method for field welding and strengthening of power transmission line steel angle tower leg |
| CN106378579A (en) * | 2016-11-30 | 2017-02-08 | 国网山东省电力公司电力科学研究院 | Reinforcement and strengthening method for corrosion damage of tower foot of power transmission angle-steel tower |
| CN212957924U (en) * | 2020-06-22 | 2021-04-13 | 国网江苏省电力有限公司南京供电分公司 | Door type guyed tower shank corrosion internal-pasting reinforcing device |
Non-Patent Citations (1)
| Title |
|---|
| 谭青海等: "盐湖地区输电线路杆塔基础选型及其防腐研究", 《电网与清洁能源》 * |
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Application publication date: 20220218 |
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