CN109396743A - A kind of field repairing method suitable for UHV transmission line steel pipe tower crack - Google Patents
A kind of field repairing method suitable for UHV transmission line steel pipe tower crack Download PDFInfo
- Publication number
- CN109396743A CN109396743A CN201811240514.9A CN201811240514A CN109396743A CN 109396743 A CN109396743 A CN 109396743A CN 201811240514 A CN201811240514 A CN 201811240514A CN 109396743 A CN109396743 A CN 109396743A
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- China
- Prior art keywords
- stopper
- welding
- consent
- transmission line
- steel pipe
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention relates to a kind of field repairing methods suitable for UHV transmission line steel pipe tower crack, comprising the following steps: (1) drills out consent from the initial position in UHV transmission line steel pipe tower crack；It (2) is the stopper of suitable dimension by bit change-over after the completion of drilling, adjustment welding parameter starts welding process；(3) stopper high speed rotation and along consent axial feed a, until consent is filled；(4) after cooling down, surface is polished finishing, the reparation at single consent is completed；(5) move towards to carry out stitch welding reparation until completion is repaired after rift defect completely eliminates along crack.In the present invention, the revolving speed of stopper, welding pressure, top pressure and top time is optimized in when welding, keeps site operation very quick, substantially in the range of 10~20 minutes, maintenance efficiency is improved, and ensure that equipment can come into operation as soon as possible, avoids the generation of accident.
Description
Technical field
The invention belongs to Welding Repair Technology fields, are suitable for UHV transmission line steel pipe tower more particularly, to one kind
The field repairing method in crack.
Background technique
UHV transmission line refers to ± 800 kilovolts or more of direct current and the voltage of 1000 kilovolts and the above alternating current
Grade conveys electric energy.UHV transmission is developed on the basis of EHV transmission, and purpose is still to continue with raising transmission of electricity energy
Power is realized in powerful, long distance power transmission, and realizes remote Power System Interconnection, and pool is built up.For
The needs of the power grid construction of Chinese society economic development are adapted to, application of the extra-high voltage iron tower in national backbone transmission line of electricity is more next
Wider, structure is complicated for extra-high voltage iron tower, and difficulty of processing is big, and largely uses Q420 high-strength steel.However Q420 low-alloy high-strength
Steel causes its weldability poor since steel chemical component limits, and is easy cracked during one's term of military service in steel tower.In the recent period extra-high
Pressure transmission line is stepped in tower inspection, it was found that the stiffening plate butt weld craze and transfiguration and stiffening plate and main material welded in main material
The fillet weld of steel-pipe welding cracks and stiffening plate butt weld cracking, splits if carrying out crack forming mechanism fastly not to the utmost and may result in
Line Quick Extended.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide be applicable in carry out UHV transmission line steel on site
The reparation in pipe steel tower crack, the one kind that can be quickly repaired at the scene are suitable for UHV transmission line steel pipe tower crack
Field repairing method.
Specific technical solution of the present invention is as follows:
A kind of field repairing method suitable for UHV transmission line steel pipe tower crack, it is characterised in that: including with
Lower step:
(1) consent is drilled out from the initial position in UHV transmission line steel pipe tower crack；
It (2) is the stopper of suitable dimension by bit change-over after the completion of drilling, adjustment welding parameter starts welding process；
(3) stopper high speed rotation and along consent axial feed a, until consent is filled；
(4) after cooling down, surface is polished finishing, the reparation at single consent is completed；
(5) move towards to carry out stitch welding reparation until completion is repaired after rift defect completely eliminates along crack.
Further more, (2) the stopper is cylindrical or cone to step.
Further more, step is (2) described to be welded as the welding of upset formula.
Further more, step (2) the welding parameter include: stopper revolving speed be 7000r/min, welding pressure 35kN, upset
Pressure is 40kN, and stopper consumption is 500kg, upset time 8000ms.
The advantages of the present invention are:
In the present invention, consent is drilled out in crack initial position, then revolves stopper high speed using the method for upset formula welding
Turn and along the axial feed of consent, due to the continuous ductile bed that fricting shearing generates, and sedimentary filling consent and stopper it
Between gap and realize connection, after single consent reparation along crack move towards carry out stitch welding reparation until rift defect disappear completely
It removes.The revolving speed of stopper, welding pressure, top pressure and top time are optimized when welding, make site operation very
Quickly, maintenance efficiency substantially is improved in the range of 10~20 minutes, and ensure that equipment can come into operation as soon as possible,
Avoid the generation of accident.
Specific embodiment
The present invention is described in further detail by following embodiment, but the technology contents that are described of the present embodiment be it is illustrative,
Without being restrictive, protection scope of the present invention should not be limited to according to this.
A kind of field repairing method suitable for UHV transmission line steel pipe tower crack, innovation of the invention are:
The following steps are included:
(1) consent is drilled out from the initial position in UHV transmission line steel pipe tower crack；
It (2) is the stopper of suitable dimension by bit change-over after the completion of drilling, adjustment welding parameter starts welding process；
(3) stopper high speed rotation and along consent axial feed a, until consent is filled；
(4) after cooling down, surface is polished finishing, the reparation at single consent is completed；
(5) move towards to carry out stitch welding reparation until completion is repaired after rift defect completely eliminates along crack.
Wherein, (2) the stopper is cylindrical or cone to step.Step is (2) described to be welded as the welding of upset formula.Step
The rapid (2) described welding parameter includes: that the revolving speed of stopper is 7000r/min, welding pressure 35kN, upsetting force 40kN, stopper
Consumption is 500kg, upset time 8000ms.
Under the action of certain axial load, consumption type metal stopper and preboring consent keep concentric high speed rotation and downward
It is mobile, when rotating stopper and consent bottom contacts (stopper diameter < consent diameter), fricting shearing takes place and generates continuous
Ductile bed, the expendable stopper on frictional interface is in hot plastic state, and the generation rate of ductile bed is higher than stopper
Feed rate, it means that rubbing surface will rise along stopper and form dynamic recrystallization sedimentary.Ductile bed is due to by Hydrostatic
Pressure effect and around the inner wall of consent, so the diameter of sedimentary is typically larger than the diameter of expendable stopper, so as to filler plug
Connection is simultaneously realized in hole and the gap of stopper.After the completion of welding process, surface polishing finishing repair process is terminated.
In the present invention, consent is drilled out in crack initial position, then revolves stopper high speed using the method for upset formula welding
Turn and along the axial feed of consent, due to the continuous ductile bed that fricting shearing generates, and sedimentary filling consent and stopper it
Between gap and realize connection, after single consent reparation along crack move towards carry out stitch welding reparation until rift defect disappear completely
It removes.The revolving speed of stopper, welding pressure, top pressure and top time are optimized when welding, make site operation very
Quickly, maintenance efficiency substantially is improved in the range of 10~20 minutes, and ensure that equipment can come into operation as soon as possible,
Avoid the generation of accident.
Claims (4)
1. a kind of field repairing method suitable for UHV transmission line steel pipe tower crack, it is characterised in that: including following
Step:
(1) consent is drilled out from the initial position in UHV transmission line steel pipe tower crack；
It (2) is the stopper of suitable dimension by bit change-over after the completion of drilling, adjustment welding parameter starts welding process；
(3) stopper high speed rotation and along consent axial feed a, until consent is filled；
(4) after cooling down, surface is polished finishing, the reparation at single consent is completed；
(5) move towards to carry out stitch welding reparation until completion is repaired after rift defect completely eliminates along crack.
2. a kind of field repairing method suitable for UHV transmission line steel pipe tower crack according to claim 1,
It is characterized by: (2) the stopper is cylindrical or cone to step.
3. a kind of field repairing method suitable for UHV transmission line steel pipe tower crack according to claim 1,
It is characterized by: step is (2) described to be welded as the welding of upset formula.
4. a kind of field repairing method suitable for UHV transmission line steel pipe tower crack according to claim 1,
It is characterized by: step (2) the welding parameter include: stopper revolving speed be 7000r/min, welding pressure 35kN, upset pressure
Power is 40kN, and stopper consumption is 500kg, upset time 8000ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240514.9A CN109396743A (en) | 2018-10-24 | 2018-10-24 | A kind of field repairing method suitable for UHV transmission line steel pipe tower crack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240514.9A CN109396743A (en) | 2018-10-24 | 2018-10-24 | A kind of field repairing method suitable for UHV transmission line steel pipe tower crack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109396743A true CN109396743A (en) | 2019-03-01 |
Family
ID=65469433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811240514.9A Pending CN109396743A (en) | 2018-10-24 | 2018-10-24 | A kind of field repairing method suitable for UHV transmission line steel pipe tower crack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109396743A (en) |
Citations (11)
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|---|---|---|---|---|
| CN101171095A (en) * | 2005-05-03 | 2008-04-30 | 福士科国际公司 | Tundish stopper rod for continuous molten metal casting |
| CN201055938Y (en) * | 2007-02-16 | 2008-05-07 | 北京石油化工学院 | Underwater steel construction crackle friction stitch welding renovation equipment |
| CN102049606A (en) * | 2009-10-30 | 2011-05-11 | 北京石油化工学院 | Local draining and friction stitch welding repairing equipment with underground steel structure and method |
| CN107182223B (en) * | 2006-12-29 | 2012-04-18 | 首都航天机械公司 | Friction plug riveting process |
| CN104439685A (en) * | 2014-10-27 | 2015-03-25 | 中国海洋石油总公司 | Continuous machining method for friction plunger in underwater welding process |
| CN204621352U (en) * | 2015-05-15 | 2015-09-09 | 中国海洋石油总公司 | Friction stitch welding stopper structure |
| CN204771123U (en) * | 2015-03-24 | 2015-11-18 | 中国海洋石油总公司 | Friction stitch welding is with stopper stick |
| CN205309017U (en) * | 2016-01-21 | 2016-06-15 | 方圆电气股份有限公司 | Special high voltage steel tube pipe fitting prosthetic devices for tower |
| US20160250727A1 (en) * | 2015-02-26 | 2016-09-01 | Airbus Group Sas | Friction stir welding: method and device for filling a hole at the end of welding or for repairing a welding defect |
| CN105921879A (en) * | 2016-06-16 | 2016-09-07 | 天津大学 | Pipeline through defect underwater welding repairing method and structure based on friction stitch welding |
| CN106181021A (en) * | 2016-08-29 | 2016-12-07 | 天津大学 | A kind of electric current auxiliary friction post/tapered plug welding method and frock thereof |
-
2018
- 2018-10-24 CN CN201811240514.9A patent/CN109396743A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171095A (en) * | 2005-05-03 | 2008-04-30 | 福士科国际公司 | Tundish stopper rod for continuous molten metal casting |
| CN107182223B (en) * | 2006-12-29 | 2012-04-18 | 首都航天机械公司 | Friction plug riveting process |
| CN201055938Y (en) * | 2007-02-16 | 2008-05-07 | 北京石油化工学院 | Underwater steel construction crackle friction stitch welding renovation equipment |
| CN102049606A (en) * | 2009-10-30 | 2011-05-11 | 北京石油化工学院 | Local draining and friction stitch welding repairing equipment with underground steel structure and method |
| CN104439685A (en) * | 2014-10-27 | 2015-03-25 | 中国海洋石油总公司 | Continuous machining method for friction plunger in underwater welding process |
| US20160250727A1 (en) * | 2015-02-26 | 2016-09-01 | Airbus Group Sas | Friction stir welding: method and device for filling a hole at the end of welding or for repairing a welding defect |
| CN204771123U (en) * | 2015-03-24 | 2015-11-18 | 中国海洋石油总公司 | Friction stitch welding is with stopper stick |
| CN204621352U (en) * | 2015-05-15 | 2015-09-09 | 中国海洋石油总公司 | Friction stitch welding stopper structure |
| CN205309017U (en) * | 2016-01-21 | 2016-06-15 | 方圆电气股份有限公司 | Special high voltage steel tube pipe fitting prosthetic devices for tower |
| CN105921879A (en) * | 2016-06-16 | 2016-09-07 | 天津大学 | Pipeline through defect underwater welding repairing method and structure based on friction stitch welding |
| CN106181021A (en) * | 2016-08-29 | 2016-12-07 | 天津大学 | A kind of electric current auxiliary friction post/tapered plug welding method and frock thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190301 |
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| RJ01 | Rejection of invention patent application after publication |