CN103994302B - Base reinforcement of weld method mended by gas pipe line - Google Patents
Base reinforcement of weld method mended by gas pipe line Download PDFInfo
- Publication number
- CN103994302B CN103994302B CN201410236485.4A CN201410236485A CN103994302B CN 103994302 B CN103994302 B CN 103994302B CN 201410236485 A CN201410236485 A CN 201410236485A CN 103994302 B CN103994302 B CN 103994302B
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- Prior art keywords
- base
- weld
- weld seam
- benefit
- gas pipe
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Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000002787 reinforcement Effects 0.000 title claims abstract description 11
- 230000008901 benefit Effects 0.000 claims abstract description 40
- 238000003466 welding Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims description 10
- 238000013000 roll bending Methods 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 239000003034 coal gas Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 230000007096 poisonous effect Effects 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 34
- 230000004927 fusion Effects 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/1683—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of a patch which is fixed on the wall of the pipe by means of an adhesive, a weld or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to gas pipe line reinforcement of weld field, particularly base reinforcement of weld method mended by gas pipe line.Consuming time for stop system gas treatment pipe leakage, power consumption, complicated operation, threaten the problem of life safety and coal gas diffusion befouling environment, gas pipe line plugging test is for many years combined according to metal solder performance and plasticity, draw benefit base reinforcement technique, reach the interference of No leakage coal gas in welding among a small circle, avoid coal gas inflammable, explosive, poisonous problem, to the equipment that can weld, the weld seam weak link that pipeline occurs and the gas pipe line thinning area of causing of putting into operation for a long time reinforces, produce for corporate security and played effect, create huge economic benefit and environmental benefit.
Description
Technical field
The present invention relates to gas pipe line reinforcement of weld field, particularly base reinforcement of weld method mended by gas pipe line.
Background technique
Coal gas spot blast furnace, converter, coke oven distance coal-gas recovering ground, blast furnace gas excess pressure power generating machine and gas fired boiler have larger distance, and the both sides that gas pipeline is arranged in blast furnace region substantially, passage and major roads are visited by coke oven region, company.In long-time running, gas pipe line is because of the wearing and tearing of weld defect, dust-laden coal gas, and since particularly three, five blast furnace dry method dusts put into operation, gas leakage phenomenon appears in pipeline acid etching.This not only threatens the personal safety of pedestrians, pollutes surrounding environment, affects gas to generate electricity amount, especially in the winter time, also may affect surrounding area resident heating.
Summary of the invention
The technical problem that the present invention solves is: the problem of, power consumption consuming time for stop system gas treatment pipe leakage, complicated operation, threat life safety and coal gas diffusion befouling environment, the weld seam weak link that the equipment that can weld, pipeline occur and the gas pipe line large size thinning area of causing of putting into operation for a long time is reinforced, prevents pipe leakage.
The technical solution adopted in the present invention is: base reinforcement of weld method mended by gas pipe line, carries out according to following step:
Step one, carries out ultrasound examination to gas pipe line and finds weld seam weak part and gas pipe pipe thickness thinning area;
Step 2, butt welded seam weak part carries out repair welding: adopt material, the thickness sheet material roughly the same with weld seam pipeline is as benefit base, the weld seam welded is welded with one piece and mends base, mend base and roll into the roll bending conformed to leakage gas Pipeline Curvature, when welded pipe line mends base, should first weld one side parallel with weld seam, beat gently with hand hammer while hot after being soldered, make to have welded between benefit base and pipeline while occur that local is close, again the adjacent both sides that benefit base has welded are welded respectively near the part of tube wall, and then beat with hand hammer, make benefit base near pipeline, near one section, weld one section, repeatedly carry out, until when being soldered to the opposite side of weld seam, with electric arc to the preheating of benefit blanket, and knock benefit base with hand hammer along the direction that weld seam both sides are parallel with weld seam while hot, benefit base is arched upward on pipe welding seam, and the benefit base of weld seam both sides and pipeline are close to, again weld seam is crossed in two side welds of mending base, and take advantage of weld seam red heat hand hammer beat gently weld seam and mend base, the benefit base do not welded is made to be close to pipeline, continue welding again, weld until mend base both sides, the another side that finally welding is parallel with weld seam, and ensure fillet weld full weld,
Step 3, repair welding is carried out to gas pipe pipe thickness thinning area: the sheet material adopting material, thickness roughly the same with gas pipe pipe thickness thinning area is as benefit base, gas pipe pipe thickness thinning area is welded with one piece and mends base, mend base and roll into the roll bending conformed to gas pipe pipe thickness thinning area curvature, then repair welding is in the outside of thinning pipeline.
The invention has the beneficial effects as follows: gas pipe line adopts mends base reinforcement technique, avoid blast furnace fault damping down repeatedly, reduce main production unit fault to stop transport repeatedly, minimizing supplement production factory and our factory's gas fittings fault are stopped transport more than ten times, put forward product wound effect for corporate security production and played great role, create larger economic benefit, environmental benefit, social benefit.
Accompanying drawing explanation
Fig. 1 is reverse segmentation leak stopping and twists with the fingers the weld seam of pressing and adding welding and being formed;
The weld seam formed when Fig. 2 is normal weld;
Fig. 3 is that butt welded seam weak part of the present invention carries out repair welding schematic diagram;
Fig. 4 is that the present invention carries out plan view and the left view of repair welding to gas pipe pipe thickness thinning area.
Embodiment
Ultrasound examination is carried out to gas pipe line and finds weld seam weak part and gas pipe pipe thickness thinning area, butt welded seam weak part carries out repair welding, reverse segmentation leak stopping and sth. made by twisting pressure add the crackle of welding process to gas pipe line good leak stopping effect, but both welding time molten bath is very shallow can not can by crackle through welding as normal weld, the welding bead that they are formed, its fusion penetration is more much smaller than the fusion penetration formed during normal weld, as shown in Figure 1, for reverse segmentation leak stopping and sth. made by twisting press the weld seam adding welding and formed, the weld seam of Fig. 2 for being formed during normal weld, as can be seen from the figure, much more shallow than the fusion penetration formed during normal weld of the fusion penetration of the weld seam that Fig. 1 is formed, therefore, the former weld strength is also poor many compared with the latter.The weld seam that this leak stopping is formed in gas pipe line actual moving process, easily because gas pressure larger fluctuation reappears crackle.Therefore the weld seam formed for leak stopping should take reinforcement measure effectively.As shown in Figure 3, the sheet material adopting material, thickness roughly the same with leakage pipe is as benefit base, and the weld seam welded is welded with one piece and mends base, the size of mending base is determined according to actual conditions, mends the fillet weld pressure full weld of base surrounding.
Mend base to extract on standard tubing, also can make of steel plate.With steel plate make mend base time, should roll according to required benefit base size dimension the roll bending conformed to leakage gas Pipeline Curvature.
When welded pipe line mends base, should first weld one side parallel with weld seam, beat gently with hand hammer while hot after being soldered, make to have welded between benefit base and pipeline while occur that local is close, again the adjacent both sides that benefit base has welded are welded respectively near the part of tube wall, and then beat with hand hammer, make benefit base near pipeline, near one section, weld one section, repeatedly carry out, until when being soldered to the opposite side of leak stopping weld seam, with electric arc to benefit blanket waste heat, and knock benefit base with hand hammer along the direction that weld seam both sides are parallel with leak stopping weld seam while hot, time mend base arch upward on pipe plugging weld seam, and the benefit base of leak stopping weld seam both sides and pipeline are close to, again leak stopping weld seam is crossed in two side welds of mending base, and take advantage of weld seam red heat hand hammer beat gently weld seam and mend base, the benefit base do not welded is made to be close to pipeline, continue welding again, weld until mend base both sides, the another side that finally welding is parallel with leak stopping weld seam, and ensure fillet weld full weld.
When base is mended in welding, just welding edge has beaten two objects: make benefit base be close to gas pipe line; Knock weld seam and can reduce welding stress, prevent weld cracking.When blast furnace stop system overhauls, the weld seam of this kind of leak stopping and benefit base should be sliced off, pipeline is thoroughly repaired.
Before implementing leak stopping, safety climbing ladder must be set up in leak stopping scene, and 2 people must be had to guard.
Repair welding is carried out to gas pipe pipe thickness thinning area:
Limited company's gas pipe line enormous amount do not revised by Shanxi Taiyuan Iron and Steel Co., section of tubing tube wall is due to the generation worn down that puts into operation for a long time, especially since blast furnace dry method dust puts into operation, the thinning speed of pipe thickness is sharply accelerated in acid etching, causes and there occurs repeatedly pipe leakage accident.Needing regularly to carry out ultrasonic measurement to Gas Pipe Wall Thickness, carrying out preventative repair welding to there is the pipeline exceeding safety margin.As shown in Figure 4, make when mending base, according to thinning line size specification, prepare the roll bending that conforms to leakage pipe curvature several pieces, then repair welding is in the outside of thinning pipeline.Carry out repair welding to gas pipe line tube wall large size thinner position, actual being equivalent to, adds pipeline wall thickness, enhances pipeline strength, can prevent pipeline large size thinning area that leakage accident occurs.
To the thinning problem of pipeline wall thickness large size, cannot stop at blast furnace system, damping down, if occur this kind of leakage use injecting Live leaking-stopping technology time, leakage pipe extrusion-deformation is probably even increased the weight of gas leakage by fixture; Adopt adhesive technology with pressure to be also difficult to solve to this kind of problem, and use this method to solve cleverly.
Before implementing leak stopping, safety climbing ladder must be set up in leak stopping scene.Leak stopping can be carried out: scene must have 2 people to guard when possessing following condition; Welding personnel must wear respirator; Protection station professional workforce must await orders at the scene; Fire-fighting truck scene coordinates.
Claims (1)
1. base reinforcement of weld method mended by gas pipe line, it is characterized in that carrying out according to following step:
Step one, carries out ultrasound examination to gas pipe line and finds weld seam weak part and gas pipe pipe thickness thinning area;
Step 2, butt welded seam weak part carries out repair welding: adopt material, all roughly the same with the weld seam pipeline sheet material of thickness is as benefit base, the weld seam welded is welded with one piece and mends base, mend base and roll into the roll bending conformed to leakage gas Pipeline Curvature, when welded pipe line mends base, should first weld one side parallel with weld seam, beat gently with hand hammer while hot after being soldered, make to have welded between benefit base and pipeline while occur that local is close, again the adjacent both sides that benefit base has welded are welded respectively near the part of tube wall, and then beat with hand hammer, make benefit base near pipeline, near one section, weld one section, repeatedly carry out, until when being soldered to the opposite side of weld seam, with electric arc to the preheating of benefit blanket, and knock benefit base with hand hammer along the direction that weld seam both sides are parallel with weld seam while hot, benefit base is arched upward on pipe welding seam, and the benefit base of weld seam both sides and pipeline are close to, again weld seam is crossed in two side welds of mending base, and take advantage of weld seam red heat hand hammer beat gently weld seam and mend base, the benefit base do not welded is made to be close to pipeline, continue welding again, weld until mend base both sides, the another side that finally welding is parallel with weld seam, and ensure fillet weld full weld,
Step 3, repair welding is carried out to gas pipe pipe thickness thinning area: the sheet material adopting material, thickness all roughly the same with gas pipe pipe thickness thinning area is as benefit base, gas pipe pipe thickness thinning area is welded with one piece and mends base, mend base and roll into the roll bending conformed to gas pipe pipe thickness thinning area curvature, then repair welding is in the outside of thinning pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410236485.4A CN103994302B (en) | 2014-05-30 | 2014-05-30 | Base reinforcement of weld method mended by gas pipe line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410236485.4A CN103994302B (en) | 2014-05-30 | 2014-05-30 | Base reinforcement of weld method mended by gas pipe line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103994302A CN103994302A (en) | 2014-08-20 |
| CN103994302B true CN103994302B (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410236485.4A Active CN103994302B (en) | 2014-05-30 | 2014-05-30 | Base reinforcement of weld method mended by gas pipe line |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607864A (en) * | 2015-02-02 | 2015-05-13 | 山西太钢不锈钢股份有限公司 | Gas pipeline online plugging method |
| CN107717251A (en) * | 2017-10-19 | 2018-02-23 | 芜湖新兴铸管有限责任公司 | The online soldering engineering method of coke oven gas pipe weld leakage |
| CN108843889B (en) * | 2018-06-29 | 2020-06-09 | 浙江海洋大学 | Repair method of marine gas transmission metal pipeline |
| CN111618461A (en) * | 2020-06-03 | 2020-09-04 | 唐山市开平区泽成冶金机械有限公司 | Targeted welding method for iron-smelting blast furnace equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099110A (en) * | 1994-05-27 | 1995-02-22 | 胜利石油管理局油建二公司 | Sleeve-bonding jointing method for weld of lining pipe |
| CN1120143A (en) * | 1992-09-09 | 1996-04-10 | 钟表弹簧公司 | Method for repairing a pipe |
| GB2343728A (en) * | 1998-11-12 | 2000-05-17 | Michael Keith Bailey | Repairing polyethylene pipes |
| CN101694261A (en) * | 2009-10-19 | 2010-04-14 | 河北华油一机图博涂层有限公司 | Internal repaired mouth construction process of internal coating pipeline |
| CN101968143A (en) * | 2010-09-16 | 2011-02-09 | 沈阳化工大学 | Method for performing corrosion resistant joint coating to pipeline joint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2393229B (en) * | 2002-09-17 | 2004-11-24 | Petronas Res & Scient Services | Method and means of repairing a pipe |
-
2014
- 2014-05-30 CN CN201410236485.4A patent/CN103994302B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120143A (en) * | 1992-09-09 | 1996-04-10 | 钟表弹簧公司 | Method for repairing a pipe |
| CN1099110A (en) * | 1994-05-27 | 1995-02-22 | 胜利石油管理局油建二公司 | Sleeve-bonding jointing method for weld of lining pipe |
| GB2343728A (en) * | 1998-11-12 | 2000-05-17 | Michael Keith Bailey | Repairing polyethylene pipes |
| CN101694261A (en) * | 2009-10-19 | 2010-04-14 | 河北华油一机图博涂层有限公司 | Internal repaired mouth construction process of internal coating pipeline |
| CN101968143A (en) * | 2010-09-16 | 2011-02-09 | 沈阳化工大学 | Method for performing corrosion resistant joint coating to pipeline joint |
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| Publication number | Publication date |
|---|---|
| CN103994302A (en) | 2014-08-20 |
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