CN102398121B - Grouting hole plugging welding method for pressure steel pipe of hydropower station - Google Patents
Grouting hole plugging welding method for pressure steel pipe of hydropower station Download PDFInfo
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- CN102398121B CN102398121B CN 201110210297 CN201110210297A CN102398121B CN 102398121 B CN102398121 B CN 102398121B CN 201110210297 CN201110210297 CN 201110210297 CN 201110210297 A CN201110210297 A CN 201110210297A CN 102398121 B CN102398121 B CN 102398121B
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- welding
- packer
- weldering
- steel pipe
- grout hole
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- 238000003466 welding Methods 0.000 title claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000011440 grout Substances 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 14
- 230000011218 segmentation Effects 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 4
- 239000003818 cinder Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a grouting hole plugging welding method for a pressure steel pipe of a hydropower station. Welding work is completed by performing accumulated water clearing operation, preheating, positioned welding, plugging welding and an emergency after heating heat-preserving process. The method has the advantages of simple and practical process, reliable quality, readily-available welding materials, saving in work hour and cost, good plugging welding quality, and the like, and is particularly suitable for occasions with rich underground water.
Description
Technical field
What the present invention relates to isWelding technique is used in particular for the plugging welding method of pressure steel pipe of hydropower station grout hole.
The prior art situation
pressure steel pipe of hydropower station is the large-scale pipeline of transporting power station water, the employing plurality of sections of steel pipes is welded, be embedded in subterranean tunnel, must be between its outer wall and hole wall after penstock installation fill concrete, for eliminating concrete and steel pipe, gap between the wall of hole, offer some grout holes on the penstock wall, grout hole is by the perforate on steel pipe walls, to the stiffener that should the hole welds on outer wall of steel pipe, offering screw and plug screw on stiffener consists of, after grouting is completed, plug screw is arranged on grout hole, grout hole is welded shutoff, being about to plug screw and steel pipe shutoff welds together.But in the situation that the phenomenon that seeps water often appears in rich groundwater before grouting hole plugging welds, the very difficult quality that guarantees the complete shutoff of water and guarantee to weld of common welding method.So have, shutoff welding was divided into for two steps, completes grout hole plug screw shutoff postwelding, then add the weldering accessory plate and carry out soldering and sealing, construction is bothered.
Summary of the invention
The objective of the invention is the deficiency for above-mentioned pressure steel pipe of hydropower station grouting hole plugging welding unfavorable factor and existing shutoff solder technology, provide a kind of welding quality good grouting hole plugging welding method for pressure steel pipe of hydropower station.
The penstock material is that Q345D, thickness are 34 ㎜, 44 ㎜ and 54 ㎜; The packer material is Q345D.
The stifled weldering of top seal new technology is as follows:
Welding material: with TS202, φ 3.2 ㎜ waterproof welding rod backing weldings, water shutoff.Remainder layer adopts J507RH, φ 2.5 or φ 3.2 ㎜ ㎜ welding rods.
(1) welding is prepared
After requiring routinely to assemble packer, if grout hole is positioned at bottom steel pipe, removes the ponding operation and carry throughout, to reduce the cooling effect of water.
(2) preheating
Packer and the scope in grout hole edge 50-70mm are carried out the preheating insulation heating, the preheating insulation temperature is 60 ℃ ~ 80 ℃, get temperature upper limit when the steel pipe thickness of slab is thicker, with the frequently mobile heating of fuel gas welding torch flame, make every effort to homogeneous heating, the preheating insulation heating keeps in full welding process, detects with some temperature meter;
(3) tack welding
Position weldering with the TS202 welding rod at packer with apart from little position, grout hole gap, to prevent welding deformation;
(4) shutoff welding
First use TS202, φ 3.2 ㎜ waterproof welding rods, adopt the pull-alongs arc manipulation, connect arc-welding, draw circle and receive arc, bevel for welding between packer and grout hole is carried out backing welding, and layer thickness is 2.5 ㎜ ~ 3 ㎜, thickness 2.5 ㎜ ~ 3 ㎜ can be best reach drawing effect to sublevel, can farthest drive hydrogen and improve tissue, if layer cross thin be unable to undergo shrinkage stress and when the weldering sublevel easily by burn-through;
After the scarfing cinder of backing welding layer, with J507RH, φ 2.5 ㎜ or φ 3.2 ㎜ welding rods, weld 2 ~ 3 layers, each layer thickness 2.5 ~ 3 ㎜. layer thickness 2.5 ~ 3 ㎜. be the optimum value of driving hydrogen and improving tissue, also avoided simultaneously producing the disadvantage of penetrability shortcoming, for make the fusion of weld seam both sides good, avoid undercut and reduce cross-direction shrinkage stress, the capping layer divides the twice weldering;
Not segmentation weldering is adopted in backing welding and second layer weldering, the segmentation weldering is adopted in all the other upper strata welderings, first weld 2/3 of circumferential length, weld again remaining 1/3, prevent prime coat because of the cooling contraction that causes that is subjected to water, avoided, received the shortcoming that arc causes, the prime coat that plasticity is poor is torn to prevent shrinkage stress, and all play, receive the arc place all needs polishing;
(5) urgent after heat insulation
More than with gas flame, packer and the scope in the grout hole edge 50-70mm being carried out Heat preservation 3min immediately after welding finishes.
(6) reconditioning:
Rotation installing handle on packer is cut off, carry out reconditioning together with weld seam, the stifled weldering of top seal finishes.
The present inventionThe advantages such as pressure steel pipe of hydropower station grout hole top seal blocking welding method has that simple for process, reliable in quality, wlding are easy to get, the saving working hour, reduces expenses, and the shutoff welding quality is good, the occasion that is particularly suitable for rich groundwater is used.
Description of drawings
Accompanying drawing 1 is pressure steel pipe of hydropower station grouting hole structure shape schematic diagram of the present invention.1-webmaster wherein, 2-stiffener, 3-packer, 4-screwed hole, 5-grouting hole plugging weld bond.
The specific embodiment
(1) welding is prepared
After requiring routinely to assemble packer, if grout hole is positioned at bottom steel pipe, removes the ponding operation and carry throughout;
(2) preheating
Packer and the scope in grout hole edge 50-70mm are carried out the preheating insulation heating, the preheating insulation temperature is 60 ℃ ~ 80 ℃, (gas welding torch flame leaves the numerical value after 20 seconds) when the steel pipe thickness of slab is thicker the preheating insulation heating-up temperature get higher ceiling temperature value, with the frequently mobile heating of combustion gas (oxy-acetylene) welding gun flame, make every effort to homogeneous heating, the preheating insulation heating keeps in full welding process, detects with some temperature meter;
(3) tack welding
Position weldering with the TS202 welding rod at packer with apart from little position, grout hole gap, to prevent welding deformation;
(4) shutoff welding
With TS202, φ 3.2 ㎜ waterproof welding rods, adopt the pull-alongs arc manipulation, connect arc-welding, draw circle and receive arc, the bevel for welding between packer and grout hole is carried out backing welding, layer thickness is 2.5 ㎜ ~ 3 ㎜;
After the scarfing cinder of backing welding layer, with J507RH, φ 2.5 ㎜ or φ 3.2 ㎜ welding rods, weld 2 ~ 3 layers, each layer thickness 2.5 ~ 3 ㎜, capping layer divide the twice weldering;
Not segmentation weldering is adopted in the weldering of backing welding and the second layer, and segmentations weldering is adopted in all the other upper stratas welderings, first welds 2/3 of circumferential length, then weld remaining 1/3, all play, receive the arc place all needs polishing;
(5) urgent after heat insulation
More than with gas flame, packer and the scope in the grout hole edge 50-70mm being carried out Heat preservation 3min immediately after welding finishes;
(6) reconditioning:
Rotation installing handle on packer is cut off, carry out reconditioning together with weld seam, the stifled weldering of top seal finishes.
For estimating shutoff Welding effect, to work out the soldering test program and simulate top water soldering test, result of the test shows, satisfies DL/T 5017-2007 code requirement fully.Test report is as follows:
The check result summary sheet
Test plate (panel) assembling and joint visual examination record sheet
The welding condition record sheet
Claims (1)
1. grouting hole plugging welding method for pressure steel pipe of hydropower station is characterized in that:
(1) welding is prepared:
After requiring routinely to assemble packer, if grout hole is positioned at bottom steel pipe, removes the ponding operation and carry throughout;
(2) preheating:
Packer and the scope in grout hole edge 50-70mm are carried out the preheating insulation heating, the preheating insulation temperature is 60 ℃ ~ 80 ℃, when the steel pipe thickness of slab is thicker, the preheating insulation heating-up temperature is got higher ceiling temperature value, with the frequently mobile heating of fuel gas welding torch flame, make every effort to homogeneous heating, the preheating insulation heating keeps in full welding process, and Wen Jiyi detects with point;
(3) tack welding:
Position weldering with the TS202 welding rod at packer with apart from little position, grout hole gap, to prevent welding deformation;
(4) shutoff welding:
With TS202, φ 3.2 ㎜ waterproof welding rods, adopt the pull-alongs arc manipulation, connect arc-welding, draw circle and receive arc, the bevel for welding between packer and grout hole is carried out backing welding, layer thickness is 2.5 ㎜ ~ 3 ㎜;
After the scarfing cinder of backing welding layer, with J507RH, φ 2.5 ㎜ or φ 3.2 ㎜ welding rods, weld 2 ~ 3 layers, each layer thickness 2.5 ~ 3 ㎜, capping layer divide the twice weldering;
Not segmentation weldering is adopted in the weldering of backing welding and the second layer, and segmentations weldering is adopted in all the other upper stratas welderings, first welds 2/3 of circumferential length, then weld remaining 1/3, all play, receive the arc place all needs polishing;
(5) urgent after heat insulation:
More than with gas flame, packer and the scope in the grout hole edge 50-70mm being carried out Heat preservation 3min immediately after welding finishes;
(6) reconditioning:
Rotation installing handle on packer is cut off, carry out reconditioning together with weld seam, the stifled weldering of top seal finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110210297 CN102398121B (en) | 2011-07-26 | 2011-07-26 | Grouting hole plugging welding method for pressure steel pipe of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110210297 CN102398121B (en) | 2011-07-26 | 2011-07-26 | Grouting hole plugging welding method for pressure steel pipe of hydropower station |
Publications (2)
| Publication Number | Publication Date |
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| CN102398121A CN102398121A (en) | 2012-04-04 |
| CN102398121B true CN102398121B (en) | 2013-05-08 |
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| CN 201110210297 Active CN102398121B (en) | 2011-07-26 | 2011-07-26 | Grouting hole plugging welding method for pressure steel pipe of hydropower station |
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| CN104372775A (en) * | 2014-12-05 | 2015-02-25 | 国家电网公司 | Pumped storage power station pressure steel tube slurry injection hole seal welding method and seal welding structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862883A (en) * | 2010-02-04 | 2010-10-20 | 哈尔滨工业大学 | Fuel gas pipeline leakage pressurized blocking welding method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58192691A (en) * | 1982-05-07 | 1983-11-10 | Hitachi Ltd | Welding method of piping |
| JPS59225899A (en) * | 1983-06-07 | 1984-12-18 | Nippon Steel Corp | Welding method of tab plate in production of uo steel pipe |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862883A (en) * | 2010-02-04 | 2010-10-20 | 哈尔滨工业大学 | Fuel gas pipeline leakage pressurized blocking welding method |
Non-Patent Citations (4)
| Title |
|---|
| 丁易等.小浪底水电站压力钢管灌浆孔封堵方法研究.《人民黄河》.1998,第20卷(第10期), |
| 天生桥一级水电站压力钢管的制造、运输与安装;徐绍波;《四川水力发电》;20020330;第21卷(第01期);第27-32页 * |
| 小浪底水电站压力钢管灌浆孔封堵方法研究;丁易等;《人民黄河》;19981020;第20卷(第10期);第34-35页 * |
| 徐绍波.天生桥一级水电站压力钢管的制造、运输与安装.《四川水力发电》.2002,第21卷(第01期), |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: LIAONING PUSHIHE WATER-STORAGE CO., LTD. Effective date: 20131211 Owner name: STATE GRID XINYUAN CO., LTD. LIAONING PUSHIHE WATE Effective date: 20131211 |
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Free format text: CORRECT: ADDRESS; FROM: 118216 DANDONG, LIAONING PROVINCE TO: 100031 XICHENG, BEIJING |
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Effective date of registration: 20131211 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: State Grid Xinyuan Co., Ltd. Patentee after: Liaoning Pushihe Water-Storage Co., Ltd. Address before: 118216 Liaoning province Dandong City Zhen'an District Taiping Bay, Liaoning Pushihe Pumped Storage Power Co. Ltd. Patentee before: Liaoning Pushihe Water-Storage Co., Ltd. |