CN1948836A - Manufacturing technology of water cooling jacket of boiler four angle burning, screw lifting water cooling wall burner region - Google Patents
Manufacturing technology of water cooling jacket of boiler four angle burning, screw lifting water cooling wall burner region Download PDFInfo
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- CN1948836A CN1948836A CN 200610118143 CN200610118143A CN1948836A CN 1948836 A CN1948836 A CN 1948836A CN 200610118143 CN200610118143 CN 200610118143 CN 200610118143 A CN200610118143 A CN 200610118143A CN 1948836 A CN1948836 A CN 1948836A
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Abstract
A manufacturing engineering of a water cooled jacket includes the following steps: dividing the product into small modules, welding modules and then assembling them into an integral one. In the welding technique, the built-in flat steel is set up a welding shrinkage allowance 0.2-0.3 mm and welding adopts a gas-shielded welding. In the manufacture of small modules water-cooled jacket, determining a rational welding shrinkage centre can guarantee the size requirement of burned holes.
Description
Technical field
The present invention relates to a kind of boiler four angle burning, the cold wall burner region water collar of screw lifting manufacturing process belongs to the boiler technology field.
Background technology
The applicant introduces in the super critical boiler of art designs manufacturing of U.S. ALSTOM and adopts corner firing in recent years, the cold wall burner region water wall structure of screw lifting is made the type water collar, at present, do not make precedent at home, and the technology that U.S. ALSTOM provides is incomplete.
The super critical boiler corner firing, the cold wall burner region water collar of screw lifting, appearance and size: high 13734mm, wide 1900mm, form by 252 different bend pipes, and a large amount of annex of welding assembly, take on factory with sets of burners, in the mill, key technical problem is how to solve welding contraction, the welding deformation that causes owing to a large amount of intensive welding, and correction, assemble method guarantee that each size of product satisfies the requirement of drawing.When making similar water collar product in the past, the normal employing carried out overall package with product, in welding, adopt manual electric arc welding, the product of Zhi Zaoing tends to produce appearance and size, bore size control difficulty like this, allowance for shrinkage is difficult to control, proofread and correct difficulty, each size of product is difficult to reach the requirement of drawing.
Summary of the invention
The purpose of this invention is to provide a kind of boiler four angle burning, the cold wall burner region water collar of screw lifting manufacturing process, because the welding that a large amount of irregular welding causes is shunk, the control welding deformation, guarantee that each size of product satisfies the requirement of drawing to solve.
For realizing above purpose, technical scheme of the present invention provides a kind of boiler four angle burning, and the cold wall burner region water collar of screw lifting manufacturing process is characterized in that,
The production sharing little module is assembled,, guaranteed what product was finally assembled from the size of little module control product
Size satisfies the requirement of drawing, and its method is:
One. the welding of little module
The inclined-plane pipe row at the left and right two ends of water collar that step 5. will be detected a flaw refills assembly fixture, and the left and right two ends of water collar tube bending is partly adopted step 2,3 steel plate of burn-oning, the composition little module, and the little module width dimensions requires than the big 3mm～5mm of figure paper size;
Step 6. is arranged at least 15 bend pipes composition water collar intervalve in place on assembly fixture, and with comb shape location-plate straight section and tube end clamping location in the middle of bend pipe, pitch is 13mm-40mm between control valve; Center assembly band steel between every two tubes carries out the spot welding of pipe and band steel then with the gas shielded arc welding of trolley type, the distance of spot welding is 150mm-250mm, and width is put surplus 0.2～0.3mm;
Step 7. adopts step 3-5 to be assembled into the middle little module of water collar;
Two. the module welding
Step 9. marks datum line, position of opening line, length, the width dimensions line of water collar on mounting plate, and dress weldering location backer.The water collar length dimension considers that the welding of annexes such as welded flange plate is shunk and need put surplus, and allowance for shrinkage is that the center with water collar is that benchmark is respectively put 3～5mm to two ends;
Step 10. from the gas shielded arc welding of center little module to the right employing trolley type of both sides the first from left piece, adopts step 2, step 3 welding with each little module assembly unit on mounting plate in the middle of the water collar during assembly unit;
Step 11. adopts the gas shielded arc welding of trolley type at last at two ends, adopt step 2, the left and right module small in ends of step 3 pair water collar to weld, and dress weldering and burner flange connecting;
Step 12. is carried out 100% magnetic powder inspection after the water collar of assembling is unloaded from assembly fixture;
Step 13. pair water collar adopts bulk heat treatmet, and temperature is 730 ℃-780 ℃, and the distortion when preventing heat treatment is supported in the weldering of tapping dress before the heat treatment;
Each size of step 14. heat treatment post-equalization is proofreaied and correct the tube end size, notes controlling heating-up temperature≤790 ℃ during thermal recalibration;
The present invention's employing splits module with product and carries out; treat to be assembled into integral body after the module welding is finished; help controlling integral body and each local size of product like this; aspect welding procedure; the band steel of assembly is provided with the welding allowance for shrinkage of 0.2～0.3mm, and the dress weldering of steel plate reduces welded gaps, and gas shielded arc welding is adopted in welding; in the manufacturing of little module water collar, determine reasonably welding center of compression, guarantee the dimensional requirement of burner perforate.After finishing, the water collar assembling welding of little module is combined into whole water collar; like this can be in manufacture process; progressively control welding contraction, the welding deformation of each one of product; and adopt gas shielded arc welding to reduce welding deformation; adopt this manufacturing technology, the total quality of product, the size of each one can be guaranteed.
Advantage of the present invention is can solve because the welding that a large amount of irregular welding causes is shunk, and the control welding deformation guarantees that each size of product satisfies the requirement of drawing.
Description of drawings
Fig. 1,2 is the assembly fixture structural representation;
Fig. 3,4 is a burner region water wall structure schematic diagram.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
The super critical boiler corner firing, the cold wall burner region water collar of screw lifting, appearance and size: high 13734mm, wide 1900mm, form by 252 different bend pipes,
As shown in Figure 1, 2, be the assembly fixture structural representation, described assembly fixture 8 is made up of framework 1 and underframe 4, and framework 1 is vertical on the underframe 4, and assembly fixture rationally divides into groups by the total length of product, and the length of general assembly fixture is 2～3m.
In manufacture process, the present invention controls the size of every bend pipe, guarantee the correctness of 252 different bend pipes, consider the welding contraction of band steel, the length welding allowance for shrinkage of pipe is 3～4mm, surplus 50mm is respectively put at straight tube place, pipe two ends, in concrete operating process, the present invention adopts left and right sides bending machine to carry out bending of pipe, and proofread and correct sample by the platform sample every pipe curved back, proofreaies and correct and adopts external force correction and thermal recalibration to combine, strict control heating-up temperature during thermal recalibration, the uniformity of heating, forbid overtemperature, adopt the nature cooling behind the thermal recalibration, do not allow to adopt other media such as water to cool off fast, pipe bends the laggard ball check that works, guarantee the workmanship of every bend pipe, adopt during the former manufacturing bend pipe of these technologies, be maturation process.
Aspect welding procedure: all welding require the file of establishment welding procedure specification (WPS) and qualification of welding procedure (PQR) to conform to the standard that requires fully according to " steam boiler safety and technical supervision rules ", and the welding requirements of band steel and pipe is by the manufacturer's standard examination.
All welding pre-heating temperatures in the assembling welding are 〉=10 ℃.Postwelding carries out visual examination.Welding band steel, sealing steel plate are provided with welding contracted quantity 0.3mm, adopt the gas shielded arc welding welding, the employing of these methods can be controlled welding and shrink, and reduces welding deformation.The gas shielded arc welding of trolley type or manual welding welding machine are outsourcing.
Shown in Fig. 3,4, be burner region water wall structure schematic diagram, a kind of boiler four angle burning, the method for the cold wall burner region water collar of screw lifting manufacturing process is:
One. the welding of little module
The inclined-plane pipe row at the left and right two ends of water collar that step 5. will be detected a flaw refills assembly fixture 8, the left and right two ends of water collar pipe 6 sweeps are adopted step 2,3 steel plate 4 of burn-oning, form little module, the little module width dimensions requires than the big 3mm～5mm of figure paper size;
Step 6. is with 25 bend pipes 2 composition water collar intervalve row in place on assembly fixture 8, and with comb shape location-plate 3 straight section and tube end clamping location in the middle of bend pipe 2, pitch is 13mm-40mm between control valve;
Center assembly band steel 5 between every two tubes 2 carries out the spot welding of pipe 2 and band steel 5 then with the gas shielded arc welding of trolley type, the distance of spot welding is 150mm-250mm, and width is put surplus 0.2～0.3mm;
Step 7. adopts step 3-5 to be assembled into the middle little module of water collar;
Two. the module welding
Step 9. marks datum line, position of opening line, length, the width dimensions line of water collar on mounting plate, and dress weldering location backer.The water collar length dimension considers that the welding of annexes such as welded flange plate is shunk and need put surplus, and allowance for shrinkage is that the center with water collar is that benchmark is respectively put 3～5mm to two ends;
Step 10. from the gas shielded arc welding of center little module to the right employing trolley type of both sides the first from left piece, adopts step 2, step 3 welding with each little module assembly unit on mounting plate in the middle of the water collar during assembly unit;
Step 11. adopts the gas shielded arc welding of trolley type at last at two ends, adopt step 2, the left and right module small in ends of step 3 pair water collar to weld, and dress weldering and burner flange connecting 9;
Step 12. is carried out 100% magnetic powder inspection with the water collar of assembling after assembly fixture 8 unloads;
Step 13. pair water collar adopts bulk heat treatmet, and temperature is 750 ℃, and the distortion when preventing heat treatment is supported in the weldering of tapping dress before the heat treatment;
Each size of step 14. heat treatment post-equalization is proofreaied and correct the tube end size, notes controlling heating-up temperature≤790 ℃ during thermal recalibration;
Step 15. cleaning and reconditioning weld seam, logical ball cleaning in the pipe, material and weld seam carry out the spectrum inspection.
The water pressure test of step 16. pipe is checked;
Step 17. is drawn pipe end surplus line by figure, removes pipe end surplus and pipe processing groove;
Inspection of step 18. final size and record;
Carry out the sets of burners dress behind the step 19. water collar paint.Burner adopts bolt to be connected with water collar, dispatches from the factory after the assembling.
Claims (1)
1. boiler four angle burning, the cold wall burner region water collar of screw lifting manufacturing process is characterized in that, the production sharing little module is assembled, from the size of little module control product, guarantee that the size of the final assembling of product satisfies the requirement of drawing, its method is:
One. the welding of little module
Step 1. is with synthetic one group of 2 assembly fixtures (8), and framework two side faces size h tolerance is ± 1mm that the depth of parallelism on the locating surface after the machine tooling is ± 1mm that the diagonal H tolerance of adjacent two frameworks is ± 1.5mm;
Step 2. is assembled (6) 15 elder generations of inclined-plane pipe at the left and right two ends of water collar respectively at least on assembly fixture (8), with comb shape location-plate (3) straight section and tube end clamping location in the middle of bend pipe (2), pitch is 13mm-40mm between control valve; Center assembly band steel (5) between every two tubes (6) carries out the spot welding of pipe (6) and band steel (5) then with the gas shielded arc welding of trolley type, the distance of spot welding is 150mm-250mm, and width is put surplus 0.2～0.3mm;
Step 3. is removed assembly fixture (8) and comb shape location-plate (3), adopts the gas shielded arc welding of trolley type that per two bend pipes (2) are carried out the welding of positive and negative intersection, is welded into pipe row;
Step 4. is carried out 100% magnetic powder inspection with the inclined-plane pipe row of the water collar upper/lower terminal of assembling after assembly fixture (8) unloads;
The inclined-plane pipe row at the left and right two ends of water collar that step 5. will be detected a flaw refills assembly fixture (8), the left and right two ends of water collar pipes (6) sweep is adopted step 2,3 steel plate (4) of burn-oning, form little module, the little module width dimensions requires than the big 3mm～5mm of figure paper size;
Step 6. goes up composition water collar intervalve row in place with at least 15 bend pipes (2) at assembly fixture (8), and with comb shape location-plate (3) straight section and tube end clamping location in the middle of bend pipe (2), pitch is 13mm-40mm between control valve; Center assembly band steel (5) between every two tubes (2) carries out the spot welding of pipe (2) and band steel (5) then with the gas shielded arc welding of trolley type, the distance of spot welding is 150mm-250mm, and width is put surplus 0.2～0.3mm;
Step 7. adopts step 3-5 to be assembled into the middle little module of water collar;
Step 8. repeating step 6-7 is welded into a piece little module;
Two. the module welding
Step 9. marks datum line, position of opening line, length, the width dimensions line of water collar on mounting plate, and dress weldering location backer.The water collar length dimension considers that the welding of annexes such as welded flange plate is shunk and need put surplus, and allowance for shrinkage is that the center with water collar is that benchmark is respectively put 3～5mm to two ends;
Step 10. from the gas shielded arc welding of center little module to the right employing trolley type of both sides the first from left piece, adopts step 2, step 3 welding with each little module assembly unit on mounting plate in the middle of the water collar during assembly unit;
Step 11. adopts the gas shielded arc welding of trolley type at last at two ends, adopt step 2, the left and right module small in ends of step 3 pair water collar to weld, and dress weldering and burner flange connecting (9);
Step 12. is carried out 100% magnetic powder inspection with the water collar of assembling after assembly fixture (8) unloads;
Step 13. pair water collar adopts bulk heat treatmet, and temperature is 730 ℃-780 ℃, and the distortion when preventing heat treatment is supported in the weldering of tapping dress before the heat treatment;
Each size of step 14. heat treatment post-equalization is proofreaied and correct the tube end size, notes controlling heating-up temperature≤790 ℃ during thermal recalibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101181438A CN100557315C (en) | 2006-11-09 | 2006-11-09 | Boiler four angle burning, the cold wall burner region water collar of screw lifting manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101181438A CN100557315C (en) | 2006-11-09 | 2006-11-09 | Boiler four angle burning, the cold wall burner region water collar of screw lifting manufacturing process |
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| CN1948836A true CN1948836A (en) | 2007-04-18 |
| CN100557315C CN100557315C (en) | 2009-11-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913060A (en) * | 2010-08-04 | 2010-12-15 | 江苏申港锅炉有限公司 | Method for machining membrane type water-cooled walls in boilers |
| CN103250000A (en) * | 2010-09-30 | 2013-08-14 | 阿尔斯通技术有限公司 | Bent-out wall in the region of a substantially rectangular burner opening |
| CN104475993A (en) * | 2014-10-30 | 2015-04-01 | 南通虹波机械有限公司 | Manufacture method of thickener closed trough bottom plate |
| CN105290578A (en) * | 2015-11-13 | 2016-02-03 | 江苏绿叶锅炉有限公司 | Chamfering-free pipe row welding technology of ultra-supercritical boiler high-temperature screen type overheater |
-
2006
- 2006-11-09 CN CNB2006101181438A patent/CN100557315C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913060A (en) * | 2010-08-04 | 2010-12-15 | 江苏申港锅炉有限公司 | Method for machining membrane type water-cooled walls in boilers |
| CN103250000A (en) * | 2010-09-30 | 2013-08-14 | 阿尔斯通技术有限公司 | Bent-out wall in the region of a substantially rectangular burner opening |
| CN104475993A (en) * | 2014-10-30 | 2015-04-01 | 南通虹波机械有限公司 | Manufacture method of thickener closed trough bottom plate |
| CN105290578A (en) * | 2015-11-13 | 2016-02-03 | 江苏绿叶锅炉有限公司 | Chamfering-free pipe row welding technology of ultra-supercritical boiler high-temperature screen type overheater |
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| Publication number | Publication date |
|---|---|
| CN100557315C (en) | 2009-11-04 |
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