CN103143888A - Method for manufacturing on-site pipeline type expansion joint - Google Patents
Method for manufacturing on-site pipeline type expansion joint Download PDFInfo
- Publication number
- CN103143888A CN103143888A CN2013100551565A CN201310055156A CN103143888A CN 103143888 A CN103143888 A CN 103143888A CN 2013100551565 A CN2013100551565 A CN 2013100551565A CN 201310055156 A CN201310055156 A CN 201310055156A CN 103143888 A CN103143888 A CN 103143888A
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- China
- Prior art keywords
- expansion joint
- gusset
- roll bending
- bending pipe
- pipeline
- Prior art date
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 20
- 238000000034 method Methods 0.000 title abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 18
- 238000013000 roll bending Methods 0.000 claims description 56
- 230000011218 segmentation Effects 0.000 claims description 35
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 7
- 239000010935 stainless steel Substances 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The invention discloses a method for manufacturing an on-site pipeline type expansion joint applied to an environment with large environmental temperature change and strong corrosivity. The device has the characteristic of convenient maintenance. The method comprises the following steps: A. selecting a rib plate and a plate rolling pipe plate; B. cutting a rib plate into a circular rib plate, so that the inner diameter of the rib plate is equal to the outer diameter of the pipeline; C. tightly attaching the inner diameter part of the rib plate to the outer circumference of the pipeline, and hermetically welding the inner diameter part of the rib plate with the outer circumference of the pipeline to enable the rib plate to protrude out of the pipeline; D. cutting the coiled pipe plate into a coiled pipe with the width equal to the distance between two adjacent rib plates; E. and the long side part of the coiled plate pipe is hermetically welded with the outer circumferential parts of the two adjacent rib plates, so that the coiled plate pipe and the two adjacent rib plates form a pipeline type expansion joint corrugation with a cavity. The invention can select the material of the expansion joint according to the environment, can realize multiple times of repair and local replacement, can be repeatedly used, and can replace the finished product of the stainless steel corrugated expansion joint.
Description
Technical field
The present invention relates to be applied in the preparation method of the on-the-spot duct type expansion joint in the environment that variation of ambient temperature is large, corrosivity is strong.
Background technology
The flue gas sulfur-bearing that copper smelting plant produces is very heavy, can not externally discharge, thereby take pipeline to collect flue gas and make sulfuric acid, and, in actual application, pipeline is carried SO
2during high-temperature flue gas, institute's expansion joint that adopts in actual use, the condensation acid corrosion that will be produced by flue gas condensing about 3～5 months is under normal circumstances bored a hole, and way in the past adopts the making chuck, the filling clay carries out shutoff, leakproof, but like this in stopping reproducing process, pipeline expands with heat and contract with cold and just can't realize convergent-divergent, therefore when stopping reproducing, pipeline just there will be drawing crack at every turn, and the stainless steel expansion joint replacement cost is very high, and after changing, service life is too of short duration again, so every secondary device will be processed it in the start-stop process, cause impact to produce and exist potential safety hazard.There is following problem:
1, service life is short: former expansion joint adopts stainless steel finished product expansion bellow, and its coefficient of expansion all can meet its use under hot environment, but its ripple joint stainless steel is partially thin, causes its life cycle shorter.
2, entreprise cost is high: because its ripple is partially thin, as on the make increased the stainless thickness of its ripple, its manufacturing process and cost all can increase, and it can't be born by enterprise more with regard to high cost originally.
3, repair and maintenance difficulty: due to realizing by the flexible of ripple of the expansion of expansion joint, once but after its corrosion failure, it can't be repaired substantially, and its replacing is very consuming time, once change, to cause copper smelting enterprise and the sulphuric acid production enterprises of its upper level to stop production simultaneously, to enterprise, bring immeasurable loss.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method that facilitates the on-the-spot duct type expansion joint of repair and maintenance.
The technical solution adopted for the present invention to solve the technical problems is: the preparation method of on-the-spot duct type expansion joint comprises the following steps:
A, selection gusset sheet material and roll bending pipe plate;
B, gusset sheet material is cut into to circular gusset, makes the internal diameter of gusset equal the external diameter of pipeline;
C, the gusset inner-diameter portion whose is close to the pipeline excircle, allows gusset inner-diameter portion whose and pipeline excircle seal welding, gusset is given prominence to outside pipeline;
D, the roll bending pipe plate is cut into to the roll bending pipe that width equals the distance of two adjacent gussets;
E, by the long leg of roll bending pipe, divide the excircle part seal welding with adjacent two gussets, make roll bending pipe and adjacent two gussets surround the duct type expansion joint ripple with cavity.
Further, described gusset is comprised of the segmentation gusset.
Further, described roll bending pipe is comprised of segmentation roll bending pipe.
Further, described segmentation gusset and segmentation roll bending pipe are three sections.
Further, the structure of drawing over to one's side by segmentation roll bending pipe drawing in segmentation roll bending pipe two ends convenient welding.
Further, the short tube communicated with cavity at roll bending pipe bottom welding, short tube is connected with flange.
The invention has the beneficial effects as follows: gusset of the present invention and roll bending pipe plate can be according to on-the-spot requirement of strength, and corresponding special sheet material is selected in anticorrosive requirement.Can substitute the practicality of finished product stainless steel wave line expansion joint, on-the-spot processing is simple, reduces costs.If the expansion joint for pipeline corrosion and damage of field fabrication, can adopt identical sheet material to carry out repair welding in the situation that do not stop production.If be the former expansion joint for pipeline corrosion and damage of non-field fabrication, in the situation that do not remove former expansion joint for pipeline, in original expansion joint for pipeline is wrapped in, can complete maintenance.The present invention can be in the situation that corrosion realizes repeatedly reparation, local replacing, Reusability.Be produced on the application in actual production by on-the-spot duct type expansion joint, conscientiously saved the repair time, and reduced the off-time of system and, on the impact of environment, guaranteed the safety in production of whole production system.
The accompanying drawing explanation
Fig. 1 is gusset of the present invention;
Fig. 2 is segmentation gusset of the present invention;
Fig. 3 is roll bending pipe of the present invention;
Fig. 4 is segmentation roll bending pipe of the present invention;
Fig. 5 is the front view of invention;
Fig. 6 is the cutaway view of Fig. 5 along A-A;
Fig. 7 is the structural representation after installing web plate;
Fig. 8 is structural representation of the present invention;
Mark in figure: the 1-pipeline, the 2-gusset, 21-segmentation gusset, 3-roll bending pipe, 31-segmentation roll bending pipe, 4-draws structure over to one's side, 5-flange, 6-cavity.
The specific embodiment
Below in conjunction with embodiment, the present invention will be further described.
As shown in Fig. 1,2,3,4,5,6,7,8, the preparation method of on-the-spot duct type expansion joint comprises the following steps:
A, selection gusset sheet material and roll bending pipe plate;
B, gusset sheet material is cut into to circular gusset 2, makes the internal diameter of gusset 2 equal the external diameter of pipeline 1;
C, gusset 2 inner-diameter portion whose are close to pipeline 1 excircle, allow gusset 2 inner-diameter portion whose and pipeline 1 excircle seal welding, gusset 2 is given prominence to outside pipeline 1;
D, the roll bending pipe plate is cut into to the roll bending pipe 3 that width equals the distance of two adjacent gussets 2;
E, by the long leg of roll bending pipe 3, divide the excircle part seal welding with adjacent two gussets 2, make roll bending pipe 3 and adjacent two gussets 2 surround the duct type expansion joint ripple with cavity 6.
Gusset sheet material and roll bending pipe plate can be according to on-the-spot requirement of strength, and corresponding special substance is selected in anticorrosive requirement.If by pipeline 1 be common material, can select general steel plate to make, and corrosive gas can adopt part special substance or full special substance.Before making the present invention, the external diameter of first measuring channel 1, be cut into the internal diameter of gusset 2 annulus equated with pipeline 1 external diameter, as shown in Figure 1.After gusset 2 is connected on pipeline 1, as shown in Figure 7.Measure the distance of adjacent two gussets 2 and the outer perimeter of gusset 2, outer perimeter is the corresponding girth of gusset 2 external diameter.Then according to the distance of adjacent two gussets 2 and the outer perimeter cutting roll bending pipe 3 of gusset 2.As shown in Figure 3.The integral body of every a pair of gusset 2 and roll bending pipe 3 compositions is a ripple of expansion joint for pipeline.The on-the-spot duct type expansion joint of making by the present invention, can substitute the practicality of finished product stainless steel wave line expansion joint, and on-the-spot processing is simple, reduces costs.If the expansion joint for pipeline of field fabrication damages, the part Partial Resection that can adopt the mode such as gas cutting to corrode, then after foreign material are cleared up, adopt the sheet material of identical material to carry out repair welding and get final product.If the former expansion joint that non-the present invention makes is subject to corrosion failure as stainless steel expansion joint, can be in the situation that do not remove former expansion joint, do not stop production and make on-the-spot duct type expansion joint on former expansion joint.In only original expansion joint for pipeline need being wrapped in.During cutting gusset 2, the width of gusset 2 can determine according to former expansion joint coefficient, then according to above-mentioned same steps as, make on-the-spot duct type expansion joint.Cable and pipeline around not affecting, the present invention can be in the situation that corrosion realizes repeatedly reparation, local replacing, Reusability.Be produced on the application in actual production by on-the-spot duct type expansion joint, conscientiously saved the repair time, and reduced the off-time of system and, on the impact of environment, guaranteed the safety in production of whole production system.
The sheet material area that the roll bending pipe 3 of an integral body of cutting needs is larger, and the remaining roll bending pipe 3 of cutting is too much, waste sheet material, and cost is higher.So, as preferred embodiment, as shown in Figure 4, described roll bending pipe 3 is comprised of segmentation roll bending pipe 31.After sheet material is cut into to segmentation, form whole roll bending pipe 3, after section cutting, can make this scene duct type expansion joint in the situation that do not stop production, or maintenance duct type expansion joint, utilize fully sheet material, cost-saving.
While adopting segmentation gusset 21 described above and segmentation roll bending pipe 31 to make on-the-spot duct type expansion joint, segmentation gusset 21 and segmentation pipe crimping plate 31 can be two sections, three sections etc., hop count too much can increase the working strength of welding, so in the situation that simple to operate and saving sheet material, as preferred embodiment, as shown in Figure 2,4, described segmentation gusset 21 and segmentation roll bending pipe 31 are three sections.
That in segmentation roll bending pipe 31 two ends convenient welding, segmentation roll bending pipe 31 is drawn over to one's side draws structure over to one's side.As shown in Figure 6.In order to allow segmentation roll bending pipe 31 can just wrap the excircle part of gusset 2, so the length of segmentation roll bending pipe 31 equates with the external diameter of gusset annulus 2, for 31 docking of segmentation roll bending pipe are welded, allow 31 splicings of segmentation roll bending pipe form a complete roll bending pipe 3, if the structure of not drawing over to one's side, manually with hand extruding segmentation roll bending pipe 31, make it draw docking over to one's side, then joint is welded, because segmentation volume semicanal 31 is more smooth, be difficult for extruding, for convenient, segmentation roll bending pipe 31 is drawn over to one's side, convenient welding, so at segmentation roll bending pipe 31 two ends, arrange convenient segmentation roll bending pipe 31 is drawn over to one's side draw structure 4 over to one's side.
The short tube communicated with cavity 6 at roll bending pipe 3 bottom weldings, short tube is connected with flange 5.As shown in Figure 6.Pipeline 1 is when work, after the corrosive gas condensation liquefaction, be accumulated in pipeline 1 bottom, accumulate too much corrosive liquids easily by pipeline 1 bottom corrosion, and then corrosion expansion joint, so the short tube communicated at the cavity 6 surrounded with gusset 2 and roll bending pipe 3 at roll bending pipe 2 bottom weldings is convenient by the corrosive liquids discharge, the flange 5 of connection is convenient to be connected with other pipelines.
Claims (6)
1. the preparation method of on-the-spot duct type expansion joint is characterized in that:
A, selection gusset sheet material and roll bending pipe plate;
B, gusset sheet material is cut into to circular gusset (2), makes the internal diameter of gusset (2) equal the external diameter of pipeline (1);
C, gusset (2) inner-diameter portion whose is close to pipeline (1) excircle, allows gusset (2) inner-diameter portion whose and pipeline (1) excircle seal welding, gusset (2) is given prominence to outside pipeline (1);
D, the roll bending pipe plate is cut into to the roll bending pipe (3) that width equals the distance of two adjacent gussets (2);
E, by the long leg of roll bending pipe (3), divide the excircle part seal welding with adjacent two gussets (2), roll bending pipe (3) and adjacent two gussets (2) are surrounded there is cavity the duct type expansion joint ripple of (6).
2. the preparation method of on-the-spot duct type expansion joint as claimed in claim 1, it is characterized in that: described gusset (2) is comprised of segmentation gusset (21).
3. the preparation method of on-the-spot duct type expansion joint as claimed in claim 1, it is characterized in that: described roll bending pipe (3) is comprised of segmentation roll bending pipe (31).
4. the preparation method of on-the-spot duct type expansion joint as claimed in claim 2 or claim 3, it is characterized in that: described segmentation gusset (21) and segmentation roll bending pipe (31) are three sections.
5. the preparation method of on-the-spot duct type expansion joint as claimed in claim 4 is characterized in that: that in segmentation roll bending pipe (31) two ends convenient welding, segmentation roll bending pipe (31) is drawn over to one's side draws structure (4) over to one's side.
6. the preparation method of on-the-spot duct type expansion joint as claimed in claim 5, it is characterized in that: the short tube communicated with cavity (6) at roll bending pipe (3) bottom welding, short tube is connected with flange (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100551565A CN103143888A (en) | 2013-02-21 | 2013-02-21 | Method for manufacturing on-site pipeline type expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100551565A CN103143888A (en) | 2013-02-21 | 2013-02-21 | Method for manufacturing on-site pipeline type expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103143888A true CN103143888A (en) | 2013-06-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100551565A Pending CN103143888A (en) | 2013-02-21 | 2013-02-21 | Method for manufacturing on-site pipeline type expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103143888A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639669A (en) * | 2013-12-16 | 2014-03-19 | 上海振华重工(集团)股份有限公司 | Method for manufacturing telescopic expansion joint of steel cylinder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2341808A1 (en) * | 1973-05-29 | 1975-01-02 | Fbm Cost Mecc Spa | Heat exchanger construction with butt welded end plates - uses expansion joint on outer casing and temporary tube elongation |
| JPH10311473A (en) * | 1997-05-07 | 1998-11-24 | Chugoku Bendo Kk | Expansion joint for repairing and its installing method |
| CN201149143Y (en) * | 2007-12-20 | 2008-11-12 | 金川集团有限公司 | Flat-shaped expansion pipe joint with two sides of circular arc shape |
| CN201326870Y (en) * | 2008-12-18 | 2009-10-14 | 鞍钢集团房产物业公司 | Leak-proof hood of operating pressure pipeline |
| CN101701657A (en) * | 2009-09-21 | 2010-05-05 | 芜湖新兴铸管有限责任公司 | Device and method for repairing expansion joint of gas pipeline |
| CN201502833U (en) * | 2009-09-21 | 2010-06-09 | 芜湖新兴铸管有限责任公司 | Gas pipeline expansion joint repair device |
| CN202176866U (en) * | 2011-07-21 | 2012-03-28 | 天津渤大硫酸工业有限公司 | Furnace gas pipeline expansion joint provided with protective cover |
-
2013
- 2013-02-21 CN CN2013100551565A patent/CN103143888A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2341808A1 (en) * | 1973-05-29 | 1975-01-02 | Fbm Cost Mecc Spa | Heat exchanger construction with butt welded end plates - uses expansion joint on outer casing and temporary tube elongation |
| JPH10311473A (en) * | 1997-05-07 | 1998-11-24 | Chugoku Bendo Kk | Expansion joint for repairing and its installing method |
| CN201149143Y (en) * | 2007-12-20 | 2008-11-12 | 金川集团有限公司 | Flat-shaped expansion pipe joint with two sides of circular arc shape |
| CN201326870Y (en) * | 2008-12-18 | 2009-10-14 | 鞍钢集团房产物业公司 | Leak-proof hood of operating pressure pipeline |
| CN101701657A (en) * | 2009-09-21 | 2010-05-05 | 芜湖新兴铸管有限责任公司 | Device and method for repairing expansion joint of gas pipeline |
| CN201502833U (en) * | 2009-09-21 | 2010-06-09 | 芜湖新兴铸管有限责任公司 | Gas pipeline expansion joint repair device |
| CN202176866U (en) * | 2011-07-21 | 2012-03-28 | 天津渤大硫酸工业有限公司 | Furnace gas pipeline expansion joint provided with protective cover |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639669A (en) * | 2013-12-16 | 2014-03-19 | 上海振华重工(集团)股份有限公司 | Method for manufacturing telescopic expansion joint of steel cylinder |
| CN103639669B (en) * | 2013-12-16 | 2016-01-20 | 上海振华重工(集团)股份有限公司 | The manufacture method of steel cylinder telescopic expansion joint |
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| PB01 | Publication | ||
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Application publication date: 20130612 |