CN104139283B - The preparation method of pressure backfill type pipeline - Google Patents
The preparation method of pressure backfill type pipeline Download PDFInfo
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- CN104139283B CN104139283B CN201410377157.6A CN201410377157A CN104139283B CN 104139283 B CN104139283 B CN 104139283B CN 201410377157 A CN201410377157 A CN 201410377157A CN 104139283 B CN104139283 B CN 104139283B
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- steel plate
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- pipe
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- 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
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The preparation method that the invention discloses a kind of pressure backfill type pipeline, it comprises following steps: step 1: pipe prefabrication, carries out cutting and the bevel of steel plate after steel plate is rule; Step 2: steel plate is wound into pipe by cold coiling mode; Step 3: connection section welding, the single-unit pipe of winding is placed on to the section of connection on multiple support rollers of chassis, after preheating, adopt arc welding or Lincoln weld to weld; Step 4: preservative treatment, first carry out antirust pretreatment by ball blasting method effects on surface, after pretreatment, carry out anticorrosion; Hence one can see that, and the preparation method of pressure backfill type pipeline of the present invention can effectively be applied to flexibility and imbed, and allows pipeline Free Transform in backfill, to discharge stress; And applicability is strong, is applicable to catalase, covers bed thickness, the environment of physical features inequality.
Description
Technical field
The present invention relates to the technical field that pipeline is made, relate in particular to a kind of pressure backfill type pipelinePreparation method.
Background technology
Along with improving constantly of people's living standard, various capital constructions are also more and more, as electricityStand etc., although this capital construction is for mankind's service, in order to realize such basisBuild, often need to carry out pipeline construction, both utilized required pipeline to realize water, circuit etc.Conveying and transport, but along with the progressively attention of people to environment, equally also wish this basisConstruction can reduce the impact on environment as much as possible, and, in pipeline construction, due to environmentComplexity, physical features inequality, is uneven, and also to pipe laying, construction has proposed more and more higher requirement.
Fix and construct in order to realize pipeline, taking into account protection of the environment and vegetation, designers simultaneouslySolve this problem by backfill type soft-constraint pipe laying method.
But this construction method is had relatively high expectations to pipeline, not only need the pressure that coupling is larger,Also need to bear more complicated stressing conditions, this just has higher requirement to pipeline.
For this reason, designer of the present invention is because above-mentioned defect, by concentrating on studies and designing,Comprehensive experience and the achievement of being engaged in for many years related industry for a long time, research and design goes out a kind of pressure backfillThe preparation method of formula pipeline, to overcome above-mentioned defect.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the defect of prior art, provide a kind of and pressThe preparation method of power backfill type pipeline, can adapt to the requirement of backfill type soft-constraint pipe laying method, suitableShould be wider, have more practicality.
For addressing the above problem, the invention discloses a kind of making side of pressure backfill type pipelineMethod, is characterized in that comprising following steps:
Step 1: pipe prefabrication
Steel plate is rule, after line, carry out cutting and the bevel of steel plate, work as steel plate thicknessWhile being not more than 22mm, adopt single " V " type groove, in the time that steel plate thickness is greater than 22mm, welderingSeam groove is symmetrical " X " type groove, to realize the accurate location of steel plate in follow-up welding;
Step 2: be wound into pipe
By cold coiling mode, steel plate is wound into pipe, it adopts the starting the arc of two 630t steel platesForcing press is to the prefabricated radian in steel plate termination;
In coiling, must carry out according to following requirement:
Roll bending direction is consistent with the rolling direction of steel plate, with in avoiding reeling again, destroy steel plate inPortion's character;
After rolling shaping, carry out curvature correction;
Step 3: connection section welding
By winding single-unit pipe be placed on the section of connection on multiple support rollers of chassis, by each holderWheel is in same elevation plane to ensure tube coupling linearity, and the inside of described pipeline is provided with supportPart, so that penstock keeps circularity in welding;
Then carry out weld preheating, adopt crawler type heating plate butt welded seam to carry out preheating, preheating is wideDegree is each 3 times of thicknesss of slab of weld seam and both sides, center and be not less than 150mm, 100 DEG C of preheat temperatures～120℃；
After preheating, adopt arc welding or Lincoln weld to weld, welding process is in strict accordance with pressingSweating heat input formula in ASME IX:
Welding procedure is: speed of welding is 80mm/min, and weldingvoltage is 30V, heat inputBe controlled at 2700～3500J/mm, welding current is 130-150A, so that each pipe joint is welded asIntegrated piping;
Step 4: preservative treatment
First by ball blasting method, antirust pretreatment is carried out in the surface of pipeline, after pretreatment at pipelineInwall carries out anticorrosion, due to the direct contact liq of inwall, and therefore brushing twice epoxy on inwallLacquer type organic coating, 2 hours, interval between twice brushing, film thickness 500 μ m, then at pipelineOuter wall is wound around anticorrosion adhesive tape, derusting grade Sa2.0 level after being coated with priming.
Wherein: pre-fix in the welding preheating of the step 3 line pipe road that advances, fixing laggard at pipelineThe spot welding of row periphery is fixed, and to realize connection between any two, thereby makes follow-up welding moreFirmly, the longitudinal joint counterpart dislocation limit deviation in 2-section pipe road is not more than 10%, and is not more than2mm, uneven place is used and presses code, chock to flatten.
Known by said structure, the preparation method of pressure backfill type pipeline of the present invention have asLower technique effect:
(1) pressure pipeline can effectively be applied to flexibility and imbeds, and allows pipeline freely to become in backfillShape, to discharge stress;
(2) applicability is strong, and pipeline is applicable to catalase, covers bed thickness, the environment of physical features inequality;
(3) less demanding to ground, can shorten the digging time of pressure pipeline greatly.
Detailed content of the present invention can obtain by explanation described later and institute's accompanying drawing.
Brief description of the drawings
Fig. 1 has shown the front view of the present invention's section of connection welding.
Fig. 2 has shown the side view of the present invention's section of connection welding.
Detailed description of the invention
The preparation method of pressure backfill type pipeline of the present invention comprises following steps:
Step 1: pipe prefabrication
Steel plate is rule, and meeting a pipe joint road can only have a longitudinal seam line, adjacent tubesThe longitudinal seam line of joint should stagger more than 300mm.
After line, mark the numbering of duct segments, merogenesis, piecemeal, water (flow) direction, level andVertical center line, the symbols such as bevel angle and line of cut.
After line, carry out cutting and the bevel of steel plate, must not use electric arc cutting, when steel plate thickWhen being not more than 22mm, degree adopts single " V " type groove, in the time that steel plate thickness is greater than 22mm,Weld groove is symmetrical " X " type groove, to realize the accurate location of steel plate in follow-up welding;
Step 2: be wound into pipe
By cold coiling mode, steel plate is wound into pipe, it adopts the starting the arc of two 630t steel platesForcing press is to the prefabricated radian in steel plate termination.
By continuous discovery, in coiling, must carry out according to following requirement:
Roll bending direction is consistent with the rolling direction of steel plate, with in avoiding reeling again, destroy steel plate inPortion's character;
After rolling shaping, carry out curvature correction.
Step 3: connection section welding
By winding single-unit pipe be placed on multiple support rollers of chassis 11 as shown in Figure 1, 2The section of connection on 12, by each support roller 12 in same elevation plane to ensure tube coupling linearity,The inside of described pipeline is provided with support member 13, and described support member 13 comprises annulus and is arranged at circleMultiple jack of ring outer peripheral edges, described multiple jack are from the footpath of annulus outer peripheral edges equi-spaced apartTo outwards extending, so that pipeline keeps circularity in welding.
Then carry out weld preheating, adopt crawler type heating plate butt welded seam to carry out preheating, preheating is wideDegree is each 3 times of thicknesss of slab of weld seam and both sides, center and be not less than 150mm, 100 DEG C of preheat temperatures～120℃。
After preheating, adopt arc welding or Lincoln weld to weld, welding process is in strict accordance with pressingSweating heat input formula in ASME IX:
Welding procedure is: speed of welding is 80mm/min, and weldingvoltage is 30V, heat inputBe controlled at 2700～3500J/mm, welding current is 130-150A, so that each pipe joint is welded asIntegrated piping.
Step 4: preservative treatment
First by ball blasting method, antirust pretreatment is carried out in the surface of pipeline, by air compressor machine air feed,Compressed air after filtration, except deoiling, water, pressure 0.6Mpa, 60 °～70 ° of jet angles,Jet length 100～200mm, wherein, after pipeline rust cleaning, blows off with dry compressed air,If find, surface contamination should re-start processing.
After pretreatment, carry out anticorrosionly at inner-walls of duct, due to the direct contact liq of inwall, therefore existBrushing twice epoxy resin coating on inwall, 2 hours, interval between twice brushing, film thickness500μm。
Then after being coated with priming, pipeline outer wall is wound around anticorrosion adhesive tape, derusting grade Sa2.0 level.
The STEpoxyMastic epoxy resin coating that anti-corrosion material adopts DensoLtd company to produceWith Densopol80HTMarineTape anticorrosion adhesive tape.
Wherein, the painting layer smooth surface of brushing, color uniformity, without elephant skin, foaming,The defects such as sagging, pin hole, crackle, holiday; Cement mortar coating layer thickness is basically identical, adheres to jailGu, do not play powdery. Paint thickness is measured with infrared ray paint film thickness gauge. Adhesive tape is wound around anti-Rotten layer surface should be smooth, overlap joint evenly, without permanent bubble, fold and breakage.
Optionally, before the welding preheating of step 3, can carry out pipeline and pre-fix, at pipelineAfter fixing, carry out periphery spot welding and fix, to realize connection between any two, thereby make follow-upWeld more firmly, the longitudinal joint counterpart in 2-section pipe road dislocation limit deviation is not more than 10%, andBe not more than 2mm, uneven place is used and presses code, chock to flatten.
Pipe applications of the present invention is in the Nan Derui of republic of Fiji Islands vatu (Nadarivatu) waterIn the application of power plant project, obtained effective confirmation, this Hydropower Project is positioned at Fijian VitiLevuThe middle and south, island, 177 ° 49 ' 3 of dam site place east longitude ", 17 ° 18 ' 30, south latitude " and, apart from NadiAirport 135km, apart from the about 300km in capital Suva, this project mainly comprises: barrage, defeatedWater system, Power Plant, 132KV switchyard and ultra-high-tension power transmission line, the Main Function of engineeringIt is barrage reservoir impoundment power generation.
By concrete application, adopt after pipeline of the present invention, go through water-filling and built pressure, emptyingPerforate inspection, the test of the moving discharge special topic of mechanical type rejection of full load, the trial run of unit rejection of full loadTest, the moving water running test of long-term set grid-connection commercial off-the-shelf, fully verified the present inventionObtained success, design principle and the construction method with scientific research and innovation possess greatly completelyThe value that power is applied, its technology is ripe, safe and reliable.
Known by said structure, the invention has the advantages that:
(1) pressure pipeline can effectively be applied to flexibility and imbeds, and allows pipeline freely to become in backfillShape, to discharge stress;
(2) applicability is strong, and pipeline is applicable to catalase, covers bed thickness, the environment of physical features inequality;
(3) less demanding to ground, can shorten the digging time of pressure pipeline greatly.
It is evident that above description and to record be only for example instead of in order to limit thisDisclosure of an invention content, application or use. Although described in an embodiment and attachedEmbodiment has been described in figure, but the present invention do not limit by accompanying drawing example and in an embodiment describeTo implement the specific examples of instruction of the present invention, of the present invention as the optimal mode of thinking at presentScope will comprise any embodiment that falls into description above and appended claim.
Claims (2)
1. a preparation method for pressure backfill type pipeline, is characterized in that comprising following steps:
Step 1: pipe prefabrication
Steel plate is rule, after line, carry out cutting and the bevel of steel plate, in the time that steel plate thickness is not more than 22mm, adopt single " V " type groove, in the time that steel plate thickness is greater than 22mm, weld groove is symmetrical " X " type groove, to realize the accurate location of steel plate in follow-up welding;
Step 2: be wound into pipe
By cold coiling mode, steel plate is wound into pipe, it adopts two 630t steel plate starting the arc forcing presses to the prefabricated radian in steel plate termination;
In coiling, must carry out according to following requirement:
Roll bending direction is consistent with the rolling direction of steel plate, to avoid destroying the inside character of steel plate in coiling;
After rolling shaping, carry out curvature correction;
Step 3: connection section welding
By winding single-unit pipe be placed on the section of connection on multiple support rollers of chassis, by each support roller in same elevation plane to ensure tube coupling linearity, the inside of described pipeline is provided with support member, so that penstock keeps circularity in welding;
Then carry out weld preheating, adopt crawler type heating plate butt welded seam to carry out preheating, preheating width is the each 3 times of thicknesss of slab in weld seam and both sides, center and is not less than 150mm, 100 DEG C～120 DEG C of preheat temperatures;
After preheating, adopt arc welding or Lincoln weld to weld, welding procedure is: speed of welding is 80mm/min, and weldingvoltage is 30V, and hot input control is at 2700～3500J/mm, and welding current is 130-150A, so that each pipe joint is welded as to integrated piping;
Step 4: preservative treatment
First by ball blasting method, antirust pretreatment is carried out in the surface of pipeline, after pretreatment, carry out anticorrosion at inner-walls of duct, due to the direct contact liq of inwall, therefore brushing twice epoxy resin coating on inwall, 2 hours, interval between twice brushing, film thickness 500 μ m are then wound around anticorrosion adhesive tape, derusting grade Sa2.0 level after pipeline outer wall is coated with priming.
2. preparation method as claimed in claim 1, it is characterized in that: pre-fix in the weld preheating of the step 3 line pipe road that advances, after pipeline is fixing, carrying out periphery spot welding fixes, to realize connection between any two, thereby make follow-up welding more firm, the longitudinal joint counterpart dislocation limit deviation in 2-section pipe road is not more than 10%, and is not more than 2mm, and uneven place is used and presses code, chock to flatten.
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| CN201410377157.6A CN104139283B (en) | 2014-08-01 | 2014-08-01 | The preparation method of pressure backfill type pipeline |
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| CN104139283B true CN104139283B (en) | 2016-05-25 |
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| CN106271404B (en) * | 2016-08-15 | 2018-08-24 | 鞍钢重型机械有限责任公司 | A kind of production method of large size Water distribution circular pipe |
| CN108817607A (en) * | 2018-07-10 | 2018-11-16 | 湖南机电职业技术学院 | Wind-power electricity generation stake welding procedure |
| CN110625193B (en) * | 2019-09-30 | 2020-09-29 | 中国船舶重工集团柴油机有限公司 | Cutting method, system and processing system for air port of cylindrical scavenging air box |
| CN113352571B (en) * | 2021-05-10 | 2023-06-02 | 乌鲁木齐联塑科技发展有限公司 | Extrusion end correction type polyvinyl chloride pipe production stub bar treatment method |
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| CN1291691A (en) * | 2000-12-11 | 2001-04-18 | 侯贤忠 | Split-type pipe with multi-layer wall and its making method |
| FR2905289B1 (en) * | 2006-08-31 | 2009-04-17 | Valeo Systemes Thermiques | TUBE REALIZATION METHOD FOR HEAT EXCHANGER, TUBE OBTAINED BY SUCH A METHOD AND HEAT EXCHANGER HAVING SUCH A TUBE. |
| JP2009222172A (en) * | 2008-03-18 | 2009-10-01 | Takashi Makuta | Water supply pipe and its manufacturing method |
| CN102240898A (en) * | 2010-05-12 | 2011-11-16 | 杨铁君 | Preparation method for heat exchange tube used for extracting temperature of sewage |
| CN102022588A (en) * | 2010-08-27 | 2011-04-20 | 广东联塑科技实业有限公司 | Plastic-lined steel plastic composite tube and manufacturing method thereof |
| CN103008988B (en) * | 2013-01-04 | 2016-03-23 | 哈尔滨工业大学 | The method of internal joint patch weldering exempted from by a kind of anticorrosive steel pipeline |
| CN103307367A (en) * | 2013-06-05 | 2013-09-18 | 南通耀龙金属制造有限公司 | Stainless steel drinking water pipeline and manufacturing method thereof |
| CN103307371A (en) * | 2013-06-05 | 2013-09-18 | 南通耀龙金属制造有限公司 | Stainless steel corrosion-resistant sewage pipeline and manufacturing method thereof |
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