CN1295032C - Insulating pipeline spray coating opening mending method - Google Patents
Insulating pipeline spray coating opening mending method Download PDFInfo
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- CN1295032C CN1295032C CNB2004100438968A CN200410043896A CN1295032C CN 1295032 C CN1295032 C CN 1295032C CN B2004100438968 A CNB2004100438968 A CN B2004100438968A CN 200410043896 A CN200410043896 A CN 200410043896A CN 1295032 C CN1295032 C CN 1295032C
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Abstract
The present invention relates to an insulating pipeline spraying opening mending method. The present invention mainly solves the problems that a heat shrinking sleeve and a polyethylene yellow jacket-shaped shell used by the existing pipeline opening mending method are easy to separate, and the insulating service life of a pipeline is reduced. The present invention is characterized in that the opening mending of an insulating pipeline is realized by the following procedures that the opening of the pipeline is firstly sprayed with sand for removing rust; an overlapped surface of the opening to be mended is treated; then, base rubber is coated; polyurethane foam is sprayed or poured; finally, polyurea coating material is sprayed; in this way, the opening mending process of the whole insulating pipelines is completed. The opening mending method is free from environment temperature and humidity; the weatherability of material used by mending the opening is good; the separation with a pipeline body is difficult to generate; the insulating pipeline has the advantages of no pulverization, no breaking, no falling when used for a long time outdoors; simultaneously, the material has the advantages of good insulating property and good mechanical property.
Description
Technical field:
The present invention relates to the method for utilidor repaired mouth in the utilidor construction field, belong to a kind of utilidor spraying and welding seam mending method.
Background technology:
At present, utilidor adopts usually at pipeline outer filling Polyurethane foam and with the yellow jacket suitcase of polyethylene and applies, the heat-insulation layer of pipe main body is by prefabricated the finishing of automated job line of special use in factory, technology controlling and process is relatively easy, the quality of its heat-insulation layer and overcoat is reliable, and every pipe ends will be reserved 100-200mm and not do insulation, waits until to carry out repaired mouth again after the on-the-spot welding and handle.On-the-spot repaired mouth adopts the inner wrapping foaming usually, and thermal shrinkable sleeve coats repaired mouth, and it is bigger that this jointing method is influenced by environmental factor and human factor, and heat is melted the bonding work progress makes that shrinking cover easily forms air pocket, air bubble; Thermal shrinkable sleeve polarity is low, and is poor with the compatibility of the yellow jacket skin of polyethylene, along with the increase of service life, the summer in winter alternately, heat shrinking sleeve easily produces with the yellow jacket skin of polyethylene and separates.This jointing method can not form closely continuous heat-insulation system with former heat-insulation layer, becomes the weak link of pipe insulation and influences the quality of whole pipe insulation, the life-span of reducing pipe insulation.
Summary of the invention:
In order to solve existing utilidor jointing method, used heat shrinking sleeve easily produces with the yellow jacket skin of polyethylene and separates, make the problem of pipe insulation life-span reduction, the invention provides a kind of utilidor spraying and welding seam mending method, this jointing method is subjected to such environmental effects little, coating and body intermiscibility are good, and can form closely continuous heat-insulation system with former heat-insulation layer, and do not produce separation.Thereby improved the service life of utilidor.
Technical scheme of the present invention is: this utilidor spraying and welding seam mending method, be after the mouth of pipe of utilidor has welded, to have carried out mouth of pipe derusting by sandblasting, the environmental protection sand-blasting machine is adopted in mouth of pipe derusting by sandblasting, the sand material adopts good 25-40 purpose corundum sand or the steel sand of wearability, and the insulation of its repaired mouth can realize by following step:
1, repaired mouth lap-joint is carried out surface treatment, the lap of splice on the yellow jacket skin of this repaired mouth lap-joint polyethylene surface is 50-200mm, and available flame heat method is handled, and promptly with the yellow jacket skin of remelting rifle heating lap-joint's polyethylene surface, temperature is controlled at 60-80 ℃; Also available corona processor is handled the yellow jacket skin of lap-joint's polyethylene surface, what this corona processor adopted is that application number is 03265518.5 hand push rolling electrode processor, make this surface produce rough matsurface, increased surface tension, the surface produces unsaturated bond simultaneously, and increases the surface energy, like this, lap-joint's insulation layer surface after the processing has extremely strong adhesive force, and with opening-supplementing material good bonding plyability is arranged;
2, brushing primer, primer adopts polyurethane adhesive, during the brushing polyurethane adhesive, should brush at once after handling the yellow jacket skin of polyethylene surface, is coated in yellow jacket skin surface of lap-joint's polyethylene of handling and mouth of pipe place; Also can use powdery copolymer glue to do primer, powdery copolymer glue is sprayed onto mouth of pipe surface and needs on the yellow jacket skin of the polyethylene surface of overlap joint with the flame spraying plastic powder technique rifle, and the temperature on the yellow jacket skin of polyethylene surface that guarantees this mouth of pipe surface and need overlap joint is at 60-80 ℃;
3, spraying or filling polyurethane foam with spraying of carbamide paint spraying equipment or perfusion, after having brushed polyurethane adhesive, carry out the spraying or the perfusion of polyurethane foam at the repaired mouth place; Perhaps when having sprayed powdery copolymer glue, in mouth of pipe temperature and lap-joint's insulation layer surface temperature during at 60-80 ℃, carry out the spraying or the perfusion of polyurethane foam at the repaired mouth place, itself and former polyurethane foam can well be connected be one, to improve the whole repaired mouth quality of utilidor;
4, spray polyurea coating with the spraying of carbamide paint spraying equipment, after spraying or having poured into polyurethane foam, is sprayed on the surface and the yellow jacket skin of the lap-joint's polyethylene surface of polyurethane foam with carbamide paint, and forms the SPUA protective layer.
The present invention has following beneficial effect: because this jointing method has used the carbamide paint opening-supplementing material, and adopt flame heat or corona processor to handle the yellow jacket skin of polyethylene of utilidor mouth of pipe overlap joint, especially adopt corona processor to handle the yellow jacket skin of the polyethylene surface of mouth of pipe overlap joint, this processing method can make the yellow jacket skin of polyethylene surface produce rough matsurface and unsaturated bond, increasing polyethylene yellow jacket skin surface tension and surface can, make the yellow jacket skin of polyethylene surface have extremely strong adhesive force, thereby good bonding plyability is arranged with the carbamide paint opening-supplementing material.Polyurea coating has excellent physical property, weatherability, resistance to ag(e)ing, heatproof good stability; Be subjected to construction environment temperature, humidity effect little, the reaction curing rate is fast, can spray not sagging continuously.
The specific embodiment:
This utilidor spraying and welding seam mending method, be after the mouth of pipe of utilidor has welded, to have carried out mouth of pipe derusting by sandblasting, the environmental protection sand-blasting machine is adopted in mouth of pipe derusting by sandblasting, but reclaim on sandblast limit, limit, the dust, oxide skin etc. that utilize vavuum pump will be sprayed onto the sand grains of metal surface reflection and generation are drawn onto the recovery chamber of sand-blasting machine, after filtration, sand grains is reused.Use this sand-blasting machine, do not have dust in the air, the body surface does not have floating dust, saves further cleaning process, and more than the rust cleaning quality Sa2.5 level, the sand material adopts good 25-40 purpose corundum sand or the steel sand of wearability, and the insulation of its repaired mouth can realize by following step:
1, repaired mouth lap-joint is carried out surface treatment, the length on the yellow jacket skin of this repaired mouth lap-joint polyethylene surface is 50-200mm, available flame heat method is handled, and promptly with the yellow jacket skin of the flame heat lap-joint polyethylene surface of remelting rifle generation, temperature is controlled at 60-80 ℃; Also available corona processor is handled the yellow jacket skin of lap-joint's polyethylene surface, this processing method is that the lap-joint surface is placed between the two poles of the earth of corona discharge, an electrode grounding, another electrode connects high voltage source, two interpolars are discharged, the yellow jacket skin of bombardment polyethylene surface in environment such as air, oxygen, nitrogen.Its surface produces two kinds of variations in the bombardment process, and the one, physical change, i.e. the yellow jacket skin of corona bombardment polyethylene surface produces rough matsurface, increases its surface tension; The 2nd, chemical change, promptly by electrion, ionization airborne oxygen, produce ozone, with insulation layer surface generation chemical reaction, make its surface produce unsaturated bond, increase surperficial energy.Two kinds of variations make the yellow jacket skin of polyethylene surface have extremely strong adhesive force, thereby with opening-supplementing material good bonding plyability are arranged;
2, brushing primer, primer adopt polyurethane adhesive, during the brushing polyurethane adhesive, should brushing at once behind the yellow jacket skin of the polyethylene of handling surface, and the lap-joint polyethylene Huang jacket skin surface and the mouth of pipe place that the primer brushing are being handled with artificial method; Also can use powdery copolymer glue to do primer, powdery copolymer glue is sprayed onto mouth of pipe surface and needs on the yellow jacket skin of the polyethylene surface of overlap joint with the flame spraying plastic powder technique rifle;
3, spraying or filling polyurethane foam, with spraying of carbamide paint spraying equipment or perfusion, after having brushed polyurethane adhesive, carry out the spraying or the perfusion of polyurethane foam, perhaps when having sprayed powdery copolymer glue, during at 60-80 ℃, carry out the spraying or the perfusion of polyurethane foam in mouth of pipe temperature and lap-joint's insulation layer surface temperature, itself and former polyurethane foam can well be connected be one, to improve the whole repaired mouth quality of utilidor;
4, spray polyurea coating with the spraying of carbamide paint spraying equipment, after spraying or having poured into polyurethane foam, is sprayed on carbamide paint on the surface and the yellow jacket skin of the lap-joint's polyethylene surface of polyurethane foam.Carbamide paint is a kind of novel solvent-free, bi-component environmental-protecting coating, and the spraying back can form one deck polyurea elastomer coating by gel in several seconds, just can reach the intensity of walking thereon in a few minutes, the construction efficiency height, and workpiece need not heat.During this coating application, be not subjected to the influence of environment temperature and humidity, good weatherability is used not efflorescence out of doors for a long time, is not ftractureed, do not come off, and this elastomer has excellent heat-insulating property and mechanical performance simultaneously.
Claims (8)
1, a kind of utilidor spraying and welding seam mending method is carried out derusting by sandblasting and is handled after the mouth of pipe of utilidor has welded, it is characterized in that: the utilidor repaired mouth is realized by following step:
A, repaired mouth lap-joint is carried out sided corona treatment or heat treated;
B, brushing primer;
C, spraying or filling polyurethane foam;
D, spray polyurea coating.
2, a kind of utilidor spraying and welding seam mending method according to claim 1 is characterized in that: the anticorrosive coat surface on the yellow jacket skin of repaired mouth lap-joint polyethylene surface is heated to 60 ℃-80 ℃ with the remelting rifle.
3, a kind of utilidor spraying and welding seam mending method according to claim 1, it is characterized in that: the processing that the yellow jacket skin of repaired mouth lap-joint polyethylene surface is carried out, use the corona processor processing, make the yellow jacket skin of lap-joint's polyethylene surface produce rough matsurface.
4, according to claim 1,2 or 3 described a kind of utilidor spraying and welding seam mending methods, it is characterized in that: the lap of splice on the yellow jacket skin of repaired mouth lap-joint polyethylene surface is 50-200mm.
5, a kind of utilidor spraying and welding seam mending method according to claim 1 is characterized in that: primer adopts polyurethane adhesive.
6, a kind of utilidor spraying and welding seam mending method according to claim 1 is characterized in that: primer adopts powdery copolymer glue.
7, a kind of utilidor spraying and welding seam mending method according to claim 1, it is characterized in that: adopt the method filling polyurethane foam of carbamide paint spraying equipment, and equate with the thickness of former urethane foam coating in repaired mouth place polyurethane spray foam or employing perfusion.
8, a kind of utilidor spraying and welding seam mending method according to claim 1 is characterized in that: adopt the carbamide paint spraying equipment carbamide paint to be sprayed on the surface and the yellow jacket skin of the lap-joint's polyethylene surface of polyurethane foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100438968A CN1295032C (en) | 2004-09-27 | 2004-09-27 | Insulating pipeline spray coating opening mending method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100438968A CN1295032C (en) | 2004-09-27 | 2004-09-27 | Insulating pipeline spray coating opening mending method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1597141A CN1597141A (en) | 2005-03-23 |
| CN1295032C true CN1295032C (en) | 2007-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100438968A Active CN1295032C (en) | 2004-09-27 | 2004-09-27 | Insulating pipeline spray coating opening mending method |
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| CN (1) | CN1295032C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504104B (en) * | 2008-10-16 | 2013-07-10 | 吴发东 | Mouth compensating method for pipeline corrosion protection layer and integrated mouth compensating machine |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101074352B (en) * | 2006-05-18 | 2010-04-14 | 中国石油天然气集团公司 | Opening-supplementing material for sea-bottom oil-gas pipeline |
| CN100429451C (en) * | 2006-11-22 | 2008-10-29 | 中国石油天然气股份有限公司 | Joint coating method for oil gas pipeline after repairing the corrosion detection |
| CN101660647B (en) * | 2009-09-21 | 2011-03-30 | 大庆油田有限责任公司 | Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology |
| CN101709821B (en) * | 2009-12-09 | 2011-01-05 | 北京北科双元涂料科技有限公司 | Method for joint coating on pipeline by heat-shrinkable tape |
| CN101776195B (en) * | 2010-03-12 | 2011-06-29 | 中国海洋石油总公司 | Polyurea elastomer waterproof sealing structure used for benthal single-layer heat-insulation pipe |
| CN102679086A (en) * | 2011-03-18 | 2012-09-19 | 中国石油天然气集团公司 | Intermediate-frequency heating repaired opening construction technology for thermal contraction band of buried steel pipeline |
| CN104708802B (en) * | 2013-12-13 | 2017-06-06 | 哈尔滨朗格斯特节能科技有限公司 | Prefabricated direct-buried thermal insulation pipe high density polyethylene (HDPE) and hard polyaminoester combined process |
| CN112283467A (en) * | 2020-10-22 | 2021-01-29 | 刘志峰 | Polyurethane spraying outer protective pipe spraying integrally formed insulation pipe on-site joint coating installation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031723A (en) * | 1988-06-08 | 1989-03-15 | 许文庆 | The outer and inner walls of steel pipe bundle aseptic technic |
| JPH03278859A (en) * | 1990-03-29 | 1991-12-10 | Nippon Steel Corp | Heavy corrosion-proof coated steel pipe pile and manufacture thereof |
| CN1057612A (en) * | 1991-08-07 | 1992-01-08 | 慈溪市彭桥玻纤制品厂 | Reinforced adhesive band made of plastics-coated glass fibre and manufacture method |
| CN1185466A (en) * | 1996-09-30 | 1998-06-24 | 威廉·J·布林顿 | Corrosion-resisting polyureas coating |
| JP3278859B2 (en) * | 1991-03-25 | 2002-04-30 | ソニー株式会社 | Scramble system |
| CN2536875Y (en) * | 2002-04-24 | 2003-02-19 | 大庆油田建材制造安装有限责任公司 | Polyurethane corrosionproof thermal insulating pipeline |
| JP2007136218A (en) * | 2003-10-11 | 2007-06-07 | Aruze Corp | Game machine |
-
2004
- 2004-09-27 CN CNB2004100438968A patent/CN1295032C/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031723A (en) * | 1988-06-08 | 1989-03-15 | 许文庆 | The outer and inner walls of steel pipe bundle aseptic technic |
| JPH03278859A (en) * | 1990-03-29 | 1991-12-10 | Nippon Steel Corp | Heavy corrosion-proof coated steel pipe pile and manufacture thereof |
| JP3278859B2 (en) * | 1991-03-25 | 2002-04-30 | ソニー株式会社 | Scramble system |
| CN1057612A (en) * | 1991-08-07 | 1992-01-08 | 慈溪市彭桥玻纤制品厂 | Reinforced adhesive band made of plastics-coated glass fibre and manufacture method |
| CN1185466A (en) * | 1996-09-30 | 1998-06-24 | 威廉·J·布林顿 | Corrosion-resisting polyureas coating |
| CN2536875Y (en) * | 2002-04-24 | 2003-02-19 | 大庆油田建材制造安装有限责任公司 | Polyurethane corrosionproof thermal insulating pipeline |
| JP2007136218A (en) * | 2003-10-11 | 2007-06-07 | Aruze Corp | Game machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504104B (en) * | 2008-10-16 | 2013-07-10 | 吴发东 | Mouth compensating method for pipeline corrosion protection layer and integrated mouth compensating machine |
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| CN1597141A (en) | 2005-03-23 |
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