CN102620065A - Anti-corrosion counterweight pipe capable of preventing counterweight layer from shedding and method for manufacturing anti-corrosion counterweight pipe - Google Patents
Anti-corrosion counterweight pipe capable of preventing counterweight layer from shedding and method for manufacturing anti-corrosion counterweight pipe Download PDFInfo
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- CN102620065A CN102620065A CN2012101038420A CN201210103842A CN102620065A CN 102620065 A CN102620065 A CN 102620065A CN 2012101038420 A CN2012101038420 A CN 2012101038420A CN 201210103842 A CN201210103842 A CN 201210103842A CN 102620065 A CN102620065 A CN 102620065A
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- cold winding
- winding band
- counterweight
- anticorrosion
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Abstract
The invention discloses an anti-corrosion counterweight pipe capable of preventing a counterweight layer from shedding, which comprises a steel pipe. Double sintered epoxy power layers, an adhesive layer, a cold winding strip layer and a concrete counterweight layer are arranged on the outer surface of the steel pipe layer by layer from inside to outside, cold winding strips forming the cold winding strip layer are spirally wound onto the adhesive layer, and each two adjacent circles of the cold winding strips are mutually overlapped. The invention further discloses a method for manufacturing the anti-corrosion counterweight pipe. Shear strength of the concrete counterweight layer sprayed on the outer surface of the pipe and the double sintered epoxy power layers is improved, attachment capacity of the concrete counterweight layer is improved, the concrete counterweight layer can be effectively and reliably prevented from shedding from the steel pipe, and stability of the concrete counterweight layer on the steel pipe is enhanced. Further, the double sintered epoxy power layers can be effectively protected by means of the cold winding strips and protected from impact and damage during spraying of concrete. The anti-corrosion counterweight pipe is high in compression strength, reasonable in manufacturing process and high in controllability.
Description
Technical field
The present invention relates to a kind of anticorrosion counterweight pipe, particularly relate to a kind of anticorrosion counterweight pipe that can prevent the weight coating slippage and preparation method thereof.
Background technique
Along with the exploitation of sea-bottom oil-gas resource, the application of submarine pipeline more and more widely, it is the escape way that ensures the offshore oil and gas safe operation.For guaranteeing the stability of submarine pipeline, submarine pipeline generally all designs the concrete weight coating structure, and negative buoyancy is provided on the one hand, on the other hand the sea pipe is carried out mechanical protection.
The submarine pipeline structure generally is designed to three strata alkene anticorrosive coats and adds concrete weighted coating, and it comprises by steel pipe and is successively set on monocycle oxygen anticorrosive coat, adhesive layer, polyethylene layer, antiskid particles layer and the concrete weighted coating on the outer surface of steel tube from the inside to the outside.The dual-layer epoxy powder coating is because of antiseptic property is excellent, the low first-selected coating that becomes a lot of submerged pipeline designs of cost.But there are many defectives in the concrete weight coating of dual-layer epoxy powder coating:
1) shear strength between concrete weighted coating and epoxy layer is lower, and the middle antiskid particles layer that sprays can not play effective anti-slip effect, is difficult to engineering demands.
2) the antiskid particles layer is had relatively high expectations to the operant level that applies personnel in coating process, and process parameter is restive, and construction quality is difficult to ensure.
3) concrete adopts spraying coating process to accomplish, and the antiskid particles layer can not play effective mechanical protection effect to the epoxy anticorrosion layer, causes the breakage of dual-layer epoxy powder coating easily.
The existence of above-mentioned these defectives becomes the key factor that restricts the extensive use of dual-layer epoxy powder coating counterweight pipe.
Summary of the invention
The present invention provides a kind of anticorrosion counterweight pipe that can prevent the weight coating slippage and preparation method thereof for solving the technical problem that exists in the known technology.
The technological scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of anticorrosion counterweight pipe that can prevent the weight coating slippage; Comprise steel pipe; On said outer surface of steel tube, successively be provided with double-deck clinkery epoxy powder layer, gluing layer, Cold winding band layer and concrete weighted coating from the inside to the outside; The Cold winding band curl that forms said Cold winding band layer is wrapped on the said gluing layer, and the said Cold winding band of two adjacent rings overlaps each other.
The Cold winding band that forms said Cold winding band layer is the anticorrosion Cold winding band of polypropylene reinforcing fiber.
The adhesive that forms said gluing layer is an asphalt modification neoprene adhesive.
Another technological scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of method of making the above-mentioned anticorrosion counterweight pipe that can prevent the weight coating slippage may further comprise the steps:
1) outer surface at steel pipe applies double-deck clinkery epoxy powder layer, carries out cleaning surfaces and drying process to applying the double-deck clinkery epoxy powder layer of accomplishing;
2) on double-deck clinkery epoxy powder layer, evenly be coated with adhesive, on double-deck clinkery epoxy powder layer, form the gluing layer;
3) treat gluing laminar surface drying after, twine Cold winding band at gluing laminar surface curl, form the Cold winding band layer, and the said Cold winding band of two adjacent rings overlaps each other;
4) the Cold winding band layer is carried out the surface and flatten processing;
5) on the Cold winding band layer, form concrete weighted coating.
In said step 2) in, the consumption of adhesive is 10～14m
2/ L.
In said step 3), the surface drying time of gluing layer is 5～10 minutes.
In said step 3), the lap width of Cold winding band is 45%～55% of a said Cold winding band width.
In said step 3), the top of Cold winding band and tail end immerse before winding in the adhesive respectively, immerse length and are not less than 20mm.
Advantage and good effect that the present invention has are: the whole continuous anti-slip structure that forms through the spiral Cold winding band that outside being coated with the double-deck clinkery epoxy powder layer of adhesive, twines; Improved spraying concrete weighted coating and the shear strength of double-deck clinkery epoxy powder layer on its outer surface; Strengthened the adhesion of concrete weighted coating; Can prevent concrete weighted coating slippage from the steel pipe effectively reliably, strengthen the steadiness of concrete weighted coating on steel pipe.And Cold winding band can be protected double-deck clinkery epoxy powder layer effectively, prevents the double-deck clinkery epoxy powder layer of concrete spraying impact failure, and the compressive strength of this anticorrosion counterweight pipe is high, and preparation process is reasonable, and controllability is good.
Description of drawings
Fig. 1 is the structural representation of the anticorrosion counterweight pipe of the present invention.
Among the figure: 1, steel pipe, 2, double-deck clinkery epoxy powder layer, 3, the gluing layer, 4, the Cold winding band layer, 5, concrete weighted coating.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, the following examples of giving an example now, and conjunction with figs. specifies as follows:
See also Fig. 1; A kind of anticorrosion counterweight pipe that can prevent the weight coating slippage; Comprise steel pipe 1; On said steel pipe 1 outer surface, successively be provided with double-deck clinkery epoxy powder layer 2, gluing layer 3, Cold winding band layer 4 and concrete weighted coating 5 from the inside to the outside, the Cold winding band curl that forms said Cold winding band layer 4 is wrapped on the said gluing layer 4, and the said Cold winding band of two adjacent rings overlaps each other.
The above-mentioned making method that can prevent the anticorrosion counterweight pipe of weight coating slippage may further comprise the steps:
1) outer surface at steel pipe applies double-deck clinkery epoxy powder layer, carries out cleaning surfaces and drying process to applying the double-deck clinkery epoxy powder layer of accomplishing; If double-deck clinkery epoxy powder layer exists such as the defective of hole, pit etc., should repair the defective that double-deck clinkery epoxy powder layer exists.Double-deck clinkery epoxy powder layer should clean, not have greasy dirt, free from dust or other pollutants.
2) use clean hairbrush, roller or other mechanical means, on double-deck clinkery epoxy powder layer, evenly be coated with adhesive, on double-deck clinkery epoxy powder layer, form the gluing layer.Defectives such as holiday, grumeleuse or sagging can not appear in adhesive, and its consumption is: 10～14m
2/ L.
3) behind the coating adhesive 5～10 minutes, treat gluing laminar surface drying after, twine Cold winding band at gluing laminar surface curl, form the Cold winding band layer, and the said Cold winding band of two adjacent rings overlaps each other.
The lap width of Cold winding band is preferably 45%～55% of said Cold winding band width, and during winding, Cold winding band must be strained, flatten, and makes surfacing, and contact is no bubble closely.The top of Cold winding band and tail end preferably immerse before winding in the adhesive respectively, immerse length and preferably are not less than 20mm.Twine again after being stained with adhesive, can further strengthen the steadiness of Cold winding band.
For Cold winding band is twined evenly; Can Cold winding band be placed on the whirligig; And regulate rotational speed, then, along with the rotation of anticorrosion counterweight pipe is axially twined along it; The anti-slip structure that is formed jointly by gluing layer and Cold winding band layer that is obtained after twining can play anti-slip effect to concrete weighted coating, double-deck clinkery epoxy powder layer is played the effect of mechanical protection.
4) the Cold winding band layer is carried out the surface and flatten processing;
5) spraying forms concrete weighted coating on the Cold winding band layer.
The embodiment 1 of above-mentioned making method:
1) outer surface at steel pipe applies double-deck clinkery epoxy powder layer, carries out cleaning surfaces and drying process to applying the double-deck clinkery epoxy powder layer of accomplishing; If double-deck clinkery epoxy powder layer exists such as the defective of hole, pit etc., should repair the defective that double-deck clinkery epoxy powder layer exists.Double-deck clinkery epoxy powder layer should clean, not have greasy dirt, free from dust or other pollutants.
2) use clean hairbrush, roller or other mechanical means, on double-deck clinkery epoxy powder layer, evenly be coated with adhesive, on double-deck clinkery epoxy powder layer, form the gluing layer.Defectives such as holiday, grumeleuse or sagging can not appear in adhesive, and its consumption is: 10m
2/ L.
3) behind the coating adhesive 5 minutes, the gluing laminar surface was dry, twines Cold winding band at gluing laminar surface curl, form the Cold winding band layer, and the said Cold winding band of two adjacent rings overlaps each other.
The lap width of Cold winding band is 45% of a said Cold winding band width, and during winding, Cold winding band must be strained, flatten, and makes surfacing, and contact is no bubble closely.The top of Cold winding band and tail end preferably immerse in the adhesive before winding respectively, and immersion length is 20mm.Twine again after being stained with adhesive, can further strengthen the steadiness of Cold winding band.
For Cold winding band is twined evenly; Can Cold winding band be placed on the whirligig; And regulate rotational speed, then, along with the rotation of anticorrosion counterweight pipe is axially twined along it; The anti-slip structure that is formed jointly by gluing layer and Cold winding band layer that is obtained after twining can play anti-slip effect to concrete weighted coating, double-deck clinkery epoxy powder layer is played the effect of mechanical protection.
4) the Cold winding band layer is carried out the surface and flatten processing;
5) on the Cold winding band layer, form concrete weighted coating.
The anticorrosion counterweight pipe that adopts the foregoing description 1 described method to make; Its anti-slip structural continuity is good; Overall tightness is good, and the affixed property of concrete weighted coating and Cold winding band layer and the affixed property of Cold winding band layer and double-deck clinkery epoxy powder layer are good, and adhesion is big.The adhesion of Cold winding band and double-deck clinkery epoxy powder layer is 0.12Mpa, and the anti-slip power value of concrete weighted coating and double-deck clinkery epoxy powder interlayer can reach 310KN, and this structure can play anti-slip effectively effect to the anticorrosion counterweight pipe in seabed.Adopt the anticorrosion counterweight pipe compressive strength of this anti-slip structure high, shock resistance is good.
The embodiment 2 of above-mentioned making method:
Be with embodiment 1 difference: 1) consumption of adhesive is: 14m
2/ L; 2) be 10 minutes the time of drying of adhesive; 3) lap width of Cold winding band is 50% of a said Cold winding band width; 4) length in the top of Cold winding band and the tail end immersion adhesive is 30mm.Except that above-mentioned difference, all the other methods are all identical with embodiment 1.
The anticorrosion counterweight pipe that adopts the foregoing description 2 described methods to make; Its anti-slip structural continuity is good; Overall tightness is good, and the affixed property of concrete weighted coating and Cold winding band layer and the affixed property of Cold winding band layer and double-deck clinkery epoxy powder layer are good, and adhesion is big.The adhesion of Cold winding band and double-deck clinkery epoxy powder layer is 0.15Mpa, and the anti-slip power value of concrete weighted coating and double-deck clinkery epoxy powder interlayer can reach 350KN, and this structure can play anti-slip effectively effect to the anticorrosion counterweight pipe in seabed.Adopt the anticorrosion counterweight pipe compressive strength of this anti-slip structure high, shock resistance is good.
The embodiment 3 of above-mentioned making method:
Be with embodiment 1 difference: 1) consumption of adhesive is: 12m
2/ L; 2) be 8 minutes the time of drying of adhesive; 3) lap width of Cold winding band is 55% of a said Cold winding band width; 4) length in the top of Cold winding band and the tail end immersion adhesive is 25mm.Except that above-mentioned difference, all the other methods are all identical with embodiment 1.
The anticorrosion counterweight pipe that adopts the foregoing description 3 described methods to make; Its anti-slip structural continuity is good; Overall tightness is good, and the affixed property of concrete weighted coating and Cold winding band layer and the affixed property of Cold winding band layer and double-deck clinkery epoxy powder layer are good, and adhesion is big.The adhesion of Cold winding band and double-deck clinkery epoxy powder layer is 0.2Mpa, and the anti-slip power value of concrete weighted coating and double-deck clinkery epoxy powder interlayer can reach 360KN, and this structure can play anti-slip effectively effect to the anticorrosion counterweight pipe in seabed.Adopt the anticorrosion counterweight pipe compressive strength of this anti-slip structure high, shock resistance is good.
The Cold winding band that forms above-mentioned Cold winding band layer preferably adopts the commercially available anticorrosion Cold winding band of polypropylene reinforcing fiber.The adhesive that forms above-mentioned gluing layer preferably adopts commercially available asphalt modification neoprene adhesive.
Although combine accompanying drawing that the preferred embodiments of the present invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (8)
1. anticorrosion counterweight pipe that can prevent the weight coating slippage; Comprise steel pipe; It is characterized in that; On said outer surface of steel tube, successively be provided with double-deck clinkery epoxy powder layer, gluing layer, Cold winding band layer and concrete weighted coating from the inside to the outside, the Cold winding band curl that forms said Cold winding band layer is wrapped on the said gluing layer, and the said Cold winding band of two adjacent rings overlaps each other.
2. the anticorrosion counterweight pipe that can prevent the weight coating slippage according to claim 1 is characterized in that the Cold winding band that forms said Cold winding band layer is the anticorrosion Cold winding band of polypropylene reinforcing fiber.
3. the anticorrosion counterweight pipe that can prevent the weight coating slippage according to claim 1 is characterized in that the adhesive that forms said gluing layer is an asphalt modification neoprene adhesive.
4. making such as any described method that can prevent the anticorrosion counterweight pipe of weight coating slippage of claim 1～3 is characterized in that, may further comprise the steps:
1) outer surface at steel pipe applies double-deck clinkery epoxy powder layer, carries out cleaning surfaces and drying process to applying the double-deck clinkery epoxy powder layer of accomplishing;
2) on double-deck clinkery epoxy powder layer, evenly be coated with adhesive, on double-deck clinkery epoxy powder layer, form the gluing layer;
3) treat gluing laminar surface drying after, twine Cold winding band at gluing laminar surface curl, form the Cold winding band layer, and the said Cold winding band of two adjacent rings overlaps each other;
4) the Cold winding band layer is carried out the surface and flatten processing;
5) on the Cold winding band layer, form concrete weighted coating.
5. anticorrosion counterweight pipe making method according to claim 4 is characterized in that, in said step 2) in, the consumption of adhesive is 10～14m
2/ L.
6. anticorrosion counterweight pipe making method according to claim 4 is characterized in that in said step 3), the surface drying time of gluing layer is 5～10 minutes.
7. anticorrosion counterweight pipe making method according to claim 4 is characterized in that in said step 3), the lap width of Cold winding band is 45%～55% of a said Cold winding band width.
8. anticorrosion counterweight pipe making method according to claim 4 is characterized in that, in said step 3), the top of Cold winding band and tail end immerse before winding in the adhesive respectively, immerse length and are not less than 20mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101038420A CN102620065A (en) | 2012-04-10 | 2012-04-10 | Anti-corrosion counterweight pipe capable of preventing counterweight layer from shedding and method for manufacturing anti-corrosion counterweight pipe |
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|---|---|---|---|
| CN2012101038420A CN102620065A (en) | 2012-04-10 | 2012-04-10 | Anti-corrosion counterweight pipe capable of preventing counterweight layer from shedding and method for manufacturing anti-corrosion counterweight pipe |
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|---|---|
| CN102620065A true CN102620065A (en) | 2012-08-01 |
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| CN2012101038420A Pending CN102620065A (en) | 2012-04-10 | 2012-04-10 | Anti-corrosion counterweight pipe capable of preventing counterweight layer from shedding and method for manufacturing anti-corrosion counterweight pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840395A (en) * | 2012-08-28 | 2012-12-26 | 中国海洋石油总公司 | Dual-layer heat-preserving weight-balancing submarine pipeline |
| CN103511794A (en) * | 2013-10-08 | 2014-01-15 | 番禺珠江钢管（连云港）有限公司 | Process for reserving FBE layer with any length at ends of 3PE/3PP erosion-resistant pipe |
| CN104406012A (en) * | 2014-11-04 | 2015-03-11 | 北京市燃气集团有限责任公司 | Heat insulation structure and heat insulation method of polyethylene gas pipeline |
| CN105333239A (en) * | 2015-12-14 | 2016-02-17 | 宁波科鑫腐蚀控制工程有限公司 | Fused epoxy fiber composite steel pipe and machining method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840395A (en) * | 2012-08-28 | 2012-12-26 | 中国海洋石油总公司 | Dual-layer heat-preserving weight-balancing submarine pipeline |
| CN103511794A (en) * | 2013-10-08 | 2014-01-15 | 番禺珠江钢管（连云港）有限公司 | Process for reserving FBE layer with any length at ends of 3PE/3PP erosion-resistant pipe |
| CN103511794B (en) * | 2013-10-08 | 2015-11-25 | 番禺珠江钢管（连云港）有限公司 | A kind of 3PE/3PP anti-corrosion pipe pipe end retains the technique of any long FBE layer |
| CN104406012A (en) * | 2014-11-04 | 2015-03-11 | 北京市燃气集团有限责任公司 | Heat insulation structure and heat insulation method of polyethylene gas pipeline |
| CN105333239A (en) * | 2015-12-14 | 2016-02-17 | 宁波科鑫腐蚀控制工程有限公司 | Fused epoxy fiber composite steel pipe and machining method thereof |
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Application publication date: 20120801 |