CN214093365U - Heat-insulating anti-corrosion petroleum pipeline - Google Patents
Heat-insulating anti-corrosion petroleum pipeline Download PDFInfo
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- CN214093365U CN214093365U CN202022587545.0U CN202022587545U CN214093365U CN 214093365 U CN214093365 U CN 214093365U CN 202022587545 U CN202022587545 U CN 202022587545U CN 214093365 U CN214093365 U CN 214093365U
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Abstract
The utility model provides a heat preservation anticorrosive petroleum pipeline belongs to the petroleum equipment field. The heat-insulation anticorrosive petroleum pipeline comprises a steel pipe, an anticorrosive coating, an intermediate layer and a protective layer, wherein the steel pipe, the anticorrosive coating, the intermediate layer and the protective layer are coaxially sleeved together; the anticorrosion coating is coated on the outer peripheral wall of the steel pipe; the middle layer comprises a heat-insulating layer, a reinforcing layer and heat-insulating fillers, the heat-insulating layer is made of aerogel felt, the heat-insulating layer is connected to the peripheral wall of the anti-corrosion coating, the reinforcing layer is a steel grid, the steel grid is connected to the peripheral wall of the heat-insulating layer, the heat-insulating fillers are rock wool layers, and the heat-insulating fillers are filled in the steel grid; the protective layer is connected to the outer peripheral wall of the intermediate layer. The steel pipe is coated with the aerogel felt in an adhesion manner, so that the economic benefit and the social benefit of pipeline engineering can be effectively improved.
Description
Technical Field
The disclosure relates to the field of petroleum equipment, in particular to a heat-insulating and corrosion-resistant petroleum pipeline.
Background
After oil production, it must be transported to the appropriate processing department for better utilization, where the oil pipelines for transporting oil are essential equipment. In the oil extraction process, the oil transportation difficulty of an oil pipeline is often caused due to the fact that the wax content of the oil is too high and the oil extraction concentration is high. Particularly in cold seasons, since wax in oil condenses at low temperature, the flow resistance of oil increases greatly, and an insulation layer needs to be added to an oil pipeline to ensure the internal temperature of the pipeline.
In the related art, in order to solve the above problems, an insulation layer is generally wrapped on the pipe, and the insulation layer is mainly made of an organic insulation material, such as foamed polyurethane.
However, the foamed polyurethane has strong hydrophilicity and can corrode petroleum pipelines after absorbing water, so that the service life of the petroleum pipelines is influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a heat-insulating and corrosion-preventing petroleum pipeline, which can improve the corrosion resistance, the water permeability resistance and the deformation resistance of an outer protective layer of the petroleum pipeline, and provides more diversified choices for corrosion prevention and heat insulation of a directly-buried pipeline. The technical scheme is as follows:
the embodiment of the disclosure provides a heat-insulating anticorrosion petroleum pipeline, which comprises a steel pipe, an anticorrosion coating, an intermediate layer and a protective layer, wherein the steel pipe, the anticorrosion coating, the intermediate layer and the protective layer are coaxially sleeved together;
the anticorrosion coating is coated on the outer peripheral wall of the steel pipe;
the middle layer comprises a heat insulation layer, a reinforcing layer and heat insulation fillers, the heat insulation layer is made of aerogel felt, the heat insulation layer is connected to the peripheral wall of the anti-corrosion coating, the reinforcing layer is a steel grid, the steel grid is connected to the peripheral wall of the heat insulation layer, the heat insulation fillers are rock wool layers, and the heat insulation fillers are filled in the steel grid;
the protective layer is connected to the outer peripheral wall of the intermediate layer.
In another implementation manner of the present disclosure, the middle layer further includes a buffer layer, the buffer layer is made of foamed polyurethane, and an inner surface of the buffer layer is connected to an outer surface of the insulation layer.
In another implementation manner of the present disclosure, the middle layer further includes a water-resisting layer, the water-resisting layer is a cement-based waterproof layer, and an inner surface of the water-resisting layer is connected to an outer surface of the heat-insulating filler.
In another implementation manner of the present disclosure, the intermediate layer further includes a pressure resistant layer, the pressure resistant layer is a rubber layer, and an inner surface of the pressure resistant layer is connected to an outer surface of the water barrier layer.
In yet another implementation of the present disclosure, the protective layer includes a glass fiber reinforced plastic layer and a steel wire layer;
the glass fiber reinforced plastic layer is connected to the outer surface of the pressure resistant layer, and the glass fiber reinforced plastic layer wraps the outer surface of the glass fiber reinforced plastic layer.
In yet another implementation of the present disclosure, the glass fiber reinforced plastic layer has a thickness of 5mm to 8 mm.
In yet another implementation of the present disclosure, the insulating layer has a thickness of 5mm to 10 mm.
In yet another implementation of the present disclosure, the corrosion resistant coating is an epoxy primer.
In yet another implementation of the present disclosure, the aerogel blanket has a thermal conductivity of less than 0.03W/(m · K).
In yet another implementation of the present disclosure, the corrosion protection coating has a thickness of 300 μm to 500 μm.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
when the heat-insulating and corrosion-preventing petroleum pipeline provided by the embodiment of the disclosure is used as a buried pipeline, the heat-insulating and corrosion-preventing petroleum pipeline comprises a steel pipe, a corrosion-preventing coating, an intermediate layer and a protective layer, so that the pipeline can be ensured to have an excellent corrosion-preventing effect through the corrosion-preventing coating. The intermediate layer can prevent the pipeline from dissipating heat, thereby preserving heat. Meanwhile, the middle layer can provide good supporting and buffering functions for the protective layer, and the protective layer can reduce damage to the interior of the pipeline caused by mechanical collision or artificial damage in the construction process and prevent underground water from immersing.
Moreover, the intermediate layer in the heat-preservation and corrosion-prevention petroleum pipeline is a flexible heat-preservation felt which is formed by selecting aerogel felt as a heat-preservation layer and nano silica aerogel as a main body material and compounding the aerogel felt with glass fiber cotton or pre-oxidized fiber felt through a special process, the heat conductivity coefficient is extremely low, so that the heat preservation of the pipeline can be effectively realized, and meanwhile, the aerogel felt has excellent hydrophobic property and can effectively prevent underground water from further permeating into the pipeline so as to protect a corrosion-prevention coating. In addition, the anti-corrosion coating and the heat-insulating layer are chemically bonded together, so that the anti-corrosion coating and the aerogel felt can be effectively bonded together, and the anti-corrosion coating and the aerogel felt are tightly bonded together. And, this intermediate level still includes enhancement layer and heat preservation filler, so can carry out reasonable protection to the aerogel felt through the enhancement layer, and in addition, the rock wool layer is chooseed for use to the heat preservation filler, uses the aerogel felt and rock wool layer simultaneously, can protect the aerogel felt through the rock wool layer, can use through the cooperation of the two again, the effectual heat preservation effect that improves the pipeline.
The heat-insulating and corrosion-preventing petroleum pipeline provided by the embodiment of the disclosure has the advantages of simple structure, convenience in manufacturing and good overall heat-insulating effect, and can achieve the purposes of saving energy, reducing consumption and reducing corrosion.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat-insulating and corrosion-preventing petroleum pipeline provided by an embodiment of the disclosure.
The symbols in the drawings represent the following meanings:
1. a steel pipe;
2. an anti-corrosion coating;
3. an intermediate layer; 31. a heat-insulating layer; 32. a reinforcing layer; 33. a heat-insulating filler; 34. a buffer layer; 35. a water barrier layer; 36. a pressure resistant layer;
4. a protective layer; 41. a glass fiber reinforced plastic layer; 42. and a steel wire layer.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The embodiment of the disclosure provides a heat-insulating anticorrosion petroleum pipeline, as shown in fig. 1, the heat-insulating anticorrosion petroleum pipeline comprises a steel pipe 1, an anticorrosion coating 2, an intermediate layer 3 and a protective layer 4, wherein the steel pipe 1, the anticorrosion coating 2, the intermediate layer 3 and the protective layer 4 are coaxially sleeved together. The anticorrosive coating 2 is coated on the outer peripheral wall of the steel pipe 1. Intermediate level 3 includes heat preservation 31, enhancement layer 32 and heat preservation filler 33, and heat preservation 31 is the aerogel felt, and heat preservation 31 is connected at anticorrosive coating 2's periphery wall, and enhancement layer 32 is steel grid, and steel grid connects the periphery wall at heat preservation 31, and heat preservation filler 33 is the rock wool layer, and heat preservation filler 33 fills in steel grid. The protective layer 4 is attached to the outer peripheral wall of the intermediate layer 3.
When using the anticorrosive petroleum pipeline that keeps warm that this disclosed embodiment provided as buried pipeline, because this anticorrosive pipeline that keeps warm includes steel pipe 1, anticorrosive coating 2, intermediate level 3 and protective layer 4, so can guarantee that this pipeline has excellent anticorrosive effect through anticorrosive coating 2, can make this pipeline avoid the heat to scatter and disappear through intermediate level 3, and then keep warm, intermediate level 3 also can provide fine support and cushioning effect for protective layer 4 simultaneously, and protective layer 4 can alleviate the mechanical collision or the artificial damage that causes the pipeline inside in the work progress, and prevent the infiltration of groundwater.
Moreover, the intermediate layer 3 in the heat-insulating and corrosion-resistant pipeline is a flexible heat-insulating felt which is formed by selecting aerogel felt as the heat-insulating layer 31 and is made of nano silicon dioxide aerogel as a main body material and compounding the aerogel felt with glass fiber cotton or pre-oxidized fiber felt through a special process, and the heat conductivity coefficient is extremely low, so that the pipeline can be effectively insulated, meanwhile, the aerogel felt has excellent hydrophobic property, and can also effectively prevent underground water from further permeating into the pipeline, so that the corrosion-resistant coating 2 is protected. In addition, the anti-corrosion coating 2 and the heat preservation layer 31 are chemically bonded together, so that the anti-corrosion coating 2 and the aerogel felt can be effectively bonded together, and the anti-corrosion coating 2 and the aerogel felt are tightly bonded together. And, simultaneously, this intermediate level 3 still includes enhancement layer 32 and heat preservation filler 33, so can carry out reasonable protection to the aerogel felt through enhancement layer 32, and in addition, rock wool layer is chooseed for use to heat preservation filler 33, uses the aerogel felt simultaneously with the rock wool layer, can protect the aerogel felt through the rock wool layer, can use through the cooperation of the two again, the effectual heat preservation effect that improves the pipeline.
The heat-insulating and corrosion-preventing petroleum pipeline provided by the embodiment of the disclosure has the advantages of simple structure, convenience in manufacturing and good overall heat-insulating effect, and can achieve the purposes of saving energy, reducing consumption and reducing corrosion.
Optionally, the corrosion protection coating 2 is an epoxy primer.
In above-mentioned implementation, spraying the epoxy priming paint on the periphery wall of steel pipe 1, can coating the surface of the periphery wall of steel pipe 1 by simple and convenient, prevent that steel pipe 1 surface from rusty and corroding, that is to say, the epoxy priming paint can effectively protect the surface of steel pipe 1.
Optionally, the epoxy primer is an epoxy primer resistant to high temperatures of 150 ℃.
In above-mentioned implementation, through setting up the epoxy primer to above temperature, can guarantee that epoxy primer can be high temperature resistant in use, can not influence its anticorrosive effect of bonding because of high temperature.
Illustratively, the coating thickness of the anticorrosive coating 2 is 300 μm to 500 μm.
In above-mentioned implementation, set up anticorrosive coating 2's thickness to above scope, can effectively protect steel pipe 1 on the one hand, on the other hand can effectively bond with intermediate level 3 again, finally satisfies this heat preservation anticorrosive pipeline's user demand.
Illustratively, after the treatment of the outer peripheral wall of the steel pipe 1 is completed, and after the surface treatment of the outer peripheral wall of the steel pipe 1 is completed, the steel pipe 1 is preheated to 80 ℃, and a layer of 150 ℃ high temperature resistant epoxy primer having a thickness of about 400 μm is applied to the surface of the outer peripheral wall of the steel pipe 1 by spraying or manual brushing.
The middle layer 3 further includes a buffer layer 34, the buffer layer 34 is made of foamed polyurethane, and the inner surface of the buffer layer 34 is connected to the outer surface of the insulating layer 31.
In the above implementation, the buffer layer 34 can further protect the insulation layer 31, so that the insulation layer 31 is not damaged due to accidental deformation of the pipe.
Illustratively, the middle layer 3 further includes a water-blocking layer 35, the water-blocking layer 35 is a cement-based waterproof layer, and an inner surface of the water-blocking layer 35 is connected to an outer surface of the thermal insulation filler 33.
In the above implementation, the water barrier 35 is used to prevent groundwater from entering the thermal insulation filler 33, and the thermal insulation effect is affected.
Illustratively, the middle layer 3 further comprises a compression resistant layer 36, the compression resistant layer 36 is a rubber layer, and the inner surface of the compression resistant layer 36 is connected to the outer surface of the water barrier layer 35.
In the above implementation, the pressure resistant layer 36 is used to protect the thermal insulation filler 33, so that the thermal insulation filler 33 will not affect the use effect of the pipeline due to accidental deformation.
Optionally, the thermal conductivity of the aerogel felt used for the insulating layer 31 is lower than 0.03W/(m · K).
In the above implementation, by setting the thermal conductivity of the aerogel blanket in the pipe to be lower than 0.03W/(m · K), it can be ensured that the aerogel blanket has a low thermal conductivity, so that the inside of the steel pipe 1 can be insulated more effectively, further ensuring that the temperature inside the steel pipe 1 does not decrease rapidly following the use environment outside thereof.
Optionally, the thickness of the insulating layer 31 is between 5mm and 10 mm.
In the above implementation, the thickness of the insulating layer 31 is set to the above range, on the one hand, so that the aerogel felt can have a better heat insulation effect. On the other hand, the pipe is not too thick for pursuing the heat insulation effect, so that the whole outer diameter of the pipe is too large to influence the use effect.
Illustratively, after the epoxy primer is coated on the outer peripheral wall of the steel pipe 1 and before the outer surface of the epoxy primer is dried, the aerogel blanket is directly wrapped on the epoxy primer, and then the epoxy primer can form effective bonding with the aerogel blanket, so that the aerogel blanket can be fixed on the epoxy primer.
Optionally, the protective layer 4 comprises a glass fiber reinforced plastic layer 41 and a steel wire layer 42; the glass fiber reinforced plastic layer 41 is connected to the outer surface of the compression-resistant layer 36, and the steel wire layer 42 is wrapped on the outer surface of the glass fiber reinforced plastic layer 41.
In the above implementation, the glass fiber reinforced plastic layer 41 can further protect the intermediate layer 3, and simultaneously can reduce the damage to the internal structure of the pipeline caused by mechanical collision or artificial damage in the construction process, and can prevent the groundwater from immersing. The steel wire layer 42 can further contribute to the strength of the protective layer 4.
Illustratively, the glass fiber reinforced plastic layer 41 is formed by glass fiber cloth, and the glass fiber cloth is bonded on the intermediate layer 3 through unsaturated resin and curing agent.
In the above implementation, the glass cloth, i.e., the glass fiber, may further protect the intermediate layer 3. The unsaturated resin and the curing agent are configured to firmly adhere the glass cloth to the intermediate layer 3, so that the glass cloth is prevented from being separated from the intermediate layer 3.
Optionally, the curing agent is a vinyl ester resin system.
In the above implementation, since the vinyl resin is a highly corrosion-resistant resin which is internationally recognized and can be rapidly cured in use, that is, the service strength can be rapidly obtained, and the polymer having high corrosion resistance can be obtained, the vinyl resin system is used as the curing agent, so that the unsaturated resin and the curing agent glass cloth can be rapidly and firmly bonded with the intermediate layer 3 in the unsaturated resin and the curing agent, and the unsaturated resin and the curing agent are prevented from being separated.
Alternatively, the glass cloth may be 300mm wide by 0.4mm thick.
In the above implementation, the glass fiber cloth of the above specification is selected for convenient operation, so that the glass fiber cloth can be rapidly wrapped on the intermediate layer 3.
Optionally, the thickness of the glass fiber reinforced plastic layer 41 is between 5mm and 8 mm.
In the above implementation manner, the thickness of the glass fiber reinforced plastic layer 41 is set to the above range, so that the protective layer 4 can reach a certain strength, the protective layer 4 can protect the intermediate layer 3 strongly, and the protective layer 4 can have a good protective effect.
Illustratively, the glass fiber reinforced plastic layer 41 may be formed by coating a glass fiber cloth 300mm wide and 0.4mm thick with an unsaturated resin and a curing agent simultaneously by hand or by a glass fiber reinforced plastic winding machine, and winding the glass fiber cloth uniformly on the outer layer of the intermediate layer 3, thereby finally forming the glass fiber reinforced plastic outer sheath.
The working mode of the heat-insulating and corrosion-preventing petroleum pipeline provided by the embodiment of the disclosure is briefly introduced as follows:
firstly, after the surface treatment of the outer peripheral wall of the steel pipe 1 is finished, preheating the steel pipe 1 to 80 ℃;
then, a layer of epoxy primer with the thickness of about 400 microns and high temperature resistance of 150 ℃ is coated on the surface of the outer peripheral wall of the steel pipe 1 by using a spraying or manual brushing mode to form an anti-corrosion coating 2, and the aerogel felt pair is wrapped on the epoxy primer before the surface of the epoxy primer is air-dried, so that the epoxy primer and the aerogel felt are effectively bonded.
Then, after the epoxy primer and the aerogel felt are effectively bonded, the buffer layer 34, the reinforcing layer 32, the heat-insulating filler 33, the water-resisting layer 35 and the pressure-resisting layer 36 are sequentially wrapped on the steel pipe 1, then glass fiber cloth with the width of 300mm and the thickness of 0.4mm is coated with unsaturated resin and a curing agent synchronously by using a manual or glass fiber reinforced plastic winding machine and is uniformly wound on the steel pipe 1, so that a glass fiber reinforced plastic outer protective layer is finally formed, and the steel wire layer 42 is wrapped on the outermost surface of the steel pipe 1.
The heat-preservation and corrosion-prevention petroleum pipeline provided by the embodiment of the disclosure is provided with a corrosion-prevention coating 2, a heat-preservation layer 31 formed by aerogel felts and a protection layer 4 formed by glass fiber reinforced plastics. The anticorrosion coating 2 is made of epoxy resin, so that the anticorrosion coating has certain bonding capacity, the anticorrosion coating 2 can be effectively bonded with the aerogel felt, and the conventional mode of fixing the aerogel felt in a bundling mode is replaced. The middle aerogel felt is a flexible heat-preservation felt which is formed by compounding nano silicon dioxide aerogel serving as a main body material and glass fiber cotton or a pre-oxidized fiber felt through a special process, is a known heat-insulation material with the lowest heat conductivity coefficient at present, has a heat-insulation effect 2-5 times that of a traditional heat-insulation material, and is longer in service life. The aerogel felt has integral hydrophobicity, effectively prevents water from entering a pipeline, and avoids the corrosion of the pipeline. Aerogel blankets are lightweight, are easily cut to fit the size of the pipeline, and require less time and labor to install. Meanwhile, the material is non-toxic and harmless, and cannot generate adverse effects on the surrounding environment. The aerogel felt also provides good supporting and buffering effects for the protective layer 4 formed by the glass fiber reinforced plastics, and prevents the glass fiber reinforced plastics protective layer 4 from being damaged due to soil stress or rocks. In addition, the aerogel felt has excellent hydrophobic property, so that further permeation of underground water can be prevented. And finally, the protective layer 4 can reduce the damage to the inside of the pipeline anticorrosion and thermal insulation structure caused by mechanical collision or artificial damage in the construction process and prevent the immersion of underground water. Therefore, the overall heat preservation effect of the heat preservation and corrosion prevention pipeline provided by the embodiment of the disclosure can achieve the purposes of saving energy, reducing consumption and reducing corrosion.
In conclusion, the heat-preservation and corrosion-prevention petroleum pipeline provided by the embodiment of the disclosure introduces the advantages of the aerogel felt into the buried pipeline by improving the corrosion-prevention and heat-preservation method of the buried steel pipeline, so as to manufacture the aerogel felt corrosion-prevention and heat-preservation buried prefabricated pipe, provide technical support for long-term efficient and safe operation of the pipeline, and effectively improve the economic benefit and social benefit of pipeline engineering.
The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.
Claims (10)
1. The heat-insulation and corrosion-prevention petroleum pipeline is characterized in that the heat-insulation and corrosion-prevention oil pipe comprises a steel pipe (1), a corrosion-prevention coating (2), an intermediate layer (3) and a protective layer (4), wherein the steel pipe (1), the corrosion-prevention coating (2), the intermediate layer (3) and the protective layer (4) are coaxially sleeved together;
the anti-corrosion coating (2) is coated on the outer peripheral wall of the steel pipe (1);
the middle layer (3) comprises a heat insulation layer (31), a reinforcing layer (32) and heat insulation fillers (33), the heat insulation layer (31) is made of aerogel felt, the heat insulation layer (31) is connected to the peripheral wall of the anti-corrosion coating (2), the reinforcing layer (32) is made of steel grids, the steel grids are connected to the peripheral wall of the heat insulation layer (31), the heat insulation fillers (33) are rock wool layers, and the heat insulation fillers (33) are filled in the reinforcing layer (32);
the protective layer (4) is connected to the outer peripheral wall of the intermediate layer (3).
2. An insulated and corrosion-resistant petroleum pipeline according to claim 1, wherein the intermediate layer (3) further comprises a buffer layer (34), the buffer layer (34) is foamed polyurethane, and the inner surface of the buffer layer (34) is connected with the outer surface of the insulating layer (31).
3. The insulated and anticorrosive petroleum pipeline according to claim 1, wherein the middle layer (3) further comprises a water-barrier layer (35), the water-barrier layer (35) is a cement-based waterproof layer, and the inner surface of the water-barrier layer (35) is connected to the outer surface of the insulating filler (33).
4. The insulated and anticorrosive petroleum pipeline according to claim 3, characterized in that the middle layer (3) further comprises a pressure resistant layer (36), the pressure resistant layer (36) is a rubber layer, and the inner surface of the pressure resistant layer (36) is connected to the outer surface of the water-resisting layer (35).
5. An insulated and corrosion-resistant petroleum pipeline according to claim 4, characterized in that said protective layer (4) comprises a glass fiber reinforced plastic layer (41) and a steel wire layer (42);
the glass fiber reinforced plastic layer (41) is connected to the outer surface of the pressure resistant layer (36), and the steel wire layer (42) wraps the outer surface of the glass fiber reinforced plastic layer (41).
6. An insulated and corrosion-resistant petroleum pipeline according to claim 5, wherein the thickness of the glass fiber reinforced plastic layer (41) is 5mm-8 mm.
7. An insulated and corrosion-resistant petroleum pipeline according to any of claims 1 to 6, characterized in that the thickness of the insulating layer (31) is 5mm to 10 mm.
8. An insulated and anticorrosive petroleum pipeline according to any of claims 1 to 6, characterized in that the anticorrosive coating (2) is an epoxy primer.
9. An insulated and corrosion-resistant petroleum pipeline according to any one of claims 1 to 6, wherein the aerogel blanket has a thermal conductivity of less than 0.03W/(m-K).
10. An insulated and corrosion-resistant petroleum pipeline according to any one of claims 1 to 6, characterized in that the thickness of the corrosion-resistant coating (2) is 300 μm to 500 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022587545.0U CN214093365U (en) | 2020-11-10 | 2020-11-10 | Heat-insulating anti-corrosion petroleum pipeline |
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| CN202022587545.0U CN214093365U (en) | 2020-11-10 | 2020-11-10 | Heat-insulating anti-corrosion petroleum pipeline |
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