CN104565576A - Pipeline and pipeline with coupling - Google Patents

Pipeline and pipeline with coupling Download PDF

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Publication number
CN104565576A
CN104565576A CN201310499465.1A CN201310499465A CN104565576A CN 104565576 A CN104565576 A CN 104565576A CN 201310499465 A CN201310499465 A CN 201310499465A CN 104565576 A CN104565576 A CN 104565576A
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CN
China
Prior art keywords
pipeline
aerogel
box cupling
heat
insulation layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310499465.1A
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Chinese (zh)
Inventor
邹弋
姚雪容
郑俊鹏
任毅
马蓓蓓
李娟�
罗水源
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
Original Assignee
Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinopec Beijing Research Institute of Chemical Industry, China Petroleum and Chemical Corp filed Critical Sinopec Beijing Research Institute of Chemical Industry
Priority to CN201310499465.1A priority Critical patent/CN104565576A/en
Publication of CN104565576A publication Critical patent/CN104565576A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems

Abstract

The invention provides a pipeline and a pipeline with a coupling. The pipeline comprises an anticorrosion wear-resistant liner (1), an inner pipe (2), a first insulation layer (3), a heat insulation layer (4), a second insulation layer (5), an outer pipe (6) and an outer anticorrosion layer (7) from inside to outside, the first heat insulation layer (3) and the second heat insulation layer (5) are made of same or different materials which are independently heat insulation and preservation powder coating containing aerogel and/or fiber strengthening aerogel fabric. The pipeline and the pipeline with the coupling have the advantages of excellent heat insulation performance, anticorrosion performance and wear resistance.

Description

The pipeline of a kind of pipeline and band box cupling
Technical field
The present invention relates to a kind of pipeline and a kind of pipeline with box cupling.
Background technique
In the process of recovery of subterranean resources, as oil and geothermal resources, pipeline plays vital effect in whole fluid delivery process.Meanwhile, along with country green economy advocated energetically and energy-saving and emission-reduction overall background under, the usage requirement of recovery of subterranean resources to pipeline it is also proposed higher challenge.Wherein, two maximum challenges be insulation and anticorrosion.
For oil extraction, China's crude oil that is produced from oil field is high wax content oil mostly.Research shows, the key influence factor of long-distance pipe wax deposition is temperature.Temperature has the effect of two aspects, on the one hand because the oil temperature at tube wall place is lower than the FCTA temprature of wax, make the nucleus of crystallization crystallization that the wax molecule in oil provides by means of inner tube wall, form immobilising wax deposition layer, and the wax adsorbed further in liquid phase is brilliant, form network structure, operative liquid crude oil is enclosed in wherein; On the other hand, owing to hot oil pipeline cross section closing on the temperature gradient at tube wall place, after the internal face place precipitation that temperature is minimum closes on, the wax molecular concentration of dissolving in this place's solution is just lower than the solution away from internal face place.That separates out due to temperature difference closes on quantity difference, therefore, as long as there is the interval of temperature lower than the FCTA temprature of wax in oil stream, and wherein there is radial symmetry gradient, just there will be the radial concentration gradient of wax molecule in oil stream.The concentration at internal face place is minimum, and towards pipeline center direction, concentration increases gradually.Due to the existence of concentration gradient, will cause wax molecule from tube hub to the radial diffusion of tube wall, create conditions for tube wall continues wax deposition, paraffin crystal is separated out and directly on inner-walls of duct, is formed wax deposition layer.Therefore, the effect of pipe insulation in pipe conveying procedure is very important.
In addition, crude oil high sulfur-bearing, containing acid and sand content all pipeline corrosion resistance and wear resistance are had higher requirement.From the angle of oil extraction pipeline corrosion, high sulfur-bearing, containing acid petroleum resources pipeline can be made to bear distinctive corrosion, such as Wet hydrogen sulfide corrosion, hydrogen sulfide and hcl corrosion, hydrogen sulfide add hydrocyanic acid burn into hydrogen sulfide and add carbonic acid burn into naphthenic acid corrosion, polyacid corrosion etc.And, little hissing is not allowed in the harm of general corrosion or homogeneous corrosion yet, such as stainless steel material is after surface forms passivating film, its corrosion rate can be less than 0.1mm/a, but once passivating film is after active destruction in Acidic Liquid, its corrosion rate can not be less than 0.5mm/a, even will reach more than 2mm/a.High sediment concentration can increase the abrasion condition of pipeline wall, has the effect of adding fuel to the flames to destruction steel surface passivating film.Therefore, while requiring pipeline to have good corrosion, also need pipeline to have higher wear resistance.
Meanwhile, the problem of the most critical existed in the process of geothermal resources is utilized to improve capacity usage ratio exactly.At this moment need reclaimed underground heat energy can value in the circulatory system, consume the energy can value, the utilization of geothermal resources could success at last.And strengthen the thermal insulation property of under ground piping, can the loss of geothermal resources be reduced to greatest extent and improve capacity usage ratio undoubtedly.And the antiseptic property improving pipeline significantly can extend pipeline working life, shorten the time of cost recovery.
Existing insulated tubing generally adopts double-deck concentric tube configuration, and by pipe closed at both ends to ensure good heat-shielding performance.This insulated tubing can reduce steam injection thermal loss, improves the steam quality can injected the degree of depth and inject oil reservoir, reduces the thermal loss in crude oil lifting process.CN101644372A discloses a kind of vacuum composite heat-insulating, this pipeline is vacuum composite pipe structure, comprises inner and outer tubes, it is characterized in that, be provided with the vacuum heat-insulating layer of the independent stainless or carbon steel of at least one deck between the inner and outer pipe sections, utilize vacuum heat-insulating layer finally to realize oil pipe heat insulation.
Concentric tubes structure possesses very excellent heat insulation effect really, but technically also there is higher requirement.First, although the space formed between heat-insulating pipeline inner and outer pipes can ensure heat insulation effect to greatest extent, its Connecting format often adopts box cupling, and box cupling can form heat bridge with tube contacts usually, causes heat losses.Second, in fluid delivery process, in heat-insulating pipeline, pipe forms thermal stress owing to being heated, when especially passing into hot steam in oil recovery process, the temperature difference of inner and outer tubes can reach more than 200 DEG C, so need to carry out the measure eliminating or compensate thermal stress on pipeline configuration.3rd, the insulated space between inner and outer pipes is the effective guarantee ensureing effect of heat insulation, but once outer tube causes breakage due to problems such as installation or corrosion, the effect of insulated space can be made seriously to reduce.And, once sour gas such as hydrogen sulfide invades the corrosion that pipeline also can accelerate pipeline.
In sum, a kind of oil extraction pipeline that can have thermal insulation property, corrosion resistance and wear-resisting property concurrently of exploitation is needed at present badly.
Summary of the invention
The object of the invention is the defect that can not have thermal insulation property, corrosion resistance and wear-resisting property in order to overcome existing oil extraction pipeline concurrently, and provide a kind of and can have the pipeline of excellent thermal insulation property, corrosion resistance and wear-resisting property and a kind of pipeline with box cupling simultaneously concurrently.
The invention provides a kind of pipeline, wherein, described pipeline comprises from inside to outside successively: anticorrosion antiwear liner, interior pipe, the first heat insulation layer, thermal-protective coating, the second heat insulation layer, outer tube and external anti-corrosion layer, and the material forming described first heat insulation layer and the second heat insulation layer is identical or different, and be heat-insulation and heat-preservation powder coating and/or the fibre strengthening aerogel fabric of aerogel-congtg independently of one another.
Present invention also offers a kind of pipeline with box cupling, wherein, the pipeline of described band box cupling comprises at least two above-mentioned pipelines and at least one box cupling.
Pipeline provided by the invention can not only improve effect of heat insulation, but also can solve the structural imperfection of insulated tubing itself.Infer its reason, may be due to: on the one hand, as a rule, existing flow string generally includes stainless steel inner and outer tubes.If using martensite type stainless steel material as inner tube material, its thermal conductivity is generally 26mW/mK, in surface temperature and inner and outer pipes space surface of contact temperature and interior pipe stream temperature very close, easily make gas in space form thermoconvection at high operating temperatures.And pipeline provided by the invention is equipped with the first heat insulation layer and second heat insulation layer of aerogel-congtg between the inner and outer pipe sections, because the heat conductivity factor of aerogel is lower, the construction layer of the aerogel-congtg that 1mm is thick can make surface of contact surface temperature reduce by more than 80%, thus significantly reduces heat transfer temperature difference, eliminates thermoconvection phenomenon.On the other hand, use the heat-insulation and heat-preservation powder coating of aerogel-congtg and/or fibre strengthening aerogel formation of fabrics first heat insulation layer and the second heat insulation layer, do not need to vacuumize process and just there is good heat insulation effect, this is that thermal conductivity owing to eliminating the still air after thermoconvection is about 23mW/mK, can meet the insulation demand of insulated tubing.In addition, because aerogel has higher gap structure usually, can the effective harmful gas such as adsorption of hydrogen sulfide, thus reduce the corrosivity to pipeline.In addition, the existence of anticorrosion antiwear liner and external anti-corrosion layer can not only improve the thermal insulation property of described pipeline further, and described pipeline can also be made to have good corrosion resistance and wear-resisting property.
A preferred embodiment of the invention; when described box cupling comprises bushing pipe, sealing layer, box cupling inner protective layer, box cupling thermal-protective coating and box cupling external protection from inside to outside successively; lining and seal ring is provided with in described sealing layer; namely; when adding box cupling thermal-protective coating between the box cupling inner protective layer and box cupling external protection of existing box cupling; effectively can also avoid the formation of heat bridge between described box cupling and pipeline, thus reduce the loss of heat further, strengthen heat insulation effect.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the cross sectional representation of pipeline provided by the invention;
Fig. 2 is the axial sectional view of the pipeline of band box cupling provided by the invention;
Fig. 3 is the structural representation of supporting structure provided by the invention;
Fig. 4 is the structural representation of flared joint provided by the invention.
Description of reference numerals
1-anticorrosion antiwear liner; Pipe in 2-; 3-first heat insulation layer; 4-thermal-protective coating; 5-second heat insulation layer; 6-outer tube; 7-external anti-corrosion layer; 8-support; 81-support; 82-draw-in groove; 9-supporter; 10-outside thread; 11-box cupling seal ring; 12-box cupling thermal-protective coating; 13-box cupling external protection; 13 '-box cupling inner protective layer; 14-bushing pipe; 15-lining; 16-seal ring; 17-flared joint; 18-antiseptic wearable coat
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
According to the present invention, as shown in Figure 1, described pipeline comprises from inside to outside successively: anticorrosion antiwear liner 1, interior pipe 2, first heat insulation layer 3, thermal-protective coating 4, second heat insulation layer 5, outer tube 6 and external anti-corrosion layer 7, the material forming described first heat insulation layer 3 and the second heat insulation layer 5 is identical or different, and is heat-insulation and heat-preservation powder coating and/or the fibre strengthening aerogel fabric of aerogel-congtg independently of one another.
According to the present invention, the heat-insulation and heat-preservation powder coating of described aerogel-congtg variously can have a powder coating of good heat insulation effect containing aerogel for existing.The thermal conductivity of the heat-insulation and heat-preservation powder coating of described aerogel-congtg is preferably 30-150mW/mK, be more preferably 50-150mW/mK, the raw material sources that can make like this to form described heat-insulation and heat-preservation powder coating are more extensive and make the pipeline comprising the first heat insulation layer 3 and the second heat insulation layer 5 formed by the heat-insulation and heat-preservation powder coating of described aerogel-congtg have good heat insulation effect.
Particularly, the heat-insulation and heat-preservation powder coating of described aerogel-congtg is preferably containing the first aerogel and film-forming polymer resin.The consumption of described first aerogel and film-forming polymer resin can carry out choose reasonable according to actual conditions, as a rule, when the content of described first aerogel is higher, can improve the heat-insulating property of described pipeline, but mechanical strength is lower; And when the content of described first aerogel is lower, the mechanical strength of described pipeline can be improved, but thermal insulation property is poor, therefore, performance synthesis is from every side considered, with the gross weight of the heat-insulation and heat-preservation powder coating of described aerogel-congtg for benchmark, the content of described first aerogel is preferably 1-50 % by weight, is more preferably 5-40 % by weight; The content of described film-forming polymer resin is preferably 50-99 % by weight, is more preferably 60-95 % by weight.
According to the present invention, the kind of described first aerogel can be that the routine of related domain is selected, and such as, can be one or more in aerosil, aluminium sesquioxide aerogel, ZrO_2 aerogel, titania aerogel etc.Preferably, described first aerogel is hydrophobic aerogel, and the pipeline obtained can be made like this to have more excellent decay resistance.More preferably, described first aerogel is porous silica material.
According to the present invention, in order to improve the thermal insulation property of described pipeline further, the particle diameter of described porous silica material is preferably 5 μm-1000 μm, is more preferably 20 μm-100 μm; Thermal conductivity is preferably 12-40mW/mK, is more preferably 12-20mW/mK; Specific surface area is preferably 300-800 meters squared per gram, is more preferably 600-800 meters squared per gram; Bore dia is preferably 10-40nm, is more preferably 20-40nm; Porosity ratio is preferably 90%-98%, is more preferably 95%-98%.In the present invention, described specific surface area can adopt nitrogen adsorption methods to measure.
According to the present invention, in order to more be conducive to the dispersion of described porous silica material in film-forming polymer resin, preferably, described porous silica material is the improved silica porous material obtained with surface modifying agent.More preferably, described surface modifier is gamma-aminopropyl-triethoxy-silane (Silane coupling agent KH550), γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-(methacryloxy) propyl trimethoxy silicane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane, vinyltrimethoxy silane, dimethyldichlorosilane, polyethyleneglycol, dodecyl sodium sulfate, softex kw, sorbitan oleate, titanate esters, positive esters of silicon acis, poly silane, Ludox, one or more in phosphate ester and stearic acid.With the gross weight of described improved silica porous material for benchmark, the content of surface modifier wherein can be 2-5 % by weight, is preferably 2.5-3.5 % by weight.
The present invention is not particularly limited the method forming described improved silica porous material, such as, can be by the surface of the spray solution sandblasting porous silica material containing surface modifier, and then mixing is also dry.
The kind of the present invention to described film-forming polymer resin is not particularly limited, can for existing various be conducive to aerogel shaping and be conducive to thermal insulation property improve resin, such as, described film-forming polymer resin can be one or more in epoxy resin, polyester, phenolic resin, acrylate and polyurethane.From the angle that raw material is ready availability, described film-forming polymer resin is particularly preferably epoxy resin.
According to the present invention, described epoxy resin can be selected from bisphenol A type epoxy resin, glycidyl ether type epoxy resin, glycidyl ester epoxy resin, glycidyl amine epoxy resin, aliphatic category epoxy resin, polysulfide-rubber-modified epoxy, polyamide resin modified epoxy, the tertiary butyraldehyde modified epoxy of polyvinyl alcohol, acrylonitrile butadiene rubber modified epoxy resin, phenolic resin modified epoxy resin, polyester resin modified epoxy, urea aldehyde Melamine resin modified epoxy resin, furfural resin modified epoxy, vinyl resin modified epoxy, one or more in isocyanate modified epoxy resin and silicone-modified epoxy resin.
According to the present invention, described polyester can be one or more in PETG, PTT and polybutylene-terephthalate.
According to the present invention, described phenolic resin can be selected from dimethylbenzene phenol-formaldehyde resin modified, epoxy modified phenolic and Effect of Organosilicon-modified Phenol-formaldehyde Resin one or more.
In addition, above-mentioned epoxy resin, polyester, phenolic resin, acrylate and polyurethane all can by commercially available, and also can be prepared according to the method for well known to a person skilled in the art and obtain, all can know these those skilled in the art, therefore not to repeat here.
According to the present invention, according to the needs that reality uses, the heat-insulation and heat-preservation powder coating of described aerogel-congtg selectivity can also contain curing agent, levelling agent and other auxiliary agents.The content of said components can be the routine selection of related domain, such as, with film-forming polymer resin described in 100 weight portions for benchmark, the content of described curing agent can 10-25 weight portion, the content of described levelling agent can be 0.1-3 weight portion, and the content of other auxiliary agents described can be 0-2 weight portion.
Particularly, the kind of described curing agent should be selected according to the kind of film-forming polymer resin used.Such as, for epoxy resin, described curing agent can be amine system curing agent and/or acid anhydrides system curing agent.Particularly, described amine system curing agent can be ethylenediamine, trimethylhexamethylenediamine, diethyl triamine, methylol ethylenediamine, AEEA, dihydroxy ethyl ethylenediamine, ethoxy diethylenetriamine, dihydroxy ethyl ethylenediamine, ethoxy diethylenetriamine, dihydroxy ethyl diethylenetriamine, ethoxy hexamethylene diamine, a cyanoethyl ethylenediamine, dicyanoethyl ethylenediamine, dicyanoethyl hexamethylene diamine, dicyanodiamine, cyclohexanediamine, the Meng alkane diamines, amine ethyl croak piperazine, one or more in IPD and DACH; Described acid anhydrides can be one or more in methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, succinic anhydride and adipic anhydride.For polyester and acrylate, described curing agent can be existing various vinyl monomer, such as, can be one or more in vinyl benzene, vinyltoluene, methyl methacrylate, cyanuric acid triallyl ester, diallyl phthalate etc.Phenolic resin comprises base catalysis phenolic resin and acid catalysis phenolic resin.For base catalysis phenolic resin, usually can carry out heat cure and not need to add curing agent.For acid catalysis phenolic resin, described curing agent can be paraformaldehyde and/or hexamethylenetetramine.
According to the present invention, described levelling agent can be one or more in the acrylic copolymer of load on white carbon, polymethylmethacrylate and the positive butyl ester of polyacrylic acid; The model of the acrylic copolymer of described load on white carbon can be PV88, Modaflow II or PLP100.
The kind of other auxiliary agents described can be selected according to the performance of the environment used and required acquisition, can be curing accelerator, anti-powder agglomates agent, powder flowing agent, growth agent, anti-static agent, charge control agent and pigment dispersion aids one or more, therefore not to repeat here.
According to a kind of embodiment of the present invention, described heat-insulation and heat-preservation powder coating can prepare according to the method comprised the following steps:
(1) by the spray solution containing surface modifier on the surface of porous silica material, and then to mix; (2) mixture step (1) obtained is dry, forms the porous silica material of surface modification and makes its water content be less than 0.05wt%; (3) the porous silica material of surface modification, film-forming polymer resin and curing agent are sized to particle diameter and are less than 1.5mm; (4) film-forming polymer resin composition is obtained in the film-forming polymer resin obtained after the curing agent, levelling agent and other auxiliary agents that obtain after screening being scattered in screening; (5) by the porous silica material of surface modification obtained after screening and described film-forming polymer resin composition mixing, extrude, compressing tablet and fragmentation.
According to the present invention, in step (1), described mixing can to mix under certain rotating speed in centrifuge mixing apparatus.Wherein, in order to more be conducive to the Homogeneous phase mixing of material, mixed process of the present invention is preferably carried out in two steps.Head mixes at the low rotational speed, namely at rotating speed is to mix 300min under the rotating speed of 100-1000r/min, preferably under the rotating speed of 300-800r/min, mixes 300min; And then mix at high speed, mix 10-120min under the high rotating speed being namely 1000-2500r/min at rotating speed, preferably under the high rotating speed of 1500-2000r/min, mix 60-120min.
According to the present invention, the described solution containing surface modifier is the mixed solution of at least one surface modifier and at least one organic solvent, and with the weight of described porous silica material for benchmark, the consumption of described surface modifier can be 2-5 % by weight, be preferably 2.5-3.5 % by weight.The weight ratio of described surface modifier and described organic solvent can be 1-5:100, is preferably 1.5-3.5:100.In addition, the preparation method of above-mentioned heat-insulation and heat-preservation powder coating is also included in before the spray solution containing surface modifier is on porous silica material surface, first the described solution containing surface modifier is contacted so that its pH value is adjusted to 3-6 with acidic materials, be preferably adjusted to 3.5-5.5.The kind of described acidic materials is known to the skilled person, and such as, can be one or more in oxalic acid, acetic acid, phosphoric acid and p-methyl benzenesulfonic acid, be preferably oxalic acid.In addition, described organic solvent can be one or more in mineral oil, paraffin oil, methyl alcohol, ethanol, isopropanol, organic silicone oil and water, is preferably ethanol and methyl alcohol.
According to the present invention, described fibre strengthening aerogel fabric can be the existing various material containing aerogel and fiber.The thermal conductivity of described fibre strengthening aerogel fabric is preferably 20-80mW/mK, be more preferably 20-40mW/mK, can make like this to comprise, by the first heat insulation layer 3 of described fibre strengthening aerogel formation of fabrics and the pipeline of the second heat insulation layer 5, there is better heat insulation effect.
Particularly, described fibre strengthening aerogel fabric is preferably containing the second aerogel and doughnut.The consumption of described second aerogel and doughnut can carry out choose reasonable according to actual conditions, and such as, with the gross weight of described fibre strengthening aerogel fabric for benchmark, the content of described second aerogel can be 1-50 % by weight, is preferably 15-50 % by weight; The content of described doughnut can be 50-99 % by weight, is preferably 50-85 % by weight.
According to the present invention, in order to from be convenient to describe angle, the aerogel contained in the heat-insulation and heat-preservation powder coating of described aerogel-congtg is called " the first aerogel ", and the aerogel contained in described fibre strengthening aerogel fabric is called " the second aerogel ".The kind of described second aerogel reasonably can be selected according to the kind of above-mentioned first aerogel, and therefore not to repeat here.
The kind of described doughnut can be that the routine of related domain is selected, and can have the fiber of cavity for existing various axis, such as, can be in hollow glass fibre, hollow ceramic fiber and hollow polymer fiber one or more.Wherein, the polymer in described hollow polymer fiber can be one or more in polyethylene, polypropylene, polyester (as PETG, PTT, polybutylene-terephthalate etc.), PLA, Nomex, polyimide, Polyetherimide, polyparaphenylene's benzo two oxazole, polyether-ether-ketone and phenol-formaldehyde resin.
The external diameter of the present invention to described doughnut is not particularly limited, and such as, can be 10-120 micron, is preferably 30-80 micron.In addition, as mentioned above, the axis of described doughnut has cavity, that is, the cross section of described doughnut is the donut structure with certain wall thickness.In order to make the pipeline of described pipeline and band box cupling under the prerequisite with excellent thermal insulation property, antiseptic property, wear-resisting property, also there is higher mechanical strength, the internal diameter of described doughnut and the ratio of external diameter are preferably 0.3-0.8:1, are more preferably 0.4-0.6:1.Described doughnut can use with single or many doughnut long filaments and/or short silk form, also can use with the form of doughnut fabric (as woven fabric, nonwovens etc.).Wherein, when using with the form of single or many doughnut long filaments, the length of described doughnut can be 50-400mm; When using with the form of single or the many short silks of doughnut, the length of described doughnut can be 0.5-2mm.In addition, described inside hollow fibre can be vacuum, also can be filled with air and/or inert gas, as nitrogen and/or argon gas etc.In the present invention, described vacuum does not refer to absolute vacuum, and refers to that absolute pressure is at below 20Pa.
According to the present invention, described anticorrosion antiwear liner 1 can be formed by existing various anticorrosion antiwear resin.Preferably, described anticorrosion antiwear resin is selected from one or more in ultra-high molecular weight polyethylene, polypropylene, teflon, perfluoroethylene-propylene copolymer and ethylene-chlorotrifluoro-ethylene copolymer.Wherein, described ultra-high molecular weight polyethylene is the polyethylene of number average molecular more than 1,000,000.
According to the present invention, described interior pipe 2 can be identical with the material of outer tube 6, also can be different, and can be independently not saturating steel and/or carbon steel separately.
According to the present invention, described thermal-protective coating 4 can be the thermal-protective coating formed by existing various thermal-protective material; Also for being formed at the cavity structure between described first heat insulation layer 3 and the second heat insulation layer 5, and air and/or inert gas can be filled with in described cavity structure, or vacuum; Be preferably the latter, described first heat insulation layer 3 can be made like this, play between thermal-protective coating 4 and the second heat insulation layer 5 and better coordinate insulation effect.
According to the present invention, preferably, described cavity structure makes the two be separated and formed by the supporting structure be arranged between the first heat insulation layer 3 with the second heat insulation layer 5, can avoid the thermal stress in described pipeline better like this and prevent the distortion of each construction layer in described pipeline.
Particularly, as shown in Figures 2 and 3, described supporting structure can comprise support 8 and supporter 9 usually, described support 8 comprises support 81 and draw-in groove 82, on the wall that described support 81 is fixed on interior pipe 2 and with upper opening, described draw-in groove 82 is fixed on the inner side of the upper opening of described support 81, and above support 9 to be fixed on support 81 by draw-in groove 82 and to contact with outer tube 6 with interior pipe 2 respectively.
It is fan-shaped that described supporting structure is preferably ring.Now, described supporting structure and interior pipe 2 and outer tube 6 are concentric structure, and the inner ring radius of support 8 equals the external diameter of interior pipe 2, and the outer shroud radius of supporter 9 equals the internal diameter of outer tube 6.The fan-shaped angle of described ring can be 30 °-75 °, is preferably 45 °-60 °.In addition, described supporting structure can be arranged according to actual conditions, such as, equidistantly can arrange along the axial direction of pipeline and circumferencial direction, and the number of same supporting structure circumferentially can be 3-5 usually.
The thickness of the present invention to described thermal-protective coating 4 is not particularly limited, but with the total thickness of described first heat insulation layer 3 and the second heat insulation layer 5 for benchmark, the thickness of described thermal-protective coating 4 is preferably 500-3000%, be more preferably 500-2500%, the lower thermal conductivity advantage of gas or vacuum environment can not only be increased like this, effectively can also avoid the formation of thermoconvection, thus make the pipeline obtained have better thermal insulation property.
According to the present invention, described external anti-corrosion layer 7 can be formed by existing various anti-corrosion material, such as, described anti-corrosion material can be selected from epoxy resin, polyurethane and phenolic resin one or more.
The thickness of the present invention to each layer above-mentioned in described pipeline is not particularly limited, and such as, the thickness of described anticorrosion antiwear liner 1 can be 1-5mm, is preferably 3-5mm; The thickness of interior pipe 2 can be 2-8mm, is preferably 3-6mm; The thickness of the first heat insulation layer 3 can be 0.5-3mm, is preferably 0.5-1mm; The thickness of the second heat insulation layer 5 can be 0.5-3mm, is preferably 0.5-1mm; The thickness of outer tube 6 can be 2-8mm, is preferably 3-6mm; The thickness of external anti-corrosion layer 7 can be 0.5-2mm, is preferably 0.5-1mm.In addition, the external diameter of interior pipe 2 is generally 40-150mm, and the internal diameter of outer tube 6 is generally 70-200mm.
The preparation method of the present invention to described pipeline is not particularly limited, and the method for existing various formation multilayer tubular structures can be adopted to carry out, and therefore not to repeat here.
The pipeline of band box cupling provided by the invention comprises at least two above-mentioned pipelines and at least one box cupling.Wherein, Fig. 2 is the axial sectional view of the pipeline of described band box cupling.
According to the present invention, in order to more be conducive to closely cooperating between described pipeline and box cupling, preferably, the outer surface of the end be connected with described box cupling of described pipeline has external thread structure 10, and described box cupling correspondingly has female thread structure, the two is threaded togather.
According to the present invention, in order to more be conducive to closely cooperating between described pipeline and box cupling, preferably, the end be connected with described box cupling of described pipeline is provided with flared joint 17.More preferably, the inner side of described flared joint 17 is provided with antiseptic wearable coat 18, effectively can avoid the wearing and tearing in described pipeline and box cupling cohesive process like this.Wherein, Fig. 4 is the enlarged diagram of the A position of flared joint 17 in Fig. 2.As can be seen from Figure 4, in the inner side of flared joint 17, namely the side in axle center is provided with antiseptic wearable coat.
According to the present invention, described antiseptic wearable coat 18 can be formed by existing various anticorrosion antiwear resin, such as, described anticorrosion antiwear resin can be selected from one or more in ultra-high molecular weight polyethylene, polypropylene, teflon, perfluoroethylene-propylene copolymer and ethylene-chlorotrifluoro-ethylene copolymer.Wherein, described ultra-high molecular weight polyethylene is the polyethylene of number average molecular more than 1,000,000.
According to the present invention, described box cupling can be identical with existing box cupling, and preferably, described box cupling is equipped with box cupling thermal-protective coating 12 between the box cupling inner protective layer 13 ' and box cupling external protection 13 of existing box cupling structure.Concrete structure as shown in Figure 2, comprises bushing pipe 14, sealing layer, box cupling inner protective layer 13 ', box cupling thermal-protective coating 12 and box cupling external protection 13 from inside to outside successively, is provided with lining 15 and seal ring 16 in described sealing layer.
Wherein, preferably, described box cupling thermal-protective coating 12 comprises the cavity structure be formed between box cupling inner protective layer 13 ' and box cupling external protection 13, is filled with one or more in aerogel particle, air and inert gas in this cavity structure, or vacuum.The kind of described aerogel particle can be that the routine of related domain is selected, and such as, can be one or more in aerosil, aluminium sesquioxide aerogel, ZrO_2 aerogel, titania aerogel etc., preferably aerosil.
According to the present invention, in order to more be conducive to the raising of the thermal insulation property of the pipeline of described band box cupling, preferably, as shown in Figure 2, the two ends of described box cupling thermal-protective coating 12 are provided with box cupling seal ring 11.
Main improvements of the present invention are to have employed a kind of new pipeline and preferably between the box cupling inner protective layer 13 ' and box cupling external protection 13 of existing box cupling structure, are equipped with box cupling thermal-protective coating 12; and other structures of box cupling and concrete Placement all can be same as the prior art, therefore not to repeat here.In addition; described box cupling can adopt existing various method to be prepared; such as; can improve on the basis of existing box cupling; to be equipped with box cupling thermal-protective coating 12 between box cupling inner protective layer 13 ' and box cupling external protection 13; specific operation are known to the skilled person, and do not repeat them here.
Below will be described the present invention by embodiment.
In following preparation example, embodiment and comparative example:
Particle diameter is measured by Malvern company Mastersizer 2000E type laser particle analyzer, thermal conductivity is measured by the DRP-4A type thermal conductivity measuring apparatus of Tianjin Jian Yi testing machine Co., Ltd, specific surface area and porosity is measured by nitrogen adsorption methods, and bore dia is measured by the scanning electron microscope that to be purchased from the model of Hitachi company be ES-4700.In heat-insulation and heat-preservation powder coating and fibre strengthening aerogel fabric, the content of each material is calculated by rate of charge.
The porous silica material adopted in following preparation example, embodiment and comparative example is purchased from Cabot Co., Ltd, and particle diameter is 5-1000 μm, and thermal conductivity is 12mW/mK, and specific surface area is 750 meters squared per gram, and aperture is 20-40nm, and porosity ratio is 95%.
In following examples and comparative example:
The structure of pipeline as depicted in figs. 1 and 2, comprises from inside to outside successively: anticorrosion antiwear liner 1, interior pipe 2, first heat insulation layer 3, thermal-protective coating 4, second heat insulation layer 5, outer tube 6 and external anti-corrosion layer 7.Interior pipe 2 be Ф 50 × 5(wherein, Ф 50 represents that external diameter is 50mm, and thickness is 5mm) stainless steel pipeline, outer tube 6 be Ф 80 × 5.5(wherein, Ф 80 represents that internal diameter is 80mm, and thickness is 5.5mm) stainless steel pipeline.Thermal-protective coating 4, for being formed at the cavity structure between described first heat insulation layer 3 and the second heat insulation layer 5, is filled with air and/or inert gas in described cavity structure, or vacuum.Described cavity structure makes the two be separated by the supporting structure be arranged between the first heat insulation layer 3 with the second heat insulation layer 5 and is formed, and supporting structure is concrete as shown in Figure 3, namely, comprise support 8 and supporter 9, described support 8 comprises support 81 and draw-in groove 82, on the wall that described support 81 is fixed on interior pipe 2 and with upper opening, described draw-in groove 82 is fixed on the inner side of the upper opening of described support 81, and above support 9 to be fixed on support 81 by draw-in groove 82 and to contact with outer tube 6 with interior pipe 2 respectively; To be angle be described supporting structure that the ring of 45 ° is fan-shaped, and described supporting structure is all equidistantly arranged along the axial direction of pipeline and circumferencial direction, and the setting of circumferential direction is spaced apart 1 meter, and same supporting structure is circumferentially 3.Described pipeline treat that the end be connected with box cupling is provided with flared joint 17, and the inner side of described flared joint 17 is provided with antiseptic wearable coat 18.The outer surface treating the end be connected with box cupling of described pipeline has external thread structure.
Box cupling is equipped with box cupling thermal-protective coating 12 between the box cupling inner protective layer 13 ' and box cupling external protection 13 of existing box cupling structure; specifically as shown in Figure 2; comprise bushing pipe 14, sealing layer, box cupling inner protective layer 13 ', box cupling thermal-protective coating 12 and box cupling external protection 13 from inside to outside successively; be provided with lining 15 and seal ring 16 in described sealing layer, the two ends of described box cupling thermal-protective coating 12 are provided with box cupling seal ring 11.Described box cupling thermal-protective coating 12 comprises the cavity structure be formed between box cupling inner protective layer 13 ' and box cupling external protection 13, is filled with one or more in aerogel particle, air and inert gas in this cavity structure, or vacuum.Described box cupling treat correspondingly there is female thread structure with on the surface that described pipeline is connected.Described box cupling treat that the flared joint 17 of end and the pipeline be connected with described pipeline coordinates.
The pipeline of 3 same sizes is threaded connection the pipeline of the band box cupling forming one 3 meters long with 2 box cuplings.The thermal insulation property of the pipeline of described band box cupling, antiseptic property and wear-resisting property measure as follows.
(1) thermal insulation property test:
It is that the hot water of 97 DEG C flows into from one end of the pipeline of band box cupling by temperature that thermal insulation property adopts, and flows out from the other end, and by detecting inlet water temperature, the temperature of outlet water temperature, pipeline outer wall temperature and two box cuplings reflected.Inlet water temperature and outlet water temperature adopt RTD thermal resistance measurement, and the temperature of pipeline outer wall temperature and box cupling adopts FLUKE infrared radiation thermometer to measure.All temperature samplings, sampling and measuring after pipeline flow stablizes half an hour.Measuring place ambient temperature is 30.3 DEG C.Thermal loss is in the process calculated by Q=CG ⊿ T, and wherein, C is the thermal capacitance value of water, and G is that the mass flow rate ， ⊿ T of water is for importing and exporting water temperature difference.The thermal conductivity of pipeline is measured by the DRP-4A type thermal conductivity measuring apparatus of Tianjin Jian Yi testing machine Co., Ltd.
(2) antiseptic property:
Antiseptic property measures according to the method specified in GB1763-79, particularly, by also dry on a surface of steel disc for the coating even application forming external anti-corrosion layer 7 in corresponding embodiment, to form the coating that thickness is 5mm, then it is in the aqueous sulfuric acid of 20 % by weight that 2/3 area surface all being scribbled the steel disc of above-mentioned coating is immersed in concentration, observes whether 168 hours undercoating are peeled off, bubble, got rusty, the phenomenon such as variable color and loss of gloss occurs.
(3) wear-resisting property:
By also dry on steel disc for the coating even application forming anticorrosion antiwear liner 1 in corresponding embodiment, to form the coating that thickness is 5mm, and characterize mensuration wear-resisting property according to the QHS type pipeline coatings scratch depth detector of Tianjin Jian Yi testing machine Co., Ltd.
Preparation example 1
This preparation example is for illustration of heat-insulation and heat-preservation powder coating provided by the invention and preparation method thereof.
(1) by the spray solution containing surface modifier on the surface of porous silica material:
By 5 grams of γ-(methacryloxy) propyl trimethoxy silicane is dissolved in anhydrous alcohol with the mass ratio of 3:100, be stirred to and dissolve completely, and adopt oxalic acid that the pH value of this solution is adjusted to 3, obtain the alcohol solution containing γ-(methacryloxy) propyl trimethoxy silicane.200 grams of porous silica materials are added in centrifuge mixing apparatus, again 100 grams of above-mentioned spray solutions containing γ-(methacryloxy) propyl trimethoxy silicane are also first mixed 300min on the surface of porous silica material under the slow-speed of revolution of 300r/min, and then mix 120min under the high rotating speed of 2000r/min.
(2) the porous silica material of the surface modification that preparation is dry:
The product that step (1) obtains is placed in vacuum dryer dry, makes its water content be less than 0.05wt%, obtain the porous silica material of surface modification.Wherein, the Mean particle diameter of the porous silica material of this surface modification is 40 μm, and thermal conductivity is 12mW/mK, and specific surface area is 700 meters squared per gram, and most probable pore size is 10nm, and porosity ratio is 90%.
(3) Sieving and casing:
The porous silica material of surface modification, epoxy resin (purchased from Sinopec, trade mark EP-E44) and dicy-curing agent (purchased from Shanghai Zhong Si Industrial Co., Ltd., trade mark Dyhard 100) are sized to particle diameter and are less than 1.5mm.
(4) membrane fussion resin composition is prepared into:
Be that the acrylic copolymer of Modaflow II load on white carbon (purchased from Belgian UCB. S.A. (BE) Bruxelles Belgium) and 5 grams of curing accelerators are (purchased from Shanghai Li He Chemical Co., Ltd. by 150 grams of above-mentioned dicy-curing agents, 30 grams of models, trade mark D-8) to join in 600 grams of above-mentioned epoxy resin and to be uniformly mixed, obtain Film forming resin compositions.
(5) mixing, extrude, compressing tablet and fragmentation:
By the porous silica material of 200 grams of above-mentioned surface modifications and the mixing of film-forming polymer resin composition, and the mixture obtained is delivered to mixing extruder, controlling extruder feeding section temperature is 50 DEG C, melt zone temperature is 95 DEG C, changeover portion temperature is 100 DEG C, kneading block temperature is 100 DEG C, and discharging section temperature is 95 DEG C.Then the melt extrudate obtained is pressed into by preforming roller the thin slice that thickness is 1.5mm, then again the thin slice obtained is sent into broken in shredder and sieve after being separated by cyclone separator, obtaining heat-insulation and heat-preservation powder coating T1.
Calculated by the addition of material and learn, described heat-insulation and heat-preservation powder coating T1 contain the surface modification of 20 % by weight porous silica material, 61 % by weight epoxy resin, the dicy-curing agent of 15 % by weight, the acrylic copolymer of load on white carbon of 3 % by weight and the curing accelerator of 0.5 % by weight.The particle diameter adopting laser particle analyzer to characterize the heat-insulation and heat-preservation powder coating T1 that this enforcement prepares is between 30 μm-100 μm.The thermal conductivity adopting thermal conductivity measuring apparatus to characterize the heat-insulation and heat-preservation powder coating T1 that this enforcement prepares is 56.2mW/mK.
Preparation example 2
This preparation example is for illustration of heat-insulation and heat-preservation powder coating provided by the invention and preparation method thereof.
(1) by the spray solution containing surface modifier on the surface of porous silica material
5 grams of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane is dissolved in anhydrous alcohol with the mass ratio of 3:100, be stirred to and dissolve completely, and adopt acetic acid that the pH value of this solution is adjusted to 6, obtain the alcohol solution containing N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.200 grams of porous silica materials are added in centrifuge mixing apparatus, again 100 grams of above-mentioned spray solutions containing N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane are also first mixed 300min on the surface of porous silica material under the slow-speed of revolution of 500r/min, and then mix 120min under the high rotating speed of 2500r/min.
(2) the porous silica material of the surface modification that preparation is dry:
The product that step (1) obtains is placed in vacuum dryer dry, makes its water content be less than 0.05wt%, obtain the porous silica material of surface modification.Wherein, the Mean particle diameter of the porous silica material of this surface modification is 500 μm, and thermal conductivity is 20mW/mK, and specific surface area is 800 meters squared per gram, and most probable pore size is 25nm, and porosity ratio is 98%.
(3) Sieving and casing:
The porous silica material of surface modification, phenolic resin (purchased from Hebei Yu Zheng chemical building material Co., Ltd, the trade mark 2130) and imidazole curing agent (purchased from Wuxi Shao Hui trade Co., Ltd, the trade mark is 2E4MZ-CN) are sized to particle diameter and are less than 1.5mm.
(4) membrane fussion resin composition is prepared into:
By 150 grams of above-mentioned imidazole curing agents, 30 grams of PV88 levelling agents (coming this new chemical materials Co., Ltd purchased from Hubei) and 5 grams of curing accelerators (purchased from waste residue chemical plant, Tong Qisi river, Jiangyin City, trade mark DMP-30) to join in 600 grams of phenolic resin and to be uniformly mixed, obtain film-forming polymer resin composition.
(5) mixing, extrude, compressing tablet and fragmentation:
By the porous silica material of 150 grams of above-mentioned surface modifications and the mixing of film-forming polymer resin composition, and the mixture obtained is delivered to mixing extruder, controlling extruder feeding section temperature is 50 DEG C, melt zone temperature is 95 DEG C, changeover portion temperature is 100 DEG C, kneading block temperature is 100 DEG C, and discharging section temperature is 95 DEG C.Then the melt extrudate obtained is pressed into by preforming roller the thin slice that thickness is 1.5mm, then again the thin slice obtained is sent into broken in shredder and sieve after being separated by cyclone separator, obtaining heat-insulation and heat-preservation powder coating T2.
Calculated by the addition of material and learn, described heat-insulation and heat-preservation powder coating T2 contain the surface modification of 16 % by weight porous silica material, 64 % by weight phenolic resin, the imidazole curing agent of 16 % by weight, the PV88 levelling agent of 3 % by weight and 0.5 % by weight curing accelerator.The particle diameter adopting laser particle analyzer to characterize the heat-insulation and heat-preservation powder coating T2 that this enforcement prepares is between 30 μm-100 μm.The thermal conductivity adopting thermal conductivity measuring apparatus to characterize the heat-insulation and heat-preservation powder coating T2 that this enforcement prepares is 126.7mW/mK.
Preparation example 3
This preparation example is for illustration of heat-insulation and heat-preservation powder coating provided by the invention and preparation method thereof.
(1) by the spray solution containing surface modifier on the surface of porous silica material:
5 grams of gamma-aminopropyl-triethoxy-silanes (Silane coupling agent KH550) are dissolved in methyl alcohol with the mass ratio of 3:100, be stirred to and dissolve completely, and adopt p-methyl benzenesulfonic acid that the pH value of this solution is adjusted to 5, obtain the methanol solution containing gamma-aminopropyl-triethoxy-silane.200 grams of porous silica materials are added in centrifuge mixing apparatus, again 50 grams of above-mentioned spray solutions containing gamma-aminopropyl-triethoxy-silane are also first mixed 300min on the surface of porous silica material under the slow-speed of revolution of 300r/min, and then mix 120min under the high rotating speed of 2200r/min.
(2) the porous silica material of the surface modification that preparation is dry:
The product that step (1) obtains is placed in vacuum dryer dry, makes its water content be less than 0.05wt%, obtain the porous silica material of surface modification.Wherein, the Mean particle diameter of the porous silica material of this surface modification is 20 μm, and thermal conductivity is 12mW/mK, and specific surface area is 500 meters squared per gram, and most probable pore size is 10nm, and porosity ratio is 80%.
(3) Sieving and casing:
The porous silica material of surface modification, epoxy resin (purchased from Sinopec, trade mark EP-E44) and 4,4-diamino-diphenyl sulfone are sized to particle diameter and are less than 1.5mm.
(4) membrane fussion resin composition is prepared into:
By 200 grams above-mentioned 4,4-diamino-diphenyl sulfone, 30 grams of PLP100 levelling agents and 5 grams of curing accelerators are (purchased from Dongguan City Hui Zhou macromolecular material Co., Ltd, trade mark RP-126) to join in 600 grams of epoxy resin and to be uniformly mixed, obtain film-forming polymer resin composition.
(5) mixing, extrude, compressing tablet and fragmentation:
By the porous silica material of 100 grams of above-mentioned surface modifications and the mixing of film-forming polymer resin composition, and the mixture obtained is delivered to mixing extruder, controlling extruder feeding section temperature is 50 DEG C, melt zone temperature is 95 DEG C, changeover portion temperature is 100 DEG C, kneading block temperature is 100 DEG C, and discharging section temperature is 95 DEG C.Then the melt extrudate obtained is pressed into by preforming roller the thin slice that thickness is 1.5mm, then again the thin slice obtained is sent into broken in shredder and sieve after being separated by cyclone separator, obtaining heat-insulation and heat-preservation powder coating T3.
Calculated by the addition of material and learn, described heat-insulation and heat-preservation powder coating T3 contain the surface modification of 11 % by weight porous silica material, 64 % by weight epoxy resin, 4, the 4-diamino-diphenyl sulfone of 16 % by weight, the PLP100 levelling agent of 3 % by weight and 0.5 % by weight curing accelerator.The particle diameter adopting laser particle analyzer to characterize the heat-insulation and heat-preservation powder coating T3 that this enforcement prepares is between 30 μm-100 μm.The thermal conductivity adopting thermal conductivity measuring apparatus to characterize the heat-insulation and heat-preservation powder coating T3 that this enforcement prepares is 147.3mW/mK.
Embodiment 1
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
In described pipeline, the ultra-high molecular weight polyethylene that anticorrosion antiwear liner 1 is 1,500,000 by number-average molecular weight is formed, first heat insulation layer 3 and the second heat insulation layer 5 all heat-insulation and heat-preservation powder coating T1 are formed, what fill in the cavity structure of formation thermal-protective coating 4 is air, external anti-corrosion layer 7 by epoxy powder ((purchased from Sinopec, trade mark EP-E44, lower same)) formed, the ultra-high molecular weight polyethylene that antiseptic wearable coat 18 is 1,500,000 by number-average molecular weight is formed.In addition, the thickness of anticorrosion antiwear liner 1 is 5mm, interior pipe 2 is the stainless steel pipeline of Ф 50 × 5, the thickness of the first heat insulation layer 3 is 0.55mm, the thickness of thermal-protective coating 4 is 18.91mm, and the thickness of the second heat insulation layer 5 is 0.54mm, and outer tube 6 is the stainless steel pipeline of Ф 80 × 5.5, the thickness of external anti-corrosion layer 7 is 750 microns, and the thickness of antiseptic wearable coat 18 is 5mm.
In described box cupling, forming what fill in the cavity structure of described box cupling thermal-protective coating 12 is air, and the thickness of cavity insulation layer is 10mm.
The pipeline of 3 same sizes is threaded connection the pipeline G1 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Embodiment 2
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
In described pipeline, the ultra-high molecular weight polyethylene that anticorrosion antiwear liner 1 is 1,500,000 by number-average molecular weight is formed, first heat insulation layer 3 and the second heat insulation layer 5 are formed by heat-insulation and heat-preservation powder coating T2, what fill in the cavity structure of formation thermal-protective coating 4 is nitrogen, external anti-corrosion layer 7 is by polyurethane (Beyer Co., Ltd, DP 3059D) formed, the ultra-high molecular weight polyethylene that antiseptic wearable coat 18 is 1,500,000 by number-average molecular weight is formed.In addition, the thickness of anticorrosion antiwear liner 1 is 5mm, the specification of interior pipe 2 is identical with embodiment 1, the thickness of the first heat insulation layer 3 is 0.52mm, the thickness of thermal-protective coating 4 is 18.98mm, and the thickness of the second heat insulation layer 5 is 0.50mm, and the specification of outer tube 6 is identical with embodiment 1, the thickness of external anti-corrosion layer 7 is 750 microns, and the thickness of antiseptic wearable coat 18 is 5mm.
In described box cupling, forming what fill in the cavity structure of described box cupling thermal-protective coating 12 is nitrogen, and the thickness of cavity insulation layer is 10mm.
The pipeline of 3 same sizes is threaded connection the pipeline G2 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Embodiment 3
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
In described pipeline, the ultra-high molecular weight polyethylene that anticorrosion antiwear liner 1 is 1,500,000 by number-average molecular weight is formed, first heat insulation layer 3 and the second heat insulation layer 5 are formed by heat-insulation and heat-preservation powder coating T3, what fill in the cavity structure of formation thermal-protective coating 4 is nitrogen, external anti-corrosion layer 7 by phenolic resin (purchased from Hong Fu anti-corrosion material Co., Ltd of Xinxiang City, 2130 types) formed, the ultra-high molecular weight polyethylene that antiseptic wearable coat 18 is 1,500,000 by number-average molecular weight is formed.In addition, the thickness of anticorrosion antiwear liner 1 is 5mm, the specification of interior pipe 2 is identical with embodiment 1, the thickness of the first heat insulation layer 3 is 0.53mm, the thickness of thermal-protective coating 4 is 18.95mm, and the thickness of the second heat insulation layer 5 is 0.52mm, and the specification of outer tube 6 is identical with embodiment 1, the thickness of external anti-corrosion layer 7 is 750 microns, and the thickness of antiseptic wearable coat 18 is 5mm.
In described box cupling, forming what fill in the cavity structure of described box cupling thermal-protective coating 12 is nitrogen, and the thickness of cavity insulation layer is 10mm.
The pipeline of 3 same sizes is threaded connection the pipeline G3 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Embodiment 4
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
In described pipeline, the ultra-high molecular weight polyethylene that anticorrosion antiwear liner 1 is 1,500,000 by number-average molecular weight is formed, first heat insulation layer 3 and the second heat insulation layer 5 are by fibre strengthening aerogel fabric (wherein, containing the porous silica silicon materials of 15 % by weight and the hollow terylene nonwovens of 85 % by weight, thermal conductivity is 40mW/mK) formed, what fill in the cavity structure of formation thermal-protective coating 4 is nitrogen, external anti-corrosion layer 7 is formed by epoxy powder, and the ultra-high molecular weight polyethylene that antiseptic wearable coat 18 is 1,500,000 by number-average molecular weight is formed.In addition, the thickness of anticorrosion antiwear liner 1 is 5mm, the specification of interior pipe 2 is identical with embodiment 1, the thickness of the first heat insulation layer 3 is 1.51mm, the thickness of thermal-protective coating 4 is the thickness of the 16.99, second heat insulation layer 5 is 1.50mm, and the specification of outer tube 6 is identical with embodiment 1, the thickness of external anti-corrosion layer 7 is 750 microns, and the thickness of antiseptic wearable coat 18 is 5mm.
In described box cupling, forming what fill in the cavity structure of described box cupling thermal-protective coating 12 is nitrogen, and the thickness of cavity insulation layer is 10mm.
The pipeline of 3 same sizes is threaded connection the pipeline G4 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Embodiment 5
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
The pipeline of this embodiment is identical with embodiment 4, unlike, in fibre strengthening aerogel fabric, the content of porous silica silicon materials is 30 % by weight, and the content of PET Hollow fiber is 70 % by weight, and the thermal conductivity of fibre strengthening aerogel fabric is 30mW/mK.
The box cupling of this embodiment is identical with the box cupling of embodiment 4.
The pipeline of 3 same sizes is threaded connection the pipeline G5 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Embodiment 6
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
The pipeline of this embodiment is identical with embodiment 4, unlike, in fibre strengthening aerogel fabric, the content of porous silica silicon materials is 50 % by weight, and the content of PET Hollow fiber is 50 % by weight, and the thermal conductivity of fibre strengthening aerogel fabric is 20mW/mK.
The box cupling of this embodiment is identical with the box cupling of embodiment 4.
The pipeline of 3 same sizes is threaded connection the pipeline G6 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Embodiment 7
This embodiment is for illustration of pipeline provided by the invention and the pipeline being with box cupling.
The pipeline of this embodiment is identical with embodiment 6, unlike, the cavity structure forming thermal-protective coating 4 is (pressure is less than 100Pa) of vacuum.
The box cupling of this embodiment is identical with the box cupling of embodiment 6.
The pipeline of 3 same sizes is threaded connection the pipeline G7 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Comparative example 1
The pipeline of this comparative example for illustration of reference and the pipeline of band box cupling.
Pipeline in this comparative example does not have the first heat insulation layer 3 and the second heat insulation layer 5, and structure, the material of other layers are identical with embodiment 6 with thickness.
The box cupling of this comparative example is identical with the box cupling of embodiment 6.
The pipeline of 3 same sizes is threaded connection the reference pipeline DG1 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
Comparative example 2
The pipeline of this comparative example for illustration of reference and the pipeline of band box cupling.
The box cupling of this comparative example is identical with the pipeline configuration of embodiment 6.
Box cupling in this comparative example does not have box cupling thermal-protective coating 12, and structure, the material of other layers are identical with embodiment 6 with thickness.
The pipeline of 3 same sizes is threaded connection the reference pipeline DG2 of the band box cupling forming one 3 meters long with 2 box cuplings, the test result of its thermal insulation property, antiseptic property and wear-resisting property is as shown in table 1.
As can be seen from the above results, the pipeline of pipeline provided by the invention and band box cupling can have excellent thermal insulation property, corrosion resistance and wear-resisting property concurrently simultaneously.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned mode of execution, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (21)

1. a pipeline, it is characterized in that, described pipeline comprises from inside to outside successively: anticorrosion antiwear liner (1), interior pipe (2), the first heat insulation layer (3), thermal-protective coating (4), the second heat insulation layer (5), outer tube (6) and external anti-corrosion layer (7), the material forming described first heat insulation layer (3) and the second heat insulation layer (5) is identical or different, and is heat-insulation and heat-preservation powder coating and/or the fibre strengthening aerogel fabric of aerogel-congtg independently of one another.
2. pipeline according to claim 1, wherein, the thermal conductivity of the heat-insulation and heat-preservation powder coating of described aerogel-congtg is 30-150mW/mK; Preferably, the heat-insulation and heat-preservation powder coating of described aerogel-congtg contains the first aerogel and film-forming polymer resin; Preferably, with the gross weight of the heat-insulation and heat-preservation powder coating of described aerogel-congtg for benchmark, the content of described first aerogel is 1-50 % by weight, and the content of described film-forming polymer resin is 50-99 % by weight.
3. pipeline according to claim 1, wherein, the thermal conductivity of described fibre strengthening aerogel fabric is 20-80mW/mK; Preferably, described fibre strengthening aerogel fabric contains the second aerogel and doughnut; Preferably, with the gross weight of described fibre strengthening aerogel fabric for benchmark, the content of described second aerogel is 1-50 % by weight, and the content of described doughnut is 50-99 % by weight.
4. the pipeline according to Claims 2 or 3, wherein, described first aerogel and the second aerogel identical or different, and be hydrophobic aerogel independently of one another.
5. pipeline according to claim 4, wherein, described first aerogel and the second aerogel are porous silica material; Preferably, the particle diameter of described porous silica material is 5 μm-1000 μm, and thermal conductivity is 12-40mW/mK, and specific surface area is 300-800 meters squared per gram, and bore dia is 10-40nm, and porosity ratio is 90%-98%.
6. pipeline according to claim 5, wherein, described porous silica material is the improved silica porous material obtained with surface modifying agent, described surface modifier is gamma-aminopropyl-triethoxy-silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-(methacryloxy) propyl trimethoxy silicane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane, vinyltrimethoxy silane, dimethyldichlorosilane, polyethyleneglycol, dodecyl sodium sulfate, softex kw, sorbitan oleate, titanate esters, positive esters of silicon acis, poly silane, Ludox, one or more in phosphate ester and stearic acid.
7. pipeline according to claim 2, wherein, described film-forming polymer resin is one or more in epoxy resin, polyester, phenolic resin, acrylate and polyurethane.
8. pipeline according to claim 3, wherein, described doughnut be in hollow glass fibre, hollow ceramic fiber and hollow polymer fiber one or more.
9. pipeline according to claim 1, wherein, described anticorrosion antiwear liner (1) is formed by anticorrosion antiwear resin, described anticorrosion antiwear resin be selected from ultra-high molecular weight polyethylene, polypropylene, teflon, perfluoroethylene-propylene copolymer and ethylene-chlorotrifluoro-ethylene copolymer one or more.
10. pipeline according to claim 1, wherein, the material of described interior pipe (2) and outer tube (6) is identical or different, and is not saturating steel and/or carbon steel independently of one another.
11. pipelines according to claim 1, wherein, described thermal-protective coating (4), for being formed at the cavity structure between described first heat insulation layer (3) and the second heat insulation layer (5), is filled with air and/or inert gas in described cavity structure, or vacuum.
12. pipelines according to claim 11, wherein, described cavity structure makes the two be separated by the supporting structure be arranged between the first heat insulation layer (3) with the second heat insulation layer (5) and is formed.
13. pipelines according to claim 11 or 12, wherein, with the total thickness of described first heat insulation layer (3) and the second heat insulation layer (5) for benchmark, the thickness of described thermal-protective coating (4) is 500-3000%, is preferably 500-2500%.
14. pipelines according to claim 1, wherein, described external anti-corrosion layer (7) is formed by anti-corrosion material, described anti-corrosion material be selected from epoxy resin, polyurethane and phenolic resin one or more.
15. pipelines according to claim 1, wherein, the thickness of described anticorrosion antiwear liner (1) is 1-5mm, the thickness of described interior pipe (2) is 2-8mm, the thickness of described first heat insulation layer (3) is 0.5-3mm, the thickness of described second heat insulation layer (5) is 0.5-3mm, and the thickness of described outer tube (6) is 2-8mm, and the thickness of described external anti-corrosion layer (7) is 0.5-2mm.
16. 1 kinds of pipelines with box cupling, is characterized in that, the pipeline of described band box cupling comprises pipeline at least two claim 1-15 described in any one and at least one box cupling.
The pipeline of 17. band box cuplings according to claim 16, wherein, the outer surface of the end be connected with described box cupling of described pipeline has external thread structure (10), and described box cupling correspondingly has female thread structure, and the two is threaded togather.
The pipeline of 18. band box cuplings according to claim 17, wherein, the end be connected with described box cupling of described pipeline is provided with flared joint (17).
The pipeline of 19. band box cuplings according to claim 18, wherein, the inner side of described flared joint (17) is provided with antiseptic wearable coat (18); Preferably, described antiseptic wearable coat (18) is formed by anticorrosion antiwear resin, described anticorrosion antiwear resin be selected from ultra-high molecular weight polyethylene, polypropylene, teflon, perfluoroethylene-propylene copolymer and ethylene-chlorotrifluoro-ethylene copolymer one or more.
20. according to the pipeline of the band box cupling in claim 16-19 described in any one; wherein; described box cupling comprises bushing pipe (14), sealing layer, box cupling inner protective layer (13 '), box cupling thermal-protective coating (12) and box cupling external protection (13) from inside to outside successively, is provided with lining (15) and seal ring (16) in described sealing layer.
The box cupling of 21. band box cuplings according to claim 20; wherein; described box cupling thermal-protective coating (12) comprises the cavity structure be formed between box cupling inner protective layer (13 ') and box cupling external protection (13); be filled with in aerogel particle, air and inert gas in this cavity structure one or more, or vacuum.
CN201310499465.1A 2013-10-22 2013-10-22 Pipeline and pipeline with coupling Pending CN104565576A (en)

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CN108302284A (en) * 2018-02-06 2018-07-20 中国石油工程建设有限公司华北分公司 A kind of underground heat-insulated oil pipe and preparation method thereof
CN108456840A (en) * 2018-03-05 2018-08-28 苏州特鑫精密电子有限公司 A kind of handware high-strength wear-resistant alloy stick
CN109519640A (en) * 2018-12-03 2019-03-26 王子睿 Ventilation shaft attemperator and heat preserving method
CN109630033A (en) * 2018-11-20 2019-04-16 山东美生热能科技有限公司 Long-life insulated tubing and its manufacturing method
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CN115559671A (en) * 2022-11-04 2023-01-03 山东美生热能科技有限公司 Super 13Cr anticorrosive heat-insulating oil casing assembly
CN115926508A (en) * 2022-12-12 2023-04-07 浙江双金粉末涂料有限公司 Powder coating capable of reducing heat transfer and forming compact film and film forming method

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CN109519640A (en) * 2018-12-03 2019-03-26 王子睿 Ventilation shaft attemperator and heat preserving method
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CN110079195A (en) * 2019-05-24 2019-08-02 上海瀚岱化学有限公司 A kind of aqueous epoxy resins composition and its application
CN115559671A (en) * 2022-11-04 2023-01-03 山东美生热能科技有限公司 Super 13Cr anticorrosive heat-insulating oil casing assembly
CN115926508A (en) * 2022-12-12 2023-04-07 浙江双金粉末涂料有限公司 Powder coating capable of reducing heat transfer and forming compact film and film forming method
CN115926508B (en) * 2022-12-12 2023-09-19 浙江双金粉末涂料有限公司 Powder coating capable of reducing heat transfer and forming film compactly and film forming method

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Application publication date: 20150429