CN102514133A - Method for prefabricating marine composite polyurethane heat insulation pipelines - Google Patents
Method for prefabricating marine composite polyurethane heat insulation pipelines Download PDFInfo
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- CN102514133A CN102514133A CN2011103967910A CN201110396791A CN102514133A CN 102514133 A CN102514133 A CN 102514133A CN 2011103967910 A CN2011103967910 A CN 2011103967910A CN 201110396791 A CN201110396791 A CN 201110396791A CN 102514133 A CN102514133 A CN 102514133A
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 66
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 66
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 238000009413 insulation Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 27
- 238000000465 moulding Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 16
- 229920001228 polyisocyanate Polymers 0.000 claims description 13
- 239000005056 polyisocyanate Substances 0.000 claims description 13
- 229920000620 organic polymer Polymers 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000011325 microbead Substances 0.000 claims description 3
- 239000004005 microsphere Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003822 epoxy resin Substances 0.000 abstract 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 abstract 2
- 229920000647 polyepoxide Polymers 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 5
- 229920003225 polyurethane elastomer Polymers 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920005479 Lucite® Polymers 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
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Abstract
The invention discloses a method for prefabricating marine composite polyurethane heat insulation pipelines, which comprises the following steps of (1) performing shot blasting on the outer surface of a steel tube with derusting grade no smaller than Sa2.5; (2) preheating the steel tube to the temperature of 180-220 DEG C, clinkering epoxy resins through electrostatic spraying, and cooling the epoxy resins to form an anticorrosive coating with thickness of 300-500 mum; and (3) forming a composite polyurethane heat insulation layer through a mould forming device. Method for prefabricating the marine composite polyurethane heat insulation pipelines utilizes a machine to pour the composite polyurethane heat insulation layer, and is controllable in process, high in production efficiency and low in production cost.
Description
Technical field
The present invention relates to a kind of method for prefabricating of utilidor, particularly relate to a kind of method for prefabricating that is used for carrying the composite polyurethane utilidor of ocean deepwater environment crude oil or gas medium.
Background technology
To some crude oil, in the defeated process of pipe, when fluid temperature (F.T.) is reduced to certain value, can separate out HMW and low-molecular-weight wax component successively than high-consistency; Or under the long distances natural gas of high pressure condition, gas hydrates are separated out with the solid shape like loose ice.Their easy blocking pipelines, and in conveying equipment and oil tank, deposit easily, excessive deposition can influence the operate as normal of valve and instrument even cause the generation of production accident.
Generally adopt heat preservation technology at present, inject chemical agent technology and pigging technology and prevent the line clogging that hydrate and wax cause.Wherein heat preservation technology comprises heat-insulation layer, electrical heating (companion's heat) system or hot fluid.
In the development process in deep water hydrocarbon field, its big outer tube caliber of tube-in-tube type polyurethane utilidor that uses at present requires harsh to pipe laying barge.And outer steel pipe adopts thick walled steel tube more, and the steel consumption amount is big, because the steel sleeve outer surface need carry out heavy anti-corrosion paint, the corrosion-resistant expense is also higher.During installation at sea, need weld in addition to inside and outside steel pipe, 100% nondestructive inspection, great in constructing amount, pipelaying rate is slow, and efficient is lower, thereby the integrated engineering cost is higher.
Summary of the invention
The present invention provides a kind of ocean composite polyurethane utilidor method for prefabricating for solving the technical problem that exists in the known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of ocean composite polyurethane utilidor method for prefabricating may further comprise the steps:
One) outer surface of steel tube is carried out impeller blasting, derusting grade is not less than the Sa2.5 level;
Two) steel pipe is preheated to 180～220 ℃, through the electrostatic spraying clinkery epoxy powder, the cooling back forms anticorrosive coat, thickness 300～500 μ m of anticorrosive coat;
Three) adopt mould molding device moulding composite polyurethane heat-insulation layer:
This mould molding device comprises:
A) mould, the opposite opened semicircle mould that this mould is made up of upper die and lower die, said patrix and said counterdie are made up of mould steel, polyurethane insulation coating and stainless-steel sheet from inside to outside successively;
Said patrix most significant end is equipped with the blast pipe that communicates with mold cavity, and the least significant end of the bottom of said counterdie is equipped with the gate spool that communicates with mold cavity;
The land area of said patrix is provided with a plurality of conical dowel pins hole in the axial direction, is provided with a plurality of conical dowel pin axles corresponding to said conical dowel pin hole on the land area of said counterdie, and the land area of said counterdie is provided with the seal groove that sealing joint strip is installed;
Said patrix is connected with a plurality of die-sinking devices that are fixed on the rotation tilt stand in the axial direction, and said counterdie is installed on the said rotation tilt stand through gripper shoe, and is connected with a plurality of mold closing mechanisms that are fixed on the said rotation tilt stand in the axial direction;
Radial equipartition has many guide grooves between the mould steel of said mould and the polyurethane insulation coating; Be provided with the heat-conducting oil heating pipe of circulation in the said guide groove; The export and import of said heat-conducting oil heating pipe is connected to heating and temperature controlling device, and said heat-conducting oil heating pipe is relatively layout in groups at said patrix and said counterdie outside with its recycle oil flow path direction;
B) die-sinking device; This die-sinking device comprises that the bottom is fixed on the die sinking support on the said rotation tilt stand; Said die sinking cantilever tip is articulated in the middle part of die sinking rotary suspension arm; Said die sinking rotary suspension arm one end is fixed in the top of said patrix, and the other end is through being articulated in the die sinking cylinder ends, and said die sinking hydraulic cylinder bottom is articulated in the die sinking hydraulic cylinder bearing that is installed on the said rotation tilt stand;
C) mold closing mechanism; This mold closing mechanism comprises that the bottom is fixed on the matched moulds support on the said rotation tilt stand; Said matched moulds cantilever tip is articulated in the middle part of matched moulds rotation pressure arm; One end of said matched moulds rotation pressure arm is provided with clamping plane, and the other end is articulated in the matched moulds cylinder ends, and said closing liquid cylinder pressure bottom-hinged is in the closing liquid cylinder pressure bearing that is installed on the said rotation tilt stand;
D) rotation tilt stand, a bottom portion of this rotation tilt stand is connected in base through the inclination revolute;
E) base, this base is positioned over ground;
F) incline controller, this incline controller comprise the hydraulic tilt cylinder of bottom-hinged in said base middle part, and said hydraulic tilt cylinder end is articulated in said rotation tilt stand middle part;
G) Hydraulic Station, this Hydraulic Station are that said die sinking hydraulic cylinder, said closing liquid cylinder pressure and said hydraulic tilt cylinder provide power;
The raw material of moulding composite polyurethane heat-insulation layer is glass microballoon composite polyurethane raw material or organic polymer composite polyurethane raw material; Glass microballoon composite polyurethane raw material is two component liquid; Is that the PPG of the hollow glass microbead of 30～100 μ m is formed by the polyisocyanates component with adding diameter; Its ratio of quality and the number of copies is: polyisocyanates: PPG=1.0～1.2: 1.0, and glass microballoon accounts for 5～40% of PPG quality; Organic polymer composite polyurethane raw material is two component liquid; By aromatic polyisocyanate component (4; 4 '-MDI) is that the PPG of the polymeric hollow microsphere of 10～200 μ m is formed with adding diameter; Its ratio of quality and the number of copies is: polyisocyanates: PPG=1.0～1.2: 1.0, and the organic polymer microballoon accounts for 5～40% of PPG quality;
Adopt the method for mould molding device moulding composite polyurethane heat-insulation layer may further comprise the steps:
1) steel pipe 24 is preheated to 60～70 ℃;
2), and in forming process, continue to keep this temperature with mould and die preheating to 50～60 ℃;
3) steel pipe is hung in mould;
3.1) before steel pipe was gone into mould, the height that the heat-insulation layer support centering cushion block heat-insulation layer of the least significant end placement activity of inner chamber in the middle part of counterdie is axial supports the cushion block of feeling relieved equated with the insulation layer thickness of cast;
3.2) before steel pipe is gone into mould, two pipe end plugging block are contained in the steel pipe two ends respectively;
4) close die;
5) mould is tilted 15～30 °;
6) from gate spool cast composite polyurethane raw material;
7) when blast pipe has raw material to overflow, stop cast;
8) treat the after chemical reaction of composite polyurethane raw material, after the curing, mould is set level, die sinking, the lifting steel pipe goes out mould, obtains finished product-ocean composite polyurethane utilidor.
Advantage and good effect that the present invention has are: adopt machine cast composite polyurethane heat-insulation layer, technology is controlled, and production efficiency is high, and production cost is low.
Description of drawings
Fig. 1 is the front view of the mould molding device that adopts of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is a mould matched moulds operating position sketch map;
Fig. 4 is a mould die sinking operating position sketch map;
Fig. 5 is the sketch map of the mould molding device that adopts of the present invention in the cast operating position;
Fig. 6 is the sketch map behind the mould matched moulds of the mould molding device that adopts of the present invention.
Among the figure: 1, patrix, 2, counterdie, 3, die-sinking device, 301, the die sinking rotary suspension arm, 302, the die sinking support, 303, the die sinking hydraulic cylinder; 304, die sinking hydraulic cylinder bearing, 4, mold closing mechanism, 401, matched moulds rotation pressure arm, 402, the matched moulds support, 403, the closing liquid cylinder pressure, 404, closing liquid cylinder pressure bearing; 5, incline controller, 6, the rotation tilt stand, 7, base, 8, the inclination revolute, 9, Hydraulic Station, 10, heating and temperature controlling device; 11, heat-conducting oil heating pipe, 12, the electric block bracing frame, 13, electric block, 14, hanger, 15, gate spool, 16, blast pipe; 17, flange, 18, the matched moulds adjusting device, 19, gripper shoe, 20, sealing joint strip, 21, the conical dowel pin hole, 22, the conical dowel pin axle; 23, heat-insulation layer supports the centering cushion block, and 24, steel pipe, 25, anticorrosive coat, 26, mold cavity, 27, the pipe end plugging block.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, the following examples of giving an example now, and conjunction with figs. specifies as follows:
A kind of ocean composite polyurethane utilidor method for prefabricating may further comprise the steps:
One) outer surface of steel tube is carried out impeller blasting, derusting grade is not less than the Sa2.5 level;
Two) steel pipe is preheated to 180～220 ℃, through electrostatic spraying clinkery epoxy powder (FBE), the cooling back forms anticorrosive coat 25, thickness 300～500 μ m of anticorrosive coat;
Three) adopt mould molding device moulding composite polyurethane heat-insulation layer:
Above-mentioned mould molding device has carried out detailed elaboration in number of patent application is 201110249740.5 patent application; See also Fig. 1～Fig. 6, it is made up of mould, die-sinking device 3, mold closing mechanism 4, rotation tilt stand 6, base 7, incline controller 5, Hydraulic Station 9, heating and temperature controlling device 10 etc.
As shown in Figure 1, the mould total length in the present embodiment is 12.5 meters, the opposite opened semicircle mould of being made up of patrix 1 and counterdie 2.Mould is by the mould steel manufacturing, the outside coated with polyurethane insulation material of mould steel, polyurethane insulation coating external packets coating stainless steel steel plate.
As shown in Figure 2, mould is made up of three sections assemblies in the axial direction equably, connects through flange 17 between per two sections patrix 1 assemblies, connects through flange 17 between per two sections counterdie 2 assemblies.Patrix 1 is separately installed with three cover heat-conducting oil heating pipes 11 with counterdie 2 outsides, and promptly each section patrix 1 assembly and each section counterdie 2 assemblies are corresponding respectively is equipped with a cover heat-conducting oil heating pipe 11.The hot oil inlet and the hot oil outlet of every suit heat-conducting oil heating pipe 11 all are connected in heating and temperature controlling device 10.Heat-conducting oil heating pipe 11 is according to managing interior recycle oil flow path direction in groups in patrix 1 disposed outside; The recycle oil flow path direction of two heat-conducting oil heating pipes 11 of each group is relative; Likewise, heat-conducting oil heating pipe 11 also is relatively layout in groups with its recycle oil flow path direction in counterdie 2 outsides.
The Surface Machining of patrix 1 and counterdie 2 and the guide groove of heat-conducting oil heating pipe 11 equal diameters, to being arranged in parallel along circumference, guide groove is 14 to guide groove in the present embodiment along mould shaft, respectively 7 of patrix 1, counterdies 2.
The method that heating and temperature controlling device 10 adopts control conduction oil EGRs to import and export conduction oil temperature is controlled the size of heating power, thereby realizes the interior temperature controlling of mould, and its temperature-controlled precision should be ± and 2 ℃.Heating and temperature controlling device 10 can heat mould before cast; And after casting complete, during PPG and the isocyanate reaction heat release mould is cooled off; After PPG and isocyanate reaction heat release completion, heat, maintain the level that composite polyurethane elastic body heat preservation layer process requires with the solidification temperature of controlling the polyurethane insulation coating of pouring into a mould.
Heat-conducting oil heating pipe 11 subtends are arranged, have reduced the temperature difference at turnover mould heat-conducting oil heating pipe 11 two ends, and the bulk temperature of mould is reached unanimity, and the polyurethane elastomer insulation material curing quality in the casting mold reaches unanimity simultaneously.
In conjunction with Fig. 3 and shown in Figure 4, counterdie 2 is fixed by bolts on the rotation tilt stand 6 through axially going up the some gripper shoes 19 that are provided with.Rotation tilt stand 6 both sides are equipped with several die-sinking devices 3 and several mold closing mechanisms 4; Die-sinking device 3 is arranged and is fixedly connected with patrix 2 tops at the mould homonymy, and mold closing mechanism 4 all has layout and can apply clamping force at the matched moulds place of patrix 1 and counterdie 2 in the mould both sides.
Particularly, as shown in Figure 4, die-sinking device 3 mainly is made up of die sinking rotary suspension arm 301, die sinking support 302, die sinking hydraulic cylinder 303, die sinking hydraulic cylinder bearing 304.The bottom of die sinking support 302 is fixed on the rotation tilt stand 6, and the middle part of the top of die sinking support 302 and die sinking rotary suspension arm 301 interconnects through rotating shaft.The upper end of die sinking rotary suspension arm 301 is fixedly connected with the otic placode that is welded on patrix 1 top, and lower end and die sinking hydraulic cylinder 303 ends interconnect through rotating shaft.The bottom of die sinking hydraulic cylinder 303 and die sinking hydraulic cylinder bearing 304 interconnect through rotating shaft, and die sinking hydraulic cylinder bearing 304 is fixedly welded on the rotation tilt stand 6.Die sinking hydraulic cylinder 303 provides power by Hydraulic Station 9, regulates the piston rod overhang of die sinking hydraulic cylinder 303, can drive 301 related patrix 1 motions of die sinking rotary suspension arm, thereby realizes the folding of mould.
Matched moulds adjusting device 18 also is installed on the part die-sinking device 3, matched moulds adjusting device 18 be by leading screw with the screw pair that female sleeve pipe constitutes is set, can be flexible through screwing.One end of matched moulds adjusting device 18 is connected in the die sinking rotary suspension arm 301 of die-sinking device 3, and the other end is connected in patrix 1 top.On entire die, matched moulds adjusting device 18 is provided with four at least, is used to realize patrix 1 and the fine setting of counterdie 2 when matched moulds.
As shown in Figure 3, mold closing mechanism 4 mainly is made up of matched moulds rotation pressure arm 401, matched moulds support 402, closing liquid cylinder pressure 403, closing liquid cylinder pressure bearing 404.The bottom of matched moulds support 402 is fixed on the rotation tilt stand 6, and the middle part of the top of matched moulds support 402 and matched moulds rotation pressure arm 401 interconnects through rotating shaft.One end of matched moulds rotation pressure arm 401 is provided with clamping plane, and clamping plane can be pressed in the junction of patrix 1 and counterdie 2 behind the mould matched moulds; The other end and closing liquid cylinder pressure 403 ends of matched moulds rotation pressure arm 401 interconnect through rotating shaft.The bottom of closing liquid cylinder pressure 403 and closing liquid cylinder pressure bearing 404 interconnect through rotating shaft, and closing liquid cylinder pressure bearing 404 is fixedly welded on the rotation tilt stand 6.Closing liquid cylinder pressure 403 provides power by Hydraulic Station 9, regulates the piston rod overhang of closing liquid cylinder pressure 403, can drive 401 motions of matched moulds rotation pressure arm, and during matched moulds, the clamping plane of matched moulds rotation pressure arm 401 compresses patrix and realizes sealed to mould; During die sinking, matched moulds rotation pressure arm 401 opens for die-sinking device 3 patrix 1 of slinging provides necessary condition.
On Fig. 3 and Fig. 4, can also see; The land area of patrix 1 is provided with conical dowel pin hole 21; Conical dowel pin hole 21 is provided with a plurality of along the axial direction of patrix 1, position and size corresponding to conical dowel pin hole 21 on the land area of counterdie 2 are equipped with the conical dowel pin axle 22 that matches.Cooperate grafting through conical dowel pin axle 22 with conical dowel pin hole 21, guarantee patrix 1 and the accurate location of counterdie 2 when matched moulds.
Also be processed with seal groove on the land area of counterdie 2, seal groove is generally dovetail groove, and columniform sealing joint strip 20 is installed in the seal groove.The effect of sealing joint strip 20 is to guarantee patrix 1 and the sealing of counterdie 2 when matched moulds, produces when preventing to pour into a mould to leak the material phenomenon, thereby prevents to cause the surface of composite polyurethane elastic body heat preservation layer defective to occur.
As shown in Figure 6, at the most significant end of patrix 1 blast pipe 16 is installed, blast pipe 16 communicates with mold cavity 16, and the bottom of blast pipe 16 is preferably bullet, and this is the smooth demoulding of accomplishing rear exhaust port for moulding by casting.Least significant end in the bottom of counterdie 2 is equipped with gate spool 15, and gate spool 15 communicates with mold cavity 26, and is used for connecting the cast flexible pipe.
Dies cavity spraying polytetrafluorethylecoatings coatings is good; Owing to have repellency between polytetrafluorethylecoatings coatings and the polyurethane material; The deep underwater pipes polyurethane elastomer heat-insulation layer product of producing need not to use releasing agent at dies cavity, and surface quality of products also significantly improves.
As shown in Figure 5, above-mentioned rotation tilt stand 6 is welded by shaped steel, and rotation tilt stand 6 one bottom portions are connected in through inclination revolute 8 and are positioned over ground base 7, and base 7 is welded to form by square steel tube.Inclination revolute 8 is made up of the otic placode that is arranged at rotation tilt stand 6 ends, the otic placode and the rotating shaft that are arranged at base 7 ends.Rotation tilt stand 6 is controlled by incline controller 5 with respect to the inclination of base 7; This incline controller 5 comprises the hydraulic tilt cylinder of bottom-hinged in base 7 middle parts; The hydraulic tilt cylinder end is articulated in the middle part of rotation tilt stand 6, and hydraulic tilt cylinder provides power by Hydraulic Station 9.Rotation tilt stand 6 under the effect of hydraulic tilt cylinder around inclination revolute 8 rotation, and and said base between angle be 0～30 °, therefore pouring into a mould angle of regulation range also is 0～30 °.
Air when mould tilts can make cast in the mold cavity 26 is discharged smoothly from bottom to up.Less when the viscosity of polyurethane elastomer insulation material of cast, mobile better the time, smaller value can be got in the angle of inclination of die casting; When the viscosity of the polyurethane elastomer insulation material of cast was big, higher value will be got in the angle of inclination of die casting, to guarantee the smooth exhaust of polyurethane elastomer insulation material of cast, reduces the pouring defect of the air bubble class in the heat-insulation layer.
The top of rotation tilt stand 6 other ends is provided with hanger 14, and in this end arranged outside the electric block bracing frame 12 that is welded to form by shaped steel is arranged.The top of electric block bracing frame 12 is equipped with suspension ring, and suspension ring are connected with electric block 13, and the suspension hook of electric block 13 hangs the hanger 14 that rotates tilt stand 6 ends, and rotation tilt stand 6 is played auxiliary protection function.Rotate to 30 ° of maximum angles when rotating tilt stand 6, the suspension centre of electric block 13 also is elevated to the extreme higher position.
The raw material of moulding composite polyurethane heat-insulation layer is glass microballoon composite polyurethane raw material or organic polymer composite polyurethane raw material.Glass microballoon composite polyurethane raw material is two component liquid; Is that the PPG of the hollow glass microbead of 30～100 μ m is formed by the polyisocyanates component with adding diameter; Under the effect of catalyst and various auxiliary agents, after chemical reaction generates the glass microballoon composite polyurethane material; Its raw materials quality portion rate is: polyisocyanates: PPG=1.0～1.2: 1.0, and the lucite microballon accounts for 5～40% of PPG quality.Adopt insulating tube maximum water depth applicatory that this glass microballoon composite polyurethane material processes about 3000m, long-term maximum serviceability temperature is 100 ℃.The glass microballoon composite polyurethane raw material that is used for deepwater regions is offshore company and produces; Polyisocyanates component and PPG can be the Hyperlast Syntactic DW-512 of DOW company or the ELASTOSHORE 100100R/5000 of BASF AG; The S32 that hollow glass micropearl adopts 3M company to produce more; S35, the S38 series of products.Glass microballoon silane coupling agents that adopt before filling carry out surface modification more, and coupling agent can be the ethanol water of KH-550.
Organic polymer composite polyurethane raw material is two component liquid; By aromatic polyisocyanate component (4; 4 '-MDI) is that the PPG of the polymeric hollow microsphere of 10～200 μ m is formed with adding diameter; Under the effect of catalyst and various auxiliary agents, after chemical reaction generates organic polymer microballoon composite polyurethane material; Its raw materials quality portion rate is: polyisocyanates: PPG=1.0～1.2: 1.0, and the organic polymer microballoon accounts for 5～40% of PPG quality.Adopt insulating tube maximum water depth applicatory that this organic polymer microballoon composite polyurethane material processes about 250m, long-term maximum serviceability temperature is 100 ℃.The organic polymer composite polyurethane raw material that is used for submarine pipeline is the Hyperlast Syntactic 512E of DOW company.
Adopt the method for mould molding device moulding composite polyurethane heat-insulation layer may further comprise the steps:
1) steel pipe 24 is preheated to 60～70 ℃;
2), and in forming process, continue to keep this temperature with mould and die preheating to 50～60 ℃;
3) steel pipe is hung in mould;
3.1) before steel pipe 24 is gone into mould; At the axial intermediate point of counterdie and on apart from each position of 2 meters of intermediate point; The heat-insulation layer that is respectively arranged with an activity in the following least significant end of mold cavity supports centering cushion block 23, and the height that heat-insulation layer supports centering cushion block 23 equates with the insulation layer thickness of cast.The effect that heat-insulation layer supports centering cushion block 23 is to prevent to pour into a mould heat-insulation layer off-centre to occur, to guarantee the insulation layer thickness uniformity of cast.
3.2) before steel pipe 24 is gone into mould, two pipe end plugging block 27 being contained in the steel pipe two ends respectively, behind the matched moulds, two pipe end plugging block 27 and mould form the annular space of moulding composite polyurethane heat-insulation layer jointly, see also Fig. 6.
4) close die;
5) mould is tilted 15～30 °;
6) from gate spool 15 cast composite polyurethane raw materials;
7) when blast pipe has raw material to overflow, stop cast;
In above-mentioned casting process, mould keeps constant temperature.
8) treat the after chemical reaction of composite polyurethane raw material, after the curing, mould is set level, die sinking, lifting steel pipe 24 goes out mould, obtains finished product-ocean composite polyurethane utilidor.
Adopt glass microballoon composite polyurethane raw material, the ocean composite polyurethane utilidor that adopts above-mentioned method for prefabricating to form in the patent No. is: carried out detailed elaboration in 201010249740.5 the Chinese utility model patent.
Although combine accompanying drawing that the preferred embodiments of the present invention are described above; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (5)
1. an ocean composite polyurethane utilidor method for prefabricating is characterized in that, may further comprise the steps:
One) outer surface of steel tube is carried out impeller blasting, derusting grade is not less than the Sa2.5 level;
Two) steel pipe is preheated to 180～220 ℃, through the electrostatic spraying clinkery epoxy powder, the cooling back forms anticorrosive coat, thickness 300～500 μ m of anticorrosive coat;
Three) adopt mould molding device moulding composite polyurethane heat-insulation layer:
This mould molding device comprises:
A) mould, the opposite opened semicircle mould that this mould is made up of upper die and lower die, said patrix and said counterdie are made up of mould steel, polyurethane insulation coating and stainless-steel sheet from inside to outside successively;
Said patrix most significant end is equipped with the blast pipe that communicates with mold cavity, and the least significant end of the bottom of said counterdie is equipped with the gate spool that communicates with mold cavity;
The land area of said patrix is provided with a plurality of conical dowel pins hole in the axial direction, is provided with a plurality of conical dowel pin axles corresponding to said conical dowel pin hole on the land area of said counterdie, and the land area of said counterdie is provided with the seal groove that sealing joint strip is installed;
Said patrix is connected with a plurality of die-sinking devices that are fixed on the rotation tilt stand in the axial direction, and said counterdie is installed on the said rotation tilt stand through gripper shoe, and is connected with a plurality of mold closing mechanisms that are fixed on the said rotation tilt stand in the axial direction;
Radial equipartition has many guide grooves between the mould steel of said mould and the polyurethane insulation coating; Be provided with the heat-conducting oil heating pipe of circulation in the said guide groove; The export and import of said heat-conducting oil heating pipe is connected to heating and temperature controlling device, and said heat-conducting oil heating pipe is relatively layout in groups at said patrix and said counterdie outside with its recycle oil flow path direction;
B) die-sinking device; This die-sinking device comprises that the bottom is fixed on the die sinking support on the said rotation tilt stand; Said die sinking cantilever tip is articulated in the middle part of die sinking rotary suspension arm; Said die sinking rotary suspension arm one end is fixed in the top of said patrix, and the other end is through being articulated in the die sinking cylinder ends, and said die sinking hydraulic cylinder bottom is articulated in the die sinking hydraulic cylinder bearing that is installed on the said rotation tilt stand;
C) mold closing mechanism; This mold closing mechanism comprises that the bottom is fixed on the matched moulds support on the said rotation tilt stand; Said matched moulds cantilever tip is articulated in the middle part of matched moulds rotation pressure arm; One end of said matched moulds rotation pressure arm is provided with clamping plane, and the other end is articulated in the matched moulds cylinder ends, and said closing liquid cylinder pressure bottom-hinged is in the closing liquid cylinder pressure bearing that is installed on the said rotation tilt stand;
D) rotation tilt stand, a bottom portion of this rotation tilt stand is connected in base through the inclination revolute;
E) base, this base is positioned over ground;
F) incline controller, this incline controller comprise the hydraulic tilt cylinder of bottom-hinged in said base middle part, and said hydraulic tilt cylinder end is articulated in said rotation tilt stand middle part;
G) Hydraulic Station, this Hydraulic Station are that said die sinking hydraulic cylinder, said closing liquid cylinder pressure and said hydraulic tilt cylinder provide power;
The raw material of moulding composite polyurethane heat-insulation layer is glass microballoon composite polyurethane raw material or organic polymer composite polyurethane raw material; Glass microballoon composite polyurethane raw material is two component liquid; Is that the PPG of the hollow glass microbead of 30～100 μ m is formed by the polyisocyanates component with adding diameter; Its ratio of quality and the number of copies is: polyisocyanates: PPG=1.0～1.2: 1.0, and glass microballoon accounts for 5～40% of PPG quality; Organic polymer composite polyurethane raw material is two component liquid; By aromatic polyisocyanate component (4; 4 '-MDI) is that the PPG of the polymeric hollow microsphere of 10～200 μ m is formed with adding diameter; Its ratio of quality and the number of copies is: polyisocyanates: PPG=1.0～1.2: 1.0, and the organic polymer microballoon accounts for 5～40% of PPG quality;
Adopt the method for mould molding device moulding composite polyurethane heat-insulation layer may further comprise the steps:
1) steel pipe 24 is preheated to 60～70 ℃;
2), and in forming process, continue to keep this temperature with mould and die preheating to 50～60 ℃;
3) steel pipe is hung in mould;
3.1) before steel pipe was gone into mould, the height that the heat-insulation layer support centering cushion block heat-insulation layer of the least significant end placement activity of inner chamber in the middle part of counterdie is axial supports the cushion block of feeling relieved equated with the insulation layer thickness of cast;
3.2) before steel pipe is gone into mould, two pipe end plugging block are contained in the steel pipe two ends respectively;
4) close die;
5) mould is tilted 15～30 °;
6) from gate spool cast composite polyurethane raw material;
7) when blast pipe has raw material to overflow, stop cast;
8) treat the after chemical reaction of composite polyurethane raw material, after the curing, mould is set level, die sinking, the lifting steel pipe goes out mould, obtains finished product-ocean composite polyurethane utilidor.
2. ocean according to claim 1 composite polyurethane utilidor method for prefabricating; It is characterized in that; Said patrix and said counterdie are made up of three sections assemblies in the axial direction equably; Connect through flange between per two sections upper die components, connect through flange between per two sections following membrane modules, the mould steel of every section upper die component mould steel outside outside and every section following membrane module is separately installed with one group of said heat-conducting oil heating pipe that is connected in said heating and temperature controlling device.
3. ocean according to claim 1 composite polyurethane utilidor method for prefabricating is characterized in that said dies cavity is coated with polytetrafluorethylecoatings coatings.
4. ocean according to claim 1 composite polyurethane utilidor method for prefabricating is characterized in that said exhaust pipe lower part is a bullet.
5. ocean according to claim 1 composite polyurethane utilidor method for prefabricating; It is characterized in that; The top of the said rotation tilt stand other end is provided with hanger; Said hanger is used to connect the suspension hook of electric block, and said electric block is installed on the top of electric block bracing frame through suspension ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103967910A CN102514133A (en) | 2011-12-02 | 2011-12-02 | Method for prefabricating marine composite polyurethane heat insulation pipelines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103967910A CN102514133A (en) | 2011-12-02 | 2011-12-02 | Method for prefabricating marine composite polyurethane heat insulation pipelines |
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| CN2011103967910A Pending CN102514133A (en) | 2011-12-02 | 2011-12-02 | Method for prefabricating marine composite polyurethane heat insulation pipelines |
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| CN103527865A (en) * | 2012-11-14 | 2014-01-22 | 溧阳市金龙涂塑防腐有限公司 | Preparing process of plastic-coated steel tube |
| CN104089148A (en) * | 2014-05-29 | 2014-10-08 | 成都建筑工程集团总公司 | Heat-preservation die and heat-preservation construction method for ultra-low temperature pipeline |
| CN104260270A (en) * | 2014-09-12 | 2015-01-07 | 北京豪特耐管道设备有限公司 | Forming mould of thermal-insulation layer of thermal-insulation pipeline |
| CN104309048A (en) * | 2014-09-12 | 2015-01-28 | 北京豪特耐管道设备有限公司 | Method for preparing heat-insulation pipe by films |
| CN104454238A (en) * | 2014-11-19 | 2015-03-25 | 成都建筑工程集团总公司 | Pipeline installation construction method for rocket RP-1 propellant feed system |
| CN104890167A (en) * | 2015-05-28 | 2015-09-09 | 南京皓威机械有限公司 | Thermal insulating pipeline casting mould |
| CN105679468B (en) * | 2016-03-25 | 2018-07-06 | 江苏神马电力股份有限公司 | The insulator of internal filled polyurethane and filling polyurethane method |
| CN109323083A (en) * | 2018-10-30 | 2019-02-12 | 中投（天津）热力股份有限公司 | A kind of efficient, durable heat-insulation pipe manufacturing process |
| CN110405988A (en) * | 2019-08-02 | 2019-11-05 | 江苏神马电力股份有限公司 | The method of bellow mold and its external mold, production bellows |
| CN114474757A (en) * | 2022-03-18 | 2022-05-13 | 天津太合节能科技有限公司 | Heat preservation pipe end cover and be used for plugging machine with adjustable central height of this end cover |
| CN116494453A (en) * | 2023-06-30 | 2023-07-28 | 天津爱思达航天科技股份有限公司 | Mold and method for casting polyurethane foam layer of cylinder |
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| CN103527865A (en) * | 2012-11-14 | 2014-01-22 | 溧阳市金龙涂塑防腐有限公司 | Preparing process of plastic-coated steel tube |
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| CN104089148B (en) * | 2014-05-29 | 2017-01-25 | 成都建筑工程集团总公司 | Heat-preservation die and heat-preservation construction method for ultra-low temperature pipeline |
| CN104309048A (en) * | 2014-09-12 | 2015-01-28 | 北京豪特耐管道设备有限公司 | Method for preparing heat-insulation pipe by films |
| CN104260270A (en) * | 2014-09-12 | 2015-01-07 | 北京豪特耐管道设备有限公司 | Forming mould of thermal-insulation layer of thermal-insulation pipeline |
| CN104309048B (en) * | 2014-09-12 | 2017-04-05 | 北京豪特耐管道设备有限公司 | A kind of method of use thin film fabrication insulated piping |
| CN104454238A (en) * | 2014-11-19 | 2015-03-25 | 成都建筑工程集团总公司 | Pipeline installation construction method for rocket RP-1 propellant feed system |
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| CN105679468B (en) * | 2016-03-25 | 2018-07-06 | 江苏神马电力股份有限公司 | The insulator of internal filled polyurethane and filling polyurethane method |
| CN109323083A (en) * | 2018-10-30 | 2019-02-12 | 中投（天津）热力股份有限公司 | A kind of efficient, durable heat-insulation pipe manufacturing process |
| CN110405988A (en) * | 2019-08-02 | 2019-11-05 | 江苏神马电力股份有限公司 | The method of bellow mold and its external mold, production bellows |
| CN110405988B (en) * | 2019-08-02 | 2021-05-18 | 江苏神马电力股份有限公司 | Corrugated pipe die, outer die thereof and method for manufacturing corrugated pipe |
| CN114474757A (en) * | 2022-03-18 | 2022-05-13 | 天津太合节能科技有限公司 | Heat preservation pipe end cover and be used for plugging machine with adjustable central height of this end cover |
| CN116494453A (en) * | 2023-06-30 | 2023-07-28 | 天津爱思达航天科技股份有限公司 | Mold and method for casting polyurethane foam layer of cylinder |
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Application publication date: 20120627 |