CN201651667U - Tube assembly of steel pipeline polyolefin anticorrosive coating repaired mouth - Google Patents
Tube assembly of steel pipeline polyolefin anticorrosive coating repaired mouth Download PDFInfo
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- CN201651667U CN201651667U CN2009201679673U CN200920167967U CN201651667U CN 201651667 U CN201651667 U CN 201651667U CN 2009201679673 U CN2009201679673 U CN 2009201679673U CN 200920167967 U CN200920167967 U CN 200920167967U CN 201651667 U CN201651667 U CN 201651667U
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- anticorrosive coat
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- steel pipe
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Abstract
The utility model provides a tube assembly of a steel pipeline polyolefin anticorrosive coating repaired mouth, which comprises a steel pipeline, polyolefin anticorrosive coatings arranged outside the steel pipeline, a fiber reinforced composite wrapped on the area of the repaired mouth between the polyolefin anticorrosive coatings, and anticorrosive material wrapped outside the fiber reinforced composite. The assembly can be used for the connecting part of the steel pipeline polyolefin anticorrosive coating and also can be used for the connecting part of the anticorrosive coatings of other devices or subsidiary facilities. The utility model provides the repaired mouth which is simple, practicable, reliable and effective to use.
Description
Technical field
The utility model relates to the conduit assembly that is used for the pipeline anticorrosion coating repaired mouth, and specifically, this assembly can also can be the connection part of the anticorrosive coat of other equipment or affiliated facility at the connection part of steel pipe polyolefin anticorrosive coat.The utility model relates to the product of steel pipe polyolefin anticorrosive coating repaired mouth and implements the method for this assembly.
Technical background
Long defeated steel pipe adopts 3 strata alkene as anticorrosive coat with burying at present mostly, and this is comparatively ideal anticorrosion mode, is widely used in the long distance pipeline engineering.The pipeline that has applied anticorrosive coat in shop-fabricated adopts welding manner to couple together at the scene, and the painting anticorrosion to the welding part is called repaired mouth.This is the general meaning of repaired mouth.Repaired mouth described in the utility model also comprises to be mended wound, repairs damaged or defective anticorrosive coat.The position of repaired mouth is the connection part of steel polyolefin anticorrosive coat pipeline, also is the important step that guarantees the pipeline corrosion protection integrity, also is the weakest link of whole piece pipeline anticorrosion coating quality simultaneously.The patch technology of 3 strata alkene anti-corrosion pipelines still adopts shrink belt cover or liquid epoxy coating heat shrink band (cover) dual mode at present, and is promptly first at steel tube surface application of liquid epoxy primer, more bonding shrink belt outside it.Two positions of the bonding covering of shrink belt, the one, bonding with epoxy primer; Another place is bonding with the polyolefin (PE) of anticorrosive coat.
For the joint coating on pipeline position, be difficult to guarantee that preheating temperature can reach predetermined temperature equably, these two kinds of repaired mouth modes can not make repaired mouth position anticorrosive coat and the clinkering of body anticorrosive coat together, under the effect of temperature and soil stress, the bonding destruction of repaired mouth position anticorrosive coat and body and defective occurs, the requirement that makes repaired mouth position antiseptic effect not reach 3 strata alkene anticorrosive coats causes the whole anticorrosion grade of pipeline to reduce.Exactly because shrink belt the time needs heating in construction, because the restriction of field condition restriction or workmen's construction level, can cause just that the shrink belt heating is inhomogeneous, fold is many, under effects such as soil stress, cause shrink belt to break, seriously corroded.The shrink belt breakage can cause shelling, very easily makes aggressive medium be immersed in steel tube surface, thereby the heavy corrosion of steel pipe takes place.
Be primarily aimed at the connection part of steel pipe polyolefin anticorrosive coat though should be appreciated that the utility model.But said repaired mouth never only limits to the connection part of steel pipe polyolefin anticorrosive coat in the utility model, and it also can be the connection part of the anticorrosive coat of other equipment or affiliated facility.
The model utility content
The purpose of this utility model provides a kind of simple and feasible, reliable and effective repaired mouth product and method, solve in the prior art restriction because of material property, field condition restriction or workmen's construction level, cause existing opening-supplementing material to break easily, shell, and then cause the serious problems of corrosive pipeline.Said repaired mouth is the implication of broad sense in the utility model, and it comprises mends wound or reparation to damaged or defective anticorrosive coat.The zone of the repaired mouth described in the utility model is meant the exposed steel pipe in the middle of the polyolefin anticorrosive coat and the polyolefin anticorrosive coat of the optional certain-length adjacent with exposed steel pipe, promptly needs to carry out the zone of repaired mouth.
The utility model provides a kind of method of repaired mouth of steel pipe polyolefin anticorrosive coat, and this method comprises the steps:
(1) the regional covered fiber reinforced composite of the repaired mouth between steel pipe polyolefin anticorrosive coat;
(2) coat anti-corrosion material in the outside of fibre reinforced composites;
Wherein the zone of repaired mouth comprises the exposed steel pipe zone between the polyolefin anticorrosive coat and the polyolefin anticorrosive coat zone of the optional certain-length adjacent with exposed steel pipe.
Preferably, step (1) also comprises the steps: surface treatment is carried out to improve interface binding power in exposed steel pipe zone before.
Preferably, the surface-treated method comprises one or more in oil removing, rust cleaning, phosphatization, coupling agent coupling and the passivation.
Preferably, the length of the fibre reinforced composites that use in the step (1) extend to described polyolefin anticorrosive coat above, fibre reinforced composites and the certain size of described polyolefin anticorrosive coat overlap joint, the i.e. fibre reinforced composites of coating certain-length on the described polyolefin anticorrosive coat zone adjacent with described exposed steel pipe.
Preferably, the mode of the middle covered fiber reinforced composite of step (1) is any one in the following mode:
At first twine fibre reinforced composites, twine fibre reinforced composites in two side portions then at intermediate portion;
At first twine fibre reinforced composites at intermediate portion, twine fibre reinforced composites in two side portions then, the fibre reinforced composites part that is wrapped on the two side portions overlaps with the fibre reinforced composites that twine at intermediate portion;
Twine fibre reinforced composites from a side direction opposite side.
Preferably, on the described polyolefin anticorrosive coat zone adjacent, want to carry out following steps in the zone of covered fiber reinforced composite: on described polyolefin anticorrosive coat, apply adhesive with described exposed steel pipe; Carry out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length then with described exposed steel pipe.
Preferably, also comprise the steps: described polyolefin anticorrosive coat is carried out surface treatment before the top covered fiber reinforced composite of polyolefin anticorrosive coat, to improve interface binding power.
Preferably, described surface treatment comprises one or more the combination in corona treatment, flame treatment, chemical pretreatment solution processing, plasma treatment, polycrystalline coring, surface grafting method, heating, hacking, the coupling agent coupling.
Preferably, carry out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length immediately after on described polyolefin anticorrosive coat, applying adhesive with described exposed steel pipe, or carrying out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length behind the adhesive surface drying, or after doing solid work, adhesive carries out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length with described exposed steel pipe with described exposed steel pipe.
Preferably, the length of the anti-corrosion material that coats in the outside of fibre reinforced composites is that a) length with fibre reinforced composites is identical, perhaps b) extend to described polyolefin anticorrosive coat above, anti-corrosion material and described polyolefin anticorrosive coat overlap certain size, also coat the anti-corrosion material of certain-length above the promptly described polyolefin anticorrosive coat.
Preferably, the anti-corrosion material of coating certain-length comprises the steps: on fibre reinforced composites and above the described polyolefin anticorrosive coat
1) on fibre reinforced composites surface or the surface-coated adhesive of described polyolefin anticorrosive coat;
2) coat anti-corrosion material in the adhesive outside.
Preferably, before coating described anti-corrosion material, also comprise the steps: fibre reinforced composites or described polyolefin anticorrosive coat are carried out surface treatment to improve interface binding power.
Preferably, described surface treatment comprises one or several the combination in hacking, oil removing, coupling agent coupling, corona treatment, flame treatment, chemical pretreatment solution processing, plasma treatment, polycrystalline coring, the surface grafting method.
Preferably, step 2) after step 1), carry out immediately, or behind the adhesive surface drying, coat anti-corrosion material, or do solid work back coating anti-corrosion material at adhesive.
Preferably, adhesive comprises hot melt adhesive, acrylic (modified acrylic acid) adhesive, polyurethanes adhesive, preferred hot melt adhesive.
Preferably, hot melt adhesive comprises ethene-vinyl acetate copolymerization build (being called for short the EVA type) hot melt adhesive, ethene improved-the vinyl acetate copolymer type (being called for short the modified EVA type) hot melt adhesive, polyamide-based (PA) hot melt adhesive, polyester type (PET) hot melt adhesive, polyurethane (PU) type hot melt adhesive, thermoplastic elastomer (TPE) (SDS) type hot melt adhesive.
Preferably, step (2) further may further comprise the steps: after the anti-corrosion material that will not heat coats and finishes, paste Stamping Steel Ribbon on the anti-corrosion material both sides, again sealing film is bonded on the Stamping Steel Ribbon, whole repaired mouth position is sealed, vacuumize with vacuum pump, the repaired mouth position is compressed, begin to heat the repaired mouth position afterwards.
Preferably, the step at heating repaired mouth position is that the temperature that temperature arrives the hot melt adhesive fusing and can overflow from the edge is removed Electric heating appliance with Electric heating appliance heating repaired mouth position, begin to vacuumize, catch up with air simultaneously the anti-corrosion material surface to be flattened to both sides while vacuumizing; Repaired mouth position natural cooling, cooling procedure continues to catch up with the pressure air, follows the interruption exhaust, up to the complete cooling curing of described anti-corrosion material.
Preferably, described Electric heating appliance is any in heating tape, heater band, heating resistance collar, Frequency Induction Heating and the Far-infrared Heating device.
Preferably, the method for covered fiber reinforced composite is that wet method is laid in the step (1), and the step that wherein said wet method is laid comprises:
(A) needing the region surface brushing curable polymer of repaired mouth;
(B) lay fiber, and roll extrusion, make curable polymer evenly flood described fiber;
Randomly repeat (A) and (B) repeatedly, be cured then.
Preferably, the method for covered fiber reinforced composite comprises the dry method laying in the step (1), and the step that wherein said dry method is laid comprises:
(A) at fiber surface dip-coating curable polymer, make the fiber prepreg;
(B) need the zone of repaired mouth to lay the fiber prepreg that one or more layers step (A) obtains, be cured then.
Preferably, described fibre reinforced composites comprise one or more in glass fibre reinforced composion, basalt fibre reinforcing composite material, carbon fibre reinforced composite, aramid fibre reinforced composite, ultrahigh molecular weight polyolefin fibers reinforced composite and the boron fibre reinforced composite.
Preferably, described fiber is a continuous fiber, be selected from unidirectional fibre, quadrature or oblique no latitude cloth lamination, two-dimensional fabric is laminated and multidirectional woven fibre material in one or more combination; Wherein said each layer fibre reinforced composites are the combination of one or more modes in the following mode along the mode of pipe laying: axially laying, hoop are laid, are laid at a certain angle.
Preferably, described curable polymer comprises body material and auxiliary material; Body material is selected from thermosetting resin, thermoplastic resin and high performance resin; Auxiliary material are selected from curing agent, coupling agent, initator, thinner, crosslinking agent, fire retardant, polymerization inhibitor, anti-static agent, light stabilizer and filler; Wherein said thermosetting resin is selected from epoxy resin, phenolic resin, unsaturated polyester resin, furan, polyurethane resin, polyimide resin, span and comes amide resin, organic siliconresin, allyl resin or their modified resin.
Preferably, anti-corrosion material comprises polyolefin anti-corrosion material, anticorrosion band and anticorrosion adhesive tape, contraction bands.
Preferably, the polyolefin anti-corrosion material comprises polyethylene, polypropylene, double layer construction polyethylene (bottom is that Bond, surface layer are polyethylene), three-decker polyethylene (bottom is that epoxy anticorrosion layer, mesosphere are that Bond, skin are polyolefin); Anticorrosion band and anticorrosion adhesive tape comprise polyethylene glue adhesive tape, the anticorrosion band of coal tar oil, asphalt anti-corrosion band, polyethylene cold tape wrap, polypropylene Cold winding band, viscoelastic body anticorrosion adhesive tape; Heat-contraction sleeve (band) comprises crosslinked polyethylene heat-contraction sleeve (band).
Preferably, further comprising the steps of before in step (1): a) utilize three heating tapes that the regional both sides and the centre that need repaired mouth are heated simultaneously, b) be heated to uniform temperature, middle heating tape is removed, and heating is continued in the heating tape on both sides; Comprise following steps afterwards in step (2): with the heating tape zone of repaired mouth is heated, and utilize polyurethane heat-insulation watt to be incubated, make repaired mouth insulation certain hour, guarantee that resin fully solidifies.
The utility model also provides a kind of conduit assembly that is obtained by method of the present utility model, wherein said conduit assembly comprises: fibre reinforced composites that the zone of the outer polyolefin anticorrosive coat of steel pipe, steel pipe, the repaired mouth between the polyolefin anticorrosive coat coats and the anti-corrosion material that coats in the outside of fibre reinforced composites, wherein the zone of repaired mouth comprises the exposed steel pipe zone between the polyolefin anticorrosive coat and the polyolefin anticorrosive coat zone of the optional certain-length adjacent with exposed steel pipe.
Preferably, the length of fibre reinforced composites extend to described polyolefin anticorrosive coat above, fibre reinforced composites and the certain size of described polyolefin anticorrosive coat overlap joint, the i.e. fibre reinforced composites of coating certain-length on the described polyolefin anticorrosive coat zone adjacent with described exposed steel pipe.
Preferably, the length of the anti-corrosion material that coats in the outside of fibre reinforced composites extends to above the described polyolefin anticorrosive coat, anti-corrosion material and described polyolefin anticorrosive coat overlap certain size, also coat the anti-corrosion material of certain-length above the promptly described polyolefin anticorrosive coat.
The material of repaired mouth of the present utility model and matrix for example pipe surface bonding strength height, anti-cathodic disbonding good, do not seep water, chemical resistance is strong.
The polyolefin of opening-supplementing material of the present utility model and former anticorrosive coat (PE) is bonding evenly effectively, the intensity height.Method operational sequence simple fixation of the present utility model greatly reduces the shrink belt that the restriction because of field condition restriction or workmen's construction level causes and heats uneven phenomenon, increases substantially construction quality.
Description of drawings
Describe the utility model in detail below in conjunction with following accompanying drawing.
Fig. 1 repairs the schematic representation of pre-structure for repaired mouth.
Fig. 2 is the schematic representation that twines steel pipe and anticorrosive coat place with composite material.
Fig. 3 is the schematic representation of the shrink belt of repaired mouth outside.
Fig. 4 has added shrink belt after the vacuum diaphragm to be close to schematic representation on the pipeline.
Fig. 5 is the schematic representation with Electric heating appliance heating repaired mouth place shrink belt.
The schematic representation of Fig. 6 for vacuumizing with vacuum pump after the shrink belt heat.
Embodiment:
The utility model provides a kind of method of repaired mouth of steel pipe polyolefin anticorrosive coat, and this method comprises the steps:
(1) the regional covered fiber reinforced composite of the repaired mouth between steel pipe polyolefin anticorrosive coat;
(2) coat anti-corrosion material in the outside of fibre reinforced composites;
Wherein the zone of repaired mouth comprises the exposed steel pipe zone between the polyolefin anticorrosive coat and the polyolefin anticorrosive coat zone of the optional certain-length adjacent with exposed steel pipe.
Step (1) can also comprise the steps: surface treatment is carried out to improve interface binding power in exposed steel pipe zone before.
The surface-treated method can comprise one or more in oil removing, rust cleaning, phosphatization, coupling agent coupling and the passivation.
The length of the fibre reinforced composites that use in the step (1) can extend to described polyolefin anticorrosive coat above, fibre reinforced composites and the certain size of described polyolefin anticorrosive coat overlap joint, the i.e. fibre reinforced composites of coating certain-length on the described polyolefin anticorrosive coat zone adjacent with described exposed steel pipe.
The mode of covered fiber reinforced composite can be in the following mode any one in the step (1):
At first twine fibre reinforced composites, twine fibre reinforced composites in two side portions then at intermediate portion;
At first twine fibre reinforced composites at intermediate portion, twine fibre reinforced composites in two side portions then, the fibre reinforced composites part that is wrapped on the two side portions overlaps with the fibre reinforced composites that twine at intermediate portion;
Twine fibre reinforced composites from a side direction opposite side.
On the described polyolefin anticorrosive coat zone adjacent, want to carry out following steps in the zone of covered fiber reinforced composite: on described polyolefin anticorrosive coat, apply adhesive with described exposed steel pipe; Carry out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length then with described exposed steel pipe.
Can also comprise the steps: described polyolefin anticorrosive coat is carried out surface treatment before the top covered fiber reinforced composite of polyolefin anticorrosive coat, to improve interface binding power.
Described surface treatment can comprise one or more the combination in corona treatment, flame treatment, chemical pretreatment solution processing, plasma treatment, polycrystalline coring, surface grafting method, heating, hacking, the coupling agent coupling.Can carry out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length immediately after on described polyolefin anticorrosive coat, applying adhesive with described exposed steel pipe, or carrying out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length behind the adhesive surface drying, or after doing solid work, adhesive carries out the described step that on the described polyolefin anticorrosive coat zone adjacent, coats the fibre reinforced composites of certain-length with described exposed steel pipe with described exposed steel pipe.
The length of the anti-corrosion material that coats in the outside of fibre reinforced composites can be for a) length with fibre reinforced composites is identical, perhaps b) extend to described polyolefin anticorrosive coat above, anti-corrosion material and described polyolefin anticorrosive coat overlap certain size, also coat the anti-corrosion material of certain-length above the promptly described polyolefin anticorrosive coat.
The anti-corrosion material that coats certain-length on fibre reinforced composites and above the described polyolefin anticorrosive coat can comprise the steps:
1) on fibre reinforced composites surface or the surface-coated adhesive of described polyolefin anticorrosive coat;
2) coat anti-corrosion material in the adhesive outside.
Before coating described anti-corrosion material, can also comprise the steps: fibre reinforced composites or described polyolefin anticorrosive coat are carried out surface treatment to improve interface binding power.
Described surface treatment can comprise one or several the combination in hacking, oil removing, coupling agent coupling, corona treatment, flame treatment, chemical pretreatment solution processing, plasma treatment, polycrystalline coring, the surface grafting method.
Step 2) can after step 1), carry out immediately, or behind the adhesive surface drying, coat anti-corrosion material, or do solid work back coating anti-corrosion material at adhesive.
Adhesive can comprise hot melt adhesive, acrylic (modified acrylic acid) adhesive, polyurethanes adhesive, preferred hot melt adhesive.
Hot melt adhesive can comprise ethene-vinyl acetate copolymerization build (being called for short the EVA type) hot melt adhesive, ethene improved-the vinyl acetate copolymer type (being called for short the modified EVA type) hot melt adhesive, polyamide-based (PA) hot melt adhesive, polyester type (PET) hot melt adhesive, polyurethane (PU) type hot melt adhesive, thermoplastic elastomer (TPE) (SDS) type hot melt adhesive.
Step (2) may further include following steps: after the anti-corrosion material that will not heat coats and finishes, paste Stamping Steel Ribbon on the anti-corrosion material both sides, again sealing film is bonded on the Stamping Steel Ribbon, whole repaired mouth position is sealed, vacuumize with vacuum pump, the repaired mouth position is compressed, begin to heat the repaired mouth position afterwards.
The step at heating repaired mouth position can be electricity consumption heating equipment heating repaired mouth position, the temperature that temperature arrives the hot melt adhesive fusing and can overflow from the edge, remove Electric heating appliance, begin to vacuumize, catch up with air simultaneously the anti-corrosion material surface to be flattened to both sides while vacuumizing; Repaired mouth position natural cooling, cooling procedure continues to catch up with the pressure air, follows the interruption exhaust, up to the complete cooling curing of described anti-corrosion material.
Described Electric heating appliance can be any in heating tape, heater band, heating resistance collar, Frequency Induction Heating and the Far-infrared Heating device.
The method of covered fiber reinforced composite can be laid for wet method in the step (1), and the step that wherein said wet method is laid comprises:
(A) needing the region surface brushing curable polymer of repaired mouth;
(B) lay fiber, and roll extrusion, make curable polymer evenly flood described fiber;
Randomly repeat (A) and (B) repeatedly, be cured then.
The method of covered fiber reinforced composite can comprise the dry method laying in the step (1), and the step that wherein said dry method is laid comprises:
(A) at fiber surface dip-coating curable polymer, make the fiber prepreg;
(B) need the zone of repaired mouth to lay the fiber prepreg that one or more layers step (A) obtains, be cured then.
Described fibre reinforced composites can comprise one or more in glass fibre reinforced composion, basalt fibre reinforcing composite material, carbon fibre reinforced composite, aramid fibre reinforced composite, ultrahigh molecular weight polyolefin fibers reinforced composite and the boron fibre reinforced composite.
Described fiber can be a continuous fiber, be selected from unidirectional fibre, quadrature or oblique no latitude cloth lamination, two-dimensional fabric is laminated and multidirectional woven fibre material in one or more combination; Wherein said each layer fibre reinforced composites are the combination of one or more modes in the following mode along the mode of pipe laying: axially laying, hoop are laid, are laid at a certain angle.
Described curable polymer can comprise body material and auxiliary material; Body material is selected from thermosetting resin, thermoplastic resin and high performance resin; Auxiliary material are selected from curing agent, coupling agent, initator, thinner, crosslinking agent, fire retardant, polymerization inhibitor, anti-static agent, light stabilizer and filler; Wherein said thermosetting resin is selected from epoxy resin, phenolic resin, unsaturated polyester resin, furan, polyurethane resin, polyimide resin, span and comes amide resin, organic siliconresin, allyl resin or their modified resin.Anti-corrosion material can comprise polyolefin anti-corrosion material, anticorrosion band and anticorrosion adhesive tape, contraction bands.
The polyolefin anti-corrosion material can comprise polyethylene, polypropylene, double layer construction polyethylene (bottom is that Bond, surface layer are polyethylene), three-decker polyethylene (bottom is that epoxy anticorrosion layer, mesosphere are that Bond, skin are polyolefin); Anticorrosion band and anticorrosion adhesive tape comprise polyethylene glue adhesive tape, the anticorrosion band of coal tar oil, asphalt anti-corrosion band, polyethylene cold tape wrap, polypropylene Cold winding band, viscoelastic body anticorrosion adhesive tape; Heat-contraction sleeve (band) comprises crosslinked polyethylene heat-contraction sleeve (band).At present both at home and abroad the most frequently used thermal shrinkage (cover) band is the certain thickness EVA type hot melt adhesive of coating and making on the crosslinked polyethylene base material.
Can also may further comprise the steps before in step (1): a) utilize three heating tapes that the regional both sides and the centre that need repaired mouth are heated simultaneously, b) be heated to uniform temperature, middle heating tape is removed, and heating is continued in the heating tape on both sides; Comprise following steps afterwards in step (2): with the heating tape zone of repaired mouth is heated, and utilize polyurethane heat-insulation watt to be incubated, make repaired mouth insulation certain hour, guarantee that resin fully solidifies.
The utility model also provides a kind of conduit assembly that is obtained by method of the present utility model, wherein said conduit assembly comprises: fibre reinforced composites that the zone of the outer polyolefin anticorrosive coat of steel pipe, steel pipe, the repaired mouth between the polyolefin anticorrosive coat coats and the anti-corrosion material that coats in the outside of fibre reinforced composites, wherein the zone of repaired mouth comprises the exposed steel pipe zone between the polyolefin anticorrosive coat and the polyolefin anticorrosive coat zone of the optional certain-length adjacent with exposed steel pipe.
The length of fibre reinforced composites can extend to described polyolefin anticorrosive coat above, fibre reinforced composites and the certain size of described polyolefin anticorrosive coat overlap joint, the i.e. fibre reinforced composites of coating certain-length on the described polyolefin anticorrosive coat zone adjacent with described exposed steel pipe.
The length of the anti-corrosion material that coats in the outside of fibre reinforced composites can extend to above the described polyolefin anticorrosive coat, anti-corrosion material and described polyolefin anticorrosive coat overlap certain size, also coat the anti-corrosion material of certain-length above the promptly described polyolefin anticorrosive coat.
The utility model provides a kind of method of repaired mouth of steel pipe polyolefin anticorrosive coat, and this method comprises the steps:
(1) the regional covered fiber reinforced composite of the repaired mouth between steel pipe polyolefin anticorrosive coat;
(2) coat anti-corrosion material in the outside of fibre reinforced composites.
The utility model can further be subdivided into following steps:
(1) exposed steel pipe position is through surface treatments such as sandblast or polishings; (2) apply one deck tacky resin in steel tube surface, twine one deck and the wide fibre cloth of exposed steel pipe then, with round brush fibre cloth and resin are clinged, simultaneously air is driven out of while twining.One deck resin one deck fibre cloth winding around, directly twine till be equal to anticorrosive coat thickness.This moment, steel pipe was wrapped by fibre cloth and resin, and the resin that overflows simultaneously fills up the slit of fibre cloth and anticorrosive coat.(3) repaired mouth two ends anticorrosive coat polyolefin surfaces is through flame treatment, promptly with big fire with polyolefin baking to 100 ℃, continue 10 minutes, shinny and sense of touch elasticity up to the surface; Perhaps polyolefin surfaces degree of depth hacking (degree of depth is greater than 2mm); (4) polyolefin surfaces is handled the back and is coated the hot melt adhesive of fusion on its surface earlier, twines the fiber of preimpregnation tacky resin again.When (5) treating fiber and resin semi-solid preparation (or not solidifying) shrink belt is wrapped in outside it; (6) stick Stamping Steel Ribbon at position, shrink belt outer surface both sides of the edge, be stained with sealing film, two mouths of bleeding are placed in the position of 3:00 and 9:00 in sealing film.Earlier sealing film is tentatively vacuumized, guarantee the smooth pipeline outside that is pressed on of shrink belt, promptly turn off vacuum pump; (7) with Electric heating appliance heating repaired mouth position (this Electric heating appliance is meant heating tape, heater band, heating resistance collar and intermediate frequency induction heating device etc.), temperature arrives about 150 ℃, remove Electric heating appliance, begin to vacuumize, catch up with air simultaneously the shrink belt surface to be flattened to both sides while vacuumizing; (8) repaired mouth position natural cooling, cooling procedure continues to catch up with the pressure air, follows and is interrupted exhaust in short-term, up to its complete cooling curing.
The utility model provides steel pipe polyolefin anticorrosive coat (polyolefin) duct products of above-mentioned composite material of a kind of usefulness and shrink belt repaired mouth again.Repaired mouth product with this material and making method preparation has increased substantially construction quality, has protected steel pipe well, and this method is simple and feasible effectively.
The anti-corrosion material that is used for steel pipe polyolefin anticorrosive coating repaired mouth position steel tube surface that the utility model the provides composite material that can be tacky resin be composited with fibre cloth (with relevant fibers such as glass fibre, carbon fiber, basalt fibres) is with the non-solvent epoxy priming paint of steel tube surface brushing in this material substitution tradition jointing method.It is bonding that polyolefin surfaces is smeared the hot melt adhesive and the composite material of fusion, substitutes the epoxy primer of polyolefin surfaces brushing in traditional jointing method.
Fig. 2 shows an embodiment of the present utility model.The repaired mouth structure is made of polyolefin anticorrosive coat 1 and exposed steel pipe 2 as shown in Figure 1.Stick with glue the composite material 3 that resin and fiber composite form and be wrapped in exposed steel pipe 2 outsides.Before twining, can be at first to the steel tube surface sand blast, also can be with methods such as grinding process; At steel pipe 2 surface-coated one deck tacky resins, twine the wide fibre cloth of one deck and exposed steel pipe 2 then, fibre cloth and resin are clinged with round brush while twining, simultaneously air is driven out of.Each layer fibre cloth all will be by the resin thorough impregnation, and round brush is rolled into the fibre cloth both sides with unnecessary resin simultaneously.One deck resin one deck fibre cloth like this directly twines till be equal to anticorrosive coat 1 thickness.This moment, steel pipe was wrapped by composite material 3, and the resin that overflows simultaneously fills up the slit of fibre cloth and anticorrosive coat 1.The bonding step of the polyolefin of repaired mouth two ends and anticorrosive coat (PE) can be: earlier to polyolefin surfaces 4 flame surface treatment, coat the hot melt adhesive of fusion again, the fibre cloth that will flood tacky resin again is coated on the polyolefin surfaces 4 and is entangled on the intermediate composite with width 5 overlap joints of 2cm.Coat shrink belt 6 then as anti-corrosion material, as shown in Figure 3.
Adopt the foregoing description to have following advantage: the composite material 3 that steel tube surface is twined fiber and tacky resin has more protectiveness than traditional epoxy primer to steel pipe 2, and this composite material 3 and steel pipe 2 surface adhesion intensity height, anti-cathodic disbonding be good, do not seep water, chemical resistance is strong.Even the shrink belt cracking can not erode to steel pipe at short notice yet.The anticorrosion grade of this repaired mouth is equal to steel pipe polyolefin anticorrosive coat.This jointing method need not heat steel pipe, has simplified working procedure.Polyolefin surfaces 4 places are smeared hot melt adhesive and twine latex bonded fibre, and this method has guaranteed shrink belt and polyolefinic effectively bonding, has reduced in constructing the requirement to material.
Fig. 4 illustrates another embodiment of the present utility model.After repaired mouth place steel pipe has twined composite material 3, shrink belt 6 is wrapped in outside it.With Stamping Steel Ribbon 8 water white sealing film 7 is bonded at the shrink belt edge, the shrink belt bag is played (as shown in Figure 4), in sealing film 7 respectively in the position of 3:00 and 9:00 two mouths 11 of bleeding, vacuumize (as shown in Figure 6) with 12 pairs of sealing films 7 of vacuum pump.Sealing film 7 extruding shrink belts 6 are pressed on pipe surface with it, as shown in Figure 4.After shrink belt 6 is compacted, in 9 heating of sealing film 7 external application Electric heating appliances, with temperature controlling instrument 10 with the heating and temperature control of repaired mouth position shrink belt about 150 ℃ of hot melt adhesive melting points; Steel pipe 2 temperature are controlled at about 80 ℃, are incubated 10-15 minute, turn off heating power supply and take off Electric heating appliance 9.Once more sealing film 7 is vacuumized, push air to both sides, overflow from the edge, just stop to vacuumize until hot melt adhesive while vacuumizing.Repaired mouth position natural cooling, cooling procedure continues to catch up with the pressure air, follows and is interrupted exhaust in short-term, up to its complete cooling curing.
Adopt the foregoing description to have following advantage: the operation of heating adopts the directly method at heating repaired mouth position of Electric heating appliance 7, has substituted traditional naked light heating, has reduced the narrow limitation that site operation can not be got angry.The method that vacuumizes with vacuum pump 12 makes vacuum diaphragm 7 that shrink belt 6 tightly is squeezed in pipe surface simultaneously, can make shrink belt 6 bonding more even.The first heating afterwards vacuumizes, and air driven out of simultaneously that shrink belt 6 is tightlyer sticking.The method operational sequence simple fixation greatly reduces the shrink belt that the restriction because of field condition restriction (not possessing moving naked light condition) or workmen's construction level causes and heats uneven phenomenon, increases substantially construction quality.
Further specify as follows for the hot melt adhesive of using in the utility model.Hot melt adhesive is matrix with the thermoplastic resin, according to the base-material chemical composition, it is multiple that hot melt adhesive can be divided into ethene-vinyl acetate copolymerization build (be called for short EVA type), polyamide-based (PA) hot melt adhesive, polyester (PET) hot melt adhesive and polyurethane (PU) type etc., wherein EVA type most importantly.
The basic recipe of modified EVA hot-melt adhesive (mass fraction) can be EVA resin 100; Grafted maleic anhydride MAH 14 on EVA; CS petroleum resin 45; Fluid wax 10; Carbon black 5; Organo montmorillonite OMMT, 3; BHT antioxidant 2; Cumyl peroxide DCP 1.5.
The polyamide (PA) hot melt adhesive has good pliability, oil resistance and bonding property.Its component can be (mass fraction): low softening point polyamide resin: 71; Dibutyl phthalate (DBP) (DBP): 12; 618#:2.0; Rosin: 13.4; Hyper-branched polyester 1.0.
Polyester (PET) hot melt adhesive prescription (mass fraction) can be poly-adipic acid second diester: 89; Glycerine maleation polyisobutylene: 10; MDI (general name of the modifier of methyl diphenylene diisocyanate (pure MDI), the mixture (polymeric MDI) that contains pure MDI of certain proportion and polyphenyl polymethylene polyisocyanates and pure MDI and polymeric MDI): 11.
Polyurethane (PU) type thermosol formula (mass fraction) can be hexamethylene-diisocyanate (HDI): 35.0; 1,6-hexylene glycol: 13.2; Neopentyl glycol: 7.8; Polyester polyol: 40; Methyl diphenylene diisocyanate (MDI), 5.0.
In the method for the present utility model, replace naked light baking repaired mouth shrink belt commonly used with Electric heating appliance and carry out bonding; Composite material with resin and fiber is bonded in steel tube surface and the alternative epoxy primer commonly used of polyolefin surfaces; Push and take out tight repaired mouth shrink belt with vacuumizing method.The utility model makes composite material and steel tube surface bonding closely, and its shear strength and cathodic disbonding performance are all above epoxy primer; Composite material is wrapped in polyolefin surfaces, guaranteed shrink belt and polyolefinic effectively bonding, has reduced in the construction requirement to material; Electric heating appliance directly is added in the repaired mouth position, makes the hot melt adhesive on the shrink belt evenly melt, evenly cover; With vacuumizing method extruding repaired mouth shrink belt, guarantee the repaired mouth bonding quality.Operating speed is fast, convenient simultaneously, efficient is high, has solved the bonding technical problem of pipeline polyolefin anticorrosive coating repaired mouth preferably.
Below described embodiment of the present utility model in detail, can do a lot of improvement and variation obviously for a person skilled in the art and can not deviate from essence spirit of the present utility model.All these changes and improvements are all within protection domain of the present utility model.
Claims (4)
1. the repaired mouth conduit assembly of a steel pipe polyolefin anticorrosive coat, wherein said conduit assembly comprises: fibre reinforced composites that the zone of the outer polyolefin anticorrosive coat of steel pipe, steel pipe, the repaired mouth between the polyolefin anticorrosive coat coats and the anti-corrosion material that coats in the outside of fibre reinforced composites, wherein the zone of repaired mouth comprises the exposed steel pipe zone between the polyolefin anticorrosive coat and the polyolefin anticorrosive coat zone of the optional certain-length adjacent with exposed steel pipe.
2. repaired mouth conduit assembly as claimed in claim 1, it is characterized in that steel pipe partly twines fibre reinforced composites, twine fibre reinforced composites in two side portions then, the fibre reinforced composites part that is wrapped in both sides overlaps with the fibre reinforced composites that twine at intermediate portion.
3. conduit assembly as claimed in claim 1, wherein, the length of fibre reinforced composites extend to described polyolefin anticorrosive coat above, fibre reinforced composites and the certain size of described polyolefin anticorrosive coat overlap joint, the i.e. fibre reinforced composites of coating certain-length on the described polyolefin anticorrosive coat zone adjacent with described exposed steel pipe.
4. as claim 1 or 3 described conduit assemblies, wherein, the length of the anti-corrosion material that coats in the outside of fibre reinforced composites extends to above the described polyolefin anticorrosive coat, anti-corrosion material and described polyolefin anticorrosive coat overlap certain size, also coat the anti-corrosion material of certain-length above the promptly described polyolefin anticorrosive coat.
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| CN2009201679673U CN201651667U (en) | 2009-08-04 | 2009-08-04 | Tube assembly of steel pipeline polyolefin anticorrosive coating repaired mouth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201679673U CN201651667U (en) | 2009-08-04 | 2009-08-04 | Tube assembly of steel pipeline polyolefin anticorrosive coating repaired mouth |
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| CN201651667U true CN201651667U (en) | 2010-11-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936442B (en) * | 2009-07-01 | 2012-12-12 | 北京安科管道工程科技有限公司 | Method for mending steel pipeline polyolefin anticorrosive layer and product obtained by same |
| CN102927407A (en) * | 2012-10-23 | 2013-02-13 | 北京安科管道工程科技有限公司 | Method for joint coating of anticorrosive coating layer of steel pipeline and product obtained by using method |
| CN104110556A (en) * | 2013-04-17 | 2014-10-22 | 中国石油天然气股份有限公司 | Anticorrosive coating structure for repairing in-service pipeline joint |
| CN112209170A (en) * | 2020-10-28 | 2021-01-12 | 常州市新创智能科技有限公司 | Method for automatically winding glass fiber of metal bolt based on servo control |
| CN113669557A (en) * | 2020-05-14 | 2021-11-19 | 中国石油天然气集团有限公司 | Pipeline joint coating method |
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2009
- 2009-08-04 CN CN2009201679673U patent/CN201651667U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936442B (en) * | 2009-07-01 | 2012-12-12 | 北京安科管道工程科技有限公司 | Method for mending steel pipeline polyolefin anticorrosive layer and product obtained by same |
| CN102927407A (en) * | 2012-10-23 | 2013-02-13 | 北京安科管道工程科技有限公司 | Method for joint coating of anticorrosive coating layer of steel pipeline and product obtained by using method |
| CN102927407B (en) * | 2012-10-23 | 2015-12-09 | 北京安科管道工程科技有限公司 | The method of steel pipeline anti-corrision layer repaired mouth and the product obtained by the method |
| CN104110556A (en) * | 2013-04-17 | 2014-10-22 | 中国石油天然气股份有限公司 | Anticorrosive coating structure for repairing in-service pipeline joint |
| CN104110556B (en) * | 2013-04-17 | 2017-05-10 | 中国石油天然气股份有限公司 | Anticorrosive coating structure for repairing in-service pipeline joint |
| CN113669557A (en) * | 2020-05-14 | 2021-11-19 | 中国石油天然气集团有限公司 | Pipeline joint coating method |
| CN112209170A (en) * | 2020-10-28 | 2021-01-12 | 常州市新创智能科技有限公司 | Method for automatically winding glass fiber of metal bolt based on servo control |
| CN112209170B (en) * | 2020-10-28 | 2021-09-07 | 常州市新创智能科技有限公司 | Method for automatically winding glass fiber of metal bolt based on servo control |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20180804 |