CN201277411Y - Prepreg mending layer structure of defect-contained pipe - Google Patents
Prepreg mending layer structure of defect-contained pipe Download PDFInfo
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- CN201277411Y CN201277411Y CNU2008200804703U CN200820080470U CN201277411Y CN 201277411 Y CN201277411 Y CN 201277411Y CN U2008200804703 U CNU2008200804703 U CN U2008200804703U CN 200820080470 U CN200820080470 U CN 200820080470U CN 201277411 Y CN201277411 Y CN 201277411Y
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Abstract
The utility model relates to a prepreg repair layer structure which contains a defective pipeline and relates to the technical field of pipeline systems. The prepreg repair layer structure is characterized in that a prepreg potential corrosion resistant layer (2), a prepreg reinforced layer (3) and a corrosion-proof layer (4) are wrapped on the periphery of a pipeline (1) in turn from inside to outside. Since the prepreg repair layer structure adopts a method for preparing prepreg without solvent, thereby the prepreg does not contain volatile components, the defects in the solvent which generates holes in the composite materials are avoided, and the performance of the composite materials and the use reliability are guaranteed. Thereby prepreg repair layer structure which contains a defective pipeline has high and even quality, long service life and high reliability.
Description
Technical field
The utility model is a kind of prepreg repair layer structure for pipelines with defects.Relate to the pipe-line system technical field.
Background technique
According to statistics, China surpasses 5 * 10 in the long oil and gas pipeline length overall of labour at present
4Km, wherein considerable part is on active service through for many years, has produced defective in various degree, need upgrade, transformation, overhaul or brownout operation, therefore the repair of pipeline has become essential, regular work in the oil-gas gathering and transportation process, and all need drop into a large amount of manpower and financial resources every year.Traditional pipe repairing method comprises repair welding, mends plate, sleeve etc., considers that from Security, Economy and reliability equal angles these methods can not adapt to the requirements at the higher level that petroleum industry proposes repairing technique.Adopting polymer matrix composites to repair in the last few years becomes the focus of research and application, this mainly is because compare with traditional body defect-restoration method therefor, the composite material recovery technique is a kind of outer reinforcement technology that does not stop production, characteristics such as can give full play to after the reparation that composite material light is high-strength, anticorrosive, good endurance, designability are strong guarantee pipeline long-term normal operation under original operating conditions.Companies more both domestic and external have developed relevant material system and repairing technique, and begin to be used in the middle of the actual engineering.
At present, composite material pipe-repairing technology mainly contains two kinds, and a kind of is pre-shaping method, and a kind of is wet winding method.Pre-shaping method is that the Clockspring company of the U.S. develops and through engineering approaches at first, this method adopt unsaturated polyester and glass fibre in factory in advance the caliber according to defective pipeline prepare combined sleeve, by mighty bond combined sleeve is bonded in pipe surface at the scene of repairing then, thereby plays the purpose of recovering pipeline strength.The shortcoming of this technology is: at first because combined sleeve rigidity is bigger, not yielding, be difficult in the work progress guarantee to fit tightly between combined sleeve and the body, influenced whole load effect, and this technology can only be used for the bigger circular pipe of curvature, can not the irregular position of repair structure, as tee union etc.; The second, limited because what adopt is modulus and all lower glass fibre of intensity, and the hydrothermal aging poor performance of glass fiber compound material to the recovery efficient of body intensity, be not easy for that humidity is big, the higher environment of temperature; The 3rd, because combined sleeve is produced through a series of processes such as extruding, oven dry, heat treatment and curing in factory, its cost is higher, and efficient is lower.Wet winding method is that not resiniferous flexible fiber cloth is wrapped on the pipeline, simultaneously with the resin brushing on fibre cloth, resin solidification and form composite material under uniform temperature and time with fiber, composite material be close to pipeline on, share most of load, thereby played the purpose of pipe-repairing.Domestic Beijing Anke Pipeline Project Technology Co., Ltd is is the matrix of composite material with epoxy resin, be the reinforcing material of composite material with the carbon fiber plate, adopt the wet law technology that twines to carry out repairing pipe.This recovery technique also exists tangible deficiency: at first owing to be to prepare glue at the construction field (site) and twine, the ratio of the ratio of each component, resin and fiber, resin are to be difficult to control to the infiltration degree of fiber, the isoparametric conformity of flatness of fibre cloth in the glue, they all are subjected to the influence of factors such as workmen's qualification, repairing amount, construction environment, raw material original state, therefore the validity and the endurance of repair layer all are unpredictable, the rigidity and the strength fluctuation of repair layer are bigger, are unsuitable for the reparation of high-temperature and pressure pipeline; In addition, the work situation of this technology in implementation process is relatively poor, efficiency is low, and the fiber hair that comes off on volatile component in the resin and the fibre cloth causes allergic easily, and the health of human body is had certain harm, and environment is also had certain pollution; Last carbon fiber and Metal Contact cause the potential corrosion of metal easily, and more obvious in a humid environment, this antiseptic effect to pipeline has a significant impact.
Prepreg is the common used material of Aero-Space load composite material structural member, it is to strengthen body and resin system is a raw material with continuous fiber, arrange machine or pre-dipping machine of employing makes resin system be in solution state or heating and melting state, under certain speed, fiber is soaked into, obtain the fibre reinforcement of surface by resin parcel, and a kind of sheet material that obtains by rolling.Resin in this sheet material is in its uncured state, make prepreg that certain viscosity be arranged, and resin can flow under uniform temperature and pressure, finally solidify to form composite material.Because prepreg is to produce on the equipment of automation, manufacturing efficiency height, resin content are very even, and the scope of resin content can in very large range be regulated by the change of process parameter.The mass stability of this sheet material is good, can be used for various composite material process plannings, be particularly suitable for manual paving technology, the goods that can be used for various labyrinths, the composite property excellence that makes, fibre content high and evenly, long service life, reliability height, obtained large-scale application in national defence and civil area.
But bury ground at the long oil and gas pipeline of labour owing to its particularity, that yes is inapplicable for above-mentioned prepreg.If can solve high-strength, anticorrosive, the good endurance that requires at the long oil and gas pipeline of labour, designability is high-strength and humidity is big, the higher environmental problem of temperature, certain prepreg is a kind of technology of pipeline strength rehabilitation preferably.Our company is through for many years research and development, head it off successfully, and applied for patent of invention simultaneously.Is technical problem to be solved and adopt prepreg to the repair layer structure of pipeline strength rehabilitation.
The model utility content
The purpose of this utility model be design a kind of with prepreg be used for the quality of repairing defective pipeline high and evenly, long service life, prepreg repair layer structure for pipelines with defects that reliability is high.
The repairing shop layer structure of the utility model is outwards to wrap up prepreg successively from the lining to prevent potential corrosion layer 2, prepreg enhancement layer 3 and anticorrosive coat 4 outside pipeline 1 as shown in Figure 1.
Wherein:
The anti-potential corrosion layer 2 of prepreg is glass fibre prepreg, basalt fibre prepreg, Kevlar prepreg or several combinations, and the number of plies is between 1～3 layer; This prepreg is to soak into resin dedicated fiber or fibre cloth in advance, described resin dedicated system comprises: epoxy resin, modified aliphatic amine hardener, Versamid curing agent, 2,4,6-three (dimethylamino methyl) phenol promoter, imidazoles promoter, epoxies reactive diluent; Its proportioning is:
A) epoxy resin accounts for 45-55%;
B) the modified aliphatic amine hardener accounts for 2.5-15%;
C) the Versamid curing agent accounts for 2.5-30%;
D) 2,4,6-three (dimethylamino methyl) phenol promoter accounts for 0.5-2.5%;
E) imidazoles promoter accounts for 0.5-3.5%;
F) the epoxies reactive diluent accounts for 0-7.5%;
It mainly is to utilize described fabric resistor rate height, with Metal Contact the characteristics of potential corrosion do not take place, strengthens the antiseptic power of pipeline;
The utility model does not prepare prepreg because employing does not contain solvent, does not contain volatile component in the prepreg, has avoided solvent to have the composite inner hole defective that causes, has guaranteed performance of composites and operational safety.So, the prepreg repair layer structure quality of defective pipeline high and evenly, long service life, reliability height.
Description of drawings
Fig. 1 repairing pipe shop layer structural representation
Among the figure: 1-pipeline 2-prevents the potential corrosion layer
3-enhancement layer 4-anticorrosive coat
Embodiment
Embodiment. embodiment of the present utility model is described and the utility model is further described with this example.This example is an experiment prepreg repair layer structure.The repair layer structure of this example as shown in Figure 1, be outside pipeline 1 from the lining outside anti-potential corrosion layer 2, enhancement layer 3 and anticorrosive coat 4 of parcel successively.
Wherein:
The anti-potential corrosion layer 2 of prepreg is glass fibre prepregs, and the number of plies is 3 layers, mainly is to utilize described fabric resistor rate height, with Metal Contact the characteristics of potential corrosion do not take place, strengthens the antiseptic power of pipeline;
These two kinds of prepregs are to soak into resin dedicated fiber or fibre cloth in advance, described resin dedicated system comprises: epoxy resin, modified aliphatic amine hardener, Versamid curing agent, 2,4,6-three (dimethylamino methyl) phenol promoter, imidazoles promoter, epoxies reactive diluent; Its proportioning is:
A) epoxy resin accounts for 50%;
B) the modified aliphatic amine hardener accounts for 11.5%;
C) the Versamid curing agent accounts for 25%;
D) 2,4,6-three (dimethylamino methyl) phenol promoter accounts for 2.5%;
E) imidazoles promoter accounts for 3.5%;
F) the epoxies reactive diluent accounts for 7.5%;
This example is the commerical test of doing at the celebrating iron wire, to the 10 places corrosion region reinforcement in 1 kilometer distance, and through the detection in 1 year, stands the pressure test of 3MP, and the reinforcement position is as excellent as before.
Claims (4)
1. a prepreg repair layer structure for pipelines with defects is characterized in that outwards wrapping up prepreg anti-potential corrosion layer (2), prepreg enhancement layer (3) and anticorrosive coat (4) successively from the lining in pipeline (1) periphery.
2. prepreg repair layer structure for pipelines with defects according to claim 1 is characterized in that described anti-potential corrosion layer (2) is 1～3 layer of glass fibre prepreg, basalt fibre prepreg, Kevlar prepreg.
3. prepreg repair layer structure for pipelines with defects according to claim 1 is characterized in that described enhancement layer (3) is 2～10 layers of carbon fiber, glass fibre prepreg, basalt fibre prepreg, Kevlar prepreg.
4. prepreg repair layer structure for pipelines with defects according to claim 1 is characterized in that described anticorrosive coat (4) is selected from polyethylene cold and twines adhesive tape, composite polyethylene antiseptic adhesive band or anticorrosive paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200804703U CN201277411Y (en) | 2008-05-09 | 2008-05-09 | Prepreg mending layer structure of defect-contained pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200804703U CN201277411Y (en) | 2008-05-09 | 2008-05-09 | Prepreg mending layer structure of defect-contained pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201277411Y true CN201277411Y (en) | 2009-07-22 |
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ID=40894996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200804703U Expired - Lifetime CN201277411Y (en) | 2008-05-09 | 2008-05-09 | Prepreg mending layer structure of defect-contained pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201277411Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013004751A1 (en) * | 2011-07-04 | 2013-01-10 | Maretex Gmbh | Corrosion protection layer |
| CN111503418A (en) * | 2020-03-23 | 2020-08-07 | 中山大学 | Pressurized plugging composite structure and plugging method for gas leakage of underwater pipe gallery with high-pressure gas around |
-
2008
- 2008-05-09 CN CNU2008200804703U patent/CN201277411Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013004751A1 (en) * | 2011-07-04 | 2013-01-10 | Maretex Gmbh | Corrosion protection layer |
| EP2729539B1 (en) * | 2011-07-04 | 2017-09-06 | Mare Solutions GmbH | Corrosion protection layer |
| CN111503418A (en) * | 2020-03-23 | 2020-08-07 | 中山大学 | Pressurized plugging composite structure and plugging method for gas leakage of underwater pipe gallery with high-pressure gas around |
| CN111503418B (en) * | 2020-03-23 | 2021-06-22 | 中山大学 | Pressurized plugging composite structure and plugging method for gas leakage of underwater pipe gallery with high-pressure gas around |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090722 |
|
| CX01 | Expiry of patent term |