CN102527623A - Method for coating inner wall of bent and abnormally-shaped pipeline with small aperture by using painting - Google Patents
Method for coating inner wall of bent and abnormally-shaped pipeline with small aperture by using painting Download PDFInfo
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- CN102527623A CN102527623A CN2011103975724A CN201110397572A CN102527623A CN 102527623 A CN102527623 A CN 102527623A CN 2011103975724 A CN2011103975724 A CN 2011103975724A CN 201110397572 A CN201110397572 A CN 201110397572A CN 102527623 A CN102527623 A CN 102527623A
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Abstract
The invention relates to a method for coating the inner wall of a bent and abnormally-shaped pipeline with a small aperture by using a painting. The method comprises the following steps of: (1) dragging an inflatable ball, of which one end is tied with a rope, into the pipeline from one port of the pipeline, blocking the port of the pipeline, and making the free end of the rope pass from the pipeline to the other port of the pipeline; (2) injecting the painting into the pipeline from the other non-blocked port of the pipeline until the painting is positioned above the inflatable ball in the pipeline; and (3) dragging the free end of the rope at constant speed, so that the inflatable ball can pass through the whole pipeline. The method cannot be influenced by the viscosity of the painting, so that various anti-corrosion paintings can be conveniently, uniformly and smoothly coated on the inner wall of the pipeline to be protected; furthermore, the construction cost is low; and the problem that a large number of paintings cannot be coated on the inner wall of the conventional bent and abnormally-shaped pipeline with the small aperture is solved.
Description
Technical field
The present invention relates to a kind of coating application method of inner-walls of duct, be specifically related to a kind ofly apply method small-bore, crooked special-shaped inner-walls of duct with coating.
Background technology
In the pipeline installation process, in most cases small-bore, crooked special-shaped inner-walls of duct is not done any preservative treatment, so the pipeline corrosion-resistant, service life is not long, and maintenance cycle shortens.For addressing this problem, the method that adopts at present is that dip-coating or filling are coated with, and low-viscosity dope is coated on inner-walls of duct, but this method receives the restriction of dope viscosity, and filming of applying is inhomogeneous, and protection effect is undesirable.
Existing inner-walls of duct painting method has two ball walking device extruding to be coated with the lining method, and it is earlier with injector spray paint in pipe, and behind the intact coating to be painted, first spheroid walking device of emission in pipe drives it by nitrogen and moves to the pipe Inner Front End again.Afterwards, spray paint in pipe is stopped material back second spheroid walking device of emission in pipe again.This method is through twice spray paint and throw in the spheroid walking device; Make coating be expressed to the other end from pipeline one end; Though carrying out coating to inner-walls of duct, it applies; But complex procedures, prepare on the surface, coating is selected and extrusion process requires all very strictly, also receives the influence (radius of curvature at pipeline turning not should less than 5 times of caliber) of pipeline turning radius of curvature simultaneously.
The application of Chinese patent publication number: 101773891A is disclosed to be a kind of inner walls of small-caliber metallic spray equipment and technology; It is directly to stretch into spray gun in the metal tube; Carry out application through moving spray gun and heater, the coating that this invention is adopted is thermoplastic powder coating and thermosetting powder coating.And can only carry out application to the inner walls of small-caliber metallic of straight type, can not carry out application, and the powdery paints that uses needs heating, the operational procedure complicacy crooked special-shaped small-bore pipeline.
Therefore, need provide a kind of method that applies small-bore, crooked special-shaped inner-walls of duct with coating to address the above problem.
Summary of the invention
The object of the invention is to provide a kind of can be coated to method small-bore, crooked special-shaped inner-walls of duct various coating are convenient, equably.
Deficiency to the coating application method of small-bore in the prior art, crooked special-shaped inner-walls of duct; The inventor is through research and practice; Propose a kind of at little caliber, (length is less than 6m for crooked special-shaped pipeline; Internal diameter is that 30mm～100mm) inwall carries out the pumping painting construction method of liquid coating, and this method has unique effect to crooked shape tube interior finishing.
For realizing foregoing invention purpose of the present invention, the present invention adopts following technical scheme:
A kind ofly apply method small-bore, crooked special-shaped inner-walls of duct with coating; This method may further comprise the steps: (1) is fastened an end inflatable ball of rope and is drawn in the said pipeline from a port of pipeline; Block this port of said pipeline, and with the free end of said rope from passing in the said pipeline to the another port of said pipeline; (2) in said pipeline, inject the top of the said inflatable ball of coating to the said pipeline from the said another port that said pipeline is not blocked; (3) free end of the said rope of pull at the uniform velocity makes said inflatable ball through whole said pipeline.
Wherein, the diameter of said inflatable ball is 1.1～1.2 times of said internal diameter of the pipeline, and the length of said rope is greater than the length of said pipeline.
Wherein, said inflatable ball is preferably selected polyurethane rubber for use for adopting the solvent resistance thin-wall ball processed of polyurethane rubber, fluorosioloxane rubber or nitrile rubber preferably, and the wall thickness of balloon is 0.5mm～1.0mm, and leaves air-filled pore and be used for inflation.Said inflatable ball also adopts above-mentioned material to process the thin-walled rubber tube earlier, the spheroid of processing through intercepting again.
Wherein, when applying said pipeline, earlier said pipeline 30 degree that tilt are placed, when will arrive the said another port that said pipeline do not block to the said inflatable ball of oblique upper pull the time, said pipeline is set level, unnecessary coating is flow in the feeder.
What the present invention adopted is the pumping painting construction method, through elastic hollow spheroid (inflatable ball) in pipeline relative to moving uniformly, coating is squeezed to inner-walls of duct formation films comparatively uniformly.The sphere diameter size is decided according to caliber, is generally 1.1～1.2 times of internal diameter of the pipeline.Utilize inflatable ball according to the shape of inner-walls of duct the instant characteristic that changes to take place easily; Should be when construction with elasticity balloon inflation to external diameter greater than internal diameter of the pipeline; Generally being controlled at 1.1:1～1.2:1 is advisable; Can guarantee that like this inflatable ball has higher extruding force, balloon is moved in pipeline easily, guarantee to film evenly.Particularly at elbow part, inflatable ball can evenly press on all directions of tube wall, the coating extruding is formed film comparatively uniformly.
The coating of described employing pumping painting method construction generally adopts high build paint (dope viscosity is greater than 350 mPas), and it can make coating on tube wall, form and film uniformly.After the fluid that viscosity is low excessively passed through extruding, it was too thin to film, and was difficult for evenly.The formed film quality of this construction method (thickness, the uniformity) receives balloon size (pressure), dope viscosity, drawing velocity influence bigger, and under the constant situation of other conditions, pressure is big more, and it is thin more to film; Viscosity is big more, and it is thick more to film; Drawing velocity is fast more, and it is thin more to film, and vice versa.Can be during concrete the construction according to above factor timely adjustment, on top of.For guaranteeing to film evenly, preferably carry out the multiple tracks construction, generally more than three roads, twice at least, overlay painting interval road is in the past filmed to do solid work and is as the criterion.Because the inner-walls of duct air flow property is poor, drying mode is adopted in the drying suggestion of coating.
The present invention is applicable to the application of circular pipe inwalls such as feed pipe, feed pipe, appendix, petroleum pipeline.The pumping painting construction is carried out at the position that is particularly useful for corroding easily in the little caliber of centering, the crooked shape tube.
Painting method of the present invention does not receive the influence of dope viscosity, can be coated onto on the inner-walls of duct that needs to protect various anticorrosive paints are convenient, evenly, glossily, and inner-walls of duct is played better antirust anti-scaling action.And construction cost is low, has solved multiple coating can't carry out effective application at present at small-bore, crooked special-shaped inner-walls of duct a difficult problem.
Description of drawings
Fig. 1 is for adopting painting method of the present invention at the osculum sketch map of shape inner-walls of duct painting of coating straight.
Fig. 2 is for adopting the sketch map of painting method of the present invention in the special-shaped inner-walls of duct painting of coating of bending.
The primary clustering symbol description:
| a | Tube wall | b | Rope |
| c | Coating | d | Inflatable ball |
| e | Film | f | Support |
The specific embodiment
Below, the present invention is further specified, but the present invention is not limited to these embodiment through several groups of exemplary embodiments.
In conjunction with accompanying drawing 1-2 painting method of the present invention is further specified:
Referring to Fig. 1, applying osculum straight during the shape pipeline, earlier pipeline is tilted to 30 degree through support f, the inflatable ball d that again upper end is fixed with rope b draws in the lower end of duct mouth from duct bottom, blocks pipeline, and the external diameter of inflatable ball d is for wanting 1.2 times of coating tubes internal diameter.Then with the free end of rope b from passing port in the pipeline to pipeline.Pour liquid coating c into pipeline from the pipeline port afterwards; Keep certain coating content, evenly spur the free end of rope b then apace, make inflatable ball d uniform motion in pipeline; When inflatable ball d will arrive the pipeline port; Pipeline is set level, unnecessary coating c is flow in the feeder, so not only practiced thrift coating but also can guarantee the cleaning of pipeline port.At last, pull out first road coating that inflatable ball d accomplishes tube wall a.Dry first road and film, make its reach do solid work after, repeat aforesaid operations and carry out the coating of filming in second and third road to pipeline.
Referring to Fig. 2, for applying crooked special-shaped pipeline, except the inclination of saving the support f in the foregoing description is supported, its painting method and coating osculum be shape pipeline basically identical straight, repeats no more at this.Wherein the external diameter of inflatable ball d is for wanting 1.1 times of coating tubes internal diameter.
That the present invention is particularly suitable for is small-bore, the anticorrosive paint application of crooked special-shaped inner-walls of duct.The method also is particularly suitable for those can't irritate the application of mastic in the special-shaped pipeline of bending that is coated with construction.
After through method of the present invention small-bore, crooked special-shaped inner-walls of duct being carried out application, the painting effect test data is as shown in the table:
| Sequence number | Project | Test result |
| 1 | Apparent state | Coating surface is bright and clean smooth |
| 2 | One-pass film-forming thickness, μ m | 60～100 |
| 3 | Adhesive force (drawing back method), MPa | 10 |
| 4 | Impact strength, cm | 50 |
Can find out by above data, through method of the present invention inner-walls of duct is carried out application after, coating in apparent good order and condition, and have outstanding adhesion and impact strength, excellent combination property between tube wall.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (8)
1. one kind applies method small-bore, crooked special-shaped inner-walls of duct with coating, and it is characterized in that: this method may further comprise the steps:
(1) inflatable ball of an end being fastened rope is drawn in the said pipeline from a port of pipeline, blocks this port of said pipeline, and with the free end of said rope from passing in the said pipeline to the another port of said pipeline;
(2) in said pipeline, inject the top of the said inflatable ball of coating to the said pipeline from the said another port that said pipeline is not blocked;
(3) free end of the said rope of pull at the uniform velocity makes said inflatable ball through whole said pipeline.
2. the method for claim 1, it is characterized in that: the diameter of said inflatable ball is 1.1～1.2 times of said internal diameter of the pipeline, and the length of said rope is greater than the length of said pipeline.
3. the method for claim 1 is characterized in that: the thin-wall ball of said inflatable ball for adopting polyurethane rubber, fluorosioloxane rubber or nitrile rubber to process, and leave air-filled pore and be used for inflation.
4. the method for claim 1 is characterized in that: the spheroid that the thin-walled rubber tube that said inflatable ball is processed for employing polyurethane rubber, fluorosioloxane rubber or nitrile rubber is processed through intercepting.
5. one kind like the described method of one of claim 1-4, and it is characterized in that: the wall thickness of said inflatable ball is 0.5mm～1.0mm.
6. the method for claim 1; It is characterized in that: after said method also is included in said step (1); Said pipeline inclination 30 degree are placed; Will be by pull during in said step (3) to said another port that said pipeline is not blocked when said inflatable ball, said pipeline is set level, unnecessary coating is flowed in the feeder.
7. the method for claim 1, it is characterized in that: said coating is the high build paint of viscosity greater than 350 mPas.
8. the method for claim 1, it is characterized in that: the length of said pipeline is less than 6m, and internal diameter is 30mm～100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397572.4A CN102527623B (en) | 2011-12-05 | 2011-12-05 | Method for coating inner wall of bent and abnormally-shaped pipeline with small aperture by using painting |
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| CN201110397572.4A CN102527623B (en) | 2011-12-05 | 2011-12-05 | Method for coating inner wall of bent and abnormally-shaped pipeline with small aperture by using painting |
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| CN102527623A true CN102527623A (en) | 2012-07-04 |
| CN102527623B CN102527623B (en) | 2014-01-08 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103831210A (en) * | 2012-11-22 | 2014-06-04 | 中国石油天然气股份有限公司 | Extrusion coating device for corrosion prevention in pipeline and coating method thereof |
| CN103934150A (en) * | 2014-05-05 | 2014-07-23 | 西安金立石油科技有限公司 | Internal extruded coating device and internal extruded coating method of small-diameter short tube for drainage gas recovery of natural gas well |
| CN106285503A (en) * | 2016-09-27 | 2017-01-04 | 西南石油大学 | Acid gas well flow string inwall medium corrosion-resistant automatic painting apparatus and method |
| CN107150014A (en) * | 2017-07-02 | 2017-09-12 | 大庆庆鲁朗润科技有限公司 | The method and apparatus of coating coating in pipeline |
| CN107344161A (en) * | 2016-05-06 | 2017-11-14 | 成都力创交大交通设备有限公司 | Aluminium alloy extrusions inner chamber inner lining material application device |
| CN108103943A (en) * | 2017-12-20 | 2018-06-01 | 中交第二航务工程局有限公司 | The device and its application method reeved in HDPE casings |
| CN108531926A (en) * | 2018-04-18 | 2018-09-14 | 佛山市奥耶克思机械设备有限公司 | A kind of inner wall of metal tube derusting device and derusting method |
| CN108546957A (en) * | 2018-04-18 | 2018-09-18 | 佛山市奥耶克思机械设备有限公司 | A kind of inner wall of the pipe derusting device and derusting method |
| CN112246550A (en) * | 2020-08-28 | 2021-01-22 | 南京阿兹曼电子科技有限公司 | Water pipe inner wall coating device and coating method thereof |
| TWI798575B (en) * | 2020-08-07 | 2023-04-11 | 和碩聯合科技股份有限公司 | Coating device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108580197B (en) * | 2018-04-23 | 2019-12-03 | 青岛西海岸市政工程有限公司 | A kind of pipe material inner wall waterproof layer application device and smearing method |
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| EP0473103A1 (en) * | 1990-08-28 | 1992-03-04 | Mitsui Petrochemical Industries, Ltd. | Method for lining internal surfaces of pipelines |
| US20050287294A1 (en) * | 2004-06-18 | 2005-12-29 | Plastocor, Inc. | System and method for coating tubes |
| CN2843639Y (en) * | 2005-11-25 | 2006-12-06 | 保定天威集团有限公司 | Paint sprayer for internal wall of pipeline |
| CN200969507Y (en) * | 2006-10-19 | 2007-10-31 | 吴江达胜机械制造有限公司 | Heat-shrinkable protective sleeve inner wall gluing device |
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2011
- 2011-12-05 CN CN201110397572.4A patent/CN102527623B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0473103A1 (en) * | 1990-08-28 | 1992-03-04 | Mitsui Petrochemical Industries, Ltd. | Method for lining internal surfaces of pipelines |
| US20050287294A1 (en) * | 2004-06-18 | 2005-12-29 | Plastocor, Inc. | System and method for coating tubes |
| CN2843639Y (en) * | 2005-11-25 | 2006-12-06 | 保定天威集团有限公司 | Paint sprayer for internal wall of pipeline |
| CN200969507Y (en) * | 2006-10-19 | 2007-10-31 | 吴江达胜机械制造有限公司 | Heat-shrinkable protective sleeve inner wall gluing device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103831210A (en) * | 2012-11-22 | 2014-06-04 | 中国石油天然气股份有限公司 | Extrusion coating device for corrosion prevention in pipeline and coating method thereof |
| CN103934150A (en) * | 2014-05-05 | 2014-07-23 | 西安金立石油科技有限公司 | Internal extruded coating device and internal extruded coating method of small-diameter short tube for drainage gas recovery of natural gas well |
| CN103934150B (en) * | 2014-05-05 | 2016-09-14 | 西安金立石油科技有限公司 | A kind of interior squeezing and coating layer method of the minor diameter short tube for natural gas well water pumping gas production |
| CN107344161A (en) * | 2016-05-06 | 2017-11-14 | 成都力创交大交通设备有限公司 | Aluminium alloy extrusions inner chamber inner lining material application device |
| CN106285503A (en) * | 2016-09-27 | 2017-01-04 | 西南石油大学 | Acid gas well flow string inwall medium corrosion-resistant automatic painting apparatus and method |
| CN107150014B (en) * | 2017-07-02 | 2023-06-20 | 中国人民解放军92228部队 | Method and device for applying paint in pipeline |
| CN107150014A (en) * | 2017-07-02 | 2017-09-12 | 大庆庆鲁朗润科技有限公司 | The method and apparatus of coating coating in pipeline |
| CN108103943A (en) * | 2017-12-20 | 2018-06-01 | 中交第二航务工程局有限公司 | The device and its application method reeved in HDPE casings |
| CN108546957A (en) * | 2018-04-18 | 2018-09-18 | 佛山市奥耶克思机械设备有限公司 | A kind of inner wall of the pipe derusting device and derusting method |
| CN108531926A (en) * | 2018-04-18 | 2018-09-14 | 佛山市奥耶克思机械设备有限公司 | A kind of inner wall of metal tube derusting device and derusting method |
| TWI798575B (en) * | 2020-08-07 | 2023-04-11 | 和碩聯合科技股份有限公司 | Coating device |
| CN112246550A (en) * | 2020-08-28 | 2021-01-22 | 南京阿兹曼电子科技有限公司 | Water pipe inner wall coating device and coating method thereof |
| CN112246550B (en) * | 2020-08-28 | 2021-11-05 | 南京阿兹曼电子科技有限公司 | Water pipe inner wall coating device and coating method thereof |
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| CN102527623B (en) | 2014-01-08 |
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