CN102520000B - Pipeline internal coating thermal stress simulator and internal coating adhesion force testing method - Google Patents
Pipeline internal coating thermal stress simulator and internal coating adhesion force testing method Download PDFInfo
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- CN102520000B CN102520000B CN201110456820.8A CN201110456820A CN102520000B CN 102520000 B CN102520000 B CN 102520000B CN 201110456820 A CN201110456820 A CN 201110456820A CN 102520000 B CN102520000 B CN 102520000B
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Abstract
The invention discloses a pipeline internal coating thermal stress simulator, which belongs to the technical field of natural gas pipelines and comprises an air pipeline, an air heating system, a natural gas pipeline and an induced draft fan. The invention further discloses a method utilizing the pipeline internal coating thermal stress simulator to test adhesion force of the internal coating of the natural gas pipeline. The pipeline internal coating thermal stress simulator can simulate hot air circulation process on the actual running condition of the natural gas pipeline. The method can provide evidence for analyzing the service life of the internal coating of the pipeline.
Description
Technical field
The present invention relates to natural gas line technical field, particularly a kind of natural gas line internal coating thermal stress simulation device.
Background technology
Natural gas line drag reduction internal coating not only can be kept apart Korrosionsmedium and tube wall mechanical structure, and protection metal is not corroded, and the more important thing is and can reduce tube wall roughness, thereby reduce the frictional resistance of natural gas flow, increases throughput rate.In design operational throughput one regularly, pipeline drag reduction internal coating has the discharge pressure of reduction, expands boosting station spacing, reduces power consumption, saving steel and executive cost, reduction maintenance cost, guarantee product purity, make inside pipe wall can not cause the plurality of advantages such as accumulation of sediment dirt or paraffin.
But, because pipeline drag reduction internal coating is subject to the impact of the factors such as surface treatment and coating process in painting process, tend to cause the defects such as particle, pin hole, thereby cause inner-walls of duct corrosion.In addition, because pipeline and internal coating exist different coefficient of thermal expansions, mechanical stress when internal coating self exists curing of coatings, in military service process, drag reduction internal coating inevitably can be subject to the impact of natural gas compressor delivery temperature and soil moisture variation, whether pipeline and internal coating long-term creep produce certain impact to internal coating cohesion, or reduce internally coated adhesion.Internally coated adhesion is the key factor that determines that internal coating lost efficacy, and internally coated inefficacy is caused by the adhesion reduction at internal coating and tube metal interface often, and whether the quality of adhesion has been stripped from direct relation with pigging process floating coat again.
Therefore, need a kind of thermal stress simulation device that can simulate natural gas line actual operating mode, thereby to the internally coated influence degree of pipeline drag reduction, provide rule for measuring the variation of natural gas line service temperature, and then set up pipeline coating database, and provide foundation internally coated serviceable life for analysis conduit.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of hot air circulation process that can simulate natural gas line actual operating mode, thereby to the internally coated influence degree of pipeline drag reduction, provide rule for measuring the variation of natural gas line service temperature, and then set up pipeline coating database, and provide the natural gas line internal coating thermal stress simulation device of foundation internally coated serviceable life for analysis conduit.Meanwhile, the present invention also provides the method that this device is tested natural gas line internal coating adhesion of applying.
Natural gas line internal coating thermal stress simulation device provided by the invention comprises air duct, air heating system, natural gas line and induced draft fan, described air duct is divided into I segment pipe, II segment pipe and III segment pipe, one end of described natural gas line is provided with natural gas line entrance, the other end is provided with natural gas line outlet, described I segment pipe outlet is connected in one end of described air heating system, the import of described II segment pipe is connected in the other end of described air heating system, described II segment pipe outlet is connected in described natural gas line entrance, described natural gas line outlet is connected in described III segment pipe entrance, described III segment pipe outlet is connected in described induced draft fan, described induced draft fan can make air flow along the direction of I segment pipe → air heating system → the II segment pipe → natural gas line → the III segment pipe.
As preferably, on described I segment pipe, be provided with air flow rate adjustment valve.
As preferably, described air heating system comprises fuel tank, oil inlet pipe, scavenge pipe, diesel fuel burner and hotair chamber, between described fuel tank and described diesel fuel burner, utilize described oil inlet pipe to be connected with described scavenge pipe, described diesel combustion chamber can be at the indoor formation flame of described air heat, and described I segment pipe outlet is connected in one end of described hotair chamber, and the import of described II segment pipe is connected in the other end of described hotair chamber.
As preferably, on described hotair chamber, be connected with temperature control equipment and/or thermometer.
As preferably, temperature≤75 ℃ of described hotair chamber.
As preferably, described natural gas line is built-in with flow controller, and the diameter of described flow controller is less than the diameter of described natural gas line.
As preferably, described flow controller has circular conical surface in the direction of meeting mutually with air.
The method that the described natural gas line internal coating of application provided by the invention thermal stress simulation device is tested natural gas line internal coating adhesion comprises the following steps:
Apply described device described natural gas line is carried out to hot air circulation test;
Having carried out drawing lattice in the described natural gas line internal coating of hot air circulation test, make to occur coating block in described natural gas line internal coating;
Whether check described coating block can be stripped from, if described coating block cannot be stripped from, the result of described natural gas line internal coating being carried out to adhesion test is qualified.
As preferably, described coating block distance described natural gas line edge is at least 13mm, and described coating block is latticed layout, and described coating block has 225, the length of described coating block and the wide 1.6mm that is respectively, described coating block is deep to described natural gas line metallic interior surface.
As preferably, while checking described coating block whether can be stripped from, plastic adhesive tape is covered to its surface, firmly by thumb first, compress described adhesive tape and make its surface of contact color even, throw off rapidly described adhesive tape.
The beneficial effect of natural gas line internal coating thermal stress simulation device provided by the invention is:
Natural gas line internal coating thermal stress simulation device provided by the invention can be simulated the hot air circulation process of natural gas line actual operating mode, thereby to the internally coated influence degree of pipeline drag reduction, provide rule for measuring the variation of natural gas line service temperature, and then set up pipeline coating database, and provide foundation internally coated serviceable life for analysis conduit.
Accompanying drawing explanation
The structural representation of the natural gas line internal coating thermal stress simulation device that Fig. 1 provides for the embodiment of the present invention.
Embodiment
In order to understand the present invention in depth, below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
Referring to accompanying drawing 1, natural gas line internal coating thermal stress simulation device provided by the invention comprises air duct, air heating system, natural gas line 10 and induced draft fan 13, air duct is divided into I segment pipe 7, II segment pipe 9 and III segment pipe 12, one end of natural gas line 10 is provided with natural gas line 10 entrances, the other end is provided with natural gas line 10 outlets, 7 outlets of I segment pipe are connected in one end of air heating system, 9 imports of II segment pipe are connected in the other end of air heating system, 9 outlets of II segment pipe are connected in natural gas line 10 entrances, natural gas line 10 outlets are connected in III segment pipe 12 entrances, 12 outlets of III segment pipe are connected in induced draft fan 13, induced draft fan 13 can make air flow along the direction of I segment pipe 7 → air heating system → the II segment pipe 9 → natural gas line 10 → the III segment pipes 12.
Wherein, on I segment pipe, be provided with air flow rate adjustment valve 8, so that control air mass flow.
Wherein, a kind of concrete implementation as air heating system, air heating system comprises fuel tank 1, oil inlet pipe 2, scavenge pipe 3, diesel fuel burner 4 and hotair chamber 5, utilize oil inlet pipe 2 to be connected with scavenge pipe 3 between fuel tank 1 and diesel fuel burner 4, diesel fuel burner 4 can be at the interior formation flame 6 of hotair chamber 5,7 outlets of I segment pipe are connected in one end of hotair chamber 5, and 9 imports of II segment pipe are connected in the other end of hotair chamber 5.
Wherein, on hotair chamber, be connected with temperature control equipment 15 and thermometer 14, and control temperature≤75 ℃ of hotair chamber 5.
Wherein, natural gas line 10 is built-in with flow controller 11, and the diameter of flow controller 11 is less than the diameter of natural gas line 10, thereby makes air flowing in natural gas line 10 can simulate well rock gas at ducted flow effect.
Wherein, flow controller 11 has circular conical surface in the direction of meeting mutually with air, thereby makes air flowing in natural gas line 10 can simulate well rock gas at ducted flow effect.
While applying natural gas line internal coating thermal stress simulation device provided by the invention, Air Flow flows along the direction of arrow shown in accompanying drawing 1.
The method that this natural gas line internal coating thermal stress simulation device of application provided by the invention is tested natural gas line internal coating adhesion comprises the following steps:
Step 1: application apparatus carries out hot air circulation test to natural gas line.
Step 2: having carried out drawing lattice in the natural gas line internal coating of hot air circulation test, make to occur coating block in natural gas line internal coating;
Wherein, coating block is at least 13mm apart from natural gas line edge, and coating block is latticed layout, and coating block has 225, the length of coating block and the wide 1.6mm that is respectively, and coating block is deep to natural gas line metallic interior surface.
Step 3: whether check coating block can be stripped from, if coating block cannot be stripped from, the result of natural gas line internal coating being carried out to adhesion test is qualified.
Wherein, when whether check coating block can be stripped from, plastic adhesive tape is covered to its surface, firmly by thumb first, compress adhesive tape and make its surface of contact color even, throw off rapidly adhesive tape.
Natural gas line internal coating thermal stress simulation device provided by the invention can be simulated the hot air circulation process of natural gas line actual operating mode, thereby to the internally coated influence degree of pipeline drag reduction, provide rule for measuring the variation of natural gas line service temperature, and then set up pipeline coating database, and provide foundation internally coated serviceable life for analysis conduit.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a natural gas line internal coating thermal stress simulation device, it is characterized in that, comprise air duct, air heating system, natural gas line and induced draft fan, described air duct is divided into I segment pipe, II segment pipe and III segment pipe, one end of described natural gas line is provided with natural gas line entrance, the other end is provided with natural gas line outlet, described I segment pipe outlet is connected in one end of described air heating system, the import of described II segment pipe is connected in the other end of described air heating system, described II segment pipe outlet is connected in described natural gas line entrance, described natural gas line outlet is connected in described III segment pipe entrance, described III segment pipe outlet is connected in described induced draft fan, described induced draft fan can make air flow along the direction of I segment pipe → air heating system → the II segment pipe → natural gas line → the III segment pipe,
Described air heating system comprises fuel tank, oil inlet pipe, scavenge pipe, diesel fuel burner and hotair chamber, between described fuel tank and described diesel fuel burner, utilize described oil inlet pipe to be connected with described scavenge pipe, described diesel combustion chamber can be at the indoor formation flame of described air heat, described I segment pipe outlet is connected in one end of described hotair chamber, and the import of described II segment pipe is connected in the other end of described hotair chamber;
On described hotair chamber, be connected with temperature control equipment and/or thermometer;
Temperature≤75 ℃ of described hotair chamber;
Described natural gas line is built-in with flow controller, and the diameter of described flow controller is less than the diameter of described natural gas line;
Described flow controller has circular conical surface in the direction of meeting mutually with air.
2. device according to claim 1, is characterized in that, on described I segment pipe, is provided with air flow rate adjustment valve.
3. application rights requires the method that the device described in 1 or 2 is tested natural gas line internal coating adhesion, it is characterized in that, comprises the following steps:
Application rights requires the device described in 1 or 2 to carry out hot air circulation test to described natural gas line;
Having carried out drawing lattice in the described natural gas line internal coating of hot air circulation test, make to occur coating block in described natural gas line internal coating;
Whether check described coating block can be stripped from, if described coating block cannot be stripped from, the result of described natural gas line internal coating being carried out to adhesion test is qualified.
4. method according to claim 3, it is characterized in that, described coating block distance described natural gas line edge is at least 13mm, described coating block is latticed layout, described coating block has 225, the length of described coating block and the wide 1.6mm that is respectively, described coating block is deep to described natural gas line metallic interior surface.
5. method according to claim 4, is characterized in that, while checking described coating block whether can be stripped from, plastic adhesive tape is covered to its surface, firmly by thumb first, compresses described adhesive tape and makes its surface of contact color even, throws off rapidly described adhesive tape.
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| CN201110456820.8A CN102520000B (en) | 2011-12-31 | 2011-12-31 | Pipeline internal coating thermal stress simulator and internal coating adhesion force testing method |
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| CN201110456820.8A CN102520000B (en) | 2011-12-31 | 2011-12-31 | Pipeline internal coating thermal stress simulator and internal coating adhesion force testing method |
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| CN102520000B true CN102520000B (en) | 2014-02-05 |
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| CN103335943A (en) * | 2013-05-31 | 2013-10-02 | 东莞市正新包装制品有限公司 | Detection method for adhesion of gravure ink for plastic film |
| CN104792694A (en) * | 2015-03-30 | 2015-07-22 | 四川长虹电器股份有限公司 | Gold-stamping adhesion force detection method |
| CN105158155B (en) * | 2015-08-14 | 2018-10-16 | 芜湖蓝博塑胶有限公司 | Air-conditioning plastic part is stained with stickiness detection device |
| CN105910984A (en) * | 2016-05-03 | 2016-08-31 | 苏州昆岭薄膜工业有限公司 | Lamination film and base paper adhesive fastness evaluative method |
| CN109406390A (en) * | 2018-11-28 | 2019-03-01 | 航天科工防御技术研究试验中心 | A kind of detection method and its equipment of coating interface bond strength |
| CN109765119B (en) * | 2019-01-14 | 2021-11-26 | 北京工业大学 | In-situ device for measuring thermal stress on surface of thermal barrier coating system |
| CN112858161B (en) * | 2021-01-12 | 2022-03-11 | 西南石油大学 | Device and method for measuring adhesion force of gas hydrate and pipeline wall surface |
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| CN1209612C (en) * | 2002-03-07 | 2005-07-06 | 中国石油天然气股份有限公司 | Internal coating pressure-tight test device |
| CN101339123A (en) * | 2008-06-02 | 2009-01-07 | 夏玉国 | Method for determining wooden furniture lacquerfilm coatings adhesive force |
| CN101603917B (en) * | 2009-07-14 | 2015-01-07 | 福建浔兴拉链科技股份有限公司 | Method and equipment for detecting adhesive force of pull head coating |
| CN101818836B (en) * | 2010-02-09 | 2011-09-28 | 北京航空航天大学 | Roll forming method for shape of inner wall coating of natural gas pipeline and roll forming device thereof |
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