CN102513279A - Method for automatically coating anticorrosive paint on outer wall of heavy-caliber PCCP (Prestressed Concrete Cylinder Pipe) online - Google Patents
Method for automatically coating anticorrosive paint on outer wall of heavy-caliber PCCP (Prestressed Concrete Cylinder Pipe) online Download PDFInfo
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- CN102513279A CN102513279A CN201110376656XA CN201110376656A CN102513279A CN 102513279 A CN102513279 A CN 102513279A CN 201110376656X A CN201110376656X A CN 201110376656XA CN 201110376656 A CN201110376656 A CN 201110376656A CN 102513279 A CN102513279 A CN 102513279A
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Abstract
The invention discloses a method for automatically coating an anticorrosive paint on the outer wall of a heavy-caliber PCCP (Prestressed Concrete Cylinder Pipe) online. Through selecting requirements, equipment and paints for processing the surface of the PCCP, researching a coating process, adopting preheating treatment of components A and B of a 725-H53-102 solvent-free epoxy coal tar heavy-duty anticorrosive paint and designing an automatic lifting platform and a rotary platform, automatic control on a spraying process is realized. The researched method for automatically coating the anticorrosive paint on the outer wall of the heavy-caliber PCCP online is effectively applied to the construction of the anticorrosive paint on the outer wall of the heavy-caliber PCCP during south-to-north water transfer, has a spraying efficiency of 320m<2>/h through measurement, has the capabilities of reducing production cost by 50 percent and increasing working efficiency by above 500 percent, and is a scientific and practical construction method.
Description
Technical field
The present invention relates to a kind of coating application method, the on-line automatic coating process of particularly a kind of heavy caliber PCCP outer wall anticorrosive paint.
Background technology
Burying the ground concrete duct is made up of reinforcing bar, cement, sand, stone, water etc.; Outer surface receives corrosion factor in the soil, penetrates into inside concrete like the chlorion in the salt affected soil, moisture content etc., causes concrete deterioration; Osmosis through the fine crack in the concrete; Cause the reinforcing bar generation corrosion of inside concrete, cause the PCCP booster, xoncrete structure ftractures, peels off with intensity and reduce.
From the end of the sixties in last century; The U.S. is at the coal-tar epoxy type anticorrosive paint of the ultra thick film of heavy caliber PCCP aqueduct exterior applications high solid; The Amercoat1972B type coal-tar epoxy coating of Ameron company wherein; Successively use tens million of square metres, Libyan 4500Km " big race " engineering in the U.S., the Middle East.The solvent-free modified epoxy coal-tar paint of the D1028 of the Kukdo Chemical Co., Ltd of Korea S is also as the outside surface anticorrosion application of paints of burying ground PCCP.Main application mode still adopts the mode of brushing, roller coat and airless spraying to carry out.
In China,, caused great economic loss because concrete protection is not caused enough attention.And arrive at present; China does not also issue the relevant criterion of PCCP protection; Similarly standard has two: the one, and Ministry of Communications has issued JTJ 275-2000 " concrete for marine works structural anticorrosion erosion technical specification ", and regulation and stipulation is at the harbour concrete facility of building, and its design protection time limit was greater than 10 years; The epoxide coal bituminous coating that uses, its application thickness must be greater than 500um; The 2nd, the SY/T0447-96 " buried steel pipeline epoxy coal tar pitch coating technical standard " of Oil and Natural Gas Corporation's issue adopts the anticorrosion mode of priming paint+finish paint+glass cloth, adds intensity level for the spy, and its thickness is greater than 600um.And the mode that adopts on-line automatic application is carried out the anticorrosive construction of solvent-free coal bituminous coating to concrete duct, does not also appear in the newspapers.
Xiamen Shuangrui Shipbuilding Paint Co., Ltd. is that object of protection has been carried out the series exploitation research work with the south water to north (Beijing section) PCCP; A cover science, practical anticorrosive paint on-line automatic coating process have been developed; And successfully this method is applied to the south water to north (Beijing section), the PCCP outer wall anticorrosive paint construction of big kitchen second phase of Shenyang, obtained good effect.
Summary of the invention
Technical problem to be solved by this invention provides the on-line automatic coating process of a kind of heavy caliber PCCP outer wall anticorrosive paint; Solve the problem of heavy caliber PCCP outer wall anticorrosive paint constructional difficulties; Satisfy the on-line automatic application of on-the-spot heavy caliber PCCP outer wall anticorrosive paint, the coating cloud that reduces in labour intensity and the coating process pollutes, and promotes labor productivity; Reduce production costs, reach purpose efficient, energy-conservation, that reduce discharging.
For the purpose that realizes solving the problems of the technologies described above, the present invention has adopted following technical scheme:
The on-line automatic coating process of a kind of heavy caliber PCCP outer wall anticorrosive paint of the present invention comprises:
(1) PCCP tube-surface processing requirements: for the PCCP tube-surface of concrete layer cured, use the pressure-air spray to remove the attachment of the loosening efflorescence of PCCP tube-surface, cement for example, dust and mud etc.; For having sprayed cement mortar, do not carry out the PCCP tube-surface of maintenance, need not to carry out surface treatment, can directly spray;
(2) selection of coating: select solvent-free epoxy coal tar heavy duty anticorrosive coating, this coating can directly be coated on band water-bearing concreae surface; This coating can be selected 725-H53-102 coating or the similar solvent-free epoxy coal tar heavy duty anticorrosive coating by Xiamen Shuangrui Shipbuilding Paint Co., Ltd.'s supply;
(3) choice of equipment: flush coater is selected two component high pressure airless spraying apparatus for use; The rotating speed of rotation platform machine: 1.0～5rpm is adjustable continuously; The rise and fall speed of hoistable platform: 10～50cm/min is adjustable continuously; Compressor delivery pressure: 4～10kg/cm
2, flow: 3～10m
3/ min;
(4) coating process: comprising:
Carry out spraying equipment with cleaning solvent before A, the use and clean, guarantee the pipe-line system cleaning;
B, solvent-free epoxy coal tar heavy duty anticorrosive coating first and second components are preheated to temperature is 30-65 ℃, and stirs;
C, adjusting spraying equipment make solvent-free epoxy coal tar heavy duty anticorrosive coating mix by first group component B proportioning;
D, the platform rotating speed and the hoistable platform decrease speed of regulating the PCCP pipe start spraying equipment and rotating disk, and it is at the uniform velocity descended, and carry out the spraying of anticorrosive paint from the top down; Once close spraying equipment, hoistable platform and rotating disk when being sprayed into the least significant end of pipe;
E, technological parameter are selected: during spraying, the per pass build is 500 ± 50um, and first lap and last lap are flat around 2 circles, and execute the middle part changes decline and press rifle 50%, and build 1000 ± 100um after the application, spray pressure are 27～45MPa;
F, execution conditions are selected: construction temperature carries out under the weather conditions of relative humidity below 90% more than-5 ℃;
G, coating check: behind the coating bone dry, carry out the mensuration of thickness detection and adhesive strength, its average thickness is answered >=900um, and adhesive strength is answered >=1.5MPa;
After H, construction finish, use the cleaning agent cleaning equipment at once.
Thickness detect with the assay method of adhesive strength can for: adopt sonigauge that thickness is detected, its average thickness is answered >=900um; Adopt portable adherometer to carry out the mensuration of adhesive strength, per 10 pipes are inspected by random samples 1 time, and its adhesive strength is answered >=1.5MPa.
During spraying, the per pass build is 500 ± 50um, and first lap and last lap are flat around 2 circles; The middle part is executed to change and is descended and pressure rifle 50%; Its specific requirement is: a last when rotation circle spraying 500 ± 50um, push down during next circle rotation Shang Yiquan the application part 50% with pipe not the application part 50%, go down so continuously; Flat rifle rotation 2 circles are adopted in top and bottom at pipe, make application thickness reach spraying 1000 ± 100um one.
The described heavy caliber PCCP of the method for this patent specifically is meant Prestressed concrete cylinder pipe, is steel pipe between wherein, interior outer lining concrete layer, and twine compressor wire, and spraying cement mortar then, diameter is more than 2m.
Described pair of component high pressure airless spraying apparatus, inlet pressure: 4～10kg/cm
2, compression ratio: 68:1～45:1, nozzle: 0.015～0.045 inch, spray gun and workpiece distance: 25～45cm, spraying swath is wide: 25～35cm.More specifically, two component high pressure airless spraying apparatus adopt two component high pressure airless spraying apparatus that GRACO (Graco) company produces.
The present technique scheme is compared with existing application mode, the main improvement as follows:
(1) to the preheating of solvent-free epoxy coal tar heavy duty anticorrosive coating first and second components, coating composition viscosity is reduced, atomizing effect is better when spraying, and application is more even; Improve the curing rate after coating sprays after coating preheats, shortened the ETL estimated time of loading that is coated with of PCCP pipe, improved operating efficiency;
(2) adopted automatic rising-sinking platform and rotation platform that spraying process has been carried out automation control.
Traditional two-component spraying is an Artificial Control, and the outward appearance of application and the thickness of application lean on people's experience to carry out fully.And the present invention is through the rotary speed of setting rotation platform and the rising or falling speed of automatic rising-sinking platform; And first lap and last lap are flat around 2 circles when having adopted spraying; Execute the middle part changes the technology that descends and press rifle 50%,, make application thickness reach spraying 1000 ± 100um one; What spray is more even, has avoided because the paint waste that the thickness inequality of existing thick-film coating spraying application causes and the scarce limit of coating.
These technical schemes also can mutual combination perhaps combine, thereby reach better technique effect.
Through adopting technique scheme, the present invention has following beneficial effect:
The on-line automatic coating process of heavy caliber PCCP outer wall anticorrosive paint of development has obtained effective application in the construction of south water to north heavy caliber PCCP outer wall anticorrosive paint, through measuring and calculating, its spray efficiency is 320m
2/ h compares with traditional application mode, can reduce production cost 50%, improves work efficiency more than 500%, is the construction method of a kind of science, practicality.
Description of drawings
Fig. 1 is the on-line automatic application sketch map of PCCP outer wall anticorrosive paint.
Among the figure, 1-pipe of cement, 2-rotation platform, 3-lift, 4-spray equipment.In work progress, PCCP is placed on the rotation platform, and spray gun is installed on the hoistable platform, confirms rotation platform rotary speed, hoistable platform decrease speed according to the application thickness, and the speed starting drive according to setting begins application from top to bottom.
The specific embodiment
According to actual condition, in the south water to north (Beijing section), obtained application.
1) construction equipment
The controllable temperature steam baking house
The two component high pressure airless spraying apparatus (68:1) of Graco
Compressed air (pressure 8Kg/cm
2, gas output 3m
3/ min)
Rotation platform: utilize the revolving-turret of pulp shooting machine, rotary speed: 4rpm.
Hoistable platform: utilize the hoistable platform of pulp shooting machine, decrease speed: 35cm/min.
Environment temperature, humidity tester
2)Application
Carry out spraying equipment with special-purpose cleaning solvents such as xylenes before A, the use and clean, guarantee the pipe-line system cleaning.
B, will be preheating to 40-60 ℃ solvent-free epoxy coal tar heavy duty anticorrosive coating first and second components simultaneously and stir.
C, adjusting spraying equipment make solvent-free epoxy coal tar heavy duty anticorrosive coating mix by first Zu Fen ﹕ component B=1 ﹕ 1 (weight ratio or volume ratio).
After D, pulp shooting machine sprayed mortar from bottom to top, the rotating speed of adjustable pipe and hoistable platform decrease speed met design load, started spraying equipment and rotating disk, at the uniform velocity descended by the speed of 35cm/min, carried out the spraying of anticorrosive paint from the top down.Once close spraying equipment, hoistable platform and rotating disk when being sprayed into the least significant end of pipe.
E, when spraying, rotating disk rotary speed 4rpm, the hoistable platform decrease speed is 35cm/min, adopts the cocurrent and parallel spraying, with the film thickness that reaches regulation with avoid the holiday phenomenon.
After F, construction finish, use the cleaning agent cleaning equipment at once.
Claims (5)
1. on-line automatic coating process of heavy caliber PCCP outer wall anticorrosive paint is characterized in that: comprising:
(1) PCCP tube-surface processing requirements: for the PCCP tube-surface of concrete layer cured, use the pressure-air spray to remove the attachment of the loosening efflorescence of PCCP tube-surface, cement for example, dust and mud etc.; For having sprayed cement mortar, do not carry out the PCCP tube-surface of maintenance, need not to carry out surface treatment, can directly spray;
(2) selection of coating: select solvent-free epoxy coal tar heavy duty anticorrosive coating, this coating can directly be coated on band water-bearing concreae surface;
(3) choice of equipment: flush coater is selected two component high pressure airless spraying apparatus for use; The rotating speed of rotation platform machine: 1.0～5rpm is adjustable continuously; The rise and fall speed of hoistable platform: 10～50cm/min is adjustable continuously; Compressor delivery pressure: 4～10kg/cm
2, flow: 3～10m
3/ min;
(4) coating process: comprising:
Carry out spraying equipment with cleaning solvent before A, the use and clean, guarantee the pipe-line system cleaning;
B, solvent-free epoxy coal tar heavy duty anticorrosive coating first and second components are preheated to temperature is 30-65 ℃, and stirs;
C, adjusting spraying equipment make solvent-free epoxy coal tar heavy duty anticorrosive coating mix by first group component B proportioning;
D, the platform rotating speed and the hoistable platform decrease speed of regulating the PCCP pipe start spraying equipment and rotating disk, and it is at the uniform velocity descended, and carry out the spraying of anticorrosive paint from the top down; Once close spraying equipment, hoistable platform and rotating disk when being sprayed into the least significant end of pipe;
E, technological parameter are selected: during spraying, the per pass build is 500 ± 50um, and first lap and last lap are flat around 2 circles, and execute the middle part changes decline and press rifle 50%, and build 1000 ± 100um after the application, spray pressure are 27～45MPa;
F, execution conditions are selected: construction temperature carries out under the weather conditions of relative humidity below 90% more than-5 ℃;
G, coating check: behind the coating bone dry, carry out the mensuration of thickness detection and adhesive strength, its average thickness is answered >=900um, and adhesive strength is answered >=1.5MPa;
After H, construction finish, use the cleaning agent cleaning equipment at once.
2. according to the on-line automatic coating process of the said heavy caliber PCCP of claim 1 outer wall anticorrosive paint; It is characterized in that: described heavy caliber PCCP is meant Prestressed concrete cylinder pipe; Wherein steel pipe, interior outer lining concrete layer, and twine compressor wire; Spray cement mortar then, diameter is more than 2m.
3. according to the on-line automatic coating process of the said heavy caliber PCCP of claim 1 outer wall anticorrosive paint, it is characterized in that: described pair of component high pressure airless spraying apparatus, inlet pressure: 4～10kg/cm
2, compression ratio: 68:1～45:1, nozzle: 0.015～0.045 inch, spray gun and workpiece distance: 25～45cm, spraying swath is wide: 25～35cm.
4. according to the on-line automatic coating process of the said heavy caliber PCCP of claim 1 outer wall anticorrosive paint, it is characterized in that: thickness detect with the assay method of adhesive strength can for: adopt sonigauge that thickness is detected, its average thickness is answered >=900um; Adopt portable adherometer to carry out the mensuration of adhesive strength, per 10 pipes are inspected by random samples 1 time, and its adhesive strength is answered >=1.5MPa.
5. according to the on-line automatic coating process of the said heavy caliber PCCP of claim 1 outer wall anticorrosive paint; It is characterized in that: during spraying, the per pass build is 500 ± 50um, and first lap and last lap are flat around 2 circles; The middle part is executed to change and is descended and pressure rifle 50%; Its specific requirement is: a last when rotation circle spraying 500 ± 50um, push down during next circle rotation Shang Yiquan the application part 50% with pipe not the application part 50%, go down so continuously; Flat rifle rotation 2 circles are adopted in top and bottom at pipe, make application thickness reach spraying 1000 ± 100um one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376656XA CN102513279A (en) | 2011-11-24 | 2011-11-24 | Method for automatically coating anticorrosive paint on outer wall of heavy-caliber PCCP (Prestressed Concrete Cylinder Pipe) online |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376656XA CN102513279A (en) | 2011-11-24 | 2011-11-24 | Method for automatically coating anticorrosive paint on outer wall of heavy-caliber PCCP (Prestressed Concrete Cylinder Pipe) online |
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|---|---|
| CN102513279A true CN102513279A (en) | 2012-06-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170377A (en) * | 2015-09-22 | 2015-12-23 | 山东龙泉管道工程股份有限公司 | Anti-corrosion full-automatic spraying device for outer portion of vertical steel cylinder concrete pipe with caliber larger than 1400 mm |
| CN105289890A (en) * | 2015-09-22 | 2016-02-03 | 山东龙泉管道工程股份有限公司 | Method for preventing bell and spigot faucet from being splashed in process of spraying outer corrosion-resistant layer to pre-stressed concrete cylinder pipe (PCCP) |
| CN108941206A (en) * | 2018-07-09 | 2018-12-07 | 叶博浩 | A kind of electrode roller preheating device |
| CN114654569A (en) * | 2022-03-25 | 2022-06-24 | 青岛环球集团重工科技有限公司 | Release agent spraying device and spraying process for producing wallboard |
Citations (1)
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|---|---|---|---|---|
| CN101284969A (en) * | 2007-04-14 | 2008-10-15 | 厦门双瑞船舶涂料有限公司 | Solvent-free epoxy coal tar heavy duty anticorrosive coating and preparation process thereof |
-
2011
- 2011-11-24 CN CN201110376656XA patent/CN102513279A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101284969A (en) * | 2007-04-14 | 2008-10-15 | 厦门双瑞船舶涂料有限公司 | Solvent-free epoxy coal tar heavy duty anticorrosive coating and preparation process thereof |
Non-Patent Citations (4)
| Title |
|---|
| 《水利建设与管理》 20081231 王峰 "超大口径PCCP外防腐全自动湿态涂装工艺技术应用" 第43-45页 1-5 , 第4期 * |
| 《水利水电技术》 20091231 程翠林 等 "大口径PCCP生产工艺流程与厂区布置" 第68-71、79页 1-5 第40卷, 第11期 * |
| 王峰: ""超大口径PCCP外防腐全自动湿态涂装工艺技术应用"", 《水利建设与管理》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170377A (en) * | 2015-09-22 | 2015-12-23 | 山东龙泉管道工程股份有限公司 | Anti-corrosion full-automatic spraying device for outer portion of vertical steel cylinder concrete pipe with caliber larger than 1400 mm |
| CN105289890A (en) * | 2015-09-22 | 2016-02-03 | 山东龙泉管道工程股份有限公司 | Method for preventing bell and spigot faucet from being splashed in process of spraying outer corrosion-resistant layer to pre-stressed concrete cylinder pipe (PCCP) |
| CN108941206A (en) * | 2018-07-09 | 2018-12-07 | 叶博浩 | A kind of electrode roller preheating device |
| CN108941206B (en) * | 2018-07-09 | 2020-01-10 | 叶博浩 | Electrode roller preheating device |
| CN114654569A (en) * | 2022-03-25 | 2022-06-24 | 青岛环球集团重工科技有限公司 | Release agent spraying device and spraying process for producing wallboard |
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Application publication date: 20120627 |