CN1321798C - Method and apparatus for producing inside and outside anticorrosion steel-plastic composite pipe - Google Patents
Method and apparatus for producing inside and outside anticorrosion steel-plastic composite pipe Download PDFInfo
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- CN1321798C CN1321798C CNB2004100153183A CN200410015318A CN1321798C CN 1321798 C CN1321798 C CN 1321798C CN B2004100153183 A CNB2004100153183 A CN B2004100153183A CN 200410015318 A CN200410015318 A CN 200410015318A CN 1321798 C CN1321798 C CN 1321798C
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Abstract
The present invention relates to a method and a device for producing a plastic-steel composite pipe of which both the interior and the exterior have anti-corrosive property. The method of the present invention comprises the following procedures that 1) a steel pipe enters a production line via a pipe feeding platform (1); 2) the steel pipe is preheated by a preheating device (2); 3) the steel pipe is conveyed to a derusting device (3) for the interior of the steel pipe, and the inner wall of the steel pipe is derusted; 4) the steel pipe is preheated by a heating device (6); 5) powdery paint is sprayed to the inner wall of the steel pipe by a spray device (7) for the interior of the steel pipe; 6) the outer wall of the steel pipe is derusted by an outer derusting machine set (10); 7) an outer adhesive layer and an outer plastic layer are extruded on the outer wall of the steel pipe continuously in order by an adhesive layer extruding device (15) and a plastic layer extruding device (16); 8) the steel pipe is cooled by a cooling device (17). The device for producing the plastic-steel composite pipe in the present invention comprises the pipe feeding platform (1), the preheating device (2), the derusting device (3), the heating device (6), the spray device (7) for the interior of the steel pipe, the outer derusting machine set (10), the adhesive layer extruding device (15), the plastic layer extruding device (16) and the cooling device (17). The method of the present invention has simple process, low cost and good economic benefit; the device of the present invention has the advantages of simple structure, easy installation and easy use.
Description
1, technical field:
The present invention relates to a kind of production method of internal and external anti-corrosive steel-plastics composite pipe, belong to the innovative technology of the production method of internal and external anti-corrosive steel-plastics composite pipe.
2, background technology:
Steel pipe plays important effect in pipeline is carried, but the etching problem of steel pipe affects the service life of steel pipe always.Steel-plastics composite pipe (patent No. 01257775.8) preferably resolves the etching problem of medium-small diameter steel pipe, its cost is low, corrosion-resistant, easy to connect, obtained more application, but the middle large-diameter pipeline of diameter more than 250mm, the complexity that this kind steel-plastics composite pipe production technology can become, it is very fast that cost is improved, and uses less.In middle large diameter steel pipe is anticorrosion, uses more aseptic technic and be: outer wall of steel pipe adopts 2PE or 3PE anticorrosive coat, and the steel pipe inwall adopts the epoxy powder anti-corrosion layer, and these two kinds of anticorrosive coats all have the technology of comparative maturity.But at present generally can not be to epoxy powder, outer 2PE or 3PE anticorrosive coat in adopting simultaneously inside and outside the steel pipe, also need to adopt two production lines separately to make even adopt, and effect is bad, for example after skin is carried out the 3PE anticorrosive coat, when carrying out the internal layer spraying again, thickness can only reach below the 100 μ m, and the thickness of interior anticorrosive coat just can play antiseptic effect more than will reaching 300 μ m.So at present domestic founded a capital and anticorrosion most of pipeline of building is only done outside do not done interior anticorrosion.Also has a kind of new internal and external anti-corrosive layer process, at the outer 3PE anticorrosion structure that adopts of steel pipe, internal layer has adopted liquid epoxy coating, because of liquid epoxy coating can be constructed at normal temperatures, therefore solved inside and outside can not simultaneously treated problem, but also there is more shortcoming in this aseptic technic: one-pass film-forming thickness has only tens microns, needs repeatedly to spray just can reach desired thickness the technology trouble; Film forming thickness is low, and its antiseptic property is very poor, generally can only use as the drag reduction coating; Still to construct in two steps, promptly carry out outer 3PE anticorrosive coat earlier, remove to spray liquid epoxy again.West-East National Gas Transmission Project adopts this anticorrosion structure and technology exactly, and the outer 3PE anticorrosive coat that is prefabricated in the factory carry out on-the-spot internal layer liquid epoxy spraying application again after pipeline connects, and undercoating also is to use as the drag reduction coating.
3, summary of the invention:
The objective of the invention is to consider the problems referred to above and provide a kind of and on a production line, adopt 2PE or 3PE anticorrosive coat, inwall to adopt the production method of the internal and external anti-corrosive steel-plastics composite pipe that favorable anti-corrosion effect, technology are simple, cost is low of FBE to outer wall of steel pipe simultaneously.
In order to address the above problem, the present invention is achieved through the following technical solutions: production method of the present invention includes the following step:
1) steel pipe with passed examination enters production line by last pipe platform (1);
2) by preheating device (2) steel pipe is carried out preheating;
3) be transported to derusting device in the steel pipe (3) by transmission line after the steel pipe preheating steel pipe inwall is carried out processing of rust removing;
4) by heater (6) steel pipe is carried out preheating again after the steel pipe rust cleaning;
5) steel pipe enters steel pipe inner spray coating device (7) to the pipe inner-wall spraying powdery paints;
6) enter outer rust cleaning unit (10) behind the pipe coating outer wall of steel pipe is carried out outer rust cleaning;
7) by extruding glue-line device (15) and extruding plastic bed device (16) outer wall of steel pipe is pushed outer glue-line and extruding outer plastic layer successively continuously after the outer rust cleaning;
8) by cooling device (17) steel pipe is cooled off, promptly get the internal and external anti-corrosive steel-plastics composite pipe;
Wherein above-mentioned steps 5) behind the pipe inner-wall spraying powdery paints, powdery paints is heating and curing by solidification equipment (8).
Above-mentioned steps 4) after the steel pipe inwall is eliminated rust, also pipeline is carried out internal sweep and the absorption of inner surface micronic dust by interior blow device (4) and inner surface micronic dust adsorbent equipment (5); Step 6) is also carried out internal sweep and the absorption of outer surface micronic dust to pipeline by interior blow device (11) and outer surface micronic dust adsorbent equipment (12) again after outer wall of steel pipe is eliminated rust.
Above-mentioned preheating device (2), heater (6) and heater (13) add thermal recovery Frequency Induction Heating, gas furnace heating, oil burner heating or flame heat to steel pipe, and preheating device (2), heater (6) and heater (13) are provided with automatic temperature control apparatus.
Blow device (4), inner surface micronic dust adsorbent equipment (5), steel pipe inner spray coating device (7) carry out being provided with feedback device (9) behind internal sweep, the absorption of inner surface micronic dust and the pipe inner-wall spraying to pipeline respectively in above-mentioned.
Above-mentioned have the pin hole checkout gear in steel pipe behind the dusty spray, after outer dusty spray and the steel pipe cooling; Above-mentioned steps 8) can carry out the adverse slope mouth by falling beveling machine (18) to the external anti-corrosion layer at cooled steel pipe two ends; Whether the steel pipe behind the adverse slope mouth can qualified by checking that platform (19) detects.
Above-mentioned is 40～80 ℃ to the temperature of carrying out preheating before the rust cleaning of the inside and outside wall of steel pipe; To the temperature of carrying out preheating before the spraying in the steel pipe is 160～250 ℃; To the temperature that heats before the outer spraying of steel pipe is 160～250 ℃; The temperature that is heating and curing behind the above-mentioned pipe inner-wall spraying powdery paints is 160～250 ℃; After the above-mentioned steel pipe surfaces externally and internally rust cleaning pipeline surfaces externally and internally cleannes are reached more than the Sa2 level, depth of abrasion pattern reaches 40～100 μ m.
Compared with prior art, the invention has the beneficial effects as follows: production method of the present invention can realize adopting 2PE or 3PE anticorrosive coat, inwall to adopt FBE to outer wall of steel pipe on a production line simultaneously, the technology of production method of the present invention is simple, cost is low, and is good in economic efficiency.And the inside and outside anticorrosive coating of the steel pipe of producing is best at present inside and outside anticorrosive coating assembled scheme, and its antiseptic effect is splendid.
4, description of drawings:
Fig. 1 is the structural representation of the used production equipment of production method of the present invention.
5, the specific embodiment:
Embodiment:
The production method of internal and external anti-corrosive steel-plastics composite pipe of the present invention, it includes the following step:
1) steel pipe with passed examination enters production line by last pipe platform 1;
2) carry out preheating by 2 pairs of steel pipes of preheating device;
3) be transported to by transmission line after the steel pipe preheating that 3 pairs of steel pipe inwalls of derusting device carry out processing of rust removing in the steel pipe;
4) carry out preheating by 6 pairs of steel pipes of heater again after the steel pipe rust cleaning;
5) steel pipe enters 7 pairs of pipe inner-wall spraying powdery paints of steel pipe inner spray coating device;
6) enter 10 pairs of outer wall of steel pipe of outer rust cleaning unit behind the pipe coating and carry out outer rust cleaning;
7) push outer glue-line and extruding outer plastic layer successively continuously by extruding glue-line device 15 and 16 pairs of outer wall of steel pipe of extruding plastic bed device after the outer rust cleaning;
8) by cooling device 17 steel pipe is cooled off, promptly get the internal and external anti-corrosive steel-plastics composite pipe after the last passed examination, this is the internal and external anti-corrosive steel-plastics composite pipe of outer 2PE, interior epoxy powder.
For obtaining the internal and external anti-corrosive steel-plastics composite pipe of outer 3PE, interior epoxy powder, above-mentioned steps 6) outside to steel pipe the rust cleaning after, also can heat, carry out spray coating powder paint by 14 pairs of steel pipes of outer spray coating device by 13 pairs of steel pipes of heater, carry out the extruding glue-line and the plastic layer of step 7) again, can obtain the anti-corrosive steel tube of outer 3PE, interior epoxy powder.In the present embodiment, above-mentioned preheating device 2, heater 6 and 13 pairs of steel pipe heating of heater can be adopted Frequency Induction Heating, gas furnace heating, oil burner heating or flame heat, and preheating device 2, heater 6 and heater 13 are provided with automatic temperature control apparatus.
For making the inner-wall spraying powder curing effective, above-mentioned steps 5) behind the pipe inner-wall spraying powdery paints, also can be heating and curing by 8 pairs of powdery paints of solidification equipment.In the present embodiment, solidification equipment 8 can be heating furnace.
Above-mentioned steps 4) after the steel pipe inwall is eliminated rust, also can carry out internal sweep and the absorption of inner surface micronic dust by interior blow device 4 and 5 pairs of pipelines of inner surface micronic dust adsorbent equipment; Step 6) also can be carried out internal sweep and the absorption of outer surface micronic dust to pipeline by interior blow device 11 and outer surface micronic dust adsorbent equipment 12 again after outer wall of steel pipe is eliminated rust.
Blow device 4, inner surface micronic dust adsorbent equipment 5, steel pipe inner spray coating device 7 carry out being provided with feedback device 9 behind internal sweep, the absorption of inner surface micronic dust and the pipe inner-wall spraying to pipeline respectively in above-mentioned, reprocess so that the disqualified upon inspection steel pipe is return.
Above-mentioned steel pipe inner spray coating device 7 also is respectively equipped with pin hole checkout gear 20 in to steel pipe behind the dusty spray, after 17 pairs of steel pipes coolings of cooling device, so that coating quality is detected.
Above-mentioned steps 8) can carry out the adverse slope mouth by falling beveling machine 18 to the external anti-corrosion layer at cooled steel pipe two ends, so that pipeline construction.Whether the steel pipe behind the adverse slope mouth can qualified by checking that platform 19 detects.
Above-mentioned is 40～80 ℃ to the temperature of carrying out preheating before the rust cleaning of the inside and outside wall of steel pipe; To the temperature of carrying out preheating before the spraying in the steel pipe is 160～250 ℃; To the temperature that heats before the outer spraying of steel pipe is 160～250 ℃; The temperature that is heating and curing behind the above-mentioned pipe inner-wall spraying powdery paints is 160～250 ℃; After the above-mentioned steel pipe surfaces externally and internally rust cleaning pipeline surfaces externally and internally cleannes are reached more than the Sa2 level, depth of abrasion pattern reaches 50～100 μ m.
The production equipment of internal and external anti-corrosive steel-plastics composite pipe of the present invention, include pipe platform 1, preheating device 2, derusting device 3 in the steel pipe, heater 6, steel pipe inner spray coating device 7, outer rust cleaning unit 10, extruding glue-line device 15, extruding plastic bed device 16, cooling device 17, wherein preheating device 2 places between pipe platform 1 and the interior derusting device 3 of steel pipe, steel pipe inner spray coating device 7 places the side of heater 6, extruding plastic bed device 16 places the side of extruding glue-line device 15, and eliminate rust outward unit 10 and cooling device 17 place extruding glue-line device 15 respectively, the front side of extruding plastic bed device 16 and rear side.
Also be provided with heater 13 that steel pipe is heated and the outer spray coating device 14 that steel pipe is carried out spray coating powder paint between above-mentioned outer rust cleaning unit 10 and the extruding glue-line device 15; The side of steel pipe inner spray coating device 7 also can be provided with the solidification equipment 8 that powdery paints is heating and curing; The side of derusting device 3 also can be provided with interior blow device 4 and the inner surface micronic dust adsorbent equipment 5 that pipeline is carried out internal sweep and the absorption of inner surface micronic dust in the steel pipe; The side of outer rust cleaning unit 10 also can be provided with interior blow device 11 and the outer surface micronic dust adsorbent equipment 12 that pipeline is carried out internal sweep and the absorption of outer surface micronic dust; The side of blow device 4, inner surface micronic dust adsorbent equipment 5, steel pipe inner spray coating device 7 also is provided with feedback device 9 in above-mentioned; Also be respectively equipped with pin hole checkout gear 20 behind above-mentioned steel pipe inner spray coating device 7 backs, the cooling device 17; The side of cooling device 17 also is provided with the inspection platform 19 that falls beveling machine 18 and steel pipe is detected that the external anti-corrosion layer that cools off steel pipe two ends, back is carried out the adverse slope mouth.
Claims (6)
1, a kind of production method of internal and external anti-corrosive steel-plastics composite pipe includes the following step:
1) steel pipe with passed examination enters production line by last pipe platform (1);
2) by preheating device (2) steel pipe is carried out preheating;
3) be transported to derusting device in the steel pipe (3) by transmission line after the steel pipe preheating steel pipe inwall is carried out processing of rust removing;
4) by heater (6) steel pipe is carried out preheating again after the steel pipe rust cleaning;
5) steel pipe enters steel pipe inner spray coating device (7) to the pipe inner-wall spraying powdery paints;
6) enter outer rust cleaning unit (10) behind the pipe coating outer wall of steel pipe is carried out outer rust cleaning;
7) by extruding glue-line device (15) and extruding plastic bed device (16) outer wall of steel pipe is pushed outer glue-line and extruding outer plastic layer successively continuously after the outer rust cleaning;
8) by cooling device (17) steel pipe is cooled off, promptly get the internal and external anti-corrosive steel-plastics composite pipe;
It is characterized in that above-mentioned steps 5) behind the pipe inner-wall spraying powdery paints, powdery paints is heating and curing by solidification equipment (8).
2, the production method of internal and external anti-corrosive steel-plastics composite pipe according to claim 1, it is characterized in that above-mentioned steps 4) after the steel pipe inwall is eliminated rust, also pipeline is carried out internal sweep and the absorption of inner surface micronic dust by interior blow device (4) and inner surface micronic dust adsorbent equipment (5); Step 6) is also carried out internal sweep and the absorption of outer surface micronic dust to pipeline by interior blow device (11) and outer surface micronic dust adsorbent equipment (12) again after outer wall of steel pipe is eliminated rust.
3, the production method of internal and external anti-corrosive steel-plastics composite pipe according to claim 1 and 2, it is characterized in that above-mentioned preheating device (2), heater (6) and heater (13) add thermal recovery Frequency Induction Heating, gas furnace heating, oil burner heating or flame heat to steel pipe, preheating device (2), heater (6) and heater (13) are provided with automatic temperature control apparatus.
4, the production method of internal and external anti-corrosive steel-plastics composite pipe according to claim 3 is characterized in that above-mentioned interior blow device (4), inner surface micronic dust adsorbent equipment (5), steel pipe inner spray coating device (7) carry out being provided with feedback device (9) behind internal sweep, the absorption of inner surface micronic dust and the pipe inner-wall spraying to pipeline respectively.
5, the production method of internal and external anti-corrosive steel-plastics composite pipe according to claim 4 is characterized in that above-mentionedly in steel pipe behind the dusty spray, after outer dusty spray and the steel pipe cooling pin hole checkout gear being arranged; Above-mentioned steps 8) can carry out the adverse slope mouth by falling beveling machine (18) to the external anti-corrosion layer at cooled steel pipe two ends; Whether the steel pipe behind the adverse slope mouth can qualified by checking that platform (19) detects.
6, the production method of internal and external anti-corrosive steel-plastics composite pipe according to claim 4 is characterized in that above-mentioned is 40～80 ℃ to the temperature of carrying out preheating before the rust cleaning of the inside and outside wall of steel pipe; To the temperature of carrying out preheating before the spraying in the steel pipe is 160～250 ℃; To the temperature that heats before the outer spraying of steel pipe is 160～250 ℃; The temperature that is heating and curing behind the above-mentioned pipe inner-wall spraying powdery paints is 160～250 ℃; After the above-mentioned steel pipe surfaces externally and internally rust cleaning pipeline surfaces externally and internally cleannes are reached more than the Sa2 level, depth of abrasion pattern reaches 40～100 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100153183A CN1321798C (en) | 2004-02-10 | 2004-02-10 | Method and apparatus for producing inside and outside anticorrosion steel-plastic composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100153183A CN1321798C (en) | 2004-02-10 | 2004-02-10 | Method and apparatus for producing inside and outside anticorrosion steel-plastic composite pipe |
Publications (2)
| Publication Number | Publication Date |
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| CN1557624A CN1557624A (en) | 2004-12-29 |
| CN1321798C true CN1321798C (en) | 2007-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100153183A Expired - Fee Related CN1321798C (en) | 2004-02-10 | 2004-02-10 | Method and apparatus for producing inside and outside anticorrosion steel-plastic composite pipe |
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| CN (1) | CN1321798C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582165A (en) * | 2012-01-18 | 2012-07-18 | 绵阳东方特种工程塑料有限公司 | Composite steel belt and manufacturing method thereof |
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| CN1327979C (en) * | 2005-02-28 | 2007-07-25 | 王筱均 | Method of rust cleaning, scale removing, film coating and corrosion preventing for large and middle sized pipeline inside wall |
| KR100887710B1 (en) * | 2008-10-30 | 2009-03-11 | 남궁영 | The aluminum tube and process for producing same |
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| CN106179806A (en) * | 2016-09-13 | 2016-12-07 | 天津友发管道科技股份有限公司 | A kind of pipe plastic coating apparatus for production line |
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Patent Citations (5)
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| CN2038052U (en) * | 1988-12-10 | 1989-05-24 | 北京市市政工程研究所 | Multiunit tube with aluminate concrete and sheet steel |
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| CN102582165A (en) * | 2012-01-18 | 2012-07-18 | 绵阳东方特种工程塑料有限公司 | Composite steel belt and manufacturing method thereof |
| CN102582165B (en) * | 2012-01-18 | 2015-07-15 | 绵阳东方特种工程塑料有限公司 | Composite steel belt and manufacturing method thereof |
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| CN1557624A (en) | 2004-12-29 |
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