CN105666843A - Hot-extrusion circumferential winding forming method of steel bend pipe 3PE coating - Google Patents
Hot-extrusion circumferential winding forming method of steel bend pipe 3PE coating Download PDFInfo
- Publication number
- CN105666843A CN105666843A CN201610155172.5A CN201610155172A CN105666843A CN 105666843 A CN105666843 A CN 105666843A CN 201610155172 A CN201610155172 A CN 201610155172A CN 105666843 A CN105666843 A CN 105666843A
- Authority
- CN
- China
- Prior art keywords
- bend pipe
- hot
- layer
- polyethylene
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/78—Winding and joining, e.g. winding spirally helically using profiled sheets or strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/84—Heating or cooling
- B29C53/845—Heating or cooling especially adapted for winding and joining
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/16—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings the coating being in the form of a bandage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/02—Applying the material on the exterior of the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2507/00—Polyolefins
- B05D2507/01—Polyethylene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a hot-extrusion circumferential winding forming method of a steel bend pipe 3PE coating. A continuous forming process consisting of electrostatic epoxy powder spraying of a bottom layer, adhesive powder spraying of an intermediate layer, extruding and hot winding of a polyethylene outer protective layer, rolling, air cooling, and water cooling is adopted to realize extruding and hot winding of the polyethylene outer protective layer in a bent pipe 3PE anticorrosion coating, and finally form a three-layer integrated structure. The hot-extrusion circumferential winding forming method of the steel bend pipe 3PE coating effectively solves the problem of difficult control on the anticorrosion quality of an existing bent pipe 3PE anticorrosion coating. By means of advanced process techniques, the integrity and the bonding strength of the three-layer structure are greatly improved, which has profound significance for future improvement of the overall quality of an entire long-distance transmission pipeline.
Description
Technical field
The invention belongs to steel tube surface coating process, it is steel bend pipe three layers of anticorrosion structure field shaping technique specifically, a kind of hot-extrudable 3PE coating forming method.
Background technology
3PE coating, because of its scope of application and excellent barrier propterty widely, is the most advanced outer anticorrosive coating generally acknowledged at present. 3PE coating has also been widely used in the long-distance transport pipes such as oil-gas transportation, water supply at home.
Being coated with formable layer for the 3PE of straight pipe in long-distance transport pipes, at present mainly based on hot-extrudable winding process or hot-extrudable annular cladding process, its technological process is quite ripe, and coating quality is conformance with standard requirement completely also. and outer anticorrosion for bend pipe, due to the impact by processing condition, although achieving 3PE paint coating (Chinese patent CN202040483U), but due in coating moulding process, after heating in medium frequency, the heat of steel pipe body is except melting epoxy powder, the caking agent also needing melting prefabricated and polyethylene compound adhesive tape, for ensureing the complete melting of internal layer of outermost layer polyethylene tape, bend pipe is needed to be heated to more than 270 DEG C, and in winding process, also need to adopt external thermal source that composite band is carried out preheating, and to the high temperature added by bend pipe, not only can affect the change of elbow body material, also can cause the premature cure of the epoxy powder sprayed before carrying out composite band winding, thus affect the bonding strength and cathodic disbonding intensity etc. of 3PE coating, cause the inefficacy of long-distance transport pipes long-time running process floating coat, increase the probability of pipeline corrosion. in sum, existing bend pipe 3PE corrosion protection coating forming technique falls behind, and anticorrosive quality is difficult to control, can not meet the requirement of long distance pipeline 3PE aseptic technic development completely, the anticorrosion anticorrosion thin spot having become long-distance transport pipes of bend pipe, the preservative effect negative impact of whole long-distance transport pipes is very big.
Summary of the invention
For the present situation of above-mentioned bend pipe corrosion protection coating forming technique, it is an object of the invention to provide a kind of steel bend pipe 3PE hot-extrudable circumference winding, molding method. Heat is wound around, rolls, air knife cools, water cooling continuous forming process to adopt bottom epoxy powder electrostatic spraying, middle layer adhesive powder electrostatic spraying, outer protective polyethylene layer plunger-type extruder to extrude.
The object of the present invention can be realized by following measure:
A kind of steel bend pipe 3PE hot-extrudable circumference winding, molding method, its step is the extrusion channel rapid abutting joint that the plunger-type extruder being installed on circular orbit injects runner and single screw extrusion machine, the polyethylene of melting is injected plunger-type extruder, after filling the cavity of plunger-type extruder, disconnects the connection of runner;By rust cleaning after bend pipe lie in a horizontal plane in adapt with bend pipe radius-of-curvature annulus arrange transmission roller on, along the circumferential direction move with the speed of 1 m/min, through the heating intermediate frequency heat circle being arranged on circular drive line circumferential direction, bend pipe is heated, the spraying storehouse of epoxy powder spray equipment is entered after making bend pipe surface temperature reach 180 DEG C～200 DEG C, epoxy powder is evenly sprayed and deposits to bend pipe surface by the powder static electricity spray gun that spraying storehouse is circular layout, and melting forms the epoxy powder layer of thickness 120 μm～140 μm, tackiness agent is evenly sprayed on that applied and is in the epoxy powder layer surface of molten state by the adhesive powder spray gun that bend pipe is arranged by caking agent powder case annular again, forms thickness 170 μm～190 μm tackiness agent middle layers, start on circular orbit the rotating machine installed, drive speed reducer drives plunger-type extruder to make it by clockwise direction with 30 ~ 70 turns of rotations on circular orbit in every minute, opening plunger formula forcing machine simultaneously, it is made to be extruded the polyethylene injecting in cavity under oil cylinder effect by flat plate mold, to extrude thickness is that 2mm～3mm polyethylene band heat is wound into tackiness agent interlayer surfaces, form outer protective polyethylene layer, the polyethylene band of heat is rolled by milling roller wheel, make outer jacket and middle layer, bottom is fitted completely, by circular air knife and water-cooling system annular spraying cooling, sizing becomes one-piece construction, so far complete the spraying of steel bend pipe preservative coat and extrude heat winding sizing.
The advantage of the present invention and the useful effect of generation be:
1, the outer protective polyethylene layer of bend pipe shaping is rotated on circular orbit by plunger-type extruder and extrude the banded film heat of the thick polyethylene of 2mm～3mm and be wrapped in adhesive layer surface, forms outer protective polyethylene layer. Whole technique adopts mechanical automation, flow process is connected step by step, sequentially carry out the winding of bottom epoxy powder electrostatic spraying, middle layer adhesive powder electrostatic spraying, outer protective polyethylene layer, greatly improve the globality of the three-decker of bend pipe, bonding strength and antiseptic power, effectively solve the problem of the rotten difficult quality control of existing bend pipe 3PE corrosion protection coating.
2, the present invention is compared with existing bend pipe 3PE coating moulding process, it is possible to the 3PE coating meeting caliber φ 426 ~ φ 1420 and above bend pipe is shaping online. Achieve automatization and the mass-producing of the anticorrosion production of bend pipe 3PE, greatly improve the anticorrosion production efficiency of bend pipe, reduce production cost, add economic benefit, it is to increase the reliability of long-distance transport pipes long-time running.
Accompanying drawing explanation
Fig. 1 process flow diagram of the present invention
Fig. 2 technical process vertical planning drawing of the present invention
Fig. 3 the present invention extrudes winding sectional view
In figure: 1 transmission roller, 2 cooling basins, 3 single screw extrusion machines, 4 water-cooling systems, 5 air knives, 6 milling roller wheels, 7 flat plate molds, 8 circular orbits, 9 binder powder spray guns, 10 electrostatic guns, 11 heating intermediate frequencies, 12 bend pipes, 13 epoxy powder spray equipments, 14 polyethylene bands, 15 plunger-type extruders
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described again:
A kind of steel bend pipe 3PE hot-extrudable circumference winding, molding method, before the steps include: paint coating, plunger-type extruder 15 inject runner inlet end install quick access device be connected with single screw extrusion machine 3 extrusion channel exit end installation quick access device rapid abutting joint and fastening after, start single screw extrusion machine 3 and the polyethylene of melting is injected plunger-type extruder 15, stop single screw extrusion machine 3, disconnect quick access device, complete preparation work.By rust cleaning after bend pipe 12 lie in a horizontal plane in adapt with bend pipe radius-of-curvature annulus arrange transmission roller 1 on, along the circumferential direction move with 1 m/min of speed, through the heat circle of the heating intermediate frequency 11 being arranged on circular drive line circumferential direction, bend pipe 12 is heated, the spraying storehouse of epoxy powder spray equipment 13 is entered after making bend pipe 12 surface temperature reach 180 DEG C～200 DEG C, epoxy powder is evenly sprayed and deposits to bend pipe 12 surface by the powder static electricity spray gun 10 that spraying storehouse is circular layout, and melting forms the epoxy powder layer of thickness 120 μm～140 μm; The adhesive powder spray gun 9 that bend pipe 12 is arranged by caking agent powder case annular again tackiness agent is evenly sprayed on be coated in be in molten state epoxy powder layer on the surface, form thickness 170 μm～190 μm tackiness agent middle layers; Start on circular orbit 8 rotating machine installed, drive speed reducer drives plunger-type extruder 15 to make it by clockwise direction with 30 ~ 70 turns of rotations on circular orbit 8 in every minute, and on circular orbit 8, polyethylene band 14 heat extruded is wound into tackiness agent interlayer surfaces by the plunger-type extruder 15 of circumferential motion. When carrying out polyethylene band 14 and be wound around, plunger-type extruder 15 inject runner inlet end install quick access device be connected with single screw extrusion machine 3 extrusion channel exit end installation quick access device rapid abutting joint and fastening after, start single screw extrusion machine 3 and the polyethylene of melting is injected self with attemperator plunger-type extruder 15, stop single screw extrusion machine 3, disconnect quick access device; Molten polyethylene is passed through connected flat plate mold 7 polyethylene extrusion band 14 by plunger-type extruder 15 under oil cylinder working-pressure effect, the plunger-type extruder 15 driven by step-down gear does every minute 30 ~ 70 turns turns clockwise on circular orbit 8, to extrude thickness is that 2mm～3mm polyethylene band 14 heat is wound into formed adhesive layer surface, final formation outer protective polyethylene layer. Winding polyethylene band 14 is turned clockwise by milling roller wheel 6 and rolls the polyethylene band 14 of heat, epoxy powder bottom, middle layer adhesive powder and outer protective polyethylene layer is fitted completely, grinding compacting. By circular air knife 5 and water-cooling system 4, winding 3PE bend pipe 12 being carried out annular spraying cooling again, sizing becomes one-piece construction. So far complete the spraying of steel bend pipe 3PE preservative coat and extrude heat winding sizing.
Plunger-type extruder 15, in working process, opens the heating unit installed, it is ensured that the polyethylene in cavity is in about 200 DEG C of melting extrudable condition always; The recovery system installed on epoxy powder spray equipment 13 reclaims in powder spraying process the unnecessary powder produced, and discharges uncontaminated air through filtering; The water that spraying cooling produces is from flowing into cooling basin 2, and sends into water-cooling system 4 by water pump and complete recycle.
Claims (1)
1. a steel bend pipe 3PE hot-extrudable circumference winding, molding method, its step is the extrusion channel rapid abutting joint that the plunger-type extruder (15) being installed on circular orbit (8) injects runner and single screw extrusion machine (3), the polyethylene of melting is injected plunger-type extruder (15), after filling the cavity of plunger-type extruder (15), disconnects the connection of runner, by rust cleaning after bend pipe (12) lie in a horizontal plane in adapt with bend pipe radius-of-curvature annulus arrange transmission roller (1) on, along the circumferential direction move with the speed of 1 m/min, through heating intermediate frequency (11) the heat circle being arranged on circular drive line circumferential direction, bend pipe (12) is heated, the spraying storehouse of epoxy powder spray equipment (13) is entered after making bend pipe (12) surface temperature reach 180 DEG C～200 DEG C, epoxy powder is evenly sprayed and deposits to bend pipe (12) surface by the powder static electricity spray gun (10) that spraying storehouse is circular layout, melting forms the epoxy powder layer of thickness 120 μm～140 μm,Bend pipe (12) again by caking agent powder case annular arrange adhesive powder spray gun (9) tackiness agent is evenly sprayed on that applied and be in molten state epoxy powder layer surface, formed thickness 170 μm～190 μm tackiness agent middle layers, start the upper rotating machine installed of circular orbit (8), drive speed reducer drives plunger-type extruder (15) to make it by clockwise direction with 30 ~ 70 turns of rotations on circular orbit (8) in every minute, opening plunger formula forcing machine (15) simultaneously, it is made to extrude, by flat plate mold (7), the polyethylene injecting in cavity under oil cylinder effect, to extrude thickness is that 2mm～3mm polyethylene band (14) heat is wound into tackiness agent interlayer surfaces, form outer protective polyethylene layer, the polyethylene band (14) that (6) roll heat is taken turns by milling roller, make outer jacket and middle layer, bottom is fitted completely, by circular air knife (5) and water-cooling system (4) annular spraying cooling, sizing becomes one-piece construction, so far complete the spraying of steel bend pipe preservative coat and extrude heat winding sizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155172.5A CN105666843B (en) | 2016-03-18 | 2016-03-18 | A kind of hot-extrudable circumferentially wound forming methods of steel bend pipe 3PE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155172.5A CN105666843B (en) | 2016-03-18 | 2016-03-18 | A kind of hot-extrudable circumferentially wound forming methods of steel bend pipe 3PE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105666843A true CN105666843A (en) | 2016-06-15 |
| CN105666843B CN105666843B (en) | 2018-02-09 |
Family
ID=56214929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610155172.5A Active CN105666843B (en) | 2016-03-18 | 2016-03-18 | A kind of hot-extrudable circumferentially wound forming methods of steel bend pipe 3PE |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105666843B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107553939A (en) * | 2017-09-30 | 2018-01-09 | 福清市融城益峰机械有限公司 | The heat-insulated equal heat structure of the Wrapping formed machine wind-curtain type of fiber conduit |
| CN108454082A (en) * | 2018-04-04 | 2018-08-28 | 洛阳理工学院 | A kind of bend winding machine anti-corrosion composite band is wrapped around device |
| CN110494227A (en) * | 2017-03-31 | 2019-11-22 | 因普罗考特控股有限公司 | For coating the method and coating equipment of pipe |
| CN111070744A (en) * | 2019-12-28 | 2020-04-28 | 天津天地龙管业股份有限公司 | Production method of high-performance spraying winding heat preservation pipe |
| CN111113841A (en) * | 2019-12-31 | 2020-05-08 | 无锡中油瑞德防腐科技有限公司 | 3LPE winding system of steel pipe fitting |
| CN112092424A (en) * | 2020-09-09 | 2020-12-18 | 中国石油天然气集团有限公司 | Bent pipe coating method and technological process |
| CN112519173A (en) * | 2020-11-17 | 2021-03-19 | 四川庆达实业集团有限公司 | Hot bending bend cladding formula 3LPE coating equipment |
| CN112856101A (en) * | 2021-01-27 | 2021-05-28 | 河北省盐山县电力管件有限公司 | Steel hot bending bend welding seam three-layer polyethylene anticorrosive coating compensation device |
| CN113021871A (en) * | 2021-03-11 | 2021-06-25 | 罗波昌 | Elbow adhesive tape winding device adopting arc swinging mode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384377A (en) * | 2006-02-22 | 2009-03-11 | 超科有限公司 | Coating method for pipe having weld bead |
| CN101893153A (en) * | 2010-07-07 | 2010-11-24 | 廊坊市管道人机械设备有限公司 | Bend antiseptic finish processing device |
| CN102107176A (en) * | 2010-09-02 | 2011-06-29 | 中油管道防腐工程有限责任公司 | Coating process for pipeline three-layer structural anticorrosive coating |
| CN202040483U (en) * | 2011-03-29 | 2011-11-16 | 天华化工机械及自动化研究设计院 | Forming device for three-layer polyethylene anticorrosive coatings of large-caliber steel bend |
-
2016
- 2016-03-18 CN CN201610155172.5A patent/CN105666843B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384377A (en) * | 2006-02-22 | 2009-03-11 | 超科有限公司 | Coating method for pipe having weld bead |
| CN101893153A (en) * | 2010-07-07 | 2010-11-24 | 廊坊市管道人机械设备有限公司 | Bend antiseptic finish processing device |
| CN102107176A (en) * | 2010-09-02 | 2011-06-29 | 中油管道防腐工程有限责任公司 | Coating process for pipeline three-layer structural anticorrosive coating |
| CN202040483U (en) * | 2011-03-29 | 2011-11-16 | 天华化工机械及自动化研究设计院 | Forming device for three-layer polyethylene anticorrosive coatings of large-caliber steel bend |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110494227A (en) * | 2017-03-31 | 2019-11-22 | 因普罗考特控股有限公司 | For coating the method and coating equipment of pipe |
| CN110494227B (en) * | 2017-03-31 | 2022-03-18 | 因普罗考特控股有限公司 | Method for coating a pipe and coating device |
| CN107553939A (en) * | 2017-09-30 | 2018-01-09 | 福清市融城益峰机械有限公司 | The heat-insulated equal heat structure of the Wrapping formed machine wind-curtain type of fiber conduit |
| CN107553939B (en) * | 2017-09-30 | 2023-07-07 | 福清市融城益峰机械有限公司 | Air curtain type heat insulation soaking structure of fiber pipeline winding forming machine |
| CN108454082A (en) * | 2018-04-04 | 2018-08-28 | 洛阳理工学院 | A kind of bend winding machine anti-corrosion composite band is wrapped around device |
| CN111070744A (en) * | 2019-12-28 | 2020-04-28 | 天津天地龙管业股份有限公司 | Production method of high-performance spraying winding heat preservation pipe |
| CN111113841A (en) * | 2019-12-31 | 2020-05-08 | 无锡中油瑞德防腐科技有限公司 | 3LPE winding system of steel pipe fitting |
| CN112092424A (en) * | 2020-09-09 | 2020-12-18 | 中国石油天然气集团有限公司 | Bent pipe coating method and technological process |
| CN112519173A (en) * | 2020-11-17 | 2021-03-19 | 四川庆达实业集团有限公司 | Hot bending bend cladding formula 3LPE coating equipment |
| CN112519173B (en) * | 2020-11-17 | 2022-06-14 | 天华化工机械及自动化研究设计院有限公司 | Hot bending bend cladding formula 3LPE coating equipment |
| CN112856101A (en) * | 2021-01-27 | 2021-05-28 | 河北省盐山县电力管件有限公司 | Steel hot bending bend welding seam three-layer polyethylene anticorrosive coating compensation device |
| CN113021871A (en) * | 2021-03-11 | 2021-06-25 | 罗波昌 | Elbow adhesive tape winding device adopting arc swinging mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105666843B (en) | 2018-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105666843A (en) | Hot-extrusion circumferential winding forming method of steel bend pipe 3PE coating | |
| CN103016856B (en) | Fiber mesh tape-wound and reinforced composite pipe, preparation process and device | |
| CN103072268B (en) | Spraying and winding molding method for anti-corrosion thermal insulation blanket of steel pipeline | |
| CN103542197B (en) | The Coating Production Line of a kind of steel pipe corrosion-proof erosion and coated technique | |
| CN104019295A (en) | Steel frame steel-plastic composite pipe and manufacturing method and production line of steel frame steel-plastic composite pipe | |
| CN101430029B (en) | Composite steel pipe with plastic tape winded externally and plastic coated internally, and its processing method | |
| CN108296136A (en) | The full powder forming units of steel pipe 3PE and moulding process | |
| CN106594406A (en) | Lining plastic pipe cast iron pipe and manufacturing method thereof | |
| CN102052543A (en) | Composite polyethylene (PE) powder thermally sprayed anticorrosion coating for petroleum and natural gas pipe | |
| WO2011016750A1 (en) | Method for applying thermoplastic coatings to the internal surface of metallic pipes and apparatus for carrying out said method | |
| CN111720630A (en) | LNG low-temperature prefabricated cold insulation pipe and manufacturing method thereof | |
| CN203297785U (en) | Enhanced thermoplastic pipe | |
| CN109383051A (en) | A kind of continuously collinearly formula spraying winding prefabricated direct-buried thermal insulation pipe production line and its application | |
| CN110328822A (en) | A kind of insulating tube and its extrusion die and manufacturing method | |
| CN101139719A (en) | Composite winding belt for steel pipe out-shell conservation and method for producing and using same | |
| CN201314416Y (en) | Compound steel pipe with outer wall wound with plastic tape and inner wall sprayed with plastic, as well as process equipment | |
| CN205705372U (en) | A kind of steel bend pipe facade transmission heat is wound around 3PE shaped device | |
| JP6578054B2 (en) | Injection stack molding equipment for polymer piping | |
| CN201361597Y (en) | Integrated heating, powder-spraying and film-forming device for internal wall of steel tube | |
| CN109248842A (en) | Single layer, outer dual-layer epoxy powder spraying method in steel pipe | |
| CN206139380U (en) | Large -diameter steel pipe inside and outside wall anticorrosion production line more than DN1400mm | |
| CN109291391B (en) | Production process of silicon core pipe with information wire | |
| CN203585589U (en) | Coating production line preventing steel pipe from corrosion | |
| CN102059799A (en) | Production method for multilayer composite plastic pipes and production line thereof | |
| CN212564779U (en) | Novel low-temperature prefabricated cold insulation pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |