About the thermoplastic pipe of continuous lod
The utility model relates to glass fibre and pipeline field shaping technique, specifically a kind of thermoplastic pipe about continuous lod.
Nearly ten years, continuous fiber reinforced thermoplastic pipeline (ReinforcedThermoplasticPipes) is the research direction of international pipeline field hot topic always, because it has obviously advantage, the high strength of fiber can be played, bear high pressure, pliability that thermoplastic is good and corrosion resistance can be kept again, have wide market in high-voltage tube application aspect such as oil feed pipe, fuel tube, supplying drainages.
Traditional RTP divides three-decker, and namely inside and outside is extrusioning thermoplastic plastic's layer, and centre is fiber-reinforced layer or steel wire reinforcement layer.The method adopted is first extruded thermoplastic inner tube, then is wound around enhancement layer on internal layer, finally extrudes outer surface protective layer.As described in patent document CN103878990A, the product anti-pressure ability that this method is produced is high, Security is good, but this production line is very long, generally need the long left and right of 80M, thick pipe is strengthened for multilayer and even wants more than 100M, due to higher to fusion technology requirement of heating between layers, control bad, easily there are quality problems, at present, ripe European production line approximately needs 2000-3000 ten thousand RMB, domestic production line is also in development, estimate also to need more than 1,000 ten thousand RMB, this high cost investment, inefficient production hinders the application of RTP.Although the method described in patent document CN102363363A is simple, the online impregnation technology of fiber is also not by far up to the mark at present, and fiber is difficult to soak into, and the product micro gas-bubble produced is too many, can not use as anti-high-voltage product.As fruit fiber adopts braid pattern to strengthen, the party's rule is at all unworkable.
[summary of the invention]
The purpose of this utility model is the defect in order to overcome traditional production glass fiber reinforcement thermoplastic pipe, according to the know-why of thermosetting property pultrusion, in conjunction with thermoplastic extrusion method, thermoplastic film or sheet material is adopted to form internal layer, internal layer is provided with the braiding of preimpregnated thermoplastic silvalin, is wound around and longitudinally configuration formation enhancement layer, internal layer and enhancement layer are provided with skin, outer adopt extruder for shaping, and three-decker is combined together the one-time formed thermoplastic pipe about continuous lod.This toughness of products is good, and resistance to compression is high, steady quality, and corrosion-resistant, long service life, has broad application prospects in fields such as plumbing, fuel tube, oil feed pipes, and the less investment of the method manufacturing mechanism, and occupied ground is little, has important use value.
To achieve these goals, design a kind of thermoplastic pipe about continuous lod, this pipeline strengthens construction layer by the braiding in thermoplastic inner layer and internal layer, and outer thermoplasticity protective layer composition is provided with on internal layer and enhancing construction layer, described three-decker is by pultrusion and extrude mixed method once-through, and described internal layer adopts thermoplastic film or sheet material to form; Described enhancement layer adopts the braiding of preimpregnated thermoplastic silvalin, is wound around and longitudinally configures formation; Described skin adopts thermoplastic material to extrude with extruder on interior pipe and enhancement layer and forms, and three-decker is combined together; Described pipeline specifications is below D1000mm, uses pressure 1-15MPa.
Described internal layer is made up of with winding or longitudinal mode thermoplastic film or sheet material, and at melting temperature, form overall internal layer, thickness is about 0.2-2mm.
Described enhancement layer is undertaken weaving by designing requirement, be wound around, be longitudinally configured on internal layer by the fiber being soaked with thermoplastic material in advance, and its thickness is determined by requirement of strength.
Described skin adopts thermoplastic material when internal layer and enhancement layer melting, extrudes feed supplement, three-decker is combined together with extruder pressurization, and form on its surface the thermoplasticity protective layer that thickness is 0.5-2mm.
Described fiber is adopted as glass fibre or basalt fibre or carbon fiber or aramid fibre etc.
Described thermoplastic material is PVC or PE or HDPE or PP or PA or other modified thermoplastic matrixes.
The utility model compared with the existing technology, product structure design is reasonable, retain existing RTP three-decker, but an one-time formed complete entirety, creationary employing pultrusion/extrude mixed method to produce a kind of brand-new product, and make quality of product obtain a leap, quality of product is more stable, there is very high compressive strength and impact resistance, the inside and outside layer thickness of product can reach about 0.5mm, this is that traditional RTP cannot realize, and greatly reduces product cost, can continuous seepage.
[accompanying drawing explanation]
Fig. 1 is cross-sectional configuration schematic diagram of the present utility model;
Fig. 2 is the structural representation of production line of the present utility model;
In Fig. 1: pipe in 21. outer tube 22. enhancement layers 23.;
In Fig. 2: 1. heating stick 11. shaping cover 12. vacuum shaping box 13. cooler bin 14. tractor 15. cutting machine in knitting machine 3. Stetch Wrapping Machine 4. outer knitting machine 5. core 6. outer mold 7. heating collar 8. screw extruder 9. extrusion die 10. in inner thermoplastic layer 2.;
Specify Fig. 1 as Figure of abstract of the present utility model.
Below in conjunction with accompanying drawing, the utility model is described in further detail, and the structure of this device and principle are very clearly concerning the people of this specialty.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, pipeline in the utility model weaves enhancement layer structure by internal layer and internal layer, enhancement layer structure is provided with skin, three-decker once-through forms, internal layer adopts thermoplastic film or sheet material to form, and enhancement layer adopts the braiding of preimpregnated thermoplastic silvalin, is wound around and longitudinally configures formation; Outer when the thermoplastic material melting of internal layer and enhancement layer, extrude feed supplement with extruder pressurization, three-decker is combined together, and form thermoplasticity protective layer on surface.Pipeline specifications is below D1000mm, and use pressure is 1-15MPa, and fiber is adopted as glass fibre, basalt fibre, carbon fiber, aramid fibre etc.Thermoplastic material is PVC, PE, HDPE, PP, PA or modified thermoplastic matrix.
Production line designed by the utility model is as Fig. 1, first coated inner thermoplastic layer on the core of front end, then be the multi-ply fibrous structure of the interior braiding of fiber, winding, outer braiding compound, stage casing is the core place that the external mold of heating and core and extruder, die head, interior heating are formed jointly, and back segment is that thermoplastic produces general vacuum shaping box, cooler bin, tractor, cutting machine etc.
Concrete production method is: be first evenly coated on core 5 by thermoplastic film or sheet material, to the fiber of thermoplasticity prepreg be had to be woven by interior knitting machine 2 again, then Stetch Wrapping Machine 3 carries out winding hoop layer, woven by outer knitting machine 4 again, form multilayer and strengthen structure, under tractor 14 acts on, send into the interior heating of die cavity of heating internal mold 5, external mold 6, heating-up temperature is determined according to different materials, the thermoplastic material of fiber surface is made to reach molten state, merge die head 9 sections with the thermoplastic material extruded by screw extruder 8, formed overall.Die head heating is completed jointly by additional gas ket 7 and interior heating stick 10, pipeline is out shaped through shaping cover 11 and vacuum shaping box 12, then cools completely through cooler bin 13, enters cutting machine 15 finally by tractor 14, length is cut on request, becomes finished product.