CN203571244U - Tensile RTP pipe - Google Patents
Tensile RTP pipe Download PDFInfo
- Publication number
- CN203571244U CN203571244U CN201320697956.2U CN201320697956U CN203571244U CN 203571244 U CN203571244 U CN 203571244U CN 201320697956 U CN201320697956 U CN 201320697956U CN 203571244 U CN203571244 U CN 203571244U
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- layer
- enhancement layer
- rtp
- tension
- stretch
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- 239000010410 layer Substances 0.000 claims abstract description 88
- 238000004804 winding Methods 0.000 claims abstract description 25
- 239000011241 protective layer Substances 0.000 claims abstract description 22
- 239000004753 textile Substances 0.000 claims description 33
- 229920001903 high density polyethylene Polymers 0.000 claims description 32
- 239000004700 high-density polyethylene Substances 0.000 claims description 32
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000004760 aramid Substances 0.000 claims description 4
- 229920003235 aromatic polyamide Polymers 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract 1
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- 238000000034 method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011900 installation process Methods 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008485 antagonism Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004023 plastic welding Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model relates to a tensile RTP pipe which comprises an inner pipe and a reinforcing layer arranged on the inner pipe in a wound mode. The reinforcing layer is wrapped by a protective layer and formed by two winding bands which are arranged on the outer wall of the inner pipe in a wound mode in opposite winding directions with preset winding angles, and a tensile layer is arranged between the reinforcing layer and the protective layer, and composed of a set of pre-tensioned axial fiber ropes which are evenly distributed in the circumference direction. The tensile RTP pipe has the advantages of being high in tensile performance and flexibility, resistant to the high pressure and the corrosion, safe, reliable and the like, is once formed according to the manufacturing technology, and is short in production cycle and high in production efficiency.
Description
Technical field
The utility model relates to a kind of RTP pipe, especially a kind of for interspersed tension RTP pipe, belongs to fluid delivery pipeline technical field.
Background technique
Existing interspersed RTP pipe (claiming again reinforced thermoplastics pipe), mainly that high-density polytene pipeline is inserted in the old pipeline that needs to repair, utilizing rigidity and the intensity of old pipeline is load-carrying construction, and the feature such as corrosion-resistant, wear-resistant, the resistance to infiltration that utilizes that high density polyethylene pipe has, form " pipe-in-pipe " composite structure, make pipeline after repairing possess the combination property of steel pipe and high density polyethylene (HDPE).The method is low to the cleaning requirement of old pipeline, pigging time and input have been reduced, not only short construction period, expense are low, also can realize the long distance of pipeline lays, the joint quantity of pipeline is dropped to minimum, and then reduced user cost, after repairing, the reliability of pipeline is improved to greatest extent simultaneously.And for old iron pipe or the steel pipe of seriously corroded or leakage, its liner RTP pipe can reach and recover pipeline function, the object increasing the service life.Liner RTP pipe is in the market mainly used in low pressure, the occasion of low-tension, and using scope is relatively limited to.In benthal oil-gas pipeline, land intert the installation process of inner tube etc., pipeline will bear larger axial tensile force, and because ocean current and wave effect are also born large random axial tensile force by pipelines such as making marine riser, ocean cross-over connection pipeline.The pipeline of the use such as marine oil and gas pipeline, land interspersed inner tube, marine riser and ocean cross-over connection pipeline mostly at present is RTP pipe, yet existing RTP pipe only can bear a small amount of instantaneous axial tension, its resistance to tension does not reach the usage requirement of afore mentioned rules far away, moreover, when RTP pipe bears axial tension, the winding angle of equilibrium of its reinforcing band will diminish, and contraction radially appears in pipeline, thus bearing capacity and the working life of having reduced pipeline.
model utility content
The technical problems to be solved in the utility model is the defect existing according to prior art, a kind of tension RTP pipe is proposed, the work loads that fluid is carried not only can be born, the axial tensile force that hauled load in pipeline installation process and environmental factor cause can also be under the prerequisite that does not affect pipeline transportation performance, born.
The utility model is technical solution problem by the following technical programs; a kind of tension RTP pipe; comprise inner tube and be wound around enhancement layer on inner pipe; described enhancement layer outer wrapping protective layer; described enhancement layer consists of two take-up straps that are wrapped in outer wall of inner tube from contrary rotation direction with predetermined winding angle; between described enhancement layer and protective layer, be provided with stretch-resisting layer, described stretch-resisting layer is comprised of one group of circumferential uniform pre-tensioner axial textile rope.
RTP pipe of the present utility model is composited by four-layer structure, and wherein inner tube plays the effect of carrying fluid, and inner tube adopts high density polyethylene (HDPE), not only can guarantee the compactness that fluid is carried, also have corrosion-resistant, low wearing and tearing, the advantages such as good sealing effect; Enhancement layer plays the effect of bearing interior pressure, and then guarantees when RTP pipe is subject to interior pressure not deform; Stretch-resisting layer can bear pipeline installed load and environment random load, and the textile rope that forms stretch-resisting layer need to be carried out pre-tensioner processing, to guarantee the maximization of tension force in using process; Protective layer can protect each load-carrying construction of pipeline injury-free in installation and using process.Like this, the axial tensile force of pipeline discharge pressure and installed load and the generation of environment random load is treated respectively, fluid conveying pressure is mainly born by enhancement layer, and axial tensile force is mainly born by stretch-resisting layer, to realize the rational division of work of pipeline working stress under different loads state, make RTP pipe not only can bear the pressure loading that pipeline is carried fluid, can also bear the hauled load of pipeline installation process and the axial tensile force that environmental factor causes, and then make pipeline under the prerequisite of not damaging fluid transportation performance, increase substantially its resistance to tension.Meanwhile, RTP pipe, when having the interspersed pipe of common polythene advantage, can also meet in high pressure and high tensile strength situation and use.
The utility model is further technical solution problem by the following technical programs:
Aforesaid tension RTP pipe, wherein said winding angle is 50～60 °.
Aforesaid tension RTP pipe, the pre-tensioner stress of wherein said textile rope is 180～220 newton.
Aforesaid tension RTP pipe, the circumferential interval of wherein said pre-tensioner textile rope is more than or equal to 2mm.Make like this, the protective layer of RTP pipe can be bonding with enhancement layer, and make stretch-resisting layer can bear preferably axial pressure.
In general, when pipe fitting is subject to axial tension, the spiral winding angle of pipe fitting enhancement layer will change (generally diminishing), the ability of bearing pressure loading reduces, and then cause pipe fitting to be out of shape, gently make pipe fitting internal diameter diminish, affect flowing medium transmission, heavy cause whole pipe fitting fracture failure.Like this, in stretch-resisting layer, the pre-tensioner textile rope of axial distribution can avoid installed load to act on RTP pipe itself, when being subject to axial tension, do not affect RTP pipe anti-in the usability of external pressure.
Aforesaid tension RTP pipe, wherein said take-up strap is the compound strip that aramid fibre and high density polyethylene (HDPE) form.High density polyethylene (HDPE) (being called for short HDPE) is that in main chain, average every 1000 carbon atoms are only containing several side chains, and density is generally 0.946～0.976g/cm
3polyethylene.
Aforesaid tension RTP pipe, wherein said enhancement layer is bonded on the outer wall of inner tube of extrusion molding shaping by hot melting way, and described stretch-resisting layer is bonded in enhancement layer appearance by hot melting way, and described enhancement layer is extruded coated high density polyethylene (HDPE) outward again and is formed protective layer.High density polyethylene (HDPE) is PE100 or PE80.
RTP pipe of the present utility model not only can bear the pressure loading that pipeline is carried fluid, can also bear the hauled load of pipeline installation process and the axial tensile force that environmental factor causes, there is the advantages such as tensility is high, flexibility is high, high pressure resistant, corrosion-resistant and safe and reliable simultaneously, its preparation process once-through, without turnover, with short production cycle, manufacturing efficiency is high, process loss is little, can be used as the interspersed inner tube in benthal oil-gas pipeline, marine riser, ocean cross-over connection pipeline and land etc., be particularly useful for the transformation reparation of old pipeline.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is an embodiment's of the utility model structural representation.
Fig. 2 is the structural representation of inner tube in the utility model.
Fig. 3 is the structural representation of enhancement layer take-up strap in the utility model.
Fig. 4 is stretch-resisting layer and protective layer flow process chart in the utility model.
Embodiment
Embodiment one
The tension RTP pipe of the present embodiment, its structure as depicted in figs. 1 and 2, comprise inner tube 1 and be wrapped in the enhancement layer 2 in inner tube 1, enhancement layer 2 consists of two take-up straps that are wrapped in inner tube 1 outer wall from contrary rotation direction with predetermined winding angle, and wherein winding angle is 54.7 °.Enhancement layer 2 outer wrapping protective layers 4, between enhancement layer 2 and protective layer 4, be provided with stretch-resisting layer 3, stretch-resisting layer 3 is comprised of one group of circumferential uniform pre-tensioner axial textile rope 8, textile rope 8 is pre-tensioner by tensioning device, the pre-tensioner stress of textile rope 8 is 200 newton, textile rope after pre-tensioner 8 is evenly arranged in to enhancement layer 2 outer surfaces by wire feeder 5 along conduit axis direction, and the circumferential interval of pre-tensioner textile rope 8 (being the spacing of arranging of adjacent two textile rope) is 2mm, so that the protective layer 4 of RTP pipe can be bonding with enhancement layer 2, and stretch-resisting layer 3 can bear axial pressure preferably.In addition, take-up strap is that aramid fibre 21 is PE80 with its material rate of high density polyethylene (HDPE) 22() the compound strip (see figure 3) that forms.Enhancement layer 2 is bonded on inner tube 1 outer wall of extrusion molding shaping by hot melting way; stretch-resisting layer 3 is bonded in enhancement layer 2 appearances by hot melting way; outer the extruding again of enhancement layer 2 is coated high density polyethylene (HDPE) formation protective layer 4, and wherein the material rate of high density polyethylene (HDPE) is PE100 or PE80.
While making RTP tension pipe, first by material rate, be that the high density polyethylene (HDPE) of polythene PE 80 or PE100 is in extruder hopper is put inner tube extruder into, and it is heated (temperature is 180～230 ℃) and shears compression and process, obtain viscous state material, the extrusion system of extruder carries out extrusion modling to viscous state material and processes rear cooling and shaping, obtains inner tube 1; The winding angle according to 54.7 ° is wrapped in inner tube 1 outer wall from contrary rotation direction by two high strength take-up straps to adopt spiral winding machine, forms enhancement layer 2.After enhancement layer 2 machines, it is carried out to Plastic Welding, adopting interlayer heating welding machine internally to manage 1 heats with the enhancement layer 2 being coated on outside inner tube 1, until the high density polyethylene (HDPE) of inner tube 1 and enhancement layer 2 is fused together, inner tube 1 and enhancement layer 2 are bonded together.Secondly, by be positioned at one group of textile rope on wire feeder 58 adopt tensioning devices pre-tensioner to its pretension tensile stress be 200 newton, by wire feeder 5, this is organized to pre-tensioned textile rope 8 again and along conduit axis direction, be evenly arranged in the outer surface of enhancement layer 2, form stretch-resisting layer 3(and see Fig. 4), obtain after stretch-resisting layer 3, adopt interlayer heating welding machine to heat enhancement layer 2 and the stretch-resisting layer 3 being wrapped in outside enhancement layer 2, until bond together after the two melting.Then the high density polyethylene (HDPE) that by material rate is polythene PE 80 or PE100 is put into outer tube extruder and it is heated (temperature is 180～230 ℃) and shears compression and process, obtain viscous state material, extruder is extruded viscous state material to be coated on outside stretch-resisting layer 3, form protective layer 4, cooling and shaping, after protective layer 4 moulding, adopt the antagonism of interlayer heating welding machine to draw layer 3 and the protective layer 4 being coated on outside stretch-resisting layer 3 to heat, until bond together after the two melting, obtain RTP pipe, finally above-mentioned RTP pipe being enclosed to receipts (coiling online) produces to realize the on-line continuous of long distance line.
Wherein, the manufacturing equipment of tension RTP pipe comprises inner tube extruder successively according to processing sequence, spiral winding machine, tensioning device, wire feeder 5 and outer tube extruder.The material of stretch-resisting layer textile rope 8 is aramid fibre.Cross-head structure as shown in Figure 4, the annulus 9 in one group of band winding displacement hole is evenly set on the inwall of outer tube cross-head mouth mould 6, textile rope 8 can be evenly distributed on enhancement layer 2 outer surfaces through winding displacement hole, on head, be also provided with the PE mother tube 7 that may extend to pipe outer surface, during wiring, first the tubing only with inner tube 1 and enhancement layer 2 is inserted in machine head port mould 7, again one end of textile rope 8 is fixed on wire feeder 5, the other end is connected with tensioning device through the machine head port mould 6 of outer tube extruder, be that the winding displacement hole that the other end passes in machine head port mould 6 is evenly arranged in enhancement layer 2 outer surfaces, then adopt tensioning device to carry out pre-tensioner to textile rope 8, textile rope after pre-tensioner 8 is close to enhancement layer 2 outer surfaces of tubing, form stretch-resisting layer 3, meanwhile, high density polyethylene (HDPE) raw material is put into outer tube extruder through hopper, raw material is transported to by hopper at it in process of machine head port mould and heats through barrel, screw rod shearing compression is processed and is obtained viscous state material, final viscous state material is delivered to mouthful mould 6 through PE mother tube 7, tube surfaces extrusion modling in mouth mould 6, form protective layer 4.Therefore,, in tubing manufacture process, the extrusion modling of the machine shaping of stretch-resisting layer 3 and protective layer 4 is carried out simultaneously, has accelerated making flow process.
Embodiment two
The present embodiment is with embodiment one difference: enhancement layer 2 consists of two take-up straps that are wrapped in inner tube 1 outer wall from contrary rotation direction with predetermined winding angle, and wherein winding angle is 50 °; The textile rope 8 that forms stretch-resisting layer 3 is pre-tensioner by tensioning device; the pre-tensioner stress of textile rope 8 is 180 newton; textile rope after pre-tensioner 8 is evenly arranged in to enhancement layer 2 outer surfaces by wire feeder 5 along conduit axis direction; and pre-tensioner textile rope 8 be circumferentially spaced apart 6mm; so that the protective layer 4 of RTP pipe can be bonding with enhancement layer 2, and stretch-resisting layer 3 can bear axial pressure preferably.
In the tension RTP of the present embodiment pipe manufacturing method, the winding angle according to 50 ° is wrapped in inner tube 1 outer wall from contrary rotation direction by two high strength take-up straps to adopt spiral winding machine, forms enhancement layer 2; By one group of textile rope 8 adopt tensioning devices pre-tensioner to its pretension tensile stress be 180 newton, then by wire feeder 5, this is organized to pre-tensioned textile rope 8 and along conduit axis direction, is evenly arranged in the outer surface of enhancement layer 2, form stretch-resisting layer 3, obtain stretch-resisting layer 3.
Embodiment three
The present embodiment is with embodiment one difference: enhancement layer 2 consists of two take-up straps that are wrapped in inner tube 1 outer wall from contrary rotation direction with predetermined winding angle, and wherein winding angle is 60 °; The textile rope 8 that forms stretch-resisting layer 3 is pre-tensioner by tensioning device; the pre-tensioner stress of textile rope 8 is 220 newton; textile rope after pre-tensioner 8 is evenly arranged in to enhancement layer 2 outer surfaces by wire feeder 5 along conduit axis direction; and pre-tensioner textile rope 8 be circumferentially spaced apart 2mm; so that the protective layer 4 of RTP pipe can be bonding with enhancement layer 2, and stretch-resisting layer 3 can bear axial pressure preferably.
In the tension RTP of the present embodiment pipe manufacturing method, the winding angle according to 60 ° is wrapped in inner tube 1 outer wall from contrary rotation direction by two high strength take-up straps to adopt spiral winding machine, forms enhancement layer 2; By one group of textile rope 8 adopt tensioning devices pre-tensioner to its pretension tensile stress be 220 newton, then by wire feeder 5, this is organized to pre-tensioned textile rope 8 and along conduit axis direction, is evenly arranged in the outer surface of enhancement layer 2, form stretch-resisting layer 3, obtain stretch-resisting layer 3.
Claims (6)
1. a tension RTP manages; comprise inner tube and be wound around enhancement layer on inner pipe; described enhancement layer outer wrapping protective layer; it is characterized in that: described enhancement layer consists of two take-up straps that are wrapped in outer wall of inner tube from contrary rotation direction with predetermined winding angle; between described enhancement layer and protective layer, be provided with stretch-resisting layer, described stretch-resisting layer is comprised of one group of circumferential uniform pre-tensioner axial textile rope.
2. tension RTP pipe according to claim 1, is characterized in that: described winding angle is 50～60 °.
3. tension RTP pipe according to claim 1 and 2, is characterized in that: the pre-tensioner stress of described textile rope is 180～220 newton.
4. tension RTP pipe according to claim 3, is characterized in that: the circumferential interval of described pre-tensioner textile rope is more than or equal to 2mm.
5. tension RTP pipe according to claim 4, is characterized in that: described take-up strap is the compound strip that aramid fibre and high density polyethylene (HDPE) form.
6. tension RTP according to claim 5 manages; it is characterized in that: described enhancement layer is bonded on the outer wall of inner tube of extrusion molding shaping by hot melting way; described stretch-resisting layer is bonded in enhancement layer appearance by hot melting way, and described enhancement layer is extruded coated high density polyethylene (HDPE) outward again and formed protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320697956.2U CN203571244U (en) | 2013-11-06 | 2013-11-06 | Tensile RTP pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320697956.2U CN203571244U (en) | 2013-11-06 | 2013-11-06 | Tensile RTP pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203571244U true CN203571244U (en) | 2014-04-30 |
Family
ID=50538975
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320697956.2U Expired - Lifetime CN203571244U (en) | 2013-11-06 | 2013-11-06 | Tensile RTP pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN203571244U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574183A (en) * | 2013-11-06 | 2014-02-12 | 南京晨光欧佩亚复合管工程有限公司 | Tensile RTP and manufacturing method thereof |
| CN110454625A (en) * | 2019-08-30 | 2019-11-15 | 五行科技股份有限公司 | A kind of heavy caliber flexible composite pipe |
-
2013
- 2013-11-06 CN CN201320697956.2U patent/CN203571244U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574183A (en) * | 2013-11-06 | 2014-02-12 | 南京晨光欧佩亚复合管工程有限公司 | Tensile RTP and manufacturing method thereof |
| CN110454625A (en) * | 2019-08-30 | 2019-11-15 | 五行科技股份有限公司 | A kind of heavy caliber flexible composite pipe |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |