CN112377684B - Low-temperature pipeline with inner and outer spring framework structures - Google Patents
Low-temperature pipeline with inner and outer spring framework structures Download PDFInfo
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- CN112377684B CN112377684B CN202011383254.8A CN202011383254A CN112377684B CN 112377684 B CN112377684 B CN 112377684B CN 202011383254 A CN202011383254 A CN 202011383254A CN 112377684 B CN112377684 B CN 112377684B
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- 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
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
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- 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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
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- 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
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
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- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a low-temperature pipeline with an inner spring framework structure, which comprises an inner framework layer, a wear-resistant layer, a sealing film layer, a heat-insulating layer, a circumferential reinforcing layer, a longitudinal reinforcing layer and an outer framework layer which are coaxially arranged from inside to outside, wherein the inner framework layer, the wear-resistant layer, the sealing film layer, the heat-insulating layer, the circumferential reinforcing layer, the longitudinal reinforcing layer and the outer framework layer are sequentially wound layer by layer. The layers of the low-temperature pipeline with the inner and outer spring framework structures are of non-bonding structures, the spiral line of the outer framework layer and the spiral line of the inner framework layer are staggered and wound by half a pitch, the spiral line of the inner framework layer is outwards tensioned, the spiral line of the outer framework layer is inwards tensioned, the inner and outer layers interact, extrusion wearing layer, sealing membrane layer, heat preservation, hoop enhancement layer and vertical enhancement layer restrict each layer slip, seal and resistance to compression effect are better, and ultra-low temperature impact resistance is excellent, and be difficult for radial buckling and lateral buckling, but wide application in low temperature pipeline technical field.
Description
Technical Field
The invention relates to the technical field of low-temperature pipelines, in particular to a low-temperature pipeline with an inner spring framework structure and an outer spring framework structure.
Background
In recent years, the LNG industry has been rapidly developed, and FLNG (floating LNG production facility) is a high-technology ship for marine natural gas development. The low-temperature flexible pipeline is core matched equipment of FLNG and is used for externally conveying low-temperature liquefied natural gas. The low temperature flexible pipeline has huge market potential, including expanded applications including land use, water use LNG transfer, refuting and filling, and has a potential market reaching the billion level.
Most of the existing low-temperature pipes are metal corrugated pipes, the low-temperature sealing effect is poor, and some low-temperature pipes have good sealing effect but complex structure and are troublesome to manufacture.
Disclosure of Invention
The invention aims to solve the defects of the technology, and provides a low-temperature pipeline with an inner spring framework structure and an outer spring framework structure, which is simple to manufacture, has good sealing effect and good compression resistance.
The invention provides a low-temperature pipeline with an inner spring framework structure, which comprises an inner framework layer, a wear-resistant layer, a sealing film layer, a heat-insulating layer, a circumferential reinforcing layer, a longitudinal reinforcing layer and an outer framework layer which are coaxially arranged from inside to outside, wherein the wear-resistant layer is coated on the outer circumferential surface of the inner framework layer, the sealing film layer is coated on the outer circumferential surface of the wear-resistant layer, the heat-insulating layer is coated on the outer circumferential surface of the sealing film layer, the circumferential reinforcing layer is coated on the outer circumferential surface of the heat-insulating layer, the longitudinal reinforcing layer is coated on the outer circumferential surface of the circumferential reinforcing layer, and the outer framework layer is coated on the outer circumferential surface of the longitudinal reinforcing layer.
Preferably, the inner framework layer, the wear-resistant layer, the sealing film layer, the heat preservation layer, the annular reinforcing layer, the longitudinal reinforcing layer and the outer framework layer are sequentially wound layer by layer.
Preferably, the inner framework layer and the outer framework layer are both in a spiral structure formed by winding 9 nickel steel materials.
Preferably, the spiral directions and the screw pitches of the inner framework layer and the outer framework layer are the same, and the spiral lines of the inner framework layer and the spiral lines of the outer framework layer are uniformly distributed at intervals.
Preferably, the wear-resistant layer is formed by winding carbon fiber cloth.
Preferably, the sealing film layer is formed by winding a film strip made of ultralow-temperature polymer materials in multiple layers.
Preferably, the heat preservation layer is formed by winding aerogel materials.
Preferably, the circumferential reinforcing layer is formed by winding an even number of layers of carbon fiber cloth according to 75-85 degrees.
Preferably, the longitudinal reinforcing layer is formed by winding an even number of layers of carbon fiber cloth according to 45-55 degrees.
The invention provides a low-temperature pipeline with an inner spring framework structure and an outer spring framework structure, which has the following beneficial effects:
The low-temperature pipeline with the inner spring framework structure comprises an inner framework layer, a wear-resistant layer, a sealing film layer, a heat-insulating layer, a circumferential reinforcing layer, a longitudinal reinforcing layer and an outer framework layer which are coaxially arranged from inside to outside, wherein the inner framework layer, the wear-resistant layer, the sealing film layer, the heat-insulating layer, the circumferential reinforcing layer, the longitudinal reinforcing layer and the outer framework layer are sequentially wound into a cylinder layer by layer, and a non-bonding structure is arranged between each two layers.
The inner framework layer and the outer framework layer are both wound into a spiral structure by adopting 9 nickel steel materials, and the structure can simultaneously meet axial and radial deformation, can bear larger load, does not generate permanent deformation after the load is removed, increases the compressive strength of the pipeline and has excellent ultralow-temperature impact resistance.
The spiral structures, spiral directions and screw pitches of the inner framework layer and the outer framework layer are the same, the spiral lines of the inner framework layer and the spiral lines of the outer framework layer are evenly distributed at intervals, and the angles of the spiral lines are 83 degrees to 89 degrees. The spiral line of the outer framework layer and the spiral line of the inner framework layer are staggered and wound by half a screw pitch, the spiral line of the inner framework layer is outwards tensioned, the spiral line of the outer framework layer is inwards tensioned, the inner and outer interaction is performed, the wear-resisting layer, the sealing film layer, the heat preservation layer, the circumferential reinforcing layer and the longitudinal reinforcing layer are extruded, the relative sliding of each layer is limited, and the sealing and compression-resisting effects of the pipeline are better. Moreover, the inner and outer spiral line structures avoid the phenomena of radial buckling (radial protrusion) and lateral buckling (lateral offset sliding torsion deformation along the cylindrical surface) caused by axial force under special conditions when single-layer spiral line winding is performed, and the inner and outer spiral line winding method effectively limits the occurrence of the radial buckling and lateral buckling failure modes.
The wear-resistant layer is woven by carbon fiber cloth, so that the water content is extremely low, a large amount of icing phenomenon can not occur, and the material performance is not affected.
The arrangement of the annular reinforcing layer and the longitudinal reinforcing layer enables the pipeline to bear annular force and axial force, improves the tensile strength of the whole pipeline, resists torsional deformation better, has wide application range and has wide application prospect.
Drawings
Fig. 1 is a schematic view of an extended partial structure of a cross section of the present invention.
The marks in the figure: 1. the inner framework layer, the wear-resistant layer, the sealing film layer, the heat-insulating layer, the annular reinforcing layer, the longitudinal reinforcing layer and the outer framework layer.
Detailed Description
The invention will be further described with reference to specific examples to aid in understanding the invention. The method used in the invention is a conventional method unless specified otherwise; the raw materials and devices used, unless otherwise specified, are all conventional commercial products.
As shown in fig. 1: the invention provides a low-temperature pipeline with an inner spring framework structure, which comprises an inner framework layer 1, a wear-resistant layer 2, a sealing film layer 3, a heat-insulating layer 4, a circumferential reinforcing layer 5, a longitudinal reinforcing layer 6 and an outer framework layer 7 which are coaxially arranged from inside to outside, wherein the wear-resistant layer 2 is coated on the outer circumferential surface of the inner framework layer 1, the sealing film layer 3 is coated on the outer circumferential surface of the wear-resistant layer 2, the heat-insulating layer 4 is coated on the outer circumferential surface of the sealing film layer 3, the circumferential reinforcing layer 5 is coated on the outer circumferential surface of the heat-insulating layer 4, the longitudinal reinforcing layer 6 is coated on the outer circumferential surface of the circumferential reinforcing layer 5, and the outer framework layer 7 is coated on the outer circumferential surface of the longitudinal reinforcing layer 6.
The inner framework layer 1, the wear-resistant layer 2, the sealing film layer 3, the heat preservation layer 4, the annular reinforcing layer 5, the longitudinal reinforcing layer 6 and the outer framework layer 7 are sequentially wound into a cylinder layer by layer, and a non-bonding structure is arranged between each two layers.
The inner framework layer 1and the outer framework layer 7 are both in a spiral structure formed by winding 9 nickel steel materials. The 9 nickel steel material has small low-temperature shrinkage, small volume change and good low-temperature toughness, and meets the low-temperature operation requirement of the pipeline. The spiral structure forms enable the inner framework layer 1and the outer framework layer 7 to generate elastic deformation in the axial direction and the radial direction, so that the inner framework layer and the outer framework layer can bear a certain load, and after the load is removed, permanent deformation does not occur, the compressive strength of the pipeline is increased, and the ultralow temperature impact resistance is excellent.
The spiral directions and the spiral pitches of the inner framework layer 1 and the outer framework layer 7 are the same, the spiral lines of the inner framework layer 1 and the spiral lines of the outer framework layer 7 are uniformly distributed at intervals, and the angles of the spiral lines are 83 degrees to 89 degrees. When the pipeline is manufactured, the spiral line of the outer framework layer 7 and the spiral line of the inner framework layer 1 are staggered and wound by half a spiral pitch, the spiral line of the inner framework layer 1 is outwards tensioned, the spiral line of the outer framework layer 7 is inwards tensioned, the inner and outer interaction is performed, the abrasion-resistant layer 2, the sealing film layer 3, the heat preservation layer 4, the circumferential reinforcing layer 5 and the longitudinal reinforcing layer 6 are extruded, the relative sliding of each layer is limited, and the sealing and compression-resistant effects of the pipeline are better. Moreover, the inner and outer spiral line structures avoid the phenomena of radial buckling (radial protrusion) and lateral buckling (lateral offset sliding torsion deformation along the cylindrical surface) caused by axial force under special conditions when single-layer spiral line winding is performed, and the inner and outer spiral line winding method effectively limits the occurrence of the radial buckling and lateral buckling failure modes.
The wear-resistant layer 2 is formed by winding carbon fiber cloth. The carbon fiber cloth has extremely low water content, and can not generate a large amount of icing phenomenon at low temperature, thereby influencing the material performance.
The sealing film layer 3 is formed by winding a film strip made of ultralow-temperature polymer materials in a plurality of layers. The ultralow temperature polymer material can be PFA soluble polytetrafluoroethylene, PCTFE polytrifluoroethylene and PTFE (powder) polytetrafluoroethylene, and is wound on the outer layer of the wear-resistant layer 2 in a multi-layer manner, and is bundled into a tube shape by fiber filaments, so that the sealing and plastic effects are good.
The heat preservation layer 4 is formed by winding aerogel materials, and has excellent heat preservation performance.
The annular reinforcing layer 5 is formed by winding an even number of layers of carbon fiber cloth according to 75-85 degrees and mainly bears the annular stress. The circumferential reinforcing layer 5 is wound forward and backward by a rotary winding machine at 75-85 degrees. The forward winding angle is the same as the reverse winding angle, but the spiral direction is opposite, so that the effect of balancing the internal torque and the external torque can be achieved, the torsion deformation is resisted, the tensile strength of the whole pipeline is improved, the circumferential force is born, the partial internal pressure is resisted, and the internal wear-resistant layer 2, the sealing film layer 3 and the heat preservation layer 4 are protected. The number of layers of carbon fiber materials with opposite spiral directions is the same, so that torsion deformation is better resisted.
The longitudinal reinforcing layer 6 is formed by winding an even number of layers of carbon fiber cloth according to 45-55 degrees. The longitudinal reinforcing layer 6 is also wound forward and backward by a rotary winding machine at 45-55 degrees. The winding angle subjects the longitudinal reinforcement layer 6 to axial stress, stretch-resistance.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (1)
1. The low-temperature pipeline with the inner spring framework structure is characterized by comprising an inner framework layer, a wear-resistant layer, a sealing film layer, a heat preservation layer, a circumferential reinforcing layer, a longitudinal reinforcing layer and an outer framework layer which are coaxially arranged from inside to outside, wherein the wear-resistant layer is coated on the outer circumferential surface of the inner framework layer, the sealing film layer is coated on the outer circumferential surface of the wear-resistant layer, the heat preservation layer is coated on the outer circumferential surface of the sealing film layer, the circumferential reinforcing layer is coated on the outer circumferential surface of the heat preservation layer, the longitudinal reinforcing layer is coated on the outer circumferential surface of the circumferential reinforcing layer, and the outer framework layer is coated on the outer circumferential surface of the longitudinal reinforcing layer;
the inner framework layer, the wear-resistant layer, the sealing film layer, the heat preservation layer, the annular reinforcing layer, the longitudinal reinforcing layer and the outer framework layer are sequentially wound layer by layer;
the inner framework layer and the outer framework layer are both in a spiral structure form formed by winding 9 nickel steel materials;
The spiral lines of the inner framework layer and the outer framework layer are uniformly distributed at intervals, the angles of the spiral lines are 83-89 degrees, and when the pipeline is manufactured, the spiral lines of the outer framework layer and the inner framework layer are staggered and wound by half of a spiral pitch;
the wear-resistant layer is formed by winding carbon fiber cloth;
The sealing film layer is formed by winding film strips made of ultralow-temperature polymer materials in multiple layers;
The heat preservation layer is formed by winding aerogel materials;
The annular reinforcing layer is formed by winding an even number of layers of carbon fiber cloth according to 75-85 degrees;
the longitudinal reinforcing layer is formed by winding an even number of layers of carbon fiber cloth according to 45-55 degrees.
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| CN202011383254.8A CN112377684B (en) | 2020-12-01 | 2020-12-01 | Low-temperature pipeline with inner and outer spring framework structures |
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| CN202011383254.8A CN112377684B (en) | 2020-12-01 | 2020-12-01 | Low-temperature pipeline with inner and outer spring framework structures |
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| CN112377684A CN112377684A (en) | 2021-02-19 |
| CN112377684B true CN112377684B (en) | 2024-08-23 |
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| CN117189960A (en) * | 2023-08-25 | 2023-12-08 | 杭州汽轮动力集团股份有限公司 | A flexible tube for gas turbine turbine cooling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN213712152U (en) * | 2020-12-01 | 2021-07-16 | 威海鸿通管材股份有限公司 | Low-temperature pipeline with internal and external spring framework structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2775052B1 (en) * | 1998-02-18 | 2000-03-10 | Coflexip | FLEXIBLE PIPE FOR RISING COLUMN IN A SEA OIL EXPLOITATION |
| CA2699559C (en) * | 2007-09-14 | 2016-01-19 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to pipe |
| CN202118388U (en) * | 2011-05-23 | 2012-01-18 | 文登鸿通管材有限公司 | Non-adhesive type pultrusion composite pipe |
| GB2514785A (en) * | 2013-06-03 | 2014-12-10 | Wellstream Int Ltd | Flexible pipe body layer and method of producing same |
| JP5976600B2 (en) * | 2013-07-18 | 2016-08-23 | 太陽金網株式会社 | Mesh belt with stepped surface |
| CN104033669B (en) * | 2014-06-23 | 2017-01-25 | 山东冠通蓝海石油管材有限公司 | Continuous fiber reinforced non-adhesive compound flexible pipe |
| KR20170101407A (en) * | 2016-02-29 | 2017-09-06 | 최호경 | Hose having function of leak detection and manufacturing method thereof |
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| CN213712152U (en) * | 2020-12-01 | 2021-07-16 | 威海鸿通管材股份有限公司 | Low-temperature pipeline with internal and external spring framework structure |
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