CN109323058A - A kind of glass fiber reinforcement bonding flexible pipe suitable for high external pressure environment - Google Patents
A kind of glass fiber reinforcement bonding flexible pipe suitable for high external pressure environment Download PDFInfo
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- CN109323058A CN109323058A CN201811464410.6A CN201811464410A CN109323058A CN 109323058 A CN109323058 A CN 109323058A CN 201811464410 A CN201811464410 A CN 201811464410A CN 109323058 A CN109323058 A CN 109323058A
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- flexible pipe
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- fiber reinforcement
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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Classifications
-
- 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
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/10—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements not embedded in the wall
-
- 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
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/24—Hoses, i.e. flexible pipes wound from strips or bands
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of glass fiber reinforcements suitable for high external pressure environment to bond flexible pipe, and structure successively includes thermoplastic backer layer, metallic framework layer, thermoplastic functional layer, the glass fiber reinforced layer being spirally wound in thermoplastic functional layer and external protection from inside to outside.The present invention is compared to for traditional nonmetallic enhancing flexible pipe three-decker of bonding, increase one layer of metallic framework layer and thermoplastic functional layer, the characteristics of using metal bellows and spiral wire or steel band axial bending ability and higher hoop rigidity, flexible pipe is set to be able to maintain that certain flexibility requirements, while meeting the requirement of flexible pipe minimum bending radius, it can allow to the engineering-environment that its critical external compressive resistance ability with higher is suitable for high external pressure again, while the invention patent has high critical external compressive resistance ability, metallic framework layer can also provide certain anti-internal pressure capability and tensile capacity.
Description
Technical field
The invention patent relates to arrive a kind of bonding flexible pipe, in particular to a kind of applicable Yu Haiyang, buried contour outer press ring
The glass fiber reinforcement in border bonds flexible pipe, can be applied to ocean and Land petroleum engineering, municipal water delivery engineering and building
The fields such as heating and ventilation project.
Background technique
Flexible pipe as a kind of novel pipeline product, is developed in the 1970s earliest.Since it is compared
Have stronger deformability, preferable resistance to corrosion and preferable fatigue durability etc. excellent in steel pipe and concrete reinforced pipe
Therefore point is mainly used in that the dynamic loads such as marine environment are occupied an leading position and there are in the engineering-environment of corrosive medium.
Flexible pipe is usually the composite material tube that is made of thermoplastic resin matrix and reinforcing material, usually by backing layer,
Enhancement layer and external protection three-decker composition.Currently, flexible pipe can divide bonding flexible pipe and non-by material and structure type
Bond flexible pipe.Bonding flexible pipe refers to, is mutually bonded together between each layer of flexible pipe, very close to each other between each layer, such as
Shown in attached drawing 1, including backing layer 1, enhancement layer 2 and external protection 3, non-adherent flexible pipe refer to, the enhancement layer and lining of flexible pipe
It is separated from each other between inner layer and external protection, there is certain gap, also known as ring domain between each layer, as shown in Fig. 2, including
Backing layer 4, ring domain 5, enhancement layer 6, ring domain 7 and external protection 8 can have between each layer of non-adherent flexible pipe certain opposite
It is displaced, gas easy to form is poly- between ring domain, the pressure increase in ring domain is caused, to make pipeline ectonexine that explosion occur.
In addition, flexible pipe can be divided into metal enhancing flexible pipe and nonmetallic enhancing flexible pipe according to the difference of reinforcing material again.Metal
Enhancing flexible pipe refers to that the enhancement layer of flexible pipe is mainly made of metal material, such as the materials such as steel band, steel wire；Nonmetallic increasing
Strong flexible pipe refers to that the enhancement layer of flexible pipe is mainly made of nonmetallic materials, such as glass fibre, aramid fiber and carbon fiber
Deng.The invention patent belongs to nonmetallic enhancing bonding flexible pipe.
Currently, on nonmetallic enhancing bonding flexible tubular structures, mainly by thermoplastic resin backing layer, nonmetallic enhancement layer and
External protection three-decker forms, and is mutually bonded together between each layer.As used in nonmetallic enhancing bonding flexible pipe
Material anti-pressure ability is not strong, causes the hoop rigidity of nonmetallic enhancing bonding flexible pipe lower, and therefore, nonmetallic enhancing bonding is soft
The critical external compressive resistance ability of property pipe is weaker.
Summary of the invention
For current non-adherent flexible pipe there is ring domain to be easy to produce, gas is poly-, and enhancement layer anti-wear ability is insufficient, and
Enhancement layer is easy the disadvantages of being corroded by substance inside and outside pipe；Metal, which bonds flexible pipe, has larger, resistance to corrosion difference etc. of being self-possessed
Disadvantage；Non-metallic bond flexible pipe has the disadvantages of hoop rigidity is insufficient, and critical external compressive resistance ability is poor.The invention patent provides one kind
With preferable deformability, lesser bending radius, good anti-internal pressure capability；Preferable resistance to corrosion, to be not likely to produce gas poly-,
And the glass fiber reinforcement suitable for high external pressure environment with good critical external compressive resistance ability bonds flexible pipe.
The present invention adopts the following technical scheme:
A kind of glass fiber reinforcement bonding flexible pipe suitable for high external pressure environment, structure successively includes thermoplasticity from inside to outside
Backing layer, metallic framework layer, thermoplastic functional layer, the glass fiber reinforced layer being spirally wound in thermoplastic functional layer and outer guarantor
Sheath, wherein thermoplastic backer layer and metallic framework layer, metallic framework layer and thermoplastic functional layer, thermoplastic functional layer and glass
It is mutually bonded together between glass fiber-reinforced layer, glass fiber reinforced layer and external protection, it is viscous to form glass fiber reinforcement
Tie the tube body of flexible pipe.
Preferably, the thermoplastic backer layer uses thermoplastic resin.It is preferred that polyethylene (predominantly high density polyethylene (HDPE)
HDPE and ultra high molecular weight polyethylene UHMWPE), it is polypropylene, polybutene, polyolefin resin, Corvic, poly-
Styrene resin, ABS resin, polymethyl methacrylate, polyflon, polyamide, polycarbonate resin, heat
The thermoplasticity such as plasticity polyester resin (PET, PBT etc.), polyformaldehyde, polyphenylene oxide, polyphenylene sulfide, polyether-ether-ketone, polyimide resin
Resin can select suitable material according to pumped (conveying) medium in the application environment and pipe of flexible pipe.Backing layer acts on
Smooth inner wall is provided for tube fluid, provides heat insulation effect for pumped (conveying) medium in pipe, and provide anticorrosion for metallic framework layer and protect
Shield.
Preferably, the metallic framework layer can be for by blasting treatment or using the stainless steel ripple with hole
Pipe, metal lock catch pipe, bellows and steel pipe are spaced apart from each other the metal tube of arrangement, the high-strength and high-ductility steel wire of spiral winding or spiral
The high-strength and high-ductility steel band of winding, metallic framework layer are closely embedded between thermoplastic backer layer and thermoplastic functional layer, and with
Close adhesion.The effect of metallic framework layer is mainly that pipeline provides higher hoop rigidity, so that it is stronger to have flexible pipe
Critical external compressive resistance ability；Since bellows and helical structure can axially generate bending along pipeline, so it is also ensured that pipeline
The requirement of minimum bending radius and the property coiled.
Preferably, the thermoplastic functional layer uses thermoplastic resin, identical material tree is used with thermoplastic backer layer
Rouge.Thermoplastic functional layer effect causes glass fibre mainly to avoid glass fiber reinforced layer from directly contacting with casing play
Fracture.
Preferably, the close spiral winding of glass fiber reinforced layer is on a functional, 30 ° to 70 ° of winding angle.
Preferably, the formation of the glass fiber reinforced layer can be wound by treated glass fiber bundle,
Or the glass fiber reinforcement band formed by glass fibre with thermoplastic resin is wound.Glass fiber reinforced layer is mainly made
With being to provide higher anti-internal pressure capability and anti-axial tensile ability for pipeline.The main material of glass fiber reinforced layer is glass
The composite material that fiber and thermoplastic resin matrix are combined.
Preferably, the glass fibre is needed by pre-preg, pre-preg includes: one, heat treatment, passes through high temperature
Heater box removes the original sizing material of fiberglass surfacing and moisture；Two, soda acid etching processing mainly utilizes acid-base solution and glass
The oxide of fiber surface reacts, and fiberglass surfacing is made to form hole, improves the bonding between glass fibre and resin matrix
Power；Three, coupling agent treatment carries out table to glass fibre by silane coupling agent, aluminate coupling agent and titanate coupling agent etc.
Surface treatment improves the wellability and cohesive force between glass fibre and matrix resin, and reduces the water imbibition of glass fibre.Soda acid
Etching processing is handled 6 hours for example, glass fibre is placed in 20% 100 degrees Celsius of hydrochloric acid solution.
Preferably, the external protection is used by thermoplastic resin material, external protection tight is in glass fibre
Outside enhancement layer, and tight bond therewith.The main function of external protection is to keep apart glass fiber reinforced layer with external environment
Come, prevents external corrosion medium or external force from destroying glass fiber reinforced layer, while providing certain critical external compressive resistance ability and heat preservation
Effect.
Preferably, the corrugated stainless steel tubing is the bellows of zigzag protrusion or the bellows of ladder-like protrusion.
Preferably, the metal lock catch pipe is that S-shaped latches or C-shaped lock is wound two-by-two by section.
The beneficial effects of the present invention are: 1, compared to traditional nonmetallic enhancing flexible pipe three-decker of bonding for, increase
One layer of metallic framework layer and thermoplastic functional layer, the patent have five-layer structure layer.
2, using the axial bending ability and higher hoop rigidity of metal bellows and spiral wire or steel band the characteristics of, make
Flexible pipe is able to maintain that certain flexibility requirements, while meeting the requirement of flexible pipe minimum bending radius, and can allow to its tool
There is higher critical external compressive resistance ability to be suitable for the engineering-environment of high external pressure.
3, for compared to existing nonmetallic enhancing bonding flexible pipe, the invention patent has the same of high critical external compressive resistance ability
When, metallic framework layer can also provide certain anti-internal pressure capability and tensile capacity.
4, the invention patent uses metallic framework layer, can reduce the winding layer of glass fiber reinforced layer to a certain extent
Therefore number can suitably reduce the cost of pipeline production.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of existing bonding flexible pipe；
Fig. 2 is a kind of structural schematic diagram of existing non-adherent flexible pipe；
Fig. 3 is a kind of structural schematic diagram of the invention；
Fig. 4 is a kind of side view of Fig. 3；
Fig. 5 is a kind of structural schematic diagram of corrugated stainless steel tubing in the present invention；
Fig. 6 is a kind of structural schematic diagram of metal lock catch pipe in the present invention；
Fig. 7 is a kind of structural schematic diagram of metal tube in the present invention；
Fig. 8 is a kind of structural schematic diagram of the high-strength and high-ductility steel wire of spiral winding in the present invention；
Fig. 9 is a kind of structural schematic diagram of the high-strength and high-ductility steel band of spiral winding in the present invention；
In figure: 1, backing layer, 2, enhancement layer, 3, external protection, 4, backing layer, 5, ring domain, 6, enhancement layer 7, ring domain, 8, outer
Protective layer, 9, thermoplastic backer layer, 10, metallic framework layer, 11, thermoplastic functional layer, 12, glass fiber reinforced layer, 13, outer guarantor
Sheath, 14, the bellows of zigzag protrusion, 15, the bellows of ladder-like protrusion, 16, S-shaped lock, 17, C-shaped lock.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, technical scheme of the present invention is further described:
Embodiment: as shown in figures 3 and 4, a kind of glass fiber reinforcement bonding flexible pipe suitable for high external pressure environment, structure
Include successively from inside to outside thermoplastic backer layer, metallic framework layer, thermoplastic functional layer, be spirally wound in thermoplastic functional layer
Glass fiber reinforced layer and external protection, wherein thermoplastic backer layer and metallic framework layer, metallic framework layer and thermoplasticity function
One is mutually bonded between ergosphere, thermoplastic functional layer and glass fiber reinforced layer, glass fiber reinforced layer and external protection
It rises, forms the tube body of glass fiber reinforcement bonding flexible pipe.
The innermost layer of the patent of invention is the backing layer that thermoplastic resin material is constituted, can be according to pumped (conveying) medium in pipe
Difference selects different thermoplastic materials.Such as high density polyethylene (HDPE) (HDPE) and superelevation average molecular weight northylen
(UHMWPE) impact property with higher and good fatigue performance；Polypropylene hardness and heat resistance are better than polyethylene, power
It learns performance and is higher than polyethylene；Polybutene has excellent creep resistance, impact flexibility and environmental stress crack resistance, chemical bond steady
Qualitative, heat resistance and wearability etc.；Polystyrene resin (PS) has the good insulating properties of preferable thermal and insulating performance and resistance to
Radiativity；ABS resin has many advantages, such as good heat-resisting, anti-corrosion, oil resistant, resists cold；Polyamide (PA) has good resistance to
Mill property, chemical reagent resistance, good anti-flammability and stronger hygroscopicity；Polyformaldehyde (POM) hardness and modulus are high, it is strong to impact
Degree and bending strength height, good stability of the dimension, fatigue durability are prominent and corrosion-resistant etc.；Polyphenylene oxide (PPO) has good intensity
With modulus, better heat stability, but be easy work in-process generate residual stress cause to crack；Polyphenylene sulfide (PPS) thermostabilization
Property it is prominent, there is good chemical stability, but it is stretched and bending strength belongs to medium level, and elongation and toughness are inclined
It is low；Polyether-ether-ketone (PEEK) has excellent heat resistance and mechanical property, resistant to chemical etching, water resistance etc..Backing layer is mainly
Pumped (conveying) medium provides slippery inner surface in managing, while certain heat insulation effect is provided for pumped (conveying) medium, and is gold adjacent thereto
Belong to casing play and etch-proof function is provided.Specific implementation step adds backing layer pellet, according to different heat first in filling tube
Plastic material melting temperature selects different control temperature and pressure, and pellet is melted in extruder, and is squeezed out by control
The thermoplastic material of molten condition, is extruded into the backing layer of corresponding size by the radius and thickness of mold.
Metallic framework layer is wrapped in backing layer outer layer, and close connection therewith, and material is mainly stainless steel or titanium alloy
Steel.Metallic framework layer can be for by blasting treatment or using the corrugated stainless steel tubing with hole, metal lock catch pipe, ripple
Pipe and steel pipe are spaced apart from each other the metal tube of arrangement, the high-strength and high-ductility steel wire of spiral winding or the high strength and high ductility steel of spiral winding
Band.As shown in Fig. 5, corrugated stainless steel tubing is the bellows 14 of zigzag protrusion or the bellows 15 of ladder-like protrusion, as attached
Shown in Fig. 6, metal lock catch pipe is that S-shaped lock 16 or C-shaped lock 17 are wound two-by-two by section, and working principle is mainly sharp
With bellows and helical wire or steel band, along the crooked deformability of axis.If using cylindrical steel cylinder as bone
Rack-layer, crooked deformability is smaller, is not able to satisfy the requirement of flexible pipe minimum bending radius.It should be noted that in order to increase
The cohesive force of strong casing play and backing layer and functional layer, can be surface-treated metallic framework layer, such as in casing play
Outer surface blasting treatment, or a certain number of miniature holes are opened in skeleton layer surface.The wavy metal that the invention patent uses
Pipe or spiral wire (steel band) provide under the premise of meeting flexible pipe minimum bending radius and the property coiled requires for pipeline
Stronger critical external compressive resistance ability.
The outside that thermoplastic functional layer is wrapped in metallic framework layer is mutually bonded together therewith, and material is mainly thermoplastic
Property resin, wherein thermoplastic resin preferably selects material identical with backing layer.Functional layer can be by coating machine by functional layer
It is coated on except metallic framework layer.Functional layer can provide certain anti-corrosion protection for metallic framework layer, be situated between to convey in pipe
Matter provides certain heat insulation effect, and provides uniform operating surface for glass fiber reinforced layer, while in turn avoiding glass fibre
It is directly contacted between enhancement layer and metallic framework layer and causes fiberglass reinforced layer rubbing crack.
Glass fiber reinforced layer is closely wrapped in the external of functional layer by spiral winding machine and forms glass fiber reinforcement
Layer.Glass fiber reinforced layer can be by passing through coupling agent (silane coupling agent, aluminate coupling agent and titanate coupling agent etc.)
The continuous long glass fiber silk of reason or the glass fiber reinforcement band (bandwidth being made of long glass fibres silk and thermoplastic material
30mm-170mm, thickness 0.1mm-0.5mm) it is wound.Winding process parameter is as follows: extremely ± 90 ° of winding angle ± 0 ° is (preferably
± 55 °), winding layer number be 2*n layer (total number of plies according to glass fiber reinforced flexible pipe mechanical property determine, n be natural number 1,2,
3).Winding method can choose two kinds of opposite angles, and alternately (such as 55 ° are first layer glass fiber reinforcement for winding
Layer, -55 ° be second layer glass fiber reinforced layer, and so on).Glass fiber high-strength is mainly utilized in glass fiber reinforced layer
The characteristics of degree and high-modulus, thermoplastic resin are compared with severe deformation ability makes glass fiber reinforced flexible pipe have stronger anti-internal pressure
The features such as ability, anti-axial tensile ability and good flexibility.
External protection, which refers to, to be coated on outside glass fiber reinforced layer, and forms single-layer or multi-layer knot by thermoplastic resin
Structure, wherein thermoplastic resin preferentially selects resin identical with functional layer and backing layer.Since most of thermoplastic resin has
The features such as stronger resistance to corrosion, heat resistance, heat insulating ability, fatigue durability, small ductility and water imbibition.Therefore, outer protection
Layer main function is inside pipeline to prevent the erosion of pipeline external corrosive medium or external force from destroying glass fiber reinforced layer
Pumped (conveying) medium provides certain heat insulation effect, and undertake a degree of ambient exterior atmospheric pressure etc..
The production process for being suitable for the glass fiber reinforcement bonding flexible pipe of high external pressure environment is as follows:
1, thermoplastic resin (such as polyethylene (PE)) pellet is packed into pellet cylinder makes thermoplastic resin fat granule by heating melting
Material is melt into liquid, squeezes out thermoplastic resin by specific mold by extruder to obtain backing layer, and pass through dragger
Traction, makes its continuous production.
2, steel band is preheated by heater box or laser infrared heating, is then wound by wrapping machine
On backing layer, and infrared heating is carried out to steel band in winding, bonds it sufficiently with backing layer.
3, functional layer is coated on except casing play by third one functional layer by coating machine, is added in cladding by infrared
Heat makes functional layer sufficiently be bonded together with casing play.
4, by the flexible pipe containing functional layer, structure sheaf and backing layer, heater box heating is first passed through in advance, then at
The glass fiber reinforcement band of reason is preheated, and so that it is wound to functional layer outer surface by wrapping machine, winding angle is preferably just
It minus 55 °, can once wind two layers, successively wind.
5, protective layer is coated on enhancement layer by coating machine, by drawing machine travel, cooling and shaping, then by band
The glass fiber reinforced flexible pipe of matcoveredn rolls up upper drum.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (10)
1. a kind of glass fiber reinforcement suitable for high external pressure environment bonds flexible pipe, characterized in that its structure from inside to outside according to
Secondary includes thermoplastic backer layer, metallic framework layer, thermoplastic functional layer, the glass fibre being spirally wound in thermoplastic functional layer
Enhancement layer and external protection, wherein thermoplastic backer layer and metallic framework layer, metallic framework layer and thermoplastic functional layer, thermoplastic
It is mutually bonded together between sexual function layer and glass fiber reinforced layer, glass fiber reinforced layer and external protection, forms glass
The tube body of glass fiber reinforcement bonding flexible pipe.
2. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 1 bonds flexible pipe, feature
It is that the thermoplastic backer layer uses thermoplastic resin.
3. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 1 bonds flexible pipe, feature
Be, the metallic framework layer can for by blasting treatment or using the corrugated stainless steel tubing with hole, metal lock catch pipe,
Bellows and steel pipe are spaced apart from each other the metal tube of arrangement, the high-strength and high-ductility steel wire of spiral winding or the high-strength and high ductility of spiral winding
Property steel band, metallic framework layer is closely embedded between thermoplastic backer layer and thermoplastic functional layer, and close adhesion therewith.
4. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 1 bonds flexible pipe, feature
It is that the thermoplastic functional layer uses thermoplastic resin, uses identical material resin with thermoplastic backer layer.
5. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 1 bonds flexible pipe, feature
Be, the close spiral winding of glass fiber reinforced layer on a functional, 30 ° to 70 ° of winding angle.
6. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 1 bonds flexible pipe, feature
It is that the formation of the glass fiber reinforced layer can be wound by treated glass fiber bundle, or pass through glass fibers
The glass fiber reinforcement band formed with thermoplastic resin is tieed up to be wound.
7. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 6 bonds flexible pipe, feature
It is that the glass fibre is needed by pre-preg, pre-preg includes: one, heat treatment, removes glass by high-temperature heating case
The original sizing material of fiber surface and moisture；Two, soda acid etching processing, the main oxidation for utilizing acid-base solution and fiberglass surfacing
Object reaction, makes fiberglass surfacing form hole, improves the cohesive force between glass fibre and resin matrix；Three, at coupling agent
Reason carries out surface treatment to glass fibre by silane coupling agent, aluminate coupling agent and titanate coupling agent etc. and improves glass
Wellability and cohesive force between fiber and matrix resin, and reduce the water imbibition of glass fibre.
8. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 1 bonds flexible pipe, feature
It is that the external protection is used by thermoplastic resin material, and external protection tight is outside glass fiber reinforced layer, and therewith
Tight bond.
9. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 3 bonds flexible pipe, feature
It is that the corrugated stainless steel tubing is the bellows of zigzag protrusion or the bellows of ladder-like protrusion.
10. a kind of glass fiber reinforcement suitable for high external pressure environment according to claim 3 bonds flexible pipe, feature
It is that the metal lock catch pipe is that S-shaped latches or C-shaped lock is wound two-by-two by section.
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| CN201811464410.6A CN109323058A (en) | 2018-12-03 | 2018-12-03 | A kind of glass fiber reinforcement bonding flexible pipe suitable for high external pressure environment |
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| CN110214679A (en) * | 2019-06-26 | 2019-09-10 | 朱亚鹏 | A kind of double-level-metal fiber infiltrating irrigation pipe |
| CN113825940A (en) * | 2019-05-16 | 2021-12-21 | 温与科尔斯国际有限公司 | Corrosion resistant coating for metal pipes and metal pipe fittings |
| CN114440015A (en) * | 2020-11-05 | 2022-05-06 | 中国石油化工股份有限公司 | High-temperature-resistant bismaleimide resin fiber reinforced nonmetal oil pipe and manufacturing method thereof |
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