Composite pipeline material

Abstract

The utility model belongs to the technical field of pipeline materials, and particularly relates to a composite pipeline material. The utility model provides a composite pipeline material. The composite pipeline material comprises an inner surface layer, an inner fiber cloth reinforcing layer, an inner fiber winding layer, a fiber reinforcing structure layer, an outer fiber cloth reinforcing layer, an outer fiber winding layer and an outer protection layer which are sequentially stacked from inside to outside. The inner surface layer is made of epoxy resin; fibers in the inner fiber cloth reinforcing layer, the inner fiber winding layer, the fiber reinforcing structure layer, the outer fiber cloth reinforcing layer and the outer fiber winding layer are basalt fibers; and the outer protection layer is made of epoxy resin. According to the utility model, the epoxy resin and the basalt fiber have good electrical insulation performance and shielding performance, so that the pipeline material has a good stray current resisting effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline material technical field, specifically relates to a kind of composite pipeline material. BACKGROUND

[0002] In recent years, with the rapid development of economy, the construction of power industry, especially high-voltage, ultra-high voltage AC transmission line and high-speed rail, urban subway, light rail and oil and gas pipeline form a "public corridor" with traditional metal buried pipeline. In the narrow area of "public corridor", transmission line, electrified railway and metal buried pipeline appear crossing, parallel and other phenomena. High-speed rail and transmission line produce AC stray current interference on metal buried pipeline by conduction and induction. Subway and light rail use electric traction, and basically use direct current. It is a system that traction substation supplies power to electric vehicles through traction network along the line. The main power supply is overhead positive catenary, and the running track is used as negative return conductor. In operation, a lot of current does not return to traction substation along return track or does not return at all, but flows to low potential place of earth, forming stray current. Stray current corrosion has the characteristics of direct electrolytic metal, so its corrosion rate is 10n times of the uniform corrosion rate of pipeline in natural state, and even causes corrosion perforation and other hidden troubles, reduces the intrinsic safety and carrying capacity of pipeline, causes pipeline leakage and failure accidents, and threatens property loss and personal safety. The corrosion problem of oil and gas pipeline caused by stray current frequently occurs, which has become a major risk to the safe operation of metal buried pipeline.

[0003] In the protection of buried pipeline, cathodic protection is a technology most closely combined with coating protection and can significantly inhibit corrosion at damaged places of pipeline anticorrosive coating. However, when buried pipeline is disturbed by stray current, traditional anticorrosive measures cannot effectively inhibit corrosion. At present, direct grounding, negative potential grounding and solid-state decoupler grounding and other drainage measures are usually used for stray current. But the efficiency of drainage is low, and for pipeline dense areas, the limited drainage range leads to poor effect. Therefore, developing a new type of composite material pipeline resistant to stray current and electrochemical corrosion to replace metal buried pipeline is an effective way and method to solve the problem. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a kind of composite pipeline material, the composite pipeline material provided by the utility model has good electrical insulation, and can reduce pipeline corrosion caused by stray current when used as buried pipeline.

[0005] In order to solve the above technical problems, the utility model provides a kind of composite pipe material, from inside to outside include the inner surface layer 1 of sequentially laminated, inner fiber cloth reinforcing layer 2, inner fiber winding layer 3, fiber reinforced structure layer 4, outer fiber cloth reinforcing layer 5, outer fiber winding layer 6 and outer protective layer 7;

[0006] The inner surface layer 1 is composed of epoxy resin;

[0007] The fiber in the inner fiber cloth reinforcing layer 2, the inner fiber winding layer 3, the fiber reinforced structure layer 4, the outer fiber cloth reinforcing layer 5 and the outer fiber winding layer 6 is basalt fiber respectively;

[0008] The outer protective layer 7 is composed of epoxy resin.

[0009] Preferably, the thickness of the inner surface layer 1 is 1-2mm;

[0010] The thickness of the inner fiber cloth reinforcing layer 2 is 0.08-0.12mm;

[0011] The thickness of the inner fiber winding layer 3 is 0.1-1mm;

[0012] The thickness of the fiber reinforced structure layer 4 is 1.6-45.6mm;

[0013] The thickness of the outer fiber cloth reinforcing layer 5 is 0.08-0.12mm;

[0014] The thickness of the outer fiber winding layer 6 is 0.1-1mm;

[0015] The thickness of the outer protective layer 7 is 1-2mm.

[0016] Preferably, the inner fiber winding layer 3 and the outer fiber winding layer 6 are respectively composed of basalt fiber with pre-impregnated epoxy resin.

[0017] Preferably, the mass ratio of epoxy resin to basalt fiber in the basalt fiber with pre-impregnated epoxy resin is 20-40:60-80.

[0018] Preferably, the fiber reinforced structure layer 4 is composed of basalt fiber chopped yarn, inorganic filler and resin.

[0019] Preferably, the inorganic filler includes non-metallic mineral with compressive strength greater than or equal to 40MPa.

[0020] Preferably, the resin includes phenolic resin, vinyl resin, epoxy resin and unsaturated or polyester resin.

[0021] Preferably, the mass ratio of basalt fiber chopped yarn, inorganic filler and resin is 3-5:60-67:30-35.

[0022] Preferably, the diameter of the composite pipe material is 20-10000mm.

[0023] The utility model provides a kind of composite pipe material, from inside to outside including sequentially laminated inner surface layer, inner fiber cloth reinforcing layer, inner fiber winding layer, fiber reinforced structure layer, outer fiber cloth reinforcing layer, outer fiber winding layer and outer protective layer;The inner surface layer is composed of epoxy resin;The fiber in inner fiber cloth reinforcing layer, inner fiber winding layer, fiber reinforced structure layer, outer fiber cloth reinforcing layer and outer fiber winding layer is respectively basalt fiber;The outer protective layer is composed of epoxy resin.In the utility model, epoxy resin, basalt fiber has good electric insulation and shielding performance so that pipe material has good anti-stray current effect;Inner surface layer ensures the smoothness of pipe, sealing property and medium resistance, prevents medium leakage or eddy current;Inner and outer fiber cloth reinforcing layer structure plays the role of enhancing structural stability, also plays the role of promoting pipe body carrying capacity and deformation resistance capacity;Fiber reinforced structure layer mainly plays the role of promoting pipe body rigidity and pressure bearing performance;Outer protective layer mainly plays the role of promoting pipe body anti-stray current and wear resistance.The whole pipe body structure is tightly bonded between layers, with good mechanical properties and anti-stray current capacity. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is cross section structure schematic view of composite pipe material;

[0025] Figure 2 It is longitudinal section structure schematic view of composite pipe material;

[0026] Wherein 1 is inner surface layer, 2 is inner fiber cloth reinforcing layer, 3 is inner fiber winding layer, 4 is fiber reinforced structure layer, 5 is outer fiber cloth reinforcing layer, 6 is outer fiber winding layer, 7 is outer protective layer. DETAILED DESCRIPTION

[0027] The utility model provides a kind of composite pipe material, from inside to outside including sequentially laminated inner surface layer 1, inner fiber cloth reinforcing layer 2, inner fiber winding layer 3, fiber reinforced structure layer 4, outer fiber cloth reinforcing layer 5, outer fiber winding layer 6 and outer protective layer 7.

[0028] As a specific embodiment of the utility model, the inner surface layer 1 is composed of epoxy resin;The thickness of the inner surface layer 1 can be 1-2mm, specifically 1mm, 1.5mm or 2mm.

[0029] As a specific embodiment of the utility model, the thickness of the inner fiber cloth reinforcing layer 2 can be 0.08-0.12mm, specifically 0.1mm;The inner fiber cloth reinforcing layer 2 is composed of basalt fiber cloth woven by basalt fiber yarn.

[0030] As a specific embodiment of the present application, the thickness of the inner fiber winding layer 3 can be 0.1-1mm, and can be specifically 0.2mm, 0.3mm, 0.5mm, 0.8mm or 1mm; the inner fiber winding layer 3 can be composed of basalt fibers pre-impregnated with epoxy resin, and the basalt fibers can be specifically basalt continuous fibers. As a specific embodiment of the present application, the mass ratio of epoxy resin to basalt fibers in the basalt fibers pre-impregnated with epoxy resin can be 20-40:60-80, and can also be 30-35:70-75, and can be specifically 30:70, 25:75, 20:80.

[0031] As a specific embodiment of the present application, the thickness of the fiber reinforced structural layer 4 can be 1.6-45.6mm, and can also be 2-40mm, and further can be 5-30mm; the fiber reinforced structural layer 4 can be composed of basalt fiber chopped yarn, inorganic filler and resin; the inorganic filler can be a non-metallic mineral with a compressive strength greater than or equal to 40MPa, and can be specifically quartz sand or calcium carbonate, and the maximum particle size of the inorganic filler is less than or equal to one-third of the thickness of the fiber reinforced structural layer 4; the resin can include phenolic resin, vinyl resin, epoxy resin or unsaturated polyester resin; the mass ratio of the basalt fiber chopped yarn, inorganic filler and resin can be 3-5:60-67:30-35, and can also be 4:62-65:32-33, and can be specifically 4:63:33, 4:64:32 or 3:65:33.

[0032] As a specific embodiment of the present application, the thickness of the outer fiber cloth reinforced layer 5 can be 0.08-0.12mm, and can be specifically 0.08mm, 0.1mm or 0.12mm; the outer fiber cloth reinforced layer 5 can be composed of basalt fiber cloth woven, coated and edge-fixed from basalt fiber yarn. The present application has no special requirements for the weaving, coating and edge-fixing, and the conventional manner in the art can be used. As a specific embodiment of the present application, the thickness and composition of the outer fiber cloth reinforced layer 5 can be consistent with those of the inner fiber cloth reinforced layer 2.

[0033] As a specific embodiment of the utility model, the thickness of the outer fiber winding layer 6 can be 0.1-1mm, and can be specifically 0.1mm, 0.2mm, 0.3mm or 0.5mm;The outer fiber winding layer 6 can be composed of basalt fiber of pre-impregnated epoxy resin;The basalt fiber can be basalt continuous fiber;The mass ratio of epoxy resin and basalt fiber in the basalt fiber of pre-impregnated epoxy resin can be 20-40:60-80, and can also be 30-35:70-75, and can be specifically 30:70, 25:75, 20:80. As a specific embodiment of the utility model, the thickness and composition of the outer fiber winding layer 6 can be consistent with the inner fiber winding layer 3.

[0034] As a specific embodiment of the utility model, the outer protective layer 7 is composed of epoxy resin;The thickness of the outer protective layer 7 can be 1-2mm, and can be specifically 1mm, 1.5mm or 2mm.

[0035] As a specific embodiment of the utility model, the diameter of the composite pipe material can be 20-10000mm, and can also be 50-800mm, and can be specifically 22.6mm, 27.66mm or 35.16mm.

[0036] Figure 1 It is a cross-sectional structure diagram of composite pipe material, Figure 2 It is a longitudinal cross-sectional structure diagram of composite pipe material, wherein 1 is an inner surface layer, 2 is an inner fiber cloth reinforced layer, 3 is an inner fiber winding layer, 4 is a fiber reinforced structure layer, 5 is an outer fiber cloth reinforced layer, 6 is an outer fiber winding layer, and 7 is an outer protective layer.

[0037] The utility model also provides a preparation method of the composite pipe material described in the above technical scheme, comprising the following steps:

[0038] Utilize each layer raw material forming, obtain composite pipe blank body;

[0039] The composite pipe blank body is solidified, and the composite pipe material is obtained.

[0040] The utility model utilizes each layer raw material forming, obtains composite pipe blank body. As a specific embodiment of the utility model, the forming mode can include winding forming. In the utility model, the composite pipe prepared by adopting winding forming process has an inner diameter of ≥1m and has greater ring rigidity (≥7000N / m 2 ), ring tensile strength ≥250MPa and barcol hardness ≥35.

[0041] As a specific embodiment of the utility model, the winding forming can include the following steps:

[0042] Coating epoxy resin on the surface of the rotatable inner core mold to form an inner surface layer 1;

[0043] Wrapping basalt fiber cloth on the surface of the inner surface layer 1 to form an inner fiber cloth reinforced layer 2;

[0044] Winding basalt fiber impregnated with epoxy resin on the surface of the inner fiber cloth reinforced layer 2 to form an inner fiber winding layer 3;

[0045] Spraying a premixed body of basalt fiber chopped yarn, inorganic filler and resin on the surface of the inner fiber winding layer 3 to form a fiber reinforced structure layer 4;

[0046] Wrapping basalt fiber cloth on the surface of the fiber reinforced structure layer 4 to form an outer fiber cloth reinforced layer 5;

[0047] Winding basalt fiber impregnated with epoxy resin on the surface of the outer fiber cloth reinforced layer 5 to form an outer fiber winding layer 6;

[0048] Coating epoxy resin on the surface of the outer fiber winding layer 6 to form an outer protective layer 7 to obtain a composite pipe blank.

[0049] As a specific embodiment of the present application, the winding mode of the basalt fiber impregnated with epoxy resin in the winding forming process can be cross-type reciprocating winding. This winding mode can maximize the mechanical strength (hoop and axial) of the pipeline, the three-dimensional reinforced pipe wall structure improves the rigidity and bending resistance of the pipeline, and the pipeline is not easy to break due to soil friction. The present application does not have special limitations on other process conditions in the winding forming process, and conventional methods in the art can be used.

[0050] After the composite pipe blank obtained by the winding forming is cured, the product after curing can be demolded (the inner core mold is removed) to obtain a composite pipeline material.

[0051] After obtaining the composite pipe blank, the present application cures the composite pipe blank to obtain the composite pipeline material. As a specific embodiment of the present application, the curing temperature can be 80-100 DEG C, and can also be 85-95 DEG C, and can be specifically 80 DEG C, 85 DEG C, 90 DEG C, 95 DEG C or 100 DEG C. The curing time can be 20-30h, and can be specifically 20h, 22h, 24h, 26h, 28h or 30h.

[0052] The present application also provides the application of the composite pipeline material of the above technical solution or the composite pipeline material prepared by the preparation method of the above technical solution as a buried pipeline.

[0053] In order to further illustrate the utility model, the technical scheme provided by the utility model is described in detail below in conjunction with examples, but they cannot be understood as limiting the protection scope of the utility model.

[0054] Example 1

[0055] A composite pipe material with a thickness of 22.6mm is prepared by a winding forming process:

[0056] An inner surface layer 1 with a thickness of 1mm is formed by coating epoxy resin on the surface of the rotatable inner core mold;

[0057] An inner fiber cloth reinforced layer 2 with a thickness of 0.1mm is formed by wrapping basalt fiber cloth on the surface of the inner surface layer 1;

[0058] An inner fiber winding layer 3 with a thickness of 0.2mm is formed by crosswise reciprocatingly winding basalt continuous fibers impregnated with epoxy resin (the mass ratio of epoxy resin to basalt continuous fibers is 30:70) on the surface of the inner fiber cloth reinforced layer 2;

[0059] A fiber reinforced structural layer 4 with a thickness of 20mm is formed by sprinkling basalt fiber chopped yarn, quartz sand with a maximum particle size of 5mm and a premixed body of epoxy resin (the mass ratio of basalt fiber chopped yarn, inorganic filler and epoxy resin is 4:63:33) on the surface of the inner fiber winding layer 3;

[0060] An outer fiber cloth reinforced layer 5 with a thickness of 0.1mm is formed by wrapping basalt fiber cloth (formed by weaving, coating and edge fixing basalt fiber yarn) on the surface of the fiber reinforced structural layer 4;

[0061] An outer fiber winding layer 6 with a thickness of 0.2mm is formed by crosswise reciprocatingly winding basalt fibers impregnated with epoxy resin (the mass ratio of epoxy resin to basalt continuous fibers is 30:70) on the surface of the outer fiber cloth reinforced layer 5;

[0062] An outer protective layer 7 with a thickness of 1mm is formed by coating epoxy resin on the surface of the outer fiber winding layer 6, and a composite pipe blank is obtained;

[0063] After the composite pipe blank is cured at 100℃ for 24h, the inner core mold is removed, and a composite pipe material with a thickness of 22.6mm is obtained.

[0064] Example 2

[0065] A composite pipe material with a thickness of 27.66mm is prepared by a winding forming process:

[0066] An inner surface layer 1 with a thickness of 1.5mm is formed by coating epoxy resin on the surface of the rotatable inner core mold;

[0067] wrapping basalt fiber cloth on the surface of the inner fiber cloth reinforced layer 2, forming an inner fiber cloth reinforced layer 2 with a thickness of 0.12 mm;

[0068] crossing and reciprocally winding pre-impregnated epoxy resin basalt continuous fibers (the mass ratio of epoxy resin and basalt continuous fibers is 25:75) on the surface of the inner fiber cloth reinforced layer 2, forming an inner fiber winding layer 3 with a thickness of 0.3 mm;

[0069] sprinkling basalt fiber chopped yarn, quartz sand with a maximum particle size of 6 mm and a pre-mixed body of epoxy resin (the mass ratio of basalt fiber chopped yarn, inorganic filler and epoxy resin is 3:65:33) on the surface of the inner fiber winding layer 3, forming a fiber reinforced structural layer 4 with a thickness of 24 mm;

[0070] wrapping basalt fiber cloth (basalt fiber cloth formed by weaving, coating and fixing edges of basalt fiber yarn) on the surface of the fiber reinforced structural layer 4, forming an outer fiber cloth reinforced layer 5 with a thickness of 0.12 mm;

[0071] crossing and reciprocally winding pre-impregnated epoxy resin basalt fibers (the mass ratio of epoxy resin and basalt continuous fibers is 25:75) on the surface of the outer fiber cloth reinforced layer 5, forming an outer fiber winding layer 6 with a thickness of 0.12 mm;

[0072] coating epoxy resin on the surface of the outer fiber winding layer 6, forming an outer protective layer 7 with a thickness of 1.5 mm, to obtain a composite pipe blank;

[0073] After curing the composite pipe blank at 100°C for 24h, the inner core mold is removed, and a composite pipe material with a thickness of 27.66 mm is obtained.

[0074] Example 3

[0075] A composite pipe material with a thickness of 35.16 mm is prepared by a winding forming process:

[0076] coating epoxy resin on the surface of the rotatable inner core mold, forming an inner surface layer 1 with a thickness of 2.0 mm;

[0077] wrapping basalt fiber cloth on the surface of the inner surface layer 1, forming an inner fiber cloth reinforced layer 2 with a thickness of 0.08 mm;

[0078] crossing and reciprocally winding pre-impregnated epoxy resin basalt continuous fibers (the mass ratio of epoxy resin and basalt continuous fibers is 20:80) on the surface of the inner fiber cloth reinforced layer 2, forming an inner fiber winding layer 3 with a thickness of 0.5 mm;

[0079] The basalt fiber chopped yarn, quartz sand with a maximum particle size of 7 mm, and a premixed body of epoxy resin (mass ratio of basalt fiber chopped yarn, inorganic filler, and epoxy resin is 4:64:32) are spread on the surface of the inner fiber winding layer 3 to form a fiber-reinforced structural layer 4 with a thickness of 30 mm;

[0080] The basalt fiber cloth (formed by weaving, coating, and fixing edges of basalt fiber yarn) is wrapped on the surface of the fiber-reinforced structural layer 4 to form an outer fiber cloth-reinforced layer 5 with a thickness of 0.08 mm;

[0081] The basalt fiber impregnated with epoxy resin (mass ratio of epoxy resin and basalt continuous fiber is 20:80) is crosswise and reciprocally wound on the surface of the outer fiber cloth-reinforced layer 5 to form an outer fiber winding layer 6 with a thickness of 0.5 mm;

[0082] The epoxy resin is coated on the surface of the outer fiber winding layer 6 to form an outer protective layer 7 with a thickness of 2.0 mm, thereby obtaining a composite pipe blank;

[0083] After the composite pipe blank is cured at 100°C for 24 h, the inner core mold is removed, and a composite pipe material with a thickness of 35.16 mm is obtained.

[0084] Comparative Example 1

[0085] A carbon steel pipe is used as a comparative example.

[0086] The pipe performance of Examples 1-2 and Comparative Example 1 is tested according to the following method, and the results are shown in Table 1:

[0087] (1) Barcol hardness

[0088] Reference is made to “Test Method for Barcol Hardness of Reinforced Plastics” (GB T 3854-2017).

[0089] Sample preparation: The thickness is 24 mm, and the length and width should meet the requirements that the distance from any pressure point to the edge of the sample and the distance between pressure points are not less than 3 mm, and the surface of the sample should be smooth and flat without defects and mechanical damage.

[0090] Test steps: The sample is placed on a hard and stable support surface cement platform for testing, and the product can be directly tested on the appropriate part of its surface. The curved sample should be supported stably, the pressure head sleeve is vertically placed on the surface of the sample, the support foot is placed on the same surface or other solid materials with the same height, and the pressure head and the support foot are kept in the same plane. Hold the hardness meter shell with your hand, quickly and uniformly apply pressure downward until the reading on the dial reaches the maximum value, and record this maximum reading, which is the Barcol hardness value. When the pressure head and the measured surface are in contact, sliding and scratching should be avoided, and the hardness is tested at least at 10 different positions of the sample.

[0091] (2) Initial hoop stiffness

[0092] Refer to "Fiber Reinforced Thermosetting Plastic Pipe Parallel Plate External Load Performance Test Method" (GBT5352-2005).

[0093] Sample preparation: The length of the sample made by cutting the end of the sample vertically should be 300mm, and the cutting should be smooth. Each group of samples is 3.

[0094] Test steps: Place in a temperature (23±2) ℃ environment for 4h, and test in the same environment. The loading plate surface should be flat and smooth. The thickness of the plate should not be less than 6mm to ensure sufficient stiffness. The length of the plate should not be less than the length of the sample, and the width should not be less than the contact width of the loading plate plus 150mm when the sample reaches the maximum radial deformation. Place the sample in the center of the loading plate. Install the deformation measuring instrument in the appropriate position. Apply the initial load to make the upper loading plate contact the sample. Check and adjust the deformation measurement system to ensure that the entire system is in normal working condition, which is the starting point for measuring deformation. Load the sample at the loading speed specified in 5.5. Continuous or interval measurement can be taken when measuring the load-deformation curve. The interval deformation increment should not be greater than 5% of the average inner diameter of the sample. Observe the first significant event that occurs and record the type, location, and corresponding load and deformation in a timely manner.

[0095] (3) Hoop tensile strength

[0096] Refer to "Mechanical Properties Test Method for Fiber Winding Reinforced Plastic Ring Sample" (GB / T1458-2023).

[0097] Sample preparation: The fiber winding reinforced composite pipe sample is directly cut from the fiber winding reinforced composite pipe, then machined to ensure that the reduced face radius r is not less than 9mm, the minimum width of the reduced face is not less than 14mm, and the sample width L is not less than 23mm. The two reduced faces are located at 180° apart, and the cross section is located at the center of the sample width. Each group of samples is 5.

[0098] Test steps: The fiber winding reinforced composite pipe sample uses type II clamp, the width of the tension disc should be greater than the width of the sample, and the diameter should be similar to the inner diameter of the sample. The loading speed of the fiber winding reinforced composite pipe sample is 2.5mm / min to 12.5mm / min. The reduced face of the fiber winding reinforced composite pipe sample is aligned with the gap of the tension disc, and the contact surface of the sample and the clamp should be lubricated. Uniformly and continuously apply load to the sample until failure, and record the failure load.

[0099] (4) Corrosion rate

[0100] Refer to "Evaluation Method for Residual Strength of Oil and Gas Pipelines with Defects" (Y / T 6477-2017).

[0101] The test section is buried with one group of composite pipes and one group of petroleum carbon steel pipes, and the point thickness measurement method (PTR) is adopted.

[0102] Test steps: the wall thickness measurement instrument is used to measure the wall thickness of the detection area, and the minimum measurement wall thickness and the average wall thickness are determined.

[0103] Table 1 Performance of the composite pipe

[0104]

[0105] The corrosion rate refers to the speed of corrosion of a material in a corrosive medium, and can indirectly prove the stray current resistance of the material. The corrosion rate is an index for measuring the corrosion speed of a material under specific environmental conditions. In a stray current environment, the corrosion rate can reflect the degree of influence of the stray current on the material; the smaller the corrosion rate, the smaller the degree of influence of the stray current.

[0106] As can be seen from Table 1, the composite pipe material provided by the utility model has the characteristics of light weight and high strength, and can well reduce the corrosion caused by stray current.

[0107] Although the above embodiment has made a detailed description of the utility model, it is only a part of the embodiment of the utility model, but not all the embodiments, and people can also obtain other embodiments under the premise of no creativity according to the embodiment, and these embodiments all belong to the protection range of the utility model.

Claims

1. A composite pipe material, characterized by It comprises, from inside to outside, an inner surface layer (1), an inner fiber cloth reinforced layer (2), an inner fiber winding layer (3), a fiber reinforced structure layer (4), an outer fiber cloth reinforced layer (5), an outer fiber winding layer (6) and an outer protective layer (7) stacked in sequence. The inner surface layer (1) is made of epoxy resin. The fibers in the inner fiber cloth reinforced layer (2), the inner fiber winding layer (3), the fiber reinforced structure layer (4), the outer fiber cloth reinforced layer (5) and the outer fiber winding layer (6) are basalt fibers respectively. The outer protective layer (7) is made of epoxy resin.

2. The composite pipe material of claim 1, wherein, The thickness of the inner surface layer (1) is 1-2mm. The thickness of the inner fiber cloth reinforced layer (2) is 0.08-0.12mm. The thickness of the inner fiber winding layer (3) is 0.1-1mm. The thickness of the fiber reinforced structure layer (4) is 1.6-45.6mm. The thickness of the outer fiber cloth reinforced layer (5) is 0.08-0.12mm. The thickness of the outer fiber winding layer (6) is 0.1-1mm. The thickness of the outer protective layer (7) is 1-2mm.

3. The composite pipe material of claim 1 or 2, wherein, The inner fiber winding layer (3) and the outer fiber winding layer (6) are respectively made of basalt fibers with pre-impregnated epoxy resin.

4. The composite pipe material of claim 3, wherein, The mass ratio of epoxy resin to basalt fiber in the basalt fibers with pre-impregnated epoxy resin is 20-40:60-80.

5. The composite pipe material of claim 1 or 2, wherein The fiber reinforced structure layer (4) is made of basalt fiber chopped yarn, inorganic filler and resin.

6. The composite pipe material of claim 5, wherein, The inorganic filler includes non-metallic mineral substances with a compressive strength greater than or equal to 40MPa.

7. The composite pipe material of claim 5, wherein The resin includes phenolic resin, vinyl resin, epoxy resin and unsaturated or polyester resin.

8. The composite pipe material of claim 6 or 7, wherein, The mass ratio of basalt fiber chopped yarn, inorganic filler and resin is 3-5:60-67:30-35.

9. The composite pipe material of claim 1, wherein, The diameter of the composite pipe material is 20-10000mm.

Images