A basalt oil pipeline

Abstract

The present invention provides a basalt oil pipeline comprising an inner layer, a basalt fiber reinforcement layer, and an outer layer. The inner and outer layers are independently made of primary materials selected from materials such as polyurethane and polyimide, exhibiting excellent corrosion resistance. The basalt fiber reinforcement layer utilizes a composite material woven from basalt fibers, exhibiting excellent strength and rigidity. Basalt fiber is a renewable resource, and its use in the manufacture of oil pipelines can reduce reliance on non-renewable resources and promote sustainable development. Compared to traditional steel pipelines, basalt fiber pipelines are lighter, reducing construction and transportation costs. Basalt fiber pipelines can be prefabricated into long sections, reducing on-site installation time and labor costs, facilitating installation.

Description

Technical Field

[0001] The present invention relates to the field of petroleum transportation, and in particular to a basalt oil pipeline. Background Art

[0002] Current oil pipelines also present some practical problems. Their structural integrity is poor, and their ability to withstand pressure fluctuations is limited. This is especially true when the flow rate and pressure of crude oil transported within a short pipe increase. The high-pressure crude oil in the pipe can squeeze through the inner rubber layer and other external reinforcement layers, creating cracks at the ends and causing oil leaks. The oil hoses are subject to significant tensile forces during use, causing each layer to experience a certain level of internal pressure. The internal pressure and tensile strength of the pipes directly affect the hoses' instantaneous elongation and impact resistance. Summary of the Invention

[0003] The present invention provides a basalt oil pipeline comprising an inner layer, a basalt fiber reinforcement layer, and an outer layer. The inner and outer layers are independently made of primary materials selected from materials such as polyurethane and polyimide, exhibiting excellent corrosion resistance. The basalt fiber reinforcement layer utilizes a composite material woven from basalt fibers, exhibiting excellent strength and rigidity. Basalt fiber is a renewable resource, and its use in the manufacture of oil pipelines can reduce reliance on non-renewable resources and promote sustainable development. Compared to traditional steel pipelines, basalt fiber pipelines are lighter, reducing construction and transportation costs. Basalt fiber pipelines can be prefabricated into long sections, reducing on-site installation time and labor costs, facilitating installation.

[0004] A basalt oil pipeline comprises an inner layer, a basalt fiber reinforced layer, and an outer layer, wherein the polymer materials of the inner and outer layers independently include a main material, a modifier, and an additive, and the basalt fiber reinforced layer is a composite material woven from basalt fibers. The pipeline is prepared by the following method:

[0005] 1) Crushing basalt ore into particles, adding 2-4wt% TiO2 to the basalt ore as 100wt% and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0006] 2) placing the basalt fiber in a tubular furnace, introducing a reducing gas, heating for a predetermined time, then introducing a mixture of monosilane and acetylene, heating for a predetermined time, stopping the introduction of monosilane and continuing to introduce acetylene, and continuing to heat for a predetermined time to obtain a basalt fiber coated with silicon carbide and carbon;

[0007] 3) Weaving a plurality of basalt fibers from step 2) to obtain basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation liquid; taking it out and drying it;

[0008] 4) impregnating the fiber cloth obtained in step 3) with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold to form a laminated tube;

[0009] 5) The polymer materials of the inner layer and the outer layer are hot-pressed on the inner and outer sides of the laminated tube through a forming mold to obtain the basalt oil pipeline.

[0010] Furthermore, the mass ratio of the main material, modifier, elastomer and auxiliary agent is 100:5-10:15-20:3-5; the main material is selected from at least one of polyurethane and polyimide; the modifier is selected from at least one of polybutylene terephthalate and polyethylene terephthalate; the elastomer is selected from ethylene propylene diene monomer rubber; the auxiliary agent includes a heat-resistant anti-aging agent and a lubricant; the heat-resistant anti-aging agent is selected from at least one of phosphite antioxidants and hindered phenol antioxidants, and the lubricant is selected from at least one of ethylene bisstearamide and calcium stearate.

[0011] Furthermore, the inner layer and outer layer polymer materials are prepared by the following method: weighing the main ingredients, modifiers, elastomers and additives in proportion; adding the raw materials to a high-speed mixer and mixing for 20-30 minutes to obtain a blended material; putting the blended material into a twin-screw extruder, melt-extruded at a temperature of 200°C to 225°C, and cooling and granulating.

[0012] Furthermore, in step 2), the basalt fiber is placed in a tubular furnace, a hydrogen / nitrogen mixture with a hydrogen content of 3-5% by volume is introduced, and the mixture is heated at 300-350° C. for 0.5-1 hour. A mixture of monosilane and acetylene with a volume ratio of 2:1 is introduced, and the mixture is heated at 350-400° C. for 6-12 hours. The introduction of monosilane is stopped and acetylene gas is continued to be introduced, and the mixture is heated at 350-400° C. for 4-6 hours to obtain a basalt fiber coated with silicon carbide and carbon.

[0013] Furthermore, in step 3), the impregnation liquid comprises: 2-2.5 parts by mass of silane coupling agent KH-550, 1.2-1.5 parts by mass of polyoxyethylene stearate and 100 parts by mass of deionized water.

[0014] Furthermore, in step 4), the hot pressing temperature is 150-160° C. and the pressure is 30-40 MPa.

[0015] Furthermore, in step 5), the hot pressing temperature is 160-180° C. and the pressure is 30-40 MPa.

[0016] Beneficial technical effects of the present invention

[0017] 1) The use of basalt fiber to manufacture oil pipelines has the following advantages: Corrosion resistance: Basalt fiber can resist the erosion of chemicals and seawater, so it is suitable for transporting oil and gas at sea or in other corrosive environments. High strength and stiffness: Basalt fiber is a high-strength, high-rigidity material that can withstand high pressure and heavy loads. Lightweight: Compared with traditional steel pipes, basalt fiber pipes have a lighter weight, reducing construction costs and transportation costs. Easy installation: Basalt fiber pipes can be prefabricated into long sections, reducing the time and labor costs of on-site installation. Sustainable development: Basalt fiber is a renewable resource. Using it to manufacture oil pipelines can reduce dependence on non-renewable resources and promote sustainable development.

[0018] 2) The inventors discovered that coating the surface of basalt fiber with silicon carbide can improve the mechanical properties of basalt fiber. After doping basalt with TiO2 and then reducing it in a reducing atmosphere, elemental particles can be produced on the surface of the basalt. These particles can catalyze the precipitation of monosilane and acetylene around them at high temperatures, thereby improving the coating effect.

[0019] 3) Compared with the surface-coated silicon carbide material, when the outer surface is carbon material, the impregnant can improve the bundling ability of hundreds or even thousands of basalt monofilaments in the basalt coarse fiber, while improving the chemical bonding ability between the basalt fiber and other materials, and improving the mechanical properties of the composite material. DETAILED DESCRIPTION

[0020] The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples within the scope of the present invention.

[0021] Example 1

[0022] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0023] 2) Crushing basalt ore into particles, adding 2wt% TiO2 to the basalt ore as 100wt% and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0024] 3) The basalt fiber was placed in a tubular furnace and introduced into a hydrogen / nitrogen mixture with a hydrogen content of 3% by volume, heated at 300°C for 0.5 h, and then introduced into a mixture of monosilane and acetylene in a volume ratio of 2:1, heated at 350°C for 12 h. The introduction of monosilane was stopped and acetylene was introduced, and heated at 350°C for 4 h to obtain a basalt fiber coated with silicon carbide and carbon.

[0025] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0026] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0027] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0028] Example 2

[0029] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0030] 2) Crushing basalt ore into particles, adding 4wt% TiO2 to the basalt ore as 100wt% and melting the particles to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0031] 3) The basalt fiber was placed in a tubular furnace and introduced into a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, and heated at 300°C for 0.5-1 hour. A mixture of monosilane and acetylene in a volume ratio of 2:1 was introduced and heated at 400°C for 12 hours. The introduction of monosilane was stopped and acetylene was introduced and heated at 400°C for 6 hours to obtain a basalt fiber coated with silicon carbide and carbon.

[0032] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.5 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0033] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0034] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0035] Example 3

[0036] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0037] 2) Crushing basalt ore into particles, adding 3wt% TiO2 based on 100% basalt ore and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0038] 3) The basalt fiber was placed in a tubular furnace and introduced into a hydrogen / nitrogen mixture with a hydrogen content of 4% by volume, heated at 300°C for 1 hour, and then introduced into a mixture of monosilane and acetylene in a volume ratio of 2:1, heated at 350°C for 10 hours. The introduction of monosilane was stopped and acetylene was introduced, and heated at 350°C for 6 hours to obtain a basalt fiber coated with silicon carbide and carbon.

[0039] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0040] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0041] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0042] Comparative Example 1

[0043] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0044] 2) Crushing basalt ore into particles and melting them to form a spinning melt; the spinning melt is drawn to obtain basalt fiber;

[0045] 3) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0046] 4) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0047] 5) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube through a forming mold at a hot-pressing temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0048] Comparative Example 2

[0049] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0050] 2) Crushing basalt ore into particles and melting them to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0051] 3) The basalt fiber was placed in a tube furnace, and a mixture of monosilane and acetylene in a volume ratio of 2:1 was introduced, and heated at 350°C for 10 hours to obtain a basalt fiber coated with silicon carbide and carbon;

[0052] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0053] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0054] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0055] Comparative Example 3

[0056] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0057] 2) Crushing basalt ore into particles, adding 3wt% TiO2 based on 100% basalt ore and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0058] 3) The basalt fiber was placed in a tube furnace, and a mixture of monosilane and acetylene in a volume ratio of 2:1 was introduced, and heated at 350°C for 10 hours to obtain a basalt fiber coated with silicon carbide and carbon;

[0059] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0060] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0061] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0062] Comparative Example 4

[0063] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0064] 2) Crushing basalt ore into particles and melting them to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0065] 3) The basalt fiber was placed in a tubular furnace and introduced into a hydrogen / nitrogen mixture with a hydrogen content of 4% by volume, heated at 300°C for 1 hour, and then introduced into a mixture of monosilane and acetylene with a volume ratio of 2:1 and heated at 350°C for 10 hours to obtain a basalt fiber coated with silicon carbide and carbon;

[0066] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0067] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0068] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0069] Comparative Example 5

[0070] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0071] 2) Crushing basalt ore into particles, adding 3wt% TiO2 based on 100% basalt ore and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0072] 3) The basalt fiber was placed in a tubular furnace and introduced into a hydrogen / nitrogen mixture with a hydrogen content of 4% by volume, heated at 300°C for 1 hour, and then introduced into a mixture of monosilane and acetylene with a volume ratio of 2:1 and heated at 350°C for 10 hours to obtain a basalt fiber coated with silicon carbide and carbon;

[0073] 4) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0074] 5) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube through a forming mold at a hot-pressing temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0075] Comparative Example 6

[0076] 1) Weighing polyurethane, polybutylene terephthalate, ethylene propylene diene monomer rubber, a phosphite antioxidant, and ethylene bisstearamide in a mass ratio of 100:8:20:2:2; adding the raw materials to a high-speed mixer and mixing for 30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a melt temperature of 200° C. and an extrusion temperature of 225° C., cooling and granulating to obtain inner and outer layer materials;

[0077] 2) Crushing basalt ore into particles, adding 3wt% TiO2 based on 100% basalt ore and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber;

[0078] 3) The basalt fiber was placed in a tube furnace and introduced into a hydrogen / nitrogen mixture with a hydrogen content of 4% by volume, heated at 300°C for 1 hour, and then introduced into a mixture of monosilane and acetylene with a volume ratio of 2:1 and heated at 350°C for 10 hours to obtain silicon carbide-coated basalt fiber;

[0079] 4) Weaving a plurality of basalt fibers to obtain a basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation solution comprising: 2.5 parts by weight of a silane coupling agent KH-550, 1.2 parts by weight of polyoxyethylene stearate, and 100 parts by weight of deionized water; and removing the cloth from the mesh cloth and drying it;

[0080] 5) Impregnating the fiber cloth with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold at a temperature of 160°C and a pressure of 30 MPa to form a laminated tube;

[0081] 6) hot-pressing the polymer materials of the inner and outer layers onto the inner and outer sides of the laminated tube using a forming mold at a temperature of 180° C. and a pressure of 30 MPa to obtain the basalt oil pipeline.

[0082] Experimental results

[0083] The tensile strength and notched impact strength of the present embodiment and the comparative example were tested. The tensile strength was tested according to ISO-527 standard, and the notched impact was tested according to ISO180 standard.

[0084] The test results are shown in Table 1 below:

[0085] Table 1

[0086] Tensile strength (MPa) <![CDATA[Izod impact (kJ / m 2 )]]> Example 1 68.2 142.0 Example 2 67.6 140.2 Example 3 67.9 141.5 Comparative Example 1 46.7 102.6 Comparative Example 2 54.6 112.5 Comparative Example 3 53.1 110.2 Comparative Example 4 61.1 129.3 Comparative Example 5 58.4 122.5 Comparative Example 6 62.0 131.5 .

[0087] From the comparison of the data of the embodiment and comparative examples 1-2, it can be seen that the coating of silicon carbide can improve the mechanical properties of the material. From the data of comparative examples 2-3, it can be seen that simply adding TiO2 to change the Ti content of basalt has no positive effect on the mechanical properties, and the mechanical properties are almost unchanged. The basalt after hydrogen reduction can improve the coating effect of silicon carbide. From the data of comparative examples 3-4, it can be seen that the synergistic effect of adding TiO2 and hydrogen reduction can significantly improve the coating effect of silicon carbide. From comparative examples 5-6, it can be seen that compared with externally coated silicon carbide, when the basalt fiber is externally coated with carbon material, the impregnant can improve the bundling ability of hundreds or even thousands of basalt monofilaments in the basalt coarse fiber, while improving the chemical bonding ability between the basalt fiber and other materials, thereby improving the mechanical properties of the composite material.

[0088] Although the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as limiting the present invention.

Claims

1. A basalt oil pipeline comprising an inner layer, a basalt fiber reinforced layer, and an outer layer, wherein the polymer materials of the inner and outer layers independently comprise a main material, a modifier, and an additive, and the basalt fiber reinforced layer is a composite material woven from basalt fibers, characterized in that: The pipeline is prepared by the following method: 1) Crushing basalt ore into particles, adding 2-4wt% TiO2 to the basalt ore as 100wt% and melting to form a spinning melt; drawing the spinning melt to obtain basalt fiber; 2) placing the basalt fiber in a tubular furnace, introducing a reducing gas, and heating for a predetermined time, then introducing a mixture of monosilane and acetylene, and heating for a predetermined time, stopping the introduction of monosilane and continuing to introduce acetylene, and continuing heating for a predetermined time to obtain a basalt fiber coated with silicon carbide and carbon; 3) Weaving a plurality of basalt fibers from step 2) to obtain basalt fiber cloth; immersing the basalt fiber mesh cloth in an impregnation liquid; taking it out and drying it; 4) impregnating the fiber cloth obtained in step 3) with phenolic resin; winding the multiple layers of fiber cloth impregnated with phenolic resin and hot pressing them through a forming mold to form a laminated tube; 5) The polymer materials of the inner layer and the outer layer are hot-pressed on the inner and outer sides of the laminated tube through a forming mold to obtain the basalt oil pipeline.

2. The oil pipeline according to claim 1, characterized in that: The mass ratio of the main material, modifier, elastomer and auxiliary agent is 100:5-10:15-20:3-5; the main material is selected from at least one of polyurethane and polyimide; the modifier is selected from at least one of polybutylene terephthalate and polyethylene terephthalate; the elastomer is selected from ethylene propylene diene monomer rubber; the auxiliary agent includes a heat-resistant anti-aging agent and a lubricant; the heat-resistant anti-aging agent is selected from at least one of phosphite antioxidants and hindered phenol antioxidants, and the lubricant is selected from at least one of ethylene bisstearamide and calcium stearate.

3. The oil pipeline according to claim 2, wherein the inner and outer polymer materials are prepared by the following method: weighing the main ingredients, modifier, elastomer and additives in proportion; adding the raw materials to a high-speed mixer and mixing for 20-30 minutes to obtain a blended material; feeding the blended material into a twin-screw extruder, melt-extruded at a temperature of 200°C to 225°C, and cooling to granulate.

4. The oil pipeline according to claim 1, characterized in that: In step 2), the basalt fiber is placed in a tubular furnace, a hydrogen / nitrogen mixture with a hydrogen content of 3-5% by volume is introduced, and the mixture is heated at 300-350° C. for 0.5-1 hour. A mixture of monosilane and acetylene with a volume ratio of 2:1 is introduced, and the mixture is heated at 350-400° C. for 6-12 hours. The introduction of monosilane is stopped, and acetylene gas is continued to be introduced, and the mixture is heated at 350-400° C. for 4-6 hours to obtain a basalt fiber coated with silicon carbide and carbon.

5. The oil pipeline according to claim 1, wherein: In step 3), the impregnation liquid comprises: 2-2.5 parts by mass of silane coupling agent KH-550, 1.2-1.5 parts by mass of polyoxyethylene stearate and 100 parts by mass of deionized water.

6. The oil pipeline according to claim 1, wherein in step 4), the hot pressing temperature is 150-160°C and the pressure is 30-40 MPa.

7. The oil pipeline according to claim 1, wherein in step 5), the hot pressing temperature is 160-180°C and the pressure is 30-40 MPa.