High-performance intelligent reinforced fiber composite material core overhead conductor and preparation method thereof

Abstract

The invention discloses a high-performance intelligent reinforced fiber composite material core overhead conductor and a preparation method, the overhead conductor comprises an intelligent reinforced fiber composite material core, and the periphery of the intelligent reinforced fiber composite material core is coated with a metal molded stranded wire, a variable temperature layer, an alloy sheath and a graphene coating from inside to outside. The intelligent reinforced fiber composite material core comprises an optical fiber bundle, filling paste, a stainless steel tube and a reinforced fiber composite material layer from inside to outside, the metal stranded wire comprises a plurality of layers, each layer is formed by twisting and pressing a plurality of trapezoidal metal single wires, the adjacent layers are opposite in direction, and the metal stranded wire is formed by twisting a plurality of trapezoidal metal single wires. The overhead conductor has the advantages of high current-carrying capacity, high reliability and long service life.

Description

Technical Field

[0001] This invention relates to an overhead conductor, specifically to a high-performance intelligent reinforced fiber composite core overhead conductor and its preparation method. Background Technology

[0002] Carbon fiber composite core overhead conductors, as high-voltage transmission lines, have advantages such as high strength and lightweight, high-temperature operation capability, low sag, excellent fatigue and corrosion resistance, and low line loss.

[0003] Currently, there are two main structures for carbon fiber composite core overhead conductors.

[0004] The first structure uses a carbon fiber composite core and soft aluminum stranded wire. The main problem with this structure is: Galvanic corrosion occurs between the carbon fiber composite core and the soft aluminum stranded wire (i.e., the battery effect, with rainwater acting as the electrolyte), gradually damaging the structure of both the carbon fiber composite core and the soft aluminum stranded wire, ultimately affecting their electrical conductivity and mechanical properties.

[0005] Carbon fiber composite core overhead conductors are subject to strong winds. The overhead conductors are made of soft aluminum stranded wire without other protective layers. In acid rain environment, the surface of the soft aluminum stranded wire is slowly corroded, and its soft aluminum stranded wire structure is gradually destroyed, eventually affecting its conductivity. In addition, because there are gaps between the individual wires of the soft aluminum stranded wire, the wind resistance of the soft aluminum stranded wire is increased, which aggravates the damage of external forces to the overhead conductor.

[0006] To ensure a safe distance between overhead conductors between towers, spacers are installed between the towers to fix each overhead conductor. The fixing clamps are directly clamped onto the soft aluminum stranded wire of the overhead conductor. Due to the long-term force exerted by the fixing clamps on the overhead conductor, the individual wires of the soft aluminum stranded wire of the overhead conductor at the fixing clamp are easily damaged, ultimately affecting the normal use of the product.

[0007] The second structure is a carbon fiber composite core + aluminum cladding layer + soft aluminum stranded wire. In this structure, the aluminum cladding layer is a sealing sleeve that can prevent external rainwater from entering the carbon fiber composite core, effectively solving the problem of item 1 in the first structure. However, it still cannot solve the problems of item 2 and item 3 in the first structure.

[0008] In addition, because overhead conductors are laid between two towers, they are prone to severe icing in extremely cold weather. This causes a sharp increase in the weight of the overhead line. In addition, the overhead line contracts when it gets cold, which significantly increases the tension of the overhead conductor. When the tension exceeds the breaking strength of the overhead conductor, the line will break, causing line faults and power outages, which is extremely dangerous. Currently, no method for removing icing can fundamentally solve this problem.

[0009] As can be seen from the above description, the reliability and lifespan of overhead power lines still need to be improved. Summary of the Invention

[0010] In order to solve the above problems, the present invention provides a high-performance intelligent reinforced fiber composite core overhead conductor.

[0011] To achieve the above objectives, the technical solution of the present invention is as follows: This invention discloses a high-performance intelligent reinforced fiber composite core overhead conductor. The overhead conductor includes an intelligent reinforced fiber composite core, and the intelligent reinforced fiber composite core is surrounded from the inside out by metal profile stranded wire, a temperature-changing layer, an alloy sheath, and a graphene coating. The intelligent reinforced fiber composite core includes, from the inside out, an optical fiber bundle, a filler paste, a stainless steel tube, and a reinforcing fiber composite layer. The metal profile stranded wire is composed of multiple layers, each layer being formed by several trapezoidal metal profile single wires twisted and pressed together, with adjacent layers having opposite directions.

[0012] The stainless steel tube is located at the center of the intelligent reinforced fiber composite core. The optical fiber bundle includes multiple multimode optical fibers or single-mode optical fibers. The fibers of the reinforced fiber composite layer are specifically one of carbon fiber, basalt fiber, or a mixture of carbon fiber and basalt fiber.

[0013] The trapezoidal metal wires in each layer of the stranded wire are the same. The two adjacent trapezoidal metal wires in the same layer are tightly bonded and the surface of the stranded wire is smooth and round. The cross-sectional area deviation of the trapezoidal metal wires in different layers is no more than 10%, the compression coefficient is 0.97 or above, the outer layer pitch ratio is 10 to 18, and the inner layer pitch ratio is 14 to 22.

[0014] For a single-layer metal-type stranded wire, there are 5 to 6 trapezoidal metal-type single wires. For a two-layer metal-type stranded wire, there are 5 to 6 trapezoidal metal-type single wires in the inner layer and 10 to 12 trapezoidal metal-type single wires in the outer layer. For a three-layer metal-type stranded wire, there are 5 to 6 trapezoidal metal-type single wires in the inner layer, 10 to 12 trapezoidal metal-type single wires in the middle layer, and 15 to 18 trapezoidal metal-type single wires in the outer layer.

[0015] The temperature-changing layer consists of 6 or 8 identical tile-shaped metal tubes twisted together on the outside of the metal profile stranded wire. The 6 or 8 identical tile-shaped metal tubes are tightly bonded together to form a ring-shaped structure.

[0016] The alloy sheath is a metal sleeve covering the temperature-variable layer.

[0017] The graphene coating is graphene coated onto the alloy sheath.

[0018] The intelligent reinforced fiber composite core is located at the center of the overhead conductor, and its nominal area is 1 / 15 to 1 / 7 of the total nominal cross-section of the overhead conductor.

[0019] A method for preparing a high-performance intelligent reinforced fiber composite core overhead conductor includes: Step 1: Preparation of intelligent reinforced fiber composite mandrel, the pultrusion molding process includes: Step 1: Intelligent reinforcement of yarn feeding, the intelligent reinforcement is placed on the fiber yarn frame device with tension control.

[0020] Step 2: Intelligent reinforcement bundles are dispersed and positioned by using the wire-separating holes in the bundle plate, which creates a certain gap between the intelligent reinforcement bundles to ensure thorough impregnation.

[0021] Step 3: Resin impregnation. The intelligent reinforced bundle of fibers passes through a resin impregnation tank. The impregnation solution includes high-temperature modified epoxy resin, methyl hexahydrophthalic anhydride curing agent, 2-ethyl-4-methylimidazolium accelerator, and nano clay additive.

[0022] Step 4: The intelligent reinforcement bundles are positioned and concentrated using a precision yarn arranger, which ensures that the intelligent reinforcement bundles are evenly distributed after being bundled.

[0023] Step 5: Pre-forming, the resin is formed by using a pre-forming mold and excess resin is extruded. The molding temperature is 90℃~100℃.

[0024] Step 6: Heating and curing. Pultrusion curing is performed by heating the mold. This includes a gel zone (initial cross-linking of the resin), a curing zone (complete curing), and a cooling zone (curing and preventing warping). The temperature of the gel zone is 120℃~130℃, the temperature of the curing zone is 150℃~160℃, and the temperature of the cooling zone is 80℃~90℃.

[0025] Step 7: Traction and routing, which is carried out by a tracked traction machine. The center of the track surface has a V-groove, which can effectively ensure the roundness of the intelligent reinforcement mandrel.

[0026] Step 8: Wind up the yarn into a coil. The winding device winds up the yarn into a coil.

[0027] Step 2: Prepare the trapezoidal aluminum profile single wire used for metal profile stranded wire. The trapezoidal aluminum profile single wire is specifically an aluminum profile single wire drawn by drawing aluminum wire.

[0028] Step 3: Prepare the metal profile stranded wire, specifically by using a frame stranding machine to strand each layer of the aluminum profile stranded wire.

[0029] Step 4: Prepare the tile-shaped metal tube by longitudinally wrapping metal strips with argon arc welding.

[0030] Step 5: Prepare the temperature-changing layer. Specifically, a stranding machine is used to strand the tile-shaped metal tubes into cables outside the metal profile stranded wires.

[0031] Step 6: Prepare the alloy sheath by longitudinally wrapping the alloy strip with argon arc welding and then drawing and reducing its diameter, or by extruding it using a continuous extrusion coating machine.

[0032] Step 7: Prepare the graphene coating using a liquid phase coating method. The process steps include: Step 1: Preparation of graphene dispersion. GO or rGO raw materials are dispersed, and dispersants (PVP, CTAB) or thickeners (CMC) are added to adjust to a suitable concentration. The specific dispersion process for GO is ultrasonic exfoliation of graphene oxide → centrifugation to remove exfoliated particles. The dispersion process for rGO is GO dispersion + reducing agent (hydrazine hydrate, ascorbic acid) → heating reduction → washing until neutral.

[0033] Step 2: Substrate treatment, which involves cleaning and roughening. Cleaning is done by wiping with solvents (acetone, isopropanol) → plasma treatment / UV ozone activation of the surface. Roughening is specifically done by sandblasting.

[0034] Step 3: Coating process, using spraying method.

[0035] Step 4: Drying and curing. This involves pre-drying and high-temperature treatment. Pre-drying specifically removes the solvent to prevent cracking. High-temperature treatment involves thermal reduction of the GO coating (200℃~400℃ inert gas) or UV reduction, followed by annealing of the rGO coating (150℃~300℃) to improve its structural density.

[0036] Step 5: Functionalization and Composites: Composite coating and surface sealing are adopted. The composite coating is a mixed resin (epoxy, polyurethane) to improve mechanical strength, and the surface sealing is not coated with SiO2 or polymer layer to enhance scratch resistance.

[0037] The beneficial effects of this invention are: The overhead conductor of this invention has high current carrying capacity, high reliability, and long service life. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 , Figure 2 This is a schematic diagram of the structure of the present invention (wherein the metal wire strands have different numbers of layers). Detailed Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0041] See Figure 1 The invention provides a high-performance intelligent reinforced fiber composite core overhead conductor. The overhead conductor includes an intelligent reinforced fiber composite core 100. The intelligent reinforced fiber composite core 100 is surrounded from the inside out by a metal wire strand 200, a temperature-changing layer 300, an alloy sheath 400, and a graphene coating 500. The intelligent reinforced fiber composite core 100 includes, from the inside out, an optical fiber bundle 110, a filler paste 120, a stainless steel tube 130, and a reinforcing fiber composite layer 140. The metal wire strand 200 is composed of multiple layers, each layer being formed by several trapezoidal metal wires 210 twisted and compressed together, with adjacent layers in opposite directions.

[0042] The stainless steel tube 130 is located at the center of the intelligent reinforced fiber composite core 100. The optical fiber bundle 110 includes multiple multimode optical fibers or single-mode optical fibers. The fibers of the reinforced fiber composite layer 140 are specifically one of carbon fiber, basalt fiber, or a mixture of carbon fiber and basalt fiber. The optical fiber bundle 110 has a loose-fitting structure in the stainless steel tube 130. This allows the optical fiber bundle 110 to freely expand and contract within the filling paste 120 without damage when the overhead conductor expands and contracts with changes in external temperature. When the overhead conductor breaks due to external environmental factors, the communication function of the optical fiber bundle 110 can also promptly stop the power supply to the transmission line, preventing the broken high-voltage line from causing electrical hazards to the surrounding area.

[0043] The trapezoidal metal single wires 210 in each layer of the metal wire stranded wire 200 are the same. The two adjacent trapezoidal metal single wires 210 in the same layer are tightly bonded and the surface of the stranded wire is smooth and round. The cross-sectional area deviation of the trapezoidal metal single wires 210 in different layers is no more than 10%, the compression coefficient is 0.97 or above, the outer layer pitch diameter ratio is 10 to 18, and the inner layer pitch diameter is 14 to 22.

[0044] Furthermore, the material of the trapezoidal metal single wire 210 can be one of soft aluminum, aluminum alloy, or copper-clad aluminum. Since the intelligent reinforced fiber composite core 100 has a rated temperature resistance of 120℃ and above, the intelligent reinforced fiber composite core overhead conductor has a high current carrying capacity.

[0045] The metal-type stranded wire 200 has one layer, with 5 to 6 trapezoidal metal-type single wires 210. The metal-type stranded wire 200 has two layers, with 5 to 6 trapezoidal metal-type single wires 210 in the inner layer and 10 to 12 trapezoidal metal-type single wires 210 in the outer layer. The metal-type stranded wire 200 has three layers, with 5 to 6 trapezoidal metal-type single wires 210 in the inner layer, 10 to 12 trapezoidal metal-type single wires 210 in the middle layer, and 15 to 18 trapezoidal metal-type single wires 210 in the outer layer.

[0046] The variable temperature layer 300 consists of 6 or 8 identical tile-shaped metal tubes twisted together outside the metal profile stranded wire 200. These 6 or 8 identical tile-shaped metal tubes are tightly bonded together to form a ring-shaped structure. The variable temperature layer 300 contains circulating methyl silicone oil. The methyl silicone oil in the 3 or 4 tile-shaped metal tubes that are spaced apart flows in the same direction. The methyl silicone oil circulates between the two towers through a temperature-changing device. This device has both cooling and heating functions for the circulating methyl silicone oil. The working principle of the variable temperature layer 300 is as follows: when the overhead line carries a large current, the line temperature rises excessively, and the 3... Alternatively, methyl silicone oil in four separate tile-shaped metal tubes can flow the heat generated by the line to a temperature-changing device for cooling, and then circulate through another three or four separate tile-shaped metal tubes to further cool the line, thereby increasing the current carrying capacity of the entire line and achieving high-capacity power transmission. When the overhead line encounters extremely low temperatures and the line is severely iced, the cold methyl silicone oil in the three or four separate tile-shaped metal tubes can flow to a temperature-changing device for heating, and then circulate through another three or four separate tile-shaped metal tubes to further heat the line, thereby melting the ice on the overhead line and reducing the operational risk of the overhead line.

[0047] Furthermore, the material of the tile-shaped metal tube is soft aluminum or aluminum alloy. The temperature-changing layer 300 and the metal-type stranded wire 200 constitute a composite structure for carrying the current of the overhead conductor line. Methyl silicone oil has excellent thermal stability, excellent fluidity, chemical inertness, low surface tension and high insulation at -60℃ to 200℃. Through the temperature detection and temperature-changing device of the fiber bundle 110 of the overhead line, the temperature of the line can be automatically adjusted, which improves the operating environment of the overhead line, reduces the risk of damage to the overhead line from the harsh environment, and thus greatly improves the reliability and life of the line's safe operation.

[0048] The alloy sheath 300 is a metal sheath covering the metal profile stranded wire 200.

[0049] Furthermore, the alloy sheath 300 is made of an environmentally friendly alloy, which is environmentally friendly and not prone to corrosion or failure. The alloy sheath 300 has a sealed structure with good waterproof performance, which can effectively prevent external rainwater from entering the metal stranded wire 200 and the intelligent reinforced fiber composite core 100. The alloy sheath 300 has a circular structure, which has low wind resistance and reduces the effect of external forces. The alloy sheath 300 can be made of either brass or aluminum alloy. It can be made by longitudinally wrapping alloy strips with argon arc welding and then drawing and reducing the diameter. Aluminum alloy can also be extruded by a continuous extrusion coating machine.

[0050] The graphene coating 400 is graphene coated on the alloy sheath 300. The graphene coating is a dense barrier that effectively blocks the penetration of corrosive media such as water, oxygen, and chloride ions, extending the life of the alloy sheath. The high conductivity of graphene promotes the formation of a uniform potential field on the metal surface, inhibiting local galvanic corrosion. The nanoscale graphene coating can also destroy the cell membrane of microorganisms, thus having antibacterial and bacteriostatic effects.

[0051] The intelligent reinforced fiber composite core 100 is located at the center of the overhead conductor, and its nominal area is 1 / 15 to 1 / 7 of the total nominal cross-section of the overhead conductor.

[0052] Furthermore, the intelligent reinforced fiber composite core 100 is specifically made of intelligent reinforcement, resin matrix and auxiliary materials through processes such as fiber impregnation, preforming, and heat curing.

[0053] A method for preparing a high-performance intelligent reinforced fiber composite core overhead conductor includes: Step 1: Preparation of intelligent reinforced fiber composite mandrel, the pultrusion molding process includes: Step 1: Intelligent reinforcement of yarn feeding, the intelligent reinforcement is placed on the fiber yarn frame device with tension control.

[0054] Step 2: Intelligent reinforcement bundles are dispersed and positioned by using the wire-separating holes in the bundle plate, which creates a certain gap between the intelligent reinforcement bundles to ensure thorough impregnation.

[0055] Step 3: Resin impregnation. The intelligent reinforced bundle of fibers passes through a resin impregnation tank. The impregnation solution includes high-temperature modified epoxy resin, methyl hexahydrophthalic anhydride curing agent, 2-ethyl-4-methylimidazolium accelerator, and nano clay additive.

[0056] Step 4: The intelligent reinforcement bundles are positioned and concentrated using a precision yarn arranger, which ensures that the intelligent reinforcement bundles are evenly distributed after being bundled.

[0057] Step 5: Pre-forming, the resin is formed by using a pre-forming mold and excess resin is extruded. The molding temperature is 90℃~100℃.

[0058] Step 6: Heating and curing. Pultrusion curing is performed by heating the mold. This includes a gel zone (initial cross-linking of the resin), a curing zone (complete curing), and a cooling zone (curing and preventing warping). The temperature of the gel zone is 120℃~130℃, the temperature of the curing zone is 150℃~160℃, and the temperature of the cooling zone is 80℃~90℃.

[0059] Step 7: Traction and routing, which is carried out by a tracked traction machine. The center of the track surface has a V-groove, which can effectively ensure the roundness of the intelligent reinforcement mandrel.

[0060] Step 8: Wind up the yarn into a coil. The winding device winds up the yarn into a coil.

[0061] Step 2: Prepare the trapezoidal aluminum profile single wire used for metal profile stranded wire. The trapezoidal aluminum profile single wire is specifically an aluminum profile single wire drawn by drawing aluminum wire.

[0062] Step 3: Prepare the metal profile stranded wire, specifically by using a frame stranding machine to strand each layer of the aluminum profile stranded wire.

[0063] Step 4: Prepare the tile-shaped metal tube by longitudinally wrapping metal strips with argon arc welding.

[0064] Step 5: Prepare the temperature-changing layer. Specifically, a stranding machine is used to strand the tile-shaped metal tubes into cables outside the metal profile stranded wires.

[0065] Step 6: Prepare the alloy sheath by longitudinally wrapping the alloy strip with argon arc welding and then drawing and reducing its diameter, or by extruding it using a continuous extrusion coating machine.

[0066] Step 7: Prepare the graphene coating using a liquid phase coating method. The process steps include: Step 1: Preparation of graphene dispersion. GO or rGO raw materials are dispersed, and dispersants (PVP, CTAB) or thickeners (CMC) are added to adjust to a suitable concentration. The specific dispersion process for GO is ultrasonic exfoliation of graphene oxide → centrifugation to remove exfoliated particles. The dispersion process for rGO is GO dispersion + reducing agent (hydrazine hydrate, ascorbic acid) → heating reduction → washing until neutral.

[0067] Step 2: Substrate treatment, which involves cleaning and roughening. Cleaning is done by wiping with solvents (acetone, isopropanol) → plasma treatment / UV ozone activation of the surface. Roughening is specifically done by sandblasting.

[0068] Step 3: Coating process, using spraying method.

[0069] Step 4: Drying and curing. This involves pre-drying and high-temperature treatment. Pre-drying specifically removes the solvent to prevent cracking. High-temperature treatment involves thermal reduction of the GO coating (200℃~400℃ inert gas) or UV reduction, followed by annealing of the rGO coating (150℃~300℃) to improve its structural density.

[0070] Step 5: Functionalization and Composites: Composite coating and surface sealing are adopted. The composite coating is a mixed resin (epoxy, polyurethane) to improve mechanical strength, and the surface sealing is not coated with SiO2 or polymer layer to enhance scratch resistance.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A high-performance intelligent reinforced fiber composite core overhead conductor, characterized in that: The overhead conductor includes a smart reinforced fiber composite core, which is surrounded from the inside out by a metal profile stranded wire, a temperature-changing layer, an alloy sheath, and a graphene coating. The smart reinforced fiber composite core includes, from the inside out, an optical fiber bundle, a filler paste, a stainless steel tube, and a reinforcing fiber composite layer. The metal profile stranded wire consists of multiple layers, each layer being formed by several trapezoidal metal profile single wires twisted and pressed together, with adjacent layers in opposite directions.

2. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The stainless steel tube is located at the center of the intelligent reinforced fiber composite core. The optical fiber bundle includes multiple multimode optical fibers or single-mode optical fibers. The fibers of the reinforced fiber composite layer are specifically one of carbon fiber, basalt fiber, or a mixture of carbon fiber and basalt fiber.

3. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The trapezoidal metal wires in each layer of the stranded metal wire are identical. Adjacent trapezoidal metal wires in the same layer are tightly bonded and the surface of the stranded wire is smooth and round. The cross-sectional area deviation of the trapezoidal metal wires in different layers is no more than 10%, the compression coefficient is 0.97 or above, the outer layer pitch diameter ratio is 10 to 18, and the inner layer pitch diameter is 14 to 22.

4. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The metal-type stranded wire has one layer, with 5 to 6 trapezoidal metal-type single wires; the metal-type stranded wire has two layers, with 5 to 6 trapezoidal metal-type single wires in the inner layer and 10 to 12 trapezoidal metal-type single wires in the outer layer; the metal-type stranded wire has three layers, with 5 to 6 trapezoidal metal-type single wires in the inner layer, 10 to 12 trapezoidal metal-type single wires in the middle layer, and 15 to 18 trapezoidal metal-type single wires in the outer layer.

5. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The temperature-changing layer consists of 6 or 8 identical tile-shaped metal tubes twisted together on the outside of a metal profile stranded wire. The 6 or 8 identical tile-shaped metal tubes are tightly bonded together to form a ring-shaped structure.

6. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The alloy sheath consists of a metal sleeve covering the temperature-changing layer.

7. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The graphene coating is graphene coated on an alloy sheath.

8. The high-performance intelligent reinforced fiber composite core overhead conductor according to claim 1, characterized in that: The intelligent reinforced fiber composite core is located at the center of the overhead conductor, and its nominal area is 1 / 15 to 1 / 7 of the total nominal cross-section of the overhead conductor.

9. A method for preparing a high-performance intelligent reinforced fiber composite core overhead conductor, comprising: Step 1: Preparation of intelligent reinforced fiber composite mandrel, the pultrusion molding process includes: Step 1: Intelligent reinforcement of yarn feeding, the intelligent reinforcement is placed on the fiber yarn frame device with tension control; Step 2: Intelligent reinforcement bundles are dispersed and positioned by using the wire-separating holes in the bundle plate, which creates a certain gap between the intelligent reinforcement bundles to ensure thorough impregnation. Step 3: Resin impregnation. The intelligent reinforced bundle of fibers passes through a resin impregnation tank. The impregnation solution includes high-temperature modified epoxy resin, methyl hexahydrophthalic anhydride curing agent, 2-ethyl-4-methylimidazolium accelerator, and nano clay additive. Step 4: The intelligent reinforcement bundles are positioned and concentrated using a precision yarn arranger, which ensures that the intelligent reinforcement bundles are evenly distributed after being bundled. Step 5: Pre-forming, molding through a pre-forming mold and extruding excess resin, molding temperature 90℃~100℃; Step 6: Heat curing and shaping. Pultrusion is performed by heating the mold, which includes a gel zone (initial cross-linking of the resin), a curing zone (complete curing), and a cooling zone (shaping and preventing warping). The temperature of the gel zone is 120℃~130℃, the temperature of the curing zone is 150℃~160℃, and the temperature of the cooling zone is 80℃~90℃. Step 7: Traction and routing, which is carried out by a tracked traction machine. The center of the track surface has a V-groove, which can effectively ensure the roundness of the intelligent reinforcement mandrel. Step 8: Winding up the yarn into a coil, which is done by a winding device; Step 2: Prepare the trapezoidal aluminum profile single wire used for metal profile stranded wire. The trapezoidal aluminum profile single wire is specifically an aluminum profile single wire drawn from aluminum wire. Step 3: Prepare the metal profile stranded wire, specifically by using a frame stranding machine to strand each layer of the aluminum profile stranded wire; Step 4: Prepare the tile-shaped metal tube by longitudinally wrapping metal strips with argon arc welding; Step 5: Prepare the temperature-changing layer, specifically by using a stranding machine to strand the tile-shaped metal tubes into cables outside the metal profile stranded wires; Step 6: Prepare the alloy sheath by longitudinally wrapping the alloy strip with argon arc welding and then drawing and reducing its diameter, or by extruding it using a continuous extrusion coating machine. Step 7: Prepare the graphene coating using a liquid phase coating method. The process steps include: Step 1: Preparation of graphene dispersion. GO or rGO raw materials are dispersed, and dispersants (PVP, CTAB) or thickeners (CMC) are added to adjust the concentration to a suitable level. The specific dispersion process for GO is ultrasonic exfoliation of graphene oxide → centrifugation to remove the exfoliated particles. The dispersion process for rGO is GO dispersion + reducing agent (hydrazine hydrate, ascorbic acid) → heating reduction → washing until neutral. Step 2: Substrate treatment, which involves cleaning and roughening. Cleaning is done by wiping with solvents (acetone, isopropanol) → plasma treatment / UV ozone activation of the surface. Roughening is specifically done by sandblasting. Step 3: Coating process, using spray coating; Step 4: Drying and curing. This involves pre-drying and high-temperature treatment. Pre-drying specifically removes the solvent to prevent cracking. High-temperature treatment involves thermal reduction of the GO coating (200℃~400℃ inert gas) or UV reduction, followed by annealing of the rGO coating (150℃~300℃) to improve its structural density. Step 5: Functionalization and Composites: Composite coating and surface sealing are adopted. The composite coating is a mixed resin (epoxy, polyurethane) to improve mechanical strength, and the surface sealing is not coated with SiO2 or polymer layer to enhance scratch resistance.

Images