Bending-resistant steel ladle composite core overhead conductor and manufacturing method

Abstract

The invention relates to the technical field of power transmission and distribution overhead conductors, in particular to a bending-resistant steel ladle composite core overhead conductor and a manufacturing method thereof.The bending-resistant steel ladle composite core overhead conductor comprises a stranded core and an aluminum conductor, and the stranded core comprises a plurality of steel ladle composite material single cores; a plurality of steel ladle composite material single cores are stranded together to form a stranded core; the steel ladle composite material single core comprises an internal fiber composite material and an anti-impact and anti-bending protection structure wrapping the fiber composite material. A protective layer is arranged on the surface of the stranded core, and a plurality of layers of aluminum conductors are stranded outside the protective layer; the aluminum conductor is composed of a plurality of adjusting structures twisted on the surface of the protective layer. The overhead conductor has the characteristics of high strength, bending resistance and impact resistance. Due to the design of the fiber composite material inside the stranded core, the anti-impact anti-bending protection structure outside the stranded core and the protection layer, the stranded core can bear large external force impact and bending and is not prone to damage.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission and distribution overhead conductors, and in particular to a bending-resistant steel-clad composite core overhead conductor and a manufacturing method thereof. Background Art

[0002] With the development of the global economy and the continuous growth of energy demand, power transmission, as a key link in energy supply, has put forward higher and higher requirements on the performance and quality of overhead transmission and distribution lines. At the same time, in the context of pursuing sustainable development, the power industry has also been prompted to continuously seek more efficient and environmentally friendly transmission technologies and equipment.

[0003] In the field of overhead conductor technology, the traditional steel core aluminum stranded wire is a common overhead conductor, but it has some limitations. For example, the strength and bending resistance of the steel core aluminum stranded wire are relatively limited. In some complex geographical environments and climatic conditions, such as mountainous areas and strong wind areas, it is easy to be damaged due to a small bending radius or external impact, affecting the stability and safety of power transmission.

[0004] In summary, the existing overhead conductor technology still has deficiencies in terms of bending resistance and resistance to foreign objects, and cannot fully meet the growing demand for power transmission and the requirements of complex and diverse use environments. Therefore, it is necessary to develop a bending-resistant steel-clad composite core overhead conductor to avoid the above safety hazards. Summary of the invention

[0005] The purpose of the present invention is to invent a bending-resistant steel-clad composite core overhead conductor which is resistant to bending, impact, corrosion and aging.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a bending-resistant steel-clad composite core overhead conductor, comprising a twisted core and an aluminum conductor, wherein the twisted core comprises a plurality of steel-clad composite single cores twisted together; a protective layer is arranged on the surface of the twisted core, and a plurality of layers of aluminum conductors are twisted outside the protective layer.

[0007] Furthermore, the ladle composite material single core includes an internal fiber composite material and an anti-impact and anti-bending protective structure wrapped outside the fiber composite material.

[0008] Furthermore, the fiber composite material includes fibers and a bonding film agent, and the fibers include high temperature resistant fibers, fireproof fibers and cold resistant fibers.

[0009] Furthermore, the anti-impact and anti-bending protection structure is a steel tubular structure, a plurality of steel ladle composite material single cores are twisted together, and the anti-impact and anti-bending protection structure is deformed into a spiral elastic structure.

[0010] Furthermore, the anti-impact and anti-bending protective structure includes a deformation protection layer and a high and low temperature resistant layer, the high and low temperature resistant layer is arranged on the surface of the fiber composite material, and the outer surface of the high and low temperature resistant layer is provided with a deformation protection layer.

[0011] Furthermore, the protective layer includes a deformation protective layer and a high and low temperature resistant layer, the high and low temperature resistant layer is arranged on the surface of the twisted core, and the deformation protective layer is arranged outside the high and low temperature resistant layer.

[0012] Furthermore, the aluminum conductor includes a plurality of adjustment structures twisted on the surface of a twisted core, the adjustment structure is a trapezoidal structure, a plurality of adjustment structures are twisted on the outer surface of the twisted core, and the material of the adjustment structure is an aluminum alloy.

[0013] A method for manufacturing a bending-resistant steel-clad composite core overhead conductor comprises the following steps:

[0014] Provide multiple steel ladle composite single cores;

[0015] In a temperature environment of 100-300°C, multiple steel ladle composite single cores are twisted together to form a twisted core;

[0016] Providing a protective layer on the outside of the twisted core;

[0017] An aluminum conductor is disposed outside the protective layer.

[0018] Furthermore, providing a plurality of ladle composite material single cores specifically comprises: first preparing prepregs of high temperature fiber, fireproof fiber, cold-resistant fiber and bonding membrane agent, placing the prepared prepregs into the interior of the anti-impact and anti-bending protection structure through equipment to form the ladle composite material single core.

[0019] Furthermore, the aluminum conductor includes a plurality of adjustment structures, which are made of aluminum alloy and are twisted outside the protective layer.

[0020] Beneficial Effects

[0021] Compared with the traditional steel core aluminum stranded wire, the stranded core of the present invention adopts a more complex structural design, with a steel-clad composite material single core inside and a protective layer and aluminum conductor outside. This structure significantly improves its strength, bending resistance, impact resistance and other properties.

[0022] The overhead wire of the present invention has the characteristics of high strength, bending resistance and impact resistance. The fiber composite material inside the twisted core and the external anti-impact and anti-bending protective structure and the design of the protective layer enable it to withstand large external impact and bending without being easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the bending-resistant steel-clad composite core overhead conductor disclosed in the present invention;

[0025] Figure 2 It is a schematic diagram of the twisted core structure of the bending-resistant steel-clad composite core overhead conductor disclosed in the present invention;

[0026] Figure 3 The invention discloses a schematic diagram of the protective layer and aluminum conductor structure of the bending-resistant steel-clad composite core overhead conductor.

[0027] In the figure:

[0028] 1-twisted core; 101-fiber composite material; 102-anti-impact and anti-bending protective structure; 103-protective layer; 2-aluminum conductor; 201-adjusting structure. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] To achieve the above object, the present invention provides the following technical solutions: Figure 1-3 As shown, a bending-resistant steel-clad composite core overhead conductor includes a twisted core 1 and an aluminum conductor 2. The twisted core 1 includes multiple steel-clad composite single cores; multiple steel-clad composite single cores are twisted together to form a twisted core 1; the twisted core 1 is self-locked together by twisting multiple steel-clad composite single cores. During the twisting process, a spiral elastic structure is formed on the surface of each steel-clad composite single core to achieve the purpose of self-locking twisting. When subjected to external force, the spiral elastic structure absorbs energy and returns to its original state after the force disappears, thereby improving the bending resistance and impact resistance of the conductor.

[0031] Furthermore, the ladle composite material single core includes an internal fiber composite material 101 and an anti-impact and anti-bending protective structure 102 wrapped around the outside of the fiber composite material 101; the twisted core 1 withstands external force by twisting the ladle composite material single core together; the fiber composite material 101 inside the ladle composite material single core provides high temperature resistance, fire resistance, cold resistance and other properties, and the external anti-impact and anti-bending protective structure 102 enhances the impact resistance and bending resistance of the single core and protects the internal fiber composite material 101.

[0032] Furthermore, the fiber composite material 101 includes fibers and a bonding agent, and specific fibers include high temperature resistant fibers, fireproof fibers, and cold resistant fibers.

[0033] Furthermore, the anti-impact and anti-bending protection structure 102 is a steel tubular structure. When a plurality of steel ladle composite material single cores are twisted together, the anti-impact and anti-bending protection structure 102 is deformed into a spiral elastic structure.

[0034] Furthermore, the anti-impact and anti-bending protective structure 102 includes a deformation protective layer and a high and low temperature resistant layer. The high and low temperature resistant layer is close to the surface of the fiber composite material 101, and the outer surface of the high and low temperature resistant layer is provided with a steel deformation protective layer; wherein the high and low temperature resistant layer is made of temperature-resistant fiber, which can reduce the influence of temperature changes on the fiber composite material, ensure the stability of the performance of the fiber composite material 101 under different temperature environments, thereby ensuring the performance of the entire conductor; the deformation protective layer can deform and absorb energy when the conductor is impacted or bent by external force, thereby enhancing the impact resistance and bending resistance of the conductor.

[0035] Furthermore, the structure of the protective layer 103 is similar to the anti-impact and anti-bending protective structure 102; it includes a deformation protective layer and a high and low temperature resistant layer, the high and low temperature resistant layer of the protective layer 103 is close to the surface of the twisted core 1, and the deformation protective layer is arranged on the surface of the high and low temperature resistant layer. The protective layer 103 is tightly wrapped around the outside of the twisted core 1, forming a whole with the twisted core 1, and jointly bearing the influence of external forces and environmental factors, ensuring the stable performance of the fiber composite material 101 under different temperature environments, and at the same time, when the conductor is impacted or bent by external forces, the protective layer 103 deforms to absorb energy, further enhancing the conductor's impact resistance and bending resistance.

[0036] Furthermore, a protective layer 103 is provided on the surface of the twisted core 1, and a multi-layer aluminum conductor 2 is twisted outside the protective layer 103; the aluminum conductor 2 is composed of a plurality of adjustment structures 201 twisted on the surface of the twisted core 1; the aluminum conductor 2 is used to conduct current. The adjustment structure 201 is set as a trapezoidal structure, and the adjustment structure 201 is twisted on the outer surface of the twisted core 1. The adjustment structure 201 can be twisted on the twisted core 1 in multiple layers. The adjustment structure 201 is used to conduct current and is made of aluminum alloy.

[0037] The working principle of the bending-resistant steel-clad composite core overhead conductor of the present invention is as follows:

[0038] The twisted core 1 is self-locked by twisting a plurality of steel-clad composite single cores. During the twisting process, the anti-impact and anti-bending protective structure 102 of each steel-clad composite single core is twisted into a spiral elastic structure to achieve the purpose of self-locking twisting. When subjected to external force, the spiral elastic structure absorbs energy and returns to its original state after the force disappears, thereby improving the bending resistance and impact resistance of the conductor.

[0039] The deformation protection layer of the protection layer 103 also participates in the force absorption process. When the external force is large, the deformation protection layer of the protection layer 103 can be deformed and work together with the twisted core 1 to further buffer the impact of the external force on the wire and protect the internal structure from damage.

[0040] The high temperature resistant fiber, fireproof fiber and cold resistant fiber in the fiber composite material 101, as well as the high and low temperature resistant layer in the protective layer 103, together ensure the stable performance of the twisted core 1 under different temperature environments. In a high temperature environment, the high temperature resistant fiber can prevent the material performance from degrading, and avoid problems such as softening and deformation of the conductor due to excessive temperature. In a low temperature environment, the cold resistant fiber can maintain its flexibility and mechanical properties, ensuring that the conductor can work normally.

[0041] A method for manufacturing a bending-resistant steel-clad composite core overhead conductor comprises the following steps:

[0042] S1. Provide multiple steel ladle composite material single cores;

[0043] Furthermore, providing a plurality of ladle composite material single cores specifically includes: first preparing prepregs of high-temperature fiber, fire-proof fiber, cold-resistant fiber and bonding membrane agent, placing the prepared prepregs into the interior of the anti-impact and anti-bending protection structure 102 through equipment to form the ladle composite material single core.

[0044] S2, under a temperature environment of 100-300°C, twisting a plurality of steel ladle composite material single cores together to form a twisted core 1;

[0045] S3, providing a protective layer 103 outside the twisted core 1;

[0046] S4. An aluminum conductor 2 is arranged outside the protective layer 103.

[0047] The specific implementation process of a method for manufacturing a bending-resistant steel-clad composite core overhead conductor:

[0048] To prepare the single core of the steel ladle composite material, it is necessary to first prepare the prepreg. According to the design requirements, the dosage of high temperature resistant fiber, fireproof fiber, cold resistant fiber and bonding agent is accurately weighed. The fiber and bonding agent are mixed by stirring and impregnation to ensure that the fiber is evenly wrapped by the bonding agent to form a prepreg. In this process, the ratio of fiber and bonding agent, as well as the mixing time and temperature and other parameters must be strictly controlled to ensure the quality of the prepreg.

[0049] The prepared prepreg is placed into the tubular structure of the anti-impact and anti-bending protective structure 102 through the equipment mold. During the placement process, it is necessary to ensure that the prepreg is filled evenly without gaps. Pressure filling or other suitable methods can be used to make the prepreg tightly filled in the tube to form a steel-clad composite material single core.

[0050] The preparation of the twisted core 1 requires placing a plurality of steel ladle composite material single cores in a twisting device. The twisting device is started and twisted according to the set twisting parameters. During the twisting process, the twisting speed and strength must be controlled to avoid damage to the steel ladle composite material single core.

[0051] While twisting, the twisted core 1 is heated and cured by a heating and curing device. In the heating and curing device, the bonding film agent of the steel ladle composite material single core undergoes a curing reaction under a temperature environment of 100-300°C, so that the internal fibers are tightly combined. It is necessary to keep the temperature for a certain period of time so that the bonding film agent can achieve the best curing effect.

[0052] Then a protective layer 103 is arranged on the outside of the twisted core 1; the protective layer 103 includes a deformation protective layer and a high and low temperature resistant layer; the protective layer 103 is coated on the outer surface of the twisted core 1; the deformation protective layer is made of steel material, and a high and low temperature resistant layer is arranged on the side of the protective layer 103 close to the twisted core 1; the high and low temperature resistant layer is made of suitable temperature-resistant fiber.

[0053] Finally, an aluminum conductor 2 is disposed outside the protective layer 103; the aluminum conductor 2 includes a plurality of adjustment structures 201, which are made of aluminum alloy material, and the shape and size of the adjustment structure 201 are precisely controlled according to design requirements. In this embodiment, the adjustment structure 201 is a trapezoidal structure, such as Figure 1 As shown, a plurality of adjusting structures 201 are closely arranged together. During the assembly process, a mechanical twisting device can be used to evenly twist the adjusting structures 201 outside the protective layer 103 ; at the same time, a good overall structure is formed with the twisted core 1 and the protective layer.

[0054] In actual work, according to specific power transmission requirements, a multi-layer adjustment structure 201 can be twisted outside the protective layer 103 to increase the cross-sectional area of ​​the conductor and ensure that the aluminum conductor can effectively conduct current.

[0055] The manufacturing method of the present invention involves the preparation and combination of multiple materials, such as the preparation of fiber composite material 101 prepreg, the molding of steel ladle composite material single core, the curing of twisted core 1, and the preparation of protective layer 103 and aluminum conductor 2. Compared with some traditional wire manufacturing methods, it is more complicated and delicate, but it is this delicate manufacturing method that ensures the high performance of the product.

[0056] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A bending-resistant steel-clad composite core overhead conductor, characterized in that: The invention comprises a twisted core (1) and an aluminum conductor (2), wherein the twisted core (1) comprises a plurality of steel-clad composite material single cores twisted together; a protective layer (103) is arranged on the surface of the twisted core (1), and a plurality of layers of aluminum conductors (2) are twisted outside the protective layer (103).

2. The bending-resistant steel-clad composite core overhead conductor according to claim 1, characterized in that: The ladle composite material single core comprises an internal fiber composite material (101) and an impact-resistant and bending-resistant protective structure (102) wrapped outside the fiber composite material (101).

3. The bending-resistant steel-clad composite core overhead conductor according to claim 2, characterized in that: The fiber composite material (101) comprises fibers and a bonding film agent, wherein the fibers comprise at least one of high temperature resistant fibers, fireproof fibers and cold resistant fibers.

4. The bending-resistant steel-clad composite core overhead conductor according to claim 2, characterized in that: The anti-impact and anti-bending protective structure (102) is a steel tubular structure, with a plurality of steel-clad composite material single cores twisted together, and the anti-impact and anti-bending protective structure (102) is deformed into a spiral elastic structure.

5. The bending-resistant steel-clad composite core overhead conductor according to claim 4, characterized in that: The impact-resistant and bending-resistant protective structure (102) comprises a deformation protection layer and a high and low temperature resistant layer, wherein the high and low temperature resistant layer is arranged on the surface of the fiber composite material (101), and the outer surface of the high and low temperature resistant layer is provided with a deformation protection layer.

6. The bending-resistant steel-clad composite core overhead conductor according to claim 1, characterized in that: The protective layer (103) comprises a deformation protective layer and a high and low temperature resistant layer, wherein the high and low temperature resistant layer is arranged on the surface of the twisted core 1, and the deformation protective layer is arranged outside the high and low temperature resistant layer.

7. The bending-resistant steel-clad composite core overhead conductor according to claim 1, characterized in that: The aluminum conductor (2) comprises a plurality of adjustment structures (201) twisted on the surface of a twisted core (1); the adjustment structure (201) is a trapezoidal structure; a plurality of adjustment structures (201) are twisted on the outer surface of the twisted core (1); and the material of the adjustment structure (201) is an aluminum alloy material.

8. A method for manufacturing a bending-resistant steel-clad composite core overhead conductor, characterized in that: The following steps are involved: Provide multiple steel ladle composite single cores; Under a temperature environment of 100-300° C., a plurality of steel ladle composite material single cores are twisted together to form a twisted core (1); A protective layer (103) is arranged outside the twisted core (1); An aluminum conductor (2) is arranged outside the protective layer (103).

9. The method for manufacturing the bending-resistant steel-clad composite core overhead conductor according to claim 8, characterized in that: Providing a plurality of ladle composite material single cores specifically comprises: first preparing prepregs of high temperature fiber, fireproof fiber, cold-resistant fiber and bonding film agent, and placing the prepared prepregs into the interior of the anti-impact and anti-bending protection structure (102) through equipment to form the ladle composite material single cores.

10. The method for manufacturing the bending-resistant steel-clad composite core overhead conductor according to claim 8, characterized in that: The aluminum conductor (2) comprises a plurality of adjustment structures (201), the adjustment structures (201) are made of an aluminum alloy material, and the adjustment structures (201) are twisted outside the protective layer (103).

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