Measurable carbon fiber composite core soft aluminum molded wire stranded wire

Abstract

The invention relates to the technical field of overhead conductors, and discloses a measurable carbon fiber composite core soft aluminum molded wire stranded wire, which comprises a composite core and four groups of optical fibers arranged in the composite core, and the four groups of optical fibers in the composite core are uniformly distributed in four quadrants taking the center of the composite core as an original point. According to the testable carbon fiber composite core soft aluminum molded wire stranded wire, four groups of optical fibers are installed in the composite core, and when the composite core is damaged, the optical fibers are damaged, so that the integrity of the wire is tested before production, the integrity of the wire can be tested after production, and the integrity of the wire can be tested before installation; the integrity of the wire can be tested after installation, the integrity of the wire composite core before and after construction is guaranteed to a large extent, and compared with an existing conventional carbon fiber core, the core rod has the advantage that the integrity of the core rod can be detected before and after production and before and after construction.

Description

Technical Field

[0001] The invention relates to the technical field of overhead conductors, in particular to a testable carbon fiber composite core soft aluminum stranded wire. Background Art

[0002] Conductors are components used to conduct current and transmit electric energy. Generally, there is one overhead bare conductor per phase. 220kV and above lines use phase split conductors due to their large transmission capacity and to reduce corona loss and corona interference, that is, two or more conductors are used per phase. Split conductors can transmit larger amounts of electric energy with less power loss and better anti-vibration performance. Conductors are often tested by various natural conditions during operation and must have good electrical conductivity, high mechanical strength, light weight, low price, and strong corrosion resistance. Since my country's aluminum resources are more abundant than copper and the price difference between aluminum and copper is large, steel core aluminum stranded wires are almost always used. Each conductor is only allowed to have one joint in each span. When crossing roads, rivers, railways, important buildings, power lines, and communication lines, conductors and lightning arresters must not have joints.

[0003] Compared with steel core aluminum stranded wire, conventional carbon fiber overhead conductors have the advantages of low density, light unit weight, high strength, small sag, small thermal expansion coefficient, high temperature resistance, large current carrying capacity and high conductivity. They have important social and economic significance in the fields of capacity expansion and transformation and large-span transmission lines.

[0004] For example, the Chinese patent with the publication number CN210245123U discloses a carbon fiber composite core soft aluminum stranded wire, including a carbon fiber composite core and an aluminum stranded wire layer twisted outside the carbon fiber composite core; the carbon fiber composite core includes a carbon fiber core, a glass fiber mesh layer is coated outside the carbon fiber core, and an epoxy resin protective layer is arranged outside the glass fiber mesh layer; the aluminum stranded wire layer is at least two layers, each layer of the aluminum stranded wire layer is twisted by a number of aluminum conductors with a trapezoidal cross section, and the inner and outer surfaces of the trapezoidal aluminum conductors are both arc surfaces; the carbon fiber core is a carbon fiber bundle composed of a number of carbon fibers. After the carbon fiber composite core replaces the galvanized steel wire or the aluminum clad steel core, the conductor is light in weight and high in strength, and has small sag under the same operating stress; the aluminum stranded wire conductor has a small linear expansion coefficient and small sag within the operating temperature range from the lowest temperature to the highest temperature; the aluminum stranded wire conductor has a small outer diameter, and the wind deflection and ice load of the conductor during operation are small, which can save the construction cost of the transmission line.

[0005] Although carbon fiber conductors have many advantages, they also have their shortcomings. For example, most carbon fiber conductors are single-core and are easily damaged during construction. The damage is difficult to detect with the naked eye, and there will be safety hazards in the later operation of carbon fiber conductors. Summary of the invention

[0006] In view of the fact that the above-mentioned existing carbon fiber conductor is a single core and is easily damaged during construction, and the damage is difficult to detect by naked eye observation, and there will be potential safety hazards in the later operation of the carbon fiber conductor, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a testable carbon fiber composite core soft aluminum profile wire stranded wire, the purpose of which is to test the integrity of the conductor before production, test the integrity of the conductor after production, test the integrity of the conductor before installation, and test the integrity of the conductor after installation, thereby ensuring the integrity of the conductor composite core before and after construction to a large extent.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a measurable carbon fiber composite core soft aluminum profile wire stranded wire, comprising a composite core, an inner soft aluminum wire layer arranged on the surface of the composite core, an outer soft aluminum wire layer arranged on the surface of the inner soft aluminum wire layer, and four groups of optical fibers arranged in the composite core.

[0009] As a preferred solution of the testable carbon fiber composite core soft aluminum profile stranded wire of the present invention, the four groups of optical fibers in the composite core are evenly distributed in four quadrants with the center of the composite core as the origin.

[0010] As a preferred solution of the testable carbon fiber composite core soft aluminum profile wire stranded wire of the present invention, the inner soft aluminum wire layer is composed of nine groups of first soft aluminum wires, and the nine groups of first soft aluminum wires are tightly twisted on the surface of the composite core.

[0011] As a preferred solution of the testable carbon fiber composite core soft aluminum profile wire stranded wire of the present invention, the outer soft aluminum wire layer is composed of twelve groups of second soft aluminum wires, and the twelve groups of second soft aluminum wires are tightly twisted on the surface of the inner soft aluminum wire layer.

[0012] As a preferred solution of the testable carbon fiber composite core soft aluminum profile wire stranded wire of the present invention, the first soft aluminum wire and the second soft aluminum wire are in the shape of profile wires, and the cross-sections of the first soft aluminum wire and the second soft aluminum wire are flat.

[0013] As a preferred solution of the testable carbon fiber composite core soft aluminum profile wire stranded wire of the present invention, the first soft aluminum wire and the second soft aluminum wire are annealed aluminum wires, and the single wire tensile strength is 60-95 MPa, and the first soft aluminum wire and the second soft aluminum wire are high conductivity single wires, and the conductivity is not less than 63% IACS.

[0014] As a preferred solution of the testable carbon fiber composite core soft aluminum profile wire stranded wire of the present invention, wherein: the composite core is filled with carbon fiber material.

[0015] As a preferred solution of the testable carbon fiber composite core soft aluminum profile stranded wire of the present invention, the surface of the composite core is covered with a fiber mesh layer, and the surface of the fiber mesh layer is covered with a protective layer.

[0016] Beneficial effects of the present invention:

[0017] 1. The present invention installs four groups of optical fibers in the composite core. When the composite core is damaged, the optical fibers will also be damaged, so that the integrity of the conductor can be tested before production, the integrity of the conductor can be tested after production, the integrity of the conductor can be tested before installation, and the integrity of the conductor can be tested after installation. The integrity of the conductor composite core before and after construction is guaranteed to a large extent. Compared with the existing conventional carbon fiber core, it has the advantage of being able to detect the integrity of the core rod before and after production and before and after construction.

[0018] 2. The present invention also solves the problem of potential safety hazards in the later operation of the composite core when the composite core is damaged, and retains the advantages of carbon fiber conductors such as light weight, small sag, small thermal expansion coefficient, high temperature resistance, large current carrying capacity and high conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the testable carbon fiber composite core soft aluminum profile wire stranded wire of the present invention.

[0021] Figure 2 It is a schematic diagram of the unfolded three-dimensional structure of the testable carbon fiber composite core soft aluminum profile wire strand of the present invention.

[0022] Figure 3 It is a schematic diagram of the main cross-sectional structure of the testable carbon fiber composite core soft aluminum profile wire strand of the present invention.

[0023] Description of reference numerals:

[0024] 1. Composite core; 2. Inner soft aluminum wire layer; 3. Outer soft aluminum wire layer; 4. Optical fiber; 5. First soft aluminum wire; 6. Second soft aluminum wire; 7. Fiber mesh layer; 8. Protective layer. DETAILED DESCRIPTION

[0025] 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.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0028] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Reference Figure 1-3 , as an embodiment of the present invention, provides a testable carbon fiber composite core soft aluminum profile stranded wire, the testable carbon fiber composite core soft aluminum profile stranded wire comprises a composite core 1, an inner soft aluminum wire layer 2 arranged on the surface of the composite core 1, an outer soft aluminum wire layer 3 arranged on the surface of the inner soft aluminum wire layer 2, and four groups of optical fibers 4 arranged in the composite core 1.

[0030] The four groups of optical fibers 4 in the composite core 1 are evenly distributed in four quadrants with the center of the composite core 1 as the origin.

[0031] The inner soft aluminum wire layer 2 is composed of nine groups of first soft aluminum wires 5, and the nine groups of first soft aluminum wires 5 are tightly twisted on the surface of the composite core 1. The outer soft aluminum wire layer 3 is composed of twelve groups of second soft aluminum wires 6, and the twelve groups of second soft aluminum wires 6 are tightly twisted on the surface of the inner soft aluminum wire layer 2. Through the twisting setting, multiple groups of first soft aluminum wires 5 and second soft aluminum wires 6 are tightly wound and can withstand greater mechanical stress, such as bending and stretching, thereby improving the durability and reliability of the composite core 1. At the same time, through twisting, multiple first soft aluminum wires 5 and second soft aluminum wires 6 can occupy less space, thereby reducing the outer diameter of the composite core 1, which is very useful for dense wiring and connection of high-density equipment, and can save space and improve wiring efficiency.

[0032] The first soft aluminum wire 5 and the second soft aluminum wire 6 are in the shape of profile wires, and the cross-sections of the first soft aluminum wire 5 and the second soft aluminum wire 6 are flat. The first soft aluminum wire 5 and the second soft aluminum wire 6 are annealed aluminum wires, and the single wire tensile strength is 60 to 95 MPa. The first soft aluminum wire 5 and the second soft aluminum wire 6 are high conductivity single wires, and the conductivity is not less than 63% IACS.

[0033] The composite core 1 is filled with carbon fiber material. A fiber mesh layer 7 is provided on the surface of the composite core 1 . A protective layer 8 is provided on the surface of the fiber mesh layer 7 . The protective layer 8 protects the composite core 1 .

[0034] During use, four groups of optical fibers 4 are installed in the composite core 1. When the composite core 1 is damaged, the optical fibers 4 will also be damaged. Therefore, the integrity of the composite core 1 can be tested before production, and then tested again after production. At the same time, the integrity of the composite core 1 is also tested before installation, and the integrity of the composite core 1 is tested again after installation. Compared with the current conventional carbon fiber core, it has the advantage of being able to detect the integrity of the core rod before and after production and before and after construction. At the same time, it can also solve the problem of safety hazards in later operation, and also retain the advantages of carbon fiber conductors such as light weight, small sag, small thermal expansion coefficient, high temperature resistance, large current carrying capacity and high conductivity.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A testable carbon fiber composite core soft aluminum profile stranded wire, comprising a composite core (1), characterized in that: An inner soft aluminum wire layer (2) arranged on the surface of the composite core (1), an outer soft aluminum wire layer (3) arranged on the surface of the inner soft aluminum wire layer (2), and four groups of optical fibers (4) arranged in the composite core (1).

2. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 1, characterized in that: The four groups of optical fibers (4) in the composite core (1) are evenly distributed in four quadrants with the center of the composite core (1) as the origin.

3. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 1, characterized in that: The inner soft aluminum wire layer (2) is composed of nine groups of first soft aluminum wires (5), and the nine groups of first soft aluminum wires (5) are tightly twisted on the surface of the composite core (1).

4. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 3, characterized in that: The outer soft aluminum wire layer (3) is composed of twelve groups of second soft aluminum wires (6), and the twelve groups of second soft aluminum wires (6) are tightly twisted on the surface of the inner soft aluminum wire layer (2).

5. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 4, characterized in that: The first soft aluminum wire (5) and the second soft aluminum wire (6) are in the shape of profile wires, and the cross-sections of the first soft aluminum wire (5) and the second soft aluminum wire (6) are flat.

6. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 5, characterized in that: The first soft aluminum wire (5) and the second soft aluminum wire (6) are annealed aluminum wires, and the single wire tensile strength is 60-95 MPa. The first soft aluminum wire (5) and the second soft aluminum wire (6) are high conductivity single wires, and the conductivity is not less than 63% IACS.

7. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 1, characterized in that: The composite core (1) is filled with carbon fiber material.

8. The testable carbon fiber composite core soft aluminum profile stranded wire according to claim 7, characterized in that: The surface of the composite core (1) is covered with a fiber mesh layer (7), and the surface of the fiber mesh layer (7) is covered with a protective layer (8).

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