Cluster type carbon fiber composite core wire structure

Abstract

The utility model belongs to the technical field of overhead transmission lines, and discloses a clustered carbon fiber composite core wire structure, which comprises a clustered carbon fiber composite core wire and a titanium alloy connecting fitting arranged at the connecting end of the clustered carbon fiber composite core wire, the cluster type carbon fiber composite core wire comprises a cluster type carbon fiber composite core rod and an aluminum alloy stranded wire layer wrapping the cluster type carbon fiber composite core rod. The cluster type carbon fiber composite core rod is formed by bundling a plurality of carbon fiber single cores in parallel to form a cluster body and binding and fixing the cluster body; the titanium alloy connecting fitting is made of a titanium alloy material. The technical scheme of the utility model can reduce the risk of line breakage caused by construction, has the advantages of light weight and good corrosion resistance, and can effectively improve the operation reliability of the power transmission line in the scenes of heavy icing, heavy corrosion, large span and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of overhead power transmission lines, and particularly relates to a bundled carbon fiber composite core conductor structure. Background Art

[0002] When overhead transmission lines pass through natural environments such as heavy icing, large spans, and severe corrosion, they may suffer line breakage accidents due to insufficient tensile strength, which will cause line shutdown and result in significant economic and social losses.

[0003] At present, in view of the above-mentioned natural environment, when facing the capacity expansion and reconstruction of transmission lines, single-core carbon fiber composite core conductors are generally used. This type of conductor can, to a certain extent, solve the demand for doubling the transmission capacity of transmission lines; however, it still has the disadvantages of a high risk of disconnection caused by construction, heavy weight, and poor corrosion resistance. Specifically, the existing single-core carbon fiber composite core conductors have poor bending resistance, are easily damaged during construction, and have high construction technology requirements, so the risk of disconnection caused by construction is relatively high; in addition, the connection hardware and protective hardware used in conjunction with the single-core carbon fiber composite core conductors are usually made of hot-dip galvanized steel, which is easily corroded under long-term operating conditions and is heavy. Utility Model Content

[0004] The purpose of this utility model is to provide a bundled carbon fiber composite core conductor structure to address one or more of the above-mentioned technical problems. The technical solution provided by this utility model can reduce the risk of line breakage during construction, and has the advantages of being lightweight and corrosion-resistant, effectively improving the operational reliability of transmission lines in scenarios such as heavy icing, severe corrosion, and long spans.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a bundled carbon fiber composite core conductor structure, comprising: a bundled carbon fiber composite core conductor and a titanium alloy connecting hardware arranged at the connecting end of the bundled carbon fiber composite core conductor; wherein,

[0007] The bundled carbon fiber composite core conductor comprises a bundled carbon fiber composite core rod and an aluminum alloy stranded wire layer wrapped around the bundled carbon fiber composite core rod;

[0008] The bundled carbon fiber composite core rod is formed by bundling multiple carbon fiber single cores in parallel to form a bundle body, which is then tied and solidified.

[0009] The titanium alloy connecting fitting is made of titanium alloy material.

[0010] A further improvement of the present invention is that:

[0011] In the bundled carbon fiber composite core rod, a bundle formed by parallel bundling of multiple carbon fiber single cores is braided and bound with aramid yarns, and is bidirectionally coated and solidified in clockwise and counterclockwise directions with aluminum foil.

[0012] A further improvement of the present invention is that:

[0013] The tensile strength of the bundled carbon fiber composite core rod is greater than or equal to 2400 MPa;

[0014] The maximum operating temperature of the bundled carbon fiber composite core conductor is greater than or equal to 160°C.

[0015] A further improvement of the present invention is that:

[0016] The titanium alloy connection fittings include an insulator, a ball head hanging ring, a first U-shaped hanging ring, a first extended pull ring, a right-angle hanging plate, a second extended pull ring and a second U-shaped hanging ring connected in sequence; wherein,

[0017] The insulator is used to connect to the connection end of the bundled carbon fiber composite core conductor, and the second U-shaped hanging ring is used to connect to the transmission line tower; the ball head hanging ring, the first U-shaped hanging ring, the first extended pull ring, the right-angle hanging plate, the second extended pull ring and the second U-shaped hanging ring are all made of titanium alloy.

[0018] A further improvement of the present invention is that:

[0019] Also includes: titanium alloy protective hardware;

[0020] The bundled carbon fiber composite core conductor structure adopts a split conductor conductor installation method, and the titanium alloy protective hardware is arranged between each bundled carbon fiber composite core conductor as a split conductor sub-conductor; the titanium alloy protective hardware is made of titanium alloy material.

[0021] A further improvement of the present invention is that:

[0022] The titanium alloy protective hardware includes: a titanium alloy wire clamp, a sub-conductor spacer rod frame and a connecting device;

[0023] There are multiple titanium alloy wire clamps, each used to connect to each bundled carbon fiber composite core conductor; the titanium alloy wire clamp is arranged on the sub-conductor spacer rod frame through the connecting device.

[0024] A further improvement of the present invention is that:

[0025] The titanium alloy wire clamp and the sub-conductor spacer frame are both made of titanium alloy;

[0026] The connecting device is made of synthetic rubber.

[0027] A further improvement of the present invention is that:

[0028] The titanium alloy wire clamp adopts a double pendulum anti-dance device wire clamp;

[0029] The sub-conductor spacer bar frame adopts a rotary wire clamp frame.

[0030] A further improvement of the present invention is that:

[0031] Also includes: titanium alloy limit wire clamp;

[0032] The titanium alloy limit wire clamp is made of titanium alloy and is used to maintain a clamping state of the bundled carbon fiber composite core conductor during the disassembly and assembly and intermediate connection construction process to ensure that the wire laying operation or the wire tightening operation is completed.

[0033] A further improvement of the present invention is that:

[0034] The carbon fiber single core includes a carbon fiber core and a glass fiber coating layer arranged outside the carbon fiber core.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] Although the single-core carbon fiber conductors in the existing technology have shown significant advantages in terms of conductivity and strength, the limitations of their anti-bending ability have become a problem that cannot be ignored during the construction and subsequent use stages. It not only increases the difficulty of construction, but also buries serious safety hazards and poses a threat to the stable operation of the power system. In response to the above-mentioned bottlenecks in the existing technology, the utility model proposes a new bundled carbon fiber composite core conductor structure. Through precise design and process optimization, this structure scientifically combines multiple carbon fiber single cores to form a composite core with higher toughness and anti-bending strength. This bundled design not only effectively disperses the stress generated during bending, significantly improving the overall anti-bending ability of the conductor, but also ensures the stability and reliability of the conductor under complex working conditions, thereby providing a solid guarantee for the safe operation of the power system. In addition, considering that the traditional supporting connection hardware and other hardware are mostly made of galvanized steel, the problems of heavy weight and poor long-term corrosion resistance seriously restrict the full performance and long-term service life of carbon fiber conductors. The present invention introduces titanium alloy as an alternative. Titanium alloy is known for its high strength, low density (i.e., lightweight) and excellent corrosion resistance. When used with carbon fiber composite core conductors, it not only achieves a significant reduction in system weight (for example, the weight reduction can reach 40%), but also improves the strength of the overall structure (for example, it can be increased by about 25%). This revolutionary material application not only takes an important step in lightweight design, but also ensures the safety of mechanical strength, greatly improving the operating efficiency and maintenance convenience of the power system. In summary, the application of the bundled carbon fiber composite core conductor structure and titanium alloy supporting hardware of the present invention not only solves the problem of insufficient bending resistance of single-core carbon fiber conductors, but also achieves a comprehensive upgrade of system performance through material innovation, injecting new vitality into the technological progress and sustainable development of the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below; obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is a schematic diagram of the use of a bundled carbon fiber composite core conductor structure in an embodiment of the present utility model;

[0039] Figure 2 Schematic diagram of a bundled carbon fiber composite core conductor in an embodiment of the present invention;

[0040] Figure 3This is a schematic diagram of a titanium alloy connecting fitting in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of a titanium alloy protective fitting in an embodiment of the present invention;

[0042] The explanation of the reference numerals in the figures is as follows:

[0043] 1. Bundled carbon fiber composite core conductor; 1-1. Bundled carbon fiber composite core rod; 1-2. Aluminum alloy stranded wire layer;

[0044] 2. Titanium alloy connecting fittings;

[0045] 3-1, insulator; 3-2, ball head hanging ring; 3-3, first U-shaped hanging ring; 3-4, first extension pull ring; 3-5, right-angle hanging plate; 3-6, second extension pull ring; 3-7, second U-shaped hanging ring;

[0046] 4-1. Titanium alloy wire clamp; 4-2. Sub-conductor spacer rod frame; 4-3. Connecting device. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the technical solutions of the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0048] All other embodiments obtained by persons of ordinary skill in the art based on the technical solutions disclosed in the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0049] See also Figure 1 and Figure 2 In an embodiment of the present invention, a bundled carbon fiber composite core conductor structure is provided, comprising: a bundled carbon fiber composite core conductor 1 and a titanium alloy connecting fitting 2 provided at the connecting end of the bundled carbon fiber composite core conductor 1; wherein,

[0050] The bundled carbon fiber composite core conductor 1 includes a bundled carbon fiber composite core rod 1-1 and an aluminum alloy stranded wire layer 1-2 wrapped around the outside of the bundled carbon fiber composite core rod 1-1; wherein the bundled carbon fiber composite core rod 1-1 is formed by a plurality of carbon fiber single cores being bundled in parallel to form a bundle body and then tied and solidified; in a further exemplary optional solution, aramid yarn is used for braiding and binding, and after the bundle body is tied, aluminum foil is used for bidirectional coating and solidification in both clockwise and counterclockwise directions; specifically, the carbon fiber single core includes a carbon fiber core and a glass fiber coating layer arranged outside the carbon fiber core;

[0051] The titanium alloy connecting fitting 2 is made of titanium alloy material.

[0052] In one embodiment of the present invention, the tensile strength of the bundled carbon fiber composite core rod 1-1 is greater than or equal to 2400 MPa, and the maximum operating temperature of the bundled carbon fiber composite core conductor 1 is greater than or equal to 160°C.

[0053] Explanatory note: In the prior art, during the deployment of the conductor, bending is easily generated during the steps of passing through a tension machine and anchoring with a wire clamp; based on the technical solution disclosed in the embodiment of the utility model, a winding machine with a minimum bending diameter of 25D can be used, where D is the conductor diameter, which is better than the minimum bending diameter of 50D of a carbon fiber single-core conductor with the same diameter, and is 50% lower than the winding diameter of a single-core carbon fiber conductor, thereby avoiding damage to the core rod during construction and reducing the risk of wire breakage caused by construction.

[0054] See also Figure 3 In a specific embodiment of the present invention, the titanium alloy connection fitting 2 includes: an insulator 3-1, a ball head hanging ring 3-2, a first U-shaped hanging ring 3-3, a first extended pull ring 3-4, a right-angle hanging plate 3-5, a second extended pull ring 3-6 and a second U-shaped hanging ring 3-7 connected in sequence;

[0055] Among them, the insulator 3-1 is used to connect to the connection end of the bundled carbon fiber composite core conductor 1, and the second U-shaped hanging ring 3-7 is used to connect to the transmission line tower; the ball head hanging ring 3-2, the first U-shaped hanging ring 3-3, the first extended pull ring 3-4, the right-angle hanging plate 3-5, the second extended pull ring 3-6 and the second U-shaped hanging ring 3-7 are all made of titanium alloy material.

[0056] By way of example, the connection ends of the bundled carbon fiber composite core conductors can be connected to the conductor side of the insulator through suspension clamps, connecting plates, right-angle hanging plates, and bowl head hanging plates. The titanium alloy connecting hardware has the advantages of high strength, light weight, and corrosion resistance, and can be used in scenarios such as heavy icing, heavy corrosion, large spans, and capacity expansion and transformation of transmission lines of all voltage levels.

[0057] In a specific embodiment of the present invention, the bundled carbon fiber composite core conductor structure adopts a split conductor conductor installation method, and titanium alloy protective hardware is provided between each bundled carbon fiber composite core conductor 1 serving as a split conductor sub-conductor; the titanium alloy protective hardware is made of titanium alloy material.

[0058] For example, the titanium alloy protective hardware includes sub-conductor spacers, rotary spacers, etc.; among them, the sub-conductor spacers are used to maintain the distance between the sub-conductors of the split conductor, and the rotary spacers are used to reduce the degree of conductor dancing; at the same time, the high pull-to-weight ratio, low sag and other characteristics of the bundled carbon fiber composite core conductor can be used to further suppress the conductor dancing and breeze vibration.

[0059] See also Figure 4 In a specific exemplary embodiment of the present invention, the titanium alloy protective hardware includes: a titanium alloy wire clamp 4-1, a sub-conductor spacer frame 4-2, and a connecting device 4-3; wherein, the number of the titanium alloy wire clamps 4-1 is multiple, each used to connect to each bundled carbon fiber composite core conductor 1; the titanium alloy wire clamp 4-1 is set on the sub-conductor spacer frame 4-2 through the connecting device 4-3; the titanium alloy wire clamp 4-1 and the sub-conductor spacer frame 4-2 are made of titanium alloy, and the connecting device 4-3 is made of synthetic rubber. In a further exemplary embodiment, a double-swing anti-dance clamp and a rotary wire clamp frame are used, and the double-swing anti-dance clamp is a hot-dip galvanized part.

[0060] In one embodiment of the present invention, the bundled carbon fiber composite core conductor structure further comprises: a titanium alloy limit clamp;

[0061] The titanium alloy limit wire clamp is made of titanium alloy and is used to maintain the clamping state of the bundled carbon fiber composite core conductor 1 during the disassembly and assembly and intermediate connection construction process to ensure the completion of the wire laying operation or the wire tightening operation; explanatoryally, the use of the limit wire clamp to implement the wire laying construction and ensure that the wire is clamped can further avoid wire damage caused by excessive bending angles, and also avoid damage to the core rod due to the minimum bending diameter being less than the minimum bending diameter of the carbon fiber composite core conductor during the wire stringing construction and the formation of invisible defects. Explanatoryally, the limit wire clamp can automatically clamp the wire, making it convenient to disassemble and assemble the intermediate connection tool that connects the wire and the force-bearing terminal. The weight is reduced to 40% of the traditional stainless steel wire clamp, and it has the advantages of reliable clamping, flexible loading and unloading, miniaturization and lightweighting. Its surface adopts the effective coordination of hydrogen-free carburizing heat treatment and mechanical processing process to improve the wear resistance and impact load resistance of the limit wire clamp.

[0062] The steps for using the bundled carbon fiber composite core conductor structure provided by the embodiment of the utility model include:

[0063] Select the carbon fiber composite core conductor model with corresponding current carrying capacity and strength according to the transmission capacity, voltage level and span of the transmission line;

[0064] Select titanium alloy connecting fittings of corresponding size according to the model size, weight, operating conditions, and maximum operating load of the carbon fiber composite core conductor;

[0065] Select the appropriate titanium alloy protective hardware according to the size and splitting pattern of the carbon fiber composite core conductor;

[0066] Combined with the selection of carbon fiber composite core conductors, select construction tools such as lattice-type square poles, limit wire clamps, closed porcelain bottle clamps, etc. that meet the requirements;

[0067] Complete the design and application of carbon fiber composite core conductors, titanium alloy hardware, and construction tools in transmission lines subject to heavy icing, severe corrosion, large spans, and capacity expansion.

[0068] In the technical solution of the embodiment of the present utility model, the supporting application of clustered carbon fiber composite core conductors and titanium alloy hardware realizes the high-strength and lightweight design of the transmission line, greatly improving the transmission capacity and service life of the line. It can be applied to the design and operation of transmission lines in harsh environments and terrains such as heavy icing, strong dancing, heavy corrosion, and large spans.

[0069] In summary, the single-core carbon fiber conductor is a new type of high-temperature resistant and capacity-enhanced overhead conductor. The reinforcing core of the traditional single-core carbon fiber conductor (i.e., carbon fiber composite core rod) is made of high-strength carbon fiber, glass fiber and high-temperature thermosetting resin pultruded composite. The use of carbon fiber composite core rod to replace the steel core of the traditional overhead conductor has technical advantages such as high strength, light weight, corrosion resistance, high temperature resistance, and small sag. However, due to insufficient bending resistance, the single-core carbon fiber conductor has the risk of breakage or potential hidden dangers during the construction phase. Based on the above situation, the present invention specifically proposes a bundled carbon fiber composite core conductor structure, which can greatly improve the bending resistance of the carbon fiber composite core conductor and ensure operational safety. In addition, the existing matching connecting hardware and protective hardware are mostly made of galvanized steel, which has the disadvantages of heavy weight and poor long-term corrosion resistance. The embodiment of the present invention uses titanium alloy material. Titanium alloy has the technical advantages of high strength, light weight and strong corrosion resistance. When used with carbon fiber composite core conductors, it can achieve a 40% weight reduction and a 25% strength increase, ensuring the safety of mechanical strength on the basis of lightweight design.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A bundled carbon fiber composite core conductor structure, characterized in that: include: A bundled carbon fiber composite core conductor (1) and a titanium alloy connecting fitting (2) arranged at the connection end of the bundled carbon fiber composite core conductor (1); wherein: The bundled carbon fiber composite core conductor (1) comprises a bundled carbon fiber composite core rod (1-1) and an aluminum alloy stranded wire layer (1-2) wrapped around the bundled carbon fiber composite core rod (1-1); The bundled carbon fiber composite core rod (1-1) is formed by bundling a plurality of carbon fiber single cores in parallel to form a bundle body, which is then tied and solidified; The titanium alloy connecting fitting (2) is made of titanium alloy material.

2. The bundled carbon fiber composite core conductor structure according to claim 1, characterized in that: In the bundled carbon fiber composite core rod (1-1), a bundle formed by parallel bundling of multiple carbon fiber single cores is braided and bound with aramid yarns, and is bidirectionally coated and solidified in clockwise and counterclockwise directions with aluminum foil.

3. The bundled carbon fiber composite core conductor structure according to claim 1, characterized in that: The tensile strength of the bundled carbon fiber composite core rod (1-1) is greater than or equal to 2400 MPa; The maximum operating temperature of the bundled carbon fiber composite core conductor (1) is greater than or equal to 160°C.

4. The bundled carbon fiber composite core conductor structure according to claim 1, characterized in that: The titanium alloy connection fitting (2) comprises an insulator (3-1), a ball head hanging ring (3-2), a first U-shaped hanging ring (3-3), a first extended pull ring (3-4), a right-angle hanging plate (3-5), a second extended pull ring (3-6) and a second U-shaped hanging ring (3-7) which are connected in sequence; wherein, The insulator (3-1) is used to be connected to the connection end of the bundled carbon fiber composite core conductor (1), and the second U-shaped hanging ring (3-7) is used to be connected to the transmission line tower; the ball head hanging ring (3-2), the first U-shaped hanging ring (3-3), the first extended pull ring (3-4), the right-angle hanging plate (3-5), the second extended pull ring (3-6) and the second U-shaped hanging ring (3-7) are all made of titanium alloy.

5. The bundled carbon fiber composite core conductor structure according to claim 1, characterized in that: Also includes: titanium alloy protective hardware; The bundled carbon fiber composite core conductor structure adopts a split conductor conductor installation method, and the titanium alloy protective hardware is arranged between each bundled carbon fiber composite core conductor (1) as a split conductor sub-conductor; the material of the titanium alloy protective hardware is titanium alloy material.

6. The bundled carbon fiber composite core conductor structure according to claim 5, characterized in that: The titanium alloy protective hardware comprises: a titanium alloy wire clamp (4-1), a sub-conductor spacer rod frame (4-2) and a connecting device (4-3); There are a plurality of titanium alloy wire clamps (4-1), each used for connecting to each bundled carbon fiber composite core wire (1); the titanium alloy wire clamp (4-1) is arranged on the sub-wire spacer rod frame (4-2) via the connecting device (4-3).

7. The bundled carbon fiber composite core conductor structure according to claim 6, characterized in that: The titanium alloy wire clamp (4-1) and the sub-conductor spacer rod frame (4-2) are both made of titanium alloy material; The connecting device (4-3) is made of synthetic rubber.

8. The bundled carbon fiber composite core conductor structure according to claim 6, characterized in that: The titanium alloy wire clamp (4-1) adopts a double-pendulum anti-dance device wire clamp; The sub-conductor spacer rod frame (4-2) adopts a rotary wire clamp frame.

9. The bundled carbon fiber composite core conductor structure according to claim 1, characterized in that: Also includes: titanium alloy limit wire clamp; The titanium alloy limit wire clamp is made of titanium alloy and is used to maintain a clamping state of the bundled carbon fiber composite core conductor (1) during the disassembly and assembly and intermediate connection construction process to ensure that the wire laying operation or the wire tightening operation is completed.

10. The bundled carbon fiber composite core conductor structure according to claim 1, characterized in that: The carbon fiber single core includes a carbon fiber core and a glass fiber coating layer arranged outside the carbon fiber core.

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