Composite cable connection assembly and strain type fitting and installation method

Abstract

The application discloses a composite cable connecting assembly, a strain-type fitting and a mounting method, and belongs to the technical field of composite material products. The composite cable connecting assembly comprises a composite cable core, the composite cable core comprises a composite core rod and aluminum strands covering the composite core rod, a part of the composite core rod is exposed outside the aluminum strands, and the composite cable connecting assembly further comprises at least one tapered portion fixed to the composite core rod exposed outside the aluminum strands, wherein the tapered portion is integrally wrapped and solidified by the same material as the composite core rod, and an accessory is fixed to the composite core rod through fastening cooperation with an outer tapered surface of the tapered portion. The composite cable connecting assembly, the strain-type fitting and the mounting method have better fatigue resistance, high connection stability, light overall weight and the advantage of convenient construction.

Description

Technical Field

[0001] This invention belongs to the technical field of composite material products, and particularly relates to a composite cable connection assembly, a tension-resistant fitting, and an installation method. Background Technology

[0002] Composite materials are materials composed of two or more different substances combined in different ways. They can leverage the advantages of various materials, overcome the shortcomings of single materials, and expand the application range of materials. Composite materials are lightweight, high-strength, easy to process and mold, and have excellent elasticity. Among them, carbon fiber composites have advantages such as light weight, low sag, chemical corrosion resistance, long service life, non-magnetic properties, high temperature resistance, and strong overload capacity. Composite materials are anisotropic materials, with their longitudinal elastic modulus and strength being much greater than their transverse elastic modulus and strength. Under only axial force, composite materials themselves do not have any problems. However, in anchorages, composite materials need to withstand combined forces such as bending, shear, and tension, which can lead to localized damage and premature failure, making anchoring very difficult. Therefore, fully utilizing the performance of composite materials, solving and optimizing the anchoring technology of composite material systems, and overcoming their engineering application bottlenecks have become urgent problems to be solved.

[0003] Currently, composite anchoring materials are mainly gradient materials based on ceramics and epoxy resins. Anchoring mechanisms mainly include: bonded anchors, consisting of a sleeve and bonding medium, which employ a centralized anchoring method, but the individual reinforcing bars influence each other, making it difficult to precisely guide the design of large-tonnage anchors; wedge-type anchors, when used to anchor multiple carbon fiber reinforcing bars, require combination with other anchoring methods and require further research; internal expansion extrusion anchors are suitable for anchoring single strands; mechanical extrusion anchors suffer from abrupt stiffness changes with the composite material substrate, easily causing damage to composite products with weak transverse strength, leading to reduced anchoring efficiency.

[0004] Currently, the connections between composite materials and accessories include mechanical connections, adhesive bonding, and hybrid methods combining both. For areas with lower strength requirements, adhesive bonding is used; in load-bearing structural parts, a hybrid of mechanical connections and adhesive bonding is employed to ensure the connection can withstand sufficient shear and peel forces. However, adhesive bonding performance is greatly affected by the environment, and its peel resistance is poor. Furthermore, for existing large-span composite material products, testing the anchorage strength of accessories is inconvenient.

[0005] Power supply fittings must withstand the severe tests of ice, snow, and storms on long-term operating transmission lines. Strong winds, freezing rain, and icing can easily lead to faults such as conductor de-icing, phase-to-phase short circuits, and conductor collisions with lightning protection wires. Therefore, power supply fittings must possess high mechanical strength and a sufficient safety factor. Existing cable connection components have poor fatigue resistance and insufficient connection stability. Tension-resistant fittings are heavy, especially when used in long-span cables, making construction very inconvenient. Summary of the Invention

[0006] The purpose of this invention is to provide a composite cable connection assembly, tension-resistant fittings, and installation method, which has better fatigue resistance, high connection stability, light overall weight, and convenient construction.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The present invention provides a composite cable connection assembly, comprising a composite cable core, the composite cable core including a composite core rod and aluminum stranded wire covering the composite core rod, a portion of the composite core rod being exposed outside the aluminum stranded wire, and further comprising: at least one tapered portion fixed to the composite core rod exposed outside the aluminum stranded wire, the tapered portion being integrally wrapped and cured from the same material as the composite core rod, and an accessory, the accessory being fixed to the composite core rod by fastening with the outer tapered surface of the tapered portion.

[0009] Preferably, the tapered portion includes at least one first tapered section, and the accessory includes at least one connector, which is fixed to the composite mandrel by fastening with the outer tapered surface of the first tapered section.

[0010] Preferably, the tapered portion further includes at least one second tapered segment, the first tapered segment and the second tapered segment have opposite tapers and there is a gap between the first tapered segment and the second tapered segment, and the accessory further includes at least one auxiliary component, which is fixed to the composite mandrel by fastening with the outer tapered surface of the second tapered segment.

[0011] Preferably, both the first tapered segment and the second tapered segment include a first tapered portion, a second tapered portion, and an extension portion. The first tapered portion and the extension portion are connected by the second tapered portion, and the tapers of the first tapered portion and the second tapered portion are opposite.

[0012] Preferably, the angle between the inclined surface of the first cone and its centerline is 0.1°-15°.

[0013] Preferably, the connector has a first tapered hole that mates with the first tapered portion of the first tapered section, and the taper of the first tapered hole is the same as the taper of the first tapered portion of the first tapered section. The auxiliary component has a second tapered hole that mates with the first tapered portion of the second tapered section, and the taper of the second tapered hole is the same as the taper of the first tapered portion of the second tapered section.

[0014] Preferably, the connector is made of metal, and the composite mandrel is made of carbon fiber composite material or glass fiber composite material.

[0015] The present invention also provides a tension-resistant fitting, comprising a tension tube, a steel anchor, an inner liner, and a composite cable connection assembly as described above. The inner liner is fixedly sleeved on the outside of the aluminum stranded wire, and one end of the inner liner abuts against one end of an accessory or one end of the steel anchor. The accessory is partially or entirely located inside the steel anchor and is partially or entirely threadedly connected to the steel anchor. The tension tube is fixedly sleeved on the outside of the inner liner and the steel anchor, with a portion of the inner liner protruding outside the tension tube and a portion of the steel anchor protruding outside the tension tube.

[0016] Preferably, the accessories include a connector and an auxiliary component. The connector is located entirely inside the steel anchor. One end of the auxiliary component has a limiting platform. One end of the limiting platform abuts against the end of the inner liner tube located inside the tension tube, and the other end of the limiting platform abuts against the end of the steel anchor located inside the tension tube.

[0017] Preferably, the outer wall of the aluminum stranded wire and the outer surface of the inner liner tube are coated with a conductive layer.

[0018] This invention also provides a method for installing tension-resistant fittings, wherein the tension-resistant fittings are the structures described in any of the above-mentioned embodiments, comprising the following steps: S1: stripping the aluminum strands of the composite cable core to expose the composite core rod; S2: inserting an inner liner tube from the exposed end of the composite core rod and fitting it onto the composite cable core; S3: inserting a tension tube from the exposed end of the composite core rod; S4: fitting an accessory onto the composite core rod; S5: wrapping yarn around the composite core rod and solidifying a tapered portion on the composite core rod outside the accessory; S6: pulling the accessory towards the tapered portion to fix the accessory to the tapered portion; S7: tightening the steel anchor so that the accessory is partially or completely located inside the steel anchor; S8: pushing the tension tube towards the steel anchor; S9: inserting the inner liner tube into the tension tube and pressing it tightly; S10: using a crimping tool to crimp the tension tube on the surface according to the marked crimping area, so that the tension tube grips the steel anchor and the composite cable core.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The tapered part is integrally wrapped with yarn and cured from the same material as the composite mandrel. Since the expansion coefficient of the same material is the same, the anchoring point of the composite mandrel has better fatigue resistance.

[0021] 2. The accessory is fastened to the composite material substrate through the tapered part, eliminating the need for the elastic sandwich in the existing technology. Furthermore, both the composite mandrel and the tapered part are made of composite materials, which are lighter and stronger, reducing the overall weight and making construction easier.

[0022] 3. There is no problem of abrupt change in stiffness between the composite mandrel and the accessories. It disperses the stress concentration caused by the compression of the composite mandrel by the accessories, and avoids pinching the composite mandrel with weaker transverse strength. Thus, the high strength of the composite material can be fully utilized, and the anchoring efficiency is high. Furthermore, when the composite mandrel is subjected to tensile force, the self-anchoring performance of the connector is achieved through the synergistic effect of the tapered part and the accessories. The connection stability is high, no glue or additional structure is required, and the product is high in strength, low in cost, and lighter.

[0023] 4. The added auxiliary components solve the problem of inconvenience in anchoring and strength testing of existing large-span composite cable connection components, while avoiding damage to the composite core rod caused by direct action on it, thus improving the strength of the composite core rod and the connection stability with the connector.

[0024] 5. The tapered section can solve the problem of the connector being pulled out during the testing of composite cable connection components.

[0025] 6. Fully utilize the material properties of composite materials to solve problems such as anchoring difficulties, poor stability, and short lifespan in the anchoring technology of composite material systems, resulting in high anchoring efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of existing tension-resistant fittings.

[0027] Figure 2 This is a schematic diagram of the structure of the composite cable connection assembly according to Embodiment 1 of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure of the first tapered segment in Embodiment 1 of the present invention.

[0029] Figure 4 This is a schematic diagram of the connector structure according to Embodiment 1 of the present invention.

[0030] Figure 5 This is a schematic diagram of the structure of the tension-resistant fitting according to Embodiment 1 of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the composite cable connection assembly according to Embodiment 2 of the present invention.

[0032] Figure 7 This is a schematic diagram of the auxiliary component in Embodiment 2 of the present invention.

[0033] Figure 8 This is a schematic diagram of the structure of the tension-resistant fitting in Embodiment 2 of the present invention.

[0034] Figure 9 This is a schematic diagram of the installation of the tension-resistant fittings according to Embodiment 2 of the present invention (installation stage of composite cable connection assembly).

[0035] Figure 10This is a schematic diagram of the installation of the tension-resistant fitting according to Embodiment 2 of the present invention (subsequent installation stage).

[0036] Figure 11 This is a schematic diagram of the structure of the tension-resistant fitting in Embodiment 3 of the present invention.

[0037] Figure 12 This is a schematic diagram of the structure of the tension-resistant fitting in Embodiment 4 of the present invention.

[0038] The labels in the attached diagram are as follows: 1-Composite cable core, 11-Composite core rod, 12-Aluminum stranded wire, 2-Tapered section, 21-First tapered section, 22-Second tapered section, 201-First tapered section, 202-Second tapered section, 203-Extension section, 31-Connector, 32-Auxiliary component, 320-Limiting platform, 4-First tapered hole, 5-Second tapered hole, 6-Tension tube, 7-Steel anchor, 8-Inner liner tube. Detailed Implementation

[0039] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0040] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Existing tension-resistant fittings require an elastic core to be fitted onto the mandrel, and then an inner conical sleeve to be fitted onto the elastic core, such as... Figure 1 As shown.

[0042] Example 1:

[0043] like Figures 2 to 4As shown, the composite cable connection assembly (single-head single-taper) provided in this embodiment includes a composite cable core 1. The composite cable core 1 includes a composite core rod 11 and an aluminum stranded wire 12 covering the composite core rod 11. The left end of the composite core rod 11 is exposed outside the aluminum stranded wire 12. It also includes a tapered part 2 fixed to the composite core rod 11 exposed outside the aluminum stranded wire 12. The tapered part 2 is integrally wrapped with yarn and cured from the same material as the composite core rod 11. Both are carbon fiber composite materials. The same coefficient of thermal expansion of the same material gives the anchoring point of the composite mandrel 11 better fatigue resistance. In this embodiment, the tapered part 2 is a first tapered section 21, and the accessory is a connector 31. The connector 31 is made of metal material, and the outer wall of the connector 31 has external threads that mate with the threads of the steel anchor 7. The connector 31 is fixed to the composite mandrel 11 by fastening with the outer tapered surface of the first tapered section 21, eliminating the need for the elastic sandwich in the prior art. Furthermore, both the composite mandrel 11 and the tapered part 2 are made of composite materials, especially carbon fiber composite materials, which are lighter and stronger, reducing the overall weight and providing the advantage of convenient construction. The material properties of composite materials are fully utilized to solve the problems of anchoring difficulties, poor stability, and short lifespan in the anchoring technology of carbon composite material systems, resulting in high anchoring efficiency. Moreover, the use of composite materials in large-span overhead line products can meet the requirements of power and communication transmission, and the high strength eliminates the magnetic loss and thermal effects caused by steel strand materials, greatly reducing the power loss during power transmission.

[0044] Furthermore, the first tapered section 21 includes a first tapered portion 201, a second tapered portion 202, and an extension portion 203. The first tapered portion 201 and the extension portion 203 are connected by the second tapered portion 202, and the tapers of the first tapered portion 201 and the second tapered portion 202 are opposite. The second tapered portion 202 and the extension portion 203 ensure a smooth transition between the yarn-covered structure and the composite mandrel 11, avoiding stress concentration. The force on the composite mandrel 11 is dispersed axially, improving anchoring stability.

[0045] Furthermore, the angle between the inclined surface of the first cone 201 and its centerline is 1°. The specific angle is selected according to actual production needs to meet different requirements.

[0046] Furthermore, the connector 31 has a first tapered hole 4 in its middle that mates with the first tapered portion 201 of the first tapered section 21. The first tapered hole 4 penetrates the left and right side walls of the connector 31, and the taper of the first tapered hole 4 is the same as the taper of the first tapered portion 201 of the first tapered section 21. This forms a complementary fit, with inclined contact surfaces, eliminating the problem of abrupt changes in stiffness between the composite mandrel 11 and the connector 31. It disperses the stress concentration caused by the connector 31 squeezing the composite mandrel 11, avoiding damage to the composite material with weaker lateral strength. This allows the high strength of the composite material to be fully utilized, resulting in high anchoring efficiency. Moreover, when the composite mandrel 11 is subjected to tensile force, it achieves self-anchoring performance through the synergistic effect of the first tapered section 21 and the connector 31, eliminating the need for adhesive application or additional structures, resulting in lower cost, lighter overall product, and improved market competitiveness.

[0047] like Figure 5 As shown, the present invention also provides a tension-resistant fitting, including a tension tube 6, a steel anchor 7, an inner liner 8, and a composite cable connection assembly as described above. The inner liner 8 is fixedly sleeved on the outside of the aluminum stranded wire 12, and its left end abuts against the right end of the steel anchor 7. The connector 31 is completely located inside the steel anchor 7 and is threadedly connected to the steel anchor 7. The tension tube 6 is fixedly sleeved on the outside of the inner liner 8 and the steel anchor 7. The right end of the inner liner 8 is exposed outside the tension tube 6, and the left end of the steel anchor 7 is exposed outside the tension tube 6.

[0048] Furthermore, the outer wall of the aluminum stranded wire 12 and the outer surface of the inner liner tube 8 are coated with a conductive layer. In this embodiment, the conductive layer is an anti-oxidation conductive paste to ensure effective conductivity.

[0049] This embodiment also provides a method for installing a tension-resistant fitting, wherein the tension-resistant fitting is the structure described in any of the above embodiments, and includes the following steps: S1: Remove the aluminum stranded wire 12 from the left end of the composite cable core 1, so that the composite core rod 11 is exposed; S2: Insert the inner liner tube 8 from the left end of the composite core rod 11 and fit it onto the composite cable core 1; S3: Insert the tension tube 6 from the left end of the composite core rod 11, with the inner liner tube 8 and the tension tube 6 both located on the right side of the exposed portion of the composite core rod 11; S4: Fit the connector 31 onto the composite core rod 11; S5: Wrap yarn around the composite core rod 11 and solidify it into a cone shape on the composite core rod 11 to the left of the connector 31. S6: Pull the connector 31 towards the tapered portion 2 to fix it in place. S7: Tighten the steel anchor 7 so that the connector 31 is completely inside the steel anchor 7. S8: Push the tension tube 6 to the left towards the steel anchor 7. In this embodiment, there is a gasket between the tension tube 6 and the steel anchor 7. The tension tube 6 slides to the left until it is close to the gasket, at which point the gasket is close to the steel anchor 7. S9: Insert the inner liner tube 8 into the tension tube 6 and tighten it until the left end of the inner liner tube 8 abuts against the right end of the steel anchor 7. S10: Use a crimping tool to crimp the tension tube 6 on the marked crimping area so that the tension tube 6 grips the steel anchor 7 and the composite cable core 1. When tightening the connector 31, only a simple tightening action is needed, without the need for other steps such as applying glue, making the anchoring process simple. The tapered portion 2 can solve the problem of the connector 31 being pulled out during the testing of the composite cable connection assembly. Furthermore, during use, under tensile force, the anchorage between connector 31 and the first tapered section 21 becomes increasingly stable, and the self-anchoring effect of the structure improves the stability of the anchorage. The overall weight is lighter and the strength is better, enhancing market competitiveness.

[0050] Example 2:

[0051] like Figures 6 to 7As shown, this embodiment provides a composite cable connection assembly (single-head double-tapered), including a composite cable core 1. The composite cable core 1 includes a composite core rod 11 and an aluminum stranded wire 12 covering the composite core rod 11. The left end of the composite core rod 11 is exposed outside the aluminum stranded wire 12. It also includes a tapered portion 2 fixed to the composite core rod 11 exposed outside the aluminum stranded wire 12. The tapered portion 2 is integrally wrapped with yarn and cured from the same material as the composite core rod 11, both of which are carbon fiber composite materials. The same coefficient of thermal expansion of the same material gives the anchor point of the composite mandrel 11 better fatigue resistance. The tapered part 2 of this embodiment includes a first tapered section 21 and a second tapered section 22. The first tapered section 21 and the second tapered section 22 have opposite tapers and there is a gap between the first tapered section 21 and the second tapered section 22. The accessories are a connector 31 and an auxiliary part 32. Both the connector 31 and the auxiliary part 32 are made of metal. The outer wall of the connector 31 has an external thread that mates with the thread of the steel anchor 7. The outer wall of the auxiliary part 32 is a smooth round surface. The connector 31 is fixed to the composite mandrel 11 by fastening with the outer tapered surface of the first tapered section 21. The auxiliary part 32 mates with the second tapered section 22. The auxiliary component 32 is used to assist in tightening and anchoring the connector 31. During tightening, the force at one end acts on the auxiliary component 32, facilitating the fastening of the connector 31 to the first tapered section 21. This solves the problem of inconvenient anchoring and strength testing in existing large-span composite cable connection assemblies, while avoiding damage to the composite core rod 11 caused by direct force, thus improving the strength of the composite core rod 11 and the connection stability with the connector 31. It eliminates the need for the elastic sandwich in existing technologies, and both the composite core rod 11 and the tapered section 2 are made of composite materials, especially carbon fiber composite materials, which are lighter and stronger, reducing overall weight and offering the advantage of convenient construction. It fully utilizes the material properties of composite materials, solving the problems of difficult anchoring, poor stability, and short lifespan in carbon composite material anchoring technology, resulting in high anchoring efficiency.

[0052] Furthermore, both the first tapered section 21 and the second tapered section 22 include a first tapered portion 201, a second tapered portion 202, and an extension portion 203. The first tapered portion 201 and the extension portion 203 are connected by the second tapered portion 202, and the tapers of the first tapered portion 201 and the second tapered portion 202 are opposite. The second tapered portion 202 and the extension portion 203 ensure a smooth transition between the yarn-covered structure and the composite mandrel 11, avoiding stress concentration. The force on the composite mandrel 11 is dispersed axially, improving anchoring stability.

[0053] Furthermore, the angle between the inclined surface of the first cone 201 and its centerline is 1°. The specific angle is selected according to actual production needs to meet different requirements.

[0054] Furthermore, the connector 31 has a first tapered hole 4 in its middle that mates with the first tapered portion 201 of the first tapered section 21. The first tapered hole 4 penetrates the left and right side walls of the connector 31, and the taper of the first tapered hole 4 is the same as the taper of the first tapered portion 201 of the first tapered section 21. This forms a complementary fit, with inclined contact surfaces, eliminating the problem of abrupt changes in stiffness between the composite mandrel 11 and the connector 31. It disperses the stress concentration caused by the connector 31 squeezing the composite mandrel 11, avoiding damage to the composite material with weaker lateral strength. This allows the high strength of the composite material to be fully utilized, resulting in high anchoring efficiency. Moreover, when the composite mandrel 11 is subjected to tensile force, it achieves self-anchoring performance through the synergistic effect of the first tapered section 21 and the connector 31, eliminating the need for adhesive application or additional structures, resulting in lower cost, lighter overall product, and improved market competitiveness. The auxiliary component 32 has a second conical hole 5 in its middle, which mates with the first conical portion 201 of the second conical section 22. The second conical hole 5 penetrates the left and right side walls of the auxiliary component 32. The taper of the second conical hole 5 is the same as the taper of the first conical portion 201 of the second conical section 22, forming a complementary fit. The contact surface is inclined, eliminating the problem of abrupt changes in stiffness between the composite core rod 11 and the auxiliary component 32. This disperses the stress concentration caused by the compression of the composite core rod 11 by the auxiliary component 32, avoiding damage to the composite core rod 11, which has weaker lateral strength. Thus, the high strength of the composite material can be fully utilized, serving as an auxiliary connector 31 for anchoring. By wrapping the composite core rod 11 with yarn at a certain distance from the first conical section 21 and curing it into the second conical section 22, which mates with the auxiliary component 32 with complementary tapers, the problem of inconvenience in anchoring process and strength testing of connector 31 (anchoring end) caused by the excessive length of the composite cable core 1 is effectively solved. The stress distribution of the anchoring system of this invention is more reasonable, and the stress distribution along the axial direction in the anchoring area is more uniform.

[0055] like Figure 8 As shown, the present invention also provides a tension-resistant fitting, including a tension tube 6, a steel anchor 7, an inner liner 8, and a composite cable connection assembly as described above. The inner liner 8 is fixedly sleeved on the outside of the aluminum stranded wire 12, and its left end abuts against the right end of the auxiliary component 32. The connector 31 is completely located inside the steel anchor 7. The right end of the auxiliary component 32 has a limiting platform 320, which is located outside the steel anchor 7. The other parts of the auxiliary component 32 are located inside the steel anchor 7. The right end of the limiting platform 320 abuts against the left end of the inner liner 8 and the left end of the limiting platform 320 abuts against the right end of the steel anchor 7. The connector 31 is threadedly connected to the steel anchor 7. The tension tube 6 is fixedly sleeved on the outside of the inner liner 8 and the steel anchor 7. The right end of the inner liner 8 is exposed outside the tension tube 6, and the left end of the steel anchor 7 is exposed outside the tension tube 6.

[0056] Furthermore, the outer wall of the aluminum stranded wire 12 and the outer surface of the inner liner tube 8 are coated with a conductive layer. In this embodiment, the conductive layer is an anti-oxidation conductive paste to ensure effective conductivity.

[0057] like Figures 9 to 10 As shown, this embodiment also provides a method for installing tension-resistant fittings, wherein the tension-resistant fittings are the structures described in any of the above-mentioned embodiments, including the following steps: S1: stripping the aluminum stranded wire 12 from the left end of the composite cable core 1, so that the composite core rod 11 is exposed; S2: inserting the inner liner tube 8 from the left end of the composite core rod 11 and fitting it onto the composite cable core 1; S3: inserting the tension tube 6 from the left end of the composite core rod 11, wherein both the inner liner tube 8 and the tension tube 6 are located on the right side of the exposed portion of the composite core rod 11 at this time. S4: Fit connector 31 and auxiliary component 32 onto composite mandrel 11. S5: Wrap yarn around composite mandrel 11, and solidify a first tapered segment 21 on the left side of composite mandrel 11, then grind it to the designed dimensions. Next, solidify a second tapered segment 22 on the right side of composite mandrel 11, and grind it to the designed dimensions. Connector 31 and auxiliary component 32 are then connected via the first tapered segment 21 and the second tapered segment 22. S6: Simultaneously clamp the connecting piece 31 and the auxiliary piece 32, and pull the connecting piece 31 and the auxiliary piece 32 in opposite directions respectively, so that the connecting piece 31 is pulled towards the first tapered section 21 and fixed to the first tapered section 21, and the auxiliary piece 32 is pulled towards the second tapered section 22 and fixed to the second tapered section 22. S7: Tighten the steel anchor 7 until the right end of the steel anchor 7 abuts against the left end of the limiting platform 320. At this time, the connecting piece 31... All components are located within the steel anchor 7. S7: Push the tension tube 6 to the left towards the steel anchor 7. In this embodiment, a gasket is provided between the tension tube 6 and the steel anchor 7. The tension tube 6 slides to the left until it is close to the gasket, at which point the gasket is close to the steel anchor 7. S8: Insert the inner liner tube 8 into the tension tube 6 and tighten it until the left end of the inner liner tube 8 abuts against the right end of the steel anchor 7. S9: Use a crimping tool to crimp the tension tube 6 on the marked crimping area, so that the tension tube 6 grips the steel anchor 7 and the composite cable core 1. When fastening the connector 31, only a simple tightening action is needed; no other steps such as applying adhesive are required, simplifying the anchoring process. The tapered section 2 solves the problem of the connector 31 being pulled out during composite cable connection assembly testing. Specifically, the design of the second tapered section 22 and the auxiliary component 32 solves the problem of inconvenient anchoring and strength testing of existing large-span composite cable connection assemblies. Furthermore, during use, under tensile force, the anchorage between connector 31 and the first tapered section 21 becomes increasingly stable, and the self-anchoring effect of the structure improves the stability of the anchorage. The overall weight is lighter and the strength is better, enhancing market competitiveness.

[0058] Example 3:

[0059] like Figure 11 As shown, the difference between this embodiment and Embodiment 1 is that both ends of the composite core rod 11 are exposed outside the aluminum stranded wire 12 (double-headed single taper).

[0060] Example 4:

[0061] like Figure 12 As shown, the difference between this embodiment and embodiment two is that both ends of the composite core rod 11 are exposed outside the aluminum stranded wire 12 (double-headed double taper).

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite cable connection assembly, comprising a composite cable core, the composite cable core including a composite core rod and aluminum stranded wires covering the composite core rod, a portion of the composite core rod being exposed outside the aluminum stranded wires, characterized in that, Also includes: At least one tapered portion of a composite core rod fixed to the outside of the aluminum stranded wire, the tapered portion being integrally wrapped with yarn and cured from the same material as the composite core rod; The accessory is fixed to the composite mandrel by fastening it to the outer conical surface of the tapered portion; The tapered portion includes at least one first tapered segment; The accessory includes at least one connector; The connector is fixed to the composite mandrel by fastening it to the outer conical surface of the first tapered section. The tapered portion further includes at least one second tapered segment, wherein the first tapered segment and the second tapered segment have opposite tapers and there is a gap between the first tapered segment and the second tapered segment; The accessory also includes at least one auxiliary component; The auxiliary component is fixed to the composite mandrel by fastening it to the outer conical surface of the second tapered section; Both the first tapered segment and the second tapered segment include a first tapered portion, a second tapered portion, and an extension portion; The first cone portion and the extension portion are connected by the second cone portion; The tapers of the first and second cones are opposite. The larger end of the first cone is connected to the larger end of the second cone, and the smaller end of the second cone is connected to the extension. Along the length of the composite mandrel, the ends of the first tapered segment and the second tapered segment that are close to each other are the ends of their respective first tapered portions with smaller dimensions.

2. The composite cable connection assembly according to claim 1, characterized in that, The angle between the inclined surface of the first cone and its centerline is 0.1°-15°.

3. The composite cable connection assembly according to claim 1, characterized in that, The connector has a first tapered hole that mates with the first tapered portion of the first tapered segment, and the taper of the first tapered hole is the same as the taper of the first tapered portion of the first tapered segment. The auxiliary component has a second tapered hole that mates with the first tapered portion of the second tapered segment, and the taper of the second tapered hole is the same as the taper of the first tapered portion of the second tapered segment.

4. The composite cable connection assembly according to claim 1, characterized in that, The connector is made of metal. The composite mandrel is made of carbon fiber composite material or glass fiber composite material.

5. A tension-resistant fitting, characterized in that, Includes tension pipes, steel anchors, inner lining pipes, and composite cable connection assemblies as described in any one of claims 1-4; The inner lining tube is fixedly sleeved on the outside of the aluminum stranded wire, and one end of it abuts against one end of the accessory or one end of the steel anchor. The accessory is located partially or entirely inside the steel anchor and is partially or entirely threadedly connected to the steel anchor; The tension tube is fixedly sleeved outside the inner liner and the steel anchor, with a portion of the inner liner and a portion of the steel anchor exposed outside the tension tube.

6. The tension-resistant fitting according to claim 5, characterized in that, The accessories include connectors and auxiliary components; The connector is located entirely inside the steel anchor; One end of the auxiliary component has a limiting platform, one end of which abuts against the end of the inner liner tube located inside the tension tube, and the other end of the limiting platform abuts against the end of the steel anchor located inside the tension tube.

7. The tension-resistant fitting according to claim 5, characterized in that, The outer wall of the aluminum stranded wire and the outer surface of the inner liner tube are both coated with a conductive layer.

8. A method for installing tension-resistant fittings, characterized in that, Tension-resistant fittings are the tension-resistant fittings as described in any one of claims 5-7, comprising the following steps: S1: Remove the aluminum strands from the composite cable core to expose the composite core rod; S2: Take the inner liner tube, strip the end of the composite core rod, and insert it onto the composite cable core; S3: Insert the composite mandrel end of the tension tube after it has been peeled off; S4: Place the accessory onto the composite mandrel; S5: Wrap yarn around the composite mandrel and solidify the tapered part on the composite mandrel outside the accessory; S6: Pull the attachment toward the tapered part to tighten it, so that the attachment is fixed to the tapered part; S7: Tighten the steel anchor so that the accessories are partially or completely inside the steel anchor; S7: Push the tension pipe toward the steel anchor; S8: Insert the inner lining tube into the tension tube and tighten it; S9: Use a crimping tool to crimp the tension pipe on the marked crimping area so that the tension pipe grips the steel anchor and the composite cable core tightly.

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