Steel-cored aluminum alloy damping conductor

Abstract

The application relates to the technical field of aluminum alloy conductor wires, and discloses a steel-cored aluminum alloy vibration-damping conductor wire which comprises a steel core and aluminum wires twisted on the outer layer of the steel core, and further comprises a cross-linked polyethylene sheath, a detachable protective sleeve, a mounting ring, a damping rod, a reset member and a connecting piece. The cross-linked polyethylene sheath is wrapped outside the aluminum wires, the detachable protective sleeve is detachably arranged outside the cross-linked polyethylene sheath, the mounting ring is detachably arranged outside the detachable protective sleeve, the end of the damping rod is fixedly connected with a mounting bolt, mounting screw holes matched with the mounting bolt and damping holes through which the damping rod passes are formed in the mounting ring, a plurality of damping rings are fixedly sleeved outside the damping rod, the reset member is arranged on the damping rod, and the connecting piece is used for connecting two adjacent groups of mounting rings. Through the technical scheme, the problem that the existing vibration-damping device and the conductor wire continuously rub against each other, thereby being prone to wear, reducing the service life of the conductor wire and increasing the maintenance cost of the vibration-damping device is solved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy conductor technology, specifically to a steel-cored aluminum alloy vibration-damping conductor. Background Technology

[0002] Steel-cored aluminum alloy conductors are overhead transmission conductors consisting of a steel core and an outer layer of stranded aluminum wire. They are a type of power transmission material. The steel core provides mechanical strength, while the aluminum layer conducts electricity. Utilizing the lightweight and high conductivity of aluminum combined with the tensile strength of steel achieves optimized performance. As carriers of electrical power, conductors are exposed to the elements for extended periods, enduring the continuous effects of natural conditions such as wind, rain, snow, and lightning. Among these, wind-induced conductor vibration is one of the most common and damaging factors. Based on frequency and amplitude, wind-induced conductor vibration can be broadly categorized into three types: high-frequency, low-amplitude wind-induced vibration; medium-frequency, medium-amplitude sub-span vibration; and low-frequency, high-amplitude galloping. Wind-induced vibration is the most frequent and has the longest duration. Although the amplitude of a single vibration is small, its long-term accumulation can lead to conductor fatigue, strand breakage, and even wire breakage, causing asymmetrical operation of the transmission circuit and seriously threatening the safe and stable operation of the power system.

[0003] Traditional vibration damping measures mainly involve installing external devices such as vibration dampers, damping wires, or protective wires on the conductors. The vibration energy is consumed by the inertial mass swing of the vibration dampers or the bending deformation of the damping wires. However, under long-term high-frequency micro-wind vibration, the friction contact surface between the vibration damping device and the conductor will continuously wear down, the friction coefficient will gradually decrease, and the normal pressure may also decrease due to wear. This leads to a significant decline in the vibration damping performance of the damper over time. Replacing worn parts requires power outages, resulting in high maintenance costs, reduced conductor lifespan, and safety hazards. Summary of the Invention

[0004] This invention proposes a steel-cored aluminum alloy vibration-damping conductor to solve the problems in the prior art where continuous friction between the vibration damping device and the conductor easily causes wear, reduces the service life of the conductor, and results in high maintenance costs for the vibration damping device.

[0005] The technical solution of the present invention is as follows: A steel-cored aluminum alloy vibration-damping conductor includes a steel core and an aluminum wire stranded around the outer layer of the steel core, and further includes: A cross-linked polyethylene sheath, which wraps around the outside of the aluminum wire; A detachable protective sleeve is provided, wherein multiple detachable protective sleeves are provided, and the detachable protective sleeves are detachably disposed on the outside of the cross-linked polyethylene sheath, and the multiple detachable protective sleeves are arranged in sequence in contact with each other; The mounting rings are provided in multiples, and the multiple mounting rings are arranged in pairs. The mounting rings are detachably disposed on the outside of the detachable protective sleeve. A vibration damping rod is provided, with a mounting bolt fixedly connected to its end. The mounting ring has mounting screw holes that match the mounting bolts and damping holes through which the vibration damping rod passes. The mounting screw holes and the damping holes are staggered. Multiple damping rings are fixedly fitted on the outside of the vibration damping rod, and the damping rings are in close contact with the inner wall of the damping holes. A reset member, disposed on the vibration damping rod, is used to reset itself after relative movement occurs between the vibration damping rod and the mounting ring. The reset member includes: A fixed baffle is fixedly installed at the end of the vibration damping rod; A detachable baffle is detachably mounted on the vibration damping rod, and the detachable baffle and the fixed baffle are located on opposite sides of the mounting ring; A return spring is provided between the mounting ring and the fixed baffle, and between the mounting ring and the removable baffle. A connector, used to connect two adjacent sets of the mounting rings, the connector comprising: The connecting plate has a connecting groove that matches the connecting plate at one end of each of the two mounting rings in the same group that are close to each other. The connecting plate is slidably installed inside the connecting groove. A locking rod is slidably mounted on the mounting ring, and a locking groove matching the locking rod is provided on the connecting plate; A pull plate is fixedly connected to the end of the clamping rod, and a compression spring is provided between the pull plate and the mounting ring.

[0006] To achieve the detachable design of the removable protective sleeve, the removable protective sleeve includes two half-protective sleeves, which are detachably connected by fastening bolts. The two half-protective sleeves can be spliced ​​together to form an annular sleeve structure that fits tightly against the outer surface of the cross-linked polyethylene sheath.

[0007] To enable the detachable mounting ring, the mounting ring includes two mounting half-rings. Each mounting half-ring has a fixed insert plate at one end and a slot that matches the insert plate at the other end. The insert plate is detachably mounted inside the slot by connecting bolts.

[0008] To enable the detachable baffle, the detachable baffle includes two detachable half-baffles, which are detachably connected by detachable bolts. The detachable half-baffles are provided with mounting grooves that match the vibration damping rod.

[0009] To improve the stability of the detachable baffle, a limit rod is fixedly connected to the inner side of one of the detachable half-baffles, and a limit groove matching the limit rod is opened on the other detachable half-baffle and the vibration damping rod.

[0010] To reduce wear between the mounting ring and the removable protective sleeve, a buffer pad is provided on the inner side of the mounting ring, and the buffer pad contacts the outer side of the removable protective sleeve.

[0011] The working principle and beneficial effects of this invention are as follows: 1. In this invention, the damping ring outside the damping rod is tightly fitted to the inner wall of the damping hole. When the conductor experiences a slight wind vibration, the friction damping between the damping ring and the damping hole can quickly consume the vibration energy. Combined with the bidirectional restoring force of the return spring, it continuously offsets the vibration displacement, suppresses high-frequency wind vibration from the source, reduces the problem of conductor fatigue and strand breakage due to long-term vibration, and ensures the safe operation of the transmission line.

[0012] 2. In this invention, the cross-linked polyethylene sheath directly wraps the aluminum wire, achieving insulation and basic protection for the conductor body. The detachable protective sleeve isolates the mounting ring from the cross-linked polyethylene sheath, and a buffer pad is added to the inner side of the mounting ring. This triple protection structure effectively reduces direct friction between the vibration damping device and the conductor body, solving the problem of wear and tear on the conductor and reduced conductor life caused by long-term use of the vibration damping device in the prior art.

[0013] 3. In this invention, the detachable protective sleeve, mounting ring, and detachable baffle all adopt a split bolt connection structure. The damaged vibration damping components can be disassembled and replaced separately without disassembling the conductor body or shutting down the line. The modular splicing method is suitable for transmission lines with different spans and distances, making operation and maintenance convenient and efficient, and solving the problems of high maintenance difficulty and high cost of vibration damping devices in the prior art. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the vibration damping rod, mounting ring, resetting component, and connecting component of the present invention; Figure 3 This is a schematic diagram of the structure of the vibration damping rod, mounting ring, and resetting component of the present invention; Figure 4 This is an exploded structural diagram of the vibration damping rod, mounting ring, and reset component of the present invention; Figure 5 This is a schematic diagram of the structure of the vibration damping rod, mounting bolt, damping ring, and reset component of the present invention; Figure 6 A schematic diagram of the structure of the present invention, showing the installation of the semi-ring, the locking rod, the pull plate, and the compression spring; Figure 7 This is a schematic diagram of the detachable protective sleeve of the present invention; Figure 8 For the present invention Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0016] In the picture: 1. Steel core; 2. Aluminum wire; 3. Cross-linked polyethylene sheath; 4. Vibration damping bar; 5. Mounting bolts; 6. Damping ring; 101. Semi-protective cover; 201. Install the semi-ring; 202. Insert plate; 203. Buffer pad; 301. Fixed baffle; 302. Return spring; 303. Removable half baffle; 304. Limiting rod; 401. Connecting plate; 402. Clamping rod; 403. Pulling plate; 404. Compression spring. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 2 As shown, this embodiment proposes a steel-core aluminum alloy vibration-damping conductor, including a steel core 1 and an aluminum wire 2 stranded on the outer layer of the steel core 1, as well as a cross-linked polyethylene sheath 3, a removable protective sleeve, a mounting ring, a vibration-damping rod 4, a reset component, and a connector.

[0019] A cross-linked polyethylene sheath 3 is wrapped around the aluminum wire 2. The cross-linked polyethylene sheath 3 is a modified cross-linked polyethylene material, comprising the following raw materials by weight: 50-65 parts silane-cross-linked polyethylene, 8-12 parts polyvinylidene fluoride, 3-5 parts maleic anhydride graft copolymer, 1-2 parts modified graphene, 1-2 parts modified tungsten trioxide, 1-2 parts antioxidant, and 0.5-1 part cross-linking agent. After the above modification, the wear resistance of the cross-linked polyethylene sheath 3 is significantly improved, effectively resisting damage caused by the removable protective sleeve during construction and long-term use. The improved compatibility between polyvinylidene fluoride and polyethylene gives the sheath material both high wear resistance and good flexibility. Modified graphene and modified tungsten trioxide work synergistically to enhance the thermal conductivity and heat dissipation performance and electrochemical corrosion resistance of the sheath, making it suitable for overhead transmission lines with severe mechanical wear or strong environmental corrosion. At the same time, the cross-linked polyethylene sheath 3 avoids the exposure of the conductor and further resists wind, rain and snow erosion, making it suitable for outdoor open-air power transmission scenarios. It has both protection and vibration reduction functions. Furthermore, due to the cross-linked polyethylene sheath 3, there is no need to disconnect the power or disassemble the conductor body when replacing vibration reduction components.

[0020] Multiple removable protective sleeves are provided. These removable protective sleeves are detachably mounted on the outside of the cross-linked polyethylene sheath 3. The multiple removable protective sleeves are arranged sequentially in contact with each other, such as... Figure 1 and Figure 7 As shown, the detachable protective sleeve includes two half-protective sleeves 101, which are detachably connected by fastening bolts. The two half-protective sleeves 101 can be spliced ​​together to form an annular sleeve structure that fits tightly against the outer surface of the cross-linked polyethylene sheath 3. The detachable protective sleeve is used to protect the internal wire structure and provide an installation base for the mounting ring, preventing wear on the cross-linked polyethylene sheath 3 when the wire drives the mounting ring to move. Multiple detachable protective sleeves are spliced ​​together to form an integral sleeve structure that matches the wire, providing complete protection for the wire and reducing stress concentration points. When wear occurs between the mounting ring and the detachable protective sleeve, the detachable protective sleeve can be modularly disassembled and reassembled by fastening bolts, saving replacement costs.

[0021] Multiple mounting rings are provided, arranged in pairs. The mounting rings are detachably mounted on the outside of the removable protective sleeve. Figures 1 to 4 As shown, the mounting ring includes two mounting half-rings 201. An insert plate 202 is fixedly mounted at one end of each mounting half-ring 201. The other end of each mounting half-ring 201 has a slot that matches the insert plate 202. The insert plate 202 is detachably mounted inside the slot via connecting bolts. To reduce wear between the mounting ring and the removable protective sleeve, a buffer pad 203 is provided on the inner side of the mounting ring. The buffer pad 203 contacts the outer side of the removable protective sleeve. The mounting half-rings 201 have identical structures and can be mass-produced. The two mounting half-rings 201 can be joined together to form a complete ring structure that wraps around the removable protective sleeve, thus reducing wear. The vibrating rod 4 provides the installation position and stable support, while the insert plate 202 limits the installation half ring 201 to ensure the stability of the connection of the installation half ring 201. The buffer pad 203 can be made of flexible polymer materials such as rubber, which reduces wear between the installation ring and the detachable protective sleeve and can absorb some vibration impact, improving overall durability. The buffer pad 203 is fixed to the inside of the installation ring by means of adhesive or other methods. When the buffer pad 203 wears out, the installation half ring 201 can be disassembled by connecting bolts, and the installation half ring 201 or the buffer pad 203 can be replaced, saving replacement costs.

[0022] The end of the vibration damping rod 4 is fixedly connected to a mounting bolt 5. The mounting ring has mounting screw holes that match the mounting bolt 5 and damping holes through which the vibration damping rod 4 passes. The mounting screw holes and damping holes are staggered. Multiple damping rings 6 are fixedly fitted on the outside of the vibration damping rod 4. The damping rings 6 are in close contact with the inner wall of the damping holes. The vibration damping rod 4 can be mounted on one mounting ring by the mounting bolt 5. The vibration damping rod 4 passes through the damping hole of another mounting ring. The vibration energy can be consumed by the friction between the damping ring 6 and the inner wall of the damping hole, thereby reducing the vibration amplitude and accumulation time of the conductor and reducing the damage to the conductor. The staggered arrangement of the vibration damping rods 4 connected to the two mounting rings can improve the uniformity of vibration suppression in different directions. The mounting bolt 5 allows for convenient disassembly and assembly of the vibration damping rod 4, and the damping rings 6 can be quickly replaced. When the damping rings 6 are worn, they can be replaced individually, reducing maintenance difficulty and cost.

[0023] A reset component is mounted on the damping rod 4 to reset it after relative movement occurs between the damping rod 4 and the mounting ring. Figures 3 to 5 As shown, the reset component includes a fixed baffle 301, a detachable baffle, and a reset spring 302. The fixed baffle 301 is fixedly mounted on the end of the damping rod 4, and the detachable baffle is detachably mounted on the damping rod 4. Figure 5 As shown, the detachable baffle includes two detachable half-baffles 303, which are detachably connected by disassembly bolts. Each detachable half-baffle 303 has a mounting groove that matches the damping rod 4. A limit rod 304 is fixedly connected to the inner side of one of the detachable half-baffles 303, and both the other detachable half-baffle 303 and the damping rod 4 have limit grooves that match the limit rod 304. The detachable baffle and the fixed baffle 301 are located on opposite sides of the mounting ring. A return spring 302 is positioned between the mounting ring and the fixed baffle 301, and between the mounting ring and the detachable baffle. The detachable baffle can be easily disassembled and assembled using the disassembly bolts. After the damping rod 4 passes through the damping hole and is installed inside the mounting bolt hole, the limit rod 304 is passed through the limit groove to install the detachable baffle outside the damping rod 4, thus resetting the baffle. Spring 302 is pre-fitted onto the outside of the damping rod 4, so that the two return springs 302 are located on both sides of the damping hole. The return springs 302 are blocked and limited by the fixed baffle 301 and the detachable baffle respectively. The limiting rod 304 can ensure the stability of the detachable baffle. After installation, the return spring 302 is in a naturally extended state, realizing bidirectional elastic reset. When the mounting ring is displaced by the vibration of the conductor, the return spring 302, which is away from the moving direction of the damping rod 4, is compressed. After the vibration weakens, the return spring 302 can push the mounting ring and the damping rod 4 back to their original positions, while playing a damping buffer and anti-loosening role. When it is necessary to disassemble the damping rod 4, first remove the detachable baffle from the damping rod 4, and then unscrew the mounting bolt 5 from the inside of the mounting screw hole to pull the damping rod 4 out of the damping hole.

[0024] The connector is used to connect two adjacent sets of mounting rings, such as... Figure 2 , Figure 6 and Figure 8 As shown, the connector includes a connecting plate 401, a locking rod 402, and a pull plate 403. Two mounting rings in the same group have connecting grooves at their closest points that match the connecting plate 401. The connecting plate 401 is slidably mounted inside the connecting grooves. The locking rod 402 is slidably mounted on the mounting rings. The connecting plate 401 has a locking groove that matches the locking rod 402. The pull plate 403 is fixedly connected to the end of the locking rod 402. A compression spring 404 is provided between the pull plate 403 and the mounting rings. When the connecting plate 401 is slid into the connecting grooves of two adjacent sets of mounting rings, the compression spring... 404 pushes the clamping rod 402 to automatically engage in the slot of the connecting plate 401, completing the rigid connection of adjacent mounting ring groups, ensuring that multiple sets of vibration damping structures are subjected to force synchronously and work together. When maintenance of the vibration damping structure is required, the relevant parts can be directly disassembled. Pulling the pull plate 403 to pull the clamping rod 402 out of the slot can release the limit on the connecting plate 401, thereby allowing the connecting plate 401 to be disassembled from the connecting groove. Unscrewing the mounting bolt 5 from the mounting screw hole can disconnect the vibration damping rod 4 and the mounting ring. The mounting ring can be disassembled by loosening the connecting bolt.

[0025] The working principle or usage process of this steel-cored aluminum alloy vibration damping conductor is as follows: First, install the removable protective sleeves on the outside of the cross-linked polyethylene sheath 3, arranging them in sequence. Then, install the mounting rings on the outside of the removable protective sleeves, forming a group of two. Next, pass the damping rod 4 through the damping hole of one of the mounting rings, and fit two return springs 302 on the damping rod 4. The two return springs 302 are located on both sides of the mounting ring through which the rod passes. Thread the damping rod 4 onto the other mounting ring. Then, install the removable baffle. The fixed baffle 301 and the removable baffle limit the return springs 302. Connect the adjacent groups of mounting rings to form a whole through the connector. When the conductor is subjected to wind-induced vibration, relative displacement occurs between the mounting rings, causing the damping rod 4 to slide within the damping hole. The damping ring 6 rubs against the inner wall of the damping hole to consume vibration energy. The return spring 302 blocks the displacement of the damping rod 4 and resets the damping rod 4 after the vibration ends, maintaining system stability. Throughout the vibration reduction process, the vibration reduction component does not directly contact the conductor body, avoiding wear on the conductor caused by traditional vibration reduction devices. When maintenance or replacement is required, partial replacement can be achieved by disassembling fastening bolts, connecting bolts, and disassembling bolts, which is convenient and has low maintenance costs.

[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel-core aluminum alloy vibration-damping conductor, comprising a steel core (1) and an aluminum wire (2) stranded on the outer layer of the steel core (1), characterized in that, Also includes: A cross-linked polyethylene sheath (3) is wrapped around the outside of the aluminum wire (2); A detachable protective sleeve is provided, wherein multiple detachable protective sleeves are provided, and the detachable protective sleeves are detachably disposed on the outside of the cross-linked polyethylene sheath (3), and the multiple detachable protective sleeves are arranged in sequence in contact with each other. The mounting rings are provided in multiples, and the multiple mounting rings are arranged in pairs. The mounting rings are detachably disposed on the outside of the detachable protective sleeve. A damping rod (4) is fixedly connected to an installation bolt (5) at its end. The installation ring has an installation screw hole that matches the installation bolt (5) and a damping hole through which the damping rod (4) passes. The installation screw hole and the damping hole are staggered. Multiple damping rings (6) are fixedly fitted on the outside of the damping rod (4). The damping ring (6) and the inner wall of the damping hole are tightly fitted. A reset component is disposed on the damping rod (4) and is used to reset the damping rod (4) after relative movement occurs between the damping rod (4) and the mounting ring; A connector for connecting two adjacent sets of the mounting rings.

2. The steel-cored aluminum alloy vibration-damping conductor according to claim 1, characterized in that, The reset component includes: A fixed baffle (301) is fixedly disposed at the end of the damping rod (4); A detachable baffle is detachably mounted on the damping rod (4), and the detachable baffle and the fixed baffle (301) are located on both sides of the mounting ring; A reset spring (302) is disposed between the mounting ring and the fixed baffle (301) and between the mounting ring and the removable baffle.

3. The steel-cored aluminum alloy vibration-damping conductor according to claim 1, characterized in that, The connector includes: The connecting plate (401) has a connecting groove that matches the connecting plate (401) at one end of each of the two mounting rings in the same group that are close to each other. The connecting plate (401) is slidably installed inside the connecting groove. A locking rod (402) is slidably disposed on the mounting ring, and a locking groove matching the locking rod (402) is provided on the connecting plate (401); A pull plate (403) is fixedly connected to the end of the clamping rod (402), and a compression spring (404) is provided between the pull plate (403) and the mounting ring.

4. The steel-cored aluminum alloy vibration-damping conductor according to claim 1, characterized in that, The detachable protective sleeve includes two half-protective sleeves (101), which are detachably connected by fastening bolts. The two half-protective sleeves (101) can be spliced ​​together to form an annular sleeve structure that is tightly attached to the outer surface of the cross-linked polyethylene sheath (3).

5. The steel-cored aluminum alloy vibration-damping conductor according to claim 1, characterized in that, The mounting ring includes two mounting half-rings (201), with a plug plate (202) fixedly provided at one end of each mounting half-ring (201). The other end of each mounting half-ring (201) has a slot that matches the plug plate (202). The plug plate (202) is detachably installed inside the slot by means of connecting bolts.

6. The steel-cored aluminum alloy vibration-damping conductor according to claim 2, characterized in that, The detachable baffle includes two detachable half-baffles (303), which are detachably connected by detachable bolts. The detachable half-baffles (303) are provided with mounting grooves that match the vibration damping rod (4).

7. The steel-cored aluminum alloy vibration-damping conductor according to claim 6, characterized in that, One of the detachable half-baffles (303) has a fixed connection to a limiting rod (304) on its inner side, and the other detachable half-baffle (303) and the vibration damping rod (4) are provided with limiting grooves that match the limiting rod (304).

8. The steel-cored aluminum alloy vibration-damping conductor according to claim 5, characterized in that, A buffer pad (203) is provided on the inner side of the mounting ring, and the buffer pad (203) is in contact with the outer side of the removable protective sleeve.

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