An overhead conductor combined insulation anti-hopping device

Abstract

The application discloses an overhead conductor combined insulation anti-dancing device, which comprises a plurality of split insulation anti-dancing units, each of which comprises an insulation sheath and a spoiler section. The two ends of the insulation sheath are respectively fixedly connected with a male connector and a female connector. The spoiler section is fixedly connected to the insulation sheath and the female connector. The male connector is insertedly connected with the female connector of the adjacent split insulation anti-dancing unit, and the female connector is insertedly connected with the male connector of the adjacent split insulation anti-dancing unit. The insulation sheath, the male connector and the female connector are all provided with hollow cavities for accommodating overhead conductors. The plurality of spoiler sections are respectively directed to different directions. In the application, the aerodynamic forces borne by different split insulation anti-dancing devices are different, the aerodynamic characteristics of the overall conductor are changed, the conductor dancing is effectively prevented and relieved, and the safe operation of the traction power supply system is ensured.

Description

Technical Field

[0001] This invention relates to the field of high-voltage overhead lines, and in particular to a combined insulation and anti-galling device for overhead conductors. Background Technology

[0002] Overhead conductors are widely used in power transmission lines and electrified railway power supply systems, serving as crucial infrastructure for long-distance power transmission and traction power supply. Power grid overhead conductors are typically laid between high-altitude towers, with large spans and high conductor flexibility; electrified railway overhead conductors (such as contact wire conductors) are laid along the railway line, characterized by complex operating environments and high requirements for power supply continuity and safety.

[0003] Under meteorological conditions such as icing and wind, overhead conductors are prone to wind-induced vibration, especially after icing when they are affected by lateral winds, which can cause large-amplitude, low-frequency periodic galloping. Conductor galloping not only leads to collisions and wear between conductors and between conductors and fittings, but can also cause phase-to-phase short circuits, fatigue damage to fittings, and abnormal stress on towers. In electrified railway systems, conductor galloping can endanger train operation safety, resulting in serious operational risks and economic losses.

[0004] Existing aerodynamic anti-galling measures mainly include anti-galling devices (anti-galling whips), but in practical applications, they still suffer from problems such as insufficient adaptability, simple installation structure, limited anti-galling effect, or difficulty in meeting different working conditions. For example, in strong winds, existing anti-galling devices are prone to loosening. When the wire spacing is small, discharge phenomena are likely to occur.

[0005] Therefore, it is necessary to provide a combined insulating anti-galloping device with a reasonable structure, strong applicability, and the ability to effectively suppress the galloping of overhead conductors, so as to meet the safe and stable operation requirements of overhead conductors of power grids and electrified railways in complex operating environments. Summary of the Invention

[0006] The purpose of this invention is to provide a combined insulation and anti-galling device for overhead conductors to solve the problems existing in the prior art and effectively control the phenomenon of galloping of overhead conductors and discharge between conductors.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a combined insulation and anti-galling device for overhead conductors, comprising: Several separate insulating anti-galling units are provided. Each separate insulating anti-galling unit includes an insulating sheath and a current-disrupting section. A male connector and a female connector are fixedly connected to both ends of the insulating sheath, and the current-disrupting section is fixedly connected to the insulating sheath and the female connector. The male connector is plugged into the female connector of the adjacent separate insulating anti-galling unit, and the female connector is plugged into the male connector of the adjacent separate insulating anti-galling unit. The insulating sheath, the male connector, and the female connector are all provided with hollow cavities for accommodating overhead conductors. The several current-disrupting sections are oriented in different directions.

[0008] Preferably, the outer surface of the male connector is provided with a plurality of raised keys, which are distributed at equal angles on the outer surface of the male connector, and the inner edge of the female connector is provided with a plurality of keyways, with the raised keys corresponding to the keyways.

[0009] Preferably, the turbulence section is provided with an opening, and the two sides of the opening are respectively a first outer edge and a second outer edge. The first outer edge and the second outer edge extend along the axial direction of the conductor. A male bayonet is provided on the first outer edge, and a female bayonet is provided on the second outer edge to cooperate with the male bayonet structure.

[0010] Preferably, the insulating sleeve, the turbulence section, the male connector, and the female connector are all made of silicone rubber.

[0011] Preferably, the surface of the insulating sheath has several pits.

[0012] The present invention discloses the following technical effects: 1. This invention uses several separate insulated anti-galloping units connected sequentially along the conductor axis to form a combined structure. The overall length and arrangement of the anti-galloping device can be flexibly adjusted according to the conductor diameter, span length and galloping characteristics of different lines. It is applicable to various application scenarios such as overhead power transmission lines and overhead conductors of electrified railways, and has good versatility and engineering adaptability.

[0013] 2. The split-type insulated anti-galling unit is made of silicone rubber material. The insulating sheath, male connector and female connector form a continuous hollow encapsulation structure, which allows the anti-galling device to completely encapsulate the conductor after installation. This effectively increases the insulation distance of the conductor to the outside, reduces the risk of electrical accidents such as discharge and flashover when the conductor spacing is small, and improves the safety of overhead conductor operation.

[0014] 3. By setting up a turbulence section on the outside of the insulation sheath and the bus joint, the airflow distribution around the conductor is changed, the stable vortex-induced vibration conditions are disrupted, and the periodic aerodynamic excitation of the conductor under strong wind and icing conditions is reduced, which helps to weaken the conductor galloping tendency and improve the line operation stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the overhead conductor combined insulation and anti-galling device of the present invention; Figure 2 This is a schematic diagram illustrating the usage state of the present invention; Figure 3 This is a side view of the split-type insulating anti-flying unit of the present invention; Figure 4 This is a side sectional view of the split-type insulating anti-dance unit of the present invention; Figure 5 This is a front view of the split-type insulating anti-dance unit of the present invention; Figure 6 Flow field diagram for a crescent-shaped, ice-covered overhead conductor; Figure 7 Flow field diagram of overhead conductors after installation of combined insulation and anti-galling device; Among them, 1. Split-type insulated anti-dash unit; 2. Insulating sleeve; 3. Turbulence section; 4. Male connector; 5. Female connector; 6. Raised key; 7. Keyway; 8. Recess; 9. First outer edge; 10. Second outer edge; 11. Male bayonet; 12. Female bayonet. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Reference Figure 1-7 This invention provides a combined insulation and anti-galling device for overhead conductors, comprising: Several separate insulating anti-collision units 1, each including an insulating sleeve 2 and a disturbance section 3. The insulating sleeve 2 is fixedly connected to a male connector 4 and a female connector 5 at both ends. The disturbance section 3 is fixedly connected to the insulating sleeve 2 and the female connector 5. The male connector 4 and the female connector 5 of the adjacent separate insulating anti-collision unit 1 are plugged in and matched. The female connector 5 and the male connector 4 of the adjacent separate insulating anti-collision unit 1 are plugged in and matched. The insulating sleeve 2, the male connector 4 and the female connector 5 are all provided with hollow cavities. The hollow cavities are used to accommodate the overhead conductors. The disturbance sections 3 are oriented in different directions.

[0020] In this device, the insulating sleeve 2, male connector 4, and female connector 5 each have an axially penetrating hollow cavity inside. This hollow cavity is used to accommodate and cover the overhead conductor, allowing the separate insulating anti-galling unit 1 to be fitted onto the outside of the conductor, forming a continuous insulating covering structure for the conductor after installation. The male connector 4 and female connector 5 are respectively fixedly installed at both ends of the insulating sleeve 2 to achieve connection between adjacent separate insulating anti-galling units 1. By inserting the male connector 4 into the female connector 5, multiple separate insulating anti-galling units 1 are sequentially connected along the conductor's axial direction to form an integral, continuous, combined insulating anti-galling device. The turbulence section 3 is fixedly installed on the outside of the insulating sleeve 2 and female connector 5 to change the airflow distribution around the conductor and reduce the aerodynamic excitation experienced by the conductor under wind.

[0021] After multiple separate insulated anti-galloping units 1 are installed on the overhead conductor, the relative angles of the disturbance sections 3 of adjacent units are different. The aerodynamic loads on different units are not exactly the same in magnitude and direction. The aerodynamic disturbances generated by each unit affect and disperse each other, changing the overall aerodynamic characteristics of the conductor, thereby weakening the conditions for the conductor to form stable galloping under strong wind and icing conditions.

[0022] Meanwhile, the overall coverage of the conductor by the split insulation anti-galling unit 1 and the continuous insulation protective layer formed by the snap-fit ​​structure of the turbulence section 3 can effectively increase the insulation distance of the conductor to the outside, reduce the risk of electrical accidents such as discharge and flashover when the conductor spacing is small, and thus improve the electrical safety of the conductor operation while suppressing conductor galloping.

[0023] When in use, multiple separate insulating anti-galloping units 1 are connected sequentially along the axial direction of the overhead conductor to form a combined insulating anti-galloping device, which is then installed on the overhead conductor to suppress conductor galloping and improve the conductor's insulation protection performance. The separate insulating anti-galloping unit 1 has a modular structure, and its quantity can be selected and combined according to the conductor span length, galloping characteristics, and operating environment, so that the overall length of the anti-galloping device has good adjustability.

[0024] The scheme is further optimized by providing several protruding keys 6 on the outer surface of the male connector 3, which are distributed at equal angles on the outer surface of the male connector 3. Several keyways 7 are provided on the inner edge of the female connector 5, and the protruding keys 6 and keyways 7 are set in correspondence.

[0025] When connecting adjacent split-type insulating anti-fighting units 1, the male connector 4 can be fully inserted into the female connector 5 only when the convex key 6 and the keyway 7 are aligned at an angle, thereby achieving a reliable connection of the split-type insulating anti-fighting units 1.

[0026] The meshing structure of the convex key 6 and the keyway 7 prevents relative circumferential rotation between adjacent split insulation anti-galling units 1, and causes the turbulence section 3 of each split insulation anti-galling unit 1 to form different relative angles in the circumferential direction. This relative angle can be selectively adjusted according to the terrain conditions, prevailing wind direction, and meteorological environment of the line.

[0027] The scheme is further optimized by providing an opening on the turbulence section 3, with a first outer edge 9 and a second outer edge 10 on both sides of the opening. The first outer edge 9 and the second outer edge 10 extend along the conductor axis. A male bayonet 11 is provided on the first outer edge 9, and a female bayonet 12 that cooperates with the structure of the male bayonet 11 is provided on the second outer edge 10.

[0028] The snap-fit ​​mechanism between the male bayonet 11 and the female bayonet 12 allows for rapid assembly and disassembly of the spoiler section 3, facilitating on-site installation and subsequent maintenance and replacement. Simultaneously, this snap-fit ​​structure ensures that the spoiler section 3 fits tightly against and covers the outer periphery of the conductor after installation, reducing local gaps and contributing to a continuous and stable insulation protection structure, thereby reducing the risk of conductor discharge.

[0029] During actual installation, a special silicone rubber adhesive can be applied to the hollow cavity of the split-insulation anti-galling unit 1 and the opening of the turbulence section 3. Then, the split-insulation anti-galling unit 1 is fitted onto the outside of the overhead conductor. Through the synergistic effect of the adhesive and the snap-fit ​​structure, the anti-galling device is reliably fixed to the conductor, preventing axial slippage or loosening during long-term operation.

[0030] The design was further optimized so that the insulating sleeve 1, the turbulence section 3, the male connector 4, and the female connector 5 are all made of silicone rubber.

[0031] The split-type insulation anti-galling unit 1 is made entirely of silicone rubber, which has good insulation performance, flexibility, aging resistance and environmental adaptability, and is suitable for long-term outdoor operation of high-voltage overhead conductors.

[0032] The design was further optimized by creating several pits 8 on the surface of the insulating sheath 2.

[0033] Several pits 8 are regularly arranged on the surface of the insulating sheath 2. Through this pit structure, while ensuring the overall mechanical strength and insulation performance of the insulating sheath 2, it helps to reduce the aerodynamic resistance on the surface of the device and reduce the additional impact of wind load on the conductor and tower structure.

[0034] The beneficial effects of this patent are: 1. This invention uses several separate insulated anti-galloping units connected sequentially along the conductor axis to form a combined structure. The overall length and arrangement of the anti-galloping device can be flexibly adjusted according to the conductor diameter, span length and galloping characteristics of different lines. It is applicable to various application scenarios such as overhead power transmission lines and overhead conductors of electrified railways, and has good versatility and engineering adaptability.

[0035] 2. The split-type insulated anti-galling unit is made of silicone rubber material. The insulating sheath, male connector and female connector form a continuous hollow encapsulation structure, which allows the anti-galling device to completely encapsulate the conductor after installation. This effectively increases the insulation distance of the conductor to the outside, reduces the risk of electrical accidents such as discharge and flashover when the conductor spacing is small, and improves the safety of overhead conductor operation.

[0036] 3. By setting up a turbulence section on the outside of the insulation sheath and the bus joint, the airflow distribution around the conductor is changed, the stable vortex-induced vibration conditions are disrupted, and the periodic aerodynamic excitation of the conductor under strong wind and icing conditions is reduced, which helps to weaken the conductor galloping tendency and improve the line operation stability.

[0037] 4. Adjacent split-insulated anti-galling units are connected by a keyway structure, so that each turbulence section forms a different relative angle in the circumferential direction. The aerodynamic loads on different units are different in direction and amplitude, which can influence and disperse each other, thereby avoiding the conductor from forming a large aerodynamic force in a single direction, and improving the stability of the overall aerodynamic performance and the reliability of the anti-galling effect of the combined anti-galling device.

[0038] 5. The turbulence section achieves rapid assembly and disassembly through the male and female bayonet connection structure of the first and second outer edges. This not only facilitates on-site installation and subsequent maintenance, but also allows the device to fit tightly against and cover the outer periphery of the conductor, reducing the generation of local gaps. This helps to form a continuous and stable insulation protective layer, further reducing the possibility of the conductor discharging to the outside.

[0039] 6. The regularly arranged pit structure on the surface of the insulating sheath helps to reduce the aerodynamic resistance of the device surface without significantly increasing the size and weight of the device, thereby reducing the additional impact of wind load on the conductor and hardware structure and extending the service life of the conductor and related hardware.

[0040] 7. By applying a special silicone rubber adhesive to the hollow cavity and opening of the device, the anti-galloping device can form a reliable bond with the wire on the basis of the snap-fit ​​and plug-in structure, preventing axial slippage or loosening during long-term operation and improving the long-term stability and reliability of the device under complex weather conditions.

[0041] Simulation Verification Examples To further verify the effectiveness of the overhead conductor combined insulation anti-galling device of the present invention in improving the aerodynamic characteristics of conductors and suppressing conductor galloping, this embodiment establishes a numerical model and uses computational fluid dynamics to simulate and analyze the conductor flow field characteristics under different working conditions.

[0042] Based on the aforementioned split-unit insulation anti-galling structure, a three-dimensional geometric model of the combined insulation anti-galling device was established and imported into computational fluid dynamics software for flow field simulation calculations. During the simulation, the incoming flow direction was set to form a certain angle with the conductor axis, and the inlet wind speed was set to 10 m / s to simulate the operating state of overhead conductors under high wind conditions.

[0043] Simulation analysis was performed using the following two comparative operating conditions.

[0044] Working Condition 1: Flow Field Simulation of Crescent-Shaped Icing Conductor A crescent-shaped icing conductor model with a thickness of 5 mm was selected, and the flow field around it was simulated without the installation of anti-galloping devices. The results are as shown in the simulation. Figure 6 As shown.

[0045] Working Condition 2: Simulation of Conductor Flow Field After Installation of Combined Insulation Anti-Galloping Device Several separate insulating anti-galloping units were installed along the conductor axis outside the icing conductor model. The disturbance sections of each separate insulating anti-galloping unit were set at different relative angles. The flow field of the conductor after the anti-galloping device was installed was simulated and calculated. The results are shown in the simulation. Figure 7 As shown.

[0046] From simulation Figure 6 The simulation results of the flow field of the crescent-shaped icing conductor shown can be seen that, under the action of the incoming wind speed, the pressure distribution on the windward and leeward sides of the icing conductor has a strong consistency in the direction of conductor extension. The conductor wake structure is relatively stable, the vortex shedding pattern is relatively regular, and the direction of the aerodynamic load on the conductor is relatively concentrated. It is easy to form stable aerodynamic excitation conditions under the action of continuous wind, thereby inducing conductor instability and producing galloping phenomenon.

[0047] From simulation Figure 7 The flow field simulation results after installing the combined insulating anti-galling device show that, due to the different relative angles of the turbulence sections of different split insulating anti-galling units in the circumferential direction, the pressure distribution on the windward and leeward sides of the conductors is significantly different, and the magnitude and direction of the local aerodynamic loads corresponding to each split insulating anti-galling unit are not exactly the same.

[0048] Meanwhile, the vortex shedding patterns around different split-type insulation anti-galling units vary, and they interfere with each other, making the overall wake structure of the conductor more complex and making it difficult to form a consistent aerodynamic force direction along the conductor axis. This can, to some extent, weaken the periodic aerodynamic excitation on the conductor and improve the overall aerodynamic stability of the conductor.

[0049] The above comparative simulations demonstrate that the overhead conductor combined insulation anti-galling device of the present invention, through the synergistic effect of the multi-unit turbulence structure and its relative angle differences, can change the flow field structure around the icy conductor, making the aerodynamic load on the conductor more dispersed, which helps to reduce the tendency of the conductor to gallop under strong wind and icing conditions, and has a positive effect on improving the operational stability of overhead conductors.

[0050] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 this invention.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A combined insulation and anti-galling device for overhead conductors, characterized in that, include: Several separate insulating anti-galling units (1) are provided. Each separate insulating anti-galling unit (1) includes an insulating sleeve (2) and a turbulence section (3). The insulating sleeve (2) is fixedly connected to a male connector (4) and a female connector (5) at both ends. The turbulence section (3) is fixedly connected to the insulating sleeve (2) and the female connector (5). The male connector (4) is plugged into the female connector (5) of the adjacent separate insulating anti-galling unit (1). The female connector (5) is plugged into the male connector (4) of the adjacent separate insulating anti-galling unit (1). The insulating sleeve (2), the male connector (4) and the female connector (5) are all provided with hollow cavities. The hollow cavities are used to accommodate overhead conductors. The several turbulence sections (3) are oriented in different directions.

2. The overhead conductor combined insulation and anti-galling device according to claim 1, characterized in that: The male connector (3) has several protruding keys (6) on its outer surface. The protruding keys (6) are distributed at equal angles on the outer surface of the male connector (3). The female connector (5) has several keyways (7) on its inner edge. The protruding keys (6) and the keyways (7) are correspondingly arranged.

3. The overhead conductor combined insulation and anti-galling device according to claim 1, characterized in that: The turbulence section (3) is provided with an opening, and the two sides of the opening are a first outer edge (9) and a second outer edge (10), respectively. The first outer edge (9) and the second outer edge (10) extend along the axial direction of the conductor. The first outer edge (9) is provided with a male bayonet (11), and the second outer edge (10) is provided with a female bayonet (12) that cooperates with the structure of the male bayonet (11).

4. The overhead conductor combined insulation and anti-galling device according to claim 3, characterized in that: The insulating sheath (1), the turbulence section (3), the male connector (4) and the female connector (5) are all made of silicone rubber.

5. The overhead conductor combined insulation and anti-galling device according to claim 1, characterized in that: The surface of the insulating sheath (2) is provided with several pits (8).

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