Lightning protection backup suspension device

Abstract

The invention relates to the technical field of suspension devices, in particular to a lightning protection backup suspension device which comprises a ball head hanging plate. The lower end of the ball head hanging plate is provided with an insulator string, the lower end of the insulator string is provided with a WJ-shaped socket hanging plate, an installation interface of the WJ-shaped socket hanging plate is provided with a shielding ring through a bolt, the lower end of the WJ-shaped socket hanging plate is provided with a parallel hanging plate, the lower end of the parallel hanging plate is provided with a sleeve, and the lower end of the sleeve is provided with an XT-shaped jumper suspension clamp used for fixing a wire. And pre-twisted connection strips are wound on the wires on the two sides of the XT-type jumper suspension clamp. According to the device, lightning protection can be accurately carried out, the key problem that wires at the two ends of a suspension clamp of a low-voltage power transmission line in a mountainous area are prone to being damaged by lightning is solved, backup electric conduction of the pre-twisted connecting strip, stable connection of the XT-type jumper suspension clamp and the connecting strip hoop and lightning guiding protection of the shielding ring act synergistically, and an all-around protection system is formed; the lightning stroke damage rate of the part is effectively reduced, and the continuity and stability of power supply are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of suspension devices, and in particular to a lightning protection backup suspension device. Background Art

[0002] Mountainous areas are characterized by complex terrain, and power transmission and distribution lines are often laid out in scattered, long-span, winding paths that follow the slopes of the mountains. The high altitude, high humidity, and dense vegetation in mountainous areas create a harsh, often inclement environment prone to frequent lightning activity. During thunderstorms, the conductors at either end of the suspension clamps are particularly vulnerable to lightning strikes, melting and breaking strands. The variable mountainous terrain results in uneven electromagnetic field distribution, making it easy for lightning to concentrate strikes on the conductors at either end of the suspension clamps. Furthermore, severe weather conditions such as strong winds and heavy rain exacerbate the shaking of the conductor-clamp connection, degrading the electrical contact performance. When struck by lightning, excessive contact resistance can cause localized overheating, further damaging the conductors and connected components.

[0003] At present, the traditional lightning protection measures adopted by power transmission and distribution lines in mountainous areas, such as installing ordinary lightning arresters and erecting lightning conductors, are difficult to effectively protect the conductors at both ends of the suspension clamps; ordinary lightning arresters cannot accurately protect the connection between the conductors and the suspension clamps; lightning conductors are restricted by the mountainous terrain and are difficult to fully cover, and their protection effect against lightning strikes is limited; at the same time, the existing suspension devices have insufficient mechanical strength under the complex terrain environment and severe weather conditions in mountainous areas, and cannot withstand lightning shocks and long-term wind vibrations, resulting in loosening and breaking of the connection between the conductors and the suspension clamps, seriously affecting the stability of the power supply. There is an urgent need for a highly targeted lightning protection device to ensure the safe operation of power transmission and distribution lines in mountainous areas.

[0004] Therefore, in view of the above-mentioned problems in the application of power transmission and distribution lines in mountainous areas, where lightning protection measures are difficult to accurately protect the conductors at both ends of the suspension clamp, and the mechanical strength of the suspension device is insufficient to withstand the impact of harsh environments, resulting in poor line safety and stability, a lightning protection backup suspension device can be designed. Summary of the Invention

[0005] In order to overcome the problem that lightning protection measures cannot accurately protect the conductors at both ends of the suspension clamp in the application of power transmission and distribution lines in mountainous areas, and the mechanical strength of the suspension device is insufficient to withstand the impact of harsh environments, resulting in poor line safety and stability.

[0006] The technical solution is as follows: a lightning protection backup suspension device, including a ball head hanging plate; an insulator string is installed at the lower end of the ball head hanging plate, a WJ-type bowl head hanging plate is installed at the lower end of the insulator string, a shielding ring is installed on the mounting interface of the WJ-type bowl head hanging plate through bolts, a parallel hanging plate is installed at the lower end of the WJ-type bowl head hanging plate, a sleeve is installed at the lower end of the parallel hanging plate, an XT-type jumper suspension clamp for fixing the conductor is installed at the lower end of the sleeve, pre-twisted splicing strips are wrapped around the conductors on both sides of the XT-type jumper suspension clamp, and a splicing strip clamp is installed at the lower end of the XT-type jumper suspension clamp.

[0007] Furthermore, the pre-twisted splicing bar is formed by twisting multiple strands of high-strength aluminum alloy, copper alloy or titanium alloy. The pre-twisted splicing bar generates radial pressure through elastic deformation to achieve electrical connection and mechanical fixation with the conductor.

[0008] Furthermore, the inner side of the pre-twisted splicing strip is coated with a special conductive adhesive to enhance connection stability, improve conductivity, prevent oxidation corrosion, and buffer mechanical stress.

[0009] Furthermore, the ingredients of the special conductive adhesive include silver powder, copper powder, polymer matrix resin, coupling agent, toughening agent, diluent and curing agent.

[0010] Furthermore, the connecting bar clamp is an integrally formed bent metal component, and a fastening bolt group is installed on the outside of the connecting bar clamp, and the fastening bolt group uses high-strength bolts.

[0011] Furthermore, a semicircular structure is provided on the inner side of the splicing strip clamp, on which a rubber pad is installed. The rubber pad is made of a highly elastic and wear-resistant rubber material, and a notch is provided inside the rubber pad for facilitating the installation of the pre-twisted splicing strip.

[0012] Furthermore, the shielding ring is a tubular metal ring made of aluminum alloy. The surface is polished to reduce corona loss. The polishing process adopts a combination of advanced mechanical polishing and chemical polishing to achieve a high degree of finish on the surface of the shielding ring. The surface roughness Ra value of the polished shielding ring is controlled below .μm.

[0013] Furthermore, a shielding ring surrounds both sides of the XT-type jumper suspension clamp to uniformly distribute the electric field strength.

[0014] Furthermore, the ball head hanging plate is made of high-strength alloy steel and its surface is galvanized; the insulator string is composed of multiple high-performance insulator units connected in series, and each insulator unit is made of silicone rubber.

[0015] Furthermore, the WJ-type bowl head hanging plate is made of high-quality carbon structural steel; the parallel hanging plate is made of aluminum alloy; the casing is made of ceramic; and the XT-type jumper suspension clamp is cast from high-strength aluminum alloy.

[0016] The beneficial effect is that the device of the present invention can accurately provide lightning protection. To address the key issue of the conductors at both ends of the suspension clamp of low-voltage transmission lines in mountainous areas being susceptible to lightning damage, the backup conductivity of the pre-twisted splice bar, the stable connection between the XT-type jumper suspension clamp and the splice bar clamp, and the lightning guidance protection of the shielding ring work together to form a comprehensive protection system, effectively reducing the lightning damage rate in this area and ensuring the continuity and stability of the power supply.

[0017] Adaptable to mountainous environments: All components of the device are made of high-strength, weather-resistant materials, and the structure is optimized based on the complex terrain and harsh climate of the mountainous areas. Whether it is dealing with strong winds, heavy rain or low temperature environments, it can maintain good performance, reduce device damage and failures caused by environmental factors, and reduce maintenance frequency and costs.

[0018] Easy installation and maintenance: The device structure design fully considers the limitations of construction conditions in mountainous areas. The installation process is simple, and no large-scale construction equipment or complicated operations are required, making it convenient for installation and modification in complex mountainous terrain environments. The modular structure design allows for rapid replacement of damaged parts, such as pre-twisted splicing strips and shielding rings, when a device malfunctions. This improves maintenance efficiency and reduces maintenance difficulty and cost. It is particularly suitable for mountainous areas where low-voltage transmission lines are numerous and widespread, and maintenance is inconvenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A first angle sectional view of the lightning protection backup suspension device of the present invention;

[0020] Figure 2 is a second angled cross-sectional view of the present invention;

[0021] Figure 3 is a cross-sectional view of a parallel hanging plate of the present invention;

[0022] Figure 4 It is a cross-sectional view of the XT type jumper suspension clamp of the present invention;

[0023] Figure 5 is a cross-sectional view of the pre-twisted splicing strip of the present invention;

[0024] Figure 6 It is a cross-sectional view of the splicing bar clamp of the present invention;

[0025] Figure 7 is a cross-sectional view of the rubber pad of the present invention;

[0026] Figure 8 A cross-sectional view of a notch of the present invention;

[0027] Figure 9 A first angle cross-sectional view of the shielding ring of the present invention;

[0028] Figure 10A first angle cross-sectional view of the shielding ring of the present invention;

[0029] Figure 11 It is a cross-sectional view of a conventional single suspension string structure of the present invention;

[0030] Figure 12 It is a cross-sectional view of a conventional XG type suspension wire clamp of the present invention.

[0031] In the accompanying drawings: 1. Ball head hanging plate; 2. Insulator string; 3. WJ type bowl head hanging plate; 4. Shielding ring; 5. Parallel hanging plate; 6. Bushing; 7. XT type jumper suspension clamp; 8. Pre-twisted splicing strip; 9. Splicing strip clamp; 10. Special conductive adhesive; 11. Fastening bolt group; 12. Rubber pad; 13. Notch; 14. W type bowl head hanging plate; 15. XG type suspension clamp. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] See also Figures 1-10 The present invention provides an embodiment: a lightning protection backup suspension device, comprising a ball head hanging plate 1; an insulator string 2 is installed at the lower end of the ball head hanging plate 1, a WJ-type bowl head hanging plate 3 is installed at the lower end of the insulator string 2, a shielding ring 4 is installed on the mounting interface of the WJ-type bowl head hanging plate 3 through bolts, a parallel hanging plate 5 is installed at the lower end of the WJ-type bowl head hanging plate 3, a sleeve 6 is installed at the lower end of the parallel hanging plate 5, an XT-type jumper suspension clamp 7 for fixing the conductor is installed at the lower end of the sleeve 6, pre-twisted splicing strips 8 are wound around the conductors on both sides of the XT-type jumper suspension clamp 7, and a splicing strip clamp 9 is installed at the lower end of the XT-type jumper suspension clamp 7;

[0034] The ball head hanging plate 1 is connected to the tower cross arm or supporting hardware through the top ring interface, and its lower end is hinged to the insulator string 2 through the ball and socket structure to form a swingable flexible connection structure to adapt to the swing displacement of the conductor caused by wind in mountainous areas;

[0035] The pre-twisted splice bar 8 is made of multiple strands of high-strength aluminum alloy, copper alloy or titanium alloy. The pre-twisted splice bar 8 generates radial pressure through elastic deformation to achieve electrical connection and mechanical fixation with the conductor.

[0036] The pre-twisted splicing strip 8 is spirally wound around both sides of the contact area between the conductor and the clamp, with a single-side covering length of ≥150mm.

[0037] The inner side of the pre-twisted connecting strip 8 is coated with a special conductive adhesive 10 to enhance the connection stability, improve the conductive performance, prevent oxidation corrosion, and buffer mechanical stress.

[0038] The components of the special conductive adhesive 10 include silver powder, copper powder, polymer matrix resin, coupling agent, toughening agent, diluent and curing agent;

[0039] Silver powder and copper powder are compounded in a mass ratio of 3:1, and the total filler content accounts for 65% of the colloid mass, forming a continuous conductive network; the polymer matrix resin is epoxy resin E-51 and silicone rubber modified polyurethane, with a mass ratio of 2:1, which combines the high strength of epoxy resin and the weather resistance of silicone rubber.

[0040] The connecting bar clamp 9 is an integrally formed bent metal component. A fastening bolt group 11 is installed on the outside of the connecting bar clamp 9. The fastening bolt group 11 adopts high-strength bolts.

[0041] A semicircular structure is provided inside the splicing strip clamp 9, on which a rubber pad 12 is installed. The rubber pad 12 is made of a highly elastic and wear-resistant rubber material, and a notch 13 is provided inside the rubber pad 12 for facilitating the installation of the pre-twisted splicing strip 8.

[0042] The shielding ring 4 is a tubular metal ring made of aluminum alloy. The surface is polished to reduce corona loss. The polishing process adopts a combination of advanced mechanical polishing and chemical polishing to achieve a high degree of finish on the surface of the shielding ring 4. The surface roughness Ra value of the polished shielding ring 4 is controlled below 0.8μm.

[0043] The shielding ring 4 surrounds both sides of the XT-type jumper suspension clamp 7 to uniformly distribute the electric field strength;

[0044] The shielding ring 4 is polished in a circular manner at a speed of 1500 r / min using a wool wheel with a diameter of 100 mm and alumina polishing paste to remove surface milling marks and reduce the surface roughness to Ra≤1.6 μm; it is immersed in a mixture of phosphoric acid, sulfuric acid and nitric acid at a temperature of 60±5°C for 10-15 minutes, with a volume ratio of 6:3:1, to further refine the surface micro-undulations through selective corrosion, ultimately achieving a mirror effect of Ra≤0.8 μm.

[0045] The ball head hanging plate 1 is made of high-strength alloy steel, and its surface is galvanized; the insulator string 2 is composed of multiple high-performance insulator units connected in series, and each insulator unit is made of silicone rubber;

[0046] The silicone rubber insulator unit adopts high temperature vulcanized silicone rubber (HTV) with a Shore hardness of 65±5A and an added 20% aluminum hydroxide flame retardant. The tracking resistance level reaches CTI600V, and the shed structure is designed with a creepage distance ≥31mm / kV, meeting the anti-pollution requirements of pollution level III in mountainous areas.

[0047] The material of the WJ type bowl head hanging plate 3 is high-quality carbon structural steel; the parallel hanging plate 5 is made of aluminum alloy; the casing 6 is made of ceramic; the XT type jumper suspension clamp 7 is made of high-strength aluminum alloy casting;

[0048] The sleeve 6 is made of 95% alumina ceramic with a bending strength of ≥300 MPa and a dielectric constant of 9-10 (1 MHz), which can prevent electrolytic corrosion caused by stray current between the hanging plates.

[0049] Conventional single suspension string structure such as Figure 11 As shown, it consists of a ball head hanging plate 1, an insulator string 2, a W-shaped bowl head hanging plate 14, an XG-type suspension wire clamp 15 and a conductor; this structure is not equipped with lightning protection and backup devices, and there are risks such as lightning strike breakage and mechanical failure.

[0050] Figure 12 This is a conventional connection method between the suspension clamp and the conductor and insulator string 2. The XG type suspension clamp 15 fixes the conductor to the hull structure through U-bolts, and the top is connected to the lower end of the insulator string 2 through a suspension plate to form a stable suspension system.

[0051] The ball head hanging plate 1 is connected to the supporting structure of the tower or the transmission and distribution line through the top interface. Its high-strength alloy steel material ensures tensile strength and can bear the entire weight of the conductor.

[0052] The lower end of the ball head hanging plate 1 is connected in series with the insulator string 2. The insulator string 2 is composed of insulator units made of silicone rubber material to achieve electrical insulation and buffer mechanical vibration.

[0053] The lower end of the insulator string 2 is connected to the parallel hanging plate 5 through the WJ-shaped bowl head hanging plate 3. The high-quality carbon structural steel material of the WJ-shaped bowl head hanging plate 3 ensures the connection strength. The parallel hanging plate 5 is used to fix subsequent components in the horizontal direction.

[0054] The shielding ring 4 is sleeved on the outside of the installation interface of the WJ-type bowl head hanging plate 3, surrounds both sides of the XT-type jumper suspension clamp 7, and is fixed by bolts. Its aluminum alloy tubular structure evens out the electric field near the conductor and reduces corona loss.

[0055] The lower end of the parallel hanging plate 5 is connected to the XT-type jumper suspension clamp 7 through a ceramic bushing 6. The bushing 6 enhances insulation and prevents leakage caused by direct contact between metal parts.

[0056] The XT jumper suspension clamp 7 clamps the conductors, and pre-twisted connecting strips 8 are wrapped around the conductors on both sides. The pre-twisted connecting strips 8 are twisted by multiple strands of high-strength aluminum alloy / copper alloy, and generate radial pressure through elastic deformation, making close contact with the conductors.

[0057] The special conductive adhesive 10 on the inner side of the pre-twisted splicing strip 8 fills the gap, thereby enhancing the conductivity and preventing oxidation, while buffering the mechanical stress.

[0058] The splicing bar clamp 9 wraps around the outside of the pre-twisted splicing bar 8 and is fixed with precise torque by tightening the bolt group 11. The rubber pad 12 on the inside of the splicing bar clamp 9 adapts to the shape of the pre-twisted splicing bar through the notch 13 to reduce loosening caused by vibration.

[0059] When thunderstorm occurs, the shielding ring 4 uses the tubular metal structure to evenly distribute the electromagnetic field near the wires at both ends of the XT-type jumper suspension clamp 7, preventing lightning from hitting the wires due to electric field distortion caused by the terrain, and guiding the lightning to be released along the surface of the shielding ring 4, reducing the probability of the wires being directly struck by lightning.

[0060] If lightning strikes a conductor, the pre-twisted connecting strip 8 acts as a parallel conductive path to distribute the lightning current through the multi-strand twisted structure, thus preventing the current from concentrating at the connection between the XT jumper suspension clamp 7 and the conductor.

[0061] The special conductive adhesive 10 inside the pre-twisted splice strip 8 reduces contact resistance and prevents local overheating during lightning strikes. If the contact resistance between the XT jumper suspension clamp 7 and the conductor increases due to inclement weather, the low-resistance path of the pre-twisted splice strip 8 can maintain conductive continuity and avoid strand burnout.

[0062] The splice bar clamp 9 forms a "rigid fixation + elastic buffer" structure by tightening the bolt group 11 and the rubber pad 12 to resist the shaking of the wires caused by strong winds in mountainous areas, prevent the pre-twisted splice bar 8 from loosening, and ensure the stability of the mechanical connection.

[0063] The high-strength material design of the ball head hanging plate 1, insulator string 2 and other components can maintain performance in environments such as high humidity and heavy rain, avoiding device failure due to mechanical fatigue or corrosion.

[0064] The high elasticity of the rubber pad 12 and the notch 13 design absorb the stress generated by long-term wind vibration of the conductor and prevent friction loss between the pre-twisted splice bar 8 and the splice bar clamp 9; the ceramic bushing 6 and the insulator string 2 are resistant to rain erosion and maintain insulation performance.

[0065] The metal material of the pre-twisted connecting strip 8 has high fatigue resistance and is not easy to break after long-term use. Combined with the anti-oxidation effect of the special conductive adhesive 10, the durability of the electrical connection is ensured.

[0066] When a component, such as the shielding ring 4 or the pre-twisted connecting bar 8, is damaged by lightning, the modular structure allows for individual replacement without disassembling the entire device, thus meeting the maintenance needs of the multi-faceted and wide-ranging power transmission and distribution lines in mountainous areas.

[0067] This device builds a comprehensive lightning protection and line protection system through multi-structure coordination, effectively reducing the damage rate from lightning strikes, adapting to the strong winds and variable temperature and humidity environments in mountainous areas, and is easy to install and maintain, providing reliable protection for the safe and stable operation of low-voltage transmission lines in mountainous areas.

Claims

1. A lightning protection backup suspension device, characterized in that: The invention comprises a ball head hanging plate (1); an insulator string (2) is installed at the lower end of the ball head hanging plate (1); a WJ-type bowl head hanging plate (3) is installed at the lower end of the insulator string (2); a shielding ring (4) is installed at the installation interface of the WJ-type bowl head hanging plate (3) via bolts; a parallel hanging plate (5) is installed at the lower end of the WJ-type bowl head hanging plate (3); a sleeve (6) is installed at the lower end of the parallel hanging plate (5); an XT-type jumper wire suspension clamp (7) for fixing a conductor is installed at the lower end of the sleeve (6); pre-twisted splicing strips (8) are wound around the conductors on both sides of the XT-type jumper wire suspension clamp (7); and a splicing strip clamp (9) is installed at the lower end of the XT-type jumper wire suspension clamp (7).

2. A lightning protection backup suspension device according to claim 1, characterized in that: The pre-twisted connecting strip (8) is formed by twisting multiple strands of high-strength aluminum alloy, copper alloy or titanium alloy. The pre-twisted connecting strip (8) generates radial pressure through elastic deformation to achieve electrical connection and mechanical fixation with the conductor.

3. A lightning protection backup suspension device according to claim 2, characterized in that: The inner side of the pre-twisted connecting strip (8) is coated with a special conductive glue (10) for enhancing connection stability, improving conductivity, preventing oxidation corrosion, and buffering mechanical stress.

4. A lightning protection backup suspension device according to claim 3, characterized in that: The components of the special conductive adhesive (10) include silver powder, copper powder, polymer matrix resin, coupling agent, toughening agent, diluent and curing agent.

5. The lightning protection backup suspension device according to claim 1, characterized in that: The connecting bar hoop (9) is an integrally formed bent metal component. A fastening bolt group (11) is installed on the outside of the connecting bar hoop (9), and the fastening bolt group (11) adopts high-strength bolts.

6. A lightning protection backup suspension device according to claim 5, characterized in that: A semicircular structure is provided on the inner side of the splicing strip clamp (9), and a rubber pad (12) is installed on the semicircular structure. The rubber pad (12) is made of a highly elastic and wear-resistant rubber material. A notch (13) is provided inside the rubber pad (12) for facilitating the installation of the pre-twisted splicing strip (8).

7. The lightning protection backup suspension device according to claim 1, characterized in that: The shielding ring (4) is a tubular metal ring made of aluminum alloy. The surface is polished to reduce corona loss. The polishing process adopts a combination of advanced mechanical polishing and chemical polishing to achieve high finish on the surface of the shielding ring (4). The surface roughness Ra value of the polished shielding ring (4) is controlled below 0.8 μm.

8. The lightning protection backup suspension device according to claim 7, characterized in that: The shielding ring (4) surrounds both sides of the XT-type jumper suspension clamp (7) and is used to make the electric field strength uniform.

9. The lightning protection backup suspension device according to claim 1, characterized in that: The ball head hanging plate (1) is made of high-strength alloy steel, and its surface is galvanized; the insulator string (2) is composed of a plurality of high-performance insulator units connected in series, and each insulator unit is made of silicone rubber.

10. The lightning protection backup suspension device according to claim 1, characterized in that: The material of the WJ-type bowl head hanging plate (3) is high-quality carbon structural steel; the parallel hanging plate (5) is made of aluminum alloy; the casing (6) is made of ceramic material; and the XT-type jumper suspension clamp (7) is cast from high-strength aluminum alloy.

Images